IEFileTypeSupportsPixelFormat

Declaration

procedure IEFileTypeSupportsPixelFormat(ImageFormat: TIOFileType; Compression: Integer; PixelFormat: TIEPixelFormat; HasAlphaChannel: Boolean;
                                        out ExpectedPixelFormat: TIEPixelFormat; out SupportsAlpha: Boolean);

Description

Checks whether an image type (e.g. ioTIFF) and Compression (e.g. ord(ioTIFF_JPEG) supports a specified pixel format and alpha channel.
Compression should be an ord() of a one of the following compression properties:
◼ioDICOM: DICOM_Compression
◼ioIEN: IEN_Compression
◼ioTIFF: TIFF_Compression
◼ioPDF: PDF_Compression
◼ioJ2K, ioJP2: J2000_ColorSpace
◼ioBMP: BMP_Compression
◼ioICO: ICO_Format

Note:
◼This method also considers the active engine for that file type, e.g. PNGEngine
◼You must add the iexHelperFunctions unit to your uses clause
◼For ioBMP it assumes BMP_HandleTransparency = True

Example

// Can we save the current image to TIFF 48bit?
IEFileTypeSupportsPixelFormat( ioTIFF, ord(ImageEnView.IO.Params.TIFF_Compression), ie48RGB, ImageEnView.IEBitmap.HasAlphaChannel, expectedPixelFormat, supportsAlpha );
// supportsPixelFormat will be ie48RGB if this format supports ie48RGB, otherwise it will be the likely alternative format
// supportsAlpha will be true if this format supports an alpha channel

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