Add GrVkCopyPipeline to handle vulkan copies as draws

src/gpu/vk/GrVkCopyManager.cpp

Index: src/gpu/vk/GrVkCopyManager.cpp
diff --git a/src/gpu/vk/GrVkCopyManager.cpp b/src/gpu/vk/GrVkCopyManager.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..293863d002b4f9a97ac650c51e06393d7e9d28d6
--- /dev/null
+++ b/src/gpu/vk/GrVkCopyManager.cpp
@@ -0,0 +1,409 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+*/
+
+#include "GrVkCopyManager.h"
+
+#include "GrSurface.h"
+#include "GrTextureParams.h"
+#include "GrTexturePriv.h"
+#include "GrVkCommandBuffer.h"
+#include "GrVkCopyPipeline.h"
+#include "GrVkDescriptorSet.h"
+#include "GrVkGpu.h"
+#include "GrVkImageView.h"
+#include "GrVkRenderTarget.h"
+#include "GrVkResourceProvider.h"
+#include "GrVkSampler.h"
+#include "GrVkTexture.h"
+#include "GrVkUniformBuffer.h"
+#include "GrVkVertexBuffer.h"
+#include "SkPoint.h"
+#include "SkRect.h"
+
+bool GrVkCopyManager::createCopyProgram(GrVkGpu* gpu) {
+    const GrGLSLCaps* glslCaps = gpu->vkCaps().glslCaps();
+    const char* version = glslCaps->versionDeclString();
+    SkString vertShaderText(version);
+    vertShaderText.append(
+        "#extension GL_ARB_separate_shader_objects : enable\n"
+        "#extension GL_ARB_shading_language_420pack : enable\n"
+
+        "layout(set = 0, binding = 0) uniform vertexUniformBuffer {"
+            "mediump vec4 uPosXform;"
+            "mediump vec4 uTexCoordXform;"
+        "};"
+        "layout(location = 0) in highp vec2 inPosition;"
+        "layout(location = 1) out mediump vec2 vTexCoord;"
+
+        "// Copy Program VS\n"
+        "void main() {"
+            "vTexCoord = inPosition * uTexCoordXform.xy + uTexCoordXform.zw;"
+            "gl_Position.xy = inPosition * uPosXform.xy + uPosXform.zw;"
+            "gl_Position.zw = vec2(0, 1);"
+        "}"
+    );
+
+    SkString fragShaderText(version);
+    fragShaderText.append(
+        "#extension GL_ARB_separate_shader_objects : enable\n"
+        "#extension GL_ARB_shading_language_420pack : enable\n"
+
+        "precision mediump float;"
+
+        "layout(set = 1, binding = 0) uniform mediump sampler2D uTextureSampler;"
+        "layout(location = 1) in mediump vec2 vTexCoord;"
+        "layout(location = 0, index = 0) out mediump vec4 fsColorOut;"
+
+        "// Copy Program FS\n"
+        "void main() {"
+            "fsColorOut = texture(uTextureSampler, vTexCoord);"
+        "}"
+    );
+
+    if (!GrCompileVkShaderModule(gpu, vertShaderText.c_str(),
+                                 VK_SHADER_STAGE_VERTEX_BIT,
+                                 &fVertShaderModule, &fShaderStageInfo[0])) {
+        this->destroyResources(gpu);
+        return false;
+    }
+
+    if (!GrCompileVkShaderModule(gpu, fragShaderText.c_str(),
+                                 VK_SHADER_STAGE_FRAGMENT_BIT,
+                                 &fFragShaderModule, &fShaderStageInfo[1])) {
+        this->destroyResources(gpu);
+        return false;
+    }
+
+    VkDescriptorSetLayout dsLayout[2];
+
+    GrVkResourceProvider& resourceProvider = gpu->resourceProvider();
+
+    dsLayout[GrVkUniformHandler::kUniformBufferDescSet] = resourceProvider.getUniformDSLayout();
+
+    uint32_t samplerVisibility = kFragment_GrShaderFlag;
+    SkTArray<uint32_t> visibilityArray(&samplerVisibility, 1);
+
+    resourceProvider.getSamplerDescriptorSetHandle(visibilityArray, &fSamplerDSHandle);
+    dsLayout[GrVkUniformHandler::kSamplerDescSet] =
+        resourceProvider.getSamplerDSLayout(fSamplerDSHandle);
+
+    // Create the VkPipelineLayout
+    VkPipelineLayoutCreateInfo layoutCreateInfo;
