MakeImageGrayScale
IPDFDocument3 :: General document methods

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This method converts image colors to shades of gray.

Syntax

HRESULT MakeImageGrayScale (
LONG imageIndex
)
Parameters
imageIndex
Index of the image

Return value
If successful, this method returns S_OK. If it fails, this method should return one of the error values.

Remarks

The index of the image can be retrieved from any image loading method, such as AddImageFromFile.

Equivalent in new interface: IPDFDocument4::TransformImage.

Example

How to Make an Image Gray

Delphi
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{ PDF object is supposed to be created }
PDF.BeginDoc;
j := PDF.AddImageFromFile('picture.jpg');
PDF.MakeImageGrayScale(j);
PDF.PDFPAGE_ShowImage(j, 200, 0, 122, 89, 0);
PDF.EndDoc;
C/C++
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// PDF object is supposed to be created
PDF->BeginDoc();
LONG j = PDF->AddImageFromFile("picture.jpg");
PDF->MakeImageGrayScale(j);
PDF->PDFPAGE_ShowImage(j, 200, 0, 122, 89, 0);
PDF->EndDoc();
C#
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// PDF object is supposed to be created
PDF.BeginDoc();
long j = PDF.AddImageFromFile("picture.jpg");
PDF.MakeImageGrayScale(j);
PDF.PDFPAGE_ShowImage(j, 200, 0, 122, 89, 0);
PDF.EndDoc();
Visual Basic
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' PDF object is supposed to be created
PDF.BeginDoc
j = PDF.AddImageFromFile("picture.jpg")
PDF.MakeImageGrayScale j
PDF.PDFPAGE_ShowImage j, 200, 0, 122, 89, 0
PDF.EndDoc

See Also

Reference
General document methods