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Bug 1957 - SDL_UpdateTexture or SDL_RenderCopy is malfunctioning
Summary: SDL_UpdateTexture or SDL_RenderCopy is malfunctioning
Status: RESOLVED INVALID
Alias: None
Product: SDL
Classification: Unclassified
Component: render (show other bugs)
Version: 2.0.0
Hardware: x86 Windows 7
: P2 normal
Assignee: Sam Lantinga
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-07-11 10:34 UTC by Tom
Modified: 2013-07-12 05:39 UTC (History)
0 users

See Also:

Attachments
Test case (1.45 KB, text/plain)
2013-07-11 10:34 UTC, Tom 		Details
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Description Tom 2013-07-11 10:34:26 UTC 
Created attachment 1219 [details]
Test case

I built SDL2 from the release candidate source on the website with the latest version of mingw.

SDL_RenderCopy seems to draw only the first line of the texture and stretch it over the rest of the window/render-surface.

I have also tried with an explicit SDL_Rect rather than NULL (passed to UpdateTexture and RenderCopy) but get the same result.
Comment 1 Sam Lantinga 2013-07-12 00:59:26 UTC 
I'm pretty sure you meant to use a non-zero pitch for SDL_UpdateTexture().

What happens if you change that line to this?
SDL_UpdateTexture(tex, NULL, (void*) buf, 640*4);
Comment 2 Tom 2013-07-12 05:16:47 UTC 
Yup that works. Sorry! I though pitch was a border between rows or something. Should have read the docs a little more carefully.
Comment 3 Sam Lantinga 2013-07-12 05:39:34 UTC 
Great, I'm glad you figured it out. :)