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captain-amygdala.pistorm/raylib/rlgl.h
beeanyew 31f58d05d3 [MEGA-WIP] Raylib-based RTG output 
NOTE: A working keyboard must be attached to the Raspberry Pi while testing this, otherwise it's impossible to actually quit the emulator.
raylib takes possession of the SSH keyboard for some reason, which makes it so you can't Ctrl+C out of the emulator over SSH, you must Ctrl+C or press Q on the Pi keyboard.

A mostly working RTG implementation using raylib instead of SDL2.0
Greatly decreases the rendering overhead for 8bpp modes and gets rid of the need for hardware ARGB888 texture format support.
RTG will be initialized using the resolution of the Raspberry Pi, and onbly the 320x200/320x240 modes are currently scaled to the full vertical area of the screen.
2021-05-01 19:43:26 +02:00

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/**********************************************************************************************
*
* rlgl v3.7 - raylib OpenGL abstraction layer
*
* rlgl is a wrapper for multiple OpenGL versions (1.1, 2.1, 3.3 Core, ES 2.0) to
* pseudo-OpenGL 1.1 style functions (rlVertex, rlTranslate, rlRotate...).
*
* When chosing an OpenGL version greater than OpenGL 1.1, rlgl stores vertex data on internal
* VBO buffers (and VAOs if available). It requires calling 3 functions:
* rlglInit() - Initialize internal buffers and auxiliary resources
* rlglClose() - De-initialize internal buffers data and other auxiliar resources
*
* CONFIGURATION:
*
* #define GRAPHICS_API_OPENGL_11
* #define GRAPHICS_API_OPENGL_21
* #define GRAPHICS_API_OPENGL_33
* #define GRAPHICS_API_OPENGL_ES2
* Use selected OpenGL graphics backend, should be supported by platform
* Those preprocessor defines are only used on rlgl module, if OpenGL version is
* required by any other module, use rlGetVersion() to check it
*
* #define RLGL_IMPLEMENTATION
* Generates the implementation of the library into the included file.
* If not defined, the library is in header only mode and can be included in other headers
* or source files without problems. But only ONE file should hold the implementation.
*
* #define RLGL_STANDALONE
* Use rlgl as standalone library (no raylib dependency)
*
* #define SUPPORT_GL_DETAILS_INFO
* Show OpenGL extensions and capabilities detailed logs on init
*
* DEPENDENCIES:
* raymath - 3D math functionality (Vector3, Matrix, Quaternion)
* GLAD - OpenGL extensions loading (OpenGL 3.3 Core only)
*
*
* LICENSE: zlib/libpng
*
* Copyright (c) 2014-2021 Ramon Santamaria (@raysan5)
*
* This software is provided "as-is", without any express or implied warranty. In no event
* will the authors be held liable for any damages arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose, including commercial
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not claim that you
* wrote the original software. If you use this software in a product, an acknowledgment
* in the product documentation would be appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
* as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*
**********************************************************************************************/
#ifndef RLGL_H
#define RLGL_H
#if defined(RLGL_STANDALONE)
#define RAYMATH_STANDALONE
#define RAYMATH_HEADER_ONLY
#define RLAPI // We are building or using rlgl as a static library (or Linux shared library)
#if defined(_WIN32)
#if defined(BUILD_LIBTYPE_SHARED)
#define RLAPI __declspec(dllexport) // We are building raylib as a Win32 shared library (.dll)
#elif defined(USE_LIBTYPE_SHARED)
#define RLAPI __declspec(dllimport) // We are using raylib as a Win32 shared library (.dll)
#endif
#endif
// Support TRACELOG macros
#if !defined(TRACELOG)
#define TRACELOG(level, ...) (void)0
#define TRACELOGD(...) (void)0
#endif
// Allow custom memory allocators
#ifndef RL_MALLOC
#define RL_MALLOC(sz) malloc(sz)
#endif
#ifndef RL_CALLOC
#define RL_CALLOC(n,sz) calloc(n,sz)
#endif
#ifndef RL_REALLOC
#define RL_REALLOC(n,sz) realloc(n,sz)
#endif
#ifndef RL_FREE
#define RL_FREE(p) free(p)
#endif
#else
#include "raylib.h" // Required for: Shader, Texture2D
#endif
#include "raymath.h" // Required for: Vector3, Matrix
// Security check in case no GRAPHICS_API_OPENGL_* defined
#if !defined(GRAPHICS_API_OPENGL_11) && \
!defined(GRAPHICS_API_OPENGL_21) && \
!defined(GRAPHICS_API_OPENGL_33) && \
!defined(GRAPHICS_API_OPENGL_ES2)
#define GRAPHICS_API_OPENGL_33
#endif
// Security check in case multiple GRAPHICS_API_OPENGL_* defined
#if defined(GRAPHICS_API_OPENGL_11)
#if defined(GRAPHICS_API_OPENGL_21)
#undef GRAPHICS_API_OPENGL_21
#endif
#if defined(GRAPHICS_API_OPENGL_33)
#undef GRAPHICS_API_OPENGL_33
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
#undef GRAPHICS_API_OPENGL_ES2
#endif
#endif
// OpenGL 2.1 uses most of OpenGL 3.3 Core functionality
// WARNING: Specific parts are checked with #if defines
#if defined(GRAPHICS_API_OPENGL_21)
#define GRAPHICS_API_OPENGL_33
#endif
#define SUPPORT_RENDER_TEXTURES_HINT
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
// Default internal render batch limits
#ifndef DEFAULT_BATCH_BUFFER_ELEMENTS
#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
// This is the maximum amount of elements (quads) per batch
// NOTE: Be careful with text, every letter maps to a quad
#define DEFAULT_BATCH_BUFFER_ELEMENTS 8192
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
// We reduce memory sizes for embedded systems (RPI and HTML5)
// NOTE: On HTML5 (emscripten) this is allocated on heap,
// by default it's only 16MB!...just take care...
#define DEFAULT_BATCH_BUFFER_ELEMENTS 2048
#endif
#endif
#ifndef DEFAULT_BATCH_BUFFERS
#define DEFAULT_BATCH_BUFFERS 1 // Default number of batch buffers (multi-buffering)
#endif
#ifndef DEFAULT_BATCH_DRAWCALLS
#define DEFAULT_BATCH_DRAWCALLS 256 // Default number of batch draw calls (by state changes: mode, texture)
#endif
#ifndef MAX_BATCH_ACTIVE_TEXTURES
#define MAX_BATCH_ACTIVE_TEXTURES 4 // Maximum number of additional textures that can be activated on batch drawing (SetShaderValueTexture())
#endif
// Internal Matrix stack
#ifndef MAX_MATRIX_STACK_SIZE
#define MAX_MATRIX_STACK_SIZE 32 // Maximum size of Matrix stack
#endif
// Vertex buffers id limit
#ifndef MAX_MESH_VERTEX_BUFFERS
#define MAX_MESH_VERTEX_BUFFERS 7 // Maximum vertex buffers (VBO) per mesh
#endif
// Shader and material limits
#ifndef MAX_SHADER_LOCATIONS
#define MAX_SHADER_LOCATIONS 32 // Maximum number of shader locations supported
#endif
#ifndef MAX_MATERIAL_MAPS
#define MAX_MATERIAL_MAPS 12 // Maximum number of shader maps supported
#endif
// Projection matrix culling
#ifndef RL_CULL_DISTANCE_NEAR
#define RL_CULL_DISTANCE_NEAR 0.01 // Default near cull distance
#endif
#ifndef RL_CULL_DISTANCE_FAR
#define RL_CULL_DISTANCE_FAR 1000.0 // Default far cull distance
#endif
// Texture parameters (equivalent to OpenGL defines)
#define RL_TEXTURE_WRAP_S 0x2802 // GL_TEXTURE_WRAP_S
#define RL_TEXTURE_WRAP_T 0x2803 // GL_TEXTURE_WRAP_T
#define RL_TEXTURE_MAG_FILTER 0x2800 // GL_TEXTURE_MAG_FILTER
#define RL_TEXTURE_MIN_FILTER 0x2801 // GL_TEXTURE_MIN_FILTER
#define RL_TEXTURE_FILTER_NEAREST 0x2600 // GL_NEAREST
#define RL_TEXTURE_FILTER_LINEAR 0x2601 // GL_LINEAR
#define RL_TEXTURE_FILTER_MIP_NEAREST 0x2700 // GL_NEAREST_MIPMAP_NEAREST
#define RL_TEXTURE_FILTER_NEAREST_MIP_LINEAR 0x2702 // GL_NEAREST_MIPMAP_LINEAR
#define RL_TEXTURE_FILTER_LINEAR_MIP_NEAREST 0x2701 // GL_LINEAR_MIPMAP_NEAREST
#define RL_TEXTURE_FILTER_MIP_LINEAR 0x2703 // GL_LINEAR_MIPMAP_LINEAR
#define RL_TEXTURE_FILTER_ANISOTROPIC 0x3000 // Anisotropic filter (custom identifier)
#define RL_TEXTURE_WRAP_REPEAT 0x2901 // GL_REPEAT
#define RL_TEXTURE_WRAP_CLAMP 0x812F // GL_CLAMP_TO_EDGE
#define RL_TEXTURE_WRAP_MIRROR_REPEAT 0x8370 // GL_MIRRORED_REPEAT
#define RL_TEXTURE_WRAP_MIRROR_CLAMP 0x8742 // GL_MIRROR_CLAMP_EXT
// Matrix modes (equivalent to OpenGL)
#define RL_MODELVIEW 0x1700 // GL_MODELVIEW
#define RL_PROJECTION 0x1701 // GL_PROJECTION
#define RL_TEXTURE 0x1702 // GL_TEXTURE
// Primitive assembly draw modes
#define RL_LINES 0x0001 // GL_LINES
#define RL_TRIANGLES 0x0004 // GL_TRIANGLES
#define RL_QUADS 0x0007 // GL_QUADS
// GL equivalent data types
#define RL_UNSIGNED_BYTE 0x1401 // GL_UNSIGNED_BYTE
#define RL_FLOAT 0x1406 // GL_FLOAT
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
typedef enum { OPENGL_11 = 1, OPENGL_21, OPENGL_33, OPENGL_ES_20 } GlVersion;
typedef enum {
RL_ATTACHMENT_COLOR_CHANNEL0 = 0,
RL_ATTACHMENT_COLOR_CHANNEL1,
RL_ATTACHMENT_COLOR_CHANNEL2,
RL_ATTACHMENT_COLOR_CHANNEL3,
RL_ATTACHMENT_COLOR_CHANNEL4,
RL_ATTACHMENT_COLOR_CHANNEL5,
RL_ATTACHMENT_COLOR_CHANNEL6,
RL_ATTACHMENT_COLOR_CHANNEL7,
RL_ATTACHMENT_DEPTH = 100,
RL_ATTACHMENT_STENCIL = 200,
} FramebufferAttachType;
typedef enum {
RL_ATTACHMENT_CUBEMAP_POSITIVE_X = 0,
RL_ATTACHMENT_CUBEMAP_NEGATIVE_X,
RL_ATTACHMENT_CUBEMAP_POSITIVE_Y,
RL_ATTACHMENT_CUBEMAP_NEGATIVE_Y,
RL_ATTACHMENT_CUBEMAP_POSITIVE_Z,
RL_ATTACHMENT_CUBEMAP_NEGATIVE_Z,
RL_ATTACHMENT_TEXTURE2D = 100,
RL_ATTACHMENT_RENDERBUFFER = 200,
} FramebufferAttachTextureType;
// Dynamic vertex buffers (position + texcoords + colors + indices arrays)
typedef struct VertexBuffer {
int elementsCount; // Number of elements in the buffer (QUADS)
int vCounter; // Vertex position counter to process (and draw) from full buffer
int tcCounter; // Vertex texcoord counter to process (and draw) from full buffer
int cCounter; // Vertex color counter to process (and draw) from full buffer
float *vertices; // Vertex position (XYZ - 3 components per vertex) (shader-location = 0)
float *texcoords; // Vertex texture coordinates (UV - 2 components per vertex) (shader-location = 1)
unsigned char *colors; // Vertex colors (RGBA - 4 components per vertex) (shader-location = 3)
#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
unsigned int *indices; // Vertex indices (in case vertex data comes indexed) (6 indices per quad)
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
unsigned short *indices; // Vertex indices (in case vertex data comes indexed) (6 indices per quad)
#endif
unsigned int vaoId; // OpenGL Vertex Array Object id
unsigned int vboId[4]; // OpenGL Vertex Buffer Objects id (4 types of vertex data)
} VertexBuffer;
// Draw call type
// NOTE: Only texture changes register a new draw, other state-change-related elements are not
// used at this moment (vaoId, shaderId, matrices), raylib just forces a batch draw call if any
// of those state-change happens (this is done in core module)
typedef struct DrawCall {
int mode; // Drawing mode: LINES, TRIANGLES, QUADS
int vertexCount; // Number of vertex of the draw
int vertexAlignment; // Number of vertex required for index alignment (LINES, TRIANGLES)
//unsigned int vaoId; // Vertex array id to be used on the draw -> Using RLGL.currentBatch->vertexBuffer.vaoId
//unsigned int shaderId; // Shader id to be used on the draw -> Using RLGL.currentShader.id
unsigned int textureId; // Texture id to be used on the draw -> Use to create new draw call if changes
//Matrix projection; // Projection matrix for this draw -> Using RLGL.projection by default
//Matrix modelview; // Modelview matrix for this draw -> Using RLGL.modelview by default
} DrawCall;
// RenderBatch type
typedef struct RenderBatch {
int buffersCount; // Number of vertex buffers (multi-buffering support)
int currentBuffer; // Current buffer tracking in case of multi-buffering
VertexBuffer *vertexBuffer; // Dynamic buffer(s) for vertex data
DrawCall *draws; // Draw calls array, depends on textureId
int drawsCounter; // Draw calls counter
float currentDepth; // Current depth value for next draw
} RenderBatch;
// Shader attribute data types
typedef enum {
SHADER_ATTRIB_FLOAT = 0,
SHADER_ATTRIB_VEC2,
SHADER_ATTRIB_VEC3,
SHADER_ATTRIB_VEC4
} ShaderAttributeDataType;
#if defined(RLGL_STANDALONE)
#ifndef __cplusplus
// Boolean type
typedef enum { false, true } bool;
#endif
// Color type, RGBA (32bit)
typedef struct Color {
unsigned char r;
unsigned char g;
unsigned char b;
unsigned char a;
} Color;
// Texture type
// NOTE: Data stored in GPU memory
typedef struct Texture2D {
unsigned int id; // OpenGL texture id
int width; // Texture base width
int height; // Texture base height
int mipmaps; // Mipmap levels, 1 by default
int format; // Data format (PixelFormat)
} Texture2D;
// Shader type (generic)
typedef struct Shader {
unsigned int id; // Shader program id
int *locs; // Shader locations array (MAX_SHADER_LOCATIONS)
} Shader;
// TraceLog message types
typedef enum {
LOG_ALL,
LOG_TRACE,
LOG_DEBUG,
LOG_INFO,
LOG_WARNING,
LOG_ERROR,
LOG_FATAL,
LOG_NONE
} TraceLogLevel;
// Texture formats (support depends on OpenGL version)
typedef enum {
PIXELFORMAT_UNCOMPRESSED_GRAYSCALE = 1, // 8 bit per pixel (no alpha)
PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA,
PIXELFORMAT_UNCOMPRESSED_R5G6B5, // 16 bpp
PIXELFORMAT_UNCOMPRESSED_RGB565_BE, // 16 bpp (big endian)
PIXELFORMAT_UNCOMPRESSED_R8G8B8, // 24 bpp
PIXELFORMAT_UNCOMPRESSED_R5G5B5A1, // 16 bpp (1 bit alpha)
PIXELFORMAT_UNCOMPRESSED_R4G4B4A4, // 16 bpp (4 bit alpha)
PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, // 32 bpp
PIXELFORMAT_UNCOMPRESSED_R32, // 32 bpp (1 channel - float)
PIXELFORMAT_UNCOMPRESSED_R32G32B32, // 32*3 bpp (3 channels - float)
PIXELFORMAT_UNCOMPRESSED_R32G32B32A32, // 32*4 bpp (4 channels - float)
PIXELFORMAT_COMPRESSED_DXT1_RGB, // 4 bpp (no alpha)
PIXELFORMAT_COMPRESSED_DXT1_RGBA, // 4 bpp (1 bit alpha)
PIXELFORMAT_COMPRESSED_DXT3_RGBA, // 8 bpp
PIXELFORMAT_COMPRESSED_DXT5_RGBA, // 8 bpp
PIXELFORMAT_COMPRESSED_ETC1_RGB, // 4 bpp
PIXELFORMAT_COMPRESSED_ETC2_RGB, // 4 bpp
PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA, // 8 bpp
PIXELFORMAT_COMPRESSED_PVRT_RGB, // 4 bpp
PIXELFORMAT_COMPRESSED_PVRT_RGBA, // 4 bpp
PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA, // 8 bpp
PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA // 2 bpp
} PixelFormat;
// Texture parameters: filter mode
// NOTE 1: Filtering considers mipmaps if available in the texture
// NOTE 2: Filter is accordingly set for minification and magnification
typedef enum {
TEXTURE_FILTER_POINT = 0, // No filter, just pixel aproximation
TEXTURE_FILTER_BILINEAR, // Linear filtering
TEXTURE_FILTER_TRILINEAR, // Trilinear filtering (linear with mipmaps)
TEXTURE_FILTER_ANISOTROPIC_4X, // Anisotropic filtering 4x
TEXTURE_FILTER_ANISOTROPIC_8X, // Anisotropic filtering 8x
TEXTURE_FILTER_ANISOTROPIC_16X, // Anisotropic filtering 16x
} TextureFilter;
// Texture parameters: wrap mode
typedef enum {
TEXTURE_WRAP_REPEAT = 0, // Repeats texture in tiled mode
TEXTURE_WRAP_CLAMP, // Clamps texture to edge pixel in tiled mode
TEXTURE_WRAP_MIRROR_REPEAT, // Mirrors and repeats the texture in tiled mode
TEXTURE_WRAP_MIRROR_CLAMP // Mirrors and clamps to border the texture in tiled mode
} TextureWrap;
// Color blending modes (pre-defined)
typedef enum {
BLEND_ALPHA = 0, // Blend textures considering alpha (default)
BLEND_ADDITIVE, // Blend textures adding colors
BLEND_MULTIPLIED, // Blend textures multiplying colors
BLEND_ADD_COLORS, // Blend textures adding colors (alternative)
BLEND_SUBTRACT_COLORS, // Blend textures subtracting colors (alternative)
BLEND_CUSTOM // Belnd textures using custom src/dst factors (use SetBlendModeCustom())
} BlendMode;
// Shader location point type
typedef enum {
SHADER_LOC_VERTEX_POSITION = 0,
SHADER_LOC_VERTEX_TEXCOORD01,
SHADER_LOC_VERTEX_TEXCOORD02,
SHADER_LOC_VERTEX_NORMAL,
SHADER_LOC_VERTEX_TANGENT,
SHADER_LOC_VERTEX_COLOR,
SHADER_LOC_MATRIX_MVP,
SHADER_LOC_MATRIX_MODEL,
SHADER_LOC_MATRIX_VIEW,
SHADER_LOC_MATRIX_NORMAL,
SHADER_LOC_MATRIX_PROJECTION,
SHADER_LOC_VECTOR_VIEW,
SHADER_LOC_COLOR_DIFFUSE,
SHADER_LOC_COLOR_SPECULAR,
SHADER_LOC_COLOR_AMBIENT,
SHADER_LOC_MAP_ALBEDO, // SHADER_LOC_MAP_DIFFUSE
SHADER_LOC_MAP_METALNESS, // SHADER_LOC_MAP_SPECULAR
SHADER_LOC_MAP_NORMAL,
SHADER_LOC_MAP_ROUGHNESS,
SHADER_LOC_MAP_OCCLUSION,
SHADER_LOC_MAP_EMISSION,
SHADER_LOC_MAP_HEIGHT,
SHADER_LOC_MAP_CUBEMAP,
SHADER_LOC_MAP_IRRADIANCE,
SHADER_LOC_MAP_PREFILTER,
SHADER_LOC_MAP_BRDF
} ShaderLocationIndex;
#define SHADER_LOC_MAP_DIFFUSE SHADER_LOC_MAP_ALBEDO
#define SHADER_LOC_MAP_SPECULAR SHADER_LOC_MAP_METALNESS
// Shader uniform data types
typedef enum {
SHADER_UNIFORM_FLOAT = 0,
SHADER_UNIFORM_VEC2,
SHADER_UNIFORM_VEC3,
SHADER_UNIFORM_VEC4,
SHADER_UNIFORM_INT,
SHADER_UNIFORM_IVEC2,
SHADER_UNIFORM_IVEC3,
SHADER_UNIFORM_IVEC4,
SHADER_UNIFORM_SAMPLER2D
} ShaderUniformDataType;
#endif
#if defined(__cplusplus)
extern "C" { // Prevents name mangling of functions
#endif
//------------------------------------------------------------------------------------
// Functions Declaration - Matrix operations
//------------------------------------------------------------------------------------
RLAPI void rlMatrixMode(int mode); // Choose the current matrix to be transformed
RLAPI void rlPushMatrix(void); // Push the current matrix to stack
RLAPI void rlPopMatrix(void); // Pop lattest inserted matrix from stack
RLAPI void rlLoadIdentity(void); // Reset current matrix to identity matrix
RLAPI void rlTranslatef(float x, float y, float z); // Multiply the current matrix by a translation matrix
RLAPI void rlRotatef(float angleDeg, float x, float y, float z); // Multiply the current matrix by a rotation matrix
RLAPI void rlScalef(float x, float y, float z); // Multiply the current matrix by a scaling matrix
RLAPI void rlMultMatrixf(float *matf); // Multiply the current matrix by another matrix
RLAPI void rlFrustum(double left, double right, double bottom, double top, double znear, double zfar);
RLAPI void rlOrtho(double left, double right, double bottom, double top, double znear, double zfar);
RLAPI void rlViewport(int x, int y, int width, int height); // Set the viewport area
//------------------------------------------------------------------------------------
// Functions Declaration - Vertex level operations
//------------------------------------------------------------------------------------
RLAPI void rlBegin(int mode); // Initialize drawing mode (how to organize vertex)
RLAPI void rlEnd(void); // Finish vertex providing
RLAPI void rlVertex2i(int x, int y); // Define one vertex (position) - 2 int
RLAPI void rlVertex2f(float x, float y); // Define one vertex (position) - 2 float
RLAPI void rlVertex3f(float x, float y, float z); // Define one vertex (position) - 3 float
RLAPI void rlTexCoord2f(float x, float y); // Define one vertex (texture coordinate) - 2 float
RLAPI void rlNormal3f(float x, float y, float z); // Define one vertex (normal) - 3 float
RLAPI void rlColor4ub(unsigned char r, unsigned char g, unsigned char b, unsigned char a); // Define one vertex (color) - 4 byte
RLAPI void rlColor3f(float x, float y, float z); // Define one vertex (color) - 3 float
RLAPI void rlColor4f(float x, float y, float z, float w); // Define one vertex (color) - 4 float
//------------------------------------------------------------------------------------
// Functions Declaration - OpenGL style functions (common to 1.1, 3.3+, ES2)
// NOTE: This functions are used to completely abstract raylib code from OpenGL layer,
// some of them are direct wrappers over OpenGL calls, some others are custom
//------------------------------------------------------------------------------------
// Vertex buffers state
RLAPI bool rlEnableVertexArray(unsigned int vaoId); // Enable vertex array (VAO, if supported)
RLAPI void rlDisableVertexArray(void); // Disable vertex array (VAO, if supported)
RLAPI void rlEnableVertexBuffer(unsigned int id); // Enable vertex buffer (VBO)
RLAPI void rlDisableVertexBuffer(void); // Disable vertex buffer (VBO)
RLAPI void rlEnableVertexBufferElement(unsigned int id);// Enable vertex buffer element (VBO element)
RLAPI void rlDisableVertexBufferElement(void); // Disable vertex buffer element (VBO element)
RLAPI void rlEnableVertexAttribute(unsigned int index); // Enable vertex attribute index
RLAPI void rlDisableVertexAttribute(unsigned int index);// Disable vertex attribute index
#if defined(GRAPHICS_API_OPENGL_11)
RLAPI void rlEnableStatePointer(int vertexAttribType, void *buffer);
RLAPI void rlDisableStatePointer(int vertexAttribType);
#endif
// Textures state
RLAPI void rlActiveTextureSlot(int slot); // Select and active a texture slot
RLAPI void rlEnableTexture(unsigned int id); // Enable texture
RLAPI void rlDisableTexture(void); // Disable texture
RLAPI void rlEnableTextureCubemap(unsigned int id); // Enable texture cubemap
RLAPI void rlDisableTextureCubemap(void); // Disable texture cubemap
RLAPI void rlTextureParameters(unsigned int id, int param, int value); // Set texture parameters (filter, wrap)
// Shader state
RLAPI void rlEnableShader(unsigned int id); // Enable shader program
RLAPI void rlDisableShader(void); // Disable shader program
// Framebuffer state
RLAPI void rlEnableFramebuffer(unsigned int id); // Enable render texture (fbo)
RLAPI void rlDisableFramebuffer(void); // Disable render texture (fbo), return to default framebuffer
