| slovo | definícia |
pixmap
(foldoc) | pixmap
(Contraction of "pixel map"). A 3 dimensional array of bits
corresponding to a 2 dimensional array of pixels. It is
used, for example, in the X Window System to describe a
memory region where graphics can be drawn without affecting
the screen. Typically this is used for the efficient handling
of expose events, icon images or for animation. Compare
bitmap.
[Xlib Guide].
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| | podobné slovo | definícia |
portable pixmap
(foldoc) | Portable Pixmap
PPM
(PPM) A colour image file format.
A PPM file contains the following:
a two character "magic number" - "P3",
the width in pixels,
the height in pixels,
the maximum colour component value,
HEIGHT rows of WIDTH pixels.
The rows are ordered from top to bottom with the pixels in
each row ordered from left to right. Each pixel is
represented as three values for red, green, and blue.
All parts are separated by whitespace and numbers are in
decimal ASCIII representation. A zero pixel component means
that colour is absent. Characters from a "#" to the next
end-of-line are ignored and no line should be longer than 70
characters.
Here is an example of a small pixmap in this format:
P3
# feep.ppm
4 4
15
0 0 0 0 0 0 0 0 0 15 0 15
0 0 0 0 15 7 0 0 0 0 0 0
0 0 0 0 0 0 0 15 7 0 0 0
15 0 15 0 0 0 0 0 0 0 0 0
A "RAWBITS" variant has magic number "P6", pixel values are
stored as plain binary bytes, instead of ASCII decimal and no
whitespace is allowed after a single whitespace character
after the maximum colour component value which must be less
than or equal to 255.
(1998-02-06)
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