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103 lines
2.7 KiB
ObjectPascal
103 lines
2.7 KiB
ObjectPascal
{
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Double Commander
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-------------------------------------------------------------------------
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Graphic functions
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Copyright (C) 2013-2017 Alexander Koblov (alexx2000@mail.ru)
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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}
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unit uGraphics;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, Graphics, Controls;
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type
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{ TImageListHelper }
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TImageListHelper = class helper for TImageList
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public
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procedure LoadThemeIcon(Index: Integer; const AIconName: String);
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end;
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procedure BitmapAssign(Bitmap: TBitmap; Image: TRasterImage);
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procedure BitmapAlpha(var ABitmap: TBitmap; APercent: Single);
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implementation
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uses
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GraphType, FPimage, IntfGraphics, uPixMapManager;
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type
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TRawAccess = class(TRasterImage) end;
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procedure BitmapAssign(Bitmap: TBitmap; Image: TRasterImage);
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var
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RawImage: PRawImage;
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begin
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RawImage:= TRawAccess(Image).GetRawImagePtr;
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// Simply change raw image owner without data copy
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Bitmap.LoadFromRawImage(RawImage^, True);
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// Set image data pointer to nil, so it will not free double
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RawImage^.ReleaseData;
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end;
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procedure BitmapAlpha(var ABitmap: TBitmap; APercent: Single);
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var
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X, Y: Integer;
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Color: TFPColor;
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AImage: TLazIntfImage;
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begin
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if ABitmap.RawImage.Description.AlphaPrec <> 0 then
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begin
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AImage:= ABitmap.CreateIntfImage();
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for X:= 0 to AImage.Width - 1 do
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begin
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for Y:= 0 to AImage.Height - 1 do
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begin
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Color:= AImage.Colors[X, Y];
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Color.Alpha:= Round(Color.Alpha * APercent);
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AImage.Colors[X, Y]:= Color;
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end;
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end;
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ABitmap.LoadFromIntfImage(AImage);
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AImage.Free;
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end;
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end;
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{ TImageListHelper }
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procedure TImageListHelper.LoadThemeIcon(Index: Integer; const AIconName: String);
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var
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ABitmap: TBitmap;
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begin
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ABitmap:= PixMapManager.GetThemeIcon(AIconName, Self.Width);
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if (ABitmap = nil) then ABitmap:= TBitmap.Create;
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if (Index < Count) then
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Self.Replace(Index, ABitmap , nil)
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else begin
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Self.Insert(Index, ABitmap , nil)
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end;
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ABitmap.Free;
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end;
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end.
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