339 lines
12 KiB
C++
339 lines
12 KiB
C++
/*
|
|
* Vulkan Example - Rendering outlines using the stencil buffer
|
|
*
|
|
* Copyright (C) 2016-2017 by Sascha Willems - www.saschawillems.de
|
|
*
|
|
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <vector>
|
|
|
|
#define GLM_FORCE_RADIANS
|
|
#define GLM_FORCE_DEPTH_ZERO_TO_ONE
|
|
#include <glm/glm.hpp>
|
|
#include <glm/gtc/matrix_transform.hpp>
|
|
|
|
#include <vulkan/vulkan.h>
|
|
#include "vulkanexamplebase.h"
|
|
#include "VulkanModel.hpp"
|
|
#include "VulkanBuffer.hpp"
|
|
|
|
#define ENABLE_VALIDATION false
|
|
|
|
class VulkanExample : public VulkanExampleBase
|
|
{
|
|
public:
|
|
// Vertex layout for the models
|
|
vks::VertexLayout vertexLayout = vks::VertexLayout({
|
|
vks::VERTEX_COMPONENT_POSITION,
|
|
vks::VERTEX_COMPONENT_COLOR,
|
|
vks::VERTEX_COMPONENT_NORMAL,
|
|
});
|
|
|
|
vks::Model model;
|
|
|
|
struct UBO {
|
|
glm::mat4 projection;
|
|
glm::mat4 model;
|
|
glm::vec4 lightPos = glm::vec4(0.0f, -2.0f, 1.0f, 0.0f);
|
|
// Vertex shader extrudes model by this value along normals for outlining
|
|
float outlineWidth = 0.05f;
|
|
} uboVS;
|
|
|
|
vks::Buffer uniformBufferVS;
|
|
|
|
struct {
|
|
VkPipeline stencil;
|
|
VkPipeline outline;
|
|
} pipelines;
|
|
|
|
VkPipelineLayout pipelineLayout;
|
|
VkDescriptorSet descriptorSet;
|
|
VkDescriptorSetLayout descriptorSetLayout;
|
|
|
|
VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
|
|
{
|
|
title = "Stencil buffer outlines";
|
|
timerSpeed *= 0.25f;
|
|
camera.type = Camera::CameraType::lookat;
|
|
camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 512.0f);
|
|
camera.setRotation(glm::vec3(2.5f, -35.0f, 0.0f));
|
|
camera.setTranslation(glm::vec3(0.08f, 3.6f, -8.4f));
|
|
settings.overlay = true;
|
|
}
|
|
|
|
~VulkanExample()
|
|
{
|
|
vkDestroyPipeline(device, pipelines.stencil, nullptr);
|
|
vkDestroyPipeline(device, pipelines.outline, nullptr);
|
|
|
|
vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
|
|
|
|
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
|
|
|
|
model.destroy();
|
|
uniformBufferVS.destroy();
|
|
}
|
|
|
|
void buildCommandBuffers()
|
|
{
|
|
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
|
|
|
|
VkClearValue clearValues[2];
|
|
clearValues[0].color = defaultClearColor;
|
|
clearValues[1].depthStencil = { 1.0f, 0 };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
renderPassBeginInfo.renderPass = renderPass;
|
|
renderPassBeginInfo.renderArea.offset.x = 0;
|
|
renderPassBeginInfo.renderArea.offset.y = 0;
|
|
renderPassBeginInfo.renderArea.extent.width = width;
|
|
renderPassBeginInfo.renderArea.extent.height = height;
|
|
renderPassBeginInfo.clearValueCount = 2;
|
|
renderPassBeginInfo.pClearValues = clearValues;
|
|
|
|
for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
|
|
{
|
|
renderPassBeginInfo.framebuffer = frameBuffers[i];
|
|
|
|
VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
|
|
|
|
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
|
|
VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
VkDeviceSize offsets[1] = { 0 };
|
|
|
|
vkCmdBindVertexBuffers(drawCmdBuffers[i], 0, 1, &model.vertices.buffer, offsets);
|
|
vkCmdBindIndexBuffer(drawCmdBuffers[i], model.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
|
|
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
|
|
|
|
// First pass renders object (toon shaded) and fills stencil buffer
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.stencil);
|
|
vkCmdDrawIndexed(drawCmdBuffers[i], model.indexCount, 1, 0, 0, 0);
|
|
|
|
// Second pass renders scaled object only where stencil was not set by first pass