+    memset(&layoutCreateInfo, 0, sizeof(VkPipelineLayoutCreateFlags));
+    layoutCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
+    layoutCreateInfo.pNext = 0;
+    layoutCreateInfo.flags = 0;
+    layoutCreateInfo.setLayoutCount = 2;
+    layoutCreateInfo.pSetLayouts = dsLayout;
+    layoutCreateInfo.pushConstantRangeCount = 0;
+    layoutCreateInfo.pPushConstantRanges = nullptr;
+
+    VkResult err = GR_VK_CALL(gpu->vkInterface(), CreatePipelineLayout(gpu->device(),
+                                                                       &layoutCreateInfo,
+                                                                       nullptr,
+                                                                       &fPipelineLayout));
+    if (err) {
+        this->destroyResources(gpu);
+        return false;
+    }
+
+    static const float vdata[] = {
+        0, 0,
+        0, 1,
+        1, 0,
+        1, 1
+    };
+    fVertexBuffer.reset(GrVkVertexBuffer::Create(gpu, sizeof(vdata), false));
+    SkASSERT(fVertexBuffer.get());
+    fVertexBuffer->updateData(vdata, sizeof(vdata));
+
+    // We use 2 vec4's for uniforms
+    fUniformBuffer = GrVkUniformBuffer::Create(gpu, 8 * sizeof(float));
+    SkASSERT(fUniformBuffer);
+
+    return true;
+}
+
+bool GrVkCopyManager::copySurfaceAsDraw(GrVkGpu* gpu,
+                                        GrSurface* dst,
+                                        GrSurface* src,
+                                        const SkIRect& srcRect,
+                                        const SkIPoint& dstPoint) {
+    if (!gpu->vkCaps().supportsCopiesAsDraws()) {
+        return false;
+    }
+
+    GrVkRenderTarget* rt = static_cast<GrVkRenderTarget*>(dst->asRenderTarget());
+    if (!rt) {
+        return false;
+    }
+
+    GrVkTexture* srcTex = static_cast<GrVkTexture*>(src->asTexture());
+    if (!srcTex) {
+        return false;
+    }
+
+    if (VK_NULL_HANDLE == fVertShaderModule) {
+        SkASSERT(VK_NULL_HANDLE == fFragShaderModule &&
+                 VK_NULL_HANDLE == fPipelineLayout &&
+                 nullptr == fVertexBuffer.get() &&
+                 nullptr == fUniformBuffer);
+        if (!this->createCopyProgram(gpu)) {
+            SkDebugf("Failed to create copy program.\n");
+            return false;
+        }
+    }
+
+    GrVkResourceProvider& resourceProv = gpu->resourceProvider();
+
+    GrVkCopyPipeline* pipeline = resourceProv.findOrCreateCopyPipeline(rt,
+                                                                       fShaderStageInfo,
+                                                                       fPipelineLayout);
+    if (!pipeline) {
+        return false;
+    }
+
+    // UPDATE UNIFORM DESCRIPTOR SET
+    int w = srcRect.width();
+    int h = srcRect.height();
+
+    // dst rect edges in NDC (-1 to 1)
+    int dw = dst->width();
+    int dh = dst->height();
+    float dx0 = 2.f * dstPoint.fX / dw - 1.f;
+    float dx1 = 2.f * (dstPoint.fX + w) / dw - 1.f;
+    float dy0 = 2.f * dstPoint.fY / dh - 1.f;
+    float dy1 = 2.f * (dstPoint.fY + h) / dh - 1.f;
+    if (kBottomLeft_GrSurfaceOrigin == dst->origin()) {
+        dy0 = -dy0;
+        dy1 = -dy1;
+    }
+
+
+    float sx0 = (float)srcRect.fLeft;
+    float sx1 = (float)(srcRect.fLeft + w);
+    float sy0 = (float)srcRect.fTop;
+    float sy1 = (float)(srcRect.fTop + h);
+    int sh = src->height();
+    if (kBottomLeft_GrSurfaceOrigin == src->origin()) {
+        sy0 = sh - sy0;
+        sy1 = sh - sy1;
+    }
+    // src rect edges in normalized texture space (0 to 1).