// General render state
RLAPI void rlEnableDepthTest(void); // Enable depth test
RLAPI void rlDisableDepthTest(void); // Disable depth test
RLAPI void rlEnableDepthMask(void); // Enable depth write
RLAPI void rlDisableDepthMask(void); // Disable depth write
RLAPI void rlEnableBackfaceCulling(void); // Enable backface culling
RLAPI void rlDisableBackfaceCulling(void); // Disable backface culling
RLAPI void rlEnableScissorTest(void); // Enable scissor test
RLAPI void rlDisableScissorTest(void); // Disable scissor test
RLAPI void rlScissor(int x, int y, int width, int height); // Scissor test
RLAPI void rlEnableWireMode(void); // Enable wire mode
RLAPI void rlDisableWireMode(void); // Disable wire mode
RLAPI void rlSetLineWidth(float width); // Set the line drawing width
RLAPI float rlGetLineWidth(void); // Get the line drawing width
RLAPI void rlEnableSmoothLines(void); // Enable line aliasing
RLAPI void rlDisableSmoothLines(void); // Disable line aliasing
RLAPI void rlEnableStereoRender(void); // Enable stereo rendering
RLAPI void rlDisableStereoRender(void); // Disable stereo rendering
RLAPI bool rlIsStereoRenderEnabled(void); // Check if stereo render is enabled
RLAPI void rlClearColor(unsigned char r, unsigned char g, unsigned char b, unsigned char a); // Clear color buffer with color
RLAPI void rlClearScreenBuffers(void); // Clear used screen buffers (color and depth)
RLAPI void rlCheckErrors(void); // Check and log OpenGL error codes
RLAPI void rlSetBlendMode(int mode); // Set blending mode
RLAPI void rlSetBlendFactors(int glSrcFactor, int glDstFactor, int glEquation); // Set blending mode factor and equation (using OpenGL factors)
//------------------------------------------------------------------------------------
// Functions Declaration - rlgl functionality
//------------------------------------------------------------------------------------
// rlgl initialization functions
RLAPI void rlglInit(int width, int height); // Initialize rlgl (buffers, shaders, textures, states)
RLAPI void rlglClose(void); // De-inititialize rlgl (buffers, shaders, textures)
RLAPI void rlLoadExtensions(void *loader); // Load OpenGL extensions (loader function required)
RLAPI int rlGetVersion(void); // Returns current OpenGL version
RLAPI int rlGetFramebufferWidth(void); // Get default framebuffer width
RLAPI int rlGetFramebufferHeight(void); // Get default framebuffer height
RLAPI Shader rlGetShaderDefault(void); // Get default shader
RLAPI Texture2D rlGetTextureDefault(void); // Get default texture
// Render batch management
// NOTE: rlgl provides a default render batch to behave like OpenGL 1.1 immediate mode
// but this render batch API is exposed in case of custom batches are required
RLAPI RenderBatch rlLoadRenderBatch(int numBuffers, int bufferElements); // Load a render batch system
RLAPI void rlUnloadRenderBatch(RenderBatch batch); // Unload render batch system
RLAPI void rlDrawRenderBatch(RenderBatch *batch); // Draw render batch data (Update->Draw->Reset)
RLAPI void rlSetRenderBatchActive(RenderBatch *batch); // Set the active render batch for rlgl (NULL for default internal)
RLAPI void rlDrawRenderBatchActive(void); // Update and draw internal render batch
RLAPI bool rlCheckRenderBatchLimit(int vCount); // Check internal buffer overflow for a given number of vertex
RLAPI void rlSetTexture(unsigned int id); // Set current texture for render batch and check buffers limits
//------------------------------------------------------------------------------------------------------------------------
// Vertex buffers management
RLAPI unsigned int rlLoadVertexArray(void); // Load vertex array (vao) if supported
RLAPI unsigned int rlLoadVertexBuffer(void *buffer, int size, bool dynamic); // Load a vertex buffer attribute
RLAPI unsigned int rlLoadVertexBufferElement(void *buffer, int size, bool dynamic); // Load a new attributes element buffer
RLAPI void rlUpdateVertexBuffer(int bufferId, void *data, int dataSize, int offset); // Update GPU buffer with new data
RLAPI void rlUnloadVertexArray(unsigned int vaoId);
RLAPI void rlUnloadVertexBuffer(unsigned int vboId);
RLAPI void rlSetVertexAttribute(unsigned int index, int compSize, int type, bool normalized, int stride, void *pointer);
RLAPI void rlSetVertexAttributeDivisor(unsigned int index, int divisor);
RLAPI void rlSetVertexAttributeDefault(int locIndex, const void *value, int attribType, int count); // Set vertex attribute default value
RLAPI void rlDrawVertexArray(int offset, int count);
RLAPI void rlDrawVertexArrayElements(int offset, int count, void *buffer);
RLAPI void rlDrawVertexArrayInstanced(int offset, int count, int instances);
RLAPI void rlDrawVertexArrayElementsInstanced(int offset, int count, void *buffer, int instances);
// Textures management
RLAPI unsigned int rlLoadTexture(void *data, int width, int height, int format, int mipmapCount); // Load texture in GPU
RLAPI unsigned int rlLoadTextureDepth(int width, int height, bool useRenderBuffer); // Load depth texture/renderbuffer (to be attached to fbo)
RLAPI unsigned int rlLoadTextureCubemap(void *data, int size, int format); // Load texture cubemap
RLAPI void rlUpdateTexture(unsigned int id, int offsetX, int offsetY, int width, int height, int format, const void *data); // Update GPU texture with new data
RLAPI void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned int *glFormat, unsigned int *glType); // Get OpenGL internal formats
RLAPI void rlUnloadTexture(unsigned int id); // Unload texture from GPU memory
RLAPI void rlGenerateMipmaps(Texture2D *texture); // Generate mipmap data for selected texture
RLAPI void *rlReadTexturePixels(Texture2D texture); // Read texture pixel data
RLAPI unsigned char *rlReadScreenPixels(int width, int height); // Read screen pixel data (color buffer)
// Framebuffer management (fbo)
RLAPI unsigned int rlLoadFramebuffer(int width, int height); // Load an empty framebuffer
RLAPI void rlFramebufferAttach(unsigned int fboId, unsigned int texId, int attachType, int texType, int mipLevel); // Attach texture/renderbuffer to a framebuffer
RLAPI bool rlFramebufferComplete(unsigned int id); // Verify framebuffer is complete
RLAPI void rlUnloadFramebuffer(unsigned int id); // Delete framebuffer from GPU
// Shaders management
RLAPI unsigned int rlLoadShaderCode(const char *vsCode, const char *fsCode); // Load shader from code strings
RLAPI unsigned int rlCompileShader(const char *shaderCode, int type); // Compile custom shader and return shader id (type: GL_VERTEX_SHADER, GL_FRAGMENT_SHADER)
RLAPI unsigned int rlLoadShaderProgram(unsigned int vShaderId, unsigned int fShaderId); // Load custom shader program
RLAPI void rlUnloadShaderProgram(unsigned int id); // Unload shader program
RLAPI int rlGetLocationUniform(unsigned int shaderId, const char *uniformName); // Get shader location uniform
RLAPI int rlGetLocationAttrib(unsigned int shaderId, const char *attribName); // Get shader location attribute
RLAPI void rlSetUniform(int locIndex, const void *value, int uniformType, int count); // Set shader value uniform
RLAPI void rlSetUniformMatrix(int locIndex, Matrix mat); // Set shader value matrix
RLAPI void rlSetUniformSampler(int locIndex, unsigned int textureId); // Set shader value sampler
RLAPI void rlSetShader(Shader shader); // Set shader currently active
// Matrix state management
RLAPI Matrix rlGetMatrixModelview(void); // Get internal modelview matrix
RLAPI Matrix rlGetMatrixProjection(void); // Get internal projection matrix
RLAPI Matrix rlGetMatrixTransform(void); // Get internal accumulated transform matrix
RLAPI Matrix rlGetMatrixProjectionStereo(int eye); // Get internal projection matrix for stereo render (selected eye)
RLAPI Matrix rlGetMatrixViewOffsetStereo(int eye); // Get internal view offset matrix for stereo render (selected eye)
RLAPI void rlSetMatrixProjection(Matrix proj); // Set a custom projection matrix (replaces internal projection matrix)
RLAPI void rlSetMatrixModelview(Matrix view); // Set a custom modelview matrix (replaces internal modelview matrix)
RLAPI void rlSetMatrixProjectionStereo(Matrix right, Matrix left); // Set eyes projection matrices for stereo rendering
RLAPI void rlSetMatrixViewOffsetStereo(Matrix right, Matrix left); // Set eyes view offsets matrices for stereo rendering
// Quick and dirty cube/quad buffers load->draw->unload
RLAPI void rlLoadDrawCube(void); // Load and draw a cube
RLAPI void rlLoadDrawQuad(void); // Load and draw a quad
#if defined(__cplusplus)
}
#endif
#endif // RLGL_H
/***********************************************************************************
*
* RLGL IMPLEMENTATION
*
************************************************************************************/
#if defined(RLGL_IMPLEMENTATION)
#if !defined(RLGL_STANDALONE)
// Check if config flags have been externally provided on compilation line
#if !defined(EXTERNAL_CONFIG_FLAGS)
#include "config.h" // Defines module configuration flags
#endif
#include "raymath.h" // Required for: Vector3 and Matrix functions
#endif
#include <stdlib.h> // Required for: malloc(), free()
#include <string.h> // Required for: strcmp(), strlen() [Used in rlglInit(), on extensions loading]
#if defined(GRAPHICS_API_OPENGL_11)
#if defined(__APPLE__)
#include <OpenGL/gl.h> // OpenGL 1.1 library for OSX
#include <OpenGL/glext.h>
#else
// APIENTRY for OpenGL function pointer declarations is required
#ifndef APIENTRY
#if defined(_WIN32)
#define APIENTRY __stdcall
#else
#define APIENTRY
#endif
#endif
// WINGDIAPI definition. Some Windows OpenGL headers need it
#if !defined(WINGDIAPI) && defined(_WIN32)
#define WINGDIAPI __declspec(dllimport)
#endif
#include <GL/gl.h> // OpenGL 1.1 library
#endif
#endif
#if defined(GRAPHICS_API_OPENGL_33)
#if defined(__APPLE__)
#include <OpenGL/gl3.h> // OpenGL 3 library for OSX
#include <OpenGL/gl3ext.h> // OpenGL 3 extensions library for OSX
#else
#define GLAD_REALLOC RL_REALLOC
#define GLAD_FREE RL_FREE
#define GLAD_IMPLEMENTATION
#if defined(RLGL_STANDALONE)
#include "glad.h" // GLAD extensions loading library, includes OpenGL headers
#else
#include "external/glad.h" // GLAD extensions loading library, includes OpenGL headers
#endif
#endif
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
#define GL_GLEXT_PROTOTYPES
//#include <EGL/egl.h> // EGL library -> not required, platform layer
#include <GLES2/gl2.h> // OpenGL ES 2.0 library
#include <GLES2/gl2ext.h> // OpenGL ES 2.0 extensions library
// It seems OpenGL ES 2.0 instancing entry points are not defined on Raspberry Pi
// provided headers (despite being defined in official Khronos GLES2 headers)
#if defined(PLATFORM_RPI) || defined(PLATFORM_DRM)
typedef void (GL_APIENTRYP PFNGLDRAWARRAYSINSTANCEDEXTPROC) (GLenum mode, GLint start, GLsizei count, GLsizei primcount);
typedef void (GL_APIENTRYP PFNGLDRAWELEMENTSINSTANCEDEXTPROC) (GLenum mode, GLsizei count, GLenum type, const void *indices, GLsizei primcount);
typedef void (GL_APIENTRYP PFNGLVERTEXATTRIBDIVISOREXTPROC) (GLuint index, GLuint divisor);
#endif
#endif
//----------------------------------------------------------------------------------
// Defines and Macros
//----------------------------------------------------------------------------------
#ifndef GL_SHADING_LANGUAGE_VERSION
#define GL_SHADING_LANGUAGE_VERSION 0x8B8C
#endif
#ifndef GL_COMPRESSED_RGB_S3TC_DXT1_EXT
#define GL_COMPRESSED_RGB_S3TC_DXT1_EXT 0x83F0
#endif
#ifndef GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
#define GL_COMPRESSED_RGBA_S3TC_DXT1_EXT 0x83F1
#endif
#ifndef GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
#define GL_COMPRESSED_RGBA_S3TC_DXT3_EXT 0x83F2
#endif
#ifndef GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
#define GL_COMPRESSED_RGBA_S3TC_DXT5_EXT 0x83F3
#endif
#ifndef GL_ETC1_RGB8_OES
#define GL_ETC1_RGB8_OES 0x8D64
#endif
#ifndef GL_COMPRESSED_RGB8_ETC2
#define GL_COMPRESSED_RGB8_ETC2 0x9274
#endif
#ifndef GL_COMPRESSED_RGBA8_ETC2_EAC
#define GL_COMPRESSED_RGBA8_ETC2_EAC 0x9278
#endif
#ifndef GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG
#define GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG 0x8C00
#endif
#ifndef GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG
#define GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG 0x8C02
#endif
#ifndef GL_COMPRESSED_RGBA_ASTC_4x4_KHR
#define GL_COMPRESSED_RGBA_ASTC_4x4_KHR 0x93b0
#endif
#ifndef GL_COMPRESSED_RGBA_ASTC_8x8_KHR
#define GL_COMPRESSED_RGBA_ASTC_8x8_KHR 0x93b7
#endif
#ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT
#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
#endif
#ifndef GL_TEXTURE_MAX_ANISOTROPY_EXT
#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
#endif
#define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364
#if defined(GRAPHICS_API_OPENGL_11)
#define GL_UNSIGNED_SHORT_5_6_5 0x8363
//#define GL_UNSIGNED_SHORT_5_6_5_REV 0x8364
#define GL_UNSIGNED_SHORT_5_5_5_1 0x8034
#define GL_UNSIGNED_SHORT_4_4_4_4 0x8033
#endif
#if defined(GRAPHICS_API_OPENGL_21)
#define GL_LUMINANCE 0x1909
#define GL_LUMINANCE_ALPHA 0x190A
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
#define glClearDepth glClearDepthf
#define GL_READ_FRAMEBUFFER GL_FRAMEBUFFER
#define GL_DRAW_FRAMEBUFFER GL_FRAMEBUFFER
#endif
// Default shader vertex attribute names to set location points
#ifndef DEFAULT_SHADER_ATTRIB_NAME_POSITION
#define DEFAULT_SHADER_ATTRIB_NAME_POSITION "vertexPosition" // Binded by default to shader location: 0
#endif
#ifndef DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD
#define DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD "vertexTexCoord" // Binded by default to shader location: 1
#endif
#ifndef DEFAULT_SHADER_ATTRIB_NAME_NORMAL
#define DEFAULT_SHADER_ATTRIB_NAME_NORMAL "vertexNormal" // Binded by default to shader location: 2
#endif
#ifndef DEFAULT_SHADER_ATTRIB_NAME_COLOR
#define DEFAULT_SHADER_ATTRIB_NAME_COLOR "vertexColor" // Binded by default to shader location: 3
#endif
#ifndef DEFAULT_SHADER_ATTRIB_NAME_TANGENT
#define DEFAULT_SHADER_ATTRIB_NAME_TANGENT "vertexTangent" // Binded by default to shader location: 4
#endif
#ifndef DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD2
#define DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD2 "vertexTexCoord2" // Binded by default to shader location: 5
#endif
//----------------------------------------------------------------------------------
// Types and Structures Definition
//----------------------------------------------------------------------------------
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
typedef struct rlglData {
RenderBatch *currentBatch; // Current render batch
RenderBatch defaultBatch; // Default internal render batch
struct {
int currentMatrixMode; // Current matrix mode
Matrix *currentMatrix; // Current matrix pointer
Matrix modelview; // Default modelview matrix
Matrix projection; // Default projection matrix
Matrix transform; // Transform matrix to be used with rlTranslate, rlRotate, rlScale
bool transformRequired; // Require transform matrix application to current draw-call vertex (if required)
Matrix stack[MAX_MATRIX_STACK_SIZE];// Matrix stack for push/pop
int stackCounter; // Matrix stack counter
unsigned int defaultTextureId; // Default texture used on shapes/poly drawing (required by shader)
unsigned int activeTextureId[MAX_BATCH_ACTIVE_TEXTURES]; // Active texture ids to be enabled on batch drawing (0 active by default)
unsigned int defaultVShaderId; // Default vertex shader id (used by default shader program)
unsigned int defaultFShaderId; // Default fragment shader Id (used by default shader program)
Shader defaultShader; // Basic shader, support vertex color and diffuse texture
Shader currentShader; // Shader to be used on rendering (by default, defaultShader)
bool stereoRender; // Stereo rendering flag
Matrix projectionStereo[2]; // VR stereo rendering eyes projection matrices
Matrix viewOffsetStereo[2]; // VR stereo rendering eyes view offset matrices
int currentBlendMode; // Blending mode active
int glBlendSrcFactor; // Blending source factor
int glBlendDstFactor; // Blending destination factor
int glBlendEquation; // Blending equation
int framebufferWidth; // Default framebuffer width
int framebufferHeight; // Default framebuffer height
} State; // Renderer state
struct {
bool vao; // VAO support (OpenGL ES2 could not support VAO extension) (GL_ARB_vertex_array_object)
bool instancing; // Instancing supported (GL_ANGLE_instanced_arrays, GL_EXT_draw_instanced + GL_EXT_instanced_arrays)
bool texNPOT; // NPOT textures full support (GL_ARB_texture_non_power_of_two, GL_OES_texture_npot)
bool texDepth; // Depth textures supported (GL_ARB_depth_texture, GL_WEBGL_depth_texture, GL_OES_depth_texture)
bool texFloat32; // float textures support (32 bit per channel) (GL_OES_texture_float)
bool texCompDXT; // DDS texture compression support (GL_EXT_texture_compression_s3tc, GL_WEBGL_compressed_texture_s3tc, GL_WEBKIT_WEBGL_compressed_texture_s3tc)
bool texCompETC1; // ETC1 texture compression support (GL_OES_compressed_ETC1_RGB8_texture, GL_WEBGL_compressed_texture_etc1)
bool texCompETC2; // ETC2/EAC texture compression support (GL_ARB_ES3_compatibility)
bool texCompPVRT; // PVR texture compression support (GL_IMG_texture_compression_pvrtc)
bool texCompASTC; // ASTC texture compression support (GL_KHR_texture_compression_astc_hdr, GL_KHR_texture_compression_astc_ldr)
bool texMirrorClamp; // Clamp mirror wrap mode supported (GL_EXT_texture_mirror_clamp)
bool texAnisoFilter; // Anisotropic texture filtering support (GL_EXT_texture_filter_anisotropic)
float maxAnisotropyLevel; // Maximum anisotropy level supported (minimum is 2.0f)
int maxDepthBits; // Maximum bits for depth component
} ExtSupported; // Extensions supported flags
} rlglData;
typedef void *(*rlglLoadProc)(const char *name); // OpenGL extension functions loader signature (same as GLADloadproc)
#endif // GRAPHICS_API_OPENGL_33 || GRAPHICS_API_OPENGL_ES2
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
static rlglData RLGL = { 0 };
#endif // GRAPHICS_API_OPENGL_33 || GRAPHICS_API_OPENGL_ES2
#if defined(GRAPHICS_API_OPENGL_ES2)
// NOTE: VAO functionality is exposed through extensions (OES)
static PFNGLGENVERTEXARRAYSOESPROC glGenVertexArrays = NULL;
static PFNGLBINDVERTEXARRAYOESPROC glBindVertexArray = NULL;
static PFNGLDELETEVERTEXARRAYSOESPROC glDeleteVertexArrays = NULL;
// NOTE: Instancing functionality could also be available through extension
static PFNGLDRAWARRAYSINSTANCEDEXTPROC glDrawArraysInstanced = NULL;
static PFNGLDRAWELEMENTSINSTANCEDEXTPROC glDrawElementsInstanced = NULL;
static PFNGLVERTEXATTRIBDIVISOREXTPROC glVertexAttribDivisor = NULL;
#endif
//----------------------------------------------------------------------------------
// Module specific Functions Declaration
//----------------------------------------------------------------------------------
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
static void rlLoadShaderDefault(void); // Load default shader (RLGL.State.defaultShader)
static void rlUnloadShaderDefault(void); // Unload default shader (RLGL.State.defaultShader)
#if defined(SUPPORT_GL_DETAILS_INFO)
static char *rlGetCompressedFormatName(int format); // Get compressed format official GL identifier name
#endif // SUPPORT_GL_DETAILS_INFO
#endif // GRAPHICS_API_OPENGL_33 || GRAPHICS_API_OPENGL_ES2
#if defined(GRAPHICS_API_OPENGL_11)
static int rlGenerateMipmapsData(unsigned char *data, int baseWidth, int baseHeight); // Generate mipmaps data on CPU side
static Color *rlGenNextMipmapData(Color *srcData, int srcWidth, int srcHeight); // Generate next mipmap level on CPU side
#endif
static int rlGetPixelDataSize(int width, int height, int format); // Get pixel data size in bytes (image or texture)
//----------------------------------------------------------------------------------
// Module Functions Definition - Matrix operations
//----------------------------------------------------------------------------------
#if defined(GRAPHICS_API_OPENGL_11)
// Fallback to OpenGL 1.1 function calls
//---------------------------------------
void rlMatrixMode(int mode)
{
switch (mode)
{
case RL_PROJECTION: glMatrixMode(GL_PROJECTION); break;
case RL_MODELVIEW: glMatrixMode(GL_MODELVIEW); break;
case RL_TEXTURE: glMatrixMode(GL_TEXTURE); break;
default: break;
}
}
void rlFrustum(double left, double right, double bottom, double top, double znear, double zfar)
{
glFrustum(left, right, bottom, top, znear, zfar);
}
void rlOrtho(double left, double right, double bottom, double top, double znear, double zfar)
{
glOrtho(left, right, bottom, top, znear, zfar);
}
void rlPushMatrix(void) { glPushMatrix(); }
void rlPopMatrix(void) { glPopMatrix(); }
void rlLoadIdentity(void) { glLoadIdentity(); }
void rlTranslatef(float x, float y, float z) { glTranslatef(x, y, z); }
void rlRotatef(float angleDeg, float x, float y, float z) { glRotatef(angleDeg, x, y, z); }
void rlScalef(float x, float y, float z) { glScalef(x, y, z); }
void rlMultMatrixf(float *matf) { glMultMatrixf(matf); }
