Adding Vertical Gradient for fonts

src/engine/image.cpp

@@ -3106,4 +3106,51 @@ namespace fheroes2
             }
         }
     }
+
+    void ApplyVerticalGradient( fheroes2::Image & image, const uint8_t outsideColor, const uint8_t insideColor, const uint8_t borderWidth, const uint8_t borderColor )
+    {
+        const int32_t height = image.height();
+        const int32_t width = image.width();
+
+        uint8_t * inData = image.image();
+        uint8_t * inTransform = image.transform();
+
+        fheroes2::Image outImage;
+        fheroes2::Copy( image, outImage );
+        uint8_t * outData = outImage.image();
+        uint8_t * outTransform = outImage.transform();
+
+        const uint8_t center_y = static_cast<uint8_t>( std::max( 1, ( height / 2 ) - height % 2 ) );
+        const float dColor = (float)( outsideColor - insideColor );
+
+        for ( uint8_t row = 0; row < height; row++ ) {
+            float heightScale = static_cast<float>( abs( center_y - row ) ) / center_y;
+
+            uint8_t val = static_cast<uint8_t>( abs( insideColor + ( heightScale * dColor ) ) );
+            uint8_t * inRowStart = inData + static_cast<ptrdiff_t>( row * width );
+            uint8_t * outRowStart = outData + static_cast<ptrdiff_t>( row * width );
+
+            uint8_t * inRowEnd = inData + static_cast<ptrdiff_t>( ( row + 1 ) * width );
+            uint8_t * inTrans = inTransform + static_cast<ptrdiff_t>( row * width );
+            uint8_t * outTrans = outTransform + static_cast<ptrdiff_t>( row * width );
+
+            for ( ; inRowStart != inRowEnd; ++inRowStart, ++inTrans, ++outRowStart, ++outTrans ) {
+                if ( *inTrans == 0 ) {
+                    // 21 is the pixel limit of shadows in Base white Font
+                    if ( *inRowStart < 21 ) {
+                        *outRowStart = val;
+                    }
+                    else { 
+                        *outTrans = 1;
+                    }
+                }
+            }
+        }
+
+        for ( uint8_t i = 0; i < borderWidth; i++ ) {
+            fheroes2::Sprite cnt = CreateContour( outImage, borderColor );
+            Blit( cnt, outImage );
+        }
+        fheroes2::Copy( outImage, image );
+    }
 }

src/engine/image.h

@@ -1,6 +1,6 @@
 /***************************************************************************
  *   fheroes2: https://github.com/ihhub/fheroes2                           *
- *   Copyright (C) 2020 - 2023                                             *
+ *   Copyright (C) 2020 - 2024                                             *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -318,4 +318,6 @@ namespace fheroes2
     void Transpose( const Image & in, Image & out );
 
     void updateShadow( Image & image, const Point & shadowOffset, const uint8_t transformId, const bool connectCorners );
+
+    void ApplyVerticalGradient( fheroes2::Image & image, const uint8_t outsideColor, const uint8_t insideColor, const uint8_t borderWidth, const uint8_t borderColor );
 }

src/engine/pal.h

@@ -1,6 +1,6 @@
 /***************************************************************************
  *   fheroes2: https://github.com/ihhub/fheroes2                           *
- *   Copyright (C) 2020 - 2022                                             *
+ *   Copyright (C) 2020 - 2024                                             *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -42,6 +42,28 @@ namespace PAL
         CUSTOM
     };
 
+    enum ColorRanges : uint8_t
+    {
+        GRAY_START = 10,
+        GRAY_END = 36,
+        BROWN_START = 37,
+        BROWN_END = 62,
+        BLUE_START = 63,
+        BLUE_END = 84,
+        GREEN_START = 85,
+        GREEN_END = 107,
+        YELLOW_START = 108,
+        YELLOW_END = 130,
+        PURPLE_START = 131,
+        PURPLE_END = 152,
+        CYAN_START = 153,
+        CYAN_END = 174,
+        RED_START = 175,
+        RED_END = 197,
+        ORANGE_START = 198,
+        ORANGE_END = 213
+    };
+
     std::vector<uint8_t> GetCyclingPalette( const uint32_t stepId );
     const std::vector<uint8_t> & GetPalette( const PaletteType type );
     std::vector<uint8_t> CombinePalettes( const std::vector<uint8_t> & first, const std::vector<uint8_t> & second );

