5d132ac0c6
`GLBatch::draw_indirect` has additional overhead compared to `GLBatch::draw`, and can become a bottleneck in scenes that require many draw calls (ie. with too many unique meshes). The performance difference is almost exclusively caused by the `GL_COMMAND_BARRIER_BIT` barrier that happens on every call. This PR adds a `GPU_storagebuf_sync_as_indirect_buffer` function that can be used to place the barrier only once after filling the indirect buffer content. This function is a no-op in Vulkan and Metal since they don't need the barrier. Pull Request: https://projects.blender.org/blender/blender/pulls/117561
54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
/* SPDX-FileCopyrightText: 2022 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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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 "MEM_guardedalloc.h"
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#include "gpu_storage_buffer_private.hh"
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namespace blender {
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namespace gpu {
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/**
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* Implementation of Storage Buffers using OpenGL.
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*/
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class GLStorageBuf : public StorageBuf {
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private:
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/** Slot to which this UBO is currently bound. -1 if not bound. */
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int slot_ = -1;
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/** OpenGL Object handle. */
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GLuint ssbo_id_ = 0;
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/** Usage type. */
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GPUUsageType usage_;
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public:
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GLStorageBuf(size_t size, GPUUsageType usage, const char *name);
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~GLStorageBuf();
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void update(const void *data) override;
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void bind(int slot) override;
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void unbind() override;
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void clear(uint32_t clear_value) override;
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void copy_sub(VertBuf *src, uint dst_offset, uint src_offset, uint copy_size) override;
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void read(void *data) override;
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void async_flush_to_host() override;
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void sync_as_indirect_buffer() override;
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/* Special internal function to bind SSBOs to indirect argument targets. */
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void bind_as(GLenum target);
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private:
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void init();
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MEM_CXX_CLASS_ALLOC_FUNCS("GLStorageBuf");
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};
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} // namespace gpu
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} // namespace blender
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