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Bug 366 - Wrong clipping in SDL_DisplayYUVOverlay()
Summary: Wrong clipping in SDL_DisplayYUVOverlay()
Status: RESOLVED INVALID
Alias: None
Product: SDL
Classification: Unclassified
Component: video (show other bugs)
Version: 1.2.11
Hardware: x86 All
: P2 normal
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-11-17 07:25 UTC by aki.
Modified: 2006-11-17 21:44 UTC (History)
0 users

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Description aki. 2006-11-17 07:25:08 UTC 
Hello,

If SDL_SetVideoMode() is not called, SDL_DisplayYUVOverlay() doesn't draw anything. 

And even when SDL_SetVideoMode() is called, it is limited to the size that the size specified with SDL_SetVideoMode(). 

I think that it is clipping processing in SDL_DisplayYUVOverlay(). 
Could you fix?

Regards,
aki.
Comment 1 Ryan C. Gordon 2006-11-17 11:16:25 UTC 
Not a bug: YUV overlays are drawn into an SDL_Surface...you can't just draw on the desktop directly, so needing to call SDL_SetVideoMode() and then draw into the bounds of that surface is normal.

--ryan.
Comment 2 aki. 2006-11-17 21:44:15 UTC 
I want to use SDL_Overlay only for the color conversion.
For instance, in the following codes.


SDL_Surface* surface = SDL_CreateRGBSurface(
    SDL_SWSURFACE, 640, 480, 24, 0x000000ff, 0x0000ff00, 0x00ff0000, 0);
SDL_Overlay* overlay = SDL_CreateYUVOverlay(640, 480, SDL_YV12_OVERLAY, surface);
SDL_LockYUVOverlay(overlay);
//
// draw to overlay->pixels
//
SDL_DisplayYUVOverlay(overlay, &rect);
SDL_UnlockYUVOverlay(overlay);
//
// read from surface->pixels
//


aki.