#endif
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Choose the current matrix to be transformed
void rlMatrixMode(int mode)
{
if (mode == RL_PROJECTION) RLGL.State.currentMatrix = &RLGL.State.projection;
else if (mode == RL_MODELVIEW) RLGL.State.currentMatrix = &RLGL.State.modelview;
//else if (mode == RL_TEXTURE) // Not supported
RLGL.State.currentMatrixMode = mode;
}
// Push the current matrix into RLGL.State.stack
void rlPushMatrix(void)
{
if (RLGL.State.stackCounter >= MAX_MATRIX_STACK_SIZE) TRACELOG(LOG_ERROR, "RLGL: Matrix stack overflow (MAX_MATRIX_STACK_SIZE)");
if (RLGL.State.currentMatrixMode == RL_MODELVIEW)
{
RLGL.State.transformRequired = true;
RLGL.State.currentMatrix = &RLGL.State.transform;
}
RLGL.State.stack[RLGL.State.stackCounter] = *RLGL.State.currentMatrix;
RLGL.State.stackCounter++;
}
// Pop lattest inserted matrix from RLGL.State.stack
void rlPopMatrix(void)
{
if (RLGL.State.stackCounter > 0)
{
Matrix mat = RLGL.State.stack[RLGL.State.stackCounter - 1];
*RLGL.State.currentMatrix = mat;
RLGL.State.stackCounter--;
}
if ((RLGL.State.stackCounter == 0) && (RLGL.State.currentMatrixMode == RL_MODELVIEW))
{
RLGL.State.currentMatrix = &RLGL.State.modelview;
RLGL.State.transformRequired = false;
}
}
// Reset current matrix to identity matrix
void rlLoadIdentity(void)
{
*RLGL.State.currentMatrix = MatrixIdentity();
}
// Multiply the current matrix by a translation matrix
void rlTranslatef(float x, float y, float z)
{
Matrix matTranslation = MatrixTranslate(x, y, z);
// NOTE: We transpose matrix with multiplication order
*RLGL.State.currentMatrix = MatrixMultiply(matTranslation, *RLGL.State.currentMatrix);
}
// Multiply the current matrix by a rotation matrix
void rlRotatef(float angleDeg, float x, float y, float z)
{
Matrix matRotation = MatrixIdentity();
Vector3 axis = (Vector3){ x, y, z };
matRotation = MatrixRotate(Vector3Normalize(axis), angleDeg*DEG2RAD);
// NOTE: We transpose matrix with multiplication order
*RLGL.State.currentMatrix = MatrixMultiply(matRotation, *RLGL.State.currentMatrix);
}
// Multiply the current matrix by a scaling matrix
void rlScalef(float x, float y, float z)
{
Matrix matScale = MatrixScale(x, y, z);
// NOTE: We transpose matrix with multiplication order
*RLGL.State.currentMatrix = MatrixMultiply(matScale, *RLGL.State.currentMatrix);
}
// Multiply the current matrix by another matrix
void rlMultMatrixf(float *matf)
{
// Matrix creation from array
Matrix mat = { matf[0], matf[4], matf[8], matf[12],
matf[1], matf[5], matf[9], matf[13],
matf[2], matf[6], matf[10], matf[14],
matf[3], matf[7], matf[11], matf[15] };
*RLGL.State.currentMatrix = MatrixMultiply(*RLGL.State.currentMatrix, mat);
}
// Multiply the current matrix by a perspective matrix generated by parameters
void rlFrustum(double left, double right, double bottom, double top, double znear, double zfar)
{
Matrix matPerps = MatrixFrustum(left, right, bottom, top, znear, zfar);
*RLGL.State.currentMatrix = MatrixMultiply(*RLGL.State.currentMatrix, matPerps);
}
// Multiply the current matrix by an orthographic matrix generated by parameters
void rlOrtho(double left, double right, double bottom, double top, double znear, double zfar)
{
// NOTE: If left-right and top-botton values are equal it could create
// a division by zero on MatrixOrtho(), response to it is platform/compiler dependant
Matrix matOrtho = MatrixOrtho(left, right, bottom, top, znear, zfar);
*RLGL.State.currentMatrix = MatrixMultiply(*RLGL.State.currentMatrix, matOrtho);
}
#endif
// Set the viewport area (transformation from normalized device coordinates to window coordinates)
void rlViewport(int x, int y, int width, int height)
{
glViewport(x, y, width, height);
}
//----------------------------------------------------------------------------------
// Module Functions Definition - Vertex level operations
//----------------------------------------------------------------------------------
#if defined(GRAPHICS_API_OPENGL_11)
// Fallback to OpenGL 1.1 function calls
//---------------------------------------
void rlBegin(int mode)
{
switch (mode)
{
case RL_LINES: glBegin(GL_LINES); break;
case RL_TRIANGLES: glBegin(GL_TRIANGLES); break;
case RL_QUADS: glBegin(GL_QUADS); break;
default: break;
}
}
void rlEnd() { glEnd(); }
void rlVertex2i(int x, int y) { glVertex2i(x, y); }
void rlVertex2f(float x, float y) { glVertex2f(x, y); }
void rlVertex3f(float x, float y, float z) { glVertex3f(x, y, z); }
void rlTexCoord2f(float x, float y) { glTexCoord2f(x, y); }
void rlNormal3f(float x, float y, float z) { glNormal3f(x, y, z); }
void rlColor4ub(unsigned char r, unsigned char g, unsigned char b, unsigned char a) { glColor4ub(r, g, b, a); }
void rlColor3f(float x, float y, float z) { glColor3f(x, y, z); }
void rlColor4f(float x, float y, float z, float w) { glColor4f(x, y, z, w); }
#endif
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Initialize drawing mode (how to organize vertex)
void rlBegin(int mode)
{
// Draw mode can be RL_LINES, RL_TRIANGLES and RL_QUADS
// NOTE: In all three cases, vertex are accumulated over default internal vertex buffer
if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].mode != mode)
{
if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount > 0)
{
// Make sure current RLGL.currentBatch->draws[i].vertexCount is aligned a multiple of 4,
// that way, following QUADS drawing will keep aligned with index processing
// It implies adding some extra alignment vertex at the end of the draw,
// those vertex are not processed but they are considered as an additional offset
// for the next set of vertex to be drawn
if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].mode == RL_LINES) RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment = ((RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount < 4)? RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount : RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount%4);
else if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].mode == RL_TRIANGLES) RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment = ((RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount < 4)? 1 : (4 - (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount%4)));
else RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment = 0;
if (!rlCheckRenderBatchLimit(RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment))
{
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter += RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter += RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter += RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment;
RLGL.currentBatch->drawsCounter++;
}
}
if (RLGL.currentBatch->drawsCounter >= DEFAULT_BATCH_DRAWCALLS) rlDrawRenderBatch(RLGL.currentBatch);
RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].mode = mode;
RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount = 0;
RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].textureId = RLGL.State.defaultTextureId;
}
}
// Finish vertex providing
void rlEnd(void)
{
// Make sure vertexCount is the same for vertices, texcoords, colors and normals
// NOTE: In OpenGL 1.1, one glColor call can be made for all the subsequent glVertex calls
// Make sure colors count match vertex count
if (RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter != RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter)
{
int addColors = RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter - RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter;
for (int i = 0; i < addColors; i++)
{
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter] = RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter - 4];
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter + 1] = RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter - 3];
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter + 2] = RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter - 2];
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter + 3] = RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter - 1];
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter++;
}
}
// Make sure texcoords count match vertex count
if (RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter != RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter)
{
int addTexCoords = RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter - RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter;
for (int i = 0; i < addTexCoords; i++)
{
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].texcoords[2*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter] = 0.0f;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].texcoords[2*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter + 1] = 0.0f;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter++;
}
}
// TODO: Make sure normals count match vertex count... if normals support is added in a future... :P
// NOTE: Depth increment is dependant on rlOrtho(): z-near and z-far values,
// as well as depth buffer bit-depth (16bit or 24bit or 32bit)
// Correct increment formula would be: depthInc = (zfar - znear)/pow(2, bits)
RLGL.currentBatch->currentDepth += (1.0f/20000.0f);
// Verify internal buffers limits
// NOTE: This check is combined with usage of rlCheckRenderBatchLimit()
if ((RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter) >=
(RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].elementsCount*4 - 4))
{
// WARNING: If we are between rlPushMatrix() and rlPopMatrix() and we need to force a rlDrawRenderBatch(),
// we need to call rlPopMatrix() before to recover *RLGL.State.currentMatrix (RLGL.State.modelview) for the next forced draw call!
// If we have multiple matrix pushed, it will require "RLGL.State.stackCounter" pops before launching the draw
for (int i = RLGL.State.stackCounter; i >= 0; i--) rlPopMatrix();
rlDrawRenderBatch(RLGL.currentBatch);
}
}
// Define one vertex (position)
// NOTE: Vertex position data is the basic information required for drawing
void rlVertex3f(float x, float y, float z)
{
Vector3 vec = { x, y, z };
// Transform provided vector if required
if (RLGL.State.transformRequired) vec = Vector3Transform(vec, RLGL.State.transform);
// Verify that current vertex buffer elements limit has not been reached
if (RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter < (RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].elementsCount*4))
{
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vertices[3*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter] = vec.x;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vertices[3*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter + 1] = vec.y;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vertices[3*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter + 2] = vec.z;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter++;
RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount++;
}
else TRACELOG(LOG_ERROR, "RLGL: Batch elements overflow");
}
// Define one vertex (position)
void rlVertex2f(float x, float y)
{
rlVertex3f(x, y, RLGL.currentBatch->currentDepth);
}
// Define one vertex (position)
void rlVertex2i(int x, int y)
{
rlVertex3f((float)x, (float)y, RLGL.currentBatch->currentDepth);
}
// Define one vertex (texture coordinate)
// NOTE: Texture coordinates are limited to QUADS only
void rlTexCoord2f(float x, float y)
{
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].texcoords[2*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter] = x;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].texcoords[2*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter + 1] = y;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter++;
}
// Define one vertex (normal)
// NOTE: Normals limited to TRIANGLES only?
void rlNormal3f(float x, float y, float z)
{
// TODO: Normals usage...
}
// Define one vertex (color)
void rlColor4ub(unsigned char x, unsigned char y, unsigned char z, unsigned char w)
{
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter] = x;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter + 1] = y;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter + 2] = z;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].colors[4*RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter + 3] = w;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter++;
}
// Define one vertex (color)
void rlColor4f(float r, float g, float b, float a)
{
rlColor4ub((unsigned char)(r*255), (unsigned char)(g*255), (unsigned char)(b*255), (unsigned char)(a*255));
}
// Define one vertex (color)
void rlColor3f(float x, float y, float z)
{
rlColor4ub((unsigned char)(x*255), (unsigned char)(y*255), (unsigned char)(z*255), 255);
}
#endif
//--------------------------------------------------------------------------------------
// Module Functions Definition - OpenGL style functions (common to 1.1, 3.3+, ES2)
//--------------------------------------------------------------------------------------
// Set current texture to use
void rlSetTexture(unsigned int id)
{
if (id == 0)
{
#if defined(GRAPHICS_API_OPENGL_11)
rlDisableTexture();
#else
// NOTE: If quads batch limit is reached, we force a draw call and next batch starts
if (RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter >=
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].elementsCount*4)
{
rlDrawRenderBatch(RLGL.currentBatch);
}
#endif
}
else
{
#if defined(GRAPHICS_API_OPENGL_11)
rlEnableTexture(id);
#else
if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].textureId != id)
{
if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount > 0)
{
// Make sure current RLGL.currentBatch->draws[i].vertexCount is aligned a multiple of 4,
// that way, following QUADS drawing will keep aligned with index processing
// It implies adding some extra alignment vertex at the end of the draw,
// those vertex are not processed but they are considered as an additional offset
// for the next set of vertex to be drawn
if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].mode == RL_LINES) RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment = ((RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount < 4)? RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount : RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount%4);
else if (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].mode == RL_TRIANGLES) RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment = ((RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount < 4)? 1 : (4 - (RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount%4)));
else RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment = 0;
if (!rlCheckRenderBatchLimit(RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment))
{
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter += RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].cCounter += RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment;
RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].tcCounter += RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexAlignment;
RLGL.currentBatch->drawsCounter++;
}
}
if (RLGL.currentBatch->drawsCounter >= DEFAULT_BATCH_DRAWCALLS) rlDrawRenderBatch(RLGL.currentBatch);
RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].textureId = id;
RLGL.currentBatch->draws[RLGL.currentBatch->drawsCounter - 1].vertexCount = 0;
}
#endif
}
}
// Select and active a texture slot
void rlActiveTextureSlot(int slot)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glActiveTexture(GL_TEXTURE0 + slot);
#endif
}
// Enable texture
void rlEnableTexture(unsigned int id)
{
#if defined(GRAPHICS_API_OPENGL_11)
glEnable(GL_TEXTURE_2D);
#endif
glBindTexture(GL_TEXTURE_2D, id);
}
// Disable texture
void rlDisableTexture(void)
{
#if defined(GRAPHICS_API_OPENGL_11)
glDisable(GL_TEXTURE_2D);
#endif
glBindTexture(GL_TEXTURE_2D, 0);
}
// Enable texture cubemap
void rlEnableTextureCubemap(unsigned int id)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glEnable(GL_TEXTURE_CUBE_MAP); // Core in OpenGL 1.4
glBindTexture(GL_TEXTURE_CUBE_MAP, id);
#endif
}
// Disable texture cubemap
void rlDisableTextureCubemap(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDisable(GL_TEXTURE_CUBE_MAP);
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
#endif
}
// Set texture parameters (wrap mode/filter mode)
void rlTextureParameters(unsigned int id, int param, int value)
{
glBindTexture(GL_TEXTURE_2D, id);
switch (param)
{
case RL_TEXTURE_WRAP_S:
case RL_TEXTURE_WRAP_T:
{
if (value == RL_TEXTURE_WRAP_MIRROR_CLAMP)
{
#if !defined(GRAPHICS_API_OPENGL_11)
if (RLGL.ExtSupported.texMirrorClamp) glTexParameteri(GL_TEXTURE_2D, param, value);
else TRACELOG(LOG_WARNING, "GL: Clamp mirror wrap mode not supported (GL_MIRROR_CLAMP_EXT)");
#endif
}
else glTexParameteri(GL_TEXTURE_2D, param, value);
} break;
case RL_TEXTURE_MAG_FILTER:
case RL_TEXTURE_MIN_FILTER: glTexParameteri(GL_TEXTURE_2D, param, value); break;
case RL_TEXTURE_FILTER_ANISOTROPIC:
{
#if !defined(GRAPHICS_API_OPENGL_11)
if (value <= RLGL.ExtSupported.maxAnisotropyLevel) glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, (float)value);
else if (RLGL.ExtSupported.maxAnisotropyLevel > 0.0f)
{
TRACELOG(LOG_WARNING, "GL: Maximum anisotropic filter level supported is %iX", id, RLGL.ExtSupported.maxAnisotropyLevel);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, (float)value);
}
else TRACELOG(LOG_WARNING, "GL: Anisotropic filtering not supported");
#endif
} break;
default: break;
}
glBindTexture(GL_TEXTURE_2D, 0);
}
// Enable shader program
void rlEnableShader(unsigned int id)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2))
glUseProgram(id);
#endif
}
// Disable shader program
void rlDisableShader(void)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2))
glUseProgram(0);
#endif
}
// Enable rendering to texture (fbo)
void rlEnableFramebuffer(unsigned int id)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)) && defined(SUPPORT_RENDER_TEXTURES_HINT)
glBindFramebuffer(GL_FRAMEBUFFER, id);
#endif
}
// Disable rendering to texture
void rlDisableFramebuffer(void)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)) && defined(SUPPORT_RENDER_TEXTURES_HINT)
glBindFramebuffer(GL_FRAMEBUFFER, 0);
#endif
}
// Enable depth test
void rlEnableDepthTest(void) { glEnable(GL_DEPTH_TEST); }
// Disable depth test
void rlDisableDepthTest(void) { glDisable(GL_DEPTH_TEST); }
// Enable depth write
void rlEnableDepthMask(void) { glDepthMask(GL_TRUE); }
// Disable depth write
void rlDisableDepthMask(void) { glDepthMask(GL_FALSE); }
// Enable backface culling
void rlEnableBackfaceCulling(void) { glEnable(GL_CULL_FACE); }
// Disable backface culling
void rlDisableBackfaceCulling(void) { glDisable(GL_CULL_FACE); }
// Enable scissor test
void rlEnableScissorTest(void) { glEnable(GL_SCISSOR_TEST); }
// Disable scissor test
void rlDisableScissorTest(void) { glDisable(GL_SCISSOR_TEST); }
// Scissor test
void rlScissor(int x, int y, int width, int height) { glScissor(x, y, width, height); }
// Enable wire mode
void rlEnableWireMode(void)
{
#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
// NOTE: glPolygonMode() not available on OpenGL ES
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
#endif
}
// Disable wire mode
void rlDisableWireMode(void)
{
#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
// NOTE: glPolygonMode() not available on OpenGL ES
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
#endif
}
// Set the line drawing width
void rlSetLineWidth(float width)
{
glLineWidth(width);
}
// Get the line drawing width
float rlGetLineWidth(void)
{
float width = 0;
glGetFloatv(GL_LINE_WIDTH, &width);
return width;
}
// Enable line aliasing
void rlEnableSmoothLines(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_11)
glEnable(GL_LINE_SMOOTH);
#endif
}
// Disable line aliasing
void rlDisableSmoothLines(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_11)
glDisable(GL_LINE_SMOOTH);
#endif
}
// Enable stereo rendering
void rlEnableStereoRender(void)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2))
RLGL.State.stereoRender = true;
#endif
}
// Disable stereo rendering
void rlDisableStereoRender(void)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2))
RLGL.State.stereoRender = false;
#endif
}
// Check if stereo render is enabled
bool rlIsStereoRenderEnabled(void)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2))
return RLGL.State.stereoRender;
#else
return false;
#endif
}
// Clear color buffer with color
void rlClearColor(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
// Color values clamp to 0.0f(0) and 1.0f(255)
float cr = (float)r/255;
float cg = (float)g/255;
float cb = (float)b/255;
float ca = (float)a/255;
glClearColor(cr, cg, cb, ca);
}
// Clear used screen buffers (color and depth)
void rlClearScreenBuffers(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear used buffers: Color and Depth (Depth is used for 3D)
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); // Stencil buffer not used...
