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//
// Copyright (c) 2002-2014 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.
//
// Buffer.cpp: Implements the gl::Buffer class, representing storage of vertex and/or
// index data. Implements GL buffer objects and related functionality.
// [OpenGL ES 2.0.24] section 2.9 page 21.
#include "libANGLE/Buffer.h"
#include "libANGLE/renderer/BufferImpl.h"
#include "libANGLE/renderer/Renderer.h"
namespace gl
{
Buffer::Buffer(rx::BufferImpl *impl, GLuint id)
: RefCountObject(id),
mBuffer(impl),
mUsage(GL_DYNAMIC_DRAW),
mSize(0),
mAccessFlags(0),
mMapped(GL_FALSE),
mMapPointer(NULL),
mMapOffset(0),
mMapLength(0)
{
}
Buffer::~Buffer()
{
SafeDelete(mBuffer);
}
Error Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage)
{
gl::Error error = mBuffer->setData(data, size, usage);
if (error.isError())
{
return error;
}
mIndexRangeCache.clear();
mUsage = usage;
mSize = size;
return error;
}
Error Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset)
{
gl::Error error = mBuffer->setSubData(data, size, offset);
if (error.isError())
{
return error;
}
mIndexRangeCache.invalidateRange(offset, size);
return error;
}
Error Buffer::copyBufferSubData(Buffer* source, GLintptr sourceOffset, GLintptr destOffset, GLsizeiptr size)
{
gl::Error error = mBuffer->copySubData(source->getImplementation(), sourceOffset, destOffset, size);
if (error.isError())
{
return error;
}
mIndexRangeCache.invalidateRange(destOffset, size);
return error;
}
Error Buffer::mapRange(GLintptr offset, GLsizeiptr length, GLbitfield access)
{
ASSERT(!mMapped);
ASSERT(offset + length <= mSize);
Error error = mBuffer->map(offset, length, access, &mMapPointer);
if (error.isError())
{
mMapPointer = NULL;
return error;
}
mMapped = GL_TRUE;
mMapOffset = static_cast<GLint64>(offset);
mMapLength = static_cast<GLint64>(length);
mAccessFlags = static_cast<GLint>(access);
if ((access & GL_MAP_WRITE_BIT) > 0)
{
mIndexRangeCache.invalidateRange(offset, length);
}
return error;
}
Error Buffer::unmap()
{
ASSERT(mMapped);
Error error = mBuffer->unmap();
if (error.isError())
{
return error;
}
mMapped = GL_FALSE;
mMapPointer = NULL;
mMapOffset = 0;
mMapLength = 0;
mAccessFlags = 0;
return error;
}
}
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