+    int sw = src->width();
+    sx0 /= sw;
+    sx1 /= sw;
+    sy0 /= sh;
+    sy1 /= sh;
+
+    float uniData[] = { dx1 - dx0, dy1 - dy0, dx0, dy0,    // posXform
+                        sx1 - sx0, sy1 - sy0, sx0, sy0 };  // texCoordXform
+
+    fUniformBuffer->updateData(gpu, uniData, sizeof(uniData), nullptr);
+
+    const GrVkDescriptorSet* uniformDS = resourceProv.getUniformDescriptorSet();
+    SkASSERT(uniformDS);
+
+    VkDescriptorBufferInfo uniBufferInfo;
+    uniBufferInfo.buffer = fUniformBuffer->buffer();
+    uniBufferInfo.offset = fUniformBuffer->offset();
+    uniBufferInfo.range = fUniformBuffer->size();
+
+    VkWriteDescriptorSet descriptorWrites;
+    descriptorWrites.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+    descriptorWrites.pNext = nullptr;
+    descriptorWrites.dstSet = uniformDS->descriptorSet();
+    descriptorWrites.dstBinding = GrVkUniformHandler::kVertexBinding;
+    descriptorWrites.dstArrayElement = 0;
+    descriptorWrites.descriptorCount = 1;
+    descriptorWrites.descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    descriptorWrites.pImageInfo = nullptr;
+    descriptorWrites.pBufferInfo = &uniBufferInfo;
+    descriptorWrites.pTexelBufferView = nullptr;
+
+    GR_VK_CALL(gpu->vkInterface(), UpdateDescriptorSets(gpu->device(),
+                                                        1,
+                                                        &descriptorWrites,
+                                                        0, nullptr));
+
+    // UPDATE SAMPLER DESCRIPTOR SET
+    const GrVkDescriptorSet* samplerDS =
+        gpu->resourceProvider().getSamplerDescriptorSet(fSamplerDSHandle);
+
+    GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode);
+
+    GrVkSampler* sampler =
+        resourceProv.findOrCreateCompatibleSampler(params, srcTex->texturePriv().maxMipMapLevel());
+
+    VkDescriptorImageInfo imageInfo;
+    memset(&imageInfo, 0, sizeof(VkDescriptorImageInfo));
+    imageInfo.sampler = sampler->sampler();
+    imageInfo.imageView = srcTex->textureView(true)->imageView();
+    imageInfo.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
+
+    VkWriteDescriptorSet writeInfo;
+    memset(&writeInfo, 0, sizeof(VkWriteDescriptorSet));
+    writeInfo.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
+    writeInfo.pNext = nullptr;
+    writeInfo.dstSet = samplerDS->descriptorSet();
+    writeInfo.dstBinding = 0;
+    writeInfo.dstArrayElement = 0;
+    writeInfo.descriptorCount = 1;
+    writeInfo.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
+    writeInfo.pImageInfo = &imageInfo;
+    writeInfo.pBufferInfo = nullptr;
+    writeInfo.pTexelBufferView = nullptr;
+
+    GR_VK_CALL(gpu->vkInterface(), UpdateDescriptorSets(gpu->device(),
+                                                        1,
+                                                        &writeInfo,
+                                                        0, nullptr));
+
+    VkDescriptorSet vkDescSets[] = { uniformDS->descriptorSet(), samplerDS->descriptorSet() };
+
+    GrVkRenderTarget* texRT = static_cast<GrVkRenderTarget*>(srcTex->asRenderTarget());
+    if (texRT) {
+        gpu->onResolveRenderTarget(texRT);
+    }
+
+    GrVkPrimaryCommandBuffer* cmdBuffer = gpu->currentCommandBuffer();
+
+    // TODO: Make tighter bounds and then adjust bounds for origin and granularity if we see
+    //       any perf issues with using the whole bounds
+    SkIRect bounds = SkIRect::MakeWH(rt->width(), rt->height());
+
+    // Change layouts of rt and texture
+    GrVkImage* targetImage = rt->msaaImage() ? rt->msaaImage() : rt;
+    targetImage->setImageLayout(gpu,
+                                VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+                                VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
+                                VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT,
+                                false);
+
+    srcTex->setImageLayout(gpu,
+                           VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
+                           VK_ACCESS_SHADER_READ_BIT,
+                           VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT,
+                           false);
+
+    GrVkRenderPass::LoadStoreOps vkColorOps(VK_ATTACHMENT_LOAD_OP_DONT_CARE,
+                                            VK_ATTACHMENT_STORE_OP_STORE);
+    GrVkRenderPass::LoadStoreOps vkStencilOps(VK_ATTACHMENT_LOAD_OP_DONT_CARE,
