Add vulkan files into skia repo.

src/gpu/vk/GrVkProgramBuilder.cpp

Index: src/gpu/vk/GrVkProgramBuilder.cpp
diff --git a/src/gpu/vk/GrVkProgramBuilder.cpp b/src/gpu/vk/GrVkProgramBuilder.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..13daf714d909ffe338e4d4bd137bd56962801496
--- /dev/null
+++ b/src/gpu/vk/GrVkProgramBuilder.cpp
@@ -0,0 +1,323 @@
+/*
+* 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 "vk/GrVkProgramBuilder.h"
+
+#include "vk/GrVkGpu.h"
+#include "vk/GrVkRenderPass.h"
+#include "vk/GrVkProgram.h"
+
+GrVkProgram* GrVkProgramBuilder::CreateProgram(GrVkGpu* gpu,
+                                               const DrawArgs& args,
+                                               GrPrimitiveType primitiveType,
+                                               const GrVkRenderPass& renderPass) {
+    // create a builder.  This will be handed off to effects so they can use it to add
+    // uniforms, varyings, textures, etc
+    GrVkProgramBuilder builder(gpu, args);
+
+    GrGLSLExpr4 inputColor;
+    GrGLSLExpr4 inputCoverage;
+
+    if (!builder.emitAndInstallProcs(&inputColor,
+                                     &inputCoverage,
+                                     gpu->vkCaps().maxSampledTextures())) {
+        builder.cleanupFragmentProcessors();
+        return nullptr;
+    }
+
+    return builder.finalize(args, primitiveType, renderPass);
+}
+
+GrVkProgramBuilder::GrVkProgramBuilder(GrVkGpu* gpu, const DrawArgs& args)
+    : INHERITED(args) 
+    , fGpu(gpu)
+    , fVaryingHandler(this) 
+    , fUniformHandler(this) {
+}
+
+const GrCaps* GrVkProgramBuilder::caps() const {
+    return fGpu->caps();
+}
+const GrGLSLCaps* GrVkProgramBuilder::glslCaps() const {
+    return fGpu->vkCaps().glslCaps();
+}
+
+void GrVkProgramBuilder::finalizeFragmentOutputColor(GrGLSLShaderVar& outputColor) {
+    outputColor.setLayoutQualifier("location = 0");
+}
+
+void GrVkProgramBuilder::emitSamplers(const GrProcessor& processor,
+                                      GrGLSLTextureSampler::TextureSamplerArray* outSamplers) {
+    int numTextures = processor.numTextures();
+    UniformHandle* localSamplerUniforms = fSamplerUniforms.push_back_n(numTextures);
+    SkString name;
+    for (int t = 0; t < numTextures; ++t) {
+        name.printf("%d", t);
+        localSamplerUniforms[t]  =
+            fUniformHandler.addUniform(kFragment_GrShaderFlag,
+                                       kSampler2D_GrSLType, kDefault_GrSLPrecision,
+                                       name.c_str());
+        outSamplers->emplace_back(localSamplerUniforms[t], processor.textureAccess(t));
+    }
+}
+
+VkShaderStageFlags visibility_to_vk_stage_flags(uint32_t visibility) {
+    VkShaderStageFlags flags = 0;
+
+    if (visibility & kVertex_GrShaderFlag) {
+        flags |= VK_SHADER_STAGE_VERTEX_BIT;
+    }
+    if (visibility & kGeometry_GrShaderFlag) {
+        flags |= VK_SHADER_STAGE_GEOMETRY_BIT;
+    }
+    if (visibility & kFragment_GrShaderFlag) {
+        flags |= VK_SHADER_STAGE_FRAGMENT_BIT;
+    }
+    return flags;
+}
+
+shaderc_shader_kind vk_shader_stage_to_shaderc_kind(VkShaderStageFlagBits stage) {
+    if (VK_SHADER_STAGE_VERTEX_BIT == stage) {
+        return shaderc_glsl_vertex_shader;
+    }
+    SkASSERT(VK_SHADER_STAGE_FRAGMENT_BIT == stage);
+    return shaderc_glsl_fragment_shader;
+}
+
+bool GrVkProgramBuilder::CreateVkShaderModule(const GrVkGpu* gpu,
+                                              VkShaderStageFlagBits stage,
+                                              const GrGLSLShaderBuilder& builder,
+                                              VkShaderModule* shaderModule,
+                                              VkPipelineShaderStageCreateInfo* stageInfo) {
+    SkString shaderString;
+    for (int i = 0; i < builder.fCompilerStrings.count(); ++i) {
+        if (builder.fCompilerStrings[i]) {
+            shaderString.append(builder.fCompilerStrings[i]);
+            shaderString.append("\n");
+        }
+    }
+
+    shaderc_compiler_t compiler = gpu->shadercCompiler();
+
+    shaderc_compile_options_t options = shaderc_compile_options_initialize();
