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procedural-3d-engine/examples/texturemipmapgen/texturemipmapgen.cpp
Sascha Willems 91ab6a517f Code cleanup
2024-01-21 13:15:56 +01:00

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/*
* Vulkan Example - Runtime mip map generation
*
* This samples shows how to generate a full mip-chain from a top-level image and how different sampling modes compare
*
* Copyright (C) 2016-2023 by Sascha Willems - www.saschawillems.de
*
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/
#include "vulkanexamplebase.h"
#include "VulkanglTFModel.h"
#include <ktx.h>
#include <ktxvulkan.h>
class VulkanExample : public VulkanExampleBase
{
public:
struct Texture {
VkImage image{ VK_NULL_HANDLE };
VkDeviceMemory deviceMemory{ VK_NULL_HANDLE };
VkImageView view{ VK_NULL_HANDLE };
uint32_t width{ 0 };
uint32_t height{ 0 };
uint32_t mipLevels{ 0 };
} texture;
// To demonstrate mip mapping and filtering this example uses separate samplers
std::vector<std::string> samplerNames{ "No mip maps" , "Mip maps (bilinear)" , "Mip maps (anisotropic)" };
std::vector<VkSampler> samplers{};
vkglTF::Model model;
struct UniformData {
glm::mat4 projection;
glm::mat4 view;
glm::mat4 model;
glm::vec4 viewPos;
float lodBias = 0.0f;
int32_t samplerIndex = 2;
} uniformData;
vks::Buffer uniformBuffer;
VkPipeline pipeline{ VK_NULL_HANDLE };
VkPipelineLayout pipelineLayout{ VK_NULL_HANDLE };
VkDescriptorSet descriptorSet{ VK_NULL_HANDLE };
VkDescriptorSetLayout descriptorSetLayout{ VK_NULL_HANDLE };
VulkanExample() : VulkanExampleBase()
{
title = "Runtime mip map generation";
camera.type = Camera::CameraType::firstperson;
camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 1024.0f);
camera.setRotation(glm::vec3(0.0f, 90.0f, 0.0f));
camera.setTranslation(glm::vec3(40.75f, 0.0f, 0.0f));
camera.movementSpeed = 2.5f;
camera.rotationSpeed = 0.5f;
timerSpeed *= 0.05f;
}
~VulkanExample()
{
if (device) {
destroyTextureImage(texture);
vkDestroyPipeline(device, pipeline, nullptr);
vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
uniformBuffer.destroy();
for (auto sampler : samplers) {
vkDestroySampler(device, sampler, nullptr);
}
}
}
virtual void getEnabledFeatures()
{
if (deviceFeatures.samplerAnisotropy) {
enabledFeatures.samplerAnisotropy = VK_TRUE;
}
}
// Loads a full sized image from disk, generates a Vulkan image (texture) from it and creates a full mip chain using blits
void loadTextureAndGenerateMips(std::string filename, VkFormat format)
{
ktxResult result;
ktxTexture* ktxTexture;
#if defined(__ANDROID__)
// Textures are stored inside the apk on Android (compressed)
// So they need to be loaded via the asset manager
AAsset* asset = AAssetManager_open(androidApp->activity->assetManager, filename.c_str(), AASSET_MODE_STREAMING);
if (!asset) {
vks::tools::exitFatal("Could not load texture from " + filename + "\n\nMake sure the assets submodule has been checked out and is up-to-date.", -1);
}
size_t size = AAsset_getLength(asset);
assert(size > 0);
ktx_uint8_t *textureData = new ktx_uint8_t[size];
AAsset_read(asset, textureData, size);
AAsset_close(asset);
result = ktxTexture_CreateFromMemory(textureData, size, KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT, &ktxTexture);
delete[] textureData;
#else
if (!vks::tools::fileExists(filename)) {
vks::tools::exitFatal("Could not load texture from " + filename + "\n\nMake sure the assets submodule has been checked out and is up-to-date.", -1);
}
result = ktxTexture_CreateFromNamedFile(filename.c_str(), KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT, &ktxTexture);
#endif
assert(result == KTX_SUCCESS);
texture.width = ktxTexture->baseWidth;
texture.height = ktxTexture->baseHeight;
ktx_uint8_t *ktxTextureData = ktxTexture_GetData(ktxTexture);
ktx_size_t ktxTextureSize = ktxTexture_GetImageSize(ktxTexture, 0);
// calculate num of mip maps
// numLevels = 1 + floor(log2(max(w, h, d)))
// Calculated as log2(max(width, height, depth))c + 1 (see specs)
texture.mipLevels = static_cast<uint32_t>(floor(log2(std::max(texture.width, texture.height))) + 1);
// Get device properties for the requested texture format
VkFormatProperties formatProperties;
vkGetPhysicalDeviceFormatProperties(physicalDevice, format, &formatProperties);
// Mip-chain generation requires support for blit source and destination
assert(formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_BLIT_SRC_BIT);
