1/***********************************************************
2
3Copyright 1987, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
26
27                        All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Digital not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45******************************************************************/
46/*
47 * Copyright © 1998, 2004 Keith Packard
48 * Copyright   2007 Red Hat, Inc.
49 *
50 * Permission to use, copy, modify, distribute, and sell this software and its
51 * documentation for any purpose is hereby granted without fee, provided that
52 * the above copyright notice appear in all copies and that both that
53 * copyright notice and this permission notice appear in supporting
54 * documentation, and that the name of Keith Packard not be used in
55 * advertising or publicity pertaining to distribution of the software without
56 * specific, written prior permission.  Keith Packard makes no
57 * representations about the suitability of this software for any purpose.  It
58 * is provided "as is" without express or implied warranty.
59 *
60 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
61 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
62 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
63 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
64 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
65 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
66 * PERFORMANCE OF THIS SOFTWARE.
67 */
68
69#ifndef PIXMAN_H__
70#define PIXMAN_H__
71
72#include "pixman-version.h"
73
74#ifdef  __cplusplus
75#define PIXMAN_BEGIN_DECLS extern "C" {
76#define PIXMAN_END_DECLS }
77#else
78#define PIXMAN_BEGIN_DECLS
79#define PIXMAN_END_DECLS
80#endif
81
82PIXMAN_BEGIN_DECLS
83
84/*
85 * Standard integers
86 */
87
88#if !defined (PIXMAN_DONT_DEFINE_STDINT)
89
90#if defined (_SVR4) || defined (SVR4) || defined (__OpenBSD__) || defined (_sgi) || defined (__sun) || defined (sun) || defined (__digital__) || defined (__HP_cc)
91#  include <inttypes.h>
92/* VS 2010 (_MSC_VER 1600) has stdint.h */
93#elif defined (_MSC_VER) && _MSC_VER < 1600
94typedef __int8 int8_t;
95typedef unsigned __int8 uint8_t;
96typedef __int16 int16_t;
97typedef unsigned __int16 uint16_t;
98typedef __int32 int32_t;
99typedef unsigned __int32 uint32_t;
100typedef __int64 int64_t;
101typedef unsigned __int64 uint64_t;
102#elif defined (_AIX)
103#  include <sys/inttypes.h>
104#else
105#  include <stdint.h>
106#endif
107
108#endif
109
110/*
111 * Boolean
112 */
113typedef int pixman_bool_t;
114
115/*
116 * Fixpoint numbers
117 */
118typedef int64_t			pixman_fixed_32_32_t;
119typedef pixman_fixed_32_32_t	pixman_fixed_48_16_t;
120typedef uint32_t		pixman_fixed_1_31_t;
121typedef uint32_t		pixman_fixed_1_16_t;
122typedef int32_t			pixman_fixed_16_16_t;
123typedef pixman_fixed_16_16_t	pixman_fixed_t;
124
125#define pixman_fixed_e			((pixman_fixed_t) 1)
126#define pixman_fixed_1			(pixman_int_to_fixed(1))
127#define pixman_fixed_1_minus_e		(pixman_fixed_1 - pixman_fixed_e)
128#define pixman_fixed_minus_1		(pixman_int_to_fixed(-1))
129#define pixman_fixed_to_int(f)		((int) ((f) >> 16))
130#define pixman_int_to_fixed(i)		((pixman_fixed_t) ((i) << 16))
131#define pixman_fixed_to_double(f)	(double) ((f) / (double) pixman_fixed_1)
132#define pixman_double_to_fixed(d)	((pixman_fixed_t) ((d) * 65536.0))
133#define pixman_fixed_frac(f)		((f) & pixman_fixed_1_minus_e)
134#define pixman_fixed_floor(f)		((f) & ~pixman_fixed_1_minus_e)
135#define pixman_fixed_ceil(f)		pixman_fixed_floor ((f) + pixman_fixed_1_minus_e)
136#define pixman_fixed_fraction(f)	((f) & pixman_fixed_1_minus_e)
137#define pixman_fixed_mod_2(f)		((f) & (pixman_fixed1 | pixman_fixed_1_minus_e))
138#define pixman_max_fixed_48_16		((pixman_fixed_48_16_t) 0x7fffffff)
139#define pixman_min_fixed_48_16		(-((pixman_fixed_48_16_t) 1 << 31))
140
141/*
142 * Misc structs
143 */
144typedef struct pixman_color pixman_color_t;
145typedef struct pixman_point_fixed pixman_point_fixed_t;
146typedef struct pixman_line_fixed pixman_line_fixed_t;
147typedef struct pixman_vector pixman_vector_t;
148typedef struct pixman_transform pixman_transform_t;
149
150struct pixman_color
151{
152    uint16_t	red;
153    uint16_t    green;
154    uint16_t    blue;
155    uint16_t    alpha;
156};
157
158struct pixman_point_fixed
159{
160    pixman_fixed_t	x;
161    pixman_fixed_t	y;
162};
163
164struct pixman_line_fixed
165{
166    pixman_point_fixed_t	p1, p2;
167};
168
169/*
170 * Fixed point matrices
171 */
172
173struct pixman_vector
174{
175    pixman_fixed_t	vector[3];
176};
177
178struct pixman_transform
179{
180    pixman_fixed_t	matrix[3][3];
181};
182
183/* forward declaration (sorry) */
184struct pixman_box16;
185typedef  union pixman_image		pixman_image_t;
186
187void          pixman_transform_init_identity    (struct pixman_transform       *matrix);
188pixman_bool_t pixman_transform_point_3d         (const struct pixman_transform *transform,
189						 struct pixman_vector          *vector);
190pixman_bool_t pixman_transform_point            (const struct pixman_transform *transform,
191						 struct pixman_vector          *vector);
192pixman_bool_t pixman_transform_multiply         (struct pixman_transform       *dst,
193						 const struct pixman_transform *l,
194						 const struct pixman_transform *r);
195void          pixman_transform_init_scale       (struct pixman_transform       *t,
196						 pixman_fixed_t                 sx,
197						 pixman_fixed_t                 sy);
198pixman_bool_t pixman_transform_scale            (struct pixman_transform       *forward,
199						 struct pixman_transform       *reverse,
200						 pixman_fixed_t                 sx,
201						 pixman_fixed_t                 sy);
