Delphi编程分割图片的方法

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最新推荐文章于 2024-11-23 15:01:58 发布

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原文链接：http://www.cnblogs.com/hssbsw/archive/2012/06/07/2540882.html

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Delphi切割图片,Delphi图片分割
这个例子是把一张图片平均分成了 4 份, 顺序是: 左、右、上、下; 没使用循环操作, 显得有点笨, 但容易理解.
unit Unit1;

interface

uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;

type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm} procedure TForm1.Button1Click(Sender: TObject);
const
path = 'c:\temp\test.bmp';
{ 先准备好测试图片 } var
bit: TBitmap;
bits: array [0 .. 3] of TBitmap;
{ 假如分成 4 份 } i, w, h: Integer;
begin
bit := TBitmap.Create;
bit.LoadFromFile(path);
w := bit.Width div 2;
h := bit.Height div 2;
for i := 0 to 3 do
begin
    bits[i] := TBitmap.Create;
    bits[i].SetSize(w, h);
end;
BitBlt(bits[0].Canvas.Handle, 0, 0, w, h, bit.Canvas.Handle, 0, 0, SRCCOPY);
BitBlt(bits[1].Canvas.Handle, 0, 0, w, h, bit.Canvas.Handle, w, 0, SRCCOPY);
BitBlt(bits[2].Canvas.Handle, 0, 0, w, h, bit.Canvas.Handle, 0, h, SRCCOPY);
BitBlt(bits[3].Canvas.Handle, 0, 0, w, h, bit.Canvas.Handle, w, h, SRCCOPY);
for i := 0 to 3 do
begin
    bits[i].SaveToFile(ChangeFileExt(path, Format('.%.3d.bmp', [i + 1])));
    bits[i].Free;
end;
bit.Free;
end;