Add vulkan files into skia repo.

src/gpu/vk/GrVkStencilAttachment.cpp

Index: src/gpu/vk/GrVkStencilAttachment.cpp
diff --git a/src/gpu/vk/GrVkStencilAttachment.cpp b/src/gpu/vk/GrVkStencilAttachment.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..0b234f2a9b458fd705ffa84a7d8bed89ca55d827
--- /dev/null
+++ b/src/gpu/vk/GrVkStencilAttachment.cpp
@@ -0,0 +1,105 @@
+/*
+ * 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 "GrVkStencilAttachment.h"
+#include "GrVkGpu.h"
+#include "GrVkImage.h"
+#include "GrVkImageView.h"
+#include "GrVkUtil.h"
+
+#define VK_CALL(GPU, X) GR_VK_CALL(GPU->vkInterface(), X)
+
+GrVkStencilAttachment::GrVkStencilAttachment(GrVkGpu* gpu,
+                                             GrGpuResource::LifeCycle lifeCycle,
+                                             const Format& format,
+                                             const GrVkImage::ImageDesc& desc,
+                                             const GrVkImage::Resource* imageResource,
+                                             const GrVkImageView* stencilView)
+    : INHERITED(gpu, lifeCycle, desc.fWidth, desc.fHeight, format.fStencilBits, desc.fSamples)
+    , fFormat(format)
+    , fImageResource(imageResource)
+    , fStencilView(stencilView) {
+    this->registerWithCache();
+    imageResource->ref();
+    stencilView->ref();
+}
+
+GrVkStencilAttachment* GrVkStencilAttachment::Create(GrVkGpu* gpu,
+                                                     GrGpuResource::LifeCycle lifeCycle,
+                                                     int width,
+                                                     int height,
+                                                     int sampleCnt,
+                                                     const Format& format) {
+    GrVkImage::ImageDesc imageDesc;
+    imageDesc.fImageType = VK_IMAGE_TYPE_2D;
+    imageDesc.fFormat = format.fInternalFormat;
+    imageDesc.fWidth = width;
+    imageDesc.fHeight = height;
+    imageDesc.fLevels = 1;
+    imageDesc.fSamples = sampleCnt;
+    imageDesc.fImageTiling = VK_IMAGE_TILING_OPTIMAL;
+    imageDesc.fUsageFlags = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
+    imageDesc.fMemProps = VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
+
+    const GrVkImage::Resource* imageResource = GrVkImage::CreateResource(gpu, imageDesc);
+    if (!imageResource) {
+        return nullptr;
+    }
+
+    const GrVkImageView* imageView = GrVkImageView::Create(gpu, imageResource->fImage,
+                                                           format.fInternalFormat,
+                                                           GrVkImageView::kStencil_Type);
+    if (!imageView) {
+        imageResource->unref(gpu);
+        return nullptr;
+    }
+
+    GrVkStencilAttachment* stencil = new GrVkStencilAttachment(gpu, lifeCycle, format, imageDesc,
+                                                               imageResource, imageView);
+    imageResource->unref(gpu);
+    imageView->unref(gpu);
+    
+    return stencil;
+}
+
+GrVkStencilAttachment::~GrVkStencilAttachment() {
+    // should have been released or abandoned first
+    SkASSERT(!fImageResource);
+    SkASSERT(!fStencilView);
+}
+
+size_t GrVkStencilAttachment::onGpuMemorySize() const {
+    uint64_t size = this->width();
+    size *= this->height();
+    size *= fFormat.fTotalBits;
+    size *= SkTMax(1,this->numSamples());
+    return static_cast<size_t>(size / 8);
+}
+
+void GrVkStencilAttachment::onRelease() {
+    GrVkGpu* gpu = this->getVkGpu();
+
+    fImageResource->unref(gpu);
+    fImageResource = nullptr;
+
+    fStencilView->unref(gpu);
+    fStencilView = nullptr;
+    INHERITED::onRelease();
+}
+
+void GrVkStencilAttachment::onAbandon() {
+    fImageResource->unrefAndAbandon();
+    fImageResource = nullptr;
+    fStencilView->unrefAndAbandon();
+    fStencilView = nullptr;
+    INHERITED::onAbandon();
+}
+
+GrVkGpu* GrVkStencilAttachment::getVkGpu() const {
+    SkASSERT(!this->wasDestroyed());
+    return static_cast<GrVkGpu*>(this->getGpu());
+}