File indexing completed on 2025-01-05 03:58:43

 // 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