xsl/Vulkan-Samples
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

init

Browse Source
This commit is contained in:
xsl
2025-09-04 10:54:47 +08:00
commit 6bc8f61b18
1808 changed files with 208268 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
samples/api/texture_mipmap_generation/texture_mipmap_generation.cpp
+632
View File
@@ -0,0 +1,632 @@
/* Copyright (c) 2019-2025, Sascha Willems
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 the "License";
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Runtime mip map generation
*/
#include "texture_mipmap_generation.h"
TextureMipMapGeneration::TextureMipMapGeneration()
{
zoom = -2.5f;
rotation = {0.0f, 15.0f, 0.0f};
title = "Texture MipMap generation";
}
TextureMipMapGeneration::~TextureMipMapGeneration()
{
if (has_device())
{
vkDestroyPipeline(get_device().get_handle(), pipeline, nullptr);
vkDestroyPipelineLayout(get_device().get_handle(), pipeline_layout, nullptr);
vkDestroyDescriptorSetLayout(get_device().get_handle(), descriptor_set_layout, nullptr);
for (auto sampler : samplers)
{
vkDestroySampler(get_device().get_handle(), sampler, nullptr);
}
}
destroy_texture(texture);
uniform_buffer.reset();
}
// Enable physical device features required for this example
void TextureMipMapGeneration::request_gpu_features(vkb::PhysicalDevice &gpu)
{
// Enable anisotropic filtering if supported
if (gpu.get_features().samplerAnisotropy)
{
gpu.get_mutable_requested_features().samplerAnisotropy = VK_TRUE;
}
}
/*
Load the base texture containing only the first mip level and generate the whole mip-chain at runtime
*/
void TextureMipMapGeneration::load_texture_generate_mipmaps(std::string file_name)
{
// ktx1 doesn't know whether the content is sRGB or linear, but most tools save in sRGB, so assume that.
VkFormat format = VK_FORMAT_R8G8B8A8_SRGB;
ktxTexture *ktx_texture;
KTX_error_code result;
result = ktxTexture_CreateFromNamedFile(file_name.c_str(), KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT, &ktx_texture);
// @todo: get format from libktx
if (ktx_texture == nullptr)
{
throw std::runtime_error("Couldn't load texture");
}
texture.width = ktx_texture->baseWidth;
texture.height = ktx_texture->baseHeight;
// Calculate number of mip levels as per Vulkan specs:
// numLevels = 1 + floor(log2(max(w, h, d)))
texture.mip_levels = static_cast<uint32_t>(floor(log2(std::max(texture.width, texture.height))) + 1);
// Get device properties for the requested texture format
// Check if the selected format supports blit source and destination, which is required for generating the mip levels
// If this is not supported you could implement a fallback via compute shader image writes and stores
VkFormatProperties formatProperties;
vkGetPhysicalDeviceFormatProperties(get_device().get_gpu().get_handle(), format, &formatProperties);
if (!(formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_BLIT_SRC_BIT) || !(formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_BLIT_DST_BIT))
{
throw std::runtime_error("Selected image format does not support blit source and destination");
}
VkMemoryAllocateInfo memory_allocate_info = vkb::initializers::memory_allocate_info();
VkMemoryRequirements memory_requirements = {};
ktx_uint8_t *ktx_image_data = ktx_texture->pData;
ktx_size_t ktx_texture_size = ktx_texture->dataSize;
// Create a host-visible staging buffer that contains the raw image data
VkBuffer staging_buffer;
VkDeviceMemory staging_memory;
VkBufferCreateInfo buffer_create_info = vkb::initializers::buffer_create_info();
buffer_create_info.size = ktx_texture_size;
// This buffer is used as a transfer source for the buffer copy
buffer_create_info.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
buffer_create_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
VK_CHECK(vkCreateBuffer(get_device().get_handle(), &buffer_create_info, nullptr, &staging_buffer));