202void          pixman_transform_init_rotate      (struct pixman_transform       *t,
203						 pixman_fixed_t                 cos,
204						 pixman_fixed_t                 sin);
205pixman_bool_t pixman_transform_rotate           (struct pixman_transform       *forward,
206						 struct pixman_transform       *reverse,
207						 pixman_fixed_t                 c,
208						 pixman_fixed_t                 s);
209void          pixman_transform_init_translate   (struct pixman_transform       *t,
210						 pixman_fixed_t                 tx,
211						 pixman_fixed_t                 ty);
212pixman_bool_t pixman_transform_translate        (struct pixman_transform       *forward,
213						 struct pixman_transform       *reverse,
214						 pixman_fixed_t                 tx,
215						 pixman_fixed_t                 ty);
216pixman_bool_t pixman_transform_bounds           (const struct pixman_transform *matrix,
217						 struct pixman_box16           *b);
218pixman_bool_t pixman_transform_invert           (struct pixman_transform       *dst,
219						 const struct pixman_transform *src);
220pixman_bool_t pixman_transform_is_identity      (const struct pixman_transform *t);
221pixman_bool_t pixman_transform_is_scale         (const struct pixman_transform *t);
222pixman_bool_t pixman_transform_is_int_translate (const struct pixman_transform *t);
223pixman_bool_t pixman_transform_is_inverse       (const struct pixman_transform *a,
224						 const struct pixman_transform *b);
225
226/*
227 * Floating point matrices
228 */
229typedef struct pixman_f_transform pixman_f_transform_t;
230typedef struct pixman_f_vector pixman_f_vector_t;
231
232struct pixman_f_vector
233{
234    double  v[3];
235};
236
237struct pixman_f_transform
238{
239    double  m[3][3];
240};
241
242pixman_bool_t pixman_transform_from_pixman_f_transform (struct pixman_transform         *t,
243							const struct pixman_f_transform *ft);
244void          pixman_f_transform_from_pixman_transform (struct pixman_f_transform       *ft,
245							const struct pixman_transform   *t);
246pixman_bool_t pixman_f_transform_invert                (struct pixman_f_transform       *dst,
247							const struct pixman_f_transform *src);
248pixman_bool_t pixman_f_transform_point                 (const struct pixman_f_transform *t,
249							struct pixman_f_vector          *v);
250void          pixman_f_transform_point_3d              (const struct pixman_f_transform *t,
251							struct pixman_f_vector          *v);
252void          pixman_f_transform_multiply              (struct pixman_f_transform       *dst,
253							const struct pixman_f_transform *l,
254							const struct pixman_f_transform *r);
255void          pixman_f_transform_init_scale            (struct pixman_f_transform       *t,
256							double                           sx,
257							double                           sy);
258pixman_bool_t pixman_f_transform_scale                 (struct pixman_f_transform       *forward,
259							struct pixman_f_transform       *reverse,
260							double                           sx,
261							double                           sy);
262void          pixman_f_transform_init_rotate           (struct pixman_f_transform       *t,
263							double                           cos,
264							double                           sin);
265pixman_bool_t pixman_f_transform_rotate                (struct pixman_f_transform       *forward,
266							struct pixman_f_transform       *reverse,
267							double                           c,
268							double                           s);
269void          pixman_f_transform_init_translate        (struct pixman_f_transform       *t,
270							double                           tx,
271							double                           ty);
272pixman_bool_t pixman_f_transform_translate             (struct pixman_f_transform       *forward,
273							struct pixman_f_transform       *reverse,
274							double                           tx,
275							double                           ty);
276pixman_bool_t pixman_f_transform_bounds                (const struct pixman_f_transform *t,
277							struct pixman_box16             *b);
278void          pixman_f_transform_init_identity         (struct pixman_f_transform       *t);
279
280typedef enum
281{
282    PIXMAN_REPEAT_NONE,
283    PIXMAN_REPEAT_NORMAL,
284    PIXMAN_REPEAT_PAD,
285    PIXMAN_REPEAT_REFLECT
286} pixman_repeat_t;
287
288typedef enum
289{
290    PIXMAN_FILTER_FAST,
291    PIXMAN_FILTER_GOOD,
292    PIXMAN_FILTER_BEST,
293    PIXMAN_FILTER_NEAREST,
294    PIXMAN_FILTER_BILINEAR,
295    PIXMAN_FILTER_CONVOLUTION,
296
297    /* The SEPARABLE_CONVOLUTION filter takes the following parameters:
298     *
299     *         width:           integer given as 16.16 fixpoint number
300     *         height:          integer given as 16.16 fixpoint number
301     *         x_phase_bits:	integer given as 16.16 fixpoint
302     *         y_phase_bits:	integer given as 16.16 fixpoint
303     *         xtables:         (1 << x_phase_bits) tables of size width
304     *         ytables:         (1 << y_phase_bits) tables of size height
305     *
306     * When sampling at (x, y), the location is first rounded to one of
307     * n_x_phases * n_y_phases subpixel positions. These subpixel positions
308     * determine an xtable and a ytable to use.
309     *
310     * Conceptually a width x height matrix is then formed in which each entry
311     * is the product of the corresponding entries in the x and y tables.
312     * This matrix is then aligned with the image pixels such that its center
313     * is as close as possible to the subpixel location chosen earlier. Then
314     * the image is convolved with the matrix and the resulting pixel returned.
