| 2 |
- |
1 |
/* Copyright (C) 1999 Aladdin Enterprises. All rights reserved.
|
|
|
2 |
|
|
|
3 |
This software is provided AS-IS with no warranty, either express or
|
|
|
4 |
implied.
|
|
|
5 |
|
|
|
6 |
This software is distributed under license and may not be copied,
|
|
|
7 |
modified or distributed except as expressly authorized under the terms
|
|
|
8 |
of the license contained in the file LICENSE in this distribution.
|
|
|
9 |
|
|
|
10 |
For more information about licensing, please refer to
|
|
|
11 |
http://www.ghostscript.com/licensing/. For information on
|
|
|
12 |
commercial licensing, go to http://www.artifex.com/licensing/ or
|
|
|
13 |
contact Artifex Software, Inc., 101 Lucas Valley Road #110,
|
|
|
14 |
San Rafael, CA 94903, U.S.A., +1(415)492-9861.
|
|
|
15 |
*/
|
|
|
16 |
|
|
|
17 |
/* $Id: gdevxcmp.h,v 1.4 2002/02/21 22:24:52 giles Exp $ */
|
|
|
18 |
/* X driver color mapping structure */
|
|
|
19 |
|
|
|
20 |
#ifndef gdevxcmp_INCLUDED
|
|
|
21 |
# define gdevxcmp_INCLUDED
|
|
|
22 |
|
|
|
23 |
/*
|
|
|
24 |
* The structure defined in this file is used in only one place, in the
|
|
|
25 |
* gx_device_X structure defined in gdevx.h. We define it as a separate
|
|
|
26 |
* structure because its function is logically separate from the rest of the
|
|
|
27 |
* X driver, and because this function (color mapping / management) accounts
|
|
|
28 |
* for the single largest piece of the driver.
|
|
|
29 |
*/
|
|
|
30 |
|
|
|
31 |
/* Define pixel value to RGB mapping */
|
|
|
32 |
typedef struct x11_rgb_s {
|
|
|
33 |
gx_color_value rgb[3];
|
|
|
34 |
bool defined;
|
|
|
35 |
} x11_rgb_t;
|
|
|
36 |
|
|
|
37 |
/* Define dynamic color hash table structure */
|
|
|
38 |
typedef struct x11_color_s x11_color_t;
|
|
|
39 |
struct x11_color_s {
|
|
|
40 |
XColor color;
|
|
|
41 |
x11_color_t *next;
|
|
|
42 |
};
|
|
|
43 |
|
|
|
44 |
/*
|
|
|
45 |
* Define X color values. Fortuitously, these are the same as Ghostscript
|
|
|
46 |
* color values; in gdevxcmp.c, we are pretty sloppy about aliasing the
|
|
|
47 |
* two.
|
|
|
48 |
*/
|
|
|
49 |
typedef ushort X_color_value;
|
|
|
50 |
#define X_max_color_value 0xffff
|
|
|
51 |
|
|
|
52 |
#if HaveStdCMap /* Standard colormap stuff is only in X11R4 and later. */
|
|
|
53 |
|
|
|
54 |
/* Define the structure for values computed from a standard cmap component. */
|
|
|
55 |
typedef struct x11_cmap_values_s {
|
|
|
56 |
int cv_shift; /* 16 - log2(max_value + 1) */
|
|
|
57 |
X_color_value nearest[64]; /* [i] = i * 0xffff / max_value */
|
|
|
58 |
int pixel_shift; /* log2(mult) */
|
|
|
59 |
} x11_cmap_values_t;
|
|
|
60 |
|
|
|
61 |
#endif
|
|
|
62 |
|
|
|
63 |
typedef struct x11_cman_s {
|
|
|
64 |
|
|
|
65 |
/*
|
|
|
66 |
* num_rgb is the number of possible R/G/B values, i.e.,
|
|
|
67 |
* 1 << the bits_per_rgb of the X visual.
