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Rich Geldreich
2026-02-10 13:07:33 -05:00
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shader_deblocking/README.md
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# Python+GLSL Shader Deblocking Sample
This sample demonstrates how to use a simpler pixel shader to greatly reduce
This sample demonstrates how to use a simple pixel shader to greatly reduce
ASTC block artifacts, which can be quite noticeable when the block size goes
beyond roughly 6x6. The shader determines if it's going to sample near an edge,
beyond roughly 6x6. The basic idea: instead of always sampling the texture using
1 tap, you sample the texture either 1 time or X times (with a simple low pass filter)
depending on whether or not the sample location is near a block edge.
The shader determines if it's going to sample near an edge,
and if so it samples a small vertical and horizontal region around the center sample
and applies a small low pass filter. The example shader is compatible with
mipmapping, bilinear filtering, trilinear filtering etc.