Converts Dots Per Inch (DPI) to Pels Per Meter (PPM).
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LONG ACCUAPI IG_convert_DPI_to_PPM( LONG lDotsPerInch ); |
Name | Type | Description |
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lDotsPerInch | LONG | A variable of type LONG, holding the DPI value that can be converted to PPM (pels per meter). |
Returns a LONG indicating the pels per meter of an image.
This function does not process image pixels.
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LONG IPpm, IDpi; ... IPpm=IG_convert_DPI_to_PPM(IPpi); ... |
"Pels" is an abbreviated term for pixels. This function can be useful when you are converting a file that supports dots per inch to a DIB format, which supports pels per meter. The header structure of a DIB (the BIMAPINFOHEADER) contains two fields whose values are defined in "pels per meter": LONG biXPelsPerMeter and LONG biYPelsPerMeter.