Adds support for fuzzy effect in the icon editor

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@1308 8e941d3f-bd1b-0410-a28a-d453659cc2b4

applications/iconeditor/main.lfm

@@ -1207,14 +1207,55 @@ object MainForm: TMainForm
         Layout = tlCenter
         ParentColor = False
       end
-      object spinFillAlpha: TSpinEdit
-        Left = 504
-        Height = 21
-        Top = 5
-        Width = 51
-        OnChange = spinFillAlphaChange
+      object PanelTolerance1: TPanel
+        Left = 494
+        Height = 34
+        Top = 0
+        Width = 68
+        Align = alLeft
+        BevelOuter = bvNone
+        ClientHeight = 34
+        ClientWidth = 68
         TabOrder = 4
-        Value = 100
+        object spinFillAlpha: TSpinEdit
+          Left = 10
+          Height = 21
+          Top = 5
+          Width = 51
+          OnChange = spinFillAlphaChange
+          TabOrder = 0
+          Value = 100
+        end
+      end
+      object LabelTolerance2: TLabel
+        Left = 562
+        Height = 34
+        Top = 0
+        Width = 34
+        Align = alLeft
+        Caption = 'Fuzzy?'
+        Constraints.MinHeight = 32
+        Layout = tlCenter
+        ParentColor = False
+      end
+      object PanelTolerance2: TPanel
+        Left = 596
+        Height = 34
+        Top = 0
+        Width = 30
+        Align = alLeft
+        BevelOuter = bvNone
+        ClientHeight = 34
+        ClientWidth = 30
+        TabOrder = 5
+        object checkFuzzy: TCheckBox
+          Left = 4
+          Height = 17
+          Top = 9
+          Width = 18
+          OnChange = checkFuzzyChange
+          TabOrder = 0
+        end
       end
     end
   end

applications/iconeditor/main.pas

@@ -41,10 +41,14 @@ type
   { TMainForm }
 
   TMainForm = class(TForm)
+    checkFuzzy: TCheckBox;
     LabelTolerance1: TLabel;
+    LabelTolerance2: TLabel;
     Palette: TColorPalette;
     MenuItemShowGrid: TMenuItem;
     MenuItemShowPreview: TMenuItem;
+    PanelTolerance1: TPanel;
+    PanelTolerance2: TPanel;
     spinFillAlpha: TSpinEdit;
     ViewShowPreview: TAction;
     ViewShowMask: TAction;
@@ -206,6 +210,7 @@ type
     UpDownSize: TUpDown;
     UpDownSize1: TUpDown;
     UpDownTolerance: TUpDown;
+    procedure checkFuzzyChange(Sender: TObject);
     procedure ColorsDisableExecute(Sender: TObject);
     procedure ColorsGrayscaleExecute(Sender: TObject);
     procedure ColorsInvertExecute(Sender: TObject);
@@ -1137,6 +1142,12 @@ begin
   ActivePictureEdit.Disable;
 end;
 
+procedure TMainForm.checkFuzzyChange(Sender: TObject);
+begin
+  if not Pictures.CanEdit then Exit;
+  ActivePictureEdit.Fuzzy := checkFuzzy.Checked;
+end;
+
 procedure TMainForm.EditSizeChange(Sender: TObject);
 begin
   if not Pictures.CanEdit then Exit;

applications/iconeditor/picturectrls.pas

@@ -125,6 +125,7 @@ type
     FFillAndOutline: TDrawMode;
     FFillColor: TColor;
     FFloodFillTolerance: Single;
+    FFuzzy: Boolean;
     FMaskTool: TMaskTool;
     FModified: Boolean;
     FOnChange: TNotifyEvent;
@@ -213,7 +214,8 @@ type
     property Size: Integer read FSize write FSize;
     property Tool: TPictureEditTool read FTool write SetTool;
     property FillAlpha: Integer read FFillAlpha write FFillAlpha;
-    
+    property Fuzzy: Boolean read FFuzzy write FFuzzy;
+
     property Modified: Boolean read FModified;
     property OnChange: TNotifyEvent read FOnChange write FOnChange;
     property OnColorChange: TNotifyEvent read FOnColorChange write FOnColorChange;
@@ -845,7 +847,17 @@ begin
   BeginDraw;
   if not (ssLeft in Shift) then Picture.Canvas.EraseMode := ermErase;
   try
-    Picture.Canvas.AlphaRectangle(X1, Y1, X2, Y2, FFillAlpha);
+    if FFuzzy then
+    begin
+      Picture.Canvas.FuzzyRectangle(X1, Y1, X2, Y2);
+    end
+    else
+    begin
+      if FFillAlpha = 100 then
+        Picture.Canvas.Rectangle(X1, Y1, X2, Y2)
+      else
+        Picture.Canvas.AlphaRectangle(X1, Y1, X2, Y2, FFillAlpha);
+    end;
   finally
     Picture.Canvas.EraseMode := ermNone;
     EndDraw;

components/rgbgraphics/rgbgraphics.pas

@@ -154,6 +154,8 @@ type
     procedure MaskFloodFill(X, Y: Integer);
     // Alpha drawing methods
     procedure AlphaRectangle(X1, Y1, X2, Y2, AAlpha: Integer);
+    // Effect drawing methods
+    procedure FuzzyRectangle(X1, Y1, X2, Y2: Integer);
   public
     procedure DrawTo(ACanvas: TCanvas; X, Y: Integer);
     procedure StretchDrawTo(ACanvas: TCanvas; DstX, DstY, DstWidth, DstHeight: Integer);
@@ -805,6 +807,19 @@ begin
     end;
 end;
 
+procedure TRGB32Canvas.FuzzyRectangle(X1, Y1, X2, Y2: Integer);
+var
+  X, Y: LongInt;
+  delta: Integer;
+begin
+  for Y := Y1 + 5 to Y2 - 5 do
+    for X := X1 + 5 to X2 - 5 do
+    begin
+      delta := X mod 5;
+      SetColor(X, Y, GetColor(X - delta, Y - delta));
+    end;
+end;
+
 procedure TRGB32Canvas.DrawTo(ACanvas: TCanvas; X, Y: Integer);
 begin
   if ACanvas <> nil then