// Get memory requirements for the staging buffer (alignment, memory type bits)
vkGetBufferMemoryRequirements(get_device().get_handle(), staging_buffer, &memory_requirements);
memory_allocate_info.allocationSize = memory_requirements.size;
// Get memory type index for a host visible buffer
memory_allocate_info.memoryTypeIndex =
get_device().get_gpu().get_memory_type(memory_requirements.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
VK_CHECK(vkAllocateMemory(get_device().get_handle(), &memory_allocate_info, nullptr, &staging_memory));
VK_CHECK(vkBindBufferMemory(get_device().get_handle(), staging_buffer, staging_memory, 0));
// Copy ktx image data into host local staging buffer
uint8_t *data;
VK_CHECK(vkMapMemory(get_device().get_handle(), staging_memory, 0, memory_requirements.size, 0, (void **) &data));
memcpy(data, ktx_image_data, ktx_texture_size);
vkUnmapMemory(get_device().get_handle(), staging_memory);
// now, the ktx_texture can be destroyed
ktxTexture_Destroy(ktx_texture);
// Create optimal tiled target image on the device
VkImageCreateInfo image_create_info = vkb::initializers::image_create_info();
image_create_info.imageType = VK_IMAGE_TYPE_2D;
image_create_info.format = format;
image_create_info.mipLevels = texture.mip_levels;
image_create_info.arrayLayers = 1;
image_create_info.samples = VK_SAMPLE_COUNT_1_BIT;
image_create_info.tiling = VK_IMAGE_TILING_OPTIMAL;
image_create_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
image_create_info.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
image_create_info.extent = {texture.width, texture.height, 1};
image_create_info.usage = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
VK_CHECK(vkCreateImage(get_device().get_handle(), &image_create_info, nullptr, &texture.image));
vkGetImageMemoryRequirements(get_device().get_handle(), texture.image, &memory_requirements);
memory_allocate_info.allocationSize = memory_requirements.size;
memory_allocate_info.memoryTypeIndex = get_device().get_gpu().get_memory_type(memory_requirements.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
VK_CHECK(vkAllocateMemory(get_device().get_handle(), &memory_allocate_info, nullptr, &texture.device_memory));
VK_CHECK(vkBindImageMemory(get_device().get_handle(), texture.image, texture.device_memory, 0));
VkCommandBuffer copy_command = get_device().create_command_buffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
// 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
vkb::image_layout_transition(copy_command, texture.image, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
// Copy the first mip of the chain, remaining mips will be generated
VkBufferImageCopy buffer_copy_region = {};
buffer_copy_region.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
buffer_copy_region.imageSubresource.mipLevel = 0;
buffer_copy_region.imageSubresource.baseArrayLayer = 0;
buffer_copy_region.imageSubresource.layerCount = 1;
buffer_copy_region.imageExtent.width = texture.width;
buffer_copy_region.imageExtent.height = texture.height;
buffer_copy_region.imageExtent.depth = 1;
vkCmdCopyBufferToImage(copy_command, staging_buffer, texture.image, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &buffer_copy_region);
// Transition first mip level to transfer source so we can blit(read) from it
vkb::image_layout_transition(copy_command, texture.image, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
get_device().flush_command_buffer(copy_command, queue, true);
// Clean up staging resources
vkDestroyBuffer(get_device().get_handle(), staging_buffer, nullptr);
vkFreeMemory(get_device().get_handle(), staging_memory, nullptr);
// 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 blit_command = get_device().create_command_buffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
// Copy down mips from n-1 to n
for (uint32_t i = 1; i < texture.mip_levels; i++)
{
VkImageBlit image_blit{};
// Source
