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fix(rendering): defer model buffer destruction and per-frame FXAA descriptors

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CharacterRenderer::destroyModelGPU now defers vertex/index buffer
destruction when replacing models mid-stream, preventing use-after-free
on AMD RADV. FXAA descriptor sets are now per-frame to eliminate
write-read races between in-flight command buffers. Water reflection
descriptor update narrowed to current frame only.
This commit is contained in:
Kelsi 2026-04-03 19:17:55 -07:00
parent e19bf76d88
commit 40e72d535e
5 changed files with 71 additions and 43 deletions
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54
src/rendering/post_process_pipeline.cpp
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@ -198,7 +198,9 @@ bool PostProcessPipeline::executePostProcessing(VkCommandBuffer cmd, uint32_t im
// FSR3+FXAA combined: re-point FXAA's descriptor to the FSR3 temporal output
// so renderFXAAPass() applies spatial AA on the temporally-stabilized frame.
// This must happen outside the render pass (descriptor updates are CPU-side).
if (fxaa_.enabled && fxaa_.descSet && fxaa_.sceneSampler) {
// Use per-frame descriptor set to avoid race with in-flight command buffers.
uint32_t fxaaFrameIdx = vkCtx_->getCurrentFrame();
if (fxaa_.enabled && fxaa_.descSet[fxaaFrameIdx] && fxaa_.sceneSampler) {
VkImageView fsr3OutputView = VK_NULL_HANDLE;
if (fsr2_.useAmdBackend) {
if (fsr2_.amdFsr3FramegenRuntimeActive && fsr2_.framegenOutput.image)
@ -215,7 +217,7 @@ bool PostProcessPipeline::executePostProcessing(VkCommandBuffer cmd, uint32_t im
imgInfo.sampler = fxaa_.sceneSampler;
VkWriteDescriptorSet write{};
write.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
write.dstSet = fxaa_.descSet;
write.dstSet = fxaa_.descSet[fxaaFrameIdx];
write.dstBinding = 0;
write.descriptorCount = 1;
write.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
@ -257,23 +259,23 @@ bool PostProcessPipeline::executePostProcessing(VkCommandBuffer cmd, uint32_t im
// of RCAS sharpening. FXAA descriptor is temporarily pointed to the FSR3
// history buffer (which is already in SHADER_READ_ONLY_OPTIMAL). This gives
// FSR3 temporal stability + FXAA spatial edge smoothing ("ultra quality native").
if (fxaa_.enabled && fxaa_.pipeline && fxaa_.descSet) {
if (fxaa_.enabled && fxaa_.pipeline && fxaa_.descSet[fxaaFrameIdx]) {
renderFXAAPass();
} else {
// Draw RCAS sharpening from accumulated history buffer
renderFSR2Sharpen();
}
// Restore FXAA descriptor to its normal scene color source so standalone
// FXAA frames are not affected by the FSR3 history pointer set above.
if (fxaa_.enabled && fxaa_.descSet && fxaa_.sceneSampler && fxaa_.sceneColor.imageView) {
// Restore this frame's FXAA descriptor to its normal scene color source
// so standalone FXAA frames are not affected by the FSR3 history pointer.
