自制MP3播放器 (TMediaPlayer/BmpShape) 一个自制MP3播放器(含原代码)这

文件名称: 自制MP3播放器 (TMediaPlayer/BmpShape)

所属分类: Delphi

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文件大小: 803kb

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上传时间: 2006-01-13

提供者: che***

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详细说明：一个自制MP3播放器(含原代码)这个程序的关键是BmpShape的应用。unit BmpShape;{2002/08/22 by ultrared根据BMP文件创建窗口注意：1. BMP文件最左上的一个点颜色作为背景色2. BmpShape控件只能用在TForm容器上3. BMP文件可以是256色或者24位色4。大块背景色必须和背景色绝对相等才能获得正常效果}interfaceuses Forms,Windows, Messages, SysUtils, Classes, Controls, ExtCtrls,Graphics;type TBmpShape = class(TImage) private { Private declarations } BackColor:TColor;//背景颜色 FColorDither:boolean;//是否允许背景颜色有一定的抖动 function GetRegion:HRGN;//前景图片的区域 procedure setColorDither(cd:Boolean); protected { Protected declarations } public { Public declarations } c onstructor Create(AOwner:TComponent);override; procedure Apply;//使用效果 published { Published declarations } property Dither:Boolean read FColorDither write setColorDither; end;procedure Register;implementationprocedure Register;begin RegisterComponents('Samples', [TBmpShape]);end;procedure TBmpShape.setColorDither(cd:Boolean);begin if cd<>FColorDither then FColorDither:=cd;end;constructor TBmpShape.Create(AOwner:TComponent);begin inherited Create(AOwner); BackColor:=RGB(0,0,0); FColorDither:=FALSE;end;//核心子程序，获得BMP图片的前景区域function TBmpShape.GetRegion:HRGN;var i,j:integer; rgn1,rgn2:HRGN; StartY:integer; r,g,b,r1,g1,b1:BYTE; cc:TColor;begin if Picture.Bitmap<>nil then begin BackColor:=Picture.Bitmap.Canvas.Pixels[0,0]; rgn1:=CreateRectRgn(0,0,0,0); for i:=0 to Picture.Bitmap.Width-1 do begin StartY:=-1; for j:=0 to Picture.Bitmap.Height-1 do begin cc:=Picture.Bitmap.Canvas.Pixels[i,j]; if FColorDither then begin //允许和背景有一定的色差 r:=(cc and $FF0000) shr 16; g:=(cc and $FF00) shr 8; b:=cc and $FF; r1:=(BackColor and $FF0000) shr 16; g1:=(BackColor and $FF00) shr 8; b1:=BackColor and $FF; if (abs(r-r1)<10) and (abs(g-g1)<10) and (abs(b-b1)<10) then begin if (StartY>=0) and (j>=StartY) then begin rgn2:=CreateRectRgn(i,StartY,i+1,j); CombineRgn(rgn1,rgn1,rgn2,RGN_OR); StartY:=-1; end; end else begin if Starty<0 then StartY:=j else if j=(Picture.Bitmap.Height-1) then //最下面一个点 begin rgn2:=CreateRectRgn(i,StartY,i+1,j); CombineRgn(rgn1,rgn1,rgn2,RGN_OR); end; end; end else //不允许色差 begin if cc=BackColor then begin if (StartY>=0) and (j>=StartY) then begin rgn2:=CreateRectRgn(i,StartY,i+1,j); CombineRgn(rgn1,rgn1,rgn2,RGN_OR); StartY:=-1; end; end else begin if Starty<0 then StartY:=j else if j=(Picture.Bitmap.Height-1) then //最下面一个点 begin rgn2:=CreateRectRgn(i,StartY,i+1,j); CombineRgn(rgn1,rgn1,rgn2,RGN_OR); end; end; end; end; end; result:=rgn1; end else result:=0;end;procedure TBmpShape.Apply;begin if Parent is TForm then begin Left:=0; Top:=0; Width:=Picture.Bitmap.Width; Height:=Picture.Bitmap.Height; with (Parent as Tform) do begin BorderStyle:=bsNone; Width:=Self.Width; Height:=Self.Height; end; SetWindowRgn(Parent.Handle,GetRegion,FALSE); end;end;end. ...展开收缩

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