[maemo-developers] Problem running ogles2 program on Nokia N900

[From: Kimmo Hämäläinen]

On Wed, 2010-02-24 at 22:37 +0100, ext Jonny Karlsson wrote:
> I have successfully compiled an OpenGL ES 2.0 program on scratchbox for 
> the FREMANTILE_ARMEL plattform. However, when running the program on Nokia 
> N900 the compilation of the vertex and fragment shaders fails. This is the 
> error code:
> 
> ------------------------------------------------
> Failed to compile fragment shader: Compile failed.
> ERROR: 0:1: 'varying' : syntax error; parse error
> ERROR: 1 compilation errors. No code generated.

"mediump varying" -> "varying mediump"

> 
> Failed to compile fragment shader: Compile failed.
> ERROR: 0:1: 'attribute' : syntax error; parse error
> ERROR: 1 compilation errors. No code generated.

Try removing highp/lowp/mediump from attributes, since those are given
as input, so maybe you cannot define their precision.

-Kimmo

> 
> 
> Failed to link program: Link Error: Vertex shader is missing.
> Link Error: Fragment shader is missing.
> --------------------------------------------------
> 
> This is my vertex shader:
> 
>  	const char* pszVertShader = "\
> 
>  		highp attribute vec4 myVertex;\
>  		lowp attribute vec4 fargKod;\
>  		mediump attribute vec2 myUV;\
>  		highp uniform mat4 yRotMatris;\
>  		highp uniform mat4 xRotMatris;\
>  		highp uniform mat4 frustMatris;\
>  		lowp varying vec4 outColor;\
>  		mediump varying vec2 myTextCoord;\
>  		void main(void)\
>  		{\
>  			outColor = fargKod;\
>  			myTextCoord = myUV;\
>  			gl_Position = myVertex * yRotMatris * xRotMatris;\
> 
>  		}";
> 
> and this is my fragment shader:
> 
>  	const char* pszFragShader = "\
>  		uniform sampler2D sampler2d;\
>  		mediump varying vec2 myTextCoord;\
>  		void main (void)\
>  		{\
>  			gl_FragColor = texture2D(sampler2d,myTextCoord);\
>  		}";
> 
> 
> These shader compile successfully and works fine when I run the same 
> OGLES2 program in the simulation environment.
> 
> Does anyone have a clue what could be wrong? Is there perhaps something 
> that need to be installed on the Nokia N900 to add shader compilation 
> support to it???
> 
> 
> /Jonny
> _______________________________________________
> maemo-developers mailing list
> maemo-developers at maemo.org
> https://lists.maemo.org/mailman/listinfo/maemo-developers