mirror of
https://github.com/Kelsidavis/WoWee.git
synced 2026-05-08 01:53:52 +00:00
4b9b3026f4
Implement GPU-driven Hierarchical-Z occlusion culling for M2 doodads using a depth pyramid built from the previous frame's depth buffer. The cull shader projects bounding spheres via prevViewProj (temporal reprojection) and samples the HiZ pyramid to reject hidden objects before the main render pass. Key implementation details: - Separate early compute submission (beginSingleTimeCommands + fence wait) eliminates 2-frame visibility staleness - Conservative safeguards prevent false culls: screen-edge guard, full VP row-vector AABB projection (Cauchy-Schwarz), 50% sphere inflation, depth bias, mip+1, min screen size threshold, camera motion dampening (auto-disable on fast rotations), and per-instance previouslyVisible flag tracking - Graceful fallback to frustum-only culling if HiZ init fails Fix dark WMO interiors by gating shadow map sampling on isInterior==0 in the WMO fragment shader. Interior groups (flag 0x2000) now rely solely on pre-baked MOCV vertex-color lighting + MOHD ambient color. Disable interiorDarken globally (was incorrectly darkening outdoor M2s when camera was inside a WMO). Use isInsideInteriorWMO() instead of isInsideWMO() for correct indoor detection. New files: - hiz_system.hpp/cpp: pyramid image management, compute pipeline, descriptors, mip-chain build dispatch, resize handling - hiz_build.comp.glsl: MAX-depth 2x2 reduction compute shader - m2_cull_hiz.comp.glsl: frustum + HiZ occlusion cull compute shader - test_indoor_shadows.cpp: 14 unit tests for shadow/interior contracts Modified: - CullUniformsGPU expanded 128->272 bytes (HiZ params, viewProj, prevViewProj) - Depth buffer images gain VK_IMAGE_USAGE_SAMPLED_BIT for HiZ reads - wmo.frag.glsl: interior branch before unlit, shadow skip for 0x2000 - Render graph: hiz_build + compute_cull disabled (run in early compute) - .gitignore: ignore compiled .spv binaries - MEGA_BONE_MAX_INSTANCES: 2048 -> 4096 Signed-off-by: Pavel Okhlopkov <pavel.okhlopkov@flant.com>
517 lines
22 KiB
C++
517 lines
22 KiB
C++
#include "rendering/hiz_system.hpp"
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#include "rendering/vk_context.hpp"
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#include "rendering/vk_shader.hpp"
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#include "core/logger.hpp"
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#include "core/profiler.hpp"
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#include <cmath>
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#include <algorithm>
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namespace wowee {
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namespace rendering {
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HiZSystem::~HiZSystem() {
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shutdown();
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}
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bool HiZSystem::initialize(VkContext* ctx, uint32_t width, uint32_t height) {
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if (!ctx || width == 0 || height == 0) return false;
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ctx_ = ctx;
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fullWidth_ = width;
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fullHeight_ = height;
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// Pyramid mip 0 is half the full resolution (the first downscale)
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pyramidWidth_ = std::max(1u, width / 2);
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pyramidHeight_ = std::max(1u, height / 2);
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mipLevels_ = static_cast<uint32_t>(std::floor(std::log2(std::max(pyramidWidth_, pyramidHeight_)))) + 1;
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if (!createComputePipeline()) return false;
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if (!createPyramidImage()) { destroyComputePipeline(); return false; }
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if (!createDescriptors()) { destroyPyramidImage(); destroyComputePipeline(); return false; }
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ready_ = true;
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LOG_INFO("HiZSystem: initialized ", pyramidWidth_, "x", pyramidHeight_,
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" pyramid (", mipLevels_, " mips) from ", width, "x", height, " depth");
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return true;
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}
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void HiZSystem::shutdown() {
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if (!ctx_) return;
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VkDevice device = ctx_->getDevice();
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vkDeviceWaitIdle(device);
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destroyDescriptors();
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destroyPyramidImage();
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destroyComputePipeline();
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ctx_ = nullptr;
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ready_ = false;
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}
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bool HiZSystem::resize(uint32_t width, uint32_t height) {
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if (!ctx_) return false;
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VkDevice device = ctx_->getDevice();
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vkDeviceWaitIdle(device);
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destroyDescriptors();
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destroyPyramidImage();
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fullWidth_ = width;
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fullHeight_ = height;
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pyramidWidth_ = std::max(1u, width / 2);
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pyramidHeight_ = std::max(1u, height / 2);
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mipLevels_ = static_cast<uint32_t>(std::floor(std::log2(std::max(pyramidWidth_, pyramidHeight_)))) + 1;
