GLScalerFactory.cc

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#include "GLScalerFactory.hh"
#include "GLSimpleScaler.hh"
#include "GLRGBScaler.hh"
#include "GLSaIScaler.hh"
#include "GLScaleNxScaler.hh"
#include "GLTVScaler.hh"
#include "GLHQScaler.hh"
#include "GLHQLiteScaler.hh"
#include "GLContext.hh"
#include "RenderSettings.hh"
#include "unreachable.hh"
#include <memory>
 
namespace openmsx::GLScalerFactory {
 
std::unique_ptr<GLScaler> createScaler(RenderSettings& renderSettings)
{
        GLScaler& fallback = gl::context->getFallbackScaler();
        switch (renderSettings.getScaleAlgorithm()) {
        case RenderSettings::SCALER_SAI:
                // disabled for now:
                //   - it doesn't work (yet) on ATI cards
                //   - it probably has some bugs because (on nvidia cards)
                //     it does not give the same result as the SW SaI scaler,
                //     although it's reasonably close
                //return std::make_unique<GLSaIScaler>();
        case RenderSettings::SCALER_SIMPLE:
                return std::make_unique<GLSimpleScaler>(renderSettings, fallback);
        case RenderSettings::SCALER_RGBTRIPLET:
                return std::make_unique<GLRGBScaler>(renderSettings, fallback);
        case RenderSettings::SCALER_SCALE:
                return std::make_unique<GLScaleNxScaler>(fallback);
        case RenderSettings::SCALER_TV:
                return std::make_unique<GLTVScaler>(renderSettings);
        case RenderSettings::SCALER_HQ:
                return std::make_unique<GLHQScaler>(fallback);
        case RenderSettings::SCALER_MLAA: // fallback
        case RenderSettings::SCALER_HQLITE:
                return std::make_unique<GLHQLiteScaler>(fallback);
        default:
                UNREACHABLE;
        }
        return nullptr; // avoid warning
}
 
} // namespace openmsx::GLScalerFactory