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
72 lines
1.8 KiB
C++
72 lines
1.8 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 "gpu_backend.hh"
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#include "vk_common.hh"
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#include "shaderc/shaderc.hpp"
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namespace blender::gpu {
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class VKContext;
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class VKBackend : public GPUBackend {
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private:
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shaderc::Compiler shaderc_compiler_;
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public:
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VKBackend()
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{
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VKBackend::init_platform();
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}
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virtual ~VKBackend()
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{
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VKBackend::platform_exit();
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}
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void delete_resources() override;
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void samplers_update() override;
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void compute_dispatch(int groups_x_len, int groups_y_len, int groups_z_len) override;
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void compute_dispatch_indirect(StorageBuf *indirect_buf) override;
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Context *context_alloc(void *ghost_window, void *ghost_context) override;
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Batch *batch_alloc() override;
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DrawList *drawlist_alloc(int list_length) override;
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Fence *fence_alloc() override;
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FrameBuffer *framebuffer_alloc(const char *name) override;
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IndexBuf *indexbuf_alloc() override;
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PixelBuffer *pixelbuf_alloc(uint size) override;
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QueryPool *querypool_alloc() override;
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Shader *shader_alloc(const char *name) override;
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Texture *texture_alloc(const char *name) override;
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UniformBuf *uniformbuf_alloc(int size, const char *name) override;
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StorageBuf *storagebuf_alloc(int size, GPUUsageType usage, const char *name) override;
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VertBuf *vertbuf_alloc() override;
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/* Render Frame Coordination --
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* Used for performing per-frame actions globally */
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void render_begin() override;
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void render_end() override;
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void render_step() override;
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shaderc::Compiler &get_shaderc_compiler();
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static void capabilities_init(VKContext &context);
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private:
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static void init_platform();
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static void platform_exit();
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};
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} // namespace blender::gpu
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