1img-ppm(n) Img img-ppm(n)
2
6 img-ppm - Img, Portable Pixmap format (ppm)
7
9 package require Tk
10 package require img::ppm ?1.4?
12 image create photo ?name? ?options?
14
17 The package img::ppm is a sub-package of Img. It can be loaded as a
18 part of the complete Img support, via package require Img, or on its
19 own, via package require img::ppm.
20 Like all packages of Img it does not provide new commands, but extends
22 the existing Tk command image so that it supports files containing
23 raster images in the Portable Pixmap format (ppm). More specifically
24 img::ppm extends Tk's photo image type.
25 The name of the new format handler is ppm. This handler provides addi‐
27 tional configuration options. See section PPM OPTIONS for more detailed
28 explanations.
29 All of the above means that in a call like
31 image create photo ?name? ?options?
33 [1] Image data in ppm format (options -data and -file) is detected
35 automatically.
36 [2] The format name ppm is recognized by the option -format. In
38 addition the value for the option is treated as list and may
39 contain any of the special options listed in section PPM
40 OPTIONS.
41
43 This handler supports the PPM (Truecolor) and PGM (Greyscale) image
44 formats. There are two types of PPM/PGM files: RAW (binary) and ASCII.
45 The values stored in PPM/PGM files can be unsigned 8-bit or unsigned
46 16-bit values.
47 Grayscale (PGM): 8-bit and 16-bit, 1 channel per pixel.
50 Truecolor (PPM): 8-bit and 16-bit, 3 channels per pixel.
51 List of currently supported features:
53 Type | Read | Write |
55 | -file | -data | -file | -data |
56 ---------------------------------------------------
57 PGM 8-bit ASCII | Yes | Yes | No | No |
58 PGM 8-bit BINARY | Yes | Yes | No | No |
59 PGM 16-bit ASCII | Yes | Yes | No | No |
60 PGM 16-bit BINARY | Yes | Yes | No | No |
61 PPM 8-bit ASCII | Yes | Yes | Yes | Yes |
62 PPM 8-bit BINARY | Yes | Yes | Yes | Yes |
63 PPM 16-bit ASCII | Yes | Yes | No | No |
64 PPM 16-bit BINARY | Yes | Yes | No | No |
65
69 The handler provides the following options:
70 -verbose bool
72 This option is supported for reading and writing.
73 If set to true, additional information about the loaded/stored
75 image is printed to stdout. Default is false.
76 -scanorder string
78 This option is supported for reading only.
79 Specify the scanline order of the input image. Possible values:
81 TopDown or BottomUp. Default is TopDown.
82 -gamma float
84 This option is supported for reading only.
85 Specify a gamma correction to be applied when mapping 16-bit
87 input data to 8-bit image values. Default is 1.0.
88 -min float
90 This option is supported for reading only.
91 Specify the minimum pixel value to be used for mapping 16-bit
93 input data to 8-bit image values. Default is the minimum value
94 found in the image data.
95 -max float
97 This option is supported for reading only.
98 Specify the maximum pixel value to be used for mapping 16-bit
100 input data to 8-bit image values. Default is the maximum value
101 found in the image data.
102 -ascii bool
104 This option is supported for writing only. If set to true, the
105 file is written in PPM 8-bit ASCII format (P3). Default is
106 false, i.e. write in PPM 8-bit binary format (P6).
107
109 img-bmp, img-dted, img-gif, img-ico, img-intro, img-jpeg, img-pcx, img-
110 pixmap, img-png, img-ppm, img-ps, img-raw, img-sgi, img-sun, img-tga,
111 img-tiff, img-window, img-xbm, img-xpm
112
114 image handling, ppm, tk
115
117 Copyright (c) 1995-2009 Jan Nijtmans <nijtmans@users.sourceforge.net>
118img-ppm 1.4 img-ppm(n)