}
// Check and log OpenGL error codes
void rlCheckErrors()
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
int check = 1;
while (check)
{
const GLenum err = glGetError();
switch (err)
{
case GL_NO_ERROR: check = 0; break;
case 0x0500: TRACELOG(LOG_WARNING, "GL: Error detected: GL_INVALID_ENUM"); break;
case 0x0501: TRACELOG(LOG_WARNING, "GL: Error detected: GL_INVALID_VALUE"); break;
case 0x0502: TRACELOG(LOG_WARNING, "GL: Error detected: GL_INVALID_OPERATION"); break;
case 0x0503: TRACELOG(LOG_WARNING, "GL: Error detected: GL_STACK_OVERFLOW"); break;
case 0x0504: TRACELOG(LOG_WARNING, "GL: Error detected: GL_STACK_UNDERFLOW"); break;
case 0x0505: TRACELOG(LOG_WARNING, "GL: Error detected: GL_OUT_OF_MEMORY"); break;
case 0x0506: TRACELOG(LOG_WARNING, "GL: Error detected: GL_INVALID_FRAMEBUFFER_OPERATION"); break;
default: TRACELOG(LOG_WARNING, "GL: Error detected: Unknown error code: %x", err); break;
}
}
#endif
}
// Set blend mode
void rlSetBlendMode(int mode)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if (RLGL.State.currentBlendMode != mode)
{
rlDrawRenderBatch(RLGL.currentBatch);
switch (mode)
{
case BLEND_ALPHA: glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glBlendEquation(GL_FUNC_ADD); break;
case BLEND_ADDITIVE: glBlendFunc(GL_SRC_ALPHA, GL_ONE); glBlendEquation(GL_FUNC_ADD); break;
case BLEND_MULTIPLIED: glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA); glBlendEquation(GL_FUNC_ADD); break;
case BLEND_ADD_COLORS: glBlendFunc(GL_ONE, GL_ONE); glBlendEquation(GL_FUNC_ADD); break;
case BLEND_SUBTRACT_COLORS: glBlendFunc(GL_ONE, GL_ONE); glBlendEquation(GL_FUNC_SUBTRACT); break;
case BLEND_CUSTOM: glBlendFunc(RLGL.State.glBlendSrcFactor, RLGL.State.glBlendDstFactor); glBlendEquation(RLGL.State.glBlendEquation); break;
default: break;
}
RLGL.State.currentBlendMode = mode;
}
#endif
}
// Set blending mode factor and equation
void rlSetBlendFactors(int glSrcFactor, int glDstFactor, int glEquation)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
RLGL.State.glBlendSrcFactor = glSrcFactor;
RLGL.State.glBlendDstFactor = glDstFactor;
RLGL.State.glBlendEquation = glEquation;
#endif
}
//----------------------------------------------------------------------------------
// Module Functions Definition - rlgl functionality
//----------------------------------------------------------------------------------
// Initialize rlgl: OpenGL extensions, default buffers/shaders/textures, OpenGL states
void rlglInit(int width, int height)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Init default white texture
unsigned char pixels[4] = { 255, 255, 255, 255 }; // 1 pixel RGBA (4 bytes)
RLGL.State.defaultTextureId = rlLoadTexture(pixels, 1, 1, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, 1);
if (RLGL.State.defaultTextureId != 0) TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Default texture loaded successfully", RLGL.State.defaultTextureId);
else TRACELOG(LOG_WARNING, "TEXTURE: Failed to load default texture");
// Init default Shader (customized for GL 3.3 and ES2)
rlLoadShaderDefault(); // RLGL.State.defaultShader
RLGL.State.currentShader = RLGL.State.defaultShader;
// Init default vertex arrays buffers
RLGL.defaultBatch = rlLoadRenderBatch(DEFAULT_BATCH_BUFFERS, DEFAULT_BATCH_BUFFER_ELEMENTS);
RLGL.currentBatch = &RLGL.defaultBatch;
// Init stack matrices (emulating OpenGL 1.1)
for (int i = 0; i < MAX_MATRIX_STACK_SIZE; i++) RLGL.State.stack[i] = MatrixIdentity();
// Init internal matrices
RLGL.State.transform = MatrixIdentity();
RLGL.State.projection = MatrixIdentity();
RLGL.State.modelview = MatrixIdentity();
RLGL.State.currentMatrix = &RLGL.State.modelview;
#endif // GRAPHICS_API_OPENGL_33 || GRAPHICS_API_OPENGL_ES2
// Initialize OpenGL default states
//----------------------------------------------------------
// Init state: Depth test
glDepthFunc(GL_LEQUAL); // Type of depth testing to apply
glDisable(GL_DEPTH_TEST); // Disable depth testing for 2D (only used for 3D)
// Init state: Blending mode
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Color blending function (how colors are mixed)
glEnable(GL_BLEND); // Enable color blending (required to work with transparencies)
// Init state: Culling
// NOTE: All shapes/models triangles are drawn CCW
glCullFace(GL_BACK); // Cull the back face (default)
glFrontFace(GL_CCW); // Front face are defined counter clockwise (default)
glEnable(GL_CULL_FACE); // Enable backface culling
// Init state: Cubemap seamless
#if defined(GRAPHICS_API_OPENGL_33)
glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS); // Seamless cubemaps (not supported on OpenGL ES 2.0)
#endif
#if defined(GRAPHICS_API_OPENGL_11)
// Init state: Color hints (deprecated in OpenGL 3.0+)
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Improve quality of color and texture coordinate interpolation
glShadeModel(GL_SMOOTH); // Smooth shading between vertex (vertex colors interpolation)
#endif
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Store screen size into global variables
RLGL.State.framebufferWidth = width;
RLGL.State.framebufferHeight = height;
TRACELOG(LOG_INFO, "RLGL: Default OpenGL state initialized successfully");
//----------------------------------------------------------
#endif
// Init state: Color/Depth buffers clear
glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // Set clear color (black)
glClearDepth(1.0f); // Set clear depth value (default)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear color and depth buffers (depth buffer required for 3D)
}
// Vertex Buffer Object deinitialization (memory free)
void rlglClose(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
rlUnloadRenderBatch(RLGL.defaultBatch);
rlUnloadShaderDefault(); // Unload default shader
glDeleteTextures(1, &RLGL.State.defaultTextureId); // Unload default texture
TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Default texture unloaded successfully", RLGL.State.defaultTextureId);
#endif
}
// Load OpenGL extensions
// NOTE: External loader function must be provided
void rlLoadExtensions(void *loader)
{
#if defined(GRAPHICS_API_OPENGL_33) // Also defined for GRAPHICS_API_OPENGL_21
// NOTE: glad is generated and contains only required OpenGL 3.3 Core extensions (and lower versions)
#if !defined(__APPLE__)
if (!gladLoadGLLoader((GLADloadproc)loader)) TRACELOG(LOG_WARNING, "GLAD: Cannot load OpenGL extensions");
else TRACELOG(LOG_INFO, "GLAD: OpenGL extensions loaded successfully");
#endif
// Get number of supported extensions
GLint numExt = 0;
glGetIntegerv(GL_NUM_EXTENSIONS, &numExt);
TRACELOG(LOG_INFO, "GL: Supported extensions count: %i", numExt);
#if defined(SUPPORT_GL_DETAILS_INFO)
// Get supported extensions list
// WARNING: glGetStringi() not available on OpenGL 2.1
char **extList = RL_MALLOC(sizeof(char *)*numExt);
TRACELOG(LOG_INFO, "GL: OpenGL extensions:");
for (int i = 0; i < numExt; i++)
{
extList[i] = (char *)glGetStringi(GL_EXTENSIONS, i);
TRACELOG(LOG_INFO, " %s", extList[i]);
}
RL_FREE(extList); // Free extensions pointers
#endif
// Register supported extensions flags
// OpenGL 3.3 extensions supported by default (core)
RLGL.ExtSupported.vao = true;
RLGL.ExtSupported.instancing = true;
RLGL.ExtSupported.texNPOT = true;
RLGL.ExtSupported.texFloat32 = true;
RLGL.ExtSupported.texDepth = true;
RLGL.ExtSupported.maxDepthBits = 32;
RLGL.ExtSupported.texAnisoFilter = true;
RLGL.ExtSupported.texMirrorClamp = true;
#if !defined(__APPLE__)
// NOTE: With GLAD, we can check if an extension is supported using the GLAD_GL_xxx booleans
if (GLAD_GL_EXT_texture_compression_s3tc) RLGL.ExtSupported.texCompDXT = true; // Texture compression: DXT
if (GLAD_GL_ARB_ES3_compatibility) RLGL.ExtSupported.texCompETC2 = true; // Texture compression: ETC2/EAC
#endif
#endif // GRAPHICS_API_OPENGL_33
#if defined(GRAPHICS_API_OPENGL_ES2)
// Get supported extensions list
GLint numExt = 0;
const char **extList = RL_MALLOC(512*sizeof(const char *)); // Allocate 512 strings pointers (2 KB)
const char *extensions = (const char *)glGetString(GL_EXTENSIONS); // One big const string
// NOTE: We have to duplicate string because glGetString() returns a const string
int len = strlen(extensions) + 1;
char *extensionsDup = (char *)RL_CALLOC(len, sizeof(char));
strcpy(extensionsDup, extensions);
extList[numExt] = extensionsDup;
for (int i = 0; i < len; i++)
{
if (extensionsDup[i] == ' ')
{
extensionsDup[i] = '\0';
numExt++;
extList[numExt] = &extensionsDup[i + 1];
}
}
TRACELOG(LOG_INFO, "GL: Supported extensions count: %i", numExt);
#if defined(SUPPORT_GL_DETAILS_INFO)
TRACELOG(LOG_INFO, "GL: OpenGL extensions:");
for (int i = 0; i < numExt; i++) TRACELOG(LOG_INFO, " %s", extList[i]);
#endif
// Check required extensions
for (int i = 0; i < numExt; i++)
{
// Check VAO support
// NOTE: Only check on OpenGL ES, OpenGL 3.3 has VAO support as core feature
if (strcmp(extList[i], (const char *)"GL_OES_vertex_array_object") == 0)
{
// The extension is supported by our hardware and driver, try to get related functions pointers
// NOTE: emscripten does not support VAOs natively, it uses emulation and it reduces overall performance...
glGenVertexArrays = (PFNGLGENVERTEXARRAYSOESPROC)((rlglLoadProc)loader)("glGenVertexArraysOES");
glBindVertexArray = (PFNGLBINDVERTEXARRAYOESPROC)((rlglLoadProc)loader)("glBindVertexArrayOES");
glDeleteVertexArrays = (PFNGLDELETEVERTEXARRAYSOESPROC)((rlglLoadProc)loader)("glDeleteVertexArraysOES");
//glIsVertexArray = (PFNGLISVERTEXARRAYOESPROC)loader("glIsVertexArrayOES"); // NOTE: Fails in WebGL, omitted
if ((glGenVertexArrays != NULL) && (glBindVertexArray != NULL) && (glDeleteVertexArrays != NULL)) RLGL.ExtSupported.vao = true;
}
// Check instanced rendering support
if (strcmp(extList[i], (const char *)"GL_ANGLE_instanced_arrays") == 0) // Web ANGLE
{
glDrawArraysInstanced = (PFNGLDRAWARRAYSINSTANCEDEXTPROC)((rlglLoadProc)loader)("glDrawArraysInstancedANGLE");
glDrawElementsInstanced = (PFNGLDRAWELEMENTSINSTANCEDEXTPROC)((rlglLoadProc)loader)("glDrawElementsInstancedANGLE");
glVertexAttribDivisor = (PFNGLVERTEXATTRIBDIVISOREXTPROC)((rlglLoadProc)loader)("glVertexAttribDivisorANGLE");
if ((glDrawArraysInstanced != NULL) && (glDrawElementsInstanced != NULL) && (glVertexAttribDivisor != NULL)) RLGL.ExtSupported.instancing = true;
}
else
{
if ((strcmp(extList[i], (const char *)"GL_EXT_draw_instanced") == 0) && // Standard EXT
(strcmp(extList[i], (const char *)"GL_EXT_instanced_arrays") == 0))
{
glDrawArraysInstanced = (PFNGLDRAWARRAYSINSTANCEDEXTPROC)((rlglLoadProc)loader)("glDrawArraysInstancedEXT");
glDrawElementsInstanced = (PFNGLDRAWELEMENTSINSTANCEDEXTPROC)((rlglLoadProc)loader)("glDrawElementsInstancedEXT");
glVertexAttribDivisor = (PFNGLVERTEXATTRIBDIVISOREXTPROC)((rlglLoadProc)loader)("glVertexAttribDivisorEXT");
if ((glDrawArraysInstanced != NULL) && (glDrawElementsInstanced != NULL) && (glVertexAttribDivisor != NULL)) RLGL.ExtSupported.instancing = true;
}
}
// Check NPOT textures support
// NOTE: Only check on OpenGL ES, OpenGL 3.3 has NPOT textures full support as core feature
if (strcmp(extList[i], (const char *)"GL_OES_texture_npot") == 0) RLGL.ExtSupported.texNPOT = true;
// Check texture float support
if (strcmp(extList[i], (const char *)"GL_OES_texture_float") == 0) RLGL.ExtSupported.texFloat32 = true;
// Check depth texture support
if ((strcmp(extList[i], (const char *)"GL_OES_depth_texture") == 0) ||
(strcmp(extList[i], (const char *)"GL_WEBGL_depth_texture") == 0)) RLGL.ExtSupported.texDepth = true;
if (strcmp(extList[i], (const char *)"GL_OES_depth24") == 0) RLGL.ExtSupported.maxDepthBits = 24;
if (strcmp(extList[i], (const char *)"GL_OES_depth32") == 0) RLGL.ExtSupported.maxDepthBits = 32;
// Check texture compression support: DXT
if ((strcmp(extList[i], (const char *)"GL_EXT_texture_compression_s3tc") == 0) ||
(strcmp(extList[i], (const char *)"GL_WEBGL_compressed_texture_s3tc") == 0) ||
(strcmp(extList[i], (const char *)"GL_WEBKIT_WEBGL_compressed_texture_s3tc") == 0)) RLGL.ExtSupported.texCompDXT = true;
// Check texture compression support: ETC1
if ((strcmp(extList[i], (const char *)"GL_OES_compressed_ETC1_RGB8_texture") == 0) ||
(strcmp(extList[i], (const char *)"GL_WEBGL_compressed_texture_etc1") == 0)) RLGL.ExtSupported.texCompETC1 = true;
// Check texture compression support: ETC2/EAC
if (strcmp(extList[i], (const char *)"GL_ARB_ES3_compatibility") == 0) RLGL.ExtSupported.texCompETC2 = true;
// Check texture compression support: PVR
if (strcmp(extList[i], (const char *)"GL_IMG_texture_compression_pvrtc") == 0) RLGL.ExtSupported.texCompPVRT = true;
// Check texture compression support: ASTC
if (strcmp(extList[i], (const char *)"GL_KHR_texture_compression_astc_hdr") == 0) RLGL.ExtSupported.texCompASTC = true;
// Check anisotropic texture filter support
if (strcmp(extList[i], (const char *)"GL_EXT_texture_filter_anisotropic") == 0) RLGL.ExtSupported.texAnisoFilter = true;
// Check clamp mirror wrap mode support
if (strcmp(extList[i], (const char *)"GL_EXT_texture_mirror_clamp") == 0) RLGL.ExtSupported.texMirrorClamp = true;
}
// Free extensions pointers
RL_FREE(extList);
RL_FREE(extensionsDup); // Duplicated string must be deallocated
#endif // GRAPHICS_API_OPENGL_ES2
// Check OpenGL information and capabilities
//------------------------------------------------------------------------------
// Show current OpenGL and GLSL version
TRACELOG(LOG_INFO, "GL: OpenGL device information:");
TRACELOG(LOG_INFO, " > Vendor: %s", glGetString(GL_VENDOR));
TRACELOG(LOG_INFO, " > Renderer: %s", glGetString(GL_RENDERER));
TRACELOG(LOG_INFO, " > Version: %s", glGetString(GL_VERSION));
TRACELOG(LOG_INFO, " > GLSL: %s", glGetString(GL_SHADING_LANGUAGE_VERSION));
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// NOTE: Anisotropy levels capability is an extension
#ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT
#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
#endif
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &RLGL.ExtSupported.maxAnisotropyLevel);
#if defined(SUPPORT_GL_DETAILS_INFO)
// Show some OpenGL GPU capabilities
TRACELOG(LOG_INFO, "GL: OpenGL capabilities:");
GLint capability = 0;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &capability);
TRACELOG(LOG_INFO, " GL_MAX_TEXTURE_SIZE: %i", capability);
glGetIntegerv(GL_MAX_CUBE_MAP_TEXTURE_SIZE, &capability);
TRACELOG(LOG_INFO, " GL_MAX_CUBE_MAP_TEXTURE_SIZE: %i", capability);
glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &capability);
TRACELOG(LOG_INFO, " GL_MAX_TEXTURE_IMAGE_UNITS: %i", capability);
glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &capability);
TRACELOG(LOG_INFO, " GL_MAX_VERTEX_ATTRIBS: %i", capability);
#if !defined(GRAPHICS_API_OPENGL_ES2)
glGetIntegerv(GL_MAX_UNIFORM_BLOCK_SIZE, &capability);
TRACELOG(LOG_INFO, " GL_MAX_UNIFORM_BLOCK_SIZE: %i", capability);
glGetIntegerv(GL_MAX_DRAW_BUFFERS, &capability);
TRACELOG(LOG_INFO, " GL_MAX_DRAW_BUFFERS: %i", capability);
if (RLGL.ExtSupported.texAnisoFilter) TRACELOG(LOG_INFO, " GL_MAX_TEXTURE_MAX_ANISOTROPY: %.0f", RLGL.ExtSupported.maxAnisotropyLevel);
#endif
glGetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &capability);
TRACELOG(LOG_INFO, " GL_NUM_COMPRESSED_TEXTURE_FORMATS: %i", capability);
GLint format[32] = { 0 };
glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS, format);
for (int i = 0; i < capability; i++) TRACELOG(LOG_INFO, " %s", rlGetCompressedFormatName(format[i]));
/*
// Following capabilities are only supported by OpenGL 4.3 or greater
glGetIntegerv(GL_MAX_VERTEX_ATTRIB_BINDINGS, &capability);
TRACELOG(LOG_INFO, " GL_MAX_VERTEX_ATTRIB_BINDINGS: %i", capability);
glGetIntegerv(GL_MAX_UNIFORM_LOCATIONS, &capability);
TRACELOG(LOG_INFO, " GL_MAX_UNIFORM_LOCATIONS: %i", capability);
*/
#else // SUPPORT_GL_DETAILS_INFO
// Show some basic info about GL supported features
#if defined(GRAPHICS_API_OPENGL_ES2)
if (RLGL.ExtSupported.vao) TRACELOG(LOG_INFO, "GL: VAO extension detected, VAO functions loaded successfully");
else TRACELOG(LOG_WARNING, "GL: VAO extension not found, VAO not supported");
if (RLGL.ExtSupported.texNPOT) TRACELOG(LOG_INFO, "GL: NPOT textures extension detected, full NPOT textures supported");
else TRACELOG(LOG_WARNING, "GL: NPOT textures extension not found, limited NPOT support (no-mipmaps, no-repeat)");
#endif
if (RLGL.ExtSupported.texCompDXT) TRACELOG(LOG_INFO, "GL: DXT compressed textures supported");
if (RLGL.ExtSupported.texCompETC1) TRACELOG(LOG_INFO, "GL: ETC1 compressed textures supported");
if (RLGL.ExtSupported.texCompETC2) TRACELOG(LOG_INFO, "GL: ETC2/EAC compressed textures supported");
if (RLGL.ExtSupported.texCompPVRT) TRACELOG(LOG_INFO, "GL: PVRT compressed textures supported");
if (RLGL.ExtSupported.texCompASTC) TRACELOG(LOG_INFO, "GL: ASTC compressed textures supported");
#endif // SUPPORT_GL_DETAILS_INFO
#endif // GRAPHICS_API_OPENGL_33 || GRAPHICS_API_OPENGL_ES2
}
// Returns current OpenGL version
int rlGetVersion(void)
{
#if defined(GRAPHICS_API_OPENGL_11)
return OPENGL_11;
#endif
#if defined(GRAPHICS_API_OPENGL_21)
#if defined(__APPLE__)
return OPENGL_33; // NOTE: Force OpenGL 3.3 on OSX
#else
return OPENGL_21;
#endif
#elif defined(GRAPHICS_API_OPENGL_33)
return OPENGL_33;
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
return OPENGL_ES_20;
#endif
}
// Get default framebuffer width
int rlGetFramebufferWidth(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
return RLGL.State.framebufferWidth;
#else
return 0;
#endif
}
// Get default framebuffer height
int rlGetFramebufferHeight(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
return RLGL.State.framebufferHeight;
#else
return 0;
#endif
}
// Get default internal shader (simple texture + tint color)
Shader rlGetShaderDefault(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
return RLGL.State.defaultShader;
#else
Shader shader = { 0 };
return shader;
#endif
}
// Get default internal texture (white texture)
Texture2D rlGetTextureDefault(void)
{
Texture2D texture = { 0 };
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
texture.id = RLGL.State.defaultTextureId;
texture.width = 1;
texture.height = 1;
texture.mipmaps = 1;
texture.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8;
#endif
return texture;
}
// Render batch management
//------------------------------------------------------------------------------------------------
// Load render batch
RenderBatch rlLoadRenderBatch(int numBuffers, int bufferElements)
{
RenderBatch batch = { 0 };
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Initialize CPU (RAM) vertex buffers (position, texcoord, color data and indexes)
//--------------------------------------------------------------------------------------------
batch.vertexBuffer = (VertexBuffer *)RL_MALLOC(sizeof(VertexBuffer)*numBuffers);
for (int i = 0; i < numBuffers; i++)
{
batch.vertexBuffer[i].elementsCount = bufferElements;
batch.vertexBuffer[i].vertices = (float *)RL_MALLOC(bufferElements*3*4*sizeof(float)); // 3 float by vertex, 4 vertex by quad
batch.vertexBuffer[i].texcoords = (float *)RL_MALLOC(bufferElements*2*4*sizeof(float)); // 2 float by texcoord, 4 texcoord by quad
batch.vertexBuffer[i].colors = (unsigned char *)RL_MALLOC(bufferElements*4*4*sizeof(unsigned char)); // 4 float by color, 4 colors by quad
#if defined(GRAPHICS_API_OPENGL_33)
batch.vertexBuffer[i].indices = (unsigned int *)RL_MALLOC(bufferElements*6*sizeof(unsigned int)); // 6 int by quad (indices)
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
batch.vertexBuffer[i].indices = (unsigned short *)RL_MALLOC(bufferElements*6*sizeof(unsigned short)); // 6 int by quad (indices)
#endif
for (int j = 0; j < (3*4*bufferElements); j++) batch.vertexBuffer[i].vertices[j] = 0.0f;
