327 lines
No EOL
12 KiB
C++
327 lines
No EOL
12 KiB
C++
/*
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* Vulkan Example - Viewport array with single pass rendering using geometry shaders
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*
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* Copyright (C) 2017 by Sascha Willems - www.saschawillems.de
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*
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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*/
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#include "vulkanexamplebase.h"
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#include "VulkanglTFModel.h"
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#define ENABLE_VALIDATION false
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class VulkanExample : public VulkanExampleBase
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{
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public:
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vkglTF::Model scene;
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struct UBOGS {
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glm::mat4 projection[2];
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glm::mat4 modelview[2];
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glm::vec4 lightPos = glm::vec4(-2.5f, -3.5f, 0.0f, 1.0f);
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} uboGS;
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vks::Buffer uniformBufferGS;
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VkPipeline pipeline;
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VkPipelineLayout pipelineLayout;
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VkDescriptorSet descriptorSet;
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VkDescriptorSetLayout descriptorSetLayout;
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// Camera and view properties
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float eyeSeparation = 0.08f;
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const float focalLength = 0.5f;
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const float fov = 90.0f;
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const float zNear = 0.1f;
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const float zFar = 256.0f;
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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title = "Viewport arrays";
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camera.type = Camera::CameraType::firstperson;
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camera.setRotation(glm::vec3(0.0f, 90.0f, 0.0f));
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camera.setTranslation(glm::vec3(7.0f, 3.2f, 0.0f));
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camera.setMovementSpeed(5.0f);
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}
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~VulkanExample()
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{
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vkDestroyPipeline(device, pipeline, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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uniformBufferGS.destroy();
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}
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// Enable physical device features required for this example
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virtual void getEnabledFeatures()
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{
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// Geometry shader support is required for this example
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if (deviceFeatures.geometryShader) {
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enabledFeatures.geometryShader = VK_TRUE;
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}
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else {
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vks::tools::exitFatal("Selected GPU does not support geometry shaders!", VK_ERROR_FEATURE_NOT_PRESENT);
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}
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// Multiple viewports must be supported
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if (deviceFeatures.multiViewport) {
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enabledFeatures.multiViewport = VK_TRUE;
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}
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else {
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vks::tools::exitFatal("Selected GPU does not support multi viewports!", VK_ERROR_FEATURE_NOT_PRESENT);
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}
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}
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void buildCommandBuffers()
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{
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VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
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VkClearValue clearValues[2];
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clearValues[0].color = defaultClearColor;
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clearValues[1].depthStencil = { 1.0f, 0 };
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VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
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renderPassBeginInfo.renderPass = renderPass;
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renderPassBeginInfo.renderArea.offset.x = 0;
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renderPassBeginInfo.renderArea.offset.y = 0;
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renderPassBeginInfo.renderArea.extent.width = width;
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renderPassBeginInfo.renderArea.extent.height = height;
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renderPassBeginInfo.clearValueCount = 2;
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renderPassBeginInfo.pClearValues = clearValues;
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for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
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{
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// Set target frame buffer
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renderPassBeginInfo.framebuffer = frameBuffers[i];
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VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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VkViewport viewports[2];
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// Left
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viewports[0] = { 0, 0, (float)width / 2.0f, (float)height, 0.0, 1.0f };
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// Right
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viewports[1] = { (float)width / 2.0f, 0, (float)width / 2.0f, (float)height, 0.0, 1.0f };
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vkCmdSetViewport(drawCmdBuffers[i], 0, 2, viewports);
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VkRect2D scissorRects[2] = {
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vks::initializers::rect2D(width/2, height, 0, 0),
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vks::initializers::rect2D(width/2, height, width / 2, 0),
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};
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vkCmdSetScissor(drawCmdBuffers[i], 0, 2, scissorRects);
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vkCmdSetLineWidth(drawCmdBuffers[i], 1.0f);
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
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scene.draw(drawCmdBuffers[i]);
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drawUI(drawCmdBuffers[i]);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void loadAssets()
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{
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scene.loadFromFile(getAssetPath() + "models/sampleroom.gltf", vulkanDevice, queue, vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY);
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}
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void setupDescriptorPool()
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{
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// Example uses two ubos
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std::vector<VkDescriptorPoolSize> poolSizes = {
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo =
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vks::initializers::descriptorPoolCreateInfo(static_cast<uint32_t>(poolSizes.size()), poolSizes.data(), 1);
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
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}
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void setupDescriptorSetLayout()
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{
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_GEOMETRY_BIT, 0) // Binding 1: Geometry shader ubo
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};
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VkDescriptorSetLayoutCreateInfo descriptorLayout =
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vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
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VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
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vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
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}
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void setupDescriptorSet()
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{
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VkDescriptorSetAllocateInfo allocInfo =
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vks::initializers::descriptorSetAllocateInfo(
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descriptorPool,
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&descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
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std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
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vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBufferGS.descriptor), // Binding 0 :Geometry shader ubo
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};
