delphi - 如何在 Delphi 2010 中更改 TWICImage 的像素格式-6ren

delphi - 如何在 Delphi 2010 中更改 TWICImage 的像素格式

转载作者：行者123 更新时间：2023-12-03 14:33:48

我有一个 TWicImage、IWicBitmap 和一个 IWicBitmapSource，它们可以很好地显示所有支持的图形文件格式，允许旋转、水平翻转、垂直翻转、缩放和剪切。所有这些似乎都运行良好，我可以获得 WicImages 像素格式，但我不知道如何更改或设置 TWicImage 的像素格式。

我创建了一个对话框来返回 WICPixelFormatGUID 以用作转换的像素格式。

任何人都可以分享一些代码来演示如何使用 IWICColorTransform 或其他 Wincodec 方法更改 WicImage 的像素格式吗？

比尔

现在已经是 2011 年中期了...对于那些可能想知道的人来说，我尝试过这个，它似乎有效(它使用 Developer Express 的 TcxImage，但我怀疑 TImage 也可以工作):

procedure TForm1.N16bitBGR1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat16bppBGR555, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N16bitGray1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat16bppGray, WICBitmapDitherTypeSolid, nil, 0,
        WICBitmapPaletteTypeFixedGray16 );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N24bitGBB1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat24bppBGR, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N2bitIndexed1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat2bppIndexed, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N32bitGray1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat32bppGrayFloat, WICBitmapDitherTypeSolid, nil, 0,
        WICBitmapPaletteTypeFixedGray256 );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N32bitGRBA1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat32bppPBGRA, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N4bitIndexed1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat4bppIndexed, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N8bitGray1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat8bppGray, WICBitmapDitherTypeSolid, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N8bitIndexed1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat8bppIndexed, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeFixedGray256 );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

最佳答案

Bummi 和 Warren P 要求我发布我之前添加的答案。答案如下:

对于那些可能想知道的人，我尝试了这个，它似乎有效(它使用 Developer Express 的 TcxImage，但我怀疑 TImage 也可以工作):

procedure TForm1.N16bitBGR1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat16bppBGR555, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N16bitGray1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat16bppGray, WICBitmapDitherTypeSolid, nil, 0,
        WICBitmapPaletteTypeFixedGray16 );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N24bitGBB1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat24bppBGR, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N2bitIndexed1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat2bppIndexed, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N32bitGray1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat32bppGrayFloat, WICBitmapDitherTypeSolid, nil, 0,
        WICBitmapPaletteTypeFixedGray256 );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N32bitGRBA1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat32bppPBGRA, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N4bitIndexed1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat4bppIndexed, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N8bitGray1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat8bppGray, WICBitmapDitherTypeSolid, nil, 0,
        WICBitmapPaletteTypeMedianCut );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

procedure TForm1.N8bitIndexed1Click( Sender: TObject );
var
  wicImg: TWICImage;
  wicBitmap: IWICBitmap;
  iBmpSource: IWICBitmapSource;
  puiWidth, puiHeight: UINT;
  iConverter: IWICFormatConverter;
begin
  if cxImage1.Picture.Graphic is TWICImage then
  begin
    Screen.Cursor := crHourGlass;
    try
      wicImg := TWICImage( cxImage1.Picture.Graphic );
      wicImg.ImagingFactory.CreateFormatConverter( iConverter );
      iBmpSource := wicImg.Handle as IWICBitmapSource;
      iBmpSource.GetSize( puiWidth, puiHeight );
      iConverter.Initialize( iBmpSource, GUID_WICPixelFormat8bppIndexed, WICBitmapDitherTypeNone, nil, 0,
        WICBitmapPaletteTypeFixedGray256 );
      wicImg.ImagingFactory.CreateBitmapFromSourceRect( iConverter, 0, 0, puiWidth, puiHeight, wicBitmap );
      if Assigned( wicBitmap ) then
        wicImg.Handle := wicBitmap;
      cxImage1.Repaint;
      cxImage1.Update;
      cxImage1.Invalidate;
      dxStatusBar1.Panels[ 0 ].Text := ExtractFileDir( AFilename );
      dxStatusBar1.Panels[ 1 ].Text := ExtractFileName( AFilename );
      dxStatusBar1.Panels[ 2 ].Text := 'Width: ' + IntToStr( WICImageWidth( cxImage1 ) );
      dxStatusBar1.Panels[ 3 ].Text := 'Height: ' + IntToStr( WICImageHeight( cxImage1 ) );
      dxStatusBar1.Panels[ 4 ].Text := 'Pixel Format: ' + WICGetPixelFormat( cxImage1 );
    finally
      Screen.Cursor := crDefault;
    end;
  end;
end;

关于delphi - 如何在 Delphi 2010 中更改 TWICImage 的像素格式，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2569230/

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delphi - 如何在 Delphi 2010 中更改 TWICImage 的像素格式