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HD4000 OpenGL Shading Language Texture bug?

January 11, 2013, 4:04 am
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Dear Support Team,

 

Our OpenGL-based library fails to run correctly on Intel HD 4000. After a lot of debugging, I've managed to isolate a problem that concerns building a custom mip-map-pyramid using shaders.

 

I've created a small reproduction case for this problem (source code is available at https://github.com/hetcomp/hpmc/blob/iss9/tests/simplemipmapbuildup.cpp ):

 

First, I create a mipmap'ed texture 2D and create an FBO for each level.

 

Then, I populate the base level with a GPGPU pass, and then use the following shader to reduce the pyramid:

 

uniform sampler2D  tex;
uniform vec2       delta; // = vec2( -0.5/w, 0.5/w ), w is width of prev level
void
main(){    vec4 sums = vec4(        texture2D( tex, gl_TexCoord[0].xy+delta.xx )+        texture2D( tex, gl_TexCoord[0].xy+delta.yx )+        texture2D( tex, gl_TexCoord[0].xy+delta.xy )+        texture2D( tex, gl_TexCoord[0].xy+delta.yy ) );    gl_FragColor = sums;
}

 

using

 

for(GLsizei k=1; k<=size_l2; k++ ) {    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, k-1 );    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, k-1 );

 

to steer which texture level that should be sampled from.

 

The correct result is

 

Level 0
[0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
Level 1
[0,0,4,4] [1,0,4,4] [3,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] [1,0,4,4] [0,0,4,4] 
[1,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [1,0,4,4] 
[3,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] 
[4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] 
[4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] 
[3,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] 
[1,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [1,0,4,4] 
[0,0,4,4] [1,0,4,4] [3,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] [1,0,4,4] [0,0,4,4] 
Level 2
[6,0,16,16] [15,0,16,16] [15,0,16,16] [6,0,16,16] 
[15,0,16,16] [16,0,16,16] [16,0,16,16] [15,0,16,16] 
[15,0,16,16] [16,0,16,16] [16,0,16,16] [15,0,16,16] 
[6,0,16,16] [15,0,16,16] [15,0,16,16] [6,0,16,16] 
Level 3
[52,0,64,64] [52,0,64,64] 
[52,0,64,64] [52,0,64,64] 
Level 4
[208,0,256,256]

 

However, when running the code on an HD 4000, I get the following:

 

Level 0
[0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
[0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [1,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] [0,0,1,1] 
Level 1
[0,0,4,4] [1,0,4,4] [3,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] [1,0,4,4] [0,0,4,4] 
[1,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [1,0,4,4] 
[3,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] 
[4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] 
[4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] 
[3,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] 
[1,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [4,0,4,4] [1,0,4,4] 
[0,0,4,4] [1,0,4,4] [3,0,4,4] [4,0,4,4] [4,0,4,4] [3,0,4,4] [1,0,4,4] [0,0,4,4] 
Level 2
[6,0,16,16] [15,0,16,16] [15,0,16,16] [6,0,16,16] 
[15,0,16,16] [16,0,16,16] [16,0,16,16] [15,0,16,16] 
[15,0,16,16] [16,0,16,16] [16,0,16,16] [15,0,16,16] 
[6,0,16,16] [15,0,16,16] [15,0,16,16] [6,0,16,16] 
Level 3
[16,0,16,16] [13,0,16,16] 
[13,0,16,16] [10,0,16,16] 
Level 4
[16,0,16,16]

 

where level 3 and 4 is wrong.

 

I tried to repopulate the base level with a fixed value after the first reduction, to see if level 0 was sampled somehow after the first reduction, but this was not the case.

 

 

Version of driver etc, is:

hd4000-settings.png

 

Thanks,

cdyk

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