forked from SaschaWillems/Vulkan
-
Notifications
You must be signed in to change notification settings - Fork 0
/
stencilbuffer.cpp
287 lines (238 loc) · 10.8 KB
/
stencilbuffer.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
/*
* 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 "VulkanglTFModel.h"
#include "VulkanBuffer.hpp"
#define ENABLE_VALIDATION false
class VulkanExample : public VulkanExampleBase
{
public:
vkglTF::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 = 0.025f;
} 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(0.0f, 0.0f, -2.0f));
settings.overlay = true;
}
~VulkanExample()
{
vkDestroyPipeline(device, pipelines.stencil, nullptr);
vkDestroyPipeline(device, pipelines.outline, nullptr);
vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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);
model.draw(drawCmdBuffers[i]);
// Second pass renders scaled object only where stencil was not set by first pass
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.outline);
model.draw(drawCmdBuffers[i]);
drawUI(drawCmdBuffers[i]);
vkCmdEndRenderPass(drawCmdBuffers[i]);
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
}
}
void loadAssets()
{
model.loadFromFile(getAssetPath() + "models/venus.gltf", vulkanDevice, queue, vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::FlipY);
}
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 pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass, 0);
pipelineCI.pInputAssemblyState = &inputAssemblyState;
pipelineCI.pRasterizationState = &rasterizationState;
pipelineCI.pColorBlendState = &colorBlendState;
pipelineCI.pMultisampleState = &multisampleState;
pipelineCI.pViewportState = &viewportState;
pipelineCI.pDepthStencilState = &depthStencilState;
pipelineCI.pDynamicState = &dynamicState;
pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
pipelineCI.pStages = shaderStages.data();
pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Color, vkglTF::VertexComponent::Normal });
// Toon render and stencil fill pass
shaderStages[0] = loadShader(getShadersPath() + "stencilbuffer/toon.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getShadersPath() + "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, &pipelineCI, 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(getShadersPath() + "stencilbuffer/outline.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getShadersPath() + "stencilbuffer/outline.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, 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()