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if (!createPyramidImage()) return false;
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if (!createDescriptors()) { destroyPyramidImage(); return false; }
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ready_ = true;
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LOG_INFO("HiZSystem: resized to ", pyramidWidth_, "x", pyramidHeight_,
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" (", mipLevels_, " mips)");
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return true;
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}
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// --- Pyramid image creation ---
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bool HiZSystem::createPyramidImage() {
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VkDevice device = ctx_->getDevice();
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VmaAllocator alloc = ctx_->getAllocator();
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for (uint32_t f = 0; f < MAX_FRAMES; f++) {
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// Create R32F image with full mip chain
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VkImageCreateInfo imgCi{VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO};
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imgCi.imageType = VK_IMAGE_TYPE_2D;
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imgCi.format = VK_FORMAT_R32_SFLOAT;
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imgCi.extent = {pyramidWidth_, pyramidHeight_, 1};
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imgCi.mipLevels = mipLevels_;
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imgCi.arrayLayers = 1;
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imgCi.samples = VK_SAMPLE_COUNT_1_BIT;
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imgCi.tiling = VK_IMAGE_TILING_OPTIMAL;
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imgCi.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_STORAGE_BIT;
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imgCi.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
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VmaAllocationCreateInfo allocCi{};
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allocCi.usage = VMA_MEMORY_USAGE_GPU_ONLY;
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if (vmaCreateImage(alloc, &imgCi, &allocCi, &pyramidImage_[f], &pyramidAlloc_[f], nullptr) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create pyramid image for frame ", f);
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return false;
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}
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// View of ALL mip levels (for sampling in the cull shader)
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VkImageViewCreateInfo viewCi{VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO};
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viewCi.image = pyramidImage_[f];
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viewCi.viewType = VK_IMAGE_VIEW_TYPE_2D;
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viewCi.format = VK_FORMAT_R32_SFLOAT;
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viewCi.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
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viewCi.subresourceRange.baseMipLevel = 0;
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viewCi.subresourceRange.levelCount = mipLevels_;
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viewCi.subresourceRange.layerCount = 1;
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if (vkCreateImageView(device, &viewCi, nullptr, &pyramidViewAll_[f]) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create pyramid view-all for frame ", f);
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return false;
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}
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// Per-mip views (for storage image writes in the build shader)
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pyramidMipViews_[f].resize(mipLevels_, VK_NULL_HANDLE);
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for (uint32_t mip = 0; mip < mipLevels_; mip++) {
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VkImageViewCreateInfo mipViewCi{VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO};
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mipViewCi.image = pyramidImage_[f];
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mipViewCi.viewType = VK_IMAGE_VIEW_TYPE_2D;
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mipViewCi.format = VK_FORMAT_R32_SFLOAT;
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mipViewCi.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
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mipViewCi.subresourceRange.baseMipLevel = mip;
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mipViewCi.subresourceRange.levelCount = 1;
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mipViewCi.subresourceRange.layerCount = 1;
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if (vkCreateImageView(device, &mipViewCi, nullptr, &pyramidMipViews_[f][mip]) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create mip ", mip, " view for frame ", f);
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return false;
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}
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}
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}
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// Sampler for depth reads and HiZ pyramid reads (nearest, clamp)
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VkSamplerCreateInfo samplerCi{VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO};
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samplerCi.magFilter = VK_FILTER_NEAREST;
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samplerCi.minFilter = VK_FILTER_NEAREST;
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samplerCi.mipmapMode = VK_SAMPLER_MIPMAP_MODE_NEAREST;
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samplerCi.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
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samplerCi.addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
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samplerCi.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
