QPix Command Reference Image Files

QPx_GetImageFileInfo

QPx_GetImageFileInfo(imagePath; imageWidth; imageHeight; pixelDepth; hRes; vRes):error
imagePath Text Full path to image file
imageWidth Longint Image width in pixels
imageHeight Longint Image height in pixels
pixelDepth Longint Image depth
hRes Longint Horizontal image resolution in dots/inch (dpi)
vRes Longint Vertical image resolution in dots/inch (dpi)
error Longint Error result

Returns the properties of an image file.

The imagePath parameter contains the full pathname to the image file. If imagePath is empty, QPix presents a file selection dialog where the user can preview and select an image file. If the user selects a file, its full pathname is returned in imagePath, otherwise error qpx_userCancelErr is returned.

Image dimensions are returned in imageWidth and imageHeight, horizontal and vertical resolution in hRes and vRes and pixel depth in pixelDepth. Possible values for pixelDepth are:

Black and white images1
Color images2, 8, 16, 24, 32
Grayscale images34 (2 bit), 36 (4-bit), 40 (8-bit)

Example

  `Get image info
C_LONGINT($error)
C_TEXT($imagePath)
C_LONGINT($width;$height;$depth;$hRes;$vRes)
 
$imagePath:="Hard disk:images:people.gif"
 
$error:=QPx_GetImageFileInfo ($imagePath;$width;$height;$depth;$hRes;$vRes)
 
If ($error=qpx_noErr)
   `Work with image info
End if

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