315     */
316    PIXMAN_FILTER_SEPARABLE_CONVOLUTION
317} pixman_filter_t;
318
319typedef enum
320{
321    PIXMAN_OP_CLEAR			= 0x00,
322    PIXMAN_OP_SRC			= 0x01,
323    PIXMAN_OP_DST			= 0x02,
324    PIXMAN_OP_OVER			= 0x03,
325    PIXMAN_OP_OVER_REVERSE		= 0x04,
326    PIXMAN_OP_IN			= 0x05,
327    PIXMAN_OP_IN_REVERSE		= 0x06,
328    PIXMAN_OP_OUT			= 0x07,
329    PIXMAN_OP_OUT_REVERSE		= 0x08,
330    PIXMAN_OP_ATOP			= 0x09,
331    PIXMAN_OP_ATOP_REVERSE		= 0x0a,
332    PIXMAN_OP_XOR			= 0x0b,
333    PIXMAN_OP_ADD			= 0x0c,
334    PIXMAN_OP_SATURATE			= 0x0d,
335
336    PIXMAN_OP_DISJOINT_CLEAR		= 0x10,
337    PIXMAN_OP_DISJOINT_SRC		= 0x11,
338    PIXMAN_OP_DISJOINT_DST		= 0x12,
339    PIXMAN_OP_DISJOINT_OVER		= 0x13,
340    PIXMAN_OP_DISJOINT_OVER_REVERSE	= 0x14,
341    PIXMAN_OP_DISJOINT_IN		= 0x15,
342    PIXMAN_OP_DISJOINT_IN_REVERSE	= 0x16,
343    PIXMAN_OP_DISJOINT_OUT		= 0x17,
344    PIXMAN_OP_DISJOINT_OUT_REVERSE	= 0x18,
345    PIXMAN_OP_DISJOINT_ATOP		= 0x19,
346    PIXMAN_OP_DISJOINT_ATOP_REVERSE	= 0x1a,
347    PIXMAN_OP_DISJOINT_XOR		= 0x1b,
348
349    PIXMAN_OP_CONJOINT_CLEAR		= 0x20,
350    PIXMAN_OP_CONJOINT_SRC		= 0x21,
351    PIXMAN_OP_CONJOINT_DST		= 0x22,
352    PIXMAN_OP_CONJOINT_OVER		= 0x23,
353    PIXMAN_OP_CONJOINT_OVER_REVERSE	= 0x24,
354    PIXMAN_OP_CONJOINT_IN		= 0x25,
355    PIXMAN_OP_CONJOINT_IN_REVERSE	= 0x26,
356    PIXMAN_OP_CONJOINT_OUT		= 0x27,
357    PIXMAN_OP_CONJOINT_OUT_REVERSE	= 0x28,
358    PIXMAN_OP_CONJOINT_ATOP		= 0x29,
359    PIXMAN_OP_CONJOINT_ATOP_REVERSE	= 0x2a,
360    PIXMAN_OP_CONJOINT_XOR		= 0x2b,
361
362    PIXMAN_OP_MULTIPLY                  = 0x30,
363    PIXMAN_OP_SCREEN                    = 0x31,
364    PIXMAN_OP_OVERLAY                   = 0x32,
365    PIXMAN_OP_DARKEN                    = 0x33,
366    PIXMAN_OP_LIGHTEN                   = 0x34,
367    PIXMAN_OP_COLOR_DODGE               = 0x35,
368    PIXMAN_OP_COLOR_BURN                = 0x36,
369    PIXMAN_OP_HARD_LIGHT                = 0x37,
370    PIXMAN_OP_SOFT_LIGHT                = 0x38,
371    PIXMAN_OP_DIFFERENCE                = 0x39,
372    PIXMAN_OP_EXCLUSION                 = 0x3a,
373    PIXMAN_OP_HSL_HUE			= 0x3b,
374    PIXMAN_OP_HSL_SATURATION		= 0x3c,
375    PIXMAN_OP_HSL_COLOR			= 0x3d,
376    PIXMAN_OP_HSL_LUMINOSITY		= 0x3e
377
378#ifdef PIXMAN_USE_INTERNAL_API
379    ,
380    PIXMAN_N_OPERATORS,
381    PIXMAN_OP_NONE = PIXMAN_N_OPERATORS
382#endif
383} pixman_op_t;
384
385/*
386 * Regions
387 */
388typedef struct pixman_region16_data	pixman_region16_data_t;
389typedef struct pixman_box16		pixman_box16_t;
390typedef struct pixman_rectangle16	pixman_rectangle16_t;
391typedef struct pixman_region16		pixman_region16_t;
392
393struct pixman_region16_data {
394    long		size;
395    long		numRects;
396/*  pixman_box16_t	rects[size];   in memory but not explicitly declared */
397};
398
399struct pixman_rectangle16
400{
401    int16_t	x, y;
402    uint16_t	width, height;
403};
404
405struct pixman_box16
406{
407    int16_t x1, y1, x2, y2;
408};
409
410struct pixman_region16
411{
412    pixman_box16_t          extents;
413    pixman_region16_data_t *data;
414};
415
416typedef enum
417{
418    PIXMAN_REGION_OUT,
419    PIXMAN_REGION_IN,
420    PIXMAN_REGION_PART
421} pixman_region_overlap_t;
422
423/* This function exists only to make it possible to preserve
424 * the X ABI - it should go away at first opportunity.