image_blit.srcSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
image_blit.srcSubresource.layerCount = 1;
image_blit.srcSubresource.mipLevel = i - 1;
image_blit.srcOffsets[1].x = static_cast<int32_t>(texture.width >> (i - 1));
image_blit.srcOffsets[1].y = static_cast<int32_t>(texture.height >> (i - 1));
image_blit.srcOffsets[1].z = 1;
// Destination
image_blit.dstSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
image_blit.dstSubresource.layerCount = 1;
image_blit.dstSubresource.mipLevel = i;
image_blit.dstOffsets[1].x = static_cast<int32_t>(texture.width >> i);
image_blit.dstOffsets[1].y = static_cast<int32_t>(texture.height >> i);
image_blit.dstOffsets[1].z = 1;
// Prepare current mip level as image blit destination
vkb::image_layout_transition(blit_command,
texture.image,
VK_IMAGE_LAYOUT_UNDEFINED,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
{VK_IMAGE_ASPECT_COLOR_BIT, i, 1, 0, 1});
// Blit from previous level
vkCmdBlitImage(
blit_command,
texture.image,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
texture.image,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
1,
&image_blit,
VK_FILTER_LINEAR);
// Prepare current mip level as image blit source for next level
vkb::image_layout_transition(blit_command,
texture.image,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
{VK_IMAGE_ASPECT_COLOR_BIT, i, 1, 0, 1});
}
// After the loop, all mip layers are in TRANSFER_SRC layout, so transition all to SHADER_READ
vkb::image_layout_transition(blit_command,
texture.image,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
{VK_IMAGE_ASPECT_COLOR_BIT, 0, texture.mip_levels, 0, 1});
get_device().flush_command_buffer(blit_command, queue, true);
// ---------------------------------------------------------------
// Calculate valid filter and mipmap modes
VkFilter filter = VK_FILTER_LINEAR;
VkSamplerMipmapMode mipmap_mode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
vkb::make_filters_valid(get_device().get_gpu().get_handle(), format, &filter, &mipmap_mode);
// Create samplers for different mip map demonstration cases
samplers.resize(3);
VkSamplerCreateInfo sampler = vkb::initializers::sampler_create_info();
sampler.magFilter = filter;
sampler.minFilter = filter;
sampler.mipmapMode = mipmap_mode;
sampler.addressModeU = VK_SAMPLER_ADDRESS_MODE_REPEAT;
sampler.addressModeV = VK_SAMPLER_ADDRESS_MODE_REPEAT;
sampler.addressModeW = VK_SAMPLER_ADDRESS_MODE_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(vkCreateSampler(get_device().get_handle(), &sampler, nullptr, &samplers[0]));
// With mip mapping
sampler.maxLod = static_cast<float>(texture.mip_levels);
VK_CHECK(vkCreateSampler(get_device().get_handle(), &sampler, nullptr, &samplers[1]));
// With mip mapping and anisotropic filtering (when supported)
if (get_device().get_gpu().get_features().samplerAnisotropy)
{
sampler.maxAnisotropy = get_device().get_gpu().get_properties().limits.maxSamplerAnisotropy;
sampler.anisotropyEnable = VK_TRUE;
}
VK_CHECK(vkCreateSampler(get_device().get_handle(), &sampler, nullptr, &samplers[2]));
// Create image view
VkImageViewCreateInfo view = vkb::initializers::image_view_create_info();
view.image = texture.image;
view.viewType = VK_IMAGE_VIEW_TYPE_2D;
view.format = format;
view.components = {VK_COMPONENT_SWIZZLE_R, VK_COMPONENT_SWIZZLE_G, VK_COMPONENT_SWIZZLE_B, VK_COMPONENT_SWIZZLE_A};
view.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
view.subresourceRange.baseMipLevel = 0;
view.subresourceRange.baseArrayLayer = 0;
view.subresourceRange.layerCount = 1;
view.subresourceRange.levelCount = texture.mip_levels;
VK_CHECK(vkCreateImageView(get_device().get_handle(), &view, nullptr, &texture.view));
}
// Free all Vulkan resources used by a texture object
void TextureMipMapGeneration::destroy_texture(Texture texture)
{
vkDestroyImageView(get_device().get_handle(), texture.view, nullptr);
vkDestroyImage(get_device().get_handle(), texture.image, nullptr);
