Jeroen Bakker
7fb1f060ff
This patch adds initial support for compute shaders to the vulkan backend. As the development is oriented to the test- cases we have the implementation is limited to what is used there. It has been validated that with this patch that the following test cases are running as expected - `GPUVulkanTest.gpu_shader_compute_vbo` - `GPUVulkanTest.gpu_shader_compute_ibo` - `GPUVulkanTest.gpu_shader_compute_ssbo` - `GPUVulkanTest.gpu_storage_buffer_create_update_read` - `GPUVulkanTest.gpu_shader_compute_2d` This patch includes: - Allocating VkBuffer on device. - Uploading data from CPU to VkBuffer. - Binding VkBuffer as SSBO to a compute shader. - Execute compute shader and altering VkBuffer. - Download the VkBuffer to CPU ram. - Validate that it worked. - Use device only vertex buffer as SSBO - Use device only index buffer as SSBO - Use device only image buffers GHOST API has been changed as the original design was created before we even had support for compute shaders in blender. The function `GHOST_getVulkanBackbuffer` has been separated to retrieve the command buffer without a backbuffer (`GHOST_getVulkanCommandBuffer`). In order to do correct command buffer processing we needed access to the queue owned by GHOST. This is returned as part of the `GHOST_getVulkanHandles` function. Open topics (not considered part of this patch) - Memory barriers & command buffer encoding - Indirect compute dispatching - Rest of the test cases - Data conversions when requested data format is different than on device. - GPUVulkanTest.gpu_shader_compute_1d is supported on AMD devices. NVIDIA doesn't seem to support 1d textures. Pull-request: #104518
70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2022 Blender Foundation. All rights reserved. */
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/** \file
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* \ingroup gpu
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*/
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#pragma once
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#include "BLI_sys_types.h"
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struct GPUStorageBuf;
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namespace blender {
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namespace gpu {
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class VertBuf;
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#ifdef DEBUG
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# define DEBUG_NAME_LEN 64
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#else
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# define DEBUG_NAME_LEN 8
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#endif
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/**
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* Implementation of Storage Buffers.
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* Base class which is then specialized for each implementation (GL, VK, ...).
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*/
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class StorageBuf {
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protected:
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/** Data size in bytes. */
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size_t size_in_bytes_;
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/** Continuous memory block to copy to GPU. This data is owned by the StorageBuf. */
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void *data_ = nullptr;
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/** Debugging name */
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char name_[DEBUG_NAME_LEN];
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public:
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StorageBuf(size_t size, const char *name);
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virtual ~StorageBuf();
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virtual void update(const void *data) = 0;
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virtual void bind(int slot) = 0;
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virtual void unbind() = 0;
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virtual void clear(eGPUTextureFormat internal_format,
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eGPUDataFormat data_format,
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void *data) = 0;
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virtual void copy_sub(VertBuf *src, uint dst_offset, uint src_offset, uint copy_size) = 0;
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virtual void read(void *data) = 0;
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};
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/* Syntactic sugar. */
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static inline GPUStorageBuf *wrap(StorageBuf *storage_buf)
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{
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return reinterpret_cast<GPUStorageBuf *>(storage_buf);
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}
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static inline StorageBuf *unwrap(GPUStorageBuf *storage_buf)
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{
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return reinterpret_cast<StorageBuf *>(storage_buf);
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}
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static inline const StorageBuf *unwrap(const GPUStorageBuf *storage_buf)
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{
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return reinterpret_cast<const StorageBuf *>(storage_buf);
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}
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#undef DEBUG_NAME_LEN
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} // namespace gpu
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} // namespace blender
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