topic Hi, in Graphics

OpenGL 3D texture is not loaded correctly from pixel buffer

Marek_Fort — Thu, 20 Aug 2015 10:23:09 GMT

GPU SKU: Intel HD Graphics 4400, Intel HD Graphics 4600
Graphics Driver Version: 10.18.10.3995
Operating System: Windows 7 x64
API: OpenGL core profile.
Occurs on non-Intel GPUs?: No

Steps to Reproduce:
-------------------------------
1. Have PBO with 256kB of unique data
2. Call: glTexSubImage3D(GL_TEXTURE_3D, 0, 0,0,0, 64,64,64, GL_RED, GL_UNSIGNED_BYTE, NULL);
3. Call glGetTexImage to read it back
4. Compare with original PBO

Expected Results:

- Identical data

Actual Results:

- only first 4096 bytes are correct. Then exact copy of the first 4096 bytes are there instead.

Additional Information:

Data are loaded incorrectly,verified by both shader and glGetTexImage.

Loading data without PBO works well.

I am not sure why 4096. It could be either a page size or first slice (64*64*1 = 4096).

NVidia and AMD works well with identical code.

Hi Marek,

Michael_C_Intel2 — Thu, 20 Aug 2015 14:34:43 GMT

Hi Marek,

3995 is a rather old driver version. Have you tried the latest driver 4264?

https://downloadcenter.intel.com/product/81496/Intel-HD-Graphics-4600-for-4th-Generation-Intel-Core-Processors

-Michael

Hi,

Marek_Fort — Thu, 20 Aug 2015 15:19:38 GMT

Hi,

tested with 15.36.24.64.4264.

I get the same wrong results.

Marek

Hi Marek,

Michael_C_Intel2 — Thu, 20 Aug 2015 15:54:34 GMT

Hi Marek,

Thanks for the update. I have contacted the OpenGL driver development team and have an internal ticket for the issues. I will update you when we learn something.

-Michael

Hi,

Lars_B_ — Tue, 10 Nov 2015 14:25:18 GMT

Hi,

any news on this? Still occurring with 10.18.14.4294.

This is breaking our renderer...

Regards,

Lars

Hi Lars and Marek,

Michael_C_Intel2 — Tue, 10 Nov 2015 15:11:32 GMT

Hi Lars and Marek,

We confirmed it is a driver issue and the root cause. Our driver team is working on a fix, I do not have an ETA of when we will have a driver with the fix yet. Still need to know the complexity of the fix. I hope to know more soon.

-Michael

Hi,

Michael_C_Intel2 — Tue, 05 Jan 2016 15:04:38 GMT

Hi,

We have completed the fix and expect it to be included in the next driver release.

-Michael