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.outline);
|
|
vkCmdDrawIndexed(drawCmdBuffers[i], model.indexCount, 1, 0, 0, 0);
|
|
|
|
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
|
|
|
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
|
|
}
|
|
}
|
|
|
|
void loadAssets()
|
|
{
|
|
model.loadFromFile(getAssetPath() + "models/venus.fbx", vertexLayout, 0.3f, vulkanDevice, queue);
|
|
}
|
|
|
|
void setupDescriptorPool()
|
|
{
|
|
std::vector<VkDescriptorPoolSize> poolSizes = {
|
|
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
|
|
};
|
|
VkDescriptorPoolCreateInfo descriptorPoolInfo =
|
|
vks::initializers::descriptorPoolCreateInfo(static_cast<uint32_t>(poolSizes.size()), poolSizes.data(), 1);
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
|
|
}
|
|
|
|
void setupDescriptorSetLayout()
|
|
{
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0)
|
|
};
|
|
|
|
VkDescriptorSetLayoutCreateInfo descriptorLayoutInfo =
|
|
vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings.data(), 1);
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayoutInfo, nullptr, &descriptorSetLayout));
|
|
|
|
VkPipelineLayoutCreateInfo pipelineLayoutInfo =
|
|
vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutInfo, nullptr, &pipelineLayout));
|
|
}
|
|
|
|
void setupDescriptorSet()
|
|
{
|
|
VkDescriptorSetAllocateInfo allocInfo =
|
|
vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
|
|
std::vector<VkWriteDescriptorSet> modelWriteDescriptorSets = {
|
|
vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBufferVS.descriptor)
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(modelWriteDescriptorSets.size()), modelWriteDescriptorSets.data(), 0, NULL);
|
|
}
|
|
|
|
void preparePipelines()
|
|
{
|
|
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
|
|
vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
|
|
|
|
VkPipelineRasterizationStateCreateInfo rasterizationState =
|
|
vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_FRONT_BIT, VK_FRONT_FACE_CLOCKWISE, 0);
|
|
|
|
VkPipelineColorBlendAttachmentState blendAttachmentState =
|
|
vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
|
|
|
|
VkPipelineColorBlendStateCreateInfo colorBlendState =
|
|
vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
|
|
|
|
VkPipelineDepthStencilStateCreateInfo depthStencilState =
|
|
vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
|
|
|
|
VkPipelineViewportStateCreateInfo viewportState =
|
|
vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
|
|
|
|
VkPipelineMultisampleStateCreateInfo multisampleState =
|
|
vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
|
|
|
|
std::vector<VkDynamicState> dynamicStateEnables = {
|
|
VK_DYNAMIC_STATE_VIEWPORT,
|
|
VK_DYNAMIC_STATE_SCISSOR
|
|
};
|
|
VkPipelineDynamicStateCreateInfo dynamicState =
|
|
vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
|
|
|
|
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCreateInfo =
|
|
vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass, 0);
|
|
|
|
// Vertex bindings an attributes
|
|
std::vector<VkVertexInputBindingDescription> vertexInputBindings = {
|
|
vks::initializers::vertexInputBindingDescription(0, vertexLayout.stride(), VK_VERTEX_INPUT_RATE_VERTEX),
|
|
};
|
|
std::vector<VkVertexInputAttributeDescription> vertexInputAttributes = {
|
|
vks::initializers::vertexInputAttributeDescription(0, 0, VK_FORMAT_R32G32B32_SFLOAT, 0), // Location 0: Position
|
|
vks::initializers::vertexInputAttributeDescription(0, 1, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 3), // Location 1: Color
|
|
vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 6) // Location 2: Normal
|
|
};
|
|
|
|
