Add vulkan files into skia repo. This is an incomplete backend with only partial functionality at this time.

R=robertphillips@google.com
TBR=bsalomon@google.com

BUG=skia:4955
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1718693002

Committed: https://skia.googlesource.com/skia/+/48cf268defad66f58f1aa03b4835e5583be96b2f

Review URL: https://codereview.chromium.org/1718693002

1 files changed, 85 insertions, 0 deletions

diff --git a/src/gpu/vk/GrVkUniformHandler.h b/src/gpu/vk/GrVkUniformHandler.h
new file mode 100644
index 0000000000..f84bcff0a2
--- /dev/null
+++ b/src/gpu/vk/GrVkUniformHandler.h
@@ -0,0 +1,85 @@
+/*
+* Copyright 2016 Google Inc.
+*
+* Use of this source code is governed by a BSD-style license that can be
+* found in the LICENSE file.
+*/
+
+#ifndef GrVkUniformHandler_DEFINED
+#define GrVkUniformHandler_DEFINED
+
+#include "glsl/GrGLSLUniformHandler.h"
+
+#include "GrAllocator.h"
+#include "glsl/GrGLSLShaderVar.h"
+
+static const int kUniformsPerBlock = 8;
+
+class GrVkUniformHandler : public GrGLSLUniformHandler {
+public:
+    enum {
+        kSamplerDescSet = 0,
+        kUniformBufferDescSet = 1,
+    };
+    enum {
+        kVertexBinding = 0,
+        kFragBinding = 1,
+    };
+
+    // fUBOffset is only valid if the GrSLType of the fVariable is not a sampler
+    struct UniformInfo {
+        GrGLSLShaderVar fVariable;
+        uint32_t        fVisibility;
+        uint32_t        fSetNumber;
+        uint32_t        fBinding;
+        uint32_t        fUBOffset;
+    };
+    typedef GrTAllocator<UniformInfo> UniformInfoArray;
+
+    const GrGLSLShaderVar& getUniformVariable(UniformHandle u) const override {
+        return fUniforms[u.toIndex()].fVariable;
+    }
+
+    const char* getUniformCStr(UniformHandle u) const override {
+        return this->getUniformVariable(u).c_str();
+    }
+
+private:
+    explicit GrVkUniformHandler(GrGLSLProgramBuilder* program)
+        : INHERITED(program)
+        , fUniforms(kUniformsPerBlock)
+        , fCurrentVertexUBOOffset(0)
+        , fCurrentFragmentUBOOffset(0)
+        , fCurrentSamplerBinding(0) {
+    }
+
+    UniformHandle internalAddUniformArray(uint32_t visibility,
+                                          GrSLType type,
+                                          GrSLPrecision precision,
+                                          const char* name,
+                                          bool mangleName,
+                                          int arrayCount,
+                                          const char** outName) override;
+
+    void appendUniformDecls(GrShaderFlags, SkString*) const override;
+
+    bool hasVertexUniforms() const { return fCurrentVertexUBOOffset > 0; }
+    bool hasFragmentUniforms() const { return fCurrentFragmentUBOOffset > 0; }
+
+
+    const UniformInfo& getUniformInfo(UniformHandle u) const {
+        return fUniforms[u.toIndex()];
+    }
+
+
+    UniformInfoArray fUniforms;
+    uint32_t         fCurrentVertexUBOOffset;
+    uint32_t         fCurrentFragmentUBOOffset;
+    uint32_t         fCurrentSamplerBinding;
+
+    friend class GrVkProgramBuilder;
+
+    typedef GrGLSLUniformHandler INHERITED;
+};
+
+#endif
\ No newline at end of file