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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#ifndef _GLShaderParam_H_
#define _GLShaderParam_H_
#include "../api.h"
#include "OGLHelper.h"
#include "Pixel32.h"
#include "GLContext.h"
#include "../base/GLMHelper.h"
#include "../base/Exception.h"
#include <boost/shared_ptr.hpp>
#include <string>
namespace avg {
class OGLShader;
typedef boost::shared_ptr<OGLShader> OGLShaderPtr;
class AVG_API GLShaderParam
{
public:
GLShaderParam(OGLShader* pShader, const std::string& sName);
virtual ~GLShaderParam() {};
const std::string& getName() const;
protected:
int getLocation() const;
private:
std::string m_sName;
int m_Location;
};
template<class VAL_TYPE>
class AVG_TEMPLATE_API GLShaderParamTemplate: public GLShaderParam
{
public:
GLShaderParamTemplate(OGLShader* pShader, const std::string& sName)
: GLShaderParam(pShader, sName),
m_bValSet(false)
{};
void set(const VAL_TYPE& val)
{
if (!m_bValSet || m_Val != val) {
uniformSet(getLocation(), val);
GLContext::checkError("OGLShaderParam::set");
m_Val = val;
m_bValSet = true;
}
};
private:
void uniformSet(unsigned location, const VAL_TYPE& val)
{
AVG_ASSERT_MSG(false,
getName()+"GLShaderParam::uniformSet() called for unsupported type.");
};
bool m_bValSet;
VAL_TYPE m_Val;
};
template<>
void GLShaderParamTemplate<int>::uniformSet(unsigned location, const int& val);
template<>
void GLShaderParamTemplate<float>::uniformSet(unsigned location, const float& val);
template<>
void GLShaderParamTemplate<glm::vec2>::uniformSet(unsigned location,
const glm::vec2& val);
template<>
void GLShaderParamTemplate<Pixel32>::uniformSet(unsigned location, const Pixel32& val);
template<>
void GLShaderParamTemplate<glm::vec4>::uniformSet(unsigned location,
const glm::vec4& val);
template<>
void GLShaderParamTemplate<glm::mat4>::uniformSet(unsigned location,
const glm::mat4& val);
typedef boost::shared_ptr<GLShaderParam> GLShaderParamPtr;
typedef GLShaderParamTemplate<int> IntGLShaderParam;
typedef boost::shared_ptr<IntGLShaderParam> IntGLShaderParamPtr;
typedef GLShaderParamTemplate<float> FloatGLShaderParam;
typedef boost::shared_ptr<FloatGLShaderParam> FloatGLShaderParamPtr;
typedef GLShaderParamTemplate<glm::vec2> Vec2fGLShaderParam;
typedef boost::shared_ptr<Vec2fGLShaderParam> Vec2fGLShaderParamPtr;
typedef GLShaderParamTemplate<Pixel32> ColorGLShaderParam;
typedef boost::shared_ptr<ColorGLShaderParam> ColorGLShaderParamPtr;
typedef GLShaderParamTemplate<glm::vec4> Vec4fGLShaderParam;
typedef boost::shared_ptr<Vec4fGLShaderParam> Vec4fGLShaderParamPtr;
typedef GLShaderParamTemplate<glm::mat4> Mat4fGLShaderParam;
typedef boost::shared_ptr<Mat4fGLShaderParam> Mat4fGLShaderParamPtr;
}
#endif
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