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vk_buffer_cache: Use emulated null buffers for transform feedback

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Vulkan does not support null buffers on transform feedback bindings.
Emulate these using the same null buffer we were using for index
buffers.
This commit is contained in:
ReinUsesLisp 2021-07-09 01:27:47 -03:00
parent 975a7b3a78
commit 5a45d295da
2 changed files with 19 additions and 11 deletions
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24
src/video_core/renderer_vulkan/vk_buffer_cache.cpp
View File

@ -152,8 +152,8 @@ void BufferCacheRuntime::BindIndexBuffer(PrimitiveTopology topology, IndexFormat
}
if (vk_buffer == VK_NULL_HANDLE) {
// Vulkan doesn't support null index buffers. Replace it with our own null buffer.
ReserveNullIndexBuffer();
vk_buffer = *null_index_buffer;
ReserveNullBuffer();
vk_buffer = *null_buffer;
}
scheduler.Record([vk_buffer, vk_offset, vk_index_type](vk::CommandBuffer cmdbuf) {
cmdbuf.BindIndexBuffer(vk_buffer, vk_offset, vk_index_type);
@ -195,6 +195,14 @@ void BufferCacheRuntime::BindTransformFeedbackBuffer(u32 index, VkBuffer buffer,
// Already logged in the rasterizer
return;
}
if (buffer == VK_NULL_HANDLE) {
// Vulkan doesn't support null transform feedback buffers.
// Replace it with our own null buffer.
ReserveNullBuffer();
buffer = *null_buffer;
offset = 0;
size = 0;
}
scheduler.Record([index, buffer, offset, size](vk::CommandBuffer cmdbuf) {
const VkDeviceSize vk_offset = offset;
const VkDeviceSize vk_size = size;
@ -279,11 +287,11 @@ void BufferCacheRuntime::ReserveQuadArrayLUT(u32 num_indices, bool wait_for_idle
});
}
void BufferCacheRuntime::ReserveNullIndexBuffer() {
if (null_index_buffer) {
void BufferCacheRuntime::ReserveNullBuffer() {
if (null_buffer) {
return;
}
null_index_buffer = device.GetLogical().CreateBuffer(VkBufferCreateInfo{
null_buffer = device.GetLogical().CreateBuffer(VkBufferCreateInfo{
.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
.pNext = nullptr,
.flags = 0,
@ -294,12 +302,12 @@ void BufferCacheRuntime::ReserveNullIndexBuffer() {
.pQueueFamilyIndices = nullptr,
});
if (device.HasDebuggingToolAttached()) {
null_index_buffer.SetObjectNameEXT("Null index buffer");
null_buffer.SetObjectNameEXT("Null index buffer");
}
null_index_buffer_commit = memory_allocator.Commit(null_index_buffer, MemoryUsage::DeviceLocal);
null_buffer_commit = memory_allocator.Commit(null_buffer, MemoryUsage::DeviceLocal);
scheduler.RequestOutsideRenderPassOperationContext();
scheduler.Record([buffer = *null_index_buffer](vk::CommandBuffer cmdbuf) {
scheduler.Record([buffer = *null_buffer](vk::CommandBuffer cmdbuf) {
cmdbuf.FillBuffer(buffer, 0, VK_WHOLE_SIZE, 0);
});
}

6
src/video_core/renderer_vulkan/vk_buffer_cache.h
View File

@ -92,7 +92,7 @@ private:
void ReserveQuadArrayLUT(u32 num_indices, bool wait_for_idle);
void ReserveNullIndexBuffer();
void ReserveNullBuffer();
const Device& device;
MemoryAllocator& memory_allocator;
@ -105,8 +105,8 @@ private:
VkIndexType quad_array_lut_index_type{};
u32 current_num_indices = 0;
vk::Buffer null_index_buffer;
MemoryCommit null_index_buffer_commit;
vk::Buffer null_buffer;
MemoryCommit null_buffer_commit;
Uint8Pass uint8_pass;
QuadIndexedPass quad_index_pass;