/*  SPDX-License-Identifier: GPL-2.0-or-later */
/*!********************************************************************

  Audacity: A Digital Audio Editor

  WavePaintParameters.h

  Dmitry Vedenko

**********************************************************************/
#pragma once

#include "graphics/Color.h"

class Envelope;

//! Pair of colors for waveform painting
struct WAVE_TRACK_PAINT_API ColorPair final
{
   //! Color for the normal state
   graphics::Color Normal;
   //! Color for the selected state
   graphics::Color Selected;

   friend WAVE_TRACK_PAINT_API bool
   operator==(const ColorPair& lhs, const ColorPair& rhs) noexcept;
   friend WAVE_TRACK_PAINT_API bool
   operator!=(const ColorPair& lhs, const ColorPair& rhs) noexcept;
};

//! Parameters for the waveform painting
struct WAVE_TRACK_PAINT_API WavePaintParameters final
{
   //! Attached volume envelope, if any
   const Envelope* AttachedEnvelope { nullptr };

   //! Height of the of clip on screen
   int Height { 0 };


   //! Min value used to clip the output
   double Min { -1.0 };
   //! Max value used to clip the output
   double Max { 1.0 };

   //! Decibel range
   double DBRange { 60.0 };
   //! True, if we paint in dB scale
   bool DBScale { false };

   //! True, if we mark clipped values
   bool ShowClipping { false };

   //! True, if we paint RMS values on top of min and max
   bool ShowRMS { false };

   //! Color outside the waveform area
   graphics::Color BlankColor;
   graphics::Color ZeroLineColor;

   //! Waveform background color
   ColorPair BackgroundColors;
   //! Color of the (min, max) line
   ColorPair SampleColors;
   //! Color of the (-rms, +rms) line
   ColorPair RMSColors;
   //! Color for the columns where clipping has occurred
   ColorPair ClippingColors;

   //! Sets the basic painting parameters
   WavePaintParameters& SetDisplayParameters(int height, double zoomMin, double zoomMax, bool showClipping) noexcept;
   //! Sets the dB scale parameters
   WavePaintParameters& SetDBParameters(double dbRange, bool dbScale) noexcept;
   //! Sets the blank color
   WavePaintParameters& SetBlankColor(graphics::Color color) noexcept;
   //! Sets the horizontal zero line color
   WavePaintParameters& SetZeroLineColor(graphics::Color color) noexcept;
   //! Sets the background colors
   WavePaintParameters& SetBackgroundColors(
      graphics::Color normal, graphics::Color selected) noexcept;
   //! Sets the sample colors
   WavePaintParameters&
   SetSampleColors(graphics::Color normal, graphics::Color selected) noexcept;
   //! Sets the RMS colors
   WavePaintParameters&
   SetRMSColors(graphics::Color normal, graphics::Color selected) noexcept;
   //! Sets the clipping colors
   WavePaintParameters&
   SetClippingColors(graphics::Color normal, graphics::Color selected) noexcept;
   //! Sets volume envelope
   WavePaintParameters& SetEnvelope(const Envelope& envelope) noexcept;
   //! Resets the envelope
   WavePaintParameters& ResetEnvelope() noexcept;
   //! Sets the ShowRMS flag
   WavePaintParameters& SetShowRMS(bool showRMS) noexcept;

   friend WAVE_TRACK_PAINT_API bool operator==(
      const WavePaintParameters& lhs,
      const WavePaintParameters& rhs) noexcept;

   friend WAVE_TRACK_PAINT_API bool operator!=(
      const WavePaintParameters& lhs,
      const WavePaintParameters& rhs) noexcept;
};
