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// This file may be redistributed and modified only under the terms of
// the GNU General Public License (See COPYING for details).
// Copyright (C) 2005 Alistair Riddoch
#include <Mercator/ShaderFactory_impl.h>
#include <Mercator/DepthShader.h>
#include <Mercator/FillShader.h>
#include <Mercator/GrassShader.h>
#include <Mercator/ThresholdShader.h>
#include <cassert>
namespace Mercator {
ShaderKit::ShaderKit()
{
}
ShaderKit::~ShaderKit()
{
}
ShaderFactories * ShaderFactories::m_instance = 0;
ShaderFactories::ShaderFactories()
{
m_factories["grass"] = new ShaderFactory<GrassShader>;
m_factories["depth"] = new ShaderFactory<DepthShader>;
m_factories["fill"] = new ShaderFactory<FillShader>;
m_factories["high"] = new ShaderFactory<HighShader>;
m_factories["low"] = new ShaderFactory<LowShader>;
m_factories["band"] = new ShaderFactory<BandShader>;
}
ShaderFactories::~ShaderFactories()
{
}
/// \brief Construct a singleton instance if required.
///
/// @returns a reference to the instance.
ShaderFactories & ShaderFactories::instance()
{
if (m_instance == 0) {
m_instance = new ShaderFactories();
}
return *m_instance;
}
/// \brief Delete the instance
void ShaderFactories::del()
{
if (m_instance != 0) {
delete m_instance;
}
}
/// \brief Create a shader of the specified type.
///
/// @param type a string giving the type of shader.
/// @param params a map of the parameters for the shader
/// @returns a pointer to the new shader object
Shader * ShaderFactories::newShader(const std::string & type,
const Shader::Parameters & params) const
{
FactoryMap::const_iterator I = m_factories.find(type);
if (I == m_factories.end()) {
return 0;
}
assert(I->second != 0);
return I->second->newShader(params);
}
} // namespace Mercator
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