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VIDEO: Allow setting alpha blending mode.

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This commit is contained in:
Lars Brinkhoff
2020-11-23 09:32:45 +01:00
parent 10f3a9dea3
commit ed4b204584
2 changed files with 60 additions and 7 deletions
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60
sim_video.c
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@@ -370,6 +370,7 @@ t_bool vid_cursor_visible; /* cursor visibility sta
DEVICE *vid_dev;
t_bool vid_key_state[SDL_NUM_SCANCODES];
VID_DISPLAY *next;
t_bool vid_blending;
};
SDL_Thread *vid_thread_handle = NULL; /* event thread handle */
@@ -625,6 +626,7 @@ vptr->vid_width = width;
vptr->vid_height = height;
vptr->vid_mouse_captured = FALSE;
vptr->vid_cursor_visible = (vptr->vid_flags & SIM_VID_INPUTCAPTURED);
vptr->vid_blending = FALSE;
if (!vid_active) {
vid_key_events.head = 0;
@@ -786,6 +788,11 @@ uint32 vid_map_rgb (uint8 r, uint8 g, uint8 b)
return vid_map_rgb_window (&vid_first, r, g, b);
}
uint32 vid_map_rgba_window (VID_DISPLAY *vptr, uint8 r, uint8 g, uint8 b, uint8 a)
{
return SDL_MapRGBA (vptr->vid_format, r, g, b, a);
}
static SDL_Rect *vid_dst_last;
static uint32 *vid_data_last;
@@ -1574,11 +1581,15 @@ vid_stretch(vptr, &vid_dst);
sim_debug (SIM_VID_DBG_VIDEO, vptr->vid_dev, "Video Update Event: \n");
if (sim_deb)
fflush (sim_deb);
if (SDL_RenderClear (vptr->vid_renderer))
sim_printf ("%s: Video Update Event: SDL_RenderClear error: %s\n", vid_dname(vptr->vid_dev), SDL_GetError());
if (SDL_RenderCopy (vptr->vid_renderer, vptr->vid_texture, NULL, &vid_dst))
sim_printf ("%s: Video Update Event: SDL_RenderCopy error: %s\n", vid_dname(vptr->vid_dev), SDL_GetError());
SDL_RenderPresent (vptr->vid_renderer);
if (vptr->vid_blending)
SDL_RenderPresent (vptr->vid_renderer);
else {
if (SDL_RenderClear (vptr->vid_renderer))
sim_printf ("%s: Video Update Event: SDL_RenderClear error: %s\n", vid_dname(vptr->vid_dev), SDL_GetError());
if (SDL_RenderCopy (vptr->vid_renderer, vptr->vid_texture, NULL, &vid_dst))
sim_printf ("%s: Video Update Event: SDL_RenderCopy error: %s\n", vid_dname(vptr->vid_dev), SDL_GetError());
SDL_RenderPresent (vptr->vid_renderer);
}
}
void vid_update_cursor (VID_DISPLAY *vptr, SDL_Cursor *cursor, t_bool visible)
@@ -1620,8 +1631,13 @@ if (vid_dst == vid_dst_last) {
}
SDL_UnlockMutex (vptr->vid_draw_mutex);
if (SDL_UpdateTexture(vptr->vid_texture, vid_dst, buf, vid_dst->w*sizeof(*buf)))
sim_printf ("%s: vid_draw_region() - SDL_UpdateTexture error: %s\n", vid_dname(vptr->vid_dev), SDL_GetError());
if (vptr->vid_blending) {
SDL_UpdateTexture(vptr->vid_texture, vid_dst, buf, vid_dst->w*sizeof(*buf));
SDL_RenderCopy (vptr->vid_renderer, vptr->vid_texture, vid_dst, vid_dst);
}
else
if (SDL_UpdateTexture(vptr->vid_texture, vid_dst, buf, vid_dst->w*sizeof(*buf)))
sim_printf ("%s: vid_draw_region() - SDL_UpdateTexture error: %s\n", vid_dname(vptr->vid_dev), SDL_GetError());
free (vid_dst);
free (buf);
@@ -1688,6 +1704,36 @@ vid_active++;
return 1;
}
t_stat vid_set_alpha_mode (VID_DISPLAY *vptr, int mode)
{
SDL_BlendMode x;
switch (mode) {
case SIM_ALPHA_NONE:
vptr->vid_blending = FALSE;
x = SDL_BLENDMODE_NONE;
break;
case SIM_ALPHA_BLEND:
vptr->vid_blending = TRUE;
x = SDL_BLENDMODE_BLEND;
break;
case SIM_ALPHA_ADD:
vptr->vid_blending = TRUE;
x = SDL_BLENDMODE_ADD;
break;
case SIM_ALPHA_MOD:
vptr->vid_blending = TRUE;
x = SDL_BLENDMODE_MOD;
break;
default:
return SCPE_ARG;
}
if (SDL_SetTextureBlendMode (vptr->vid_texture, x))
return SCPE_IERR;
if (SDL_SetRenderDrawBlendMode (vptr->vid_renderer, x))
return SCPE_IERR;
return SCPE_OK;
}
static void vid_destroy (VID_DISPLAY *vptr)
{
VID_DISPLAY *parent;