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3 commits

Author SHA1 Message Date
Geoffrey McRae
b4b4a37b2b [client] egl: switch to using GL_TEXTURE_EXTERNAL_OES for DMABUF 
According to Erik @ NVidia the open source NVidia driver will not
create a EGLImage from a DMABUF if the target is not
GL_TEXTURE_EXTERNAL_OES. This change set converts the dmabuf texture
from GL_TEXTURE_2D to GL_TEXTURE_EXTERNAL_OES and at runtime performs a
global search & replace on fragment shaders as needed to remain
compatible, replacing `sampler2D` with `samplerExternalOES`.

Ref: https://github.com/NVIDIA/open-gpu-kernel-modules/discussions/243#discussioncomment-3283415
 2023-03-09 09:20:01 +11:00
Geoffrey McRae
91b0cba145 [client] egl: switch from mediump to highp 
This fixes a rounding issue on certain hardware (NVidia) which actually
implement mediump as half precision (16-bit) float. It's safe to assume
`highp` is available as if the GPU does not support it, then the shader
compiler will try to find a lower precision that is supported by the GPU
 2023-03-05 14:10:21 +11:00
Geoffrey McRae
117e88c240 [client] egl: add new downscale filter 2021-08-12 15:54:16 +10:00