+                                              VK_ATTACHMENT_STORE_OP_STORE);
+    GrVkRenderPass::LoadStoreOps vkResolveOps(VK_ATTACHMENT_LOAD_OP_DONT_CARE,
+                                              VK_ATTACHMENT_STORE_OP_STORE);
+    const GrVkRenderPass* renderPass;
+    const GrVkResourceProvider::CompatibleRPHandle& rpHandle =
+        rt->compatibleRenderPassHandle();
+    if (rpHandle.isValid()) {
+        renderPass = gpu->resourceProvider().findRenderPass(rpHandle,
+                                                            vkColorOps,
+                                                            vkResolveOps,
+                                                            vkStencilOps);
+    } else {
+        renderPass = gpu->resourceProvider().findRenderPass(*rt,
+                                                            vkColorOps,
+                                                            vkResolveOps,
+                                                            vkStencilOps);
+    }
+
+    SkASSERT(renderPass->isCompatible(*rt->simpleRenderPass()));
+
+
+    cmdBuffer->beginRenderPass(gpu, renderPass, 0, nullptr, *rt, bounds, false);
+    cmdBuffer->bindPipeline(gpu, pipeline);
+
+    // Uniform DescriptorSet, Sampler DescriptorSet, and vertex shader uniformBuffer
+    SkSTArray<3, const GrVkRecycledResource*> descriptorRecycledResources;
+    descriptorRecycledResources.push_back(uniformDS);
+    descriptorRecycledResources.push_back(samplerDS);
+    descriptorRecycledResources.push_back(fUniformBuffer->resource());
+
+    // One sampler, texture view, and texture
+    SkSTArray<3, const GrVkResource*> descriptorResources;
+    descriptorResources.push_back(sampler);
+    descriptorResources.push_back(srcTex->textureView(true));
+    descriptorResources.push_back(srcTex->resource());
+
+    cmdBuffer->bindDescriptorSets(gpu,
+                                  descriptorRecycledResources,
+                                  descriptorResources,
+                                  fPipelineLayout,
+                                  0,
+                                  2,
+                                  vkDescSets,
+                                  0,
+                                  nullptr);
+
+    // Set Dynamic viewport and stencil
+    // We always use one viewport the size of the RT
+    VkViewport viewport;
+    viewport.x = 0.0f;
+    viewport.y = 0.0f;
+    viewport.width = SkIntToScalar(rt->width());
+    viewport.height = SkIntToScalar(rt->height());
+    viewport.minDepth = 0.0f;
+    viewport.maxDepth = 1.0f;
+    cmdBuffer->setViewport(gpu, 0, 1, &viewport);
+
+    // We assume the scissor is not enabled so just set it to the whole RT
+    VkRect2D scissor;
+    scissor.extent.width = rt->width();
+    scissor.extent.height = rt->height();
+    scissor.offset.x = 0;
+    scissor.offset.y = 0;
+    cmdBuffer->setScissor(gpu, 0, 1, &scissor);
+
+    cmdBuffer->bindVertexBuffer(gpu, fVertexBuffer);
+    cmdBuffer->draw(gpu, 4, 1, 0, 0);
+    cmdBuffer->endRenderPass(gpu);
+
+    // Release all temp resources which should now be reffed by the cmd buffer
+    pipeline->unref(gpu);
+    uniformDS->unref(gpu);
+    samplerDS->unref(gpu);
+    sampler->unref(gpu);
+    renderPass->unref(gpu);
+
+    return true;
+}
+
+void GrVkCopyManager::destroyResources(GrVkGpu* gpu) {
+    if (VK_NULL_HANDLE != fVertShaderModule) {
+        GR_VK_CALL(gpu->vkInterface(), DestroyShaderModule(gpu->device(), fVertShaderModule,
+                                                           nullptr));
+        fVertShaderModule = VK_NULL_HANDLE;
+    }
+
+    if (VK_NULL_HANDLE != fFragShaderModule) {
+        GR_VK_CALL(gpu->vkInterface(), DestroyShaderModule(gpu->device(), fFragShaderModule,
+                                                           nullptr));
+        fFragShaderModule = VK_NULL_HANDLE;
+    }
+
+    if (VK_NULL_HANDLE != fPipelineLayout) {
+        GR_VK_CALL(gpu->vkInterface(), DestroyPipelineLayout(gpu->device(), fPipelineLayout,
+                                                             nullptr));
+        fPipelineLayout = VK_NULL_HANDLE;
+    }
+
+    if (fUniformBuffer) {
+        fUniformBuffer->release(gpu);
+        fUniformBuffer = nullptr;
+    }
+}
+
+void GrVkCopyManager::abandonResources() {
+    fVertShaderModule = VK_NULL_HANDLE;
+    fFragShaderModule = VK_NULL_HANDLE;
+    fPipelineLayout = VK_NULL_HANDLE;
+
+    if (fUniformBuffer) {
+        fUniformBuffer->abandon();
+        fUniformBuffer = nullptr;
+    }
+}