vkFreeMemory(get_device().get_handle(), texture.device_memory, nullptr);
}
void TextureMipMapGeneration::load_assets()
{
load_texture_generate_mipmaps(vkb::fs::path::get(vkb::fs::path::Assets, "textures/checkerboard_rgba.ktx"));
scene = load_model("scenes/tunnel_cylinder.gltf");
}
void TextureMipMapGeneration::build_command_buffers()
{
VkCommandBufferBeginInfo command_buffer_begin_info = vkb::initializers::command_buffer_begin_info();
VkClearValue clear_values[2];
clear_values[0].color = default_clear_color;
clear_values[1].depthStencil = {1.0f, 0};
VkRenderPassBeginInfo render_pass_begin_info = vkb::initializers::render_pass_begin_info();
render_pass_begin_info.renderPass = render_pass;
render_pass_begin_info.renderArea.offset.x = 0;
render_pass_begin_info.renderArea.offset.y = 0;
render_pass_begin_info.renderArea.extent.width = width;
render_pass_begin_info.renderArea.extent.height = height;
render_pass_begin_info.clearValueCount = 2;
render_pass_begin_info.pClearValues = clear_values;
for (int32_t i = 0; i < draw_cmd_buffers.size(); ++i)
{
render_pass_begin_info.framebuffer = framebuffers[i];
VK_CHECK(vkBeginCommandBuffer(draw_cmd_buffers[i], &command_buffer_begin_info));
vkCmdBeginRenderPass(draw_cmd_buffers[i], &render_pass_begin_info, VK_SUBPASS_CONTENTS_INLINE);
VkViewport viewport = vkb::initializers::viewport(static_cast<float>(width), static_cast<float>(height), 0.0f, 1.0f);
vkCmdSetViewport(draw_cmd_buffers[i], 0, 1, &viewport);
VkRect2D scissor = vkb::initializers::rect2D(width, height, 0, 0);
vkCmdSetScissor(draw_cmd_buffers[i], 0, 1, &scissor);
vkCmdBindDescriptorSets(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline_layout, 0, 1, &descriptor_set, 0, NULL);
vkCmdBindPipeline(draw_cmd_buffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
draw_model(scene, draw_cmd_buffers[i]);
draw_ui(draw_cmd_buffers[i]);
vkCmdEndRenderPass(draw_cmd_buffers[i]);
VK_CHECK(vkEndCommandBuffer(draw_cmd_buffers[i]));
}
}
void TextureMipMapGeneration::draw()
{
ApiVulkanSample::prepare_frame();
// Command buffer to be submitted to the queue
submit_info.commandBufferCount = 1;
submit_info.pCommandBuffers = &draw_cmd_buffers[current_buffer];
// Submit to queue
VK_CHECK(vkQueueSubmit(queue, 1, &submit_info, VK_NULL_HANDLE));
ApiVulkanSample::submit_frame();
}
void TextureMipMapGeneration::setup_descriptor_pool()
{
// Example uses one ubo and one image sampler
std::vector<VkDescriptorPoolSize> pool_sizes =
{
vkb::initializers::descriptor_pool_size(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
vkb::initializers::descriptor_pool_size(VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1),
vkb::initializers::descriptor_pool_size(VK_DESCRIPTOR_TYPE_SAMPLER, 3),
};
VkDescriptorPoolCreateInfo descriptor_pool_create_info =
vkb::initializers::descriptor_pool_create_info(
static_cast<uint32_t>(pool_sizes.size()),
pool_sizes.data(),
2);
VK_CHECK(vkCreateDescriptorPool(get_device().get_handle(), &descriptor_pool_create_info, nullptr, &descriptor_pool));
}
void TextureMipMapGeneration::setup_descriptor_set_layout()
{
std::vector<VkDescriptorSetLayoutBinding> set_layout_bindings =
{
// Binding 0 : Parameter uniform buffer
vkb::initializers::descriptor_set_layout_binding(
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT,
0),
// Binding 1 : Fragment shader image sampler
vkb::initializers::descriptor_set_layout_binding(
VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE,
VK_SHADER_STAGE_FRAGMENT_BIT,
1),
// Binding 2 : Sampler array (3 descriptors)
vkb::initializers::descriptor_set_layout_binding(
VK_DESCRIPTOR_TYPE_SAMPLER,
VK_SHADER_STAGE_FRAGMENT_BIT,
2,
3),
};
VkDescriptorSetLayoutCreateInfo descriptor_layout =
vkb::initializers::descriptor_set_layout_create_info(
set_layout_bindings.data(),
static_cast<uint32_t>(set_layout_bindings.size()));
VK_CHECK(vkCreateDescriptorSetLayout(get_device().get_handle(), &descriptor_layout, nullptr, &descriptor_set_layout));