+    shaderc_compile_options_set_forced_version_profile(options, 140, shaderc_profile_none);
+
+    shaderc_shader_kind shadercStage = vk_shader_stage_to_shaderc_kind(stage);
+    shaderc_spv_module_t module = shaderc_compile_into_spv(compiler,
+                                                           shaderString.c_str(),
+                                                           strlen(shaderString.c_str()),
+                                                           shadercStage,
+                                                           "shader",
+                                                           "main",
+                                                           options);
+    shaderc_compile_options_release(options);
+#ifdef SK_DEBUG
+    if (shaderc_module_get_num_errors(module)) {
+        SkDebugf("%s\n", shaderString.c_str());
+        SkDebugf("%s\n", shaderc_module_get_error_message(module));
+        return false;
+    }
+#endif
+
+    VkShaderModuleCreateInfo moduleCreateInfo;
+    memset(&moduleCreateInfo, 0, sizeof(VkShaderModuleCreateInfo));
+    moduleCreateInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
+    moduleCreateInfo.pNext = nullptr;
+    moduleCreateInfo.flags = 0;
+    moduleCreateInfo.codeSize = shaderc_module_get_length(module);
+    moduleCreateInfo.pCode = (const uint32_t*)shaderc_module_get_bytes(module);
+
+    VkResult err = GR_VK_CALL(gpu->vkInterface(), CreateShaderModule(gpu->device(),
+                                                                     &moduleCreateInfo,
+                                                                     nullptr,
+                                                                     shaderModule));
+    shaderc_module_release(module);
+    if (err) {
+        return false;
+    }
+
+    memset(stageInfo, 0, sizeof(VkPipelineShaderStageCreateInfo));
+    stageInfo->sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
+    stageInfo->pNext = nullptr;
+    stageInfo->flags = 0;
+    stageInfo->stage = stage;
+    stageInfo->module = *shaderModule;
+    stageInfo->pName = "main";
+    stageInfo->pSpecializationInfo = nullptr;
+
+    return true;
+}
+
+GrVkProgram* GrVkProgramBuilder::finalize(const DrawArgs& args,
+                                          GrPrimitiveType primitiveType,
+                                          const GrVkRenderPass& renderPass) {
+    VkDescriptorSetLayout dsLayout[2];
+    VkPipelineLayout pipelineLayout;
+    VkShaderModule vertShaderModule;
+    VkShaderModule fragShaderModule;
+
+    uint32_t numSamplers = fSamplerUniforms.count();
+
+    SkAutoTDeleteArray<VkDescriptorSetLayoutBinding> dsSamplerBindings(
+                                                     new VkDescriptorSetLayoutBinding[numSamplers]);
+    for (uint32_t i = 0; i < numSamplers; ++i) {
+        UniformHandle uniHandle = fSamplerUniforms[i];
+        GrVkUniformHandler::UniformInfo uniformInfo = fUniformHandler.getUniformInfo(uniHandle);
+        SkASSERT(kSampler2D_GrSLType == uniformInfo.fVariable.getType());
+        SkASSERT(0 == uniformInfo.fSetNumber);
+        SkASSERT(uniformInfo.fBinding == i);
+        dsSamplerBindings[i].binding = uniformInfo.fBinding;
+        dsSamplerBindings[i].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
+        dsSamplerBindings[i].descriptorCount = 1;
+        dsSamplerBindings[i].stageFlags = visibility_to_vk_stage_flags(uniformInfo.fVisibility);
+        dsSamplerBindings[i].pImmutableSamplers = nullptr;
+    }
+
+    VkDescriptorSetLayoutCreateInfo dsSamplerLayoutCreateInfo;
+    memset(&dsSamplerLayoutCreateInfo, 0, sizeof(VkDescriptorSetLayoutCreateInfo));
+    dsSamplerLayoutCreateInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
+    dsSamplerLayoutCreateInfo.pNext = nullptr;
+    dsSamplerLayoutCreateInfo.flags = 0;
+    dsSamplerLayoutCreateInfo.bindingCount = fSamplerUniforms.count();
+    // Setting to nullptr fixes an error in the param checker validation layer. Even though
+    // bindingCount is 0 (which is valid), it still tries to validate pBindings unless it is null.
