核心提示：unit Unit1;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,...
unit Unit1;interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
const BmpPath = 'C:\Test.bmp'; {测试用图片}
{使用 Canvas.Pixels 属性}
procedure TForm1.Button1Click(Sender: TObject);
var
bit: TBitmap;
clr: TColor;
begin
bit := TBitmap.Create;
bit.LoadFromFile(BmpPath); {载入图片}
clr := bit.Canvas.Pixels[0, 0]; {获取第一像素的颜色值}
ShowMessageFmt('$%.6x', [clr]); {显示为十六进制字符串看看}
//Self.Color := clr; {可用窗体呈现一下}
bit.Free;
end;
{使用 API 函数 GetPixel}
procedure TForm1.Button2Click(Sender: TObject);
var
bit: TBitmap;
clr: TColor;
begin
bit := TBitmap.Create;
bit.LoadFromFile(BmpPath); {载入图片}
clr := GetPixel(bit.Canvas.Handle, 0, 0);{获取第一像素的颜色值}
ShowMessageFmt('$%.6x', [clr]); {显示为十六进制字符串看看}
//Self.Color := clr; {可用窗体呈现一下}
bit.Free;
end;
end.