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samplerCi.maxLod = static_cast<float>(mipLevels_);
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if (vkCreateSampler(device, &samplerCi, nullptr, &depthSampler_) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create sampler");
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return false;
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}
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return true;
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}
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void HiZSystem::destroyPyramidImage() {
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if (!ctx_) return;
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VkDevice device = ctx_->getDevice();
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VmaAllocator alloc = ctx_->getAllocator();
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if (depthSampler_) { vkDestroySampler(device, depthSampler_, nullptr); depthSampler_ = VK_NULL_HANDLE; }
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for (uint32_t f = 0; f < MAX_FRAMES; f++) {
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for (auto& view : pyramidMipViews_[f]) {
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if (view) { vkDestroyImageView(device, view, nullptr); view = VK_NULL_HANDLE; }
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}
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pyramidMipViews_[f].clear();
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if (pyramidViewAll_[f]) { vkDestroyImageView(device, pyramidViewAll_[f], nullptr); pyramidViewAll_[f] = VK_NULL_HANDLE; }
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if (depthSamplerView_[f]) { vkDestroyImageView(device, depthSamplerView_[f], nullptr); depthSamplerView_[f] = VK_NULL_HANDLE; }
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if (pyramidImage_[f]) { vmaDestroyImage(alloc, pyramidImage_[f], pyramidAlloc_[f]); pyramidImage_[f] = VK_NULL_HANDLE; }
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}
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}
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// --- Compute pipeline ---
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bool HiZSystem::createComputePipeline() {
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VkDevice device = ctx_->getDevice();
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// Build descriptor set layout for pyramid build (set 0):
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// binding 0: combined image sampler (source depth / previous mip)
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// binding 1: storage image (destination mip)
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VkDescriptorSetLayoutBinding bindings[2] = {};
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bindings[0].binding = 0;
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bindings[0].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
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bindings[0].descriptorCount = 1;
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bindings[0].stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
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bindings[1].binding = 1;
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bindings[1].descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
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bindings[1].descriptorCount = 1;
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bindings[1].stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
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VkDescriptorSetLayoutCreateInfo layoutCi{VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO};
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layoutCi.bindingCount = 2;
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layoutCi.pBindings = bindings;
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if (vkCreateDescriptorSetLayout(device, &layoutCi, nullptr, &buildSetLayout_) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create build set layout");
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return false;
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}
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// HiZ sampling layout (for M2 cull shader, set 1):
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// binding 0: combined image sampler (HiZ pyramid, all mips)
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VkDescriptorSetLayoutBinding hizBinding{};
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hizBinding.binding = 0;
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hizBinding.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
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hizBinding.descriptorCount = 1;
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hizBinding.stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
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VkDescriptorSetLayoutCreateInfo hizLayoutCi{VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO};
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hizLayoutCi.bindingCount = 1;
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hizLayoutCi.pBindings = &hizBinding;
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if (vkCreateDescriptorSetLayout(device, &hizLayoutCi, nullptr, &hizSetLayout_) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create HiZ set layout");
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return false;
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}
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// Push constant range for build shader
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VkPushConstantRange pushRange{};
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pushRange.stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
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pushRange.offset = 0;
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pushRange.size = sizeof(HiZBuildPushConstants);
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VkPipelineLayoutCreateInfo plCi{VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO};
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plCi.setLayoutCount = 1;
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plCi.pSetLayouts = &buildSetLayout_;
