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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#ifndef INCLUDED_VCL_INC_OPENGL_TEXTURE_STATE_H
#define INCLUDED_VCL_INC_OPENGL_TEXTURE_STATE_H
#include <vcl/opengl/OpenGLHelper.hxx>
class TextureState
{
private:
GLuint mnCurrentTextureUnit;
std::vector<GLuint> maBoundTextures;
public:
TextureState()
: mnCurrentTextureUnit(0)
, maBoundTextures(4, 0)
{}
static void generate(GLuint& nTexture)
{
glGenTextures(1, &nTexture);
CHECK_GL_ERROR();
}
void active(GLuint nTextureUnit)
{
if (mnCurrentTextureUnit != nTextureUnit)
{
glActiveTexture(GL_TEXTURE0 + nTextureUnit);
CHECK_GL_ERROR();
mnCurrentTextureUnit = nTextureUnit;
}
}
void bind(GLuint nTexture)
{
if (maBoundTextures[mnCurrentTextureUnit] != nTexture)
{
glBindTexture(GL_TEXTURE_2D, nTexture);
CHECK_GL_ERROR();
maBoundTextures[mnCurrentTextureUnit] = nTexture;
}
}
void unbindAndDelete(GLuint nTexture)
{
unbind(nTexture);
glDeleteTextures(1, &nTexture);
}
void unbind(GLuint nTexture)
{
for (size_t i = 0; i < maBoundTextures.size(); i++)
{
if (nTexture == maBoundTextures[i])
maBoundTextures[i] = 0;
}
}
};
#endif // INCLUDED_VCL_INC_OPENGL_TEXTURE_STATE_H
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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