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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Buffer.cpp: Implements the 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 "Buffer.h"
#include "main.h"
#include "VertexDataManager.h"
#include "IndexDataManager.h"
namespace es1
{
Buffer::Buffer(GLuint name) : NamedObject(name)
{
mContents = 0;
mSize = 0;
mUsage = GL_DYNAMIC_DRAW;
}
Buffer::~Buffer()
{
if(mContents)
{
mContents->destruct();
}
}
void Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage)
{
if(mContents)
{
mContents->destruct();
mContents = 0;
}
mSize = size;
mUsage = usage;
if(size > 0)
{
const int padding = 1024; // For SIMD processing of vertices
mContents = new sw::Resource(size + padding);
if(!mContents)
{
return error(GL_OUT_OF_MEMORY);
}
if(data)
{
memcpy((void*)mContents->data(), data, size);
}
}
}
void Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset)
{
if(mContents)
{
char *buffer = (char*)mContents->lock(sw::PUBLIC);
memcpy(buffer + offset, data, size);
mContents->unlock();
}
}
sw::Resource *Buffer::getResource()
{
return mContents;
}
}