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jpark37
85cc7c84bc
Add a separate shader for area upscaling to take advantage of bilinear filtering. Iterating over texels is unnecessary in the upscale case because a target pixel can only overlap 1 or 2 texels in X and Y directions. When only overlapping one texel, adjust UVs to sample texel center to avoid filtering. Also add "base_dimension" uniform to avoid unnecessary division. Intel HD Graphics 530, 644x478 -> 1323x1080: ~836 us -> ~232 us
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