for (int j = 0; j < (2*4*bufferElements); j++) batch.vertexBuffer[i].texcoords[j] = 0.0f;
for (int j = 0; j < (4*4*bufferElements); j++) batch.vertexBuffer[i].colors[j] = 0;
int k = 0;
// Indices can be initialized right now
for (int j = 0; j < (6*bufferElements); j += 6)
{
batch.vertexBuffer[i].indices[j] = 4*k;
batch.vertexBuffer[i].indices[j + 1] = 4*k + 1;
batch.vertexBuffer[i].indices[j + 2] = 4*k + 2;
batch.vertexBuffer[i].indices[j + 3] = 4*k;
batch.vertexBuffer[i].indices[j + 4] = 4*k + 2;
batch.vertexBuffer[i].indices[j + 5] = 4*k + 3;
k++;
}
batch.vertexBuffer[i].vCounter = 0;
batch.vertexBuffer[i].tcCounter = 0;
batch.vertexBuffer[i].cCounter = 0;
}
TRACELOG(LOG_INFO, "RLGL: Render batch vertex buffers loaded successfully in RAM (CPU)");
//--------------------------------------------------------------------------------------------
// Upload to GPU (VRAM) vertex data and initialize VAOs/VBOs
//--------------------------------------------------------------------------------------------
for (int i = 0; i < numBuffers; i++)
{
if (RLGL.ExtSupported.vao)
{
// Initialize Quads VAO
glGenVertexArrays(1, &batch.vertexBuffer[i].vaoId);
glBindVertexArray(batch.vertexBuffer[i].vaoId);
}
// Quads - Vertex buffers binding and attributes enable
// Vertex position buffer (shader-location = 0)
glGenBuffers(1, &batch.vertexBuffer[i].vboId[0]);
glBindBuffer(GL_ARRAY_BUFFER, batch.vertexBuffer[i].vboId[0]);
glBufferData(GL_ARRAY_BUFFER, bufferElements*3*4*sizeof(float), batch.vertexBuffer[i].vertices, GL_DYNAMIC_DRAW);
glEnableVertexAttribArray(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_POSITION]);
glVertexAttribPointer(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_POSITION], 3, GL_FLOAT, 0, 0, 0);
// Vertex texcoord buffer (shader-location = 1)
glGenBuffers(1, &batch.vertexBuffer[i].vboId[1]);
glBindBuffer(GL_ARRAY_BUFFER, batch.vertexBuffer[i].vboId[1]);
glBufferData(GL_ARRAY_BUFFER, bufferElements*2*4*sizeof(float), batch.vertexBuffer[i].texcoords, GL_DYNAMIC_DRAW);
glEnableVertexAttribArray(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_TEXCOORD01]);
glVertexAttribPointer(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_TEXCOORD01], 2, GL_FLOAT, 0, 0, 0);
// Vertex color buffer (shader-location = 3)
glGenBuffers(1, &batch.vertexBuffer[i].vboId[2]);
glBindBuffer(GL_ARRAY_BUFFER, batch.vertexBuffer[i].vboId[2]);
glBufferData(GL_ARRAY_BUFFER, bufferElements*4*4*sizeof(unsigned char), batch.vertexBuffer[i].colors, GL_DYNAMIC_DRAW);
glEnableVertexAttribArray(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_COLOR]);
glVertexAttribPointer(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_COLOR], 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0);
// Fill index buffer
glGenBuffers(1, &batch.vertexBuffer[i].vboId[3]);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, batch.vertexBuffer[i].vboId[3]);
#if defined(GRAPHICS_API_OPENGL_33)
glBufferData(GL_ELEMENT_ARRAY_BUFFER, bufferElements*6*sizeof(int), batch.vertexBuffer[i].indices, GL_STATIC_DRAW);
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
glBufferData(GL_ELEMENT_ARRAY_BUFFER, bufferElements*6*sizeof(short), batch.vertexBuffer[i].indices, GL_STATIC_DRAW);
#endif
}
TRACELOG(LOG_INFO, "RLGL: Render batch vertex buffers loaded successfully in VRAM (GPU)");
// Unbind the current VAO
if (RLGL.ExtSupported.vao) glBindVertexArray(0);
//--------------------------------------------------------------------------------------------
// Init draw calls tracking system
//--------------------------------------------------------------------------------------------
batch.draws = (DrawCall *)RL_MALLOC(DEFAULT_BATCH_DRAWCALLS*sizeof(DrawCall));
for (int i = 0; i < DEFAULT_BATCH_DRAWCALLS; i++)
{
batch.draws[i].mode = RL_QUADS;
batch.draws[i].vertexCount = 0;
batch.draws[i].vertexAlignment = 0;
//batch.draws[i].vaoId = 0;
//batch.draws[i].shaderId = 0;
batch.draws[i].textureId = RLGL.State.defaultTextureId;
//batch.draws[i].RLGL.State.projection = MatrixIdentity();
//batch.draws[i].RLGL.State.modelview = MatrixIdentity();
}
batch.buffersCount = numBuffers; // Record buffer count
batch.drawsCounter = 1; // Reset draws counter
batch.currentDepth = -1.0f; // Reset depth value
//--------------------------------------------------------------------------------------------
#endif
return batch;
}
// Unload default internal buffers vertex data from CPU and GPU
void rlUnloadRenderBatch(RenderBatch batch)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Unbind everything
if (RLGL.ExtSupported.vao) glBindVertexArray(0);
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glDisableVertexAttribArray(2);
glDisableVertexAttribArray(3);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
// Unload all vertex buffers data
for (int i = 0; i < batch.buffersCount; i++)
{
// Delete VBOs from GPU (VRAM)
glDeleteBuffers(1, &batch.vertexBuffer[i].vboId[0]);
glDeleteBuffers(1, &batch.vertexBuffer[i].vboId[1]);
glDeleteBuffers(1, &batch.vertexBuffer[i].vboId[2]);
glDeleteBuffers(1, &batch.vertexBuffer[i].vboId[3]);
// Delete VAOs from GPU (VRAM)
if (RLGL.ExtSupported.vao) glDeleteVertexArrays(1, &batch.vertexBuffer[i].vaoId);
// Free vertex arrays memory from CPU (RAM)
RL_FREE(batch.vertexBuffer[i].vertices);
RL_FREE(batch.vertexBuffer[i].texcoords);
RL_FREE(batch.vertexBuffer[i].colors);
RL_FREE(batch.vertexBuffer[i].indices);
}
// Unload arrays
RL_FREE(batch.vertexBuffer);
RL_FREE(batch.draws);
#endif
}
// Draw render batch
// NOTE: We require a pointer to reset batch and increase current buffer (multi-buffer)
void rlDrawRenderBatch(RenderBatch *batch)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Update batch vertex buffers
//------------------------------------------------------------------------------------------------------------
// NOTE: If there is not vertex data, buffers doesn't need to be updated (vertexCount > 0)
// TODO: If no data changed on the CPU arrays --> No need to re-update GPU arrays (change flag required)
if (batch->vertexBuffer[batch->currentBuffer].vCounter > 0)
{
// Activate elements VAO
if (RLGL.ExtSupported.vao) glBindVertexArray(batch->vertexBuffer[batch->currentBuffer].vaoId);
// Vertex positions buffer
glBindBuffer(GL_ARRAY_BUFFER, batch->vertexBuffer[batch->currentBuffer].vboId[0]);
glBufferSubData(GL_ARRAY_BUFFER, 0, batch->vertexBuffer[batch->currentBuffer].vCounter*3*sizeof(float), batch->vertexBuffer[batch->currentBuffer].vertices);
//glBufferData(GL_ARRAY_BUFFER, sizeof(float)*3*4*batch->vertexBuffer[batch->currentBuffer].elementsCount, batch->vertexBuffer[batch->currentBuffer].vertices, GL_DYNAMIC_DRAW); // Update all buffer
// Texture coordinates buffer
glBindBuffer(GL_ARRAY_BUFFER, batch->vertexBuffer[batch->currentBuffer].vboId[1]);
glBufferSubData(GL_ARRAY_BUFFER, 0, batch->vertexBuffer[batch->currentBuffer].vCounter*2*sizeof(float), batch->vertexBuffer[batch->currentBuffer].texcoords);
//glBufferData(GL_ARRAY_BUFFER, sizeof(float)*2*4*batch->vertexBuffer[batch->currentBuffer].elementsCount, batch->vertexBuffer[batch->currentBuffer].texcoords, GL_DYNAMIC_DRAW); // Update all buffer
// Colors buffer
glBindBuffer(GL_ARRAY_BUFFER, batch->vertexBuffer[batch->currentBuffer].vboId[2]);
glBufferSubData(GL_ARRAY_BUFFER, 0, batch->vertexBuffer[batch->currentBuffer].vCounter*4*sizeof(unsigned char), batch->vertexBuffer[batch->currentBuffer].colors);
//glBufferData(GL_ARRAY_BUFFER, sizeof(float)*4*4*batch->vertexBuffer[batch->currentBuffer].elementsCount, batch->vertexBuffer[batch->currentBuffer].colors, GL_DYNAMIC_DRAW); // Update all buffer
// NOTE: glMapBuffer() causes sync issue.
// If GPU is working with this buffer, glMapBuffer() will wait(stall) until GPU to finish its job.
// To avoid waiting (idle), you can call first glBufferData() with NULL pointer before glMapBuffer().
// If you do that, the previous data in PBO will be discarded and glMapBuffer() returns a new
// allocated pointer immediately even if GPU is still working with the previous data.
// Another option: map the buffer object into client's memory
// Probably this code could be moved somewhere else...
// batch->vertexBuffer[batch->currentBuffer].vertices = (float *)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
// if (batch->vertexBuffer[batch->currentBuffer].vertices)
// {
// Update vertex data
// }
// glUnmapBuffer(GL_ARRAY_BUFFER);
// Unbind the current VAO
if (RLGL.ExtSupported.vao) glBindVertexArray(0);
}
//------------------------------------------------------------------------------------------------------------
// Draw batch vertex buffers (considering VR stereo if required)
//------------------------------------------------------------------------------------------------------------
Matrix matProjection = RLGL.State.projection;
Matrix matModelView = RLGL.State.modelview;
int eyesCount = 1;
if (RLGL.State.stereoRender) eyesCount = 2;
for (int eye = 0; eye < eyesCount; eye++)
{
if (eyesCount == 2)
{
// Setup current eye viewport (half screen width)
rlViewport(eye*RLGL.State.framebufferWidth/2, 0, RLGL.State.framebufferWidth/2, RLGL.State.framebufferHeight);
// Set current eye view offset to modelview matrix
rlSetMatrixModelview(MatrixMultiply(matModelView, RLGL.State.viewOffsetStereo[eye]));
// Set current eye projection matrix
rlSetMatrixProjection(RLGL.State.projectionStereo[eye]);
}
// Draw buffers
if (batch->vertexBuffer[batch->currentBuffer].vCounter > 0)
{
// Set current shader and upload current MVP matrix
glUseProgram(RLGL.State.currentShader.id);
// Create modelview-projection matrix and upload to shader
Matrix matMVP = MatrixMultiply(RLGL.State.modelview, RLGL.State.projection);
glUniformMatrix4fv(RLGL.State.currentShader.locs[SHADER_LOC_MATRIX_MVP], 1, false, MatrixToFloat(matMVP));
if (RLGL.ExtSupported.vao) glBindVertexArray(batch->vertexBuffer[batch->currentBuffer].vaoId);
else
{
// Bind vertex attrib: position (shader-location = 0)
glBindBuffer(GL_ARRAY_BUFFER, batch->vertexBuffer[batch->currentBuffer].vboId[0]);
glVertexAttribPointer(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_POSITION], 3, GL_FLOAT, 0, 0, 0);
glEnableVertexAttribArray(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_POSITION]);
// Bind vertex attrib: texcoord (shader-location = 1)
glBindBuffer(GL_ARRAY_BUFFER, batch->vertexBuffer[batch->currentBuffer].vboId[1]);
glVertexAttribPointer(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_TEXCOORD01], 2, GL_FLOAT, 0, 0, 0);
glEnableVertexAttribArray(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_TEXCOORD01]);
// Bind vertex attrib: color (shader-location = 3)
glBindBuffer(GL_ARRAY_BUFFER, batch->vertexBuffer[batch->currentBuffer].vboId[2]);
glVertexAttribPointer(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_COLOR], 4, GL_UNSIGNED_BYTE, GL_TRUE, 0, 0);
glEnableVertexAttribArray(RLGL.State.currentShader.locs[SHADER_LOC_VERTEX_COLOR]);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, batch->vertexBuffer[batch->currentBuffer].vboId[3]);
}
// Setup some default shader values
glUniform4f(RLGL.State.currentShader.locs[SHADER_LOC_COLOR_DIFFUSE], 1.0f, 1.0f, 1.0f, 1.0f);
glUniform1i(RLGL.State.currentShader.locs[SHADER_LOC_MAP_DIFFUSE], 0); // Active default sampler2D: texture0
// Activate additional sampler textures
// Those additional textures will be common for all draw calls of the batch
for (int i = 0; i < MAX_BATCH_ACTIVE_TEXTURES; i++)
{
if (RLGL.State.activeTextureId[i] > 0)
{
glActiveTexture(GL_TEXTURE0 + 1 + i);
glBindTexture(GL_TEXTURE_2D, RLGL.State.activeTextureId[i]);
}
}
// Activate default sampler2D texture0 (one texture is always active for default batch shader)
// NOTE: Batch system accumulates calls by texture0 changes, additional textures are enabled for all the draw calls
glActiveTexture(GL_TEXTURE0);
for (int i = 0, vertexOffset = 0; i < batch->drawsCounter; i++)
{
// Bind current draw call texture, activated as GL_TEXTURE0 and binded to sampler2D texture0 by default
glBindTexture(GL_TEXTURE_2D, batch->draws[i].textureId);
if ((batch->draws[i].mode == RL_LINES) || (batch->draws[i].mode == RL_TRIANGLES)) glDrawArrays(batch->draws[i].mode, vertexOffset, batch->draws[i].vertexCount);
else
{
#if defined(GRAPHICS_API_OPENGL_33)
// We need to define the number of indices to be processed: quadsCount*6
// NOTE: The final parameter tells the GPU the offset in bytes from the
// start of the index buffer to the location of the first index to process
glDrawElements(GL_TRIANGLES, batch->draws[i].vertexCount/4*6, GL_UNSIGNED_INT, (GLvoid *)(vertexOffset/4*6*sizeof(GLuint)));
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
glDrawElements(GL_TRIANGLES, batch->draws[i].vertexCount/4*6, GL_UNSIGNED_SHORT, (GLvoid *)(vertexOffset/4*6*sizeof(GLushort)));
#endif
}
vertexOffset += (batch->draws[i].vertexCount + batch->draws[i].vertexAlignment);
}
if (!RLGL.ExtSupported.vao)
{
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
glBindTexture(GL_TEXTURE_2D, 0); // Unbind textures
}
if (RLGL.ExtSupported.vao) glBindVertexArray(0); // Unbind VAO
glUseProgram(0); // Unbind shader program
}
//------------------------------------------------------------------------------------------------------------
// Reset batch buffers
//------------------------------------------------------------------------------------------------------------
// Reset vertex counters for next frame
batch->vertexBuffer[batch->currentBuffer].vCounter = 0;
batch->vertexBuffer[batch->currentBuffer].tcCounter = 0;
batch->vertexBuffer[batch->currentBuffer].cCounter = 0;
// Reset depth for next draw
batch->currentDepth = -1.0f;
// Restore projection/modelview matrices
RLGL.State.projection = matProjection;
RLGL.State.modelview = matModelView;
// Reset RLGL.currentBatch->draws array
for (int i = 0; i < DEFAULT_BATCH_DRAWCALLS; i++)
{
batch->draws[i].mode = RL_QUADS;
batch->draws[i].vertexCount = 0;
batch->draws[i].textureId = RLGL.State.defaultTextureId;
}
// Reset active texture units for next batch
for (int i = 0; i < MAX_BATCH_ACTIVE_TEXTURES; i++) RLGL.State.activeTextureId[i] = 0;
// Reset draws counter to one draw for the batch
batch->drawsCounter = 1;
//------------------------------------------------------------------------------------------------------------
// Change to next buffer in the list (in case of multi-buffering)
batch->currentBuffer++;
if (batch->currentBuffer >= batch->buffersCount) batch->currentBuffer = 0;
#endif
}
// Set the active render batch for rlgl
void rlSetRenderBatchActive(RenderBatch *batch)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
rlDrawRenderBatch(RLGL.currentBatch);
if (batch != NULL) RLGL.currentBatch = batch;
else RLGL.currentBatch = &RLGL.defaultBatch;
#endif
}
// Update and draw internal render batch
void rlDrawRenderBatchActive(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
rlDrawRenderBatch(RLGL.currentBatch); // NOTE: Stereo rendering is checked inside
#endif
}
// Check internal buffer overflow for a given number of vertex
// and force a RenderBatch draw call if required
bool rlCheckRenderBatchLimit(int vCount)
{
bool overflow = false;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if ((RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].vCounter + vCount) >=
(RLGL.currentBatch->vertexBuffer[RLGL.currentBatch->currentBuffer].elementsCount*4))
{
overflow = true;
rlDrawRenderBatch(RLGL.currentBatch); // NOTE: Stereo rendering is checked inside
}
#endif
return overflow;
}
// Textures data management
//-----------------------------------------------------------------------------------------
// Convert image data to OpenGL texture (returns OpenGL valid Id)
unsigned int rlLoadTexture(void *data, int width, int height, int format, int mipmapCount)
{
glBindTexture(GL_TEXTURE_2D, 0); // Free any old binding
unsigned int id = 0;
// Check texture format support by OpenGL 1.1 (compressed textures not supported)
#if defined(GRAPHICS_API_OPENGL_11)
if (format >= PIXELFORMAT_COMPRESSED_DXT1_RGB)
{
TRACELOG(LOG_WARNING, "GL: OpenGL 1.1 does not support GPU compressed texture formats");
return id;
}
#else
if ((!RLGL.ExtSupported.texCompDXT) && ((format == PIXELFORMAT_COMPRESSED_DXT1_RGB) || (format == PIXELFORMAT_COMPRESSED_DXT1_RGBA) ||
(format == PIXELFORMAT_COMPRESSED_DXT3_RGBA) || (format == PIXELFORMAT_COMPRESSED_DXT5_RGBA)))
{
TRACELOG(LOG_WARNING, "GL: DXT compressed texture format not supported");
return id;
}
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if ((!RLGL.ExtSupported.texCompETC1) && (format == PIXELFORMAT_COMPRESSED_ETC1_RGB))
{
TRACELOG(LOG_WARNING, "GL: ETC1 compressed texture format not supported");
return id;
}
if ((!RLGL.ExtSupported.texCompETC2) && ((format == PIXELFORMAT_COMPRESSED_ETC2_RGB) || (format == PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA)))
{
TRACELOG(LOG_WARNING, "GL: ETC2 compressed texture format not supported");
return id;
}
if ((!RLGL.ExtSupported.texCompPVRT) && ((format == PIXELFORMAT_COMPRESSED_PVRT_RGB) || (format == PIXELFORMAT_COMPRESSED_PVRT_RGBA)))
{
TRACELOG(LOG_WARNING, "GL: PVRT compressed texture format not supported");
return id;
}
if ((!RLGL.ExtSupported.texCompASTC) && ((format == PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA) || (format == PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA)))
{
TRACELOG(LOG_WARNING, "GL: ASTC compressed texture format not supported");
return id;
}
#endif
#endif // GRAPHICS_API_OPENGL_11
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &id); // Generate texture id
glBindTexture(GL_TEXTURE_2D, id);
int mipWidth = width;
int mipHeight = height;
int mipOffset = 0; // Mipmap data offset
// Load the different mipmap levels
for (int i = 0; i < mipmapCount; i++)
{
unsigned int mipSize = rlGetPixelDataSize(mipWidth, mipHeight, format);
unsigned int glInternalFormat, glFormat, glType;
rlGetGlTextureFormats(format, &glInternalFormat, &glFormat, &glType);
TRACELOGD("TEXTURE: Load mipmap level %i (%i x %i), size: %i, offset: %i", i, mipWidth, mipHeight, mipSize, mipOffset);
if (glInternalFormat != -1)
{
if (format < PIXELFORMAT_COMPRESSED_DXT1_RGB) glTexImage2D(GL_TEXTURE_2D, i, glInternalFormat, mipWidth, mipHeight, 0, glFormat, glType, (unsigned char *)data + mipOffset);
#if !defined(GRAPHICS_API_OPENGL_11)
else glCompressedTexImage2D(GL_TEXTURE_2D, i, glInternalFormat, mipWidth, mipHeight, 0, mipSize, (unsigned char *)data + mipOffset);
#endif
#if defined(GRAPHICS_API_OPENGL_33)
if (format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE)
{
GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_ONE };
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask);
}
else if (format == PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA)
{
#if defined(GRAPHICS_API_OPENGL_21)
GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_ALPHA };
#elif defined(GRAPHICS_API_OPENGL_33)
GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_GREEN };
#endif
glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask);
}
#endif
}
mipWidth /= 2;
mipHeight /= 2;
mipOffset += mipSize;
// Security check for NPOT textures
if (mipWidth < 1) mipWidth = 1;
if (mipHeight < 1) mipHeight = 1;
}
// Texture parameters configuration
// NOTE: glTexParameteri does NOT affect texture uploading, just the way it's used
#if defined(GRAPHICS_API_OPENGL_ES2)
// NOTE: OpenGL ES 2.0 with no GL_OES_texture_npot support (i.e. WebGL) has limited NPOT support, so CLAMP_TO_EDGE must be used
if (RLGL.ExtSupported.texNPOT)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture to repeat on x-axis
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); // Set texture to repeat on y-axis
}
else
{
// NOTE: If using negative texture coordinates (LoadOBJ()), it does not work!