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plCi.pushConstantRangeCount = 1;
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plCi.pPushConstantRanges = &pushRange;
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if (vkCreatePipelineLayout(device, &plCi, nullptr, &buildPipelineLayout_) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create build pipeline layout");
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return false;
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}
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// Load and create compute pipeline
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VkShaderModule buildShader;
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if (!buildShader.loadFromFile(device, "assets/shaders/hiz_build.comp.spv")) {
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LOG_ERROR("HiZSystem: failed to load hiz_build.comp.spv");
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return false;
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}
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VkComputePipelineCreateInfo cpCi{VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO};
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cpCi.stage = buildShader.stageInfo(VK_SHADER_STAGE_COMPUTE_BIT);
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cpCi.layout = buildPipelineLayout_;
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if (vkCreateComputePipelines(device, ctx_->getPipelineCache(), 1, &cpCi, nullptr, &buildPipeline_) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create build compute pipeline");
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buildShader.destroy();
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return false;
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}
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buildShader.destroy();
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return true;
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}
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void HiZSystem::destroyComputePipeline() {
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if (!ctx_) return;
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VkDevice device = ctx_->getDevice();
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if (buildPipeline_) { vkDestroyPipeline(device, buildPipeline_, nullptr); buildPipeline_ = VK_NULL_HANDLE; }
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if (buildPipelineLayout_) { vkDestroyPipelineLayout(device, buildPipelineLayout_, nullptr); buildPipelineLayout_ = VK_NULL_HANDLE; }
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if (buildSetLayout_) { vkDestroyDescriptorSetLayout(device, buildSetLayout_, nullptr); buildSetLayout_ = VK_NULL_HANDLE; }
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if (hizSetLayout_) { vkDestroyDescriptorSetLayout(device, hizSetLayout_, nullptr); hizSetLayout_ = VK_NULL_HANDLE; }
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}
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// --- Descriptors ---
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bool HiZSystem::createDescriptors() {
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VkDevice device = ctx_->getDevice();
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// Pool: per-frame × per-mip build sets + 2 HiZ sampling sets
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// Each build set needs 1 sampler + 1 storage image
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// Each HiZ sampling set needs 1 sampler
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const uint32_t totalBuildSets = MAX_FRAMES * mipLevels_;
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const uint32_t totalHizSets = MAX_FRAMES;
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const uint32_t totalSets = totalBuildSets + totalHizSets;
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VkDescriptorPoolSize poolSizes[2] = {};
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poolSizes[0] = {VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, totalBuildSets + totalHizSets};
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poolSizes[1] = {VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, totalBuildSets};
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VkDescriptorPoolCreateInfo poolCi{VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO};
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poolCi.maxSets = totalSets;
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poolCi.poolSizeCount = 2;
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poolCi.pPoolSizes = poolSizes;
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if (vkCreateDescriptorPool(device, &poolCi, nullptr, &buildDescPool_) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create descriptor pool");
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return false;
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}
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// We use the same pool for both build and HiZ sets — simpler cleanup
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hizDescPool_ = VK_NULL_HANDLE; // sharing buildDescPool_
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for (uint32_t f = 0; f < MAX_FRAMES; f++) {
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// Create a temporary depth image view for sampling the depth buffer.
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// This is SEPARATE from the VkContext's depth image view because we need
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// DEPTH aspect sampling which requires specific format view.
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{
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VkImage depthSrc = ctx_->getDepthCopySourceImage();
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VkImageViewCreateInfo viewCi{VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO};
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viewCi.image = depthSrc;
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viewCi.viewType = VK_IMAGE_VIEW_TYPE_2D;
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viewCi.format = ctx_->getDepthFormat();
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viewCi.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
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viewCi.subresourceRange.levelCount = 1;