|
|
|
68 |
*/
|
|
|
69 |
int num_rgb;
|
|
|
70 |
|
|
|
71 |
/*
|
|
|
72 |
* color_mask is a mask that selects the high-order N bits of an
|
|
|
73 |
* X color value, where N may be the mask width for TrueColor or
|
|
|
74 |
* StaticGray and is bits_per_rgb for the other visual classes.
|
|
|
75 |
*
|
|
|
76 |
* match_mask is the mask used for comparing colors. It may have
|
|
|
77 |
* fewer bits than color_mask if the device is not using halftones.
|
|
|
78 |
*/
|
|
|
79 |
struct cmm_ {
|
|
|
80 |
X_color_value red, green, blue;
|
|
|
81 |
} color_mask, match_mask;
|
|
|
82 |
|
|
|
83 |
#if HaveStdCMap /* Standard colormap stuff is only in X11R4 and later. */
|
|
|
84 |
|
|
|
85 |
struct {
|
|
|
86 |
|
|
|
87 |
/*
|
|
|
88 |
* map is the X standard colormap for the display and screen,
|
|
|
89 |
* if one is available.
|
|
|
90 |
*/
|
|
|
91 |
XStandardColormap *map;
|
|
|
92 |
|
|
|
93 |
/*
|
|
|
94 |
* When possible, we precompute shift values and tables that replace
|
|
|
95 |
* some multiplies and divides.
|
|
|
96 |
*/
|
|
|
97 |
bool fast;
|
|
|
98 |
x11_cmap_values_t red, green, blue;
|
|
|
99 |
|
|
|
100 |
/*
|
|
|
101 |
* If free_map is true, we allocated the map ourselves (to
|
|
|
102 |
* represent a TrueColor or Static Gray visual), and must free it
|
|
|
103 |
* when closing the device.
|
|
|
104 |
*/
|
|
|
105 |
bool free_map;
|
|
|
106 |
|
|
|
107 |
} std_cmap;
|
|
|
108 |
|
|
|
109 |
#endif /* HaveStdCmap */
|
|
|
110 |
|
|
|
111 |
/*
|
|
|
112 |
* color_to_rgb is a reverse map from pixel values to RGB values. It
|
|
|
113 |
* only maps pixels values up to 255: pixel values above this must go
|
|
|
114 |
* through the standard colormap or query the server.
|
|
|
115 |
*/
|
|
|
116 |
struct cmc_ {
|
|
|
117 |
int size; /* min(1 << depth, 256) */
|
|
|
118 |
x11_rgb_t *values; /* [color_to_rgb.size] */
|
|
|
119 |
} color_to_rgb;
|
|
|
120 |
|
|
|
121 |
/*
|
|
|
122 |
* For systems with writable colormaps and no suitable standard
|
|
|
123 |
* colormap, dither_ramp is a preallocated ramp or cube used for
|
|
|
124 |
* dithering.
|
|
|
125 |
*/
|
|
|
126 |
#define CUBE_INDEX(r,g,b) (((r) * xdev->color_info.dither_colors + (g)) * \
|
|
|
127 |
xdev->color_info.dither_colors + (b))
|
|
|
128 |
x_pixel *dither_ramp; /* [color_info.dither_colors^3] if color,
|
|
|
129 |
[color_info.dither_grays] if gray */
|
|
|
130 |
|
|
|
131 |
/*
|
|
|
132 |
* For systems with writable colormaps, dynamic.colors is a chained
|
|
|
133 |
* hash table that maps RGB values (masked with color_mask) to
|
|
|
134 |
* pixel values. Entries are added dynamically.
|
|
|
135 |
*/
|
|
|
136 |
struct cmd_ {
|
|
|
137 |
int size;
|
|
|
138 |
x11_color_t **colors; /* [size] */
|
|
|
139 |
int shift; /* 16 - log2(size) */
|
|
|
140 |
int used;
|
|
|
141 |
int max_used;
|
|
|
142 |
} dynamic;
|
|
|
143 |
|
|
|
144 |
} x11_cman_t;
|
|
|
145 |
|
|
|
146 |
#endif /* gdevxcmp_INCLUDED */
|