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Change Pixelformat to 332 (one byte) instead of 8888 (four bytes).

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Peter 2021-11-08 20:03:28 +01:00 committed by Nick Briggs
parent 64e0419af3
commit 0ed7719343
1 changed files with 7 additions and 18 deletions
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25
src/sdl.c
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@ -13,7 +13,7 @@
static SDL_Window *sdl_window = NULL;
static SDL_Renderer *sdl_renderer = NULL;
static SDL_Texture *sdl_texture = NULL;
static Uint32 *buffer = NULL;
static char *buffer = NULL;
extern void kb_trans(u_short keycode, u_short upflg);
extern int error(const char *s);
@ -197,17 +197,6 @@ void DoRing() {
if (*KEYBUFFERING68k == NIL) *KEYBUFFERING68k = ATOM_T;
}
void set_pixel(SDL_Surface *surface, int x, int y, Uint32 pixel)
{
if(x >= surface->w)
return;
if(y >= surface->h)
return;
Uint32 * const target_pixel = (Uint32 *) ((Uint8 *) surface->pixels
+ y * surface->pitch
+ x * surface->format->BytesPerPixel);
*target_pixel = pixel;
}
int should_update_texture = 0;
void sdl_notify_damage(int x, int y, int w, int h) {
@ -246,7 +235,7 @@ void sdl_bitblt_to_screen(int _x, int _y, int _w, int _h) {
int before = SDL_GetTicks();
int width = sdl_displaywidth;
int height = sdl_displayheight;
int bpw = 32;
int bpw = 8 * sizeof(Uint32);
int pitch = sdl_displaywidth / bpw;
int xlimit = (_x + _w + bpw - 1) / bpw;
int ylimit = _y + _h;
@ -258,9 +247,9 @@ void sdl_bitblt_to_screen(int _x, int _y, int _w, int _h) {
//printf("%d/%d %d\n", x, y, b);
int px = 0;
if(w & (1 << (bpw - 1 - b))) {
px = do_invert ? 0xffffffff : 0xff000000;
px = do_invert ? 0xff : 0x00;
} else {
px = do_invert ? 0xff000000 : 0xffffffff;
px = do_invert ? 0x00 : 0xff;
}
//printf("px is %x\n", px);
int xx = thex + b;
@ -462,7 +451,7 @@ void process_SDLevents() {
if(should_update_texture) {
before = SDL_GetTicks();
sdl_bitblt_to_screen(0, 0, sdl_displaywidth, sdl_displayheight);
SDL_UpdateTexture(sdl_texture, NULL, buffer, sdl_displaywidth * sizeof(Uint32));
SDL_UpdateTexture(sdl_texture, NULL, buffer, sdl_displaywidth * sizeof(char));
after = SDL_GetTicks();
// printf("UpdateTexture took %dms\n", after - before);
should_update_texture = 0;
@ -526,8 +515,8 @@ int init_SDL(char *windowtitle, int w, int h, int s) {
SDL_SetRenderDrawColor(sdl_renderer, 50, 50, 50, 255);
SDL_RenderSetScale(sdl_renderer, 1.0, 1.0);
printf("Creating texture...\n");
sdl_texture = SDL_CreateTexture(sdl_renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, width, height);
buffer = malloc(width * height * sizeof(Uint32));
sdl_texture = SDL_CreateTexture(sdl_renderer, SDL_PIXELFORMAT_RGB332, SDL_TEXTUREACCESS_STREAMING, width, height);
buffer = malloc(width * height * sizeof(char));
printf("SDL initialised\n");
return 0;
}