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feat: screenshot api #828

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feat: screenshot api #828

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1 change: 1 addition & 0 deletions workspace/all/common/api.h
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Original file line number Diff line number Diff line change
Expand Up @@ -716,6 +716,7 @@ void PLAT_vsync(int remaining);
scaler_t PLAT_getScaler(GFX_Renderer* renderer);
void PLAT_blitRenderer(GFX_Renderer* renderer);
void PLAT_flip(SDL_Surface* screen, int sync);
int PLAT_captureScreenshot(SDL_Surface* out);
void PLAT_GL_Swap();
void GFX_GL_Swap();
unsigned char* PLAT_GL_screenCapture(int* outWidth, int* outHeight);
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51 changes: 51 additions & 0 deletions workspace/all/common/generic_video.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1345,6 +1345,57 @@ void PLAT_GPU_Flip() {
SDL_RenderPresent(vid.renderer);
}

int PLAT_captureScreenshot(SDL_Surface* out) {
if (!out) return SDL_SetError("Output surface is NULL");
if (!vid.renderer || !vid.screen) return SDL_SetError("Video is not initialized");
if (out->w != vid.screen->w || out->h != vid.screen->h) {
return SDL_SetError("Output surface must be %dx%d", vid.screen->w, vid.screen->h);
}

SDL_Texture* previous_target = SDL_GetRenderTarget(vid.renderer);
Uint8 previous_r;
Uint8 previous_g;
Uint8 previous_b;
Uint8 previous_a;
if (SDL_GetRenderDrawColor(vid.renderer, &previous_r, &previous_g,
&previous_b, &previous_a) != 0) return -1;

Uint8 clear_r;
Uint8 clear_g;
Uint8 clear_b;
Uint8 clear_a;
SDL_GetRGBA(vid.clear_color, vid.screen->format, &clear_r, &clear_g, &clear_b, &clear_a);

SDL_Texture* capture_target = SDL_CreateTexture(vid.renderer,
SDL_PIXELFORMAT_ARGB8888,
SDL_TEXTUREACCESS_TARGET,
vid.screen->w,
vid.screen->h);
if (!capture_target) return -1;

int result = -1;
if (SDL_SetRenderTarget(vid.renderer, capture_target) != 0) goto restore;
if (SDL_SetRenderDrawColor(vid.renderer, clear_r, clear_g, clear_b, clear_a) != 0) goto restore;
if (SDL_RenderClear(vid.renderer) != 0) goto restore;
if (SDL_RenderCopy(vid.renderer, vid.target_layer1, NULL, NULL) != 0) goto restore;
if (SDL_RenderCopy(vid.renderer, vid.target_layer2, NULL, NULL) != 0) goto restore;
if (SDL_RenderCopy(vid.renderer, vid.stream_layer1, NULL, NULL) != 0) goto restore;
if (SDL_RenderCopy(vid.renderer, vid.target_layer3, NULL, NULL) != 0) goto restore;
if (SDL_RenderCopy(vid.renderer, vid.target_layer4, NULL, NULL) != 0) goto restore;
if (SDL_RenderCopy(vid.renderer, vid.target_layer5, NULL, NULL) != 0) goto restore;
if (SDL_MUSTLOCK(out) && SDL_LockSurface(out) != 0) goto restore;
result = SDL_RenderReadPixels(vid.renderer, NULL, out->format->format,
out->pixels, out->pitch);
if (SDL_MUSTLOCK(out)) SDL_UnlockSurface(out);

restore:
if (SDL_SetRenderTarget(vid.renderer, previous_target) != 0) result = -1;
if (SDL_SetRenderDrawColor(vid.renderer, previous_r, previous_g,
previous_b, previous_a) != 0) result = -1;
SDL_DestroyTexture(capture_target);
return result;
}

void PLAT_animateSurfaceOpacity(
SDL_Surface *inputSurface,
int x, int y, int w, int h,
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