mirror of https://github.com/PCSX2/pcsx2.git
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/*
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* Copyright (C) 2011-2011 Gregory hainaut
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* Copyright (C) 2007-2009 Gabest
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*
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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; either version 2, or (at your option)
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* any later version.
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*
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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 for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Make; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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*/
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#pragma once
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#include "GLState.h"
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class GSUniformBufferOGL {
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GLuint buffer; // data object
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GLuint index; // GLSL slot
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uint32 size; // size of the data
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public:
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GSUniformBufferOGL(GLuint index, uint32 size) : index(index)
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, size(size)
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{
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gl_GenBuffers(1, &buffer);
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bind();
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allocate();
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attach();
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}
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void bind()
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{
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if (GLState::ubo != buffer) {
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GLState::ubo = buffer;
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gl_BindBuffer(GL_UNIFORM_BUFFER, buffer);
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}
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}
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void allocate()
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{
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gl_BufferData(GL_UNIFORM_BUFFER, size, NULL, GL_STREAM_DRAW);
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}
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void attach()
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{
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// From the opengl manpage:
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// glBindBufferBase also binds buffer to the generic buffer binding point specified by target
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GLState::ubo = buffer;
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gl_BindBufferBase(GL_UNIFORM_BUFFER, index, buffer);
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}
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void upload(const void* src)
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{
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bind();
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// glMapBufferRange allow to set various parameter but the call is
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// synchronous whereas glBufferSubData could be asynchronous.
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// TODO: investigate the extension ARB_invalidate_subdata
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gl_BufferSubData(GL_UNIFORM_BUFFER, 0, size, src);
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}
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~GSUniformBufferOGL() {
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gl_DeleteBuffers(1, &buffer);
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}
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};
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