src/fheroes2/agg/agg_image.cpp

@@ -2493,6 +2493,87 @@ namespace fheroes2
             case ICN::GRAY_SMALL_FONT:
                 CopyICNWithPalette( id, ICN::SMALFONT, PAL::PaletteType::GRAY_FONT );
                 return true;
+            case ICN::GOLDEN_GRADIENT_FONT: {
+                GetICN( ICN::FONT, 0 );
+                const std::vector<Sprite> & original = _icnVsSprite[ICN::FONT];
+                _icnVsSprite[id].resize( original.size() );
+                for ( size_t i = 0; i < _icnVsSprite[id].size(); ++i ) {
+                    const Sprite & in = original[i];
+                    Sprite & out = _icnVsSprite[id][i];
+                    out.resize( in.width() + 6, in.height() + 6 );
+                    out.reset();
+                    Copy( in, 0, 0, out, 3, 3, in.width(), in.height() );
+                    out.setPosition( in.x() - 2, in.y() - 2 );
+                    ApplyVerticalGradient( out, PAL::ColorRanges::YELLOW_END - 4, PAL::ColorRanges::YELLOW_START, 1, PAL::ColorRanges::BROWN_START + 18 );
+
+                    const fheroes2::Sprite contourBlack = CreateContour( out, 0 );
+                    Blit( contourBlack, out );
+                    const fheroes2::Sprite contourGray = CreateContour( out, 62 );
+                    Blit( contourGray, out );
+                }
+                return true;
+            }
+            case ICN::GOLDEN_GRADIENT_LARGE_FONT: {
+                GetICN( ICN::WHITE_LARGE_FONT, 0 );
+                const std::vector<Sprite> & original = _icnVsSprite[ICN::WHITE_LARGE_FONT];
+                _icnVsSprite[id].resize( original.size() );
+                for ( size_t i = 0; i < _icnVsSprite[id].size(); ++i ) {
+                    const Sprite & in = original[i];
+                    Sprite & out = _icnVsSprite[id][i];
+                    out.resize( in.width() + 6, in.height() + 6 );
+                    out.reset();
+                    Copy( in, 0, 0, out, 3, 3, in.width(), in.height() );
+                    out.setPosition( in.x() - 2, in.y() - 2 );
+                    ApplyVerticalGradient( out, PAL::ColorRanges::YELLOW_END - 4, PAL::ColorRanges::YELLOW_START, 1, PAL::ColorRanges::BROWN_START + 18 );
+
+                    const fheroes2::Sprite contourBlack = CreateContour( out, 0 );
+                    Blit( contourBlack, out );
+                    const fheroes2::Sprite contourGray = CreateContour( out, 62 );
+                    Blit( contourGray, out );
+                }
+                return true;
+            }
+            case ICN::SILVER_GRADIENT_FONT: {
+                GetICN( ICN::FONT, 0 );
+                const std::vector<Sprite> & original = _icnVsSprite[ICN::FONT];
+                _icnVsSprite[id].resize( original.size() );
+                for ( size_t i = 0; i < _icnVsSprite[id].size(); ++i ) {
+                    const Sprite & in = original[i];
+                    Sprite & out = _icnVsSprite[id][i];
+                    out.resize( in.width() + 6, in.height() + 6 );
+                    out.reset();
+                    Copy( in, 0, 0, out, 3, 3, in.width(), in.height() );
+                    out.setPosition( in.x() - 2, in.y() - 2 );
+                    ApplyVerticalGradient( out, PAL::ColorRanges::GRAY_END - 5, PAL::ColorRanges::GRAY_START, 1, PAL::ColorRanges::GRAY_END - 7 );
+
+                    const fheroes2::Sprite contourBlack = CreateContour( out, 0 );
+                    Blit( contourBlack, out );
+                    const fheroes2::Sprite contourBlack2 = CreateContour( out, 0 );
+                    Blit( contourBlack2, out );
+                }
+                return true;
+            }
+            case ICN::SILVER_GRADIENT_LARGE_FONT: {
+                GetICN( ICN::WHITE_LARGE_FONT, 0 );
+                const std::vector<Sprite> & original = _icnVsSprite[ICN::WHITE_LARGE_FONT];
+                _icnVsSprite[id].resize( original.size() );
+                for ( size_t i = 0; i < _icnVsSprite[id].size(); ++i ) {
+                    const Sprite & in = original[i];
+                    Sprite & out = _icnVsSprite[id][i];
+                    out.resize( in.width() + 6, in.height() + 6 );
+                    out.reset();
+                    Copy( in, 0, 0, out, 3, 3, in.width(), in.height() );
+                    out.setPosition( in.x() - 2, in.y() - 2 );
+                    ApplyVerticalGradient( out, PAL::ColorRanges::GRAY_START + 16, PAL::ColorRanges::GRAY_START, 1, PAL::ColorRanges::GRAY_END - 7 );
+
+                    const fheroes2::Sprite contourBlack = CreateContour( out, 0 );
+                    Blit( contourBlack, out );
+                    const fheroes2::Sprite contourBlack2 = CreateContour( out, 0 );
+                    Blit( contourBlack2, out );
+                }
+                return true;
+            }
+
             case ICN::SPELLS:
                 LoadOriginalICN( id );
                 if ( _icnVsSprite[id].size() != 60 ) {
@@ -4998,6 +5079,10 @@ namespace fheroes2
                     return GetICN( ICN::GRAY_FONT, character - 0x20 );
                 case FontColor::YELLOW:
                     return GetICN( ICN::YELLOW_FONT, character - 0x20 );
+                case FontColor::GOLDEN_GRADIENT:
+                    return GetICN( ICN::GOLDEN_GRADIENT_FONT, character - 0x20 );
+                case FontColor::SILVER_GRADIENT:
+                    return GetICN( ICN::SILVER_GRADIENT_FONT, character - 0x20 );
                 default:
                     // Did you add a new font color? Add the corresponding logic for it!
                     assert( 0 );
@@ -5008,6 +5093,10 @@ namespace fheroes2
                 switch ( fontType.color ) {
                 case FontColor::WHITE:
                     return GetICN( ICN::WHITE_LARGE_FONT, character - 0x20 );
+                case FontColor::GOLDEN_GRADIENT:
+                    return GetICN( ICN::GOLDEN_GRADIENT_LARGE_FONT, character - 0x20 );
+                case FontColor::SILVER_GRADIENT:
+                    return GetICN( ICN::SILVER_GRADIENT_LARGE_FONT, character - 0x20 );
                 default:
                     // Did you add a new font color? Add the corresponding logic for it!
                     assert( 0 );

