summaryrefslogtreecommitdiffstats
path: root/gfx/cairo/libpixman/src/pixman-private.h
blob: 6af073b55acaee1e1a72045e4cf53d5f4a611f2e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
#ifndef PIXMAN_PRIVATE_H
#define PIXMAN_PRIVATE_H

/*
 * The defines which are shared between C and assembly code
 */

/* bilinear interpolation precision (must be <= 8) */
#ifndef MOZILLA_VERSION
#error "Need mozilla headers"
#endif
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
#define LOW_QUALITY_INTERPOLATION
#define LOWER_QUALITY_INTERPOLATION
#define BILINEAR_INTERPOLATION_BITS 4
#else
#define BILINEAR_INTERPOLATION_BITS 7
#endif
#define BILINEAR_INTERPOLATION_RANGE (1 << BILINEAR_INTERPOLATION_BITS)

/*
 * C specific part
 */

#ifndef __ASSEMBLER__

#ifndef PACKAGE
#  error config.h must be included before pixman-private.h
#endif

#define PIXMAN_DISABLE_DEPRECATED
#define PIXMAN_USE_INTERNAL_API

#include "pixman.h"
#include <time.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <stddef.h>

#include "pixman-compiler.h"

/*
 * Images
 */
typedef struct image_common image_common_t;
typedef struct solid_fill solid_fill_t;
typedef struct gradient gradient_t;
typedef struct linear_gradient linear_gradient_t;
typedef struct horizontal_gradient horizontal_gradient_t;
typedef struct vertical_gradient vertical_gradient_t;
typedef struct conical_gradient conical_gradient_t;
typedef struct radial_gradient radial_gradient_t;
typedef struct bits_image bits_image_t;
typedef struct circle circle_t;

typedef struct argb_t argb_t;

struct argb_t
{
    float a;
    float r;
    float g;
    float b;
};

typedef void (*fetch_scanline_t) (pixman_image_t *image,
				  int             x,
				  int             y,
				  int             width,
				  uint32_t       *buffer,
				  const uint32_t *mask);

typedef uint32_t (*fetch_pixel_32_t) (bits_image_t *image,
				      int           x,
				      int           y);

typedef argb_t (*fetch_pixel_float_t) (bits_image_t *image,
				       int           x,
				       int           y);

typedef void (*store_scanline_t) (bits_image_t *  image,
				  int             x,
				  int             y,
				  int             width,
				  const uint32_t *values);

typedef enum
{
    BITS,
    LINEAR,
    CONICAL,
    RADIAL,
    SOLID
} image_type_t;

typedef void (*property_changed_func_t) (pixman_image_t *image);

struct image_common
{
    image_type_t                type;
    int32_t                     ref_count;
    pixman_region32_t           clip_region;
    int32_t			alpha_count;	    /* How many times this image is being used as an alpha map */
    pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
    pixman_bool_t               client_clip;        /* Whether the source clip was
						       set by a client */
    pixman_bool_t               clip_sources;       /* Whether the clip applies when
						     * the image is used as a source
						     */
    pixman_bool_t		dirty;
    pixman_transform_t *        transform;
    pixman_repeat_t             repeat;
    pixman_filter_t             filter;
    pixman_fixed_t *            filter_params;
    int                         n_filter_params;
    bits_image_t *              alpha_map;
    int                         alpha_origin_x;
    int                         alpha_origin_y;
    pixman_bool_t               component_alpha;
    property_changed_func_t     property_changed;

    pixman_image_destroy_func_t destroy_func;
    void *                      destroy_data;

    uint32_t			flags;
    pixman_format_code_t	extended_format_code;
};

struct solid_fill
{
    image_common_t common;
    pixman_color_t color;

    uint32_t	   color_32;
    argb_t	   color_float;
};

struct gradient
{
    image_common_t	    common;
    int                     n_stops;
    pixman_gradient_stop_t *stops;
};

struct linear_gradient
{
    gradient_t           common;
    pixman_point_fixed_t p1;
    pixman_point_fixed_t p2;
};

struct circle
{
    pixman_fixed_t x;
    pixman_fixed_t y;
    pixman_fixed_t radius;
};

struct radial_gradient
{
    gradient_t common;

    circle_t   c1;
    circle_t   c2;

