void updateUniformBuffers()
{
uboVS.projection = camera.matrices.perspective;
uboVS.view = camera.matrices.view;
uboVS.model = glm::mat4(1.0f);
VK_CHECK_RESULT(uniformBuffer.map());
uniformBuffer.copyTo(&uboVS, sizeof(uboVS));
uniformBuffer.unmap();
}
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(uboVS)));
VK_CHECK_RESULT(uniformBuffer.map());
updateUniformBuffers();
}
// Prepare and initialize uniform buffer containing shader uniforms
void prepareUniformBuffers()
{
// Create the 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,
&uniformBuffer,
sizeof(uboVS)));
// Map persistent
VK_CHECK_RESULT(uniformBuffer.map());
updateUniformBuffers();
}
/*
[POI] Extension specific setup
Gets the function pointers required for conditonal rendering
Sets up a dedicated conditional buffer that is used to determine visibility at draw time
*/
void prepareConditionalRendering()
{
/*
The conditional rendering functions are part of an extension so they have to be loaded manually
*/
vkCmdBeginConditionalRenderingEXT = (PFN_vkCmdBeginConditionalRenderingEXT)vkGetDeviceProcAddr(device, "vkCmdBeginConditionalRenderingEXT");
if (!vkCmdBeginConditionalRenderingEXT) {
vks::tools::exitFatal("Could not get a valid function pointer for vkCmdBeginConditionalRenderingEXT", -1);
}
vkCmdEndConditionalRenderingEXT = (PFN_vkCmdEndConditionalRenderingEXT)vkGetDeviceProcAddr(device, "vkCmdEndConditionalRenderingEXT");
if (!vkCmdEndConditionalRenderingEXT) {
vks::tools::exitFatal("Could not get a valid function pointer for vkCmdEndConditionalRenderingEXT", -1);
}
/*
Create the buffer that contains the conditional rendering information
A single conditional value is 32 bits and if it's zero the rendering commands are discarded
This sample renders multiple rows of objects conditionally, so we setup a buffer with one value per row
*/
conditionalVisibility.resize(scene.linearNodes.size());
VK_CHECK_RESULT(vulkanDevice->createBuffer(
VK_BUFFER_USAGE_CONDITIONAL_RENDERING_BIT_EXT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
&conditionalBuffer,
sizeof(int32_t) *conditionalVisibility.size(),
conditionalVisibility.data()));
VK_CHECK_RESULT(conditionalBuffer.map());
// By default, all parts of the glTF are visible
for (auto i = 0; i < conditionalVisibility.size(); i++) {
conditionalVisibility[i] = 1;
}
/*
Copy visibility data
*/
updateConditionalBuffer();
}
/**
* Prepare all vulkan resources required to render the font
* The text overlay uses separate resources for descriptors (pool, sets, layouts), pipelines and command buffers
*/
void prepareResources()
{
static unsigned char font24pixels[STB_FONT_HEIGHT][STB_FONT_WIDTH];
STB_FONT_NAME(stbFontData, font24pixels, STB_FONT_HEIGHT);
// Command buffer
// Pool
VkCommandPoolCreateInfo cmdPoolInfo = {};
cmdPoolInfo.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
cmdPoolInfo.queueFamilyIndex = vulkanDevice->queueFamilyIndices.graphics;
cmdPoolInfo.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
VK_CHECK_RESULT(vkCreateCommandPool(vulkanDevice->logicalDevice, &cmdPoolInfo, nullptr, &commandPool));
VkCommandBufferAllocateInfo cmdBufAllocateInfo =
vks::initializers::commandBufferAllocateInfo(
commandPool,
VK_COMMAND_BUFFER_LEVEL_PRIMARY,
(uint32_t)cmdBuffers.size());
VK_CHECK_RESULT(vkAllocateCommandBuffers(vulkanDevice->logicalDevice, &cmdBufAllocateInfo, cmdBuffers.data()));
// Vertex buffer