if (fxaa_.enabled && fxaa_.descSet[fxaaFrameIdx] && fxaa_.sceneSampler && fxaa_.sceneColor.imageView) {
VkDescriptorImageInfo restoreInfo{};
restoreInfo.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
restoreInfo.imageView = fxaa_.sceneColor.imageView;
restoreInfo.sampler = fxaa_.sceneSampler;
VkWriteDescriptorSet restoreWrite{};
restoreWrite.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
restoreWrite.dstSet = fxaa_.descSet;
restoreWrite.dstSet = fxaa_.descSet[fxaaFrameIdx];
restoreWrite.dstBinding = 0;
restoreWrite.descriptorCount = 1;
restoreWrite.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
@ -1754,36 +1756,41 @@ bool PostProcessPipeline::initFXAAResources() {
layoutInfo.pBindings = &binding;
vkCreateDescriptorSetLayout(device, &layoutInfo, nullptr, &fxaa_.descSetLayout);
constexpr uint32_t setCount = FXAAState::DESC_SET_COUNT;
VkDescriptorPoolSize poolSize{};
poolSize.type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
poolSize.descriptorCount = 1;
poolSize.descriptorCount = setCount;
VkDescriptorPoolCreateInfo poolInfo{};
poolInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
poolInfo.maxSets = 1;
poolInfo.maxSets = setCount;
poolInfo.poolSizeCount = 1;
poolInfo.pPoolSizes = &poolSize;
vkCreateDescriptorPool(device, &poolInfo, nullptr, &fxaa_.descPool);
VkDescriptorSetLayout layouts[setCount];
for (uint32_t i = 0; i < setCount; i++) layouts[i] = fxaa_.descSetLayout;
VkDescriptorSetAllocateInfo dsAllocInfo{};
dsAllocInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
dsAllocInfo.descriptorPool = fxaa_.descPool;
dsAllocInfo.descriptorSetCount = 1;
dsAllocInfo.pSetLayouts = &fxaa_.descSetLayout;
vkAllocateDescriptorSets(device, &dsAllocInfo, &fxaa_.descSet);
dsAllocInfo.descriptorSetCount = setCount;
dsAllocInfo.pSetLayouts = layouts;
vkAllocateDescriptorSets(device, &dsAllocInfo, fxaa_.descSet);
// Bind the resolved 1x sceneColor
// Bind the resolved 1x sceneColor to all per-frame sets
VkDescriptorImageInfo imgInfo{};
imgInfo.sampler = fxaa_.sceneSampler;
imgInfo.imageView = fxaa_.sceneColor.imageView;
imgInfo.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
VkWriteDescriptorSet write{};
write.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
write.dstSet = fxaa_.descSet;
write.dstBinding = 0;
write.descriptorCount = 1;
write.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
write.pImageInfo = &imgInfo;
vkUpdateDescriptorSets(device, 1, &write, 0, nullptr);
for (uint32_t i = 0; i < setCount; i++) {
VkWriteDescriptorSet write{};
write.sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
write.dstSet = fxaa_.descSet[i];
write.dstBinding = 0;
write.descriptorCount = 1;
write.descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
write.pImageInfo = &imgInfo;
vkUpdateDescriptorSets(device, 1, &write, 0, nullptr);
}
// Pipeline layout — push constant holds vec4(rcpFrame.xy, sharpness, pad)
VkPushConstantRange pc{};
@ -1843,7 +1850,7 @@ void PostProcessPipeline::destroyFXAAResources() {
if (fxaa_.pipeline) { vkDestroyPipeline(device, fxaa_.pipeline, nullptr); fxaa_.pipeline = VK_NULL_HANDLE; }
if (fxaa_.pipelineLayout) { vkDestroyPipelineLayout(device, fxaa_.pipelineLayout, nullptr); fxaa_.pipelineLayout = VK_NULL_HANDLE; }
if (fxaa_.descPool) { vkDestroyDescriptorPool(device, fxaa_.descPool, nullptr); fxaa_.descPool = VK_NULL_HANDLE; fxaa_.descSet = VK_NULL_HANDLE; }
if (fxaa_.descPool) { vkDestroyDescriptorPool(device, fxaa_.descPool, nullptr); fxaa_.descPool = VK_NULL_HANDLE; for (auto& s : fxaa_.descSet) s = VK_NULL_HANDLE; }
if (fxaa_.descSetLayout) { vkDestroyDescriptorSetLayout(device, fxaa_.descSetLayout, nullptr); fxaa_.descSetLayout = VK_NULL_HANDLE; }
if (fxaa_.sceneFramebuffer) { vkDestroyFramebuffer(device, fxaa_.sceneFramebuffer, nullptr); fxaa_.sceneFramebuffer = VK_NULL_HANDLE; }
fxaa_.sceneSampler = VK_NULL_HANDLE; // Owned by VkContext sampler cache
@ -1857,9 +1864,10 @@ void PostProcessPipeline::renderFXAAPass() {
if (!fxaa_.pipeline || currentCmd_ == VK_NULL_HANDLE) return;
VkExtent2D ext = vkCtx_->getSwapchainExtent();
uint32_t fi = vkCtx_->getCurrentFrame();
vkCmdBindPipeline(currentCmd_, VK_PIPELINE_BIND_POINT_GRAPHICS, fxaa_.pipeline);
vkCmdBindDescriptorSets(currentCmd_, VK_PIPELINE_BIND_POINT_GRAPHICS,
fxaa_.pipelineLayout, 0, 1, &fxaa_.descSet, 0, nullptr);
fxaa_.pipelineLayout, 0, 1, &fxaa_.descSet[fi], 0, nullptr);
// Pass rcpFrame + sharpness + effect flag (vec4, 16 bytes).
// When FSR2/FSR3 is active alongside FXAA, forward FSR2's sharpness so the