Setup support for UNIFORM_TEXEL_BUFFER descriptor sets in Vulkan

This is the first CL to get support for using texel buffers in vulkan.

Bug: skia:
Change-Id: Iaac5ba4a356b487bc2b63111cca34ed968881f6b
Reviewed-on: https://skia-review.googlesource.com/15100
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/gpu/vk/GrVkUniformHandler.h b/src/gpu/vk/GrVkUniformHandler.h
index 808eed7fb3..8cfd1a9da1 100644
--- a/src/gpu/vk/GrVkUniformHandler.h
+++ b/src/gpu/vk/GrVkUniformHandler.h
@@ -19,6 +19,7 @@ public:
     enum {
         kUniformBufferDescSet = 0,
         kSamplerDescSet = 1,
+        kTexelBufferDescSet = 2,
     };
     enum {
         kVertexBinding = 0,
@@ -46,6 +47,7 @@ private:
         : INHERITED(program)
         , fUniforms(kUniformsPerBlock)
         , fSamplers(kUniformsPerBlock)
+        , fTexelBuffers(kUniformsPerBlock)
         , fCurrentVertexUBOOffset(0)
         , fCurrentFragmentUBOOffset(0)
         , fCurrentSamplerBinding(0) {
@@ -76,6 +78,11 @@ private:
         return fSamplers[handle.toIndex()].fVisibility;
     }
 
+    int numTexelBuffers() const { return fTexelBuffers.count(); }
+    uint32_t texelBufferVisibility(SamplerHandle handle) const {
+        return fTexelBuffers[handle.toIndex()].fVisibility;
+    }
+
     ImageStorageHandle addImageStorage(uint32_t visibility, GrSLType,  GrImageStorageFormat,
                                        GrSLMemoryModel, GrSLRestrict, GrIOType,
                                        const char* name) override {
@@ -103,6 +110,7 @@ private:
     UniformInfoArray    fUniforms;
     UniformInfoArray    fSamplers;
     SkTArray<GrSwizzle> fSamplerSwizzles;
+    UniformInfoArray    fTexelBuffers;
 
     uint32_t            fCurrentVertexUBOOffset;
     uint32_t            fCurrentFragmentUBOOffset;