Image::Info::BMP(3) User Contributed Perl Documentation Image::Info::BMP(3)

Image::Info::BMP - Windows Device Independent Bitmap support for Image::Info

use Image::Info qw(image_info dim);

my $info = image_info("image.bmp");
if (my $error = $info->{error}) {
    die "Can't parse image info: $error\n";
}
my $color = $info->{color_type};

my($w, $h) = dim($info);

This module supplies the standard key names except for Gamma, Interlace, LastModificationTime, as well as:
BMP_ColorsImportant
Specifies the number of color indexes that are required for displaying the bitmap. If this value is zero, all colors are required.
BMP_Origin
If true the bitmap is a bottom-up DIB and its origin is the lower-left corner. Otherwise, the bitmap is a top-down DIB and its origin is the upper-left corner.
ColorPalette
Reference to an array of all colors used. This key is only present if "image_info" is invoked as "image_info($file, ColorPalette=>1)".
ColorTableSize
The number of colors the image uses. If 0 then this is a true color image. The number of colors available is 2 ^ BitsPerSample.

$info->process_file($source, $options);

Processes one file and sets the found info fields in the $info object.

Image::Info

For more information about BMP see http://msdn.microsoft.com.

Random notes:

warn if height is negative and compress is not RGB or BITFILEDS (0 or 3)
ICO and CUR support?
### v5
If bit depth is 0, it relies upon underlying JPG/PNG :-(
Extra Information
  DWORD        bV5RedMask; 
  DWORD        bV5GreenMask; 
  DWORD        bV5BlueMask; 
  DWORD        bV5AlphaMask; 
  DWORD        bV5CSType; 
  CIEXYZTRIPLE bV5EndPoints; #3*CIEXYZ #CIEXYZ = 3*FXPT2DOT30#FXPT2DOT30 = long
  DWORD        bV5GammaRed; 
  DWORD        bV5GammaGreen; 
  DWORD        bV5GammaBlue; 
  DWORD        bV5Intent; 
  DWORD        bV5ProfileData; 
  DWORD        bV5ProfileSize;

Size mismatch
The image may be correct, but the filesize does not match the internally stored value.

The current implementation only functions on little-endian architectures. Consequently erroneous data concerning compression (including file_ext and file_mime_type) may be reported.

Jerrad Pierce <belg4mit@mit.edu>/<webmaster@pthbb.org>

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

2021-05-24 perl v5.34.0