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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_index_buffer_private.hh"
#include <epoxy/gl.h>
namespace blender::gpu {
class GLIndexBuf : public IndexBuf {
friend class GLBatch;
friend class GLDrawList;
friend class GLShader; /* For compute shaders. */
private:
GLuint ibo_id_ = 0;
public:
~GLIndexBuf();
void bind();
void bind_as_ssbo(uint binding) override;
const uint32_t *read() const override;
void *offset_ptr(uint additional_vertex_offset) const
{
additional_vertex_offset += index_start_;
if (index_type_ == GPU_INDEX_U32) {
return reinterpret_cast<void *>(static_cast<intptr_t>(additional_vertex_offset) *
sizeof(GLuint));
}
return reinterpret_cast<void *>(static_cast<intptr_t>(additional_vertex_offset) *
sizeof(GLushort));
}
GLuint restart_index() const
{
return (index_type_ == GPU_INDEX_U16) ? 0xFFFFu : 0xFFFFFFFFu;
}
void upload_data() override;
void update_sub(uint start, uint len, const void *data) override;
private:
bool is_active() const;
void strip_restart_indices() override
{
/* No-op. */
}
MEM_CXX_CLASS_ALLOC_FUNCS("GLIndexBuf")
};
static inline GLenum to_gl(GPUIndexBufType type)
{
return (type == GPU_INDEX_U32) ? GL_UNSIGNED_INT : GL_UNSIGNED_SHORT;
}
} // namespace blender::gpu
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