src/fheroes2/agg/icn.h

@@ -938,7 +938,12 @@ namespace ICN
         UNIFORM_GOOD_EXIT_BUTTON,
         UNIFORM_EVIL_EXIT_BUTTON,
 
+        GOLDEN_GRADIENT_FONT,
+        SILVER_GRADIENT_FONT,
+
         WHITE_LARGE_FONT,
+        GOLDEN_GRADIENT_LARGE_FONT,
+        SILVER_GRADIENT_LARGE_FONT,
         SWAP_ARROW_LEFT_TO_RIGHT,
         SWAP_ARROW_RIGHT_TO_LEFT,
 

src/fheroes2/gui/ui_font.cpp

@@ -1,6 +1,6 @@
 /***************************************************************************
  *   fheroes2: https://github.com/ihhub/fheroes2                           *
- *   Copyright (C) 2022 - 2023                                             *
+ *   Copyright (C) 2022 - 2024                                             *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -5791,6 +5791,10 @@ namespace fheroes2
         icnVsSprite[ICN::GRAY_FONT].clear();
         icnVsSprite[ICN::GRAY_SMALL_FONT].clear();
         icnVsSprite[ICN::WHITE_LARGE_FONT].clear();
+        icnVsSprite[ICN::GOLDEN_GRADIENT_FONT].clear();
+        icnVsSprite[ICN::GOLDEN_GRADIENT_LARGE_FONT].clear();
+        icnVsSprite[ICN::SILVER_GRADIENT_FONT].clear();
+        icnVsSprite[ICN::SILVER_GRADIENT_LARGE_FONT].clear();
     }
 
     bool isAlphabetSupported( const SupportedLanguage language )

src/fheroes2/gui/ui_text.h

@@ -1,6 +1,6 @@
 /***************************************************************************
  *   fheroes2: https://github.com/ihhub/fheroes2                           *
- *   Copyright (C) 2021 - 2023                                             *
+ *   Copyright (C) 2021 - 2024                                             *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
@@ -43,7 +43,9 @@ namespace fheroes2
     {
         WHITE,
         GRAY,
-        YELLOW
+        YELLOW,
+        GOLDEN_GRADIENT,
+        SILVER_GRADIENT,
     };
 
     struct FontType