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); // Set texture to clamp on x-axis
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); // Set texture to clamp on y-axis
}
#else
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); // Set texture to repeat on x-axis
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); // Set texture to repeat on y-axis
#endif
// Magnification and minification filters
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); // Alternative: GL_LINEAR
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); // Alternative: GL_LINEAR
#if defined(GRAPHICS_API_OPENGL_33)
if (mipmapCount > 1)
{
// Activate Trilinear filtering if mipmaps are available
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
}
#endif
// At this point we have the texture loaded in GPU and texture parameters configured
// NOTE: If mipmaps were not in data, they are not generated automatically
// Unbind current texture
glBindTexture(GL_TEXTURE_2D, 0);
if (id > 0) TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Texture loaded successfully (%ix%i - %i mipmaps)", id, width, height, mipmapCount);
else TRACELOG(LOG_WARNING, "TEXTURE: Failed to load texture");
return id;
}
// Load depth texture/renderbuffer (to be attached to fbo)
// WARNING: OpenGL ES 2.0 requires GL_OES_depth_texture/WEBGL_depth_texture extensions
unsigned int rlLoadTextureDepth(int width, int height, bool useRenderBuffer)
{
unsigned int id = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// In case depth textures not supported, we force renderbuffer usage
if (!RLGL.ExtSupported.texDepth) useRenderBuffer = true;
// NOTE: We let the implementation to choose the best bit-depth
// Possible formats: GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT32 and GL_DEPTH_COMPONENT32F
unsigned int glInternalFormat = GL_DEPTH_COMPONENT;
#if defined(GRAPHICS_API_OPENGL_ES2)
if (RLGL.ExtSupported.maxDepthBits == 32) glInternalFormat = GL_DEPTH_COMPONENT32_OES;
else if (RLGL.ExtSupported.maxDepthBits == 24) glInternalFormat = GL_DEPTH_COMPONENT24_OES;
else glInternalFormat = GL_DEPTH_COMPONENT16;
#endif
if (!useRenderBuffer && RLGL.ExtSupported.texDepth)
{
glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_2D, id);
glTexImage2D(GL_TEXTURE_2D, 0, glInternalFormat, width, height, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glBindTexture(GL_TEXTURE_2D, 0);
TRACELOG(LOG_INFO, "TEXTURE: Depth texture loaded successfully");
}
else
{
// Create the renderbuffer that will serve as the depth attachment for the framebuffer
// NOTE: A renderbuffer is simpler than a texture and could offer better performance on embedded devices
glGenRenderbuffers(1, &id);
glBindRenderbuffer(GL_RENDERBUFFER, id);
glRenderbufferStorage(GL_RENDERBUFFER, glInternalFormat, width, height);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Depth renderbuffer loaded successfully (%i bits)", id, (RLGL.ExtSupported.maxDepthBits >= 24)? RLGL.ExtSupported.maxDepthBits : 16);
}
#endif
return id;
}
// Load texture cubemap
// NOTE: Cubemap data is expected to be 6 images in a single data array (one after the other),
// expected the following convention: +X, -X, +Y, -Y, +Z, -Z
unsigned int rlLoadTextureCubemap(void *data, int size, int format)
{
unsigned int id = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
unsigned int dataSize = rlGetPixelDataSize(size, size, format);
glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_CUBE_MAP, id);
unsigned int glInternalFormat, glFormat, glType;
rlGetGlTextureFormats(format, &glInternalFormat, &glFormat, &glType);
if (glInternalFormat != -1)
{
// Load cubemap faces
for (unsigned int i = 0; i < 6; i++)
{
if (data == NULL)
{
if (format < PIXELFORMAT_COMPRESSED_DXT1_RGB)
{
if (format == PIXELFORMAT_UNCOMPRESSED_R32G32B32)
{
// Instead of using a sized internal texture format (GL_RGB16F, GL_RGB32F), we let the driver to choose the better format for us (GL_RGB)
if (RLGL.ExtSupported.texFloat32) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGB, size, size, 0, GL_RGB, GL_FLOAT, NULL);
else TRACELOG(LOG_WARNING, "TEXTURES: Cubemap requested format not supported");
}
else if ((format == PIXELFORMAT_UNCOMPRESSED_R32) || (format == PIXELFORMAT_UNCOMPRESSED_R32G32B32A32)) TRACELOG(LOG_WARNING, "TEXTURES: Cubemap requested format not supported");
else glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, size, size, 0, glFormat, glType, NULL);
}
else TRACELOG(LOG_WARNING, "TEXTURES: Empty cubemap creation does not support compressed format");
}
else
{
if (format < PIXELFORMAT_COMPRESSED_DXT1_RGB) glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, size, size, 0, glFormat, glType, (unsigned char *)data + i*dataSize);
else glCompressedTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, size, size, 0, dataSize, (unsigned char *)data + i*dataSize);
}
#if defined(GRAPHICS_API_OPENGL_33)
if (format == PIXELFORMAT_UNCOMPRESSED_GRAYSCALE)
{
GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_ONE };
glTexParameteriv(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask);
}
else if (format == PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA)
{
#if defined(GRAPHICS_API_OPENGL_21)
GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_ALPHA };
#elif defined(GRAPHICS_API_OPENGL_33)
GLint swizzleMask[] = { GL_RED, GL_RED, GL_RED, GL_GREEN };
#endif
glTexParameteriv(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_SWIZZLE_RGBA, swizzleMask);
}
#endif
}
}
// Set cubemap texture sampling parameters
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#if defined(GRAPHICS_API_OPENGL_33)
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); // Flag not supported on OpenGL ES 2.0
#endif
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
#endif
if (id > 0) TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Cubemap texture loaded successfully (%ix%i)", id, size, size);
else TRACELOG(LOG_WARNING, "TEXTURE: Failed to load cubemap texture");
return id;
}
// Update already loaded texture in GPU with new data
// NOTE: We don't know safely if internal texture format is the expected one...
void rlUpdateTexture(unsigned int id, int offsetX, int offsetY, int width, int height, int format, const void *data)
{
glBindTexture(GL_TEXTURE_2D, id);
unsigned int glInternalFormat, glFormat, glType;
rlGetGlTextureFormats(format, &glInternalFormat, &glFormat, &glType);
if ((glInternalFormat != -1) && (format < PIXELFORMAT_COMPRESSED_DXT1_RGB))
{
glTexSubImage2D(GL_TEXTURE_2D, 0, offsetX, offsetY, width, height, glFormat, glType, (unsigned char *)data);
}
else TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] Failed to update for current texture format (%i)", id, format);
}
// Get OpenGL internal formats and data type from raylib PixelFormat
void rlGetGlTextureFormats(int format, unsigned int *glInternalFormat, unsigned int *glFormat, unsigned int *glType)
{
*glInternalFormat = -1;
*glFormat = -1;
*glType = -1;
switch (format)
{
#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_21) || defined(GRAPHICS_API_OPENGL_ES2)
// NOTE: on OpenGL ES 2.0 (WebGL), internalFormat must match format and options allowed are: GL_LUMINANCE, GL_RGB, GL_RGBA
case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: *glInternalFormat = GL_LUMINANCE; *glFormat = GL_LUMINANCE; *glType = GL_UNSIGNED_BYTE; break;
case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: *glInternalFormat = GL_LUMINANCE_ALPHA; *glFormat = GL_LUMINANCE_ALPHA; *glType = GL_UNSIGNED_BYTE; break;
case PIXELFORMAT_UNCOMPRESSED_R5G6B5: *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_UNSIGNED_SHORT_5_6_5; break;
case PIXELFORMAT_UNCOMPRESSED_RGB565_BE: *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_UNSIGNED_SHORT_5_6_5_REV; break;
case PIXELFORMAT_UNCOMPRESSED_R8G8B8: *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_UNSIGNED_BYTE; break;
case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_5_5_5_1; break;
case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_4_4_4_4; break;
case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_BYTE; break;
#if !defined(GRAPHICS_API_OPENGL_11)
case PIXELFORMAT_UNCOMPRESSED_R32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_LUMINANCE; *glFormat = GL_LUMINANCE; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case PIXELFORMAT_UNCOMPRESSED_R32G32B32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGB; *glFormat = GL_RGB; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGBA; *glFormat = GL_RGBA; *glType = GL_FLOAT; break; // NOTE: Requires extension OES_texture_float
#endif
#elif defined(GRAPHICS_API_OPENGL_33)
case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: *glInternalFormat = GL_R8; *glFormat = GL_RED; *glType = GL_UNSIGNED_BYTE; break;
case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA: *glInternalFormat = GL_RG8; *glFormat = GL_RG; *glType = GL_UNSIGNED_BYTE; break;
case PIXELFORMAT_UNCOMPRESSED_R5G6B5: *glInternalFormat = GL_RGB565; *glFormat = GL_RGB; *glType = GL_UNSIGNED_SHORT_5_6_5; break;
case PIXELFORMAT_UNCOMPRESSED_R8G8B8: *glInternalFormat = GL_RGB8; *glFormat = GL_RGB; *glType = GL_UNSIGNED_BYTE; break;
case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1: *glInternalFormat = GL_RGB5_A1; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_5_5_5_1; break;
case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: *glInternalFormat = GL_RGBA4; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_SHORT_4_4_4_4; break;
case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: *glInternalFormat = GL_RGBA8; *glFormat = GL_RGBA; *glType = GL_UNSIGNED_BYTE; break;
case PIXELFORMAT_UNCOMPRESSED_R32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_R32F; *glFormat = GL_RED; *glType = GL_FLOAT; break;
case PIXELFORMAT_UNCOMPRESSED_R32G32B32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGB32F; *glFormat = GL_RGB; *glType = GL_FLOAT; break;
case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: if (RLGL.ExtSupported.texFloat32) *glInternalFormat = GL_RGBA32F; *glFormat = GL_RGBA; *glType = GL_FLOAT; break;
#endif
#if !defined(GRAPHICS_API_OPENGL_11)
case PIXELFORMAT_COMPRESSED_DXT1_RGB: if (RLGL.ExtSupported.texCompDXT) *glInternalFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT; break;
case PIXELFORMAT_COMPRESSED_DXT1_RGBA: if (RLGL.ExtSupported.texCompDXT) *glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT; break;
case PIXELFORMAT_COMPRESSED_DXT3_RGBA: if (RLGL.ExtSupported.texCompDXT) *glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT; break;
case PIXELFORMAT_COMPRESSED_DXT5_RGBA: if (RLGL.ExtSupported.texCompDXT) *glInternalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT; break;
case PIXELFORMAT_COMPRESSED_ETC1_RGB: if (RLGL.ExtSupported.texCompETC1) *glInternalFormat = GL_ETC1_RGB8_OES; break; // NOTE: Requires OpenGL ES 2.0 or OpenGL 4.3
case PIXELFORMAT_COMPRESSED_ETC2_RGB: if (RLGL.ExtSupported.texCompETC2) *glInternalFormat = GL_COMPRESSED_RGB8_ETC2; break; // NOTE: Requires OpenGL ES 3.0 or OpenGL 4.3
case PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA: if (RLGL.ExtSupported.texCompETC2) *glInternalFormat = GL_COMPRESSED_RGBA8_ETC2_EAC; break; // NOTE: Requires OpenGL ES 3.0 or OpenGL 4.3
case PIXELFORMAT_COMPRESSED_PVRT_RGB: if (RLGL.ExtSupported.texCompPVRT) *glInternalFormat = GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG; break; // NOTE: Requires PowerVR GPU
case PIXELFORMAT_COMPRESSED_PVRT_RGBA: if (RLGL.ExtSupported.texCompPVRT) *glInternalFormat = GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG; break; // NOTE: Requires PowerVR GPU
case PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA: if (RLGL.ExtSupported.texCompASTC) *glInternalFormat = GL_COMPRESSED_RGBA_ASTC_4x4_KHR; break; // NOTE: Requires OpenGL ES 3.1 or OpenGL 4.3
case PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA: if (RLGL.ExtSupported.texCompASTC) *glInternalFormat = GL_COMPRESSED_RGBA_ASTC_8x8_KHR; break; // NOTE: Requires OpenGL ES 3.1 or OpenGL 4.3
#endif
default: TRACELOG(LOG_WARNING, "TEXTURE: Current format not supported (%i)", format); break;
}
}
// Unload texture from GPU memory
void rlUnloadTexture(unsigned int id)
{
glDeleteTextures(1, &id);
}
// Generate mipmap data for selected texture
void rlGenerateMipmaps(Texture2D *texture)
{
glBindTexture(GL_TEXTURE_2D, texture->id);
// Check if texture is power-of-two (POT)
bool texIsPOT = false;
if (((texture->width > 0) && ((texture->width & (texture->width - 1)) == 0)) &&
((texture->height > 0) && ((texture->height & (texture->height - 1)) == 0))) texIsPOT = true;
#if defined(GRAPHICS_API_OPENGL_11)
if (texIsPOT)
{
// WARNING: Manual mipmap generation only works for RGBA 32bit textures!
if (texture->format == PIXELFORMAT_UNCOMPRESSED_R8G8B8A8)
{
// Retrieve texture data from VRAM
void *texData = rlReadTexturePixels(*texture);
// NOTE: Texture data size is reallocated to fit mipmaps data
// NOTE: CPU mipmap generation only supports RGBA 32bit data
int mipmapCount = rlGenerateMipmapsData(texData, texture->width, texture->height);
int size = texture->width*texture->height*4;
int offset = size;
int mipWidth = texture->width/2;
int mipHeight = texture->height/2;
// Load the mipmaps
for (int level = 1; level < mipmapCount; level++)
{
glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA8, mipWidth, mipHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, (unsigned char *)texData + offset);
size = mipWidth*mipHeight*4;
offset += size;
mipWidth /= 2;
mipHeight /= 2;
}
texture->mipmaps = mipmapCount + 1;
RL_FREE(texData); // Once mipmaps have been generated and data has been uploaded to GPU VRAM, we can discard RAM data
TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] Mipmaps generated manually on CPU side, total: %i", texture->id, texture->mipmaps);
}
else TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] Failed to generate mipmaps for provided texture format", texture->id);
}
#endif
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if ((texIsPOT) || (RLGL.ExtSupported.texNPOT))
{
//glHint(GL_GENERATE_MIPMAP_HINT, GL_DONT_CARE); // Hint for mipmaps generation algorythm: GL_FASTEST, GL_NICEST, GL_DONT_CARE
glGenerateMipmap(GL_TEXTURE_2D); // Generate mipmaps automatically
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); // Activate Trilinear filtering for mipmaps
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
texture->mipmaps = 1 + (int)floor(log(MAX(texture->width, texture->height))/log(2));
TRACELOG(LOG_INFO, "TEXTURE: [ID %i] Mipmaps generated automatically, total: %i", texture->id, texture->mipmaps);
}
#endif
else TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] Failed to generate mipmaps", texture->id);
glBindTexture(GL_TEXTURE_2D, 0);
}
// Read texture pixel data
void *rlReadTexturePixels(Texture2D texture)
{
void *pixels = NULL;
#if defined(GRAPHICS_API_OPENGL_11) || defined(GRAPHICS_API_OPENGL_33)
glBindTexture(GL_TEXTURE_2D, texture.id);
// NOTE: Using texture.id, we can retrieve some texture info (but not on OpenGL ES 2.0)
// Possible texture info: GL_TEXTURE_RED_SIZE, GL_TEXTURE_GREEN_SIZE, GL_TEXTURE_BLUE_SIZE, GL_TEXTURE_ALPHA_SIZE
//int width, height, format;
//glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
//glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
//glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &format);
// NOTE: Each row written to or read from by OpenGL pixel operations like glGetTexImage are aligned to a 4 byte boundary by default, which may add some padding.
// Use glPixelStorei to modify padding with the GL_[UN]PACK_ALIGNMENT setting.
// GL_PACK_ALIGNMENT affects operations that read from OpenGL memory (glReadPixels, glGetTexImage, etc.)
// GL_UNPACK_ALIGNMENT affects operations that write to OpenGL memory (glTexImage, etc.)
glPixelStorei(GL_PACK_ALIGNMENT, 1);
unsigned int glInternalFormat, glFormat, glType;
rlGetGlTextureFormats(texture.format, &glInternalFormat, &glFormat, &glType);
unsigned int size = rlGetPixelDataSize(texture.width, texture.height, texture.format);
if ((glInternalFormat != -1) && (texture.format < PIXELFORMAT_COMPRESSED_DXT1_RGB))
{
pixels = RL_MALLOC(size);
glGetTexImage(GL_TEXTURE_2D, 0, glFormat, glType, pixels);
}
else TRACELOG(LOG_WARNING, "TEXTURE: [ID %i] Data retrieval not suported for pixel format (%i)", texture.id, texture.format);
glBindTexture(GL_TEXTURE_2D, 0);
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
// glGetTexImage() is not available on OpenGL ES 2.0
// Texture width and height are required on OpenGL ES 2.0. There is no way to get it from texture id.
