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