ac07fb38a1
- Adding in compatibility paths to support minimum per-vertex strides for vertex formats. OpenGL supports a minimum stride of 1 byte, in Metal, this minimum stride is 4 bytes. Meaing a vertex format must be atleast 4-bytes in size. - Replacing transform feedback compile-time check to conditional look-up, given TF is supported on macOS with Metal. - 3D texture size safety check added as a general capability, rather than being in the gl backend only. Also required for Metal. Authored by Apple: Michael Parkin-White Ref T96261 Reviewed By: fclem Maniphest Tasks: T96261 Differential Revision: https://developer.blender.org/D14510
123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2016 by Mike Erwin. All rights reserved. */
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/** \file
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* \ingroup gpu
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*
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* GPU vertex buffer
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*/
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#pragma once
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#include "GPU_vertex_buffer.h"
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namespace blender::gpu {
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/**
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* Implementation of Vertex 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 VertBuf {
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public:
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static size_t memory_usage;
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GPUVertFormat format = {};
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/** Number of verts we want to draw. */
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uint vertex_len = 0;
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/** Number of verts data. */
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uint vertex_alloc = 0;
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/** Status flag. */
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GPUVertBufStatus flag = GPU_VERTBUF_INVALID;
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/** NULL indicates data in VRAM (unmapped) */
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uchar *data = nullptr;
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#ifndef NDEBUG
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/** Usage including extended usage flags. */
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GPUUsageType extended_usage_ = GPU_USAGE_STATIC;
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#endif
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protected:
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/** Usage hint for GL optimization. */
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GPUUsageType usage_ = GPU_USAGE_STATIC;
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private:
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/** This counter will only avoid freeing the #GPUVertBuf, not the data. */
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int handle_refcount_ = 1;
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public:
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VertBuf();
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virtual ~VertBuf();
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void init(const GPUVertFormat *format, GPUUsageType usage);
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void clear();
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/* Data management. */
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void allocate(uint vert_len);
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void resize(uint vert_len);
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void upload();
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virtual void bind_as_ssbo(uint binding) = 0;
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virtual void bind_as_texture(uint binding) = 0;
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virtual void wrap_handle(uint64_t handle) = 0;
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VertBuf *duplicate();
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/* Size of the data allocated. */
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size_t size_alloc_get() const
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{
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BLI_assert(format.packed);
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return vertex_alloc * format.stride;
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}
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/* Size of the data uploaded to the GPU. */
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size_t size_used_get() const
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{
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BLI_assert(format.packed);
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return vertex_len * format.stride;
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}
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void reference_add()
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{
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handle_refcount_++;
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}
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void reference_remove()
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{
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BLI_assert(handle_refcount_ > 0);
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handle_refcount_--;
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if (handle_refcount_ == 0) {
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delete this;
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}
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}
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GPUUsageType get_usage_type() const
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{
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return usage_;
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}
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virtual void update_sub(uint start, uint len, const void *data) = 0;
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virtual const void *read() const = 0;
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virtual void *unmap(const void *mapped_data) const = 0;
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protected:
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virtual void acquire_data() = 0;
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virtual void resize_data() = 0;
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virtual void release_data() = 0;
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virtual void upload_data() = 0;
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virtual void duplicate_data(VertBuf *dst) = 0;
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};
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/* Syntactic sugar. */
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static inline GPUVertBuf *wrap(VertBuf *vert)
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{
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return reinterpret_cast<GPUVertBuf *>(vert);
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}
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static inline VertBuf *unwrap(GPUVertBuf *vert)
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{
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return reinterpret_cast<VertBuf *>(vert);
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}
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static inline const VertBuf *unwrap(const GPUVertBuf *vert)
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{
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return reinterpret_cast<const VertBuf *>(vert);
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}
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} // namespace blender::gpu
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