// Two possible Options:
// 1 - Bind texture to color fbo attachment and glReadPixels()
// 2 - Create an fbo, activate it, render quad with texture, glReadPixels()
// We are using Option 1, just need to care for texture format on retrieval
// NOTE: This behaviour could be conditioned by graphic driver...
unsigned int fboId = rlLoadFramebuffer(texture.width, texture.height);
// TODO: Create depth texture/renderbuffer for fbo?
glBindFramebuffer(GL_FRAMEBUFFER, fboId);
glBindTexture(GL_TEXTURE_2D, 0);
// Attach our texture to FBO
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture.id, 0);
// We read data as RGBA because FBO texture is configured as RGBA, despite binding another texture format
pixels = (unsigned char *)RL_MALLOC(rlGetPixelDataSize(texture.width, texture.height, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8));
glReadPixels(0, 0, texture.width, texture.height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// Clean up temporal fbo
rlUnloadFramebuffer(fboId);
#endif
return pixels;
}
// Read screen pixel data (color buffer)
unsigned char *rlReadScreenPixels(int width, int height)
{
unsigned char *screenData = (unsigned char *)RL_CALLOC(width*height*4, sizeof(unsigned char));
// NOTE 1: glReadPixels returns image flipped vertically -> (0,0) is the bottom left corner of the framebuffer
// NOTE 2: We are getting alpha channel! Be careful, it can be transparent if not cleared properly!
glReadPixels(0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, screenData);
// Flip image vertically!
unsigned char *imgData = (unsigned char *)RL_MALLOC(width*height*4*sizeof(unsigned char));
for (int y = height - 1; y >= 0; y--)
{
for (int x = 0; x < (width*4); x++)
{
imgData[((height - 1) - y)*width*4 + x] = screenData[(y*width*4) + x]; // Flip line
// Set alpha component value to 255 (no trasparent image retrieval)
// NOTE: Alpha value has already been applied to RGB in framebuffer, we don't need it!
if (((x + 1)%4) == 0) imgData[((height - 1) - y)*width*4 + x] = 255;
}
}
RL_FREE(screenData);
return imgData; // NOTE: image data should be freed
}
// Framebuffer management (fbo)
//-----------------------------------------------------------------------------------------
// Load a framebuffer to be used for rendering
// NOTE: No textures attached
unsigned int rlLoadFramebuffer(int width, int height)
{
unsigned int fboId = 0;
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)) && defined(SUPPORT_RENDER_TEXTURES_HINT)
glGenFramebuffers(1, &fboId); // Create the framebuffer object
glBindFramebuffer(GL_FRAMEBUFFER, 0); // Unbind any framebuffer
#endif
return fboId;
}
// Attach color buffer texture to an fbo (unloads previous attachment)
// NOTE: Attach type: 0-Color, 1-Depth renderbuffer, 2-Depth texture
void rlFramebufferAttach(unsigned int fboId, unsigned int texId, int attachType, int texType, int mipLevel)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)) && defined(SUPPORT_RENDER_TEXTURES_HINT)
glBindFramebuffer(GL_FRAMEBUFFER, fboId);
switch (attachType)
{
case RL_ATTACHMENT_COLOR_CHANNEL0:
case RL_ATTACHMENT_COLOR_CHANNEL1:
case RL_ATTACHMENT_COLOR_CHANNEL2:
case RL_ATTACHMENT_COLOR_CHANNEL3:
case RL_ATTACHMENT_COLOR_CHANNEL4:
case RL_ATTACHMENT_COLOR_CHANNEL5:
case RL_ATTACHMENT_COLOR_CHANNEL6:
case RL_ATTACHMENT_COLOR_CHANNEL7:
{
if (texType == RL_ATTACHMENT_TEXTURE2D) glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + attachType, GL_TEXTURE_2D, texId, mipLevel);
else if (texType == RL_ATTACHMENT_RENDERBUFFER) glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + attachType, GL_RENDERBUFFER, texId);
else if (texType >= RL_ATTACHMENT_CUBEMAP_POSITIVE_X) glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + attachType, GL_TEXTURE_CUBE_MAP_POSITIVE_X + texType, texId, mipLevel);
} break;
case RL_ATTACHMENT_DEPTH:
{
if (texType == RL_ATTACHMENT_TEXTURE2D) glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, texId, mipLevel);
else if (texType == RL_ATTACHMENT_RENDERBUFFER) glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, texId);
} break;
case RL_ATTACHMENT_STENCIL:
{
if (texType == RL_ATTACHMENT_TEXTURE2D) glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, texId, mipLevel);
else if (texType == RL_ATTACHMENT_RENDERBUFFER) glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, texId);
} break;
default: break;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
#endif
}
// Verify render texture is complete
bool rlFramebufferComplete(unsigned int id)
{
bool result = false;
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)) && defined(SUPPORT_RENDER_TEXTURES_HINT)
glBindFramebuffer(GL_FRAMEBUFFER, id);
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE)
{
switch (status)
{
case GL_FRAMEBUFFER_UNSUPPORTED: TRACELOG(LOG_WARNING, "FBO: [ID %i] Framebuffer is unsupported", id); break;
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT: TRACELOG(LOG_WARNING, "FBO: [ID %i] Framebuffer has incomplete attachment", id); break;
#if defined(GRAPHICS_API_OPENGL_ES2)
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS: TRACELOG(LOG_WARNING, "FBO: [ID %i] Framebuffer has incomplete dimensions", id); break;
#endif
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT: TRACELOG(LOG_WARNING, "FBO: [ID %i] Framebuffer has a missing attachment", id); break;
default: break;
}
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
result = (status == GL_FRAMEBUFFER_COMPLETE);
#endif
return result;
}
// Unload framebuffer from GPU memory
// NOTE: All attached textures/cubemaps/renderbuffers are also deleted
void rlUnloadFramebuffer(unsigned int id)
{
#if (defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)) && defined(SUPPORT_RENDER_TEXTURES_HINT)
// Query depth attachment to automatically delete texture/renderbuffer
int depthType = 0, depthId = 0;
glBindFramebuffer(GL_FRAMEBUFFER, id); // Bind framebuffer to query depth texture type
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &depthType);
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &depthId);
unsigned int depthIdU = (unsigned int)depthId;
if (depthType == GL_RENDERBUFFER) glDeleteRenderbuffers(1, &depthIdU);
else if (depthType == GL_RENDERBUFFER) glDeleteTextures(1, &depthIdU);
// NOTE: If a texture object is deleted while its image is attached to the *currently bound* framebuffer,
// the texture image is automatically detached from the currently bound framebuffer.
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDeleteFramebuffers(1, &id);
TRACELOG(LOG_INFO, "FBO: [ID %i] Unloaded framebuffer from VRAM (GPU)", id);
#endif
}
// Vertex data management
//-----------------------------------------------------------------------------------------
// Load a new attributes buffer
unsigned int rlLoadVertexBuffer(void *buffer, int size, bool dynamic)
{
unsigned int id = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glGenBuffers(1, &id);
glBindBuffer(GL_ARRAY_BUFFER, id);
glBufferData(GL_ARRAY_BUFFER, size, buffer, dynamic? GL_DYNAMIC_DRAW : GL_STATIC_DRAW);
#endif
return id;
}
// Load a new attributes element buffer
unsigned int rlLoadVertexBufferElement(void *buffer, int size, bool dynamic)
{
unsigned int id = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glGenBuffers(1, &id);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, id);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, size, buffer, dynamic? GL_DYNAMIC_DRAW : GL_STATIC_DRAW);
#endif
return id;
}
void rlEnableVertexBuffer(unsigned int id)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glBindBuffer(GL_ARRAY_BUFFER, id);
#endif
}
void rlDisableVertexBuffer(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
}
void rlEnableVertexBufferElement(unsigned int id)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, id);
#endif
}
void rlDisableVertexBufferElement(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
#endif
}
// Update GPU buffer with new data
// NOTE: dataSize and offset must be provided in bytes
void rlUpdateVertexBuffer(int bufferId, void *data, int dataSize, int offset)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glBindBuffer(GL_ARRAY_BUFFER, bufferId);
glBufferSubData(GL_ARRAY_BUFFER, offset, dataSize, data);
#endif
}
bool rlEnableVertexArray(unsigned int vaoId)
{
bool result = false;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if (RLGL.ExtSupported.vao)
{
glBindVertexArray(vaoId);
result = true;
}
#endif
return result;
}
void rlDisableVertexArray(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if (RLGL.ExtSupported.vao) glBindVertexArray(0);
#endif
}
void rlEnableVertexAttribute(unsigned int index)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glEnableVertexAttribArray(index);
#endif
}
void rlDisableVertexAttribute(unsigned int index)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDisableVertexAttribArray(index);
#endif
}
void rlDrawVertexArray(int offset, int count)
{
glDrawArrays(GL_TRIANGLES, offset, count);
}
void rlDrawVertexArrayElements(int offset, int count, void *buffer)
{
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, (unsigned short*)buffer + offset);
}
void rlDrawVertexArrayInstanced(int offset, int count, int instances)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDrawArraysInstanced(GL_TRIANGLES, 0, count, instances);
#endif
}
void rlDrawVertexArrayElementsInstanced(int offset, int count, void *buffer, int instances)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDrawElementsInstanced(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, (unsigned short*)buffer + offset, instances);
#endif
}
#if defined(GRAPHICS_API_OPENGL_11)
void rlEnableStatePointer(int vertexAttribType, void *buffer)
{
if (buffer != NULL) glEnableClientState(vertexAttribType);
switch (vertexAttribType)
{
case GL_VERTEX_ARRAY: glVertexPointer(3, GL_FLOAT, 0, buffer); break;
case GL_TEXTURE_COORD_ARRAY: glTexCoordPointer(2, GL_FLOAT, 0, buffer); break;
case GL_NORMAL_ARRAY: if (buffer != NULL) glNormalPointer(GL_FLOAT, 0, buffer); break;
case GL_COLOR_ARRAY: if (buffer != NULL) glColorPointer(4, GL_UNSIGNED_BYTE, 0, buffer); break;
//case GL_INDEX_ARRAY: if (buffer != NULL) glIndexPointer(GL_SHORT, 0, buffer); break; // Indexed colors
default: break;
}
}
void rlDisableStatePointer(int vertexAttribType)
{
glDisableClientState(vertexAttribType);
}
#endif
unsigned int rlLoadVertexArray(void)
{
unsigned int vaoId = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glGenVertexArrays(1, &vaoId);
#endif
return vaoId;
}
void rlSetVertexAttribute(unsigned int index, int compSize, int type, bool normalized, int stride, void *pointer)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glVertexAttribPointer(index, compSize, type, normalized, stride, pointer);
#endif
}
void rlSetVertexAttributeDivisor(unsigned int index, int divisor)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glVertexAttribDivisor(index, divisor);
#endif
}
void rlUnloadVertexArray(unsigned int vaoId)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if (RLGL.ExtSupported.vao)
{
glBindVertexArray(0);
glDeleteVertexArrays(1, &vaoId);
TRACELOG(LOG_INFO, "VAO: [ID %i] Unloaded vertex array data from VRAM (GPU)", vaoId);
}
#endif
}
void rlUnloadVertexBuffer(unsigned int vboId)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDeleteBuffers(1, &vboId);
//TRACELOG(LOG_INFO, "VBO: Unloaded vertex data from VRAM (GPU)");
#endif
}
// Shaders management
//-----------------------------------------------------------------------------------------------
// Load shader from code strings
// NOTE: If shader string is NULL, using default vertex/fragment shaders
unsigned int rlLoadShaderCode(const char *vsCode, const char *fsCode)
{
unsigned int id = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
unsigned int vertexShaderId = RLGL.State.defaultVShaderId;
unsigned int fragmentShaderId = RLGL.State.defaultFShaderId;
if (vsCode != NULL) vertexShaderId = rlCompileShader(vsCode, GL_VERTEX_SHADER);
if (fsCode != NULL) fragmentShaderId = rlCompileShader(fsCode, GL_FRAGMENT_SHADER);
if ((vertexShaderId == RLGL.State.defaultVShaderId) && (fragmentShaderId == RLGL.State.defaultFShaderId)) id = RLGL.State.defaultShader.id;
else
{
id = rlLoadShaderProgram(vertexShaderId, fragmentShaderId);
if (vertexShaderId != RLGL.State.defaultVShaderId)
{
// Detach shader before deletion to make sure memory is freed
glDetachShader(id, vertexShaderId);
glDeleteShader(vertexShaderId);
}
if (fragmentShaderId != RLGL.State.defaultFShaderId)
{
// Detach shader before deletion to make sure memory is freed
glDetachShader(id, fragmentShaderId);
glDeleteShader(fragmentShaderId);
}
if (id == 0)
{
TRACELOG(LOG_WARNING, "SHADER: Failed to load custom shader code");
id = RLGL.State.defaultShader.id;
}
}
// Get available shader uniforms
// NOTE: This information is useful for debug...
int uniformCount = -1;
glGetProgramiv(id, GL_ACTIVE_UNIFORMS, &uniformCount);
for (int i = 0; i < uniformCount; i++)
{
int namelen = -1;
int num = -1;
char name[256]; // Assume no variable names longer than 256
GLenum type = GL_ZERO;
// Get the name of the uniforms
glGetActiveUniform(id, i, sizeof(name) - 1, &namelen, &num, &type, name);
name[namelen] = 0;
TRACELOGD("SHADER: [ID %i] Active uniform (%s) set at location: %i", id, name, glGetUniformLocation(id, name));
}
#endif
return id;
}
// Compile custom shader and return shader id
unsigned int rlCompileShader(const char *shaderCode, int type)
{
unsigned int shader = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
shader = glCreateShader(type);
glShaderSource(shader, 1, &shaderCode, NULL);
GLint success = 0;
glCompileShader(shader);
glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
if (success == GL_FALSE)
{
switch (type)
{
case GL_VERTEX_SHADER: TRACELOG(LOG_WARNING, "SHADER: [ID %i] Failed to compile vertex shader code", shader); break;
case GL_FRAGMENT_SHADER: TRACELOG(LOG_WARNING, "SHADER: [ID %i] Failed to compile fragment shader code", shader); break;
//case GL_GEOMETRY_SHADER:
//case GL_COMPUTE_SHADER:
default: break;
}
int maxLength = 0;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &maxLength);
if (maxLength > 0)
{
int length = 0;
char *log = RL_CALLOC(maxLength, sizeof(char));
glGetShaderInfoLog(shader, maxLength, &length, log);
TRACELOG(LOG_WARNING, "SHADER: [ID %i] Compile error: %s", shader, log);
RL_FREE(log);
}
}
else
{
switch (type)
{
case GL_VERTEX_SHADER: TRACELOG(LOG_INFO, "SHADER: [ID %i] Vertex shader compiled successfully", shader); break;
case GL_FRAGMENT_SHADER: TRACELOG(LOG_INFO, "SHADER: [ID %i] Fragment shader compiled successfully", shader); break;
//case GL_GEOMETRY_SHADER:
//case GL_COMPUTE_SHADER:
default: break;
}
}
#endif
return shader;
}
// Load custom shader strings and return program id
unsigned int rlLoadShaderProgram(unsigned int vShaderId, unsigned int fShaderId)
{
unsigned int program = 0;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
GLint success = 0;
program = glCreateProgram();
glAttachShader(program, vShaderId);
glAttachShader(program, fShaderId);
// NOTE: Default attribute shader locations must be binded before linking
glBindAttribLocation(program, 0, DEFAULT_SHADER_ATTRIB_NAME_POSITION);
glBindAttribLocation(program, 1, DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD);
glBindAttribLocation(program, 2, DEFAULT_SHADER_ATTRIB_NAME_NORMAL);
glBindAttribLocation(program, 3, DEFAULT_SHADER_ATTRIB_NAME_COLOR);
glBindAttribLocation(program, 4, DEFAULT_SHADER_ATTRIB_NAME_TANGENT);
glBindAttribLocation(program, 5, DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD2);
// NOTE: If some attrib name is no found on the shader, it locations becomes -1
glLinkProgram(program);
// NOTE: All uniform variables are intitialised to 0 when a program links
glGetProgramiv(program, GL_LINK_STATUS, &success);
if (success == GL_FALSE)
{
TRACELOG(LOG_WARNING, "SHADER: [ID %i] Failed to link shader program", program);
int maxLength = 0;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &maxLength);
if (maxLength > 0)
{
int length = 0;
char *log = RL_CALLOC(maxLength, sizeof(char));
glGetProgramInfoLog(program, maxLength, &length, log);
TRACELOG(LOG_WARNING, "SHADER: [ID %i] Link error: %s", program, log);
RL_FREE(log);
}
glDeleteProgram(program);
program = 0;
}
else TRACELOG(LOG_INFO, "SHADER: [ID %i] Program shader loaded successfully", program);
#endif
return program;
}
// Unload shader program
void rlUnloadShaderProgram(unsigned int id)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDeleteProgram(id);
TRACELOG(LOG_INFO, "SHADER: [ID %i] Unloaded shader program data from VRAM (GPU)", id);
#endif
}
// Get shader location uniform
int rlGetLocationUniform(unsigned int shaderId, const char *uniformName)
{
int location = -1;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
location = glGetUniformLocation(shaderId, uniformName);
if (location == -1) TRACELOG(LOG_WARNING, "SHADER: [ID %i] Failed to find shader uniform: %s", shaderId, uniformName);
else TRACELOG(LOG_INFO, "SHADER: [ID %i] Shader uniform (%s) set at location: %i", shaderId, uniformName, location);
#endif
return location;
}
// Get shader location attribute
int rlGetLocationAttrib(unsigned int shaderId, const char *attribName)
{
int location = -1;
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
location = glGetAttribLocation(shaderId, attribName);
if (location == -1) TRACELOG(LOG_WARNING, "SHADER: [ID %i] Failed to find shader attribute: %s", shaderId, attribName);
else TRACELOG(LOG_INFO, "SHADER: [ID %i] Shader attribute (%s) set at location: %i", shaderId, attribName, location);
#endif
return location;
}
// Set shader value uniform
void rlSetUniform(int locIndex, const void *value, int uniformType, int count)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
switch (uniformType)
{
case SHADER_UNIFORM_FLOAT: glUniform1fv(locIndex, count, (float *)value); break;
case SHADER_UNIFORM_VEC2: glUniform2fv(locIndex, count, (float *)value); break;
case SHADER_UNIFORM_VEC3: glUniform3fv(locIndex, count, (float *)value); break;
case SHADER_UNIFORM_VEC4: glUniform4fv(locIndex, count, (float *)value); break;
case SHADER_UNIFORM_INT: glUniform1iv(locIndex, count, (int *)value); break;
case SHADER_UNIFORM_IVEC2: glUniform2iv(locIndex, count, (int *)value); break;
case SHADER_UNIFORM_IVEC3: glUniform3iv(locIndex, count, (int *)value); break;
case SHADER_UNIFORM_IVEC4: glUniform4iv(locIndex, count, (int *)value); break;
case SHADER_UNIFORM_SAMPLER2D: glUniform1iv(locIndex, count, (int *)value); break;
default: TRACELOG(LOG_WARNING, "SHADER: Failed to set uniform value, data type not recognized");
}
#endif
}
// Set shader value attribute
void rlSetVertexAttributeDefault(int locIndex, const void *value, int attribType, int count)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
switch (attribType)
{
case SHADER_ATTRIB_FLOAT: if (count == 1) glVertexAttrib1fv(locIndex, (float *)value); break;
case SHADER_ATTRIB_VEC2: if (count == 2) glVertexAttrib2fv(locIndex, (float *)value); break;
case SHADER_ATTRIB_VEC3: if (count == 3) glVertexAttrib3fv(locIndex, (float *)value); break;
case SHADER_ATTRIB_VEC4: if (count == 4) glVertexAttrib4fv(locIndex, (float *)value); break;
default: TRACELOG(LOG_WARNING, "SHADER: Failed to set attrib default value, data type not recognized");
}
#endif
}
// Set shader value uniform matrix
void rlSetUniformMatrix(int locIndex, Matrix mat)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glUniformMatrix4fv(locIndex, 1, false, MatrixToFloat(mat));
#endif
}
// Set shader value uniform sampler
void rlSetUniformSampler(int locIndex, unsigned int textureId)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Check if texture is already active
for (int i = 0; i < MAX_BATCH_ACTIVE_TEXTURES; i++) if (RLGL.State.activeTextureId[i] == textureId) return;
// Register a new active texture for the internal batch system
// NOTE: Default texture is always activated as GL_TEXTURE0
for (int i = 0; i < MAX_BATCH_ACTIVE_TEXTURES; i++)
{
if (RLGL.State.activeTextureId[i] == 0)
{
glUniform1i(locIndex, 1 + i); // Activate new texture unit
RLGL.State.activeTextureId[i] = textureId; // Save texture id for binding on drawing
break;
}
}
#endif
}
// Set shader currently active
void rlSetShader(Shader shader)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
if (RLGL.State.currentShader.id != shader.id)
{
rlDrawRenderBatch(RLGL.currentBatch);
RLGL.State.currentShader = shader;
}
#endif
}
// Matrix state management
//-----------------------------------------------------------------------------------------
// Return internal modelview matrix
Matrix rlGetMatrixModelview(void)
{
Matrix matrix = MatrixIdentity();
#if defined(GRAPHICS_API_OPENGL_11)
float mat[16];
glGetFloatv(GL_MODELVIEW_MATRIX, mat);
matrix.m0 = mat[0]; matrix.m1 = mat[1]; matrix.m2 = mat[2]; matrix.m3 = mat[3];
matrix.m4 = mat[4]; matrix.m5 = mat[5]; matrix.m6 = mat[6]; matrix.m7 = mat[7];
matrix.m8 = mat[8]; matrix.m9 = mat[9]; matrix.m10 = mat[10]; matrix.m11 = mat[11];
matrix.m12 = mat[12]; matrix.m13 = mat[13]; matrix.m14 = mat[14]; matrix.m15 = mat[15];
#else
matrix = RLGL.State.modelview;
#endif
return matrix;
}
// Return internal projection matrix
Matrix rlGetMatrixProjection(void)
{
#if defined(GRAPHICS_API_OPENGL_11)
float mat[16];
glGetFloatv(GL_PROJECTION_MATRIX,mat);
Matrix m;
m.m0 = mat[0]; m.m1 = mat[1]; m.m2 = mat[2]; m.m3 = mat[3];
m.m4 = mat[4]; m.m5 = mat[5]; m.m6 = mat[6]; m.m7 = mat[7];
m.m8 = mat[8]; m.m9 = mat[9]; m.m10 = mat[10]; m.m11 = mat[11];
m.m12 = mat[12]; m.m13 = mat[13]; m.m14 = mat[14]; m.m15 = mat[15];
return m;
#else
return RLGL.State.projection;
#endif
}
// Get internal accumulated transform matrix
Matrix rlGetMatrixTransform(void)
{
Matrix mat = MatrixIdentity();
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// TODO: Consider possible transform matrices in the RLGL.State.stack
// Is this the right order? or should we start with the first stored matrix instead of the last one?