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viewCi.subresourceRange.layerCount = 1;
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if (vkCreateImageView(device, &viewCi, nullptr, &depthSamplerView_[f]) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to create depth sampler view for frame ", f);
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return false;
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}
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}
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// Allocate per-mip build descriptor sets
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buildDescSets_[f].resize(mipLevels_);
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for (uint32_t mip = 0; mip < mipLevels_; mip++) {
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VkDescriptorSetAllocateInfo allocInfo{VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO};
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allocInfo.descriptorPool = buildDescPool_;
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allocInfo.descriptorSetCount = 1;
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allocInfo.pSetLayouts = &buildSetLayout_;
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if (vkAllocateDescriptorSets(device, &allocInfo, &buildDescSets_[f][mip]) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to allocate build desc set frame=", f, " mip=", mip);
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return false;
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}
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// Write descriptors:
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// Binding 0 (sampler): mip 0 reads depth buffer, mip N reads pyramid mip N-1
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VkDescriptorImageInfo srcInfo{};
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srcInfo.sampler = depthSampler_;
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if (mip == 0) {
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srcInfo.imageView = depthSamplerView_[f];
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srcInfo.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
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} else {
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srcInfo.imageView = pyramidViewAll_[f]; // shader uses texelFetch with explicit mip
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srcInfo.imageLayout = VK_IMAGE_LAYOUT_GENERAL;
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}
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// Binding 1 (storage image): write to current mip
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VkDescriptorImageInfo dstInfo{};
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dstInfo.imageView = pyramidMipViews_[f][mip];
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dstInfo.imageLayout = VK_IMAGE_LAYOUT_GENERAL;
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VkWriteDescriptorSet writes[2] = {};
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writes[0] = {VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET};
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writes[0].dstSet = buildDescSets_[f][mip];
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writes[0].dstBinding = 0;
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writes[0].descriptorCount = 1;
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writes[0].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
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writes[0].pImageInfo = &srcInfo;
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writes[1] = {VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET};
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writes[1].dstSet = buildDescSets_[f][mip];
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writes[1].dstBinding = 1;
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writes[1].descriptorCount = 1;
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writes[1].descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_IMAGE;
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writes[1].pImageInfo = &dstInfo;
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vkUpdateDescriptorSets(device, 2, writes, 0, nullptr);
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}
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// Allocate HiZ sampling descriptor set (for M2 cull shader)
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{
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VkDescriptorSetAllocateInfo allocInfo{VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO};
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allocInfo.descriptorPool = buildDescPool_;
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allocInfo.descriptorSetCount = 1;
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allocInfo.pSetLayouts = &hizSetLayout_;
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if (vkAllocateDescriptorSets(device, &allocInfo, &hizDescSet_[f]) != VK_SUCCESS) {
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LOG_ERROR("HiZSystem: failed to allocate HiZ sampling desc set for frame ", f);
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return false;
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}
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VkDescriptorImageInfo hizInfo{};
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hizInfo.sampler = depthSampler_;
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hizInfo.imageView = pyramidViewAll_[f];
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hizInfo.imageLayout = VK_IMAGE_LAYOUT_GENERAL;
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VkWriteDescriptorSet write{VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET};
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write.dstSet = hizDescSet_[f];
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write.dstBinding = 0;
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write.descriptorCount = 1;
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write.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
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write.pImageInfo = &hizInfo;
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vkUpdateDescriptorSets(device, 1, &write, 0, nullptr);
