System Used: Lenovo V580c notebook
CPU SKU: i5-3230M
GPU SKU: HD4000
Graphics Driver Version:10.18.10.4276
Operating System:Windows 10 x64
API: OpenGL 3.3
Occurs on non-Intel GPUs?: No
Steps to Reproduce:
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1. Run "gs_bin_ubo/gs_binary.exe" from attached zip (or build it from source)
Expected Results:
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See "gs_bin_ubo/expected.png" from attached zip
Actual Results:
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See "gs_bin_ubo/bug.png" from attached zip
Additional Information:
Test app uses ARB_get_program_binary GL extension to cache compiled shader program. If this program contains geometry shader and uniform blocks something will go wrong.
Test app draw 2 quads: a left one with a shader program compiled from GLSL source, a right one with a shader program created from binary data obtained from first shader program. It works fine on AMD and NVIDIA: 2 identical quads are drawn. On Intel GPU only the left quad is drawn correctly.
If shader program doesn't contain geometry shader everything works fine. If instead of UBO regular uniform is used everything works fine. Looks like only a combination of ARB_get_program_binary, geometry shader and UBO produces this bug.
To build test app from source you will need GLFW library (used only for window and GL context creation).
