texture memory corruption with OpenGL ES 1.1

damianstewart — Sun, 04 Dec 2011 18:28:52 GMT

Hi all,

I'm seeing some bizarre texture corruption issues with OpenGL ES 1.1 on my i.mx53 qsb, running at 1920x1080 (u-boot: setenv hdmi video=mxcdi0fb:RGB24,1920x1080M@60) under X11, using the stock 11.01 Linux installation.

I'm using two FBOs (render-to-texture with glBindFramebufferOES etc.) to allow single buffered drawing with no glClear() between frames -- basically I want successive frames to accumulate. I'm drawing the FBOs to the screen as a pair of textured quads.

Over time the textures become corrupt: it looks like an occasional issue with the alignment or stride during a texture copy operation, where for example a ~256x256 tile of vertical line textured pixels will be duplicated sporadically elsewhere on the screen, but now with a 30 degree or 45 degree slant. Perhaps they are being corrupted when they are swapped from GPU to CPU memory?

Has anyone else experienced this? I'm not setting a GPU memory size (cf 1080p video on 1080p panel), could this be causing this problem?

Any advice or comments much appreciated!

Thanks,

Damian

Re: texture memory corruption with OpenGL ES 1.1

GuillermoHernan — Fri, 09 Dec 2011 20:58:46 GMT

could you share the source code so we can test?

topic texture memory corruption with OpenGL ES 1.1 in i.MX Processors

texture memory corruption with OpenGL ES 1.1

Re: texture memory corruption with OpenGL ES 1.1