RenderReadPixels / UpdateTexture upside-down

[SDLBugzilla]

This bug report was migrated from our old Bugzilla tracker.

These attachments are available in the static archive:

• pixels upside-down (diff, text/plain, 2014-09-25 06:53:42 +0000, 1376 bytes)

Reported in version: 2.0.3
Reported for operating system, platform: Linux, x86_64

Comments on the original bug report:

On 2014-09-24 17:04:54 +0000, sanette wrote:

If I RenderReadPixels
and then immediately use the pixel data in UpdateTexture,
then the image is upside-down

On 2014-09-24 17:05:25 +0000, sanette wrote:

I'm using the opengl renderer

On 2014-09-25 06:53:42 +0000, sanette wrote:

Created attachment 1881
pixels upside-down

On 2014-09-25 06:54:24 +0000, sanette wrote:

of course, if I remove the specific code to put pixels top-down
in src/render/opengl/SDL_render_gl.c (see patch) then this works...
but this is very strange.

On 2014-09-26 14:16:46 +0000, sanette wrote:

the upside-down behaviour was noticed already in Bug 2705

On 2015-02-19 06:32:16 +0000, Ryan C. Gordon wrote:

Marking a large number of bugs with the "triage-2.0.4" keyword at once. Sorry
if you got a lot of email from this. This is to help me sort through some bugs
in regards to a 2.0.4 release. We may or may not fix this bug for 2.0.4,
though!

On 2017-08-14 05:01:27 +0000, Sam Lantinga wrote:

Ryan, can you make sure we're reading the pixels the right way for 2.0.6?

On 2017-10-21 12:58:40 +0000, Sylvain wrote:

I tried various configuration (with and without RenderTarget, renderer opengl) and I believe this is fixed.

Very likely with: https://hg.libsdl.org/SDL/rev/b8ca95a8eea9

On 2017-10-21 17:11:17 +0000, Sam Lantinga wrote:

Okay, can you please reopen this if you're still seeing the problem?

Thanks!