Forums - OpenGL GL_MAX_3D_TEXTURE_SIZE constant

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OpenGL GL_MAX_3D_TEXTURE_SIZE constant
reyn.vlietstra
Join Date: 10 Oct 17
Posts: 2
Posted: Tue, 2022-08-02 06:41
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Hi!

We have some c++ on android that creates a 3d texture via glTexImage3D.

According to the "Qualcomm Adreno OpenGL ES Developer Guide" I should be getting 16384 for the GL_MAX_3D_TEXTURE_SIZE constant for OpenGL 3.1 (page 97).

On my OnePlus 5, which is an Adreno 540 device, 2048 is returned by glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE, ... )

Predictably if I try anything higher than 2048 for glTexImage3D I get GL_INVALID_VALUE (Which is the max defined for OpenGL 3.0 on page 73).

Could I be initializing OpenGl wrong ? Linking wrong ? (GLESv3)

My EGL returns version 1.5 

glGetString(GL_VERSION): OpenGL ES 3.2 [email protected] (GIT@6209c5d, Ifdcc64d6e8, 1576143393) (Date:12/12/19)

glGetString(GL_RENDERER): Adreno (TM) 540

Do phone manufacturers override the limit ? Should I be getting 16384 ? Is anyone else getting that on an Adren 420+

I'm using visual studio, clang and egl.

Please help
Thanks!
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Re: OpenGL GL_MAX_3D_TEXTURE_SIZE constant
DuBo
Join Date: 9 Dec 13
Posts: 72
Posted: Tue, 2022-11-29 23:52
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Dear Customer

I just checked in Adreno GPU driver, 

The GL_MAX_3D_TEXTURE_SIZE is really defined as 2048 in driver code. The GL_MAX_TEXTURE_SIZE and GL_MAX_CUBE_MAP_TEXTURE_SIZE are 16384.

But this old document really says that  GL_MAX_3D_TEXTURE_SIZE 16384.

I will check with DEV team then update you again.
 

Thanks
Bob Du

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