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fix movie widget render on windows

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This commit is contained in:
Tim Felgentreff 2020-12-14 18:39:51 +01:00
parent 29cf6aa555
commit e38d5bf8c7
1 changed files with 22 additions and 6 deletions

28
src/video/movie.cpp
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@ -448,15 +448,31 @@ static void RenderToSurface(SDL_Surface *surface, SDL_Texture *yuv_overlay, SDL_
theora_decode_YUVout(&data->tstate, yuv);
SDL_UpdateYUVTexture(yuv_overlay, NULL, yuv->y, yuv->y_stride, yuv->u, yuv->uv_stride, yuv->v, yuv->uv_stride);
SDL_RenderClear(TheRenderer);
int w, h;
SDL_RenderGetLogicalSize(TheRenderer, &w, &h);
SDL_RenderSetLogicalSize(TheRenderer, 0, 0);
SDL_RenderCopy(TheRenderer, yuv_overlay, NULL, rect);
if (SDL_RenderReadPixels(TheRenderer, rect, surface->format->format, surface->pixels, surface->pitch)) {
// since SDL will render us at logical size, and SDL_RenderReadPixels will read the at
// output size, we need to adapt the rectangles to read and write from dynamically
int rw, rh, ww, wh;
SDL_GetWindowSize(TheWindow, &ww, &wh);
SDL_RenderGetLogicalSize(TheRenderer, &rw, &rh);
SDL_Rect render_rect;
render_rect.x = 0;
render_rect.y = 0;
double scaleX = (double)ww / rw;
double scaleY = (double)wh / rh;
double scale = std::min(scaleX, scaleY);
render_rect.w = rect->w / scale;
render_rect.h = rect->h / scale;
SDL_Rect read_rect;
read_rect.w = rect->w;
read_rect.h = rect->h;
read_rect.x = (ww - (rw * scale)) / 2;
read_rect.y = (wh - (rh * scale)) / 2;
SDL_RenderCopy(TheRenderer, yuv_overlay, NULL, &render_rect);
if (SDL_RenderReadPixels(TheRenderer, &read_rect, surface->format->format, surface->pixels, surface->pitch)) {
fprintf(stderr, "Reading from renderer not supported\n");
SDL_FillRect(surface, NULL, 0); // completely transparent
}
SDL_RenderSetLogicalSize(TheRenderer, w, h);
free(yuv);
}