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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GPU_COMMAND_BUFFER_CLIENT_VERTEX_ARRAY_OBJECT_MANAGER_H_
#define GPU_COMMAND_BUFFER_CLIENT_VERTEX_ARRAY_OBJECT_MANAGER_H_
#include <GLES2/gl2.h>
#include <stdint.h>
#include <memory>
#include <unordered_map>
#include "base/memory/raw_ptr.h"
#include "gles2_impl_export.h"
namespace gpu::gles2 {
class VertexArrayObject;
// VertexArrayObjectManager manages vertex array objects on the client side
// of the command buffer.
class GLES2_IMPL_EXPORT VertexArrayObjectManager {
public:
explicit VertexArrayObjectManager(GLuint max_vertex_attribs);
VertexArrayObjectManager(const VertexArrayObjectManager&) = delete;
VertexArrayObjectManager& operator=(const VertexArrayObjectManager&) = delete;
~VertexArrayObjectManager();
// Binds an element array.
// Returns true if service should be called.
bool BindElementArray(GLuint id);
// Unbind buffer.
void UnbindBuffer(GLuint id);
// Geneates array objects for the given ids.
void GenVertexArrays(GLsizei n, const GLuint* arrays);
// Deletes array objects for the given ids.
void DeleteVertexArrays(GLsizei n, const GLuint* arrays);
// Binds a vertex array.
// changed will be set to true if the service should be called.
// Returns false if array is an unknown id.
bool BindVertexArray(GLuint array, bool* changed);
void SetAttribEnable(GLuint index, bool enabled);
bool GetVertexAttrib(GLuint index, GLenum pname, uint32_t* param);
bool GetAttribPointer(GLuint index, GLenum pname, void** ptr) const;
// Returns false if error.
bool SetAttribPointer(
GLuint buffer_id,
GLuint index,
GLint size,
GLenum type,
GLboolean normalized,
GLsizei stride,
const void* ptr,
GLboolean integer);
void SetAttribDivisor(GLuint index, GLuint divisor);
GLuint bound_element_array_buffer() const;
private:
typedef std::unordered_map<GLuint, std::unique_ptr<VertexArrayObject>>
VertexArrayObjectMap;
GLsizei CollectData(const void* data,
GLsizei bytes_per_element,
GLsizei real_stride,
GLsizei num_elements);
GLuint max_vertex_attribs_;
GLsizei collection_buffer_size_;
std::unique_ptr<int8_t[]> collection_buffer_;
VertexArrayObjectMap vertex_array_objects_;
std::unique_ptr<VertexArrayObject> default_vertex_array_object_;
raw_ptr<VertexArrayObject> bound_vertex_array_object_;
};
} // namespace gpu::gles2
#endif // GPU_COMMAND_BUFFER_CLIENT_VERTEX_ARRAY_OBJECT_MANAGER_H_
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