VkPipelineLayoutCreateInfo pipeline_layout_create_info =
vkb::initializers::pipeline_layout_create_info(
&descriptor_set_layout,
1);
VK_CHECK(vkCreatePipelineLayout(get_device().get_handle(), &pipeline_layout_create_info, nullptr, &pipeline_layout));
}
void TextureMipMapGeneration::setup_descriptor_set()
{
VkDescriptorSetAllocateInfo alloc_info =
vkb::initializers::descriptor_set_allocate_info(
descriptor_pool,
&descriptor_set_layout,
1);
VK_CHECK(vkAllocateDescriptorSets(get_device().get_handle(), &alloc_info, &descriptor_set));
VkDescriptorBufferInfo buffer_descriptor = create_descriptor(*uniform_buffer);
VkDescriptorImageInfo image_descriptor;
image_descriptor.imageView = texture.view;
image_descriptor.sampler = VK_NULL_HANDLE;
image_descriptor.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
std::vector<VkWriteDescriptorSet> write_descriptor_sets =
{
// Binding 0 : Vertex shader uniform buffer
vkb::initializers::write_descriptor_set(
descriptor_set,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&buffer_descriptor),
// Binding 1 : Fragment shader texture sampler
vkb::initializers::write_descriptor_set(
descriptor_set,
VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE,
1,
&image_descriptor)};
// Binding 2: Sampler array
std::vector<VkDescriptorImageInfo> sampler_descriptors;
for (auto i = 0; i < samplers.size(); i++)
{
sampler_descriptors.push_back({samplers[i], VK_NULL_HANDLE, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL});
}
VkWriteDescriptorSet write_descriptor_set{};
write_descriptor_set.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
write_descriptor_set.dstSet = descriptor_set;
write_descriptor_set.descriptorType = VK_DESCRIPTOR_TYPE_SAMPLER;
write_descriptor_set.descriptorCount = static_cast<uint32_t>(sampler_descriptors.size());
write_descriptor_set.pImageInfo = sampler_descriptors.data();
write_descriptor_set.dstBinding = 2;
write_descriptor_set.dstArrayElement = 0;
write_descriptor_sets.push_back(write_descriptor_set);
vkUpdateDescriptorSets(get_device().get_handle(), static_cast<uint32_t>(write_descriptor_sets.size()), write_descriptor_sets.data(), 0, nullptr);
}
void TextureMipMapGeneration::prepare_pipelines()
{
VkPipelineInputAssemblyStateCreateInfo input_assembly_state =
vkb::initializers::pipeline_input_assembly_state_create_info(
VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
0,
VK_FALSE);
VkPipelineRasterizationStateCreateInfo rasterization_state =
vkb::initializers::pipeline_rasterization_state_create_info(
VK_POLYGON_MODE_FILL,
VK_CULL_MODE_NONE,
VK_FRONT_FACE_COUNTER_CLOCKWISE,
0);
VkPipelineColorBlendAttachmentState blend_attachment_state =
vkb::initializers::pipeline_color_blend_attachment_state(
0xf,
VK_FALSE);
VkPipelineColorBlendStateCreateInfo color_blend_state =
vkb::initializers::pipeline_color_blend_state_create_info(
1,
&blend_attachment_state);
VkPipelineDepthStencilStateCreateInfo depth_stencil_state =
vkb::initializers::pipeline_depth_stencil_state_create_info(
VK_TRUE,
VK_TRUE,
VK_COMPARE_OP_LESS_OR_EQUAL);
VkPipelineViewportStateCreateInfo viewport_state =
vkb::initializers::pipeline_viewport_state_create_info(1, 1, 0);
VkPipelineMultisampleStateCreateInfo multisample_state =
vkb::initializers::pipeline_multisample_state_create_info(
VK_SAMPLE_COUNT_1_BIT,
0);
std::vector<VkDynamicState> dynamic_state_enables = {
VK_DYNAMIC_STATE_VIEWPORT,
VK_DYNAMIC_STATE_SCISSOR};
VkPipelineDynamicStateCreateInfo dynamic_state =
vkb::initializers::pipeline_dynamic_state_create_info(
dynamic_state_enables.data(),
static_cast<uint32_t>(dynamic_state_enables.size()),
0);
// Load shaders
std::array<VkPipelineShaderStageCreateInfo, 2> shader_stages;
shader_stages[0] = load_shader("texture_mipmap_generation", "texture.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shader_stages[1] = load_shader("texture_mipmap_generation", "texture.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
