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bb0d6221c1
These are much smaller than the previous BMP files Fixes https://github.com/libsdl-org/SDL/issues/14159
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/*
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This is for generating thumbnails and videos of examples. Just include it
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temporarily and let it override SDL_RenderPresent, etc, and it'll dump each
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frame rendered to a new .png file.
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*/
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static bool SAVERENDERING_SDL_RenderPresent(SDL_Renderer *renderer)
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{
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static unsigned int framenum = 0;
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SDL_Surface *surface = SDL_RenderReadPixels(renderer, NULL);
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if (!surface) {
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SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Failed to read pixels for frame #%u! (%s)", framenum, SDL_GetError());
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} else {
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char fname[64];
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SDL_snprintf(fname, sizeof (fname), "frame%05u.png", framenum);
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if (!SDL_SavePNG(surface, fname)) {
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SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Failed to save png for frame #%u! (%s)", framenum, SDL_GetError());
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}
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SDL_DestroySurface(surface);
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}
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framenum++;
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return SDL_RenderPresent(renderer);
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}
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#define SDL_RenderPresent SAVERENDERING_SDL_RenderPresent
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