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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2020 Blender Foundation. All rights reserved. */
/** \file
* \ingroup gpu
*/
#pragma once
#include "MEM_guardedalloc.h"
#include "GPU_texture.h"
#include "gpu_vertex_buffer_private.hh"
namespace blender {
namespace gpu {
class GLVertBuf : public VertBuf {
friend class GLTexture; /* For buffer texture. */
friend class GLShader; /* For transform feedback. */
friend class GLStorageBuf; /* For sub copy. */
private:
/** OpenGL buffer handle. Init on first upload. Immutable after that. */
GLuint vbo_id_ = 0;
/** Texture used if the buffer is bound as buffer texture. Init on first use. */
struct ::GPUTexture *buffer_texture_ = nullptr;
/** Defines whether the buffer handle is wrapped by this GLVertBuf, i.e. we do not own it and
* should not free it. */
bool is_wrapper_ = false;
/** Size on the GPU. */
size_t vbo_size_ = 0;
public:
void bind();
void update_sub(uint start, uint len, const void *data) override;
const void *read() const override;
void *unmap(const void *mapped_data) const override;
void wrap_handle(uint64_t handle) override;
protected:
void acquire_data() override;
void resize_data() override;
void release_data() override;
void upload_data() override;
void duplicate_data(VertBuf *dst) override;
void bind_as_ssbo(uint binding) override;
void bind_as_texture(uint binding) override;
private:
bool is_active() const;
MEM_CXX_CLASS_ALLOC_FUNCS("GLVertBuf");
};
static inline GLenum to_gl(GPUUsageType type)
{
switch (type) {
case GPU_USAGE_STREAM:
return GL_STREAM_DRAW;
case GPU_USAGE_DYNAMIC:
return GL_DYNAMIC_DRAW;
case GPU_USAGE_STATIC:
case GPU_USAGE_DEVICE_ONLY:
return GL_STATIC_DRAW;
default:
BLI_assert(0);
return GL_STATIC_DRAW;
}
}
static inline GLenum to_gl(GPUVertCompType type)
{
switch (type) {
case GPU_COMP_I8:
return GL_BYTE;
case GPU_COMP_U8:
return GL_UNSIGNED_BYTE;
case GPU_COMP_I16:
return GL_SHORT;
case GPU_COMP_U16:
return GL_UNSIGNED_SHORT;
case GPU_COMP_I32:
return GL_INT;
case GPU_COMP_U32:
return GL_UNSIGNED_INT;
case GPU_COMP_F32:
return GL_FLOAT;
case GPU_COMP_I10:
return GL_INT_2_10_10_10_REV;
default:
BLI_assert(0);
return GL_FLOAT;
}
}
} // namespace gpu
} // namespace blender
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