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Bug 2977 - SDL_ISPIXELFORMAT_ALPHA returns 1 for SDL_PIXELFORMAT_BGR24
Summary: SDL_ISPIXELFORMAT_ALPHA returns 1 for SDL_PIXELFORMAT_BGR24
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: 2.0.2
Hardware: x86 Linux
: P2 normal
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-05-06 00:09 UTC by Lenard Lindstrom
Modified: 2015-05-31 05:45 UTC (History)
1 user (show)

See Also:

Attachments
Shows SDL_ISPIXELFORMAT_ALPHA value for two 24 bit pixel formats (1.51 KB, text/x-csrc)
2015-05-06 00:09 UTC, Lenard Lindstrom 		Details
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Description Lenard Lindstrom 2015-05-06 00:09:24 UTC 
Created attachment 2150 [details]
Shows SDL_ISPIXELFORMAT_ALPHA value for two 24 bit pixel formats

The SDL_PixelFormatEnum value SDL_PIXELFORMAT_BGR24 is expected to not have per-pixel alpha. Yet the SDL_ISPIXELFORMAT_ALPHA test is true, while it is false for SDL_PIXELFORMAT_RGB24. Attached is a program which shows the inconsistency, along with the situation where the anomaly was discovered.
Comment 1 Ryan C. Gordon 2015-05-31 05:45:54 UTC 
This is fixed now in https://hg.libsdl.org/SDL/rev/ad9917a91c06, thanks!

--ryan.