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Fixed bug 2924 - SDL_CreateRGBSurface[From] versions that take SDL_PIXELFORMAT enum

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Daniel Gibson

Currently, SDL_CreateRGBSurface() and SDL_CreateRGBSurfaceFrom() take Uint32 masks for RGBA to "describe" the Pixelformat of the surface.
Internally those value are only used to map to one of the SDL_PIXELFORMAT_* enum values that are used for further processing.

I think it would be both handy and more efficient to be able to specify SDL_PIXELFORMAT_* yourself without using SDL_PixelFormatEnumToMasks() to create masks first, so I implemented functions that do that:
SDL_CreateRGBSurfaceWithFormat() and SDL_CreateRGBSurfaceWithFormatFrom() which are like the versions without "WithFormat" but instead of taking 4 Uint32s for R/G/B/A masks, they take one for a SDL_PIXELFORMAT_* enum value.

Together with https://bugzilla.libsdl.org/show_bug.cgi?id=2923 creating a SDL_Surface* from RGBA data (e.g. from stb_image)  is as easy as
  surf = SDL_SDL_CreateRGBSurfaceWithFormat(0, w, h, bppToUse*8, SDL_PIXELFORMAT_RGBA32);
This commit is contained in:
Sam Lantinga 2016-10-07 17:04:58 -07:00
parent 73f2c5413d
commit d2676c2985
4 changed files with 60 additions and 15 deletions
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4
src/dynapi/SDL_dynapi_overrides.h
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@ -445,6 +445,8 @@
#define SDL_iconv_close SDL_iconv_close_REAL
#define SDL_iconv SDL_iconv_REAL
#define SDL_iconv_string SDL_iconv_string_REAL
#define SDL_CreateRGBSurfaceWithFormat SDL_CreateRGBSurfaceWithFormat_REAL
#define SDL_CreateRGBSurfaceWithFormatFrom SDL_CreateRGBSurfaceWithFormatFrom_REAL
#define SDL_CreateRGBSurface SDL_CreateRGBSurface_REAL
#define SDL_CreateRGBSurfaceFrom SDL_CreateRGBSurfaceFrom_REAL
#define SDL_FreeSurface SDL_FreeSurface_REAL
@ -607,3 +609,5 @@
#define SDL_RenderGetIntegerScale SDL_RenderGetIntegerScale_REAL
#define SDL_DequeueAudio SDL_DequeueAudio_REAL
#define SDL_SetWindowResizable SDL_SetWindowResizable_REAL
#define SDL_CreateRGBSurfaceWithFormat SDL_CreateRGBSurfaceWithFormat_REAL
#define SDL_CreateRGBSurfaceWithFormatFrom SDL_CreateRGBSurfaceWithFormatFrom_REAL