jvcllaz: Port color component extraction routines in JvJVCLUtils.

git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@8074 8e941d3f-bd1b-0410-a28a-d453659cc2b4

components/jvcllaz/run/JvCore/jvjvclutils.pas

@@ -49,7 +49,7 @@ function IconToBitmap2(Ico: HICON; Size: Integer = 32;
   TransparentColor: TColor = clNone): TBitmap;
 function IconToBitmap3(Ico: HICON; Size: Integer = 32;
   TransparentColor: TColor = clNone): TBitmap;
-
+************)
 // bitmap manipulation functions
 // NOTE: Dest bitmap must be freed by caller!
 // get red channel bitmap
@@ -58,6 +58,8 @@ procedure GetRBitmap(var Dest: TBitmap; const Source: TBitmap);
 procedure GetGBitmap(var Dest: TBitmap; const Source: TBitmap);
 // get blue channel bitmap
 procedure GetBBitmap(var Dest: TBitmap; const Source: TBitmap);
+// get grayscale bitmap
+procedure GetGrayscaleBitmap(var Dest: TBitmap; const Source: TBitmap);
 // get monochrome bitmap
 procedure GetMonochromeBitmap(var Dest: TBitmap; const Source: TBitmap);
 // get hue bitmap (h part of hsv)
@@ -67,6 +69,7 @@ procedure GetSaturationBitmap(var Dest: TBitmap; const Source: TBitmap);
 // get value bitmap (V part of HSV)
 procedure GetValueBitmap(var Dest: TBitmap; const Source: TBitmap);
 
+(*************** NOT CONVERTED
 // hides / shows the a forms caption area
 procedure HideFormCaption(FormHandle: THandle; Hide: Boolean);
 
@@ -866,7 +869,7 @@ function Scale96ToForm(ASize: Integer): Integer;
 implementation
 
 uses
-  sysutils, LCLIntf, GraphType, GraphUtil, Math,
+  sysutils, LCLIntf, GraphType, GraphUtil, FPImage, IntfGraphics, Math,
  {$IFDEF MSWINDOWS}
   CommCtrl,
  {$ENDIF}
@@ -1155,79 +1158,98 @@ begin
 end;
 
 {$ENDIF MSWINDOWS}
+*****************)
 
 type
-  TGetXBitmapMode =(gxRed, gxGreen, gxBlue, gxHue, gxSaturation, gxValue);
+  TGetXBitmapMode =(gxRed, gxGreen, gxBlue, gxHue, gxSaturation, gxValue, gxGrayscale);
 
