1/*
2 *
3 * Copyright © 2000 SuSE, Inc.
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of SuSE not be used in advertising or
10 * publicity pertaining to distribution of the software without specific,
11 * written prior permission.  SuSE makes no representations about the
12 * suitability of this software for any purpose.  It is provided "as is"
13 * without express or implied warranty.
14 *
15 * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
17 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
19 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
20 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 *
22 * Author:  Keith Packard, SuSE, Inc.
23 */
24
25#ifndef _PICTURE_H_
26#define _PICTURE_H_
27
28#include "privates.h"
29
30#include <pixman.h>
31
32typedef struct _DirectFormat *DirectFormatPtr;
33typedef struct _PictFormat *PictFormatPtr;
34typedef struct _Picture *PicturePtr;
35
36/*
37 * While the protocol is generous in format support, the
38 * sample implementation allows only packed RGB and GBR
39 * representations for data to simplify software rendering,
40 */
41#define PICT_FORMAT(bpp,type,a,r,g,b)	PIXMAN_FORMAT(bpp, type, a, r, g, b)
42
43/*
44 * gray/color formats use a visual index instead of argb
45 */
46#define PICT_VISFORMAT(bpp,type,vi)	(((bpp) << 24) |  \
47					 ((type) << 16) | \
48					 ((vi)))
49
50#define PICT_FORMAT_BPP(f)	PIXMAN_FORMAT_BPP(f)
51#define PICT_FORMAT_TYPE(f)	PIXMAN_FORMAT_TYPE(f)
52#define PICT_FORMAT_A(f)	PIXMAN_FORMAT_A(f)
53#define PICT_FORMAT_R(f)	PIXMAN_FORMAT_R(f)
54#define PICT_FORMAT_G(f)	PIXMAN_FORMAT_G(f)
55#define PICT_FORMAT_B(f)	PIXMAN_FORMAT_B(f)
56#define PICT_FORMAT_RGB(f)	PIXMAN_FORMAT_RGB(f)
57#define PICT_FORMAT_VIS(f)	PIXMAN_FORMAT_VIS(f)
58
59#define PICT_TYPE_OTHER		PIXMAN_TYPE_OTHER
60#define PICT_TYPE_A		PIXMAN_TYPE_A
61#define PICT_TYPE_ARGB		PIXMAN_TYPE_ARGB
62#define PICT_TYPE_ABGR		PIXMAN_TYPE_ABGR
63#define PICT_TYPE_COLOR		PIXMAN_TYPE_COLOR
64#define PICT_TYPE_GRAY		PIXMAN_TYPE_GRAY
65#define PICT_TYPE_BGRA		PIXMAN_TYPE_BGRA
66
67#define PICT_FORMAT_COLOR(f)	PIXMAN_FORMAT_COLOR(f)
68
69/* 32bpp formats */
70typedef enum _PictFormatShort {
71    PICT_a2r10g10b10 = PIXMAN_a2r10g10b10,
72    PICT_x2r10g10b10 = PIXMAN_x2r10g10b10,
73    PICT_a2b10g10r10 = PIXMAN_a2b10g10r10,
74    PICT_x2b10g10r10 = PIXMAN_x2b10g10r10,
75
76    PICT_a8r8g8b8 = PIXMAN_a8r8g8b8,
77    PICT_x8r8g8b8 = PIXMAN_x8r8g8b8,
78    PICT_a8b8g8r8 = PIXMAN_a8b8g8r8,
79    PICT_x8b8g8r8 = PIXMAN_x8b8g8r8,
80    PICT_b8g8r8a8 = PIXMAN_b8g8r8a8,
81    PICT_b8g8r8x8 = PIXMAN_b8g8r8x8,
82
83/* 24bpp formats */
84    PICT_r8g8b8 = PIXMAN_r8g8b8,
85    PICT_b8g8r8 = PIXMAN_b8g8r8,
86
87/* 16bpp formats */
88    PICT_r5g6b5 = PIXMAN_r5g6b5,
89    PICT_b5g6r5 = PIXMAN_b5g6r5,
90
91    PICT_a1r5g5b5 = PIXMAN_a1r5g5b5,
92    PICT_x1r5g5b5 = PIXMAN_x1r5g5b5,
93    PICT_a1b5g5r5 = PIXMAN_a1b5g5r5,
94    PICT_x1b5g5r5 = PIXMAN_x1b5g5r5,
95    PICT_a4r4g4b4 = PIXMAN_a4r4g4b4,
96    PICT_x4r4g4b4 = PIXMAN_x4r4g4b4,
97    PICT_a4b4g4r4 = PIXMAN_a4b4g4r4,
98    PICT_x4b4g4r4 = PIXMAN_x4b4g4r4,
99
100/* 8bpp formats */
101    PICT_a8 = PIXMAN_a8,
102    PICT_r3g3b2 = PIXMAN_r3g3b2,
103    PICT_b2g3r3 = PIXMAN_b2g3r3,
104    PICT_a2r2g2b2 = PIXMAN_a2r2g2b2,
105    PICT_a2b2g2r2 = PIXMAN_a2b2g2r2,
106
107    PICT_c8 = PIXMAN_c8,
108    PICT_g8 = PIXMAN_g8,
109
110    PICT_x4a4 = PIXMAN_x4a4,
111
112    PICT_x4c4 = PIXMAN_x4c4,
113    PICT_x4g4 = PIXMAN_x4g4,
114
115/* 4bpp formats */
116    PICT_a4 = PIXMAN_a4,
117    PICT_r1g2b1 = PIXMAN_r1g2b1,
118    PICT_b1g2r1 = PIXMAN_b1g2r1,
119    PICT_a1r1g1b1 = PIXMAN_a1r1g1b1,
120    PICT_a1b1g1r1 = PIXMAN_a1b1g1r1,
121
122    PICT_c4 = PIXMAN_c4,
123    PICT_g4 = PIXMAN_g4,
124
125/* 1bpp formats */
