mirror of
https://github.com/dolphin-emu/dolphin.git
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106 lines
2.3 KiB
C++
106 lines
2.3 KiB
C++
// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Globals.h"
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#include "GLUtil.h"
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#include "StreamBuffer.h"
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namespace OGL
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{
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StreamBuffer::StreamBuffer(u32 type, size_t size)
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: m_buffertype(type), m_size(size), m_iterator(0)
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{
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glGenBuffers(1, &m_buffer);
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m_uploadtype = MAP_AND_ORPHAN;
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Init();
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}
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StreamBuffer::~StreamBuffer()
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{
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Shutdown();
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glDeleteBuffers(1, &m_buffer);
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}
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void StreamBuffer::Align ( u32 stride )
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{
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if(m_iterator) {
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m_iterator--;
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m_iterator = m_iterator - (m_iterator % stride) + stride;
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}
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}
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void StreamBuffer::Alloc ( size_t size )
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{
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switch(m_uploadtype) {
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case MAP_AND_ORPHAN:
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if(m_iterator+size >= m_size) {
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glBufferData(m_buffertype, m_size, NULL, GL_STREAM_DRAW);
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m_iterator = 0;
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}
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break;
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case BUFFERSUBDATA:
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m_iterator = 0;
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break;
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}
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}
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size_t StreamBuffer::Upload ( u8* data, size_t size )
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{
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switch(m_uploadtype) {
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case MAP_AND_ORPHAN:
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pointer = (u8*)glMapBufferRange(m_buffertype, m_iterator, size, GL_MAP_WRITE_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
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if(pointer) {
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memcpy(pointer, data, size);
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glUnmapBuffer(m_buffertype);
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} else {
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ERROR_LOG(VIDEO, "buffer mapping failed");
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}
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break;
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case BUFFERSUBDATA:
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glBufferSubData(m_buffertype, m_iterator, size, data);
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break;
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}
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size_t ret = m_iterator;
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m_iterator += size;
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return ret;
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}
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void StreamBuffer::Init()
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{
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switch(m_uploadtype) {
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case MAP_AND_ORPHAN:
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case BUFFERSUBDATA:
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glBindBuffer(m_buffertype, m_buffer);
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glBufferData(m_buffertype, m_size, NULL, GL_STREAM_DRAW);
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break;
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}
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}
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void StreamBuffer::Shutdown()
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{
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switch(m_uploadtype) {
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case MAP_AND_ORPHAN:
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case BUFFERSUBDATA:
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break;
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}
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}
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}
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