425 */
426void pixman_region_set_static_pointers (pixman_box16_t         *empty_box,
427					pixman_region16_data_t *empty_data,
428					pixman_region16_data_t *broken_data);
429
430/* creation/destruction */
431void                    pixman_region_init               (pixman_region16_t *region);
432void                    pixman_region_init_rect          (pixman_region16_t *region,
433							  int                x,
434							  int                y,
435							  unsigned int       width,
436							  unsigned int       height);
437pixman_bool_t           pixman_region_init_rects         (pixman_region16_t *region,
438							  const pixman_box16_t *boxes,
439							  int                count);
440void                    pixman_region_init_with_extents  (pixman_region16_t *region,
441							  pixman_box16_t    *extents);
442void                    pixman_region_init_from_image    (pixman_region16_t *region,
443							  pixman_image_t    *image);
444void                    pixman_region_fini               (pixman_region16_t *region);
445
446
447/* manipulation */
448void                    pixman_region_translate          (pixman_region16_t *region,
449							  int                x,
450							  int                y);
451pixman_bool_t           pixman_region_copy               (pixman_region16_t *dest,
452							  pixman_region16_t *source);
453pixman_bool_t           pixman_region_intersect          (pixman_region16_t *new_reg,
454							  pixman_region16_t *reg1,
455							  pixman_region16_t *reg2);
456pixman_bool_t           pixman_region_union              (pixman_region16_t *new_reg,
457							  pixman_region16_t *reg1,
458							  pixman_region16_t *reg2);
459pixman_bool_t           pixman_region_union_rect         (pixman_region16_t *dest,
460							  pixman_region16_t *source,
461							  int                x,
462							  int                y,
463							  unsigned int       width,
464							  unsigned int       height);
465pixman_bool_t		pixman_region_intersect_rect     (pixman_region16_t *dest,
466							  pixman_region16_t *source,
467							  int                x,
468							  int                y,
469							  unsigned int       width,
470							  unsigned int       height);
471pixman_bool_t           pixman_region_subtract           (pixman_region16_t *reg_d,
472							  pixman_region16_t *reg_m,
473							  pixman_region16_t *reg_s);
474pixman_bool_t           pixman_region_inverse            (pixman_region16_t *new_reg,
475							  pixman_region16_t *reg1,
476							  pixman_box16_t    *inv_rect);
477pixman_bool_t           pixman_region_contains_point     (pixman_region16_t *region,
478							  int                x,
479							  int                y,
480							  pixman_box16_t    *box);
481pixman_region_overlap_t pixman_region_contains_rectangle (pixman_region16_t *region,
482							  pixman_box16_t    *prect);
483pixman_bool_t           pixman_region_not_empty          (pixman_region16_t *region);
484pixman_box16_t *        pixman_region_extents            (pixman_region16_t *region);
485int                     pixman_region_n_rects            (pixman_region16_t *region);
486pixman_box16_t *        pixman_region_rectangles         (pixman_region16_t *region,
487							  int               *n_rects);
488pixman_bool_t           pixman_region_equal              (pixman_region16_t *region1,
489							  pixman_region16_t *region2);
490pixman_bool_t           pixman_region_selfcheck          (pixman_region16_t *region);
491void                    pixman_region_reset              (pixman_region16_t *region,
492							  pixman_box16_t    *box);
493void			pixman_region_clear		 (pixman_region16_t *region);
494/*
495 * 32 bit regions
496 */
497typedef struct pixman_region32_data	pixman_region32_data_t;
498typedef struct pixman_box32		pixman_box32_t;
499typedef struct pixman_rectangle32	pixman_rectangle32_t;
500typedef struct pixman_region32		pixman_region32_t;
501
502struct pixman_region32_data {
503    long		size;
504    long		numRects;
505/*  pixman_box32_t	rects[size];   in memory but not explicitly declared */
506};
507
508struct pixman_rectangle32
509{
510    int32_t x, y;
511    uint32_t width, height;
512};
513
514struct pixman_box32
515{
516    int32_t x1, y1, x2, y2;
517};
518
519struct pixman_region32
520{
521    pixman_box32_t          extents;
522    pixman_region32_data_t  *data;
523};
524
525/* creation/destruction */
526void                    pixman_region32_init               (pixman_region32_t *region);
527void                    pixman_region32_init_rect          (pixman_region32_t *region,
528							    int                x,
529							    int                y,
530							    unsigned int       width,
531							    unsigned int       height);
532pixman_bool_t           pixman_region32_init_rects         (pixman_region32_t *region,
533							    const pixman_box32_t *boxes,
534							    int                count);
535void                    pixman_region32_init_with_extents  (pixman_region32_t *region,
536							    pixman_box32_t    *extents);
537void                    pixman_region32_init_from_image    (pixman_region32_t *region,
538							    pixman_image_t    *image);
539void                    pixman_region32_fini               (pixman_region32_t *region);
540
541
542/* manipulation */
543void                    pixman_region32_translate          (pixman_region32_t *region,
544							    int                x,
545							    int                y);
546pixman_bool_t           pixman_region32_copy               (pixman_region32_t *dest,
547							    pixman_region32_t *source);
548pixman_bool_t           pixman_region32_intersect          (pixman_region32_t *new_reg,
549							    pixman_region32_t *reg1,
550							    pixman_region32_t *reg2);
551pixman_bool_t           pixman_region32_union              (pixman_region32_t *new_reg,
552							    pixman_region32_t *reg1,
553							    pixman_region32_t *reg2);
554pixman_bool_t		pixman_region32_intersect_rect     (pixman_region32_t *dest,
555							    pixman_region32_t *source,
556							    int                x,
557							    int                y,
558							    unsigned int       width,
559							    unsigned int       height);
560pixman_bool_t           pixman_region32_union_rect         (pixman_region32_t *dest,
561							    pixman_region32_t *source,
562							    int                x,
563							    int                y,
564							    unsigned int       width,
565							    unsigned int       height);
566pixman_bool_t           pixman_region32_subtract           (pixman_region32_t *reg_d,
567							    pixman_region32_t *reg_m,
568							    pixman_region32_t *reg_s);
569pixman_bool_t           pixman_region32_inverse            (pixman_region32_t *new_reg,
570							    pixman_region32_t *reg1,
