table of contents
Image::Info::BMP(3pm) | User Contributed Perl Documentation | Image::Info::BMP(3pm) |
NAME¶
Image::Info::BMP - Windows Device Independent 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 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.
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, but the filesize does not match the internally stored value.
BUGS¶
The current implementation only functions 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.
2024-02-01 | perl v5.38.2 |