VK_CHECK_RESULT(vulkanDevice->createBuffer(
VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
&vertexBuffer,
MAX_CHAR_COUNT * sizeof(glm::vec4)));
// Map persistent
vertexBuffer.map();
// Font texture
VkImageCreateInfo imageInfo = vks::initializers::imageCreateInfo();
imageInfo.imageType = VK_IMAGE_TYPE_2D;
imageInfo.format = VK_FORMAT_R8_UNORM;
imageInfo.extent.width = STB_FONT_WIDTH;
imageInfo.extent.height = STB_FONT_HEIGHT;
imageInfo.extent.depth = 1;
imageInfo.mipLevels = 1;
imageInfo.arrayLayers = 1;
imageInfo.samples = VK_SAMPLE_COUNT_1_BIT;
imageInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
imageInfo.usage = VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
imageInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
imageInfo.initialLayout = VK_IMAGE_LAYOUT_PREINITIALIZED;
VK_CHECK_RESULT(vkCreateImage(vulkanDevice->logicalDevice, &imageInfo, nullptr, &image));
VkMemoryRequirements memReqs;
VkMemoryAllocateInfo allocInfo = vks::initializers::memoryAllocateInfo();
vkGetImageMemoryRequirements(vulkanDevice->logicalDevice, image, &memReqs);
allocInfo.allocationSize = memReqs.size;
allocInfo.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
VK_CHECK_RESULT(vkAllocateMemory(vulkanDevice->logicalDevice, &allocInfo, nullptr, &imageMemory));
VK_CHECK_RESULT(vkBindImageMemory(vulkanDevice->logicalDevice, image, imageMemory, 0));
// Staging
vks::Buffer stagingBuffer;
VK_CHECK_RESULT(vulkanDevice->createBuffer(
VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
&stagingBuffer,
allocInfo.allocationSize));
stagingBuffer.map();
memcpy(stagingBuffer.mapped, &font24pixels[0][0], STB_FONT_WIDTH * STB_FONT_HEIGHT); // Only one channel, so data size = W * H (*R8)
stagingBuffer.unmap();
// Copy to image
VkCommandBuffer copyCmd;
cmdBufAllocateInfo.commandBufferCount = 1;
VK_CHECK_RESULT(vkAllocateCommandBuffers(vulkanDevice->logicalDevice, &cmdBufAllocateInfo, ©Cmd));
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
VK_CHECK_RESULT(vkBeginCommandBuffer(copyCmd, &cmdBufInfo));
// Prepare for transfer
vks::tools::setImageLayout(
copyCmd,
image,
VK_IMAGE_ASPECT_COLOR_BIT,
VK_IMAGE_LAYOUT_PREINITIALIZED,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
VkBufferImageCopy bufferCopyRegion = {};
bufferCopyRegion.imageSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
bufferCopyRegion.imageSubresource.mipLevel = 0;
bufferCopyRegion.imageSubresource.layerCount = 1;
bufferCopyRegion.imageExtent.width = STB_FONT_WIDTH;
bufferCopyRegion.imageExtent.height = STB_FONT_HEIGHT;
bufferCopyRegion.imageExtent.depth = 1;
vkCmdCopyBufferToImage(
copyCmd,
stagingBuffer.buffer,
image,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
1,
&bufferCopyRegion
);
// Prepare for shader read
vks::tools::setImageLayout(
copyCmd,
image,
VK_IMAGE_ASPECT_COLOR_BIT,
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
VK_CHECK_RESULT(vkEndCommandBuffer(copyCmd));
VkSubmitInfo submitInfo = vks::initializers::submitInfo();
submitInfo.commandBufferCount = 1;
submitInfo.pCommandBuffers = ©Cmd;
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
VK_CHECK_RESULT(vkQueueWaitIdle(queue));
stagingBuffer.destroy();
vkFreeCommandBuffers(vulkanDevice->logicalDevice, commandPool, 1, ©Cmd);
VkImageViewCreateInfo imageViewInfo = vks::initializers::imageViewCreateInfo();
imageViewInfo.image = image;
imageViewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
