Image::Info::BMP(3pm)

1Image::Info::BMP(3)   User Contributed Perl Documentation  Image::Info::BMP(3)
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NAME

6       Image::Info::BMP - Windows Device Independent Bitmap support for
7       Image::Info
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SYNOPSIS

10        use Image::Info qw(image_info dim);
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12        my $info = image_info("image.bmp");
13        if (my $error = $info->{error}) {
14            die "Can't parse image info: $error\n";
15        }
16        my $color = $info->{color_type};
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18        my($w, $h) = dim($info);
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DESCRIPTION

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

43   process_file()
44               $info->process_file($source, $options);
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46       Processes one file and sets the found info fields in the $info object.
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NOTES

52       For more information about BMP see <http://msdn.microsoft.com>.
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54       Random notes:
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56         warn if height is negative and compress is not RGB or BITFILEDS (0 or 3)
57         ICO and CUR support?
58         ### v5
59         If bit depth is 0, it relies upon underlying JPG/PNG :-(
60         Extra Information
61           DWORD        bV5RedMask;
62           DWORD        bV5GreenMask;
63           DWORD        bV5BlueMask;
64           DWORD        bV5AlphaMask;
65           DWORD        bV5CSType;
66           CIEXYZTRIPLE bV5EndPoints; #3*CIEXYZ #CIEXYZ = 3*FXPT2DOT30#FXPT2DOT30 = long
67           DWORD        bV5GammaRed;
68           DWORD        bV5GammaGreen;
69           DWORD        bV5GammaBlue;
70           DWORD        bV5Intent;
71           DWORD        bV5ProfileData;
72           DWORD        bV5ProfileSize;
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DIAGNOSTICS

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

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

85       Jerrad Pierce <belg4mit@mit.edu>/<webmaster@pthbb.org>
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87       This library is free software; you can redistribute it and/or modify it
88       under the same terms as Perl itself.
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92perl v5.30.1                      2020-01-30               Image::Info::BMP(3)