chromium/third_party/angle/src/libANGLE/renderer/gl/BufferGL.cpp

//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// BufferGL.cpp: Implements the class methods for BufferGL.

#include "libANGLE/renderer/gl/BufferGL.h"

#include "common/debug.h"
#include "common/utilities.h"
#include "libANGLE/Context.h"
#include "libANGLE/angletypes.h"
#include "libANGLE/formatutils.h"
#include "libANGLE/renderer/gl/ContextGL.h"
#include "libANGLE/renderer/gl/FunctionsGL.h"
#include "libANGLE/renderer/gl/StateManagerGL.h"
#include "libANGLE/renderer/gl/renderergl_utils.h"

namespace rx
{

namespace
{

bool KeepBufferShadowCopy(const gl::Context *context, gl::WebGLBufferType webglType)
{ … }

}  // namespace

// Use the GL_COPY_READ_BUFFER binding when two buffers need to be bound simultaneously.
// GL_ELEMENT_ARRAY_BUFFER is supported on more versions but can modify the state of the currently
// bound VAO.  Two simultaneous buffer bindings are only needed for glCopyBufferSubData which also
// adds the GL_COPY_READ_BUFFER binding.
static constexpr gl::BufferBinding SourceBufferOperationTarget = …;

// Use the GL_ELEMENT_ARRAY_BUFFER binding for most operations since it's available on all
// supported GL versions and doesn't affect any current state when it changes.
static constexpr gl::BufferBinding DestBufferOperationTarget = …;

BufferGL::BufferGL(const gl::BufferState &state, GLuint buffer)
    : … { … }

BufferGL::~BufferGL()
{ … }

void BufferGL::destroy(const gl::Context *context)
{ … }

angle::Result BufferGL::setData(const gl::Context *context,
                                gl::BufferBinding target,
                                const void *data,
                                size_t size,
                                gl::BufferUsage usage)
{ … }

angle::Result BufferGL::setSubData(const gl::Context *context,
                                   gl::BufferBinding target,
                                   const void *data,
                                   size_t size,
                                   size_t offset)
{ … }

angle::Result BufferGL::copySubData(const gl::Context *context,
                                    BufferImpl *source,
                                    GLintptr sourceOffset,
                                    GLintptr destOffset,
                                    GLsizeiptr size)
{ … }

angle::Result BufferGL::map(const gl::Context *context, GLenum access, void **mapPtr)
{ … }

angle::Result BufferGL::mapRange(const gl::Context *context,
                                 size_t offset,
                                 size_t length,
                                 GLbitfield access,
                                 void **mapPtr)
{ … }

angle::Result BufferGL::unmap(const gl::Context *context, GLboolean *result)
{ … }

angle::Result BufferGL::getIndexRange(const gl::Context *context,
                                      gl::DrawElementsType type,
                                      size_t offset,
                                      size_t count,
                                      bool primitiveRestartEnabled,
                                      gl::IndexRange *outRange)
{ … }

size_t BufferGL::getBufferSize() const
{ … }

GLuint BufferGL::getBufferID() const
{ … }
}  // namespace rx