assert(formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_BLIT_DST_BIT);
VkMemoryAllocateInfo memAllocInfo = vks::initializers::memoryAllocateInfo();
VkMemoryRequirements memReqs = {};
// Create a host-visible staging buffer that contains the raw image data
VkBuffer stagingBuffer;
VkDeviceMemory stagingMemory;
VkBufferCreateInfo bufferCreateInfo = vks::initializers::bufferCreateInfo();
bufferCreateInfo.size = ktxTextureSize;
// This buffer is used as a transfer source for the buffer copy
bufferCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
bufferCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
VK_CHECK_RESULT(vkCreateBuffer(device, &bufferCreateInfo, nullptr, &stagingBuffer));
vkGetBufferMemoryRequirements(device, stagingBuffer, &memReqs);
memAllocInfo.allocationSize = memReqs.size;
memAllocInfo.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAllocInfo, nullptr, &stagingMemory));
VK_CHECK_RESULT(vkBindBufferMemory(device, stagingBuffer, stagingMemory, 0));
// Copy texture data into staging buffer
uint8_t *data;
VK_CHECK_RESULT(vkMapMemory(device, stagingMemory, 0, memReqs.size, 0, (void **)&data));
memcpy(data, ktxTextureData, ktxTextureSize);
vkUnmapMemory(device, stagingMemory);
// Create optimal tiled target image
VkImageCreateInfo imageCreateInfo = vks::initializers::imageCreateInfo();
imageCreateInfo.imageType = VK_IMAGE_TYPE_2D;
imageCreateInfo.format = format;
imageCreateInfo.mipLevels = texture.mipLevels;
imageCreateInfo.arrayLayers = 1;
imageCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
imageCreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
imageCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
imageCreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
imageCreateInfo.extent = { texture.width, texture.height, 1 };
imageCreateInfo.usage = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
VK_CHECK_RESULT(vkCreateImage(device, &imageCreateInfo, nullptr, &texture.image));
vkGetImageMemoryRequirements(device, texture.image, &memReqs);
memAllocInfo.allocationSize = memReqs.size;
memAllocInfo.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
VK_CHECK_RESULT(vkAllocateMemory(device, &memAllocInfo, nullptr, &texture.deviceMemory));
VK_CHECK_RESULT(vkBindImageMemory(device, texture.image, texture.deviceMemory, 0));
VkCommandBuffer copyCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
VkImageSubresourceRange subresourceRange = {};
subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
subresourceRange.levelCount = 1;
subresourceRange.layerCount = 1;
// Optimal image will be used as destination for the copy, so we must transfer from our initial undefined image layout to the transfer destination layout
vks::tools::insertImageMemoryBarrier(
copyCmd,
texture.image,
0,
VK_ACCESS_TRANSFER_WRITE_BIT,
VK_IMAGE_LAYOUT_UNDEFINED,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_TRANSFER_BIT,
subresourceRange);
// Copy the first mip of the chain, remaining mips will be generated
VkBufferImageCopy bufferCopyRegion = {};
bufferCopyRegion.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
bufferCopyRegion.imageSubresource.mipLevel = 0;
bufferCopyRegion.imageSubresource.baseArrayLayer = 0;
bufferCopyRegion.imageSubresource.layerCount = 1;
bufferCopyRegion.imageExtent.width = texture.width;
bufferCopyRegion.imageExtent.height = texture.height;
bufferCopyRegion.imageExtent.depth = 1;
vkCmdCopyBufferToImage(copyCmd, stagingBuffer, texture.image, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &bufferCopyRegion);
// Transition first mip level to transfer source for read during blit
vks::tools::insertImageMemoryBarrier(
copyCmd,
texture.image,
VK_ACCESS_TRANSFER_WRITE_BIT,
VK_ACCESS_TRANSFER_READ_BIT,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_TRANSFER_BIT,
subresourceRange);
vulkanDevice->flushCommandBuffer(copyCmd, queue, true);
// Clean up staging resources
vkFreeMemory(device, stagingMemory, nullptr);
vkDestroyBuffer(device, stagingBuffer, nullptr);
ktxTexture_Destroy(ktxTexture);
// Generate the mip chain
// ---------------------------------------------------------------
// We copy down the whole mip chain doing a blit from mip-1 to mip
// An alternative way would be to always blit from the first mip level and sample that one down
VkCommandBuffer blitCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
// Copy down mips from n-1 to n
for (uint32_t i = 1; i < texture.mipLevels; i++)
