Add vulkan files into skia repo.

tests/VkUploadPixelsTests.cpp

Index: tests/VkUploadPixelsTests.cpp
diff --git a/tests/VkUploadPixelsTests.cpp b/tests/VkUploadPixelsTests.cpp
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+++ b/tests/VkUploadPixelsTests.cpp
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+
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// This is a GPU-backend specific test. It relies on static intializers to work
+
+#include "SkTypes.h"
+
+#if SK_SUPPORT_GPU && SK_ALLOW_STATIC_GLOBAL_INITIALIZERS && defined(SK_VULKAN)
+
+#include "GrContextFactory.h"
+#include "GrTest.h"
+#include "Test.h"
+#include "vk/GrVkGpu.h"
+
+
+void fill_pixel_data(int width, int height, GrColor* data) {
+
+    // build red-green gradient
+    for (int j = 0; j < height; ++j) {
+        for (int i = 0; i < width; ++i) {
+            unsigned int red = (unsigned int)(256.f*(i / (float)width));
+            unsigned int green = (unsigned int)(256.f*(j / (float)height));
+            data[i + j*width] = GrColorPackRGBA(red - (red>>8), green - (green>>8), 0xff, 0xff);
+        }
+    }
+}
+
+bool does_full_buffer_contain_correct_color(GrColor* srcBuffer,
+                                            GrColor* dstBuffer,
+                                            GrPixelConfig config,
+                                            int width,
+                                            int height) {
+    GrColor* srcPtr = srcBuffer;
+    GrColor* dstPtr = dstBuffer;
+    for (int j = 0; j < height; ++j) {
+        for (int i = 0; i < width; ++i) {
+            if (srcPtr[i] != dstPtr[i]) {
+                return false;
+            }
+        }
+        srcPtr += width;
+        dstPtr += width;
+    }
+    return true;
+}
+
+void basic_texture_test(skiatest::Reporter* reporter, GrContext* context, GrPixelConfig config,
+                        bool renderTarget, bool linearTiling) {
+    GrVkGpu* gpu = static_cast<GrVkGpu*>(context->getGpu());
+    gpu->discard(NULL);
+
+    const int kWidth = 16;
+    const int kHeight = 16;
+    SkAutoTMalloc<GrColor> srcBuffer(kWidth*kHeight);
+    SkAutoTMalloc<GrColor> dstBuffer(kWidth*kHeight);
+
+    fill_pixel_data(kWidth, kHeight, srcBuffer.get());
+
+    const GrVkCaps* caps = reinterpret_cast<const GrVkCaps*>(context->caps());
+
+    bool canCreate = true;
+    // the expectation is that the given config is texturable/renderable with optimal tiling
+    // but may not be with linear tiling
+    if (linearTiling) {
+        if (!caps->isConfigTexurableLinearly(config) ||
+            (renderTarget && !caps->isConfigRenderableLinearly(config, false))) {
+            canCreate = false;
+        }
+    }
+
+    GrSurfaceDesc surfDesc;
+    surfDesc.fFlags = renderTarget ? kRenderTarget_GrSurfaceFlag : kNone_GrSurfaceFlags;
+    if (linearTiling) {
+        surfDesc.fFlags |= kZeroCopy_GrSurfaceFlag;
+    }
+    surfDesc.fOrigin = kTopLeft_GrSurfaceOrigin;
+    surfDesc.fWidth = kWidth;
+    surfDesc.fHeight = kHeight;
+    surfDesc.fConfig = config;
+    surfDesc.fSampleCnt = 0;
+    GrTexture* tex0 = gpu->createTexture(surfDesc, false, srcBuffer, 0);
+    if (tex0) {
+        REPORTER_ASSERT(reporter, canCreate);
+        gpu->readPixels(tex0, 0, 0, kWidth, kHeight, config, dstBuffer, 0);
+        REPORTER_ASSERT(reporter, does_full_buffer_contain_correct_color(srcBuffer,
+                                                                         dstBuffer,
+                                                                         config,
+                                                                         kWidth,
+                                                                         kHeight));
+
+        tex0->writePixels(2, 10, 10, 2, config, srcBuffer);
+        memset(dstBuffer, 0, kWidth*kHeight*sizeof(GrColor));
+        gpu->readPixels(tex0, 2, 10, 10, 2, config, dstBuffer, 0);
+        REPORTER_ASSERT(reporter, does_full_buffer_contain_correct_color(srcBuffer,
+                                                                         dstBuffer,
+                                                                         config,
+                                                                         10,
+                                                                         2));
+
+        tex0->unref();
+    } else {
+        REPORTER_ASSERT(reporter, !canCreate);
+    }
+
+    surfDesc.fOrigin = kBottomLeft_GrSurfaceOrigin;
+    GrTexture* tex1 = gpu->createTexture(surfDesc, false, srcBuffer, 0);
+    if (tex1) {
+        REPORTER_ASSERT(reporter, canCreate);
+        gpu->readPixels(tex1, 0, 0, kWidth, kHeight, config, dstBuffer, 0);
+        REPORTER_ASSERT(reporter, does_full_buffer_contain_correct_color(srcBuffer,
+                                                                         dstBuffer,
+                                                                         config,
+                                                                         kWidth,
+                                                                         kHeight));
+
+        tex1->writePixels(5, 4, 4, 5, config, srcBuffer);
+        memset(dstBuffer, 0, kWidth*kHeight*sizeof(GrColor));
+        gpu->readPixels(tex1, 5, 4, 4, 5, config, dstBuffer, 0);
+        REPORTER_ASSERT(reporter, does_full_buffer_contain_correct_color(srcBuffer,
+                                                                         dstBuffer,
+                                                                         config,
+                                                                         4,
+                                                                         5));
+
+        tex1->unref();
+    } else {
+        REPORTER_ASSERT(reporter, !canCreate);
+    }
+}
+
+DEF_GPUTEST(VkUploadPixelsTests, reporter, factory) {
+    GrContextOptions opts;
+    opts.fSuppressPrints = true;
+    GrContextFactory debugFactory(opts);
+    for (int type = 0; type < GrContextFactory::kLastGLContextType; ++type) {
+        if (static_cast<GrContextFactory::GLContextType>(type) !=
+            GrContextFactory::kNative_GLContextType) {
+            continue;
+        }
+        GrContext* context = debugFactory.get(static_cast<GrContextFactory::GLContextType>(type));
+        if (context) {
+            basic_texture_test(reporter, context, kRGBA_8888_GrPixelConfig, false, false);
+            basic_texture_test(reporter, context, kRGBA_8888_GrPixelConfig, true, false);
+            basic_texture_test(reporter, context, kRGBA_8888_GrPixelConfig, false, true);
+            basic_texture_test(reporter, context, kRGBA_8888_GrPixelConfig, true, true);
+            basic_texture_test(reporter, context, kBGRA_8888_GrPixelConfig, false, false);
+            basic_texture_test(reporter, context, kBGRA_8888_GrPixelConfig, true, false);
+            basic_texture_test(reporter, context, kBGRA_8888_GrPixelConfig, false, true);
+            basic_texture_test(reporter, context, kBGRA_8888_GrPixelConfig, true, true);
+        }
+
+    }
+}
+
+#endif