BlendingAlgorithms.h

// SPDX-FileCopyrightText: 2010 Jens-Michael Hoffmann <jmho@c-xx.com>
//
// SPDX-License-Identifier: LGPL-2.1-or-later
 
#ifndef MARBLE_BLENDING_ALGORITHMS_H
#define MARBLE_BLENDING_ALGORITHMS_H
 
#include <QtGlobal>
 
#include "Blending.h"
 
namespace Marble
{
 
class OverpaintBlending : public Blending
{
public:
    void blend(QImage *const bottom, TextureTile const *const top) const override;
};
 
class IndependentChannelBlending : public Blending
{
public:
    void blend(QImage *const bottom, TextureTile const *const top) const override;
 
private:
    // bottomColorIntensity: intensity of one color channel (of one pixel) of the bottom image
    // topColorIntensity: intensity of one color channel (of one pixel) of the top image
    // return: intensity of the color channel (of a given pixel) of the result image
    // all color intensity values are in the range 0..1
    virtual qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const = 0;
};
 
// Neutral blendings
 
class AllanonBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class ArcusTangentBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class GeometricMeanBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class LinearLightBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class NoiseBlending : public Blending // or IndependentChannelBlending?
{
};
 
class OverlayBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class ParallelBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class TextureBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
// Darkening blendings
 
class ColorBurnBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class DarkBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class DarkenBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class DivideBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class GammaDarkBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class LinearBurnBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class MultiplyBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class SubtractiveBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
// Lightening blendings
 
class AdditiveBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class ColorDodgeBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class GammaLightBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class HardLightBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class LightBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class LightenBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class PinLightBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class ScreenBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class SoftLightBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class VividLightBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
// Inverter blendings
 
class AdditiveSubtractiveBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class BleachBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class DifferenceBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class EquivalenceBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
class HalfDifferenceBlending : public IndependentChannelBlending
{
    qreal blendChannel(qreal const bottomColorIntensity, qreal const topColorIntensity) const override;
};
 
// Special purpose blendings
 
class CloudsBlending : public Blending
{
public:
    void blend(QImage *const bottom, TextureTile const *const top) const override;
};
 
class GrayscaleBlending : public Blending
{
public:
    void blend(QImage *const bottom, TextureTile const *const top) const override;
};
 
class InvertColorBlending : public Blending
{
public:
    void blend(QImage *const bottom, TextureTile const *const top) const override;
};
 
class InvertHueBlending : public Blending
{
public:
    void blend(QImage *const bottom, TextureTile const *const top) const override;
};
 
}
 
#endif