{
VkImageBlit imageBlit{};
// Source
imageBlit.srcSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
imageBlit.srcSubresource.layerCount = 1;
imageBlit.srcSubresource.mipLevel = i-1;
imageBlit.srcOffsets[1].x = int32_t(texture.width >> (i - 1));
imageBlit.srcOffsets[1].y = int32_t(texture.height >> (i - 1));
imageBlit.srcOffsets[1].z = 1;
// Destination
imageBlit.dstSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
imageBlit.dstSubresource.layerCount = 1;
imageBlit.dstSubresource.mipLevel = i;
imageBlit.dstOffsets[1].x = int32_t(texture.width >> i);
imageBlit.dstOffsets[1].y = int32_t(texture.height >> i);
imageBlit.dstOffsets[1].z = 1;
VkImageSubresourceRange mipSubRange = {};
mipSubRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
mipSubRange.baseMipLevel = i;
mipSubRange.levelCount = 1;
mipSubRange.layerCount = 1;
// Prepare current mip level as image blit destination
vks::tools::insertImageMemoryBarrier(
blitCmd,
texture.image,
0,
VK_ACCESS_TRANSFER_WRITE_BIT,
VK_IMAGE_LAYOUT_UNDEFINED,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_TRANSFER_BIT,
mipSubRange);
// Blit from previous level
vkCmdBlitImage(
blitCmd,
texture.image,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
texture.image,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
1,
&imageBlit,
VK_FILTER_LINEAR);
// Prepare current mip level as image blit source for next level
vks::tools::insertImageMemoryBarrier(
blitCmd,
texture.image,
VK_ACCESS_TRANSFER_WRITE_BIT,
VK_ACCESS_TRANSFER_READ_BIT,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_TRANSFER_BIT,
mipSubRange);
}
// After the loop, all mip layers are in TRANSFER_SRC layout, so transition all to SHADER_READ
subresourceRange.levelCount = texture.mipLevels;
vks::tools::insertImageMemoryBarrier(
blitCmd,
texture.image,
VK_ACCESS_TRANSFER_READ_BIT,
VK_ACCESS_SHADER_READ_BIT,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
VK_PIPELINE_STAGE_TRANSFER_BIT,
VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT,
subresourceRange);
vulkanDevice->flushCommandBuffer(blitCmd, queue, true);
// ---------------------------------------------------------------
// Create some samplers with different settings that can be selected via the UI
samplers.resize(3);
VkSamplerCreateInfo sampler = vks::initializers::samplerCreateInfo();
sampler.magFilter = VK_FILTER_LINEAR;
sampler.minFilter = VK_FILTER_LINEAR;
sampler.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
sampler.addressModeU = VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT;
sampler.addressModeV = VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT;
sampler.addressModeW = VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT;
sampler.mipLodBias = 0.0f;
sampler.compareOp = VK_COMPARE_OP_NEVER;
sampler.minLod = 0.0f;
sampler.maxLod = 0.0f;
sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
sampler.maxAnisotropy = 1.0;
sampler.anisotropyEnable = VK_FALSE;
// Without mip mapping
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &samplers[0]));
// With mip mapping
sampler.maxLod = (float)texture.mipLevels;
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &samplers[1]));
// With mip mapping and anisotropic filtering
if (vulkanDevice->features.samplerAnisotropy)
{
sampler.maxAnisotropy = vulkanDevice->properties.limits.maxSamplerAnisotropy;
sampler.anisotropyEnable = VK_TRUE;
}
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &samplers[2]));
// Create image view
VkImageViewCreateInfo view = vks::initializers::imageViewCreateInfo();
view.image = texture.image;
view.viewType = VK_IMAGE_VIEW_TYPE_2D;
view.format = format;
view.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
view.subresourceRange.baseMipLevel = 0;
view.subresourceRange.baseArrayLayer = 0;
view.subresourceRange.layerCount = 1;
view.subresourceRange.levelCount = texture.mipLevels;
VK_CHECK_RESULT(vkCreateImageView(device, &view, nullptr, &texture.view));
}
// Free all Vulkan resources used a texture object
void destroyTextureImage(Texture texture)
{
vkDestroyImageView(device, texture.view, nullptr);
vkDestroyImage(device, texture.image, nullptr);
vkFreeMemory(device, texture.deviceMemory, nullptr);
}
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);
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, NULL);
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
model.draw(drawCmdBuffers[i]);
drawUI(drawCmdBuffers[i]);
vkCmdEndRenderPass(drawCmdBuffers[i]);