    circle_t   delta;
    double     a;
    double     inva;
    double     mindr;
};

struct conical_gradient
{
    gradient_t           common;
    pixman_point_fixed_t center;
    double		 angle;
};

struct bits_image
{
    image_common_t             common;
    pixman_format_code_t       format;
    const pixman_indexed_t *   indexed;
    int                        width;
    int                        height;
    uint32_t *                 bits;
    uint32_t *                 free_me;
    int                        rowstride;  /* in number of uint32_t's */

    fetch_scanline_t           fetch_scanline_16;

    fetch_scanline_t           fetch_scanline_32;
    fetch_pixel_32_t	       fetch_pixel_32;
    store_scanline_t           store_scanline_32;

    fetch_scanline_t	       fetch_scanline_float;
    fetch_pixel_float_t	       fetch_pixel_float;
    store_scanline_t           store_scanline_float;

    store_scanline_t           store_scanline_16;

    /* Used for indirect access to the bits */
    pixman_read_memory_func_t  read_func;
    pixman_write_memory_func_t write_func;
};

union pixman_image
{
    image_type_t       type;
    image_common_t     common;
    bits_image_t       bits;
    gradient_t         gradient;
    linear_gradient_t  linear;
    conical_gradient_t conical;
    radial_gradient_t  radial;
    solid_fill_t       solid;
};

typedef struct pixman_iter_t pixman_iter_t;
typedef uint32_t *(* pixman_iter_get_scanline_t) (pixman_iter_t *iter, const uint32_t *mask);
typedef void      (* pixman_iter_write_back_t)   (pixman_iter_t *iter);

typedef enum
{
    ITER_NARROW =		(1 << 0),

    /* "Localized alpha" is when the alpha channel is used only to compute
     * the alpha value of the destination. This means that the computation
     * of the RGB values of the result is independent of the alpha value.
     *
     * For example, the OVER operator has localized alpha for the
     * destination, because the RGB values of the result can be computed
     * without knowing the destination alpha. Similarly, ADD has localized
     * alpha for both source and destination because the RGB values of the
     * result can be computed without knowing the alpha value of source or
     * destination.
     *
     * When he destination is xRGB, this is useful knowledge, because then
     * we can treat it as if it were ARGB, which means in some cases we can
     * avoid copying it to a temporary buffer.
     */
    ITER_LOCALIZED_ALPHA =	(1 << 1),
    ITER_IGNORE_ALPHA =		(1 << 2),
    ITER_IGNORE_RGB =		(1 << 3),

    /* With the addition of ITER_16 we now have two flags that to represent
     * 3 pipelines. This means that there can be an invalid state when
     * both ITER_NARROW and ITER_16 are set. In this case
     * ITER_16 overrides NARROW and we should use the 16 bit pipeline.
     * Note: ITER_16 still has a 32 bit mask, which is a bit weird. */
    ITER_16 =			(1 << 4)
} iter_flags_t;

struct pixman_iter_t
{
    /* These are initialized by _pixman_implementation_{src,dest}_init */
    pixman_image_t *		image;
    uint32_t *			buffer;
    int				x, y;
    int				width;
    int				height;
    iter_flags_t		iter_flags;
    uint32_t			image_flags;

    /* These function pointers are initialized by the implementation */
    pixman_iter_get_scanline_t	get_scanline;
    pixman_iter_write_back_t	write_back;

    /* These fields are scratch data that implementations can use */
    void *			data;
    uint8_t *			bits;
    int				stride;
};

void
_pixman_bits_image_setup_accessors (bits_image_t *image);

void
_pixman_bits_image_src_iter_init (pixman_image_t *image, pixman_iter_t *iter);

void
_pixman_bits_image_dest_iter_init (pixman_image_t *image, pixman_iter_t *iter);

void
_pixman_linear_gradient_iter_init (pixman_image_t *image, pixman_iter_t  *iter);

void
_pixman_radial_gradient_iter_init (pixman_image_t *image, pixman_iter_t *iter);

void
_pixman_conical_gradient_iter_init (pixman_image_t *image, pixman_iter_t *iter);

void
_pixman_image_init (pixman_image_t *image);

pixman_bool_t
_pixman_bits_image_init (pixman_image_t *     image,
                         pixman_format_code_t format,
                         int                  width,
                         int                  height,
                         uint32_t *           bits,
                         int                  rowstride,
			 pixman_bool_t	      clear);
pixman_bool_t
_pixman_image_fini (pixman_image_t *image);

pixman_image_t *
_pixman_image_allocate (void);

pixman_bool_t
_pixman_init_gradient (gradient_t *                  gradient,
                       const pixman_gradient_stop_t *stops,
                       int                           n_stops);
void
_pixman_image_reset_clip_region (pixman_image_t *image);

void
_pixman_image_validate (pixman_image_t *image);

