pcsx2/plugins/GSdx/GSUniformBufferOGL.h

68 lines
1.6 KiB
C++

/*
* Copyright (C) 2011-2011 Gregory hainaut
* Copyright (C) 2007-2009 Gabest
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#pragma once
class GSUniformBufferOGL {
GLuint buffer; // data object
GLuint index; // GLSL slot
uint size; // size of the data
const GLenum target;
public:
GSUniformBufferOGL(GLuint index, uint size) : index(index)
, size(size)
,target(GL_UNIFORM_BUFFER)
{
glGenBuffers(1, &buffer);
bind();
allocate();
attach();
}
void bind()
{
glBindBuffer(target, buffer);
}
void allocate()
{
glBufferData(target, size, NULL, GL_STREAM_DRAW);
}
void attach()
{
glBindBufferBase(target, index, buffer);
}
void upload(const void* src)
{
uint32 flags = GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT;
uint8* dst = (uint8*) glMapBufferRange(target, 0, size, flags);
memcpy(dst, src, size);
glUnmapBuffer(target);
}
~GSUniformBufferOGL() {
glDeleteBuffers(1, &buffer);
}
};