Hello,
Based on https://community.amd.com/t5/opengl-vulkan/doesn-t-work-glpixeltransferf-and-error-in-shader-on-open..., I believe you already have an internal ticket for this issue, but I would like to provide some additional background info and I cannot post in the OpenGL community.
I work on an OpenGL-based renderer for Unreal Engine 1 games, and one of our users is reporting a linking failure for the shaders that render level geometry. The error we retrieve using glGetProgramiv/glGetProgramInfoLog simply says: "Fail to build reflection info.".
The shaders in question pass quite a lot of data from the vertex to the fragment shaders, though, as far as we can tell, not enough to hit any of the implementation-defined limits.
After quite extensive debugging, however, we suspect that the 23.7.2 driver supports fewer varying vectors and/or output components than advertised/required by the GL spec.
I have uploaded two zip files with GLSL code. This set of shaders triggers the linking error. After disabling just one feature, the shaders look like this, and the problem disappears. There are other optional features that, when disabled, remove just one or two output variables (usually vec2 typed) from the vertex shader, which then also fixes the problem.
The user has a Radeon RX 570 card and runs on the latest 64-bit Windows 10 with the 23.7.2.230718 drivers. The game we tested was the 64-bit version of Unreal 1 (227k patch).
Thanks
