A customer ran into an issue where the GLSL shaders of my application would fail to compile on Intel hardware. He provided me with the following information about his hardware:
Intel HD Graphics 4600
Driver Version: 10.18.14.4080
Operating System: Windows 8.1 Pro
Processor: Intel Code i5-4430
Device ID: 0412
The problematic shaders contain the following helper function:
vec4 _textureBias(sampler2D s, vec4 c) { return textureOffset(s, c.xy, ivec2(0), c.w); }
Which is using the second textureOffset intrinsic function overload, as described here:
https://www.opengl.org/sdk/docs/man/html/textureOffset.xhtml. Note the optional last "bias" parameter. This compiles fine on both NVIDIA and AMD hardware. The above Intel system however reports:
ERROR: 'textureOffset' : no matching overloaded function found (using implicit conversion)
I suspect the driver is missing the overloads with that optional "bias" parameter. Removing this function solves the error, which is working for now, because it's not currently in use, but I'd still prefer to support it.
Thank you in advance!
