再学 GDI+[97]: TGPImage(17) - 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.

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本例效果图:

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代码文件:

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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:

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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