Add integer texture support.

This allows us to create integer textures and sample them from a GrProcessor's code.

Filtering is limited to NEAREST.

Adds tests for reading/writing pixels, copying, and drawing. These operations are not allowed to convert to fixed/float configs.

Vulkan support is TBD.


GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4348

Change-Id: If38d89a03285d4bd98d1f14f9638b0320977e43d
Reviewed-on: https://skia-review.googlesource.com/4348
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Chris Dalton <csmartdalton@google.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/sksl/SkSLContext.h b/src/sksl/SkSLContext.h
index dc41c6d7fc..80ad7fb8f4 100644
--- a/src/sksl/SkSLContext.h
+++ b/src/sksl/SkSLContext.h
@@ -78,6 +78,8 @@ public:
     , fSampler1DArrayShadow_Type(new Type("sampler1DArrayShadow"))
     , fSampler2DArrayShadow_Type(new Type("sampler2DArrayShadow"))
     , fSamplerCubeArrayShadow_Type(new Type("samplerCubeArrayShadow"))
+    // Related to below FIXME, gsampler*s don't currently expand to cover integer case.
+    , fISampler2D_Type(new Type("isampler2D", SpvDim2D, false, false, false, true))
     // FIXME figure out what we're supposed to do with the gsampler et al. types)
     , fGSampler1D_Type(new Type("$gsampler1D", static_type(*fSampler1D_Type)))
     , fGSampler2D_Type(new Type("$gsampler2D", static_type(*fSampler2D_Type)))
@@ -193,6 +195,8 @@ public:
     const std::unique_ptr<Type> fSampler2DArrayShadow_Type;
     const std::unique_ptr<Type> fSamplerCubeArrayShadow_Type;
 
+    const std::unique_ptr<Type> fISampler2D_Type;
+
     const std::unique_ptr<Type> fGSampler1D_Type;
     const std::unique_ptr<Type> fGSampler2D_Type;
     const std::unique_ptr<Type> fGSampler3D_Type;