imageViewInfo.format = imageInfo.format;
imageViewInfo.components = { VK_COMPONENT_SWIZZLE_R, VK_COMPONENT_SWIZZLE_G, VK_COMPONENT_SWIZZLE_B, VK_COMPONENT_SWIZZLE_A };
imageViewInfo.subresourceRange = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
VK_CHECK_RESULT(vkCreateImageView(vulkanDevice->logicalDevice, &imageViewInfo, nullptr, &view));
// Sampler
VkSamplerCreateInfo samplerInfo = vks::initializers::samplerCreateInfo();
samplerInfo.magFilter = VK_FILTER_LINEAR;
samplerInfo.minFilter = VK_FILTER_LINEAR;
samplerInfo.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
samplerInfo.addressModeU = VK_SAMPLER_ADDRESS_MODE_REPEAT;
samplerInfo.addressModeV = VK_SAMPLER_ADDRESS_MODE_REPEAT;
samplerInfo.addressModeW = VK_SAMPLER_ADDRESS_MODE_REPEAT;
samplerInfo.mipLodBias = 0.0f;
samplerInfo.compareOp = VK_COMPARE_OP_NEVER;
samplerInfo.minLod = 0.0f;
samplerInfo.maxLod = 1.0f;
samplerInfo.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
samplerInfo.maxAnisotropy = 1.0f;
VK_CHECK_RESULT(vkCreateSampler(vulkanDevice->logicalDevice, &samplerInfo, nullptr, &sampler));
// Descriptor
// Font uses a separate descriptor pool
std::array<VkDescriptorPoolSize, 1> poolSizes;
poolSizes[0] = vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1);
VkDescriptorPoolCreateInfo descriptorPoolInfo =
vks::initializers::descriptorPoolCreateInfo(
static_cast<uint32_t>(poolSizes.size()),
poolSizes.data(),
1);
VK_CHECK_RESULT(vkCreateDescriptorPool(vulkanDevice->logicalDevice, &descriptorPoolInfo, nullptr, &descriptorPool));
// Descriptor set layout
std::array<VkDescriptorSetLayoutBinding, 1> setLayoutBindings;
setLayoutBindings[0] = vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0);
VkDescriptorSetLayoutCreateInfo descriptorSetLayoutInfo =
vks::initializers::descriptorSetLayoutCreateInfo(
setLayoutBindings.data(),
static_cast<uint32_t>(setLayoutBindings.size()));
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(vulkanDevice->logicalDevice, &descriptorSetLayoutInfo, nullptr, &descriptorSetLayout));
// Pipeline layout
VkPipelineLayoutCreateInfo pipelineLayoutInfo =
vks::initializers::pipelineLayoutCreateInfo(
&descriptorSetLayout,
1);
VK_CHECK_RESULT(vkCreatePipelineLayout(vulkanDevice->logicalDevice, &pipelineLayoutInfo, nullptr, &pipelineLayout));
// Descriptor set
VkDescriptorSetAllocateInfo descriptorSetAllocInfo =
vks::initializers::descriptorSetAllocateInfo(
descriptorPool,
&descriptorSetLayout,
1);
VK_CHECK_RESULT(vkAllocateDescriptorSets(vulkanDevice->logicalDevice, &descriptorSetAllocInfo, &descriptorSet));
VkDescriptorImageInfo texDescriptor =
vks::initializers::descriptorImageInfo(
sampler,
view,
VK_IMAGE_LAYOUT_GENERAL);
std::array<VkWriteDescriptorSet, 1> writeDescriptorSets;
writeDescriptorSets[0] = vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &texDescriptor);
vkUpdateDescriptorSets(vulkanDevice->logicalDevice, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
// Pipeline cache
VkPipelineCacheCreateInfo pipelineCacheCreateInfo = {};
pipelineCacheCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO;
VK_CHECK_RESULT(vkCreatePipelineCache(vulkanDevice->logicalDevice, &pipelineCacheCreateInfo, nullptr, &pipelineCache));
// Command buffer execution fence
VkFenceCreateInfo fenceCreateInfo = vks::initializers::fenceCreateInfo();
VK_CHECK_RESULT(vkCreateFence(vulkanDevice->logicalDevice, &fenceCreateInfo, nullptr, &fence));
}