// Vertex bindings and attributes
const std::vector<VkVertexInputBindingDescription> vertex_input_bindings = {
vkb::initializers::vertex_input_binding_description(0, sizeof(Vertex), VK_VERTEX_INPUT_RATE_VERTEX),
};
const std::vector<VkVertexInputAttributeDescription> vertex_input_attributes = {
vkb::initializers::vertex_input_attribute_description(0, 0, VK_FORMAT_R32G32B32_SFLOAT, 0), // Location 0: Position
vkb::initializers::vertex_input_attribute_description(0, 1, VK_FORMAT_R32G32_SFLOAT, sizeof(float) * 6), // Location 1: UV
};
VkPipelineVertexInputStateCreateInfo vertex_input_state = vkb::initializers::pipeline_vertex_input_state_create_info();
vertex_input_state.vertexBindingDescriptionCount = static_cast<uint32_t>(vertex_input_bindings.size());
vertex_input_state.pVertexBindingDescriptions = vertex_input_bindings.data();
vertex_input_state.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertex_input_attributes.size());
vertex_input_state.pVertexAttributeDescriptions = vertex_input_attributes.data();
VkGraphicsPipelineCreateInfo pipeline_create_info = vkb::initializers::pipeline_create_info(pipeline_layout, render_pass, 0);
pipeline_create_info.pVertexInputState = &vertex_input_state;
pipeline_create_info.pInputAssemblyState = &input_assembly_state;
pipeline_create_info.pRasterizationState = &rasterization_state;
pipeline_create_info.pColorBlendState = &color_blend_state;
pipeline_create_info.pMultisampleState = &multisample_state;
pipeline_create_info.pViewportState = &viewport_state;
pipeline_create_info.pDepthStencilState = &depth_stencil_state;
pipeline_create_info.pDynamicState = &dynamic_state;
pipeline_create_info.stageCount = static_cast<uint32_t>(shader_stages.size());
pipeline_create_info.pStages = shader_stages.data();
VK_CHECK(vkCreateGraphicsPipelines(get_device().get_handle(), pipeline_cache, 1, &pipeline_create_info, nullptr, &pipeline));
}
void TextureMipMapGeneration::prepare_uniform_buffers()
{
// Shared parameter uniform buffer block
uniform_buffer = std::make_unique<vkb::core::BufferC>(get_device(),
sizeof(ubo),
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
VMA_MEMORY_USAGE_CPU_TO_GPU);
update_uniform_buffers();
}
void TextureMipMapGeneration::update_uniform_buffers(float delta_time)
{
ubo.projection = camera.matrices.perspective;
ubo.model = camera.matrices.view;
ubo.model = glm::rotate(ubo.model, glm::radians(90.0f + timer * 360.0f), glm::vec3(0.0f, 0.0f, 1.0f));
ubo.model = glm::scale(ubo.model, glm::vec3(0.5f));
timer += delta_time * 0.005f;
if (timer > 1.0f)
{
timer -= 1.0f;
}
uniform_buffer->convert_and_update(ubo);
}
bool TextureMipMapGeneration::prepare(const vkb::ApplicationOptions &options)
{
if (!ApiVulkanSample::prepare(options))
{
return false;
}
camera.type = vkb::CameraType::FirstPerson;
camera.set_perspective(60.0f, static_cast<float>(width) / static_cast<float>(height), 0.1f, 1024.0f);
camera.set_translation(glm::vec3(0.0f, 0.0f, -12.5f));
load_assets();
prepare_uniform_buffers();
setup_descriptor_set_layout();
prepare_pipelines();
setup_descriptor_pool();
setup_descriptor_set();
build_command_buffers();
prepared = true;
return true;
}
void TextureMipMapGeneration::render(float delta_time)
{
if (!prepared)
{
return;
}
draw();
if (rotate_scene)
{
update_uniform_buffers(delta_time);
}
}
void TextureMipMapGeneration::view_changed()
{
update_uniform_buffers();
}
void TextureMipMapGeneration::on_update_ui_overlay(vkb::Drawer &drawer)
{
if (drawer.header("Settings"))
{
drawer.checkbox("Rotate", &rotate_scene);
if (drawer.slider_float("LOD bias", &ubo.lod_bias, 0.0f, static_cast<float>(texture.mip_levels)))
{
update_uniform_buffers();
}
if (drawer.combo_box("Sampler type", &ubo.sampler_index, sampler_names))
{
update_uniform_buffers();
}
}
}
std::unique_ptr<vkb::Application> create_texture_mipmap_generation()
{
return std::make_unique<TextureMipMapGeneration>();
}