 procedure GetXBitmap(var Dest: TBitmap; const Source: TBitmap; Mode: TGetXBitmapMode);
 var
-  I, J, H, S, V: Integer;
+  img: TLazIntfImage;
-  {$IFDEF CLR}
+  clr: TFPColor;
-  Line: array of TJvRGBTriple;
+  i, j: Integer;
-  {$ELSE}
+  h, s, v: Double;
-  Line: PJvRGBArray;
-  {$ENDIF CLR}
 begin
   if not Assigned(Dest) then
     Dest := TBitmap.Create;
-  Dest.Assign(Source);
+  img := Source.CreateIntfImage;
-  Dest.PixelFormat := pf24bit;
+  try
-  for J := Dest.Height - 1 downto 0 do
-  begin
-    {$IFDEF CLR}
-    Marshal.PtrToStructure(Dest.ScanLine[J], Line);
-    {$ELSE}
-    Line := Dest.ScanLine[J];
-    {$ENDIF CLR}
     case Mode of
       gxRed:
-        for I := Dest.Width - 1 downto 0 do
+        for j := 0 to img.Height-1 do
+          for i := 0 to img.Width-1 do
           begin
-          Line[I].rgbGreen := 0;
+            clr := img.Colors[i, j];
-          Line[I].rgbBlue := 0;
+            clr.Green := 0;
+            clr.Blue := 0;
+            img.Colors[i, j] := clr;
           end;
       gxGreen:
-        for I := Dest.Width - 1 downto 0 do
+        for j := 0 to img.Height-1 do
+          for i := 0 to img.Width-1 do
           begin
-          Line[I].rgbRed := 0;
+            clr := img.Colors[i, j];
-          Line[I].rgbBlue := 0;
+            clr.Red := 0;
+            clr.Blue := 0;
+            img.Colors[i, j] := clr;
           end;
       gxBlue:
-        for I := Dest.Width - 1 downto 0 do
+        for j := 0 to img.Height-1 do
+          for i := 0 to img.Width-1 do
           begin
-          Line[I].rgbRed := 0;
+            clr := img.Colors[i, j];
-          Line[I].rgbGreen := 0;
+            clr.Red := 0;
+            clr.Green := 0;
+            img.Colors[i, j] := clr;
           end;
       gxHue:
-        for I := Dest.Width - 1 downto 0 do
+        for j := 0 to img.Height-1 do
-          with Line[I] do
+          for i := 0 to img.Width-1 do
           begin
-            RGBToHSV(rgbRed, rgbGreen, rgbBlue, H, S, V);
+            clr := img.Colors[i, j];
-            rgbRed := H;
+            ColorToHSV(FPColorToTColor(clr), h, s, v);
-            rgbGreen := H;
+            clr.Red := round(h*65535);
-            rgbBlue := H;
+            clr.Green := clr.Red;
+            clr.Blue := clr.Red;
+            img.Colors[i, j] := clr;
           end;
       gxSaturation:
-        for I := Dest.Width - 1 downto 0 do
+        for j := 0 to img.Height-1 do
-          with Line[I] do
+          for i := 0 to img.Width-1 do
           begin
-            RGBToHSV(rgbRed, rgbGreen, rgbBlue, H, S, V);
+            clr := img.Colors[i, j];
-            rgbRed := S;
+            ColorToHSV(FPColorToTColor(clr), h, s, v);
-            rgbGreen := S;
+            clr.Red := round(s*65535);
-            rgbBlue := S;
+            clr.Green := clr.Red;
+            clr.Blue := clr.Red;
+            img.Colors[i, j] := clr;
           end;
       gxValue:
-        for I := Dest.Width - 1 downto 0 do
+        for j := 0 to img.Height-1 do
-          with Line[I] do
+          for i := 0 to img.Width-1 do
           begin
-            RGBToHSV(rgbRed, rgbGreen, rgbBlue, H, S, V);
+            clr := img.Colors[i, j];
-            rgbRed := V;
+            ColorToHSV(FPColorToTColor(clr), h, s, v);
-            rgbGreen := V;
+            clr.Red := round(v*65535);
-            rgbBlue := V;
+            clr.Green := clr.Red;
+            clr.Blue := clr.Red;
+            img.Colors[i, j] := clr;
+          end;
+      gxGrayscale:
+        for j := 0 to img.Height-1 do
+          for i := 0 to img.Width-1 do
+          begin
+            clr := img.Colors[i, j];
+            clr.Red := (Int64(clr.Red) + clr.Green + clr.Blue) div 3;
+            clr.Green := clr.Red;
+            clr.Blue := clr.Red;
+            img.Colors[i, j] := clr;
           end;
     end;
+    Dest.LoadFromIntfImage(img);
+  finally
+    img.Free;
   end;
-  Dest.PixelFormat := Source.PixelFormat;
 end;
 
 procedure GetRBitmap(var Dest: TBitmap; const Source: TBitmap);
@@ -1245,6 +1267,11 @@ begin
   GetXBitmap(Dest, Source, gxGreen);
 end;
 
+procedure GetGrayscaleBitmap(var Dest: TBitmap; const Source: TBitmap);
+begin
+  GetXBitmap(Dest, source, gxGrayscale);
+end;
+
 procedure GetMonochromeBitmap(var Dest: TBitmap; const Source: TBitmap);
 begin
   if not Assigned(Dest) then
@@ -1268,7 +1295,7 @@ begin
   GetXBitmap(Dest, Source, gxValue);
 end;
 
-
+(******************* NOT CONVERTED ****
 { (rb) Duplicate of JvAppUtils.AppTaskbarIcons }
 
 procedure HideFormCaption(FormHandle: THandle; Hide: Boolean);