再学 GDI+[101]: TGPImage(21) - 获取所有编码器的详细信息

本例运行结果:

---

Clsid: {557CF400-1A04-11D3-9A73-0000F81EF32E}
FormatID: {B96B3CAB-0728-11D3-9D7B-0000F81EF32E}
CodecName: Built-in BMP Codec
DllName: 
FormatDescription: BMP
FilenameExtension: *.BMP;*.DIB;*.RLE
MimeType: image/bmp
Flags: 65543
Version: 1
SigCount: 1
SigSize: 2

Clsid: {557CF401-1A04-11D3-9A73-0000F81EF32E}
FormatID: {B96B3CAE-0728-11D3-9D7B-0000F81EF32E}
CodecName: Built-in JPEG Codec
DllName: 
FormatDescription: JPEG
FilenameExtension: *.JPG;*.JPEG;*.JPE;*.JFIF
MimeType: image/jpeg
Flags: 65543
Version: 1
SigCount: 1
SigSize: 2

Clsid: {557CF402-1A04-11D3-9A73-0000F81EF32E}
FormatID: {B96B3CB0-0728-11D3-9D7B-0000F81EF32E}
CodecName: Built-in GIF Codec
DllName: 
FormatDescription: GIF
FilenameExtension: *.GIF
MimeType: image/gif
Flags: 65543
Version: 1
SigCount: 2
SigSize: 6

Clsid: {557CF405-1A04-11D3-9A73-0000F81EF32E}
FormatID: {B96B3CB1-0728-11D3-9D7B-0000F81EF32E}
CodecName: Built-in TIFF Codec
DllName: 
FormatDescription: TIFF
FilenameExtension: *.TIF;*.TIFF
MimeType: image/tiff
Flags: 65543
Version: 1
SigCount: 2
SigSize: 2

Clsid: {557CF406-1A04-11D3-9A73-0000F81EF32E}
FormatID: {B96B3CAF-0728-11D3-9D7B-0000F81EF32E}
CodecName: Built-in PNG Codec
DllName: 
FormatDescription: PNG
FilenameExtension: *.PNG
MimeType: image/png
Flags: 65543
Version: 1
SigCount: 1
SigSize: 8

代码文件:

---

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses GDIPOBJ, GDIPAPI;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Memo1.Align := alLeft;
  Memo1.ScrollBars := ssBoth;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  num, size: Cardinal;
  ImageCodecInfo: PImageCodecInfo;
  i: Integer;
type
  ArrImgCodInfo = array of TImageCodecInfo;
begin
  GetImageEncodersSize(num, size);
  GetMem(ImageCodecInfo, size);
  GetImageEncoders(num, size, ImageCodecInfo);

  Memo1.Clear;
  for i := 0 to num - 1 do with Memo1.Lines do
  begin
    Add(format('Clsid: %s',[GUIDToString(ArrImgCodInfo(ImageCodecInfo)[i].Clsid)]));
    Add(format('FormatID: %s',[GUIDToString(ArrImgCodInfo(ImageCodecInfo)[i].FormatID)]));
    Add(format('CodecName: %s',[ArrImgCodInfo(ImageCodecInfo)[i].CodecName]));
    Add(format('DllName: %s',[ArrImgCodInfo(ImageCodecInfo)[i].DllName]));
    Add(format('FormatDescription: %s',[ArrImgCodInfo(ImageCodecInfo)[i].FormatDescription]));
    Add(format('FilenameExtension: %s',[ArrImgCodInfo(ImageCodecInfo)[i].FilenameExtension]));
    Add(format('MimeType: %s',[ArrImgCodInfo(ImageCodecInfo)[i].MimeType]));
    Add(format('Flags: %d',[ArrImgCodInfo(ImageCodecInfo)[i].Flags]));
    Add(format('Version: %d',[ArrImgCodInfo(ImageCodecInfo)[i].Version]));
    Add(format('SigCount: %d',[ArrImgCodInfo(ImageCodecInfo)[i].SigCount]));
    Add(format('SigSize: %d',[ArrImgCodInfo(ImageCodecInfo)[i].SigSize]));
    Add('');
  end;

  FreeMem(ImageCodecInfo);
end;

end.

窗体文件:

---

object Form1: TForm1
  Left = 0
  Top = 0
  Caption = 'Form1'
  ClientHeight = 206
  ClientWidth = 445
  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 = 8
    Top = 8
    Width = 337
    Height = 145
    Lines.Strings = (
      'Memo1')
    TabOrder = 0
  end
  object Button1: TButton
    Left = 351
    Top = 32
    Width = 75
    Height = 25
    Caption = 'Button1'
    TabOrder = 1
    OnClick = Button1Click
  end
end

Clsid              //获取或设置 Guid 结构，其中包含能识别特定编码解码器的 GUID。 
FormatID           //获取或设置 Guid 结构，其中包含用于识别编码解码器格式的 GUID。 
CodecName          //获取或设置包含编码解码器名称的字符串。 
DllName            //获取或设置包含存放编码解码器的 DLL 的路径名字符串。如果编码解码器不在 DLL 中，则该指针为空。 
FormatDescription  //获取或设置描述编码解码器的文件格式的字符串。 
FilenameExtension  //获取或设置包含编码解码器中使用的文件扩展名的字符串。这些扩展名用分号分隔。 
MimeType           //获取或设置包含编码解码器的多用途网际邮件扩充协议 (MIME) 类型的字符串。
Flags              //获取或设置用于存储有关编码解码器的其他信息的 32 位值。该属性从 ImageCodecFlags 枚举返回若干标志的组合。 
Version            //获取或设置编码解码器的版本号。 
SigMask            //获取或设置可用作筛选器的二维字节数组。 
SigPattern         //获取或设置表示编码解码器签名的二维字节数组。