571							    pixman_box32_t    *inv_rect);
572pixman_bool_t           pixman_region32_contains_point     (pixman_region32_t *region,
573							    int                x,
574							    int                y,
575							    pixman_box32_t    *box);
576pixman_region_overlap_t pixman_region32_contains_rectangle (pixman_region32_t *region,
577							    pixman_box32_t    *prect);
578pixman_bool_t           pixman_region32_not_empty          (pixman_region32_t *region);
579pixman_box32_t *        pixman_region32_extents            (pixman_region32_t *region);
580int                     pixman_region32_n_rects            (pixman_region32_t *region);
581pixman_box32_t *        pixman_region32_rectangles         (pixman_region32_t *region,
582							    int               *n_rects);
583pixman_bool_t           pixman_region32_equal              (pixman_region32_t *region1,
584							    pixman_region32_t *region2);
585pixman_bool_t           pixman_region32_selfcheck          (pixman_region32_t *region);
586void                    pixman_region32_reset              (pixman_region32_t *region,
587							    pixman_box32_t    *box);
588void			pixman_region32_clear		   (pixman_region32_t *region);
589
590
591/* Copy / Fill / Misc */
592pixman_bool_t pixman_blt                (uint32_t           *src_bits,
593					 uint32_t           *dst_bits,
594					 int                 src_stride,
595					 int                 dst_stride,
596					 int                 src_bpp,
597					 int                 dst_bpp,
598					 int                 src_x,
599					 int                 src_y,
600					 int                 dest_x,
601					 int                 dest_y,
602					 int                 width,
603					 int                 height);
604pixman_bool_t pixman_fill               (uint32_t           *bits,
605					 int                 stride,
606					 int                 bpp,
607					 int                 x,
608					 int                 y,
609					 int                 width,
610					 int                 height,
611					 uint32_t            _xor);
612
613int           pixman_version            (void);
614const char*   pixman_version_string     (void);
615
616/*
617 * Images
618 */
619typedef struct pixman_indexed		pixman_indexed_t;
620typedef struct pixman_gradient_stop	pixman_gradient_stop_t;
621
622typedef uint32_t (* pixman_read_memory_func_t) (const void *src, int size);
623typedef void     (* pixman_write_memory_func_t) (void *dst, uint32_t value, int size);
624
625typedef void     (* pixman_image_destroy_func_t) (pixman_image_t *image, void *data);
626
627struct pixman_gradient_stop {
628    pixman_fixed_t x;
629    pixman_color_t color;
630};
631
632#define PIXMAN_MAX_INDEXED  256 /* XXX depth must be <= 8 */
633
634#if PIXMAN_MAX_INDEXED <= 256
635typedef uint8_t pixman_index_type;
636#endif
637
638struct pixman_indexed
639{
640    pixman_bool_t       color;
641    uint32_t		rgba[PIXMAN_MAX_INDEXED];
642    pixman_index_type	ent[32768];
643};
644
645/*
646 * While the protocol is generous in format support, the
647 * sample implementation allows only packed RGB and GBR
648 * representations for data to simplify software rendering,
649 */
650#define PIXMAN_FORMAT(bpp,type,a,r,g,b)	(((bpp) << 24) |  \
651					 ((type) << 16) | \
652					 ((a) << 12) |	  \
653					 ((r) << 8) |	  \
654					 ((g) << 4) |	  \
655					 ((b)))
656
657#define PIXMAN_FORMAT_BPP(f)	(((f) >> 24)       )
658#define PIXMAN_FORMAT_TYPE(f)	(((f) >> 16) & 0xff)
659#define PIXMAN_FORMAT_A(f)	(((f) >> 12) & 0x0f)
660#define PIXMAN_FORMAT_R(f)	(((f) >>  8) & 0x0f)
661#define PIXMAN_FORMAT_G(f)	(((f) >>  4) & 0x0f)
662#define PIXMAN_FORMAT_B(f)	(((f)      ) & 0x0f)
663#define PIXMAN_FORMAT_RGB(f)	(((f)      ) & 0xfff)
664#define PIXMAN_FORMAT_VIS(f)	(((f)      ) & 0xffff)
665#define PIXMAN_FORMAT_DEPTH(f)	(PIXMAN_FORMAT_A(f) +	\
666				 PIXMAN_FORMAT_R(f) +	\
667				 PIXMAN_FORMAT_G(f) +	\
668				 PIXMAN_FORMAT_B(f))
669
670#define PIXMAN_TYPE_OTHER	0
671#define PIXMAN_TYPE_A		1
672#define PIXMAN_TYPE_ARGB	2
673#define PIXMAN_TYPE_ABGR	3
674#define PIXMAN_TYPE_COLOR	4
675#define PIXMAN_TYPE_GRAY	5
676#define PIXMAN_TYPE_YUY2	6
677#define PIXMAN_TYPE_YV12	7
678#define PIXMAN_TYPE_BGRA	8
679#define PIXMAN_TYPE_RGBA	9
680#define PIXMAN_TYPE_ARGB_SRGB	10
681
682#define PIXMAN_FORMAT_COLOR(f)				\
683	(PIXMAN_FORMAT_TYPE(f) == PIXMAN_TYPE_ARGB ||	\
684	 PIXMAN_FORMAT_TYPE(f) == PIXMAN_TYPE_ABGR ||	\
685	 PIXMAN_FORMAT_TYPE(f) == PIXMAN_TYPE_BGRA ||	\
686	 PIXMAN_FORMAT_TYPE(f) == PIXMAN_TYPE_RGBA)
687
688/* 32bpp formats */
689typedef enum {
690    PIXMAN_a8r8g8b8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB,8,8,8,8),
691    PIXMAN_x8r8g8b8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB,0,8,8,8),
692    PIXMAN_a8b8g8r8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_ABGR,8,8,8,8),
693    PIXMAN_x8b8g8r8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_ABGR,0,8,8,8),
694    PIXMAN_b8g8r8a8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_BGRA,8,8,8,8),
695    PIXMAN_b8g8r8x8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_BGRA,0,8,8,8),
696    PIXMAN_r8g8b8a8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_RGBA,8,8,8,8),
697    PIXMAN_r8g8b8x8 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_RGBA,0,8,8,8),
698    PIXMAN_x14r6g6b6 =	 PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB,0,6,6,6),
699    PIXMAN_x2r10g10b10 = PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB,0,10,10,10),
700    PIXMAN_a2r10g10b10 = PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB,2,10,10,10),
701    PIXMAN_x2b10g10r10 = PIXMAN_FORMAT(32,PIXMAN_TYPE_ABGR,0,10,10,10),
702    PIXMAN_a2b10g10r10 = PIXMAN_FORMAT(32,PIXMAN_TYPE_ABGR,2,10,10,10),
703
704/* sRGB formats */
705    PIXMAN_a8r8g8b8_sRGB = PIXMAN_FORMAT(32,PIXMAN_TYPE_ARGB_SRGB,8,8,8,8),
706
707/* 24bpp formats */
708    PIXMAN_r8g8b8 =	 PIXMAN_FORMAT(24,PIXMAN_TYPE_ARGB,0,8,8,8),
709    PIXMAN_b8g8r8 =	 PIXMAN_FORMAT(24,PIXMAN_TYPE_ABGR,0,8,8,8),
710
711/* 16bpp formats */
712    PIXMAN_r5g6b5 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,0,5,6,5),
713    PIXMAN_b5g6r5 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,0,5,6,5),
714
715    PIXMAN_a1r5g5b5 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,1,5,5,5),
716    PIXMAN_x1r5g5b5 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,0,5,5,5),
717    PIXMAN_a1b5g5r5 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,1,5,5,5),
718    PIXMAN_x1b5g5r5 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,0,5,5,5),
719    PIXMAN_a4r4g4b4 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,4,4,4,4),
720    PIXMAN_x4r4g4b4 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ARGB,0,4,4,4),
721    PIXMAN_a4b4g4r4 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,4,4,4,4),
