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Bug 3026

Summary: SDL_ConvertSurfaceFormat does not seem to respect color keys
Product: SDL Reporter: Adam M. <adam>
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED INVALID QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: 2.0.3   
Hardware: x86_64   
OS: Windows 7   

Description Adam M. 2015-06-19 16:00:39 UTC 
This may or may not be a duplicate of #2979.

When converting an 8-bit surface with a color key to a 32-bit surface with an alpha channel, the color key doesn't seem to be translated into transparent pixels. For instance, I have an 8-bit image with a magenta color key. When converting to a 32-bit RGBA image, I get a bunch of opaque magenta pixels.
Comment 1 Adam M. 2015-06-19 20:28:50 UTC 
Other information:
* The conversion results in a 32-bit surface with no color key and blending enabled.
* With blending enabled, it looks alright.
* With blending disabled, I get the opaque magenta pixels.

I forgot that I had disabled blending as a workaround for bug #3023. So presumably it's creating magenta pixels with alpha = 0. This seems like correct enough behavior to me, so I'm closing this as INVALID.