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}
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}
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return true;
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}
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void HiZSystem::destroyDescriptors() {
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if (!ctx_) return;
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VkDevice device = ctx_->getDevice();
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// All descriptor sets are freed when pool is destroyed
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if (buildDescPool_) { vkDestroyDescriptorPool(device, buildDescPool_, nullptr); buildDescPool_ = VK_NULL_HANDLE; }
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// hizDescPool_ shares buildDescPool_, so nothing extra to destroy
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for (uint32_t f = 0; f < MAX_FRAMES; f++) {
|
||
buildDescSets_[f].clear();
|
||
hizDescSet_[f] = VK_NULL_HANDLE;
|
||
if (depthSamplerView_[f]) { vkDestroyImageView(device, depthSamplerView_[f], nullptr); depthSamplerView_[f] = VK_NULL_HANDLE; }
|
||
}
|
||
}
|
||
|
||
// --- Pyramid build dispatch ---
|
||
|
||
void HiZSystem::buildPyramid(VkCommandBuffer cmd, uint32_t frameIndex, VkImage depthImage) {
|
||
ZoneScopedN("HiZSystem::buildPyramid");
|
||
if (!ready_ || !buildPipeline_) return;
|
||
|
||
// Transition depth image from DEPTH_STENCIL_ATTACHMENT to SHADER_READ_ONLY for sampling
|
||
{
|
||
VkImageMemoryBarrier barrier{VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER};
|
||
barrier.srcAccessMask = VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
|
||
barrier.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
|
||
barrier.oldLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
|
||
barrier.newLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
|
||
barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
barrier.image = depthImage;
|
||
barrier.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
|
||
barrier.subresourceRange.levelCount = 1;
|
||
barrier.subresourceRange.layerCount = 1;
|
||
|
||
vkCmdPipelineBarrier(cmd,
|
||
VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT,
|
||
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
|
||
0, 0, nullptr, 0, nullptr, 1, &barrier);
|
||
}
|
||
|
||
// Transition entire pyramid to GENERAL layout for storage writes
|
||
{
|
||
VkImageMemoryBarrier barrier{VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER};
|
||
barrier.srcAccessMask = 0;
|
||
barrier.dstAccessMask = VK_ACCESS_SHADER_WRITE_BIT;
|
||
barrier.oldLayout = VK_IMAGE_LAYOUT_UNDEFINED;
|
||
barrier.newLayout = VK_IMAGE_LAYOUT_GENERAL;
|
||
barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
barrier.image = pyramidImage_[frameIndex];
|
||
barrier.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
||
barrier.subresourceRange.baseMipLevel = 0;
|
||
barrier.subresourceRange.levelCount = mipLevels_;
|
||
barrier.subresourceRange.layerCount = 1;
|
||
|
||
vkCmdPipelineBarrier(cmd,
|
||
VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
|
||
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
|
||
0, 0, nullptr, 0, nullptr, 1, &barrier);
|
||
}
|
||
|
||
vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_COMPUTE, buildPipeline_);
|
||
|
||
// Build each mip level sequentially
|
||
uint32_t mipW = pyramidWidth_;
|
||
uint32_t mipH = pyramidHeight_;
|
||
|
||
for (uint32_t mip = 0; mip < mipLevels_; mip++) {
|
||
// Bind descriptor set for this mip level
|
||
vkCmdBindDescriptorSets(cmd, VK_PIPELINE_BIND_POINT_COMPUTE,
|
||
buildPipelineLayout_, 0, 1, &buildDescSets_[frameIndex][mip], 0, nullptr);
|
||
|
||
// Push constants: destination size + mip level
|
||
HiZBuildPushConstants pc{};
|
||
pc.dstWidth = static_cast<int32_t>(mipW);
|
||
pc.dstHeight = static_cast<int32_t>(mipH);
|
||
pc.mipLevel = static_cast<int32_t>(mip);
|
||
vkCmdPushConstants(cmd, buildPipelineLayout_, VK_SHADER_STAGE_COMPUTE_BIT,
|
||
0, sizeof(pc), &pc);
|
||
|
||
// Dispatch compute
|
||
uint32_t groupsX = (mipW + 7) / 8;
|
||
uint32_t groupsY = (mipH + 7) / 8;
|
||
vkCmdDispatch(cmd, groupsX, groupsY, 1);
|
||
|
||
// Barrier between mip levels: ensure writes to mip N are visible before reads for mip N+1
|
||
if (mip + 1 < mipLevels_) {
|
||
VkImageMemoryBarrier mipBarrier{VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER};
|
||
mipBarrier.srcAccessMask = VK_ACCESS_SHADER_WRITE_BIT;
|
||
mipBarrier.dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
|
||
mipBarrier.oldLayout = VK_IMAGE_LAYOUT_GENERAL;
|
||
mipBarrier.newLayout = VK_IMAGE_LAYOUT_GENERAL;
|
||
mipBarrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
mipBarrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
mipBarrier.image = pyramidImage_[frameIndex];
|
||
mipBarrier.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
||
mipBarrier.subresourceRange.baseMipLevel = mip;
|
||
mipBarrier.subresourceRange.levelCount = 1;
|
||
mipBarrier.subresourceRange.layerCount = 1;
|
||
|
||
vkCmdPipelineBarrier(cmd,
|
||
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
|
||
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
|
||
0, 0, nullptr, 0, nullptr, 1, &mipBarrier);
|
||
}
|
||
|
||
// Next mip level dimensions
|
||
mipW = std::max(1u, mipW / 2);
|
||
mipH = std::max(1u, mipH / 2);
|
||
}
|
||
|
||
// Transition depth back to DEPTH_STENCIL_ATTACHMENT for next frame
|
||
{
|
||
VkImageMemoryBarrier barrier{VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER};
|
||
barrier.srcAccessMask = VK_ACCESS_SHADER_READ_BIT;
|
||
barrier.dstAccessMask = VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT |
|
||
VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT;
|
||
barrier.oldLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
|
||
barrier.newLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
|
||
barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
|
||
barrier.image = depthImage;
|
||
barrier.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
|
||
barrier.subresourceRange.levelCount = 1;
|
||
barrier.subresourceRange.layerCount = 1;
|
||
|
||
vkCmdPipelineBarrier(cmd,
|
||
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
|
||
VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT,
|
||
0, 0, nullptr, 0, nullptr, 1, &barrier);
|
||
}
|
||
}
|
||
|
||
} // namespace rendering
|
||
} // namespace wowee
|