1 Reply Latest reply on May 16, 2013 12:56 PM by yousry

    catalyst 13.1 out of line for glReadPixels


      Sorry, I can only test with  a catalyst driver on my notebook at the moment:


      I created a texture with:

          glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32UI, width, height, 0, GL_RGB_INTEGER, GL_UNSIGNED_INT, NULL);


      A shader writes in it with:


      out uvec3 FragColor;
      FragColor = uvec3(...);


      in this case it writes the values (100,0,0) into the color channels.


      Than I use a FBO and read the pixels with:


      GLuint Pixel[3];
      glReadPixels(x, y, 1, 1, GL_RGB_INTEGER, GL_UNSIGNED_INT, &Pixel);


      The output is unexpected and looks like this:

      printf("%u  %d\n", Pixel[0], Pixel[0]);


      4294967196  -100


      The same source works flawless with geforce and osx driver.