#define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul)	\
    do									\
    {									\
	uint32_t *__bits__;						\
	int       __stride__;						\
        								\
	__bits__ = image->bits.bits;					\
	__stride__ = image->bits.rowstride;				\
	(out_stride) =							\
	    __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type);	\
	(line) =							\
	    ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);	\
    } while (0)

/*
 * Gradient walker
 */
typedef struct
{
    uint32_t                left_ag;
    uint32_t                left_rb;
    uint32_t                right_ag;
    uint32_t                right_rb;
    pixman_fixed_t	    left_x;
    pixman_fixed_t          right_x;
    pixman_fixed_t          stepper;

    pixman_gradient_stop_t *stops;
    int                     num_stops;
    pixman_repeat_t	    repeat;

    pixman_bool_t           need_reset;
} pixman_gradient_walker_t;

void
_pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
                              gradient_t *              gradient,
			      pixman_repeat_t           repeat);

void
_pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
                               pixman_fixed_48_16_t      pos);

uint32_t
_pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
                               pixman_fixed_48_16_t      x);

/*
 * Edges
 */

#define MAX_ALPHA(n)    ((1 << (n)) - 1)
#define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
#define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)

#define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
#define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))

#define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
#define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))

#define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
#define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))

#define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
#define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))

#define RENDER_SAMPLES_X(x, n)						\
    ((n) == 1? 0 : (pixman_fixed_frac (x) +				\
		    X_FRAC_FIRST (n)) / STEP_X_SMALL (n))

void
pixman_rasterize_edges_accessors (pixman_image_t *image,
                                  pixman_edge_t * l,
                                  pixman_edge_t * r,
                                  pixman_fixed_t  t,
                                  pixman_fixed_t  b);

/*
 * Implementations
 */
typedef struct pixman_implementation_t pixman_implementation_t;

typedef struct
{
    pixman_op_t              op;
    pixman_image_t *         src_image;
    pixman_image_t *         mask_image;
    pixman_image_t *         dest_image;
    int32_t                  src_x;
    int32_t                  src_y;
    int32_t                  mask_x;
    int32_t                  mask_y;
    int32_t                  dest_x;
    int32_t                  dest_y;
    int32_t                  width;
    int32_t                  height;

    uint32_t                 src_flags;
    uint32_t                 mask_flags;
    uint32_t                 dest_flags;
} pixman_composite_info_t;

#define PIXMAN_COMPOSITE_ARGS(info)					\
    MAYBE_UNUSED pixman_op_t        op = info->op;			\
    MAYBE_UNUSED pixman_image_t *   src_image = info->src_image;	\
    MAYBE_UNUSED pixman_image_t *   mask_image = info->mask_image;	\
    MAYBE_UNUSED pixman_image_t *   dest_image = info->dest_image;	\
    MAYBE_UNUSED int32_t            src_x = info->src_x;		\
    MAYBE_UNUSED int32_t            src_y = info->src_y;		\
    MAYBE_UNUSED int32_t            mask_x = info->mask_x;		\
    MAYBE_UNUSED int32_t            mask_y = info->mask_y;		\
    MAYBE_UNUSED int32_t            dest_x = info->dest_x;		\
    MAYBE_UNUSED int32_t            dest_y = info->dest_y;		\
    MAYBE_UNUSED int32_t            width = info->width;		\
    MAYBE_UNUSED int32_t            height = info->height

typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
					  pixman_op_t              op,
					  uint32_t *               dest,
					  const uint32_t *         src,
					  const uint32_t *         mask,
					  int                      width);

typedef void (*pixman_combine_float_func_t) (pixman_implementation_t *imp,
					     pixman_op_t	      op,
					     float *		      dest,
					     const float *	      src,
					     const float *	      mask,
					     int		      n_pixels);

typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
					 pixman_composite_info_t *info);
typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
					    uint32_t *               src_bits,
					    uint32_t *               dst_bits,
					    int                      src_stride,
					    int                      dst_stride,
					    int                      src_bpp,
					    int                      dst_bpp,
					    int                      src_x,
					    int                      src_y,
					    int                      dest_x,
					    int                      dest_y,
					    int                      width,
					    int                      height);
typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
					     uint32_t *               bits,
					     int                      stride,
					     int                      bpp,
					     int                      x,
					     int                      y,
					     int                      width,
					     int                      height,
					     uint32_t                 filler);
typedef pixman_bool_t (*pixman_iter_init_func_t) (pixman_implementation_t *imp,
						  pixman_iter_t           *iter);

void _pixman_setup_combiner_functions_16 (pixman_implementation_t *imp);
void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
void _pixman_setup_combiner_functions_float (pixman_implementation_t *imp);

typedef struct
{
    pixman_op_t             op;
    pixman_format_code_t    src_format;
    uint32_t		    src_flags;
    pixman_format_code_t    mask_format;
    uint32_t		    mask_flags;
    pixman_format_code_t    dest_format;
    uint32_t		    dest_flags;
    pixman_composite_func_t func;
} pixman_fast_path_t;

struct pixman_implementation_t
{
    pixman_implementation_t *	toplevel;
    pixman_implementation_t *	fallback;
    const pixman_fast_path_t *	fast_paths;

    pixman_blt_func_t		blt;
    pixman_fill_func_t		fill;
    pixman_iter_init_func_t     src_iter_init;
    pixman_iter_init_func_t     dest_iter_init;

    pixman_combine_32_func_t	combine_16[PIXMAN_N_OPERATORS];
    pixman_combine_32_func_t	combine_16_ca[PIXMAN_N_OPERATORS];
    pixman_combine_32_func_t	combine_32[PIXMAN_N_OPERATORS];
    pixman_combine_32_func_t	combine_32_ca[PIXMAN_N_OPERATORS];
    pixman_combine_float_func_t	combine_float[PIXMAN_N_OPERATORS];
    pixman_combine_float_func_t	combine_float_ca[PIXMAN_N_OPERATORS];
};

uint32_t
_pixman_image_get_solid (pixman_implementation_t *imp,
			 pixman_image_t *         image,
                         pixman_format_code_t     format);

pixman_implementation_t *
_pixman_implementation_create (pixman_implementation_t *fallback,
			       const pixman_fast_path_t *fast_paths);

void
_pixman_implementation_lookup_composite (pixman_implementation_t  *toplevel,
					 pixman_op_t               op,
					 pixman_format_code_t      src_format,
					 uint32_t                  src_flags,
					 pixman_format_code_t      mask_format,
					 uint32_t                  mask_flags,
					 pixman_format_code_t      dest_format,
					 uint32_t                  dest_flags,
					 pixman_implementation_t **out_imp,
					 pixman_composite_func_t  *out_func);

pixman_combine_32_func_t
_pixman_implementation_lookup_combiner (pixman_implementation_t *imp,
					pixman_op_t		 op,
					pixman_bool_t		 component_alpha,
					pixman_bool_t		 wide,
					pixman_bool_t		 rgb16);

pixman_bool_t
_pixman_implementation_blt (pixman_implementation_t *imp,
                            uint32_t *               src_bits,
                            uint32_t *               dst_bits,
                            int                      src_stride,
                            int                      dst_stride,
                            int                      src_bpp,
                            int                      dst_bpp,
                            int                      src_x,
                            int                      src_y,
                            int                      dest_x,
                            int                      dest_y,
                            int                      width,
                            int                      height);

pixman_bool_t
_pixman_implementation_fill (pixman_implementation_t *imp,
                             uint32_t *               bits,
                             int                      stride,
                             int                      bpp,
                             int                      x,
                             int                      y,
                             int                      width,
                             int                      height,
                             uint32_t                 filler);

pixman_bool_t
_pixman_implementation_src_iter_init (pixman_implementation_t       *imp,
				      pixman_iter_t                 *iter,
				      pixman_image_t                *image,
				      int                            x,
				      int                            y,
				      int                            width,
				      int                            height,
				      uint8_t                       *buffer,
				      iter_flags_t                   flags,
				      uint32_t                       image_flags);

pixman_bool_t
_pixman_implementation_dest_iter_init (pixman_implementation_t       *imp,
				       pixman_iter_t                 *iter,
				       pixman_image_t                *image,
				       int                            x,
				       int                            y,
				       int                            width,
				       int                            height,
				       uint8_t                       *buffer,
				       iter_flags_t                   flags,
				       uint32_t                       image_flags);