722    PIXMAN_x4b4g4r4 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_ABGR,0,4,4,4),
723
724/* 8bpp formats */
725    PIXMAN_a8 =		 PIXMAN_FORMAT(8,PIXMAN_TYPE_A,8,0,0,0),
726    PIXMAN_r3g3b2 =	 PIXMAN_FORMAT(8,PIXMAN_TYPE_ARGB,0,3,3,2),
727    PIXMAN_b2g3r3 =	 PIXMAN_FORMAT(8,PIXMAN_TYPE_ABGR,0,3,3,2),
728    PIXMAN_a2r2g2b2 =	 PIXMAN_FORMAT(8,PIXMAN_TYPE_ARGB,2,2,2,2),
729    PIXMAN_a2b2g2r2 =	 PIXMAN_FORMAT(8,PIXMAN_TYPE_ABGR,2,2,2,2),
730
731    PIXMAN_c8 =		 PIXMAN_FORMAT(8,PIXMAN_TYPE_COLOR,0,0,0,0),
732    PIXMAN_g8 =		 PIXMAN_FORMAT(8,PIXMAN_TYPE_GRAY,0,0,0,0),
733
734    PIXMAN_x4a4 =	 PIXMAN_FORMAT(8,PIXMAN_TYPE_A,4,0,0,0),
735
736    PIXMAN_x4c4 =	 PIXMAN_FORMAT(8,PIXMAN_TYPE_COLOR,0,0,0,0),
737    PIXMAN_x4g4 =	 PIXMAN_FORMAT(8,PIXMAN_TYPE_GRAY,0,0,0,0),
738
739/* 4bpp formats */
740    PIXMAN_a4 =		 PIXMAN_FORMAT(4,PIXMAN_TYPE_A,4,0,0,0),
741    PIXMAN_r1g2b1 =	 PIXMAN_FORMAT(4,PIXMAN_TYPE_ARGB,0,1,2,1),
742    PIXMAN_b1g2r1 =	 PIXMAN_FORMAT(4,PIXMAN_TYPE_ABGR,0,1,2,1),
743    PIXMAN_a1r1g1b1 =	 PIXMAN_FORMAT(4,PIXMAN_TYPE_ARGB,1,1,1,1),
744    PIXMAN_a1b1g1r1 =	 PIXMAN_FORMAT(4,PIXMAN_TYPE_ABGR,1,1,1,1),
745
746    PIXMAN_c4 =		 PIXMAN_FORMAT(4,PIXMAN_TYPE_COLOR,0,0,0,0),
747    PIXMAN_g4 =		 PIXMAN_FORMAT(4,PIXMAN_TYPE_GRAY,0,0,0,0),
748
749/* 1bpp formats */
750    PIXMAN_a1 =		 PIXMAN_FORMAT(1,PIXMAN_TYPE_A,1,0,0,0),
751
752    PIXMAN_g1 =		 PIXMAN_FORMAT(1,PIXMAN_TYPE_GRAY,0,0,0,0),
753
754/* YUV formats */
755    PIXMAN_yuy2 =	 PIXMAN_FORMAT(16,PIXMAN_TYPE_YUY2,0,0,0,0),
756    PIXMAN_yv12 =	 PIXMAN_FORMAT(12,PIXMAN_TYPE_YV12,0,0,0,0)
757} pixman_format_code_t;
758
759/* Querying supported format values. */
760pixman_bool_t pixman_format_supported_destination (pixman_format_code_t format);
761pixman_bool_t pixman_format_supported_source      (pixman_format_code_t format);
762
763/* Constructors */
764pixman_image_t *pixman_image_create_solid_fill       (const pixman_color_t         *color);
765pixman_image_t *pixman_image_create_linear_gradient  (const pixman_point_fixed_t   *p1,
766						      const pixman_point_fixed_t   *p2,
767						      const pixman_gradient_stop_t *stops,
768						      int                           n_stops);
769pixman_image_t *pixman_image_create_radial_gradient  (const pixman_point_fixed_t   *inner,
770						      const pixman_point_fixed_t   *outer,
771						      pixman_fixed_t                inner_radius,
772						      pixman_fixed_t                outer_radius,
773						      const pixman_gradient_stop_t *stops,
774						      int                           n_stops);
775pixman_image_t *pixman_image_create_conical_gradient (const pixman_point_fixed_t   *center,
776						      pixman_fixed_t                angle,
777						      const pixman_gradient_stop_t *stops,
778						      int                           n_stops);
779pixman_image_t *pixman_image_create_bits             (pixman_format_code_t          format,
780						      int                           width,
781						      int                           height,
782						      uint32_t                     *bits,
783						      int                           rowstride_bytes);
784pixman_image_t *pixman_image_create_bits_no_clear    (pixman_format_code_t format,
785						      int                  width,
786						      int                  height,
787						      uint32_t *           bits,
788						      int                  rowstride_bytes);
789
790/* Destructor */
791pixman_image_t *pixman_image_ref                     (pixman_image_t               *image);
792pixman_bool_t   pixman_image_unref                   (pixman_image_t               *image);
793
794void		pixman_image_set_destroy_function    (pixman_image_t		   *image,
795						      pixman_image_destroy_func_t   function,
796						      void			   *data);
797void *		pixman_image_get_destroy_data        (pixman_image_t		   *image);
798
799/* Set properties */
800pixman_bool_t   pixman_image_set_clip_region         (pixman_image_t               *image,
801						      pixman_region16_t            *region);
802pixman_bool_t   pixman_image_set_clip_region32       (pixman_image_t               *image,
803						      pixman_region32_t            *region);
804void		pixman_image_set_has_client_clip     (pixman_image_t               *image,
805						      pixman_bool_t		    clien_clip);
806pixman_bool_t   pixman_image_set_transform           (pixman_image_t               *image,
807						      const pixman_transform_t     *transform);
808void            pixman_image_set_repeat              (pixman_image_t               *image,
809						      pixman_repeat_t               repeat);
810pixman_bool_t   pixman_image_set_filter              (pixman_image_t               *image,
811						      pixman_filter_t               filter,
812						      const pixman_fixed_t         *filter_params,
813						      int                           n_filter_params);
814void		pixman_image_set_source_clipping     (pixman_image_t		   *image,
815						      pixman_bool_t                 source_clipping);
816void            pixman_image_set_alpha_map           (pixman_image_t               *image,
817						      pixman_image_t               *alpha_map,
818						      int16_t                       x,
819						      int16_t                       y);
820void            pixman_image_set_component_alpha     (pixman_image_t               *image,
821						      pixman_bool_t                 component_alpha);
822pixman_bool_t   pixman_image_get_component_alpha     (pixman_image_t               *image);
823void		pixman_image_set_accessors	     (pixman_image_t		   *image,
824						      pixman_read_memory_func_t	    read_func,
825						      pixman_write_memory_func_t    write_func);
826void		pixman_image_set_indexed	     (pixman_image_t		   *image,
827						      const pixman_indexed_t	   *indexed);
828uint32_t       *pixman_image_get_data                (pixman_image_t               *image);
829int		pixman_image_get_width               (pixman_image_t               *image);
830int             pixman_image_get_height              (pixman_image_t               *image);
831int		pixman_image_get_stride              (pixman_image_t               *image); /* in bytes */
832int		pixman_image_get_depth               (pixman_image_t		   *image);
833pixman_format_code_t pixman_image_get_format	     (pixman_image_t		   *image);
834
835typedef enum
836{
837    PIXMAN_KERNEL_IMPULSE,
838    PIXMAN_KERNEL_BOX,
839    PIXMAN_KERNEL_LINEAR,
840    PIXMAN_KERNEL_CUBIC,
841    PIXMAN_KERNEL_GAUSSIAN,
842    PIXMAN_KERNEL_LANCZOS2,
843    PIXMAN_KERNEL_LANCZOS3,
844    PIXMAN_KERNEL_LANCZOS3_STRETCHED       /* Jim Blinn's 'nice' filter */
845} pixman_kernel_t;
846
847/* Create the parameter list for a SEPARABLE_CONVOLUTION filter
848 * with the given kernels and scale parameters.
