IG_colorspace_conversion_create_from

This function creates conversion engine based on source and result color space attributes.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_colorspace_conversion_create_from_image( HIGEAR hIGear, enumIGColorSpaceIDs resultSpace, const AT_INT* resultChannelDepths, AT_INT resultChannelCount, LPCAT_COLORSPACE_CONVERSION_OPTIONS options, HIGCSCONVERTER* hCSConverter );

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AT_ERRCOUNT ACCUAPI IG_colorspace_conversion_create_from_image(
        HIGEAR hIGear,
        enumIGColorSpaceIDs resultSpace,
        const AT_INT* resultChannelDepths,
        AT_INT resultChannelCount,
        LPCAT_COLORSPACE_CONVERSION_OPTIONS options,
        HIGCSCONVERTER* hCSConverter
);

Arguments:

Name	Type	Description
hIGear	HIGEAR	HIGEAR handle of image.
resultSpace	enumIGColorSpaceIDs	Color space to which to convert.
resultChannelDepths	const AT_INT*	Array of channel depths in resulting color space.
resultChannelCount	AT_INT	Number of channels in resulting color space.
options	LPCAT_COLORSPACE_CONVERSION_OPTIONS	Conversion options.
hCSConverter	HIGCSCONVERTER*	Handle of color space converter.

Return Value:

Returns the number of ImageGear errors that occurred during this function call. If there are no errors, the return value is IGE_SUCCESS.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.

Sample:

None

Example:

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/* Use the color space converter to convert an image to 24-bit RGB, no alpha or extra channels / AT_ERRCOUNT nErrcount; / Number of errors on stack / HIGCSCONVERTER hCSConv; / Color space converter handle / HIGEAR hImage; / HIGEAR handle of image / AT_INT depths[] = { 8, 8, 8 }; / Result channel depths */ nErrcount = IG_colorspace_conversion_create_from_image( hImage, IG_COLOR_SPACE_ID_RGB, depths, 3, NULL, &hCSConv); nErrcount = IG_colorspace_conversion_apply_to_image( hCSConv, hImage); nErrcount = IG_colorspace_conversion_destroy(hCSConv);

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/* Use the color space converter to convert an image 
   to 24-bit RGB, no alpha or extra channels */
AT_ERRCOUNT nErrcount;  /* Number of errors on stack */
HIGCSCONVERTER hCSConv; /* Color space converter handle */
HIGEAR hImage;          /* HIGEAR handle of image */
AT_INT depths[] = { 8, 8, 8 }; /* Result channel depths */
nErrcount = IG_colorspace_conversion_create_from_image(
    hImage, IG_COLOR_SPACE_ID_RGB, depths, 3, NULL, &hCSConv);
nErrcount = IG_colorspace_conversion_apply_to_image(
    hCSConv, hImage);
nErrcount = IG_colorspace_conversion_destroy(hCSConv);

Remarks:

NULL is an acceptable value for resultChannelDepths. In this case the result channels will be constructed using IG_colorspace_conversion_result_channels_build() routine. The color space attributes are taken from specified hIGear instance. Options controls the conversion flow. You may pass NULL for Options if you don't want to specify any options.

For detailed information about AT_COLORSPACE_CONVERSION_OPTIONS structure and the whole color conversion process, please refer to the section Working with Color Space Conversion Engine.