/* Specific implementations */
pixman_implementation_t *
_pixman_implementation_create_general (void);

pixman_implementation_t *
_pixman_implementation_create_fast_path (pixman_implementation_t *fallback);

pixman_implementation_t *
_pixman_implementation_create_noop (pixman_implementation_t *fallback);

#if defined USE_X86_MMX || defined USE_ARM_IWMMXT || defined USE_LOONGSON_MMI
pixman_implementation_t *
_pixman_implementation_create_mmx (pixman_implementation_t *fallback);
#endif

#ifdef USE_SSE2
pixman_implementation_t *
_pixman_implementation_create_sse2 (pixman_implementation_t *fallback);
#endif

#ifdef USE_ARM_SIMD
pixman_implementation_t *
_pixman_implementation_create_arm_simd (pixman_implementation_t *fallback);
#endif

#ifdef USE_ARM_NEON
pixman_implementation_t *
_pixman_implementation_create_arm_neon (pixman_implementation_t *fallback);
#endif

#ifdef USE_MIPS_DSPR2
pixman_implementation_t *
_pixman_implementation_create_mips_dspr2 (pixman_implementation_t *fallback);
#endif

#ifdef USE_VMX
pixman_implementation_t *
_pixman_implementation_create_vmx (pixman_implementation_t *fallback);
#endif

pixman_bool_t
_pixman_implementation_disabled (const char *name);

pixman_implementation_t *
_pixman_x86_get_implementations (pixman_implementation_t *imp);

pixman_implementation_t *
_pixman_arm_get_implementations (pixman_implementation_t *imp);

pixman_implementation_t *
_pixman_ppc_get_implementations (pixman_implementation_t *imp);

pixman_implementation_t *
_pixman_mips_get_implementations (pixman_implementation_t *imp);

pixman_implementation_t *
_pixman_choose_implementation (void);

pixman_bool_t
_pixman_disabled (const char *name);


/*
 * Utilities
 */
pixman_bool_t
_pixman_compute_composite_region32 (pixman_region32_t * region,
				    pixman_image_t *    src_image,
				    pixman_image_t *    mask_image,
				    pixman_image_t *    dest_image,
				    int32_t             src_x,
				    int32_t             src_y,
				    int32_t             mask_x,
				    int32_t             mask_y,
				    int32_t             dest_x,
				    int32_t             dest_y,
				    int32_t             width,
				    int32_t             height);
uint32_t *
_pixman_iter_get_scanline_noop (pixman_iter_t *iter, const uint32_t *mask);

/* These "formats" all have depth 0, so they
 * will never clash with any real ones
 */
#define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
#define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
#define PIXMAN_pixbuf		PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
#define PIXMAN_rpixbuf		PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
#define PIXMAN_unknown		PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
#define PIXMAN_any		PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)

#define PIXMAN_OP_any		(PIXMAN_N_OPERATORS + 1)

