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再学GDI+[97]: TGPImage(17)
2012-05-31 00:00:00   来源:www.bianceng.cn   评论:0 点击:

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获取GDI+所支持的可编码、可解码的图像格式

其实这和 TGPImage 是没有关系的.

本例效果图:

\

代码文件:unit Unit1;
interface
uses
 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 Dialogs, StdCtrls;
type
 TForm1 = class(TForm)
  Memo1: TMemo;
  procedure FormCreate(Sender: TObject);
 end;
var
 Form1: TForm1;
implementation
{$R *.dfm}
uses GDIPOBJ, GDIPAPI;
procedure TForm1.FormCreate(Sender: TObject);
var
 num, size, i: Cardinal;
 ImageCodecInfo: PImageCodecInfo;
Type
 ArrImageCode = array of TImageCodecInfo;
begin
 Memo1.Clear;
 {获取 GDI+ 可以编码的图像格式:}
 GetImageEncodersSize(num, size);
 GetMem(ImageCodecInfo, size);
 GetImageEncoders(num, size, ImageCodecInfo);
 Memo1.Lines.Add('GDI+ 可以编码的图像格式有:');
 for i := 0 to num - 1 do
  Memo1.Lines.Add(ArrImageCode(ImageCodecInfo)[i].MimeType);
 FreeMem(ImageCodecInfo, size);
 {获取 GDI+ 可以解码的图像格式:}
 GetImageDecodersSize(num, size);
 GetMem(ImageCodecInfo, size);
 GetImageDecoders(num, size, ImageCodecInfo);
 Memo1.Lines.Add('');
 Memo1.Lines.Add('GDI+ 可以解码码的图像格式有:');
 for i := 0 to num - 1 do
  Memo1.Lines.Add(ArrImageCode(ImageCodecInfo)[i].MimeType);
 FreeMem(ImageCodecInfo, size);
end;
end.

窗体文件:object Form1: TForm1
 Left = 0
 Top = 0
 Caption = 'Form1'
 ClientHeight = 251
 ClientWidth = 206
 Color = clBtnFace
 Font.Charset = DEFAULT_CHARSET
 Font.Color = clWindowText
 Font.Height = -11
 Font.Name = 'Tahoma'
 Font.Style = []
 OldCreateOrder = False
 OnCreate = FormCreate
 PixelsPerInch = 96
 TextHeight = 13
 object Memo1: TMemo
  Left = 0
  Top = 0
  Width = 201
  Height = 251
  Align = alLeft
  Lines.Strings = (
   'Memo1')
  ScrollBars = ssBoth
  TabOrder = 0
  ExplicitHeight = 239
 end
end

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