+    dsSamplerLayoutCreateInfo.pBindings = fSamplerUniforms.count() ? dsSamplerBindings.get() :
+                                                                     nullptr;
+
+    GR_VK_CALL_ERRCHECK(fGpu->vkInterface(),
+                        CreateDescriptorSetLayout(fGpu->device(),
+                                                  &dsSamplerLayoutCreateInfo,
+                                                  nullptr,
+                                                  &dsLayout[GrVkUniformHandler::kSamplerDescSet]));
+
+    // Create Uniform Buffer Descriptor
+    // We always attach uniform buffers to descriptor set 1. The vertex uniform buffer will have
+    // binding 0 and the fragment binding 1.
+    VkDescriptorSetLayoutBinding dsUniBindings[2];
+    memset(&dsUniBindings, 0, 2 * sizeof(VkDescriptorSetLayoutBinding));
+    dsUniBindings[0].binding = GrVkUniformHandler::kVertexBinding;
+    dsUniBindings[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    dsUniBindings[0].descriptorCount = fUniformHandler.hasVertexUniforms() ? 1 : 0;
+    dsUniBindings[0].stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
+    dsUniBindings[0].pImmutableSamplers = nullptr;
+    dsUniBindings[1].binding = GrVkUniformHandler::kFragBinding;
+    dsUniBindings[1].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
+    dsUniBindings[1].descriptorCount = fUniformHandler.hasFragmentUniforms() ? 1 : 0;
+    dsUniBindings[1].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
+    dsUniBindings[1].pImmutableSamplers = nullptr;
+
+    VkDescriptorSetLayoutCreateInfo dsUniformLayoutCreateInfo;
+    memset(&dsUniformLayoutCreateInfo, 0, sizeof(VkDescriptorSetLayoutCreateInfo));
+    dsUniformLayoutCreateInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
+    dsUniformLayoutCreateInfo.pNext = nullptr;
+    dsUniformLayoutCreateInfo.flags = 0;
+    dsUniformLayoutCreateInfo.bindingCount = 2;
+    dsUniformLayoutCreateInfo.pBindings = dsUniBindings;
+
+    GR_VK_CALL_ERRCHECK(fGpu->vkInterface(), CreateDescriptorSetLayout(
+                                             fGpu->device(),
+                                             &dsUniformLayoutCreateInfo,
+                                             nullptr,
+                                             &dsLayout[GrVkUniformHandler::kUniformBufferDescSet]));
+
+    // 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;
+
+    GR_VK_CALL_ERRCHECK(fGpu->vkInterface(), CreatePipelineLayout(fGpu->device(),
+                                                                  &layoutCreateInfo,
+                                                                  nullptr,
+                                                                  &pipelineLayout));
+
+    // We need to enable the following extensions so that the compiler can correctly make spir-v
+    // from our glsl shaders.