VkPipelineVertexInputStateCreateInfo vertexInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
|
|
vertexInputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertexInputBindings.size());
|
|
vertexInputState.pVertexBindingDescriptions = vertexInputBindings.data();
|
|
vertexInputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertexInputAttributes.size());
|
|
vertexInputState.pVertexAttributeDescriptions = vertexInputAttributes.data();
|
|
|
|
pipelineCreateInfo.pVertexInputState = &vertexInputState;
|
|
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCreateInfo.pRasterizationState = &rasterizationState;
|
|
pipelineCreateInfo.pColorBlendState = &colorBlendState;
|
|
pipelineCreateInfo.pMultisampleState = &multisampleState;
|
|
pipelineCreateInfo.pViewportState = &viewportState;
|
|
pipelineCreateInfo.pDepthStencilState = &depthStencilState;
|
|
pipelineCreateInfo.pDynamicState = &dynamicState;
|
|
pipelineCreateInfo.stageCount = static_cast<uint32_t>(shaderStages.size());
|
|
pipelineCreateInfo.pStages = shaderStages.data();
|
|
|
|
// Toon render and stencil fill pass
|
|
shaderStages[0] = loadShader(getAssetPath() + "shaders/stencilbuffer/toon.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getAssetPath() + "shaders/stencilbuffer/toon.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
|
|
rasterizationState.cullMode = VK_CULL_MODE_NONE;
|
|
|
|
depthStencilState.stencilTestEnable = VK_TRUE;
|
|
|
|
depthStencilState.back.compareOp = VK_COMPARE_OP_ALWAYS;
|
|
depthStencilState.back.failOp = VK_STENCIL_OP_REPLACE;
|
|
depthStencilState.back.depthFailOp = VK_STENCIL_OP_REPLACE;
|
|
depthStencilState.back.passOp = VK_STENCIL_OP_REPLACE;
|
|
depthStencilState.back.compareMask = 0xff;
|
|
depthStencilState.back.writeMask = 0xff;
|
|
depthStencilState.back.reference = 1;
|
|
depthStencilState.front = depthStencilState.back;
|
|
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.stencil));
|
|
|
|
// Outline pass
|
|
depthStencilState.back.compareOp = VK_COMPARE_OP_NOT_EQUAL;
|
|
depthStencilState.back.failOp = VK_STENCIL_OP_KEEP;
|
|
depthStencilState.back.depthFailOp = VK_STENCIL_OP_KEEP;
|
|
depthStencilState.back.passOp = VK_STENCIL_OP_REPLACE;
|
|
depthStencilState.front = depthStencilState.back;
|
|
depthStencilState.depthTestEnable = VK_FALSE;
|
|
|
|
shaderStages[0] = loadShader(getAssetPath() + "shaders/stencilbuffer/outline.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getAssetPath() + "shaders/stencilbuffer/outline.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.outline));
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Mesh vertex shader uniform buffer block
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBufferVS,
|
|
sizeof(uboVS)));
|
|
|
|
// Map persistent
|
|
VK_CHECK_RESULT(uniformBufferVS.map());
|
|
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
uboVS.projection = camera.matrices.perspective;
|
|
uboVS.model = camera.matrices.view;
|
|
memcpy(uniformBufferVS.mapped, &uboVS, sizeof(uboVS));
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
VulkanExampleBase::prepareFrame();
|
|
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
loadAssets();
|
|
prepareUniformBuffers();
|
|
setupDescriptorSetLayout();
|
|
preparePipelines();
|
|
setupDescriptorPool();
|
|
setupDescriptorSet();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
draw();
|
|
}
|
|
|
|
virtual void viewChanged()
|
|
{
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
|
{
|
|
if (overlay->header("Settings")) {
|
|
if (overlay->inputFloat("Outline width", &uboVS.outlineWidth, 0.05f, 2)) {
|
|
updateUniformBuffers();
|
|
}
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|