849 */
850pixman_fixed_t *
851pixman_filter_create_separable_convolution (int             *n_values,
852					    pixman_fixed_t   scale_x,
853					    pixman_fixed_t   scale_y,
854					    pixman_kernel_t  reconstruct_x,
855					    pixman_kernel_t  reconstruct_y,
856					    pixman_kernel_t  sample_x,
857					    pixman_kernel_t  sample_y,
858					    int              subsample_bits_x,
859					    int              subsample_bits_y);
860
861pixman_bool_t	pixman_image_fill_rectangles	     (pixman_op_t		    op,
862						      pixman_image_t		   *image,
863						      const pixman_color_t	   *color,
864						      int			    n_rects,
865						      const pixman_rectangle16_t   *rects);
866pixman_bool_t   pixman_image_fill_boxes              (pixman_op_t                   op,
867                                                      pixman_image_t               *dest,
868                                                      const pixman_color_t         *color,
869                                                      int                           n_boxes,
870                                                      const pixman_box32_t         *boxes);
871
872/* Composite */
873pixman_bool_t pixman_compute_composite_region (pixman_region16_t *region,
874					       pixman_image_t    *src_image,
875					       pixman_image_t    *mask_image,
876					       pixman_image_t    *dest_image,
877					       int16_t            src_x,
878					       int16_t            src_y,
879					       int16_t            mask_x,
880					       int16_t            mask_y,
881					       int16_t            dest_x,
882					       int16_t            dest_y,
883					       uint16_t           width,
884					       uint16_t           height);
885void          pixman_image_composite          (pixman_op_t        op,
886					       pixman_image_t    *src,
887					       pixman_image_t    *mask,
888					       pixman_image_t    *dest,
889					       int16_t            src_x,
890					       int16_t            src_y,
891					       int16_t            mask_x,
892					       int16_t            mask_y,
893					       int16_t            dest_x,
894					       int16_t            dest_y,
895					       uint16_t           width,
896					       uint16_t           height);
897void          pixman_image_composite32        (pixman_op_t        op,
898					       pixman_image_t    *src,
899					       pixman_image_t    *mask,
900					       pixman_image_t    *dest,
901					       int32_t            src_x,
902					       int32_t            src_y,
903					       int32_t            mask_x,
904					       int32_t            mask_y,
905					       int32_t            dest_x,
906					       int32_t            dest_y,
907					       int32_t            width,
908					       int32_t            height);
909
910/* Executive Summary: This function is a no-op that only exists
911 * for historical reasons.
912 *
913 * There used to be a bug in the X server where it would rely on
914 * out-of-bounds accesses when it was asked to composite with a
915 * window as the source. It would create a pixman image pointing
916 * to some bogus position in memory, but then set a clip region
917 * to the position where the actual bits were.
918 *
919 * Due to a bug in old versions of pixman, where it would not clip
920 * against the image bounds when a clip region was set, this would
921 * actually work. So when the pixman bug was fixed, a workaround was
922 * added to allow certain out-of-bound accesses. This function disabled
923 * those workarounds.
924 *
925 * Since 0.21.2, pixman doesn't do these workarounds anymore, so now this
926 * function is a no-op.