+    fVS.extensions().appendf("#extension GL_ARB_separate_shader_objects : enable\n");
+    fFS.extensions().appendf("#extension GL_ARB_separate_shader_objects : enable\n");
+    fVS.extensions().appendf("#extension GL_ARB_shading_language_420pack : enable\n");
+    fFS.extensions().appendf("#extension GL_ARB_shading_language_420pack : enable\n");
+
+    this->finalizeShaders();
+
+    VkPipelineShaderStageCreateInfo shaderStageInfo[2];
+    SkAssertResult(CreateVkShaderModule(fGpu,
+                                        VK_SHADER_STAGE_VERTEX_BIT,
+                                        fVS,
+                                        &vertShaderModule,
+                                        &shaderStageInfo[0]));
+
+    SkAssertResult(CreateVkShaderModule(fGpu,
+                                        VK_SHADER_STAGE_FRAGMENT_BIT,
+                                        fFS,
+                                        &fragShaderModule,
+                                        &shaderStageInfo[1]));
+
+    GrVkResourceProvider& resourceProvider = fGpu->resourceProvider();
+    GrVkPipeline* pipeline = resourceProvider.createPipeline(*args.fPipeline,
+                                                             *args.fPrimitiveProcessor,
+                                                             shaderStageInfo,
+                                                             2,
+                                                             primitiveType,
+                                                             renderPass,
+                                                             pipelineLayout);
+    GR_VK_CALL(fGpu->vkInterface(), DestroyShaderModule(fGpu->device(), vertShaderModule,
+                                                        nullptr));
+    GR_VK_CALL(fGpu->vkInterface(), DestroyShaderModule(fGpu->device(), fragShaderModule,
+                                                        nullptr));
+
+    if (!pipeline) {
+        GR_VK_CALL(fGpu->vkInterface(), DestroyPipelineLayout(fGpu->device(), pipelineLayout,
+                                                              nullptr));
+        GR_VK_CALL(fGpu->vkInterface(), DestroyDescriptorSetLayout(fGpu->device(), dsLayout[0],
+                                                                   nullptr));
+        GR_VK_CALL(fGpu->vkInterface(), DestroyDescriptorSetLayout(fGpu->device(), dsLayout[1],
+                                                                   nullptr));
+        return nullptr;
+    }
+
+
+    GrVkDescriptorPool::DescriptorTypeCounts typeCounts;
+    typeCounts.setTypeCount(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 2);
+    SkASSERT(numSamplers < 256);
+    typeCounts.setTypeCount(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, (uint8_t)numSamplers);
+    GrVkDescriptorPool* descriptorPool =
+        fGpu->resourceProvider().findOrCreateCompatibleDescriptorPool(typeCounts);
+
+    VkDescriptorSetAllocateInfo dsAllocateInfo;
+    memset(&dsAllocateInfo, 0, sizeof(VkDescriptorSetAllocateInfo));
+    dsAllocateInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
+    dsAllocateInfo.pNext = nullptr;
+    dsAllocateInfo.descriptorPool = descriptorPool->descPool();
+    dsAllocateInfo.descriptorSetCount = 2;
+    dsAllocateInfo.pSetLayouts = dsLayout;
+
+    VkDescriptorSet descriptorSets[2];
+    GR_VK_CALL_ERRCHECK(fGpu->vkInterface(), AllocateDescriptorSets(fGpu->device(),
+                                                                    &dsAllocateInfo,
+                                                                    descriptorSets));
+
+    return new GrVkProgram(fGpu,
+                           pipeline,
+                           pipelineLayout,
+                           dsLayout,
+                           descriptorPool,
+                           descriptorSets,
+                           fUniformHandles,
+                           fUniformHandler.fUniforms,
+                           fUniformHandler.fCurrentVertexUBOOffset,
+                           fUniformHandler.fCurrentFragmentUBOOffset,
+                           numSamplers,
+                           fGeometryProcessor,
+                           fXferProcessor,
+                           fFragmentProcessors);
+}