Add vulkan files into skia repo.

src/gpu/vk/GrVkCaps.h

Index: src/gpu/vk/GrVkCaps.h
diff --git a/src/gpu/vk/GrVkCaps.h b/src/gpu/vk/GrVkCaps.h
new file mode 100644
index 0000000000000000000000000000000000000000..3135c9e46ea9097dcb123af0cdbda5bb77b81d50
--- /dev/null
+++ b/src/gpu/vk/GrVkCaps.h
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrVkCaps_DEFINED
+#define GrVkCaps_DEFINED
+
+#include "GrCaps.h"
+#include "GrVkStencilAttachment.h"
+#include "vulkan/vulkan.h"
+
+struct GrVkInterface;
+class GrGLSLCaps;
+
+/**
+ * Stores some capabilities of a Vk backend.
+ */
+class GrVkCaps : public GrCaps {
+public:    
+    typedef GrVkStencilAttachment::Format StencilFormat;
+
+    /**
+     * Creates a GrVkCaps that is set such that nothing is supported. The init function should
+     * be called to fill out the caps.
+     */
+    GrVkCaps(const GrContextOptions& contextOptions, const GrVkInterface* vkInterface,
+             VkPhysicalDevice device);
+
+    bool isConfigTexturable(GrPixelConfig config) const override {
+        SkASSERT(kGrPixelConfigCnt > config);
+        return fConfigTextureSupport[config];
+    }
+
+    bool isConfigRenderable(GrPixelConfig config, bool withMSAA) const override {
+        SkASSERT(kGrPixelConfigCnt > config);
+        return fConfigRenderSupport[config][withMSAA];
+    }
+
+    bool isConfigRenderableLinearly(GrPixelConfig config, bool withMSAA) const {
+        SkASSERT(kGrPixelConfigCnt > config);
+        return fConfigLinearRenderSupport[config][withMSAA];
+    }
+
+    bool isConfigTexurableLinearly(GrPixelConfig config) const {
+        SkASSERT(kGrPixelConfigCnt > config);
+        return fConfigLinearTextureSupport[config];
+    }
+
+    /**
+     * Gets an array of legal stencil formats. These formats are not guaranteed to be supported by
+     * the driver but are legal VK_TEXTURE_FORMATs.
+     */
+    const SkTArray<StencilFormat, true>& stencilFormats() const {
+        return fStencilFormats;
+    }
+
+    /**
+     * Gets an array of legal stencil formats. These formats are not guaranteed to be supported by
+     * the driver but are legal VK_TEXTURE_FORMATs.
+     */
+    const SkTArray<StencilFormat, true>& linearStencilFormats() const {
+        return fLinearStencilFormats;
+    }
+
+    /**
+     * Returns the max number of sampled textures we can use in a program. This number is the max of
+     * max samplers and max sampled images. This number is technically the max sampled textures we
+     * can have per stage, but we'll use it for the whole program since for now we only do texture
+     * lookups in the fragment shader.
+     */
+    int maxSampledTextures() const {
+        return fMaxSampledTextures;
+    }
+
+
+    GrGLSLCaps* glslCaps() const { return reinterpret_cast<GrGLSLCaps*>(fShaderCaps.get()); }
+
+private:
+    void init(const GrContextOptions& contextOptions, const GrVkInterface* vkInterface,
+              VkPhysicalDevice device);
+    void initSampleCount(const VkPhysicalDeviceProperties& properties);
+    void initGLSLCaps(const GrVkInterface* interface, VkPhysicalDevice physDev);
+    void initConfigRenderableTable(const GrVkInterface* interface, VkPhysicalDevice physDev);
+    void initConfigTexturableTable(const GrVkInterface* interface, VkPhysicalDevice physDev);
+    void initStencilFormats(const GrVkInterface* interface, VkPhysicalDevice physDev);
+
+
+    bool fConfigTextureSupport[kGrPixelConfigCnt];
+    // For Vulkan we track whether a config is supported linearly (without need for swizzling)
+    bool fConfigLinearTextureSupport[kGrPixelConfigCnt];
+
+    // The first entry for each config is without msaa and the second is with.
+    bool fConfigRenderSupport[kGrPixelConfigCnt][2];
+    // The first entry for each config is without msaa and the second is with.
+    bool fConfigLinearRenderSupport[kGrPixelConfigCnt][2];
+
+    SkTArray<StencilFormat, true> fLinearStencilFormats;
+    SkTArray<StencilFormat, true> fStencilFormats;
+
+    int fMaxSampledTextures;
+
+    typedef GrCaps INHERITED;
+};
+
+#endif