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
}
}
void loadAssets()
{
model.loadFromFile(getAssetPath() + "models/tunnel_cylinder.gltf", vulkanDevice, queue, vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::FlipY);
loadTextureAndGenerateMips(getAssetPath() + "textures/metalplate_nomips_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM);
}
void setupDescriptors()
{
// Pool
std::vector<VkDescriptorPoolSize> poolSizes = {
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1),
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_SAMPLER, 3),
};
VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 1);
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
// Layout
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
// Binding 0: Vertex shader uniform buffer
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0),
// Binding 1: Sampled image
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, VK_SHADER_STAGE_FRAGMENT_BIT, 1),
// Binding 2: Array with 3 samplers
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 2, 3),
};
VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
// Sets
VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
VkDescriptorImageInfo textureDescriptor = vks::initializers::descriptorImageInfo(VK_NULL_HANDLE, texture.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
// Binding 0: Vertex shader uniform buffer
vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffer.descriptor),
// Binding 1: Sampled image
vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1, &textureDescriptor)
};
// Binding 2: Contains an array of samplers that can be switched from the UI to demonstrate different filteirng modes
std::vector<VkDescriptorImageInfo> samplerDescriptors;
for (auto i = 0; i < samplers.size(); i++) {
samplerDescriptors.push_back(vks::initializers::descriptorImageInfo(samplers[i], VK_NULL_HANDLE, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL));
}
VkWriteDescriptorSet samplerDescriptorWrite{};
samplerDescriptorWrite.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
samplerDescriptorWrite.dstSet = descriptorSet;
samplerDescriptorWrite.descriptorType = VK_DESCRIPTOR_TYPE_SAMPLER;
samplerDescriptorWrite.descriptorCount = static_cast<uint32_t>(samplerDescriptors.size());
samplerDescriptorWrite.pImageInfo = samplerDescriptors.data();
samplerDescriptorWrite.dstBinding = 2;
samplerDescriptorWrite.dstArrayElement = 0;
writeDescriptorSets.push_back(samplerDescriptorWrite);
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);
}
void preparePipelines()
{
// Layout
VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayout));
// Pipeline
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_BACK_BIT, VK_FRONT_FACE_COUNTER_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;
shaderStages[0] = loadShader(getShadersPath() + "texturemipmapgen/texture.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getShadersPath() + "texturemipmapgen/texture.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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::UV, vkglTF::VertexComponent::Normal });
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
}
// Prepare and initialize uniform buffer containing shader uniforms
void prepareUniformBuffers()
{
VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffer, sizeof(UniformData), &uniformData));
VK_CHECK_RESULT(uniformBuffer.map());
}
void updateUniformBuffers()
{
uniformData.projection = camera.matrices.perspective;
uniformData.view = camera.matrices.view;
// @todo: paused
uniformData.model = glm::rotate(glm::mat4(1.0f), glm::radians(timer * 360.0f), glm::vec3(1.0f, 0.0f, 0.0f));
uniformData.viewPos = glm::vec4(camera.position, 0.0f) * glm::vec4(-1.0f);
memcpy(uniformBuffer.mapped, &uniformData, sizeof(uniformData));
}
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();
setupDescriptors();
preparePipelines();
buildCommandBuffers();
prepared = true;
}
virtual void render()
{
if (!prepared)
return;
updateUniformBuffers();
draw();
}
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
{
if (overlay->header("Settings")) {
if (overlay->sliderFloat("LOD bias", &uniformData.lodBias, 0.0f, (float)texture.mipLevels)) {
updateUniformBuffers();
}
if (overlay->comboBox("Sampler type", &uniformData.samplerIndex, samplerNames)) {
updateUniformBuffers();
}
}
}
};
VULKAN_EXAMPLE_MAIN()
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