//Matrix matStackTransform = MatrixIdentity();
//for (int i = RLGL.State.stackCounter; i > 0; i--) matStackTransform = MatrixMultiply(RLGL.State.stack[i], matStackTransform);
mat = RLGL.State.transform;
#endif
return mat;
}
// Get internal projection matrix for stereo render (selected eye)
RLAPI Matrix rlGetMatrixProjectionStereo(int eye)
{
Matrix mat = MatrixIdentity();
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
mat = RLGL.State.projectionStereo[eye];
#endif
return mat;
}
// Get internal view offset matrix for stereo render (selected eye)
RLAPI Matrix rlGetMatrixViewOffsetStereo(int eye)
{
Matrix mat = MatrixIdentity();
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
mat = RLGL.State.viewOffsetStereo[eye];
#endif
return mat;
}
// Set a custom modelview matrix (replaces internal modelview matrix)
void rlSetMatrixModelview(Matrix view)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
RLGL.State.modelview = view;
#endif
}
// Set a custom projection matrix (replaces internal projection matrix)
void rlSetMatrixProjection(Matrix projection)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
RLGL.State.projection = projection;
#endif
}
// Set eyes projection matrices for stereo rendering
void rlSetMatrixProjectionStereo(Matrix right, Matrix left)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
RLGL.State.projectionStereo[0] = right;
RLGL.State.projectionStereo[1] = left;
#endif
}
// Set eyes view offsets matrices for stereo rendering
void rlSetMatrixViewOffsetStereo(Matrix right, Matrix left)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
RLGL.State.viewOffsetStereo[0] = right;
RLGL.State.viewOffsetStereo[1] = left;
#endif
}
// Load and draw a 1x1 XY quad in NDC
void rlLoadDrawQuad(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
unsigned int quadVAO = 0;
unsigned int quadVBO = 0;
float vertices[] = {
// Positions Texcoords
-1.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
1.0f, 1.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
};
// Gen VAO to contain VBO
glGenVertexArrays(1, &quadVAO);
glBindVertexArray(quadVAO);
// Gen and fill vertex buffer (VBO)
glGenBuffers(1, &quadVBO);
glBindBuffer(GL_ARRAY_BUFFER, quadVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), &vertices, GL_STATIC_DRAW);
// Bind vertex attributes (position, texcoords)
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void *)0); // Positions
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void *)(3*sizeof(float))); // Texcoords
// Draw quad
glBindVertexArray(quadVAO);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindVertexArray(0);
// Delete buffers (VBO and VAO)
glDeleteBuffers(1, &quadVBO);
glDeleteVertexArrays(1, &quadVAO);
#endif
}
// Load and draw a 1x1 3D cube in NDC
void rlLoadDrawCube(void)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
unsigned int cubeVAO = 0;
unsigned int cubeVBO = 0;
float vertices[] = {
// Positions Normals Texcoords
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f
};
// Gen VAO to contain VBO
glGenVertexArrays(1, &cubeVAO);
glBindVertexArray(cubeVAO);
// Gen and fill vertex buffer (VBO)
glGenBuffers(1, &cubeVBO);
glBindBuffer(GL_ARRAY_BUFFER, cubeVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// Bind vertex attributes (position, normals, texcoords)
glBindVertexArray(cubeVAO);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)0); // Positions
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)(3*sizeof(float))); // Normals
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)(6*sizeof(float))); // Texcoords
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
// Draw cube
glBindVertexArray(cubeVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
// Delete VBO and VAO
glDeleteBuffers(1, &cubeVBO);
glDeleteVertexArrays(1, &cubeVAO);
#endif
}
//----------------------------------------------------------------------------------
// Module specific Functions Definition
//----------------------------------------------------------------------------------
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
// Load default shader (just vertex positioning and texture coloring)
// NOTE: This shader program is used for internal buffers
// NOTE: It uses global variable: RLGL.State.defaultShader
static void rlLoadShaderDefault(void)
{
RLGL.State.defaultShader.locs = (int *)RL_CALLOC(MAX_SHADER_LOCATIONS, sizeof(int));
// NOTE: All locations must be reseted to -1 (no location)
for (int i = 0; i < MAX_SHADER_LOCATIONS; i++) RLGL.State.defaultShader.locs[i] = -1;
// Vertex shader directly defined, no external file required
const char *vShaderDefault =
#if defined(GRAPHICS_API_OPENGL_21)
"#version 120 \n"
"attribute vec3 vertexPosition; \n"
"attribute vec2 vertexTexCoord; \n"
"attribute vec4 vertexColor; \n"
"varying vec2 fragTexCoord; \n"
"varying vec4 fragColor; \n"
#elif defined(GRAPHICS_API_OPENGL_33)
"#version 330 \n"
"in vec3 vertexPosition; \n"
"in vec2 vertexTexCoord; \n"
"in vec4 vertexColor; \n"
"out vec2 fragTexCoord; \n"
"out vec4 fragColor; \n"
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
"#version 100 \n"
"attribute vec3 vertexPosition; \n"
"attribute vec2 vertexTexCoord; \n"
"attribute vec4 vertexColor; \n"
"varying vec2 fragTexCoord; \n"
"varying vec4 fragColor; \n"
#endif
"uniform mat4 mvp; \n"
"void main() \n"
"{ \n"
" fragTexCoord = vertexTexCoord; \n"
" fragColor = vertexColor; \n"
" gl_Position = mvp*vec4(vertexPosition, 1.0); \n"
"} \n";
// Fragment shader directly defined, no external file required
const char *fShaderDefault =
#if defined(GRAPHICS_API_OPENGL_21)
"#version 120 \n"
"varying vec2 fragTexCoord; \n"
"varying vec4 fragColor; \n"
"uniform sampler2D texture0; \n"
"uniform vec4 colDiffuse; \n"
"void main() \n"
"{ \n"
" vec4 texelColor = texture2D(texture0, fragTexCoord); \n"
" gl_FragColor = texelColor*colDiffuse*fragColor; \n"
"} \n";
#elif defined(GRAPHICS_API_OPENGL_33)
"#version 330 \n"
"in vec2 fragTexCoord; \n"
"in vec4 fragColor; \n"
"out vec4 finalColor; \n"
"uniform sampler2D texture0; \n"
"uniform vec4 colDiffuse; \n"
"void main() \n"
"{ \n"
" vec4 texelColor = texture(texture0, fragTexCoord); \n"
" finalColor = texelColor*colDiffuse*fragColor; \n"
"} \n";
#endif
#if defined(GRAPHICS_API_OPENGL_ES2)
"#version 100 \n"
"precision mediump float; \n" // Precision required for OpenGL ES2 (WebGL)
"varying vec2 fragTexCoord; \n"
"varying vec4 fragColor; \n"
"uniform sampler2D texture0; \n"
"uniform vec4 colDiffuse; \n"
"void main() \n"
"{ \n"
" vec4 texelColor = texture2D(texture0, fragTexCoord); \n"
" gl_FragColor = texelColor*colDiffuse*fragColor; \n"
"} \n";
#endif
// NOTE: Compiled vertex/fragment shaders are kept for re-use
RLGL.State.defaultVShaderId = rlCompileShader(vShaderDefault, GL_VERTEX_SHADER); // Compile default vertex shader
RLGL.State.defaultFShaderId = rlCompileShader(fShaderDefault, GL_FRAGMENT_SHADER); // Compile default fragment shader
RLGL.State.defaultShader.id = rlLoadShaderProgram(RLGL.State.defaultVShaderId, RLGL.State.defaultFShaderId);
if (RLGL.State.defaultShader.id > 0)
{
TRACELOG(LOG_INFO, "SHADER: [ID %i] Default shader loaded successfully", RLGL.State.defaultShader.id);
// Set default shader locations: attributes locations
RLGL.State.defaultShader.locs[SHADER_LOC_VERTEX_POSITION] = glGetAttribLocation(RLGL.State.defaultShader.id, "vertexPosition");
RLGL.State.defaultShader.locs[SHADER_LOC_VERTEX_TEXCOORD01] = glGetAttribLocation(RLGL.State.defaultShader.id, "vertexTexCoord");
RLGL.State.defaultShader.locs[SHADER_LOC_VERTEX_COLOR] = glGetAttribLocation(RLGL.State.defaultShader.id, "vertexColor");
// Set default shader locations: uniform locations
RLGL.State.defaultShader.locs[SHADER_LOC_MATRIX_MVP] = glGetUniformLocation(RLGL.State.defaultShader.id, "mvp");
RLGL.State.defaultShader.locs[SHADER_LOC_COLOR_DIFFUSE] = glGetUniformLocation(RLGL.State.defaultShader.id, "colDiffuse");
RLGL.State.defaultShader.locs[SHADER_LOC_MAP_DIFFUSE] = glGetUniformLocation(RLGL.State.defaultShader.id, "texture0");
}
else TRACELOG(LOG_WARNING, "SHADER: [ID %i] Failed to load default shader", RLGL.State.defaultShader.id);
}
// Unload default shader
// NOTE: It uses global variable: RLGL.State.defaultShader
static void rlUnloadShaderDefault(void)
{
glUseProgram(0);
glDetachShader(RLGL.State.defaultShader.id, RLGL.State.defaultVShaderId);
glDetachShader(RLGL.State.defaultShader.id, RLGL.State.defaultFShaderId);
glDeleteShader(RLGL.State.defaultVShaderId);
glDeleteShader(RLGL.State.defaultFShaderId);
glDeleteProgram(RLGL.State.defaultShader.id);
RL_FREE(RLGL.State.defaultShader.locs);
TRACELOG(LOG_INFO, "SHADER: [ID %i] Default shader unloaded successfully", RLGL.State.defaultShader.id);
}
#if defined(SUPPORT_GL_DETAILS_INFO)
// Get compressed format official GL identifier name
static char *rlGetCompressedFormatName(int format)
{
static char compName[64] = { 0 };
memset(compName, 0, 64);
switch (format)
{
// GL_EXT_texture_compression_s3tc
case 0x83F0: strcpy(compName, "GL_COMPRESSED_RGB_S3TC_DXT1_EXT"); break;
case 0x83F1: strcpy(compName, "GL_COMPRESSED_RGBA_S3TC_DXT1_EXT"); break;
case 0x83F2: strcpy(compName, "GL_COMPRESSED_RGBA_S3TC_DXT3_EXT"); break;
case 0x83F3: strcpy(compName, "GL_COMPRESSED_RGBA_S3TC_DXT5_EXT"); break;
// GL_3DFX_texture_compression_FXT1
case 0x86B0: strcpy(compName, "GL_COMPRESSED_RGB_FXT1_3DFX"); break;
case 0x86B1: strcpy(compName, "GL_COMPRESSED_RGBA_FXT1_3DFX"); break;
// GL_IMG_texture_compression_pvrtc
case 0x8C00: strcpy(compName, "GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG"); break;
case 0x8C01: strcpy(compName, "GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG"); break;
case 0x8C02: strcpy(compName, "GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG"); break;
case 0x8C03: strcpy(compName, "GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG"); break;
// GL_OES_compressed_ETC1_RGB8_texture
case 0x8D64: strcpy(compName, "GL_ETC1_RGB8_OES"); break;
// GL_ARB_texture_compression_rgtc
case 0x8DBB: strcpy(compName, "GL_COMPRESSED_RED_RGTC1"); break;
case 0x8DBC: strcpy(compName, "GL_COMPRESSED_SIGNED_RED_RGTC1"); break;
case 0x8DBD: strcpy(compName, "GL_COMPRESSED_RG_RGTC2"); break;
case 0x8DBE: strcpy(compName, "GL_COMPRESSED_SIGNED_RG_RGTC2"); break;
// GL_ARB_texture_compression_bptc
case 0x8E8C: strcpy(compName, "GL_COMPRESSED_RGBA_BPTC_UNORM_ARB"); break;
case 0x8E8D: strcpy(compName, "GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB"); break;
case 0x8E8E: strcpy(compName, "GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB"); break;
case 0x8E8F: strcpy(compName, "GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB"); break;
// GL_ARB_ES3_compatibility
case 0x9274: strcpy(compName, "GL_COMPRESSED_RGB8_ETC2"); break;
case 0x9275: strcpy(compName, "GL_COMPRESSED_SRGB8_ETC2"); break;
case 0x9276: strcpy(compName, "GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2"); break;
case 0x9277: strcpy(compName, "GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2"); break;
case 0x9278: strcpy(compName, "GL_COMPRESSED_RGBA8_ETC2_EAC"); break;
case 0x9279: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC"); break;
case 0x9270: strcpy(compName, "GL_COMPRESSED_R11_EAC"); break;
case 0x9271: strcpy(compName, "GL_COMPRESSED_SIGNED_R11_EAC"); break;
case 0x9272: strcpy(compName, "GL_COMPRESSED_RG11_EAC"); break;
case 0x9273: strcpy(compName, "GL_COMPRESSED_SIGNED_RG11_EAC"); break;
// GL_KHR_texture_compression_astc_hdr
case 0x93B0: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_4x4_KHR"); break;
case 0x93B1: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_5x4_KHR"); break;
case 0x93B2: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_5x5_KHR"); break;
case 0x93B3: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_6x5_KHR"); break;
case 0x93B4: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_6x6_KHR"); break;
case 0x93B5: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_8x5_KHR"); break;
case 0x93B6: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_8x6_KHR"); break;
case 0x93B7: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_8x8_KHR"); break;
case 0x93B8: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_10x5_KHR"); break;
case 0x93B9: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_10x6_KHR"); break;
case 0x93BA: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_10x8_KHR"); break;
case 0x93BB: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_10x10_KHR"); break;
case 0x93BC: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_12x10_KHR"); break;
case 0x93BD: strcpy(compName, "GL_COMPRESSED_RGBA_ASTC_12x12_KHR"); break;
case 0x93D0: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR"); break;
case 0x93D1: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR"); break;
case 0x93D2: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR"); break;
case 0x93D3: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR"); break;
case 0x93D4: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR"); break;
case 0x93D5: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR"); break;
case 0x93D6: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR"); break;
case 0x93D7: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR"); break;
case 0x93D8: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR"); break;
case 0x93D9: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR"); break;
case 0x93DA: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR"); break;
case 0x93DB: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR"); break;
case 0x93DC: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR"); break;
case 0x93DD: strcpy(compName, "GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR"); break;
default: strcpy(compName, "GL_COMPRESSED_UNKNOWN"); break;
}
return compName;
}
#endif // SUPPORT_GL_DETAILS_INFO
#endif // GRAPHICS_API_OPENGL_33 || GRAPHICS_API_OPENGL_ES2
#if defined(GRAPHICS_API_OPENGL_11)
// Mipmaps data is generated after image data
// NOTE: Only works with RGBA (4 bytes) data!
static int rlGenerateMipmapsData(unsigned char *data, int baseWidth, int baseHeight)
{
int mipmapCount = 1; // Required mipmap levels count (including base level)
int width = baseWidth;
int height = baseHeight;
int size = baseWidth*baseHeight*4; // Size in bytes (will include mipmaps...), RGBA only
// Count mipmap levels required
while ((width != 1) && (height != 1))
{
width /= 2;
height /= 2;
TRACELOGD("TEXTURE: Next mipmap size: %i x %i", width, height);
mipmapCount++;
size += (width*height*4); // Add mipmap size (in bytes)
}
TRACELOGD("TEXTURE: Total mipmaps required: %i", mipmapCount);
TRACELOGD("TEXTURE: Total size of data required: %i", size);
unsigned char *temp = RL_REALLOC(data, size);
if (temp != NULL) data = temp;
else TRACELOG(LOG_WARNING, "TEXTURE: Failed to re-allocate required mipmaps memory");
width = baseWidth;
height = baseHeight;
size = (width*height*4);
// Generate mipmaps
// NOTE: Every mipmap data is stored after data
Color *image = (Color *)RL_MALLOC(width*height*sizeof(Color));
Color *mipmap = NULL;
int offset = 0;
int j = 0;
for (int i = 0; i < size; i += 4)
{
image[j].r = data[i];
image[j].g = data[i + 1];
image[j].b = data[i + 2];
image[j].a = data[i + 3];
j++;
}
TRACELOGD("TEXTURE: Mipmap base size (%ix%i)", width, height);
for (int mip = 1; mip < mipmapCount; mip++)
{
mipmap = rlGenNextMipmapData(image, width, height);
offset += (width*height*4); // Size of last mipmap
j = 0;
width /= 2;
height /= 2;
size = (width*height*4); // Mipmap size to store after offset
// Add mipmap to data
for (int i = 0; i < size; i += 4)
{
data[offset + i] = mipmap[j].r;
data[offset + i + 1] = mipmap[j].g;
data[offset + i + 2] = mipmap[j].b;
data[offset + i + 3] = mipmap[j].a;
j++;
}
RL_FREE(image);
image = mipmap;
mipmap = NULL;
}
RL_FREE(mipmap); // free mipmap data
return mipmapCount;
}
// Manual mipmap generation (basic scaling algorithm)
static Color *rlGenNextMipmapData(Color *srcData, int srcWidth, int srcHeight)
{
int x2, y2;
Color prow, pcol;
int width = srcWidth/2;
int height = srcHeight/2;
Color *mipmap = (Color *)RL_MALLOC(width*height*sizeof(Color));
// Scaling algorithm works perfectly (box-filter)
for (int y = 0; y < height; y++)
{
y2 = 2*y;
for (int x = 0; x < width; x++)
{
x2 = 2*x;
prow.r = (srcData[y2*srcWidth + x2].r + srcData[y2*srcWidth + x2 + 1].r)/2;
prow.g = (srcData[y2*srcWidth + x2].g + srcData[y2*srcWidth + x2 + 1].g)/2;
prow.b = (srcData[y2*srcWidth + x2].b + srcData[y2*srcWidth + x2 + 1].b)/2;
prow.a = (srcData[y2*srcWidth + x2].a + srcData[y2*srcWidth + x2 + 1].a)/2;
pcol.r = (srcData[(y2+1)*srcWidth + x2].r + srcData[(y2+1)*srcWidth + x2 + 1].r)/2;
pcol.g = (srcData[(y2+1)*srcWidth + x2].g + srcData[(y2+1)*srcWidth + x2 + 1].g)/2;
pcol.b = (srcData[(y2+1)*srcWidth + x2].b + srcData[(y2+1)*srcWidth + x2 + 1].b)/2;
pcol.a = (srcData[(y2+1)*srcWidth + x2].a + srcData[(y2+1)*srcWidth + x2 + 1].a)/2;
mipmap[y*width + x].r = (prow.r + pcol.r)/2;
mipmap[y*width + x].g = (prow.g + pcol.g)/2;
mipmap[y*width + x].b = (prow.b + pcol.b)/2;
mipmap[y*width + x].a = (prow.a + pcol.a)/2;
}
}
TRACELOGD("TEXTURE: Mipmap generated successfully (%ix%i)", width, height);
return mipmap;
}
#endif // GRAPHICS_API_OPENGL_11
// Get pixel data size in bytes (image or texture)
// NOTE: Size depends on pixel format
static int rlGetPixelDataSize(int width, int height, int format)
{
int dataSize = 0; // Size in bytes
int bpp = 0; // Bits per pixel
switch (format)
{
case PIXELFORMAT_UNCOMPRESSED_GRAYSCALE: bpp = 8; break;
case PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA:
case PIXELFORMAT_UNCOMPRESSED_R5G6B5:
case PIXELFORMAT_UNCOMPRESSED_R5G5B5A1:
case PIXELFORMAT_UNCOMPRESSED_R4G4B4A4: bpp = 16; break;
case PIXELFORMAT_UNCOMPRESSED_R8G8B8A8: bpp = 32; break;
case PIXELFORMAT_UNCOMPRESSED_R8G8B8: bpp = 24; break;
case PIXELFORMAT_UNCOMPRESSED_R32: bpp = 32; break;
case PIXELFORMAT_UNCOMPRESSED_R32G32B32: bpp = 32*3; break;
case PIXELFORMAT_UNCOMPRESSED_R32G32B32A32: bpp = 32*4; break;
case PIXELFORMAT_COMPRESSED_DXT1_RGB:
case PIXELFORMAT_COMPRESSED_DXT1_RGBA:
case PIXELFORMAT_COMPRESSED_ETC1_RGB:
case PIXELFORMAT_COMPRESSED_ETC2_RGB:
case PIXELFORMAT_COMPRESSED_PVRT_RGB:
case PIXELFORMAT_COMPRESSED_PVRT_RGBA: bpp = 4; break;
case PIXELFORMAT_COMPRESSED_DXT3_RGBA:
case PIXELFORMAT_COMPRESSED_DXT5_RGBA:
case PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA:
case PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA: bpp = 8; break;
case PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA: bpp = 2; break;
default: break;
}
dataSize = width*height*bpp/8; // Total data size in bytes
// Most compressed formats works on 4x4 blocks,
// if texture is smaller, minimum dataSize is 8 or 16
if ((width < 4) && (height < 4))
{
if ((format >= PIXELFORMAT_COMPRESSED_DXT1_RGB) && (format < PIXELFORMAT_COMPRESSED_DXT3_RGBA)) dataSize = 8;
else if ((format >= PIXELFORMAT_COMPRESSED_DXT3_RGBA) && (format < PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA)) dataSize = 16;
}
return dataSize;
}
#endif // RLGL_IMPLEMENTATION
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