Imagination PowerVR SDK Blog

gles version


#1

Hi All,

I am new to GLES but I have some experience with desktop opengl. Currently I am trying to run some demos/examples on Android 2.2 supported with PVR SGX540 (samsung galaxy s). I am pretty sure this GPU has support for GLES 2.0 so why glGetString(GL_VERSION) returns 1.1 ?
There is also missing some important extensions like GL_ARB_vertex_program or something similar, why is that ?

Thanks in advance,
Marcin


#2

Have you downloaded our Android OpenGL ES 2.0 SDK and run some of the examples? The HelloTriangle training course shows how to set up ES 2.0 from scratch and draws a triangle using a vertex and fragment shader so you can see how this is set up too (all rendering in ES 2.0 is shader-based).

The Galaxy S I have here reports “OpenGL ES 2.0” when calling glGetString(GL_VERION) - are you definitely asking EGL for an ES 2.0 context?


#3

I run few samples from android NDK, there is hello-gl2 example which uses shaders, it works fine.

Now when I look into glGetString(GL_VERSION) output there is actually 2.0 version reported, previously I watched glInfo (from android market) and it still reports opengl version 1.1 which is misleading. I didn’t suspect such simple app like glInfo could be unreliable.

Thanks
Marcin


#4

It’s not unreliable, it’s just an OpenGL ES 1.1 application that gives you correct information for that API.





OpenGL ES 2.0 can’t be treated as simply a newer version of OpenGL ES 1.x. It’s a separate, non backwards compatible API.