Disable filtering on 1x1 textures.
Textures with just one texel don't require filtering. This also avoids precision
issues for pedantic tests which expect exact values.
Bug swiftshader:39
Change-Id: I52c5697e277523e2b8cb2c879ba0a7b2296ee7c5
Reviewed-on: https://swiftshader-review.googlesource.com/9068
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>
diff --git a/src/Renderer/Sampler.cpp b/src/Renderer/Sampler.cpp
index cd4c614..e2447e0 100644
--- a/src/Renderer/Sampler.cpp
+++ b/src/Renderer/Sampler.cpp
@@ -406,6 +406,15 @@
FilterType Sampler::getTextureFilter() const
{
+ // Don't filter 1x1 textures.
+ if(texture.mipmap[0].width[0] == 1 && texture.mipmap[0].height[0] == 1 && texture.mipmap[0].depth[0] == 1)
+ {
+ if(mipmapFilter() == MIPMAP_NONE)
+ {
+ return FILTER_POINT;
+ }
+ }
+
FilterType filter = textureFilter;
if(gather && Surface::componentCount(internalTextureFormat) == 1)
