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Enhancements for SDL_PremultiplyAlpha()

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The function can now convert between pixels of different formats, and takes a parameter to control whether the premultiplication is done in sRGB or linear space.

Also added SDL_PremultiplySurfaceAlpha(), which can premultiply the pixels of a surface in-place.
This commit is contained in:
Sam Lantinga 2024-07-17 12:50:56 -07:00
parent b99ea1ff75
commit 334962b056
7 changed files with 210 additions and 31 deletions
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1
src/dynapi/SDL_dynapi_overrides.h
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@ -635,6 +635,7 @@
#define SDL_PollEvent SDL_PollEvent_REAL
#define SDL_PostSemaphore SDL_PostSemaphore_REAL
#define SDL_PremultiplyAlpha SDL_PremultiplyAlpha_REAL
#define SDL_PremultiplySurfaceAlpha SDL_PremultiplySurfaceAlpha_REAL
#define SDL_PumpEvents SDL_PumpEvents_REAL
#define SDL_PushEvent SDL_PushEvent_REAL
#define SDL_PutAudioStreamData SDL_PutAudioStreamData_REAL