Number of columns in the image. 0x0100 ∙ 256
IG_ISIS_TAG_IMAGEWIDTH contains the number of columns of pixels (width) in an image.
Type:
IG_ISIS_TAG_TYPE_LONG
Drivers:
All source and destination drivers, any many compression drivers.
Values:
An integer specifying the number of columns of pixels in the image (View: from 1 to IG_ISIS_TAG_IMAGEWIDTH_MAX).
Tag Dependencies and Dependent Tags:
IG_ISIS_TAG_IMAGEWIDTH is reset to the full width of the page when several other tags are set; therefore the following dependencies must be observed:
IG_ISIS_TAG_PAGESIZE ∙ IG_ISIS_TAG_XRESOLUTION ∙ IG_ISIS_TAG_YRESOLUTION ∙ IG_ISIS_TAG_XPOSITION ∙ IG_ISIS_TAG_YPOSITION ∙ IG_ISIS_TAG_IMAGEWIDTH ∙ IG_ISIS_TAG_IMAGELENGTH
Remarks:
IG_ISIS_TAG_IMAGEWIDTH is required by a number of image viewing applications as well as file writing drivers and any other processes that need to know the number of columns in the image.
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Many scanners can only scan areas with widths that are divisible by eight, or some other number. You must use IG_ISIS_choice_get_long(lpDriver, IG_ISIS_TAG_IMAGEWIDTH, IG_ISIS_CHOICE_STEP, lplValue) to determine the minimum increment. |