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Bug 1408 - RGBA->RGBA blit error
Summary: RGBA->RGBA blit error
Status: RESOLVED INVALID
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: HG 2.0
Hardware: x86_64 Linux
: P2 blocker
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-02-01 08:48 UTC by Dimitris Zenios
Modified: 2012-02-06 07:10 UTC (History)
1 user (show)

See Also:

Attachments
Source code and image (11.42 KB, application/x-gzip)
2012-02-01 08:48 UTC, Dimitris Zenios 		Details
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Description Dimitris Zenios 2012-02-01 08:48:22 UTC 
Created attachment 811 [details]
Source code and image

It seems there is a bug when blitting RGBA->RGBA.The final surface is
always blank.

Attached is the test application and the image used
Comment 1 Gabriel Jacobo 2012-02-01 18:27:32 UTC 
I think you are missing the alpha information on the "final_surface" surface...or should I say, the alpha channel is set entirely to zero, so the image doesn't show up.


Try adding:
SDL_FillRect(final_surface, NULL, SDL_MapRGBA(final_surface->format, 0, 0,0,255));

after 

/*Blit the surface to another surface o check for RGBA->RGBA*/
final_surface = surface_new(temp->w,temp->h);

And you'll see the test works fine.
Comment 2 Gabriel Jacobo 2012-02-06 07:10:39 UTC 
Closing as discussed with Dimitris