50 lines
1.4 KiB
C
Executable File
50 lines
1.4 KiB
C
Executable File
/*
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* Copyright (c) 1983, by Sun Microsystems, Inc.
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*/
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#ifndef _SYS_CMS_H
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#define _SYS_CMS_H
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#pragma ident "@(#)cms.h 1.5 92/07/14 SMI" /* SunOS-4.1.2 10.4 */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* A colormapseg is a segment of a colormap that was allocated
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* to a user process. It is used to multiplex a colormap in a
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* shared resource environment, i.e., multi-windows & multi-processes.
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*
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* The cms_addr serves as a base address of a pixel. Cms_addr is added
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* with pixel values to get the true value of the colormap index.
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* The value of a colormap entry is translated to the video signal that
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* is sent to a monitor for a single pixel.
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*
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* Cms_size and cms_addr can be used by low level routines to provide some
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* protection from using a part of the colormap not allocated to the cms
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* by doing a bounds check on the pixel that is to be written.
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*
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* Cms_map is a structure that has pointers to the bytes of rgb for
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* a corresponding colormapseg. The choice of this format enables
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* fast read/write to most colormaps.
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*/
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#define CMS_NAMESIZE 20
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struct colormapseg {
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int cms_size; /* size of this segment of the map */
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int cms_addr; /* colormap addr of start of segment */
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char cms_name[CMS_NAMESIZE]; /* name segment of map (for sharing) */
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};
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struct cms_map {
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unsigned char *cm_red, *cm_green, *cm_blue;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_CMS_H */
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