#define FAST_PATH_ID_TRANSFORM			(1 <<  0)
#define FAST_PATH_NO_ALPHA_MAP			(1 <<  1)
#define FAST_PATH_NO_CONVOLUTION_FILTER		(1 <<  2)
#define FAST_PATH_NO_PAD_REPEAT			(1 <<  3)
#define FAST_PATH_NO_REFLECT_REPEAT		(1 <<  4)
#define FAST_PATH_NO_ACCESSORS			(1 <<  5)
#define FAST_PATH_NARROW_FORMAT			(1 <<  6)
#define FAST_PATH_COMPONENT_ALPHA		(1 <<  8)
#define FAST_PATH_SAMPLES_OPAQUE		(1 <<  7)
#define FAST_PATH_UNIFIED_ALPHA			(1 <<  9)
#define FAST_PATH_SCALE_TRANSFORM		(1 << 10)
#define FAST_PATH_NEAREST_FILTER		(1 << 11)
#define FAST_PATH_HAS_TRANSFORM			(1 << 12)
#define FAST_PATH_IS_OPAQUE			(1 << 13)
#define FAST_PATH_NO_NORMAL_REPEAT		(1 << 14)
#define FAST_PATH_NO_NONE_REPEAT		(1 << 15)
#define FAST_PATH_X_UNIT_POSITIVE		(1 << 16)
#define FAST_PATH_AFFINE_TRANSFORM		(1 << 17)
#define FAST_PATH_Y_UNIT_ZERO			(1 << 18)
#define FAST_PATH_BILINEAR_FILTER		(1 << 19)
#define FAST_PATH_ROTATE_90_TRANSFORM		(1 << 20)
#define FAST_PATH_ROTATE_180_TRANSFORM		(1 << 21)
#define FAST_PATH_ROTATE_270_TRANSFORM		(1 << 22)
#define FAST_PATH_SAMPLES_COVER_CLIP_NEAREST	(1 << 23)
#define FAST_PATH_SAMPLES_COVER_CLIP_BILINEAR	(1 << 24)
#define FAST_PATH_BITS_IMAGE			(1 << 25)
#define FAST_PATH_SEPARABLE_CONVOLUTION_FILTER  (1 << 26)
#define FAST_PATH_16_FORMAT			(1 << 27)

#define FAST_PATH_PAD_REPEAT						\
    (FAST_PATH_NO_NONE_REPEAT		|				\
     FAST_PATH_NO_NORMAL_REPEAT		|				\
     FAST_PATH_NO_REFLECT_REPEAT)

#define FAST_PATH_NORMAL_REPEAT						\
    (FAST_PATH_NO_NONE_REPEAT		|				\
     FAST_PATH_NO_PAD_REPEAT		|				\
     FAST_PATH_NO_REFLECT_REPEAT)

#define FAST_PATH_NONE_REPEAT						\
    (FAST_PATH_NO_NORMAL_REPEAT		|				\
     FAST_PATH_NO_PAD_REPEAT		|				\
     FAST_PATH_NO_REFLECT_REPEAT)

#define FAST_PATH_REFLECT_REPEAT					\
    (FAST_PATH_NO_NONE_REPEAT		|				\
     FAST_PATH_NO_NORMAL_REPEAT		|				\
     FAST_PATH_NO_PAD_REPEAT)

#define FAST_PATH_STANDARD_FLAGS					\
    (FAST_PATH_NO_CONVOLUTION_FILTER	|				\
     FAST_PATH_NO_ACCESSORS		|				\
     FAST_PATH_NO_ALPHA_MAP		|				\
     FAST_PATH_NARROW_FORMAT)

#define FAST_PATH_STD_DEST_FLAGS					\
    (FAST_PATH_NO_ACCESSORS		|				\
     FAST_PATH_NO_ALPHA_MAP		|				\
     FAST_PATH_NARROW_FORMAT)

#define SOURCE_FLAGS(format)						\
    (FAST_PATH_STANDARD_FLAGS |						\
     ((PIXMAN_ ## format == PIXMAN_solid) ?				\
      0 : (FAST_PATH_SAMPLES_COVER_CLIP_NEAREST | FAST_PATH_NEAREST_FILTER | FAST_PATH_ID_TRANSFORM)))

#define MASK_FLAGS(format, extra)					\
    ((PIXMAN_ ## format == PIXMAN_null) ? 0 : (SOURCE_FLAGS (format) | extra))

#define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
    PIXMAN_OP_ ## op,							\
    PIXMAN_ ## src,							\
    src_flags,							        \
    PIXMAN_ ## mask,						        \
    mask_flags,							        \
    PIXMAN_ ## dest,	                                                \
    dest_flags,							        \
    func

#define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)			\
    { FAST_PATH (							\
	    op,								\
	    src,  SOURCE_FLAGS (src),					\
	    mask, MASK_FLAGS (mask, FAST_PATH_UNIFIED_ALPHA),		\
	    dest, FAST_PATH_STD_DEST_FLAGS,				\
	    func) }

#define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)		\
    { FAST_PATH (							\
	    op,								\
	    src,  SOURCE_FLAGS (src),					\
	    mask, MASK_FLAGS (mask, FAST_PATH_COