Add vulkan files into skia repo.

src/gpu/vk/GrVkUtil.cpp

Index: src/gpu/vk/GrVkUtil.cpp
diff --git a/src/gpu/vk/GrVkUtil.cpp b/src/gpu/vk/GrVkUtil.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ec3ec234d40981056508c80052e283aa8ddeaeb6
--- /dev/null
+++ b/src/gpu/vk/GrVkUtil.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrVkUtil.h"
+
+bool GrPixelConfigToVkFormat(GrPixelConfig config, VkFormat* format) {
+    VkFormat dontCare;
+    if (!format) {
+        format = &dontCare;
+    }
+
+    switch (config) {
+        case kRGBA_8888_GrPixelConfig:
+            *format = VK_FORMAT_R8G8B8A8_UNORM;
+            break;
+        case kBGRA_8888_GrPixelConfig:
+            *format = VK_FORMAT_B8G8R8A8_UNORM;
+            break;
+        case kSRGBA_8888_GrPixelConfig:
+            *format = VK_FORMAT_R8G8B8A8_SRGB;
+            break;
+        case kRGB_565_GrPixelConfig:
+            *format = VK_FORMAT_R5G6B5_UNORM_PACK16;
+            break;
+        case kRGBA_4444_GrPixelConfig:
+            *format = VK_FORMAT_R4G4B4A4_UNORM_PACK16;
+            break;
+        case kIndex_8_GrPixelConfig:
+            // No current rad support for this config
+            return false;
+        case kAlpha_8_GrPixelConfig:
+            *format = VK_FORMAT_R8_UNORM;
+            break;
+        case kETC1_GrPixelConfig:
+            // converting to ETC2 which is a superset of ETC1
+            *format = VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK;
+            break;
+        case kLATC_GrPixelConfig:
+            // No current rad support for this config
+            return false;
+        case kR11_EAC_GrPixelConfig:
+            *format = VK_FORMAT_EAC_R11_UNORM_BLOCK;
+            break;
+        case kASTC_12x12_GrPixelConfig:
+            *format = VK_FORMAT_ASTC_12x12_UNORM_BLOCK;
+            break;
+        case kRGBA_float_GrPixelConfig:
+            *format = VK_FORMAT_R32G32B32A32_SFLOAT;
+            break;
+        case kRGBA_half_GrPixelConfig:
+            *format = VK_FORMAT_R16G16B16A16_SFLOAT;
+            break;
+        case kAlpha_half_GrPixelConfig:
+            *format = VK_FORMAT_R16_SFLOAT;
+            break;
+        default:
+            return false;
+    }
+    return true;
+}
+
+bool GrSampleCountToVkSampleCount(uint32_t samples, VkSampleCountFlagBits* vkSamples) {
+    switch (samples) {
+        case 0: // fall through
+        case 1:
+            *vkSamples = VK_SAMPLE_COUNT_1_BIT;
+            return true;
+        case 2:
+            *vkSamples = VK_SAMPLE_COUNT_2_BIT;
+            return true;
+        case 4:
+            *vkSamples = VK_SAMPLE_COUNT_2_BIT;
+            return true;
+        case 8:
+            *vkSamples = VK_SAMPLE_COUNT_2_BIT;
+            return true;
+        case 16:
+            *vkSamples = VK_SAMPLE_COUNT_2_BIT;
+            return true;
+        case 32:
+            *vkSamples = VK_SAMPLE_COUNT_2_BIT;
+            return true;
+        case 64:
+            *vkSamples = VK_SAMPLE_COUNT_2_BIT;
+            return true;
+        default:
+            return false;
+    }
+}
+