Image::Info::BMP.3pm

Langue: en

Version: 2006-03-03 (fedora - 01/12/10)

Section: 3 (Bibliothèques de fonctions)

NAME

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

SYNOPSIS

  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);
 
 

DESCRIPTION

This modules 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 color available is 2 ^ BitsPerSample.

METHODS

process_file()

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

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

SEE ALSO

Image::Info

NOTES

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;
 
 

DIAGNOSTICS

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

BUGS

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

AUTHOR

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.