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authorWilliam Joye <wjoye@cfa.harvard.edu>2019-01-08 21:02:55 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2019-01-08 21:02:55 (GMT)
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-[comment {-*- tcl -*- doctools}]
-[vset FORMATNAME ppm]
-[vset FORMATFULLNAME {Portable Pixmap format}]
-
-[include format-header.inc]
-
-This handler provides additional configuration options. See
-section [sectref {PPM OPTIONS}] for more detailed explanations.
-
-[include format-middle.inc]
-
-In addition the value for the option is treated as list and may
-contain any of the special options listed in section
-
-[sectref {PPM OPTIONS}].
-
-[list_end]
-
-[section {SUPPORTED PPM TYPES}]
-
-This handler supports the PPM (Truecolor) and PGM (Greyscale) image formats.
-There are two types of PPM/PGM files: RAW (binary) and ASCII.
-The values stored in PPM/PGM files can be unsigned 8-bit or unsigned 16-bit
-values.
-
-[example_begin]
-
- Grayscale (PGM): 8-bit and 16-bit, 1 channel per pixel.
- Truecolor (PPM): 8-bit and 16-bit, 3 channels per pixel.
-
- List of currently supported features:
-
- Type | Read | Write |
- | -file | -data | -file | -data |
- ---------------------------------------------------
- PGM 8-bit ASCII | Yes | Yes | No | No |
- PGM 8-bit BINARY | Yes | Yes | No | No |
- PGM 16-bit ASCII | Yes | Yes | No | No |
- PGM 16-bit BINARY | Yes | Yes | No | No |
- PPM 8-bit ASCII | Yes | Yes | Yes | Yes |
- PPM 8-bit BINARY | Yes | Yes | Yes | Yes |
- PPM 16-bit ASCII | Yes | Yes | No | No |
- PPM 16-bit BINARY | Yes | Yes | No | No |
-
-[example_end]
-
-[section {PPM OPTIONS}]
-
-The handler provides the following options:
-
-[list_begin definitions]
-
-[lst_item "[option -verbose] [arg bool]"]
-
-This option is supported for reading and writing.
-[nl]
-If set to [const true], additional information about the loaded/stored image
-is printed to stdout. Default is [const false].
-
-[lst_item "[option -scanorder] [arg string]"]
-
-This option is supported for reading only.
-[nl]
-Specify the scanline order of the input image.
-Possible values: [const TopDown] or [const BottomUp]. Default is [const TopDown].
-
-[lst_item "[option -gamma] [arg float]"]
-
-This option is supported for reading only.
-[nl]
-Specify a gamma correction to be applied when mapping
-16-bit input data to 8-bit image values.
-Default is [const 1.0].
-
-[lst_item "[option -min] [arg float]"]
-
-This option is supported for reading only.
-[nl]
-Specify the minimum pixel value to be used for mapping
-16-bit input data to 8-bit image values.
-Default is the minimum value found in the image data.
-
-[lst_item "[option -max] [arg float]"]
-
-This option is supported for reading only.
-[nl]
-Specify the maximum pixel value to be used for mapping
-16-bit input data to 8-bit image values.
-Default is the maximum value found in the image data.
-
-[lst_item "[option -ascii] [arg bool]"]
-
-This option is supported for writing only.
-If set to [const true], the file is written in PPM 8-bit ASCII format (P3).
-Default is [const false], i.e. write in PPM 8-bit binary format (P6).
-
-[list_end]
-
-[list_begin definitions]
-[include format-footer.inc]