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vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);
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}
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void preparePipelines()
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{
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
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VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE);
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VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
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// We use two viewports
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VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(2, 2, 0);
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VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
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std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR, VK_DYNAMIC_STATE_LINE_WIDTH };
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VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
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std::array<VkPipelineShaderStageCreateInfo, 3> shaderStages;
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VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass);
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pipelineCI.pInputAssemblyState = &inputAssemblyState;
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pipelineCI.pRasterizationState = &rasterizationState;
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pipelineCI.pColorBlendState = &colorBlendState;
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pipelineCI.pMultisampleState = &multisampleState;
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pipelineCI.pViewportState = &viewportState;
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pipelineCI.pDepthStencilState = &depthStencilState;
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pipelineCI.pDynamicState = &dynamicState;
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pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
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pipelineCI.pStages = shaderStages.data();
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pipelineCI.renderPass = renderPass;
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pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::Color});
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shaderStages[0] = loadShader(getShadersPath() + "viewportarray/scene.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
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shaderStages[1] = loadShader(getShadersPath() + "viewportarray/scene.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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// A geometry shader is used to output geometry to multiple viewports in one single pass
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// See the "invocations" decorator of the layout input in the shader
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shaderStages[2] = loadShader(getShadersPath() + "viewportarray/multiview.geom.spv", VK_SHADER_STAGE_GEOMETRY_BIT);
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VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
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}
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// Prepare and initialize uniform buffer containing shader uniforms
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void prepareUniformBuffers()
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{
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// Geometry shader uniform buffer block
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&uniformBufferGS,
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sizeof(uboGS)));
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// Map persistent
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VK_CHECK_RESULT(uniformBufferGS.map());
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updateUniformBuffers();
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}
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void updateUniformBuffers()
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{
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// Geometry shader matrices for the two viewports
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// See http://paulbourke.net/stereographics/stereorender/
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// Calculate some variables
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float aspectRatio = (float)(width * 0.5f) / (float)height;
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float wd2 = zNear * tan(glm::radians(fov / 2.0f));
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float ndfl = zNear / focalLength;
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float left, right;
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float top = wd2;
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float bottom = -wd2;
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glm::vec3 camFront;
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camFront.x = -cos(glm::radians(camera.rotation.x)) * sin(glm::radians(camera.rotation.y));
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camFront.y = sin(glm::radians(camera.rotation.x));
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camFront.z = cos(glm::radians(camera.rotation.x)) * cos(glm::radians(camera.rotation.y));
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camFront = glm::normalize(camFront);
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glm::vec3 camRight = glm::normalize(glm::cross(camFront, glm::vec3(0.0f, 1.0f, 0.0f)));
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glm::mat4 rotM = glm::mat4(1.0f);
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glm::mat4 transM;
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rotM = glm::rotate(rotM, glm::radians(camera.rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
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rotM = glm::rotate(rotM, glm::radians(camera.rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
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rotM = glm::rotate(rotM, glm::radians(camera.rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
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// Left eye
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left = -aspectRatio * wd2 + 0.5f * eyeSeparation * ndfl;
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right = aspectRatio * wd2 + 0.5f * eyeSeparation * ndfl;
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transM = glm::translate(glm::mat4(1.0f), camera.position - camRight * (eyeSeparation / 2.0f));
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uboGS.projection[0] = glm::frustum(left, right, bottom, top, zNear, zFar);
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uboGS.modelview[0] = rotM * transM;
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// Right eye
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left = -aspectRatio * wd2 - 0.5f * eyeSeparation * ndfl;
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right = aspectRatio * wd2 - 0.5f * eyeSeparation * ndfl;
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transM = glm::translate(glm::mat4(1.0f), camera.position + camRight * (eyeSeparation / 2.0f));
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uboGS.projection[1] = glm::frustum(left, right, bottom, top, zNear, zFar);
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uboGS.modelview[1] = rotM * transM;
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memcpy(uniformBufferGS.mapped, &uboGS, sizeof(uboGS));
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}
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void draw()
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{
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VulkanExampleBase::prepareFrame();
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
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VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
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VulkanExampleBase::submitFrame();
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}
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void prepare()
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{
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VulkanExampleBase::prepare();
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loadAssets();
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prepareUniformBuffers();
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setupDescriptorSetLayout();
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preparePipelines();
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setupDescriptorPool();
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setupDescriptorSet();
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buildCommandBuffers();
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prepared = true;
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}
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virtual void render()
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{
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if (!prepared)
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return;
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draw();
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}
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virtual void viewChanged()
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{
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updateUniformBuffers();
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}
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virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
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{
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if (overlay->header("Settings")) {
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if (overlay->sliderFloat("Eye separation", &eyeSeparation, -1.0f, 1.0f)) {
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updateUniformBuffers();
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}
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}
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}
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};
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VULKAN_EXAMPLE_MAIN() |