927 */
928void pixman_disable_out_of_bounds_workaround (void);
929
930/*
931 * Glyphs
932 */
933typedef struct pixman_glyph_cache_t pixman_glyph_cache_t;
934typedef struct
935{
936    int		x, y;
937    const void *glyph;
938} pixman_glyph_t;
939
940pixman_glyph_cache_t *pixman_glyph_cache_create       (void);
941void                  pixman_glyph_cache_destroy      (pixman_glyph_cache_t *cache);
942void                  pixman_glyph_cache_freeze       (pixman_glyph_cache_t *cache);
943void                  pixman_glyph_cache_thaw         (pixman_glyph_cache_t *cache);
944const void *          pixman_glyph_cache_lookup       (pixman_glyph_cache_t *cache,
945						       void                 *font_key,
946						       void                 *glyph_key);
947const void *          pixman_glyph_cache_insert       (pixman_glyph_cache_t *cache,
948						       void                 *font_key,
949						       void                 *glyph_key,
950						       int		     origin_x,
951						       int                   origin_y,
952						       pixman_image_t       *glyph_image);
953void                  pixman_glyph_cache_remove       (pixman_glyph_cache_t *cache,
954						       void                 *font_key,
955						       void                 *glyph_key);
956void                  pixman_glyph_get_extents        (pixman_glyph_cache_t *cache,
957						       int                   n_glyphs,
958						       pixman_glyph_t       *glyphs,
959						       pixman_box32_t       *extents);
960pixman_format_code_t  pixman_glyph_get_mask_format    (pixman_glyph_cache_t *cache,
961						       int		     n_glyphs,
962						       const pixman_glyph_t *glyphs);
963void                  pixman_composite_glyphs         (pixman_op_t           op,
964						       pixman_image_t       *src,
965						       pixman_image_t       *dest,
966						       pixman_format_code_t  mask_format,
967						       int32_t               src_x,
968						       int32_t               src_y,
969						       int32_t		     mask_x,
970						       int32_t		     mask_y,
971						       int32_t               dest_x,
972						       int32_t               dest_y,
973						       int32_t		     width,
974						       int32_t		     height,
975						       pixman_glyph_cache_t *cache,
976						       int		     n_glyphs,
977						       const pixman_glyph_t *glyphs);
978void                  pixman_composite_glyphs_no_mask (pixman_op_t           op,
979						       pixman_image_t       *src,
980						       pixman_image_t       *dest,
981						       int32_t               src_x,
982						       int32_t               src_y,
983						       int32_t               dest_x,
984						       int32_t               dest_y,
985						       pixman_glyph_cache_t *cache,
986						       int		     n_glyphs,
987						       const pixman_glyph_t *glyphs);
988
989/*
990 * Trapezoids
991 */
992typedef struct pixman_edge pixman_edge_t;
993typedef struct pixman_trapezoid pixman_trapezoid_t;
994typedef struct pixman_trap pixman_trap_t;
995typedef struct pixman_span_fix pixman_span_fix_t;
996typedef struct pixman_triangle pixman_triangle_t;
997
998/*
999 * An edge structure.  This represents a single polygon edge
1000 * and can be quickly stepped across small or large gaps in the
1001 * sample grid
1002 */
1003struct pixman_edge
1004{
1005    pixman_fixed_t	x;
1006    pixman_fixed_t	e;
1007    pixman_fixed_t	stepx;
1008    pixman_fixed_t	signdx;
1009    pixman_fixed_t	dy;
1010    pixman_fixed_t	dx;
1011
1012    pixman_fixed_t	stepx_small;
1013    pixman_fixed_t	stepx_big;
1014    pixman_fixed_t	dx_small;
1015    pixman_fixed_t	dx_big;
1016};
1017
1018struct pixman_trapezoid
1019{
1020    pixman_fixed_t	top, bottom;
1021    pixman_line_fixed_t	left, right;
1022};
1023
1024struct pixman_triangle
1025{
1026    pixman_point_fixed_t p1, p2, p3;
1027};
1028
1029/* whether 't' is a well defined not obviously empty trapezoid */
1030#define pixman_trapezoid_valid(t)				   \
1031    ((t)->left.p1.y != (t)->left.p2.y &&			   \
1032     (t)->right.p1.y != (t)->right.p2.y &&			   \
1033     (int) ((t)->bottom - (t)->top) > 0)
1034
1035struct pixman_span_fix
1036{
1037    pixman_fixed_t	l, r, y;
1038};
1039
1040struct pixman_trap
1041{
1042    pixman_span_fix_t	top, bot;
1043};
1044
1045pixman_fixed_t pixman_sample_ceil_y        (pixman_fixed_t             y,
1046					    int                        bpp);
1047pixman_fixed_t pixman_sample_floor_y       (pixman_fixed_t             y,
1048					    int                        bpp);
1049void           pixman_edge_step            (pixman_edge_t             *e,
1050					    int                        n);
1051void           pixman_edge_init            (pixman_edge_t             *e,
1052					    int                        bpp,
1053					    pixman_fixed_t             y_start,
1054					    pixman_fixed_t             x_top,
1055					    pixman_fixed_t             y_top,
1056					    pixman_fixed_t             x_bot,
1057					    pixman_fixed_t             y_bot);
1058void           pixman_line_fixed_edge_init (pixman_edge_t             *e,
1059					    int                        bpp,
1060					    pixman_fixed_t             y,
1061					    const pixman_line_fixed_t *line,
1062					    int                        x_off,
1063					    int                        y_off);
1064void           pixman_rasterize_edges      (pixman_image_t            *image,
1065					    pixman_edge_t             *l,
1066					    pixman_edge_t             *r,
1067					    pixman_fixed_t             t,
1068					    pixman_fixed_t             b);
1069void           pixman_add_traps            (pixman_image_t            *image,
1070					    int16_t                    x_off,
1071					    int16_t                    y_off,
1072					    int                        ntrap,
1073					    const pixman_trap_t       *traps);
1074void           pixman_add_trapezoids       (pixman_image_t            *image,
1075					    int16_t                    x_off,
1076					    int                        y_off,
1077					    int                        ntraps,
1078					    const pixman_trapezoid_t  *traps);
1079void           pixman_rasterize_trapezoid  (pixman_image_t            *image,
1080					    const pixman_trapezoid_t  *trap,
1081					    int                        x_off,
1082					    int                        y_off);
1083void          pixman_composite_trapezoids (pixman_op_t		       op,
1084					   pixman_image_t *	       src,
1085					   pixman_image_t *	       dst,
1086					   pixman_format_code_t	       mask_format,
1087					   int			       x_src,
1088					   int			       y_src,
1089					   int			       x_dst,
1090					   int			       y_dst,
1091					   int			       n_traps,
1092					   const pixman_trapezoid_t *  traps);
1093void          pixman_composite_triangles (pixman_op_t		       op,
1094					  pixman_image_t *	       src,
1095					  pixman_image_t *	       dst,
1096					  pixman_format_code_t	       mask_format,
1097					  int			       x_src,
1098					  int			       y_src,
1099					  int			       x_dst,
1100					  int			       y_dst,
1101					  int			       n_tris,
1102					  const pixman_triangle_t *    tris);
1103void	      pixman_add_triangles       (pixman_image_t              *image,
1104					  int32_t	               x_off,
1105					  int32_t	               y_off,
1106					  int	                       n_tris,
1107					  const pixman_triangle_t     *tris);
1108
1109PIXMAN_END_DECLS
1110
1111#endif /* PIXMAN_H__ */
1112