126    PICT_a1 = PIXMAN_a1,
127
128    PICT_g1 = PIXMAN_g1
129} PictFormatShort;
130
131/*
132 * For dynamic indexed visuals (GrayScale and PseudoColor), these control the
133 * selection of colors allocated for drawing to Pictures.  The default
134 * policy depends on the size of the colormap:
135 *
136 * Size		Default Policy
137 * ----------------------------
138 *  < 64	PolicyMono
139 *  < 256	PolicyGray
140 *  256		PolicyColor (only on PseudoColor)
141 *
142 * The actual allocation code lives in miindex.c, and so is
143 * austensibly server dependent, but that code does:
144 *
145 * PolicyMono	    Allocate no additional colors, use black and white
146 * PolicyGray	    Allocate 13 gray levels (11 cells used)
147 * PolicyColor	    Allocate a 4x4x4 cube and 13 gray levels (71 cells used)
148 * PolicyAll	    Allocate as big a cube as possible, fill with gray (all)
149 *
150 * Here's a picture to help understand how many colors are
151 * actually allocated (this is just the gray ramp):
152 *
153 *                 gray level
154 * all   0000 1555 2aaa 4000 5555 6aaa 8000 9555 aaaa bfff d555 eaaa ffff
155 * b/w   0000                                                        ffff
156 * 4x4x4                     5555                aaaa
157 * extra      1555 2aaa 4000      6aaa 8000 9555      bfff d555 eaaa
158 *
159 * The default colormap supplies two gray levels (black/white), the
160 * 4x4x4 cube allocates another two and nine more are allocated to fill
161 * in the 13 levels.  When the 4x4x4 cube is not allocated, a total of
162 * 11 cells are allocated.
163 */
164
165#define PictureCmapPolicyInvalid    -1
166#define PictureCmapPolicyDefault    0
167#define PictureCmapPolicyMono	    1
168#define PictureCmapPolicyGray	    2
169#define PictureCmapPolicyColor	    3
170#define PictureCmapPolicyAll	    4
171
172extern int PictureCmapPolicy;
173
174extern int PictureParseCmapPolicy(const char *name);
175
176extern int RenderErrBase;
177
178/* Fixed point updates from Carl Worth, USC, Information Sciences Institute */
179
180typedef pixman_fixed_32_32_t xFixed_32_32;
181
182typedef pixman_fixed_48_16_t xFixed_48_16;
183
184#define MAX_FIXED_48_16		pixman_max_fixed_48_16
185#define MIN_FIXED_48_16		pixman_min_fixed_48_16
186
187typedef pixman_fixed_1_31_t xFixed_1_31;
188typedef pixman_fixed_1_16_t xFixed_1_16;
189typedef pixman_fixed_16_16_t xFixed_16_16;
190
191/*
192 * An unadorned "xFixed" is the same as xFixed_16_16,
193 * (since it's quite common in the code)
194 */
195typedef pixman_fixed_t xFixed;
196
197#define XFIXED_BITS	16
198
199#define xFixedToInt(f)	pixman_fixed_to_int(f)
200#define IntToxFixed(i)	pixman_int_to_fixed(i)
201#define xFixedE		pixman_fixed_e
202#define xFixed1		pixman_fixed_1
203#define xFixed1MinusE	pixman_fixed_1_minus_e
204#define xFixedFrac(f)	pixman_fixed_frac(f)
205#define xFixedFloor(f)	pixman_fixed_floor(f)
206#define xFixedCeil(f)	pixman_fixed_ceil(f)
207
208#define xFixedFraction(f)	pixman_fixed_fraction(f)
209#define xFixedMod2(f)		pixman_fixed_mod2(f)
210
211/* whether 't' is a well defined not obviously empty trapezoid */
212#define xTrapezoidValid(t)  ((t)->left.p1.y != (t)->left.p2.y && \
213			     (t)->right.p1.y != (t)->right.p2.y && \
214			     ((t)->bottom > (t)->top))
215
216/*
217 * Standard NTSC luminance conversions:
218 *
219 *  y = r * 0.299 + g * 0.587 + b * 0.114
220 *
221 * Approximate this for a bit more speed:
222 *
223 *  y = (r * 153 + g * 301 + b * 58) / 512
224 *
225 * This gives 17 bits of luminance; to get 15 bits, lop the low two
226 */
227
228#define CvtR8G8B8toY15(s)	(((((s) >> 16) & 0xff) * 153 + \
229				  (((s) >>  8) & 0xff) * 301 + \
230				  (((s)      ) & 0xff) * 58) >> 2)
231
232#endif                          /* _PICTURE_H_ */
233