1// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//    http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// Buffer.cpp: Implements the Buffer class, representing storage of vertex and/or
16// index data. Implements GL buffer objects and related functionality.
17
18#include "Buffer.h"
19
20#include "main.h"
21#include "VertexDataManager.h"
22#include "IndexDataManager.h"
23
24namespace gl
25{
26
27Buffer::Buffer(GLuint name) : NamedObject(name)
28{
29	mContents = 0;
30	mSize = 0;
31	mUsage = GL_DYNAMIC_DRAW;
32}
33
34Buffer::~Buffer()
35{
36	if(mContents)
37	{
38		mContents->destruct();
39	}
40}
41
42void Buffer::bufferData(const void *data, GLsizeiptr size, GLenum usage)
43{
44	if(mContents)
45	{
46		mContents->destruct();
47		mContents = 0;
48	}
49
50	mSize = size;
51	mUsage = usage;
52
53	if(size > 0)
54	{
55		const int padding = 1024;   // For SIMD processing of vertices
56		mContents = new sw::Resource(size + padding);
57
58		if(!mContents)
59		{
60			return error(GL_OUT_OF_MEMORY);
61		}
62
63		if(data)
64		{
65			memcpy((void*)mContents->data(), data, size);
66		}
67	}
68}
69
70void Buffer::bufferSubData(const void *data, GLsizeiptr size, GLintptr offset)
71{
72	if(mContents)
73	{
74		char *buffer = (char*)mContents->lock(sw::PUBLIC);
75		memcpy(buffer + offset, data, size);
76		mContents->unlock();
77	}
78}
79
80sw::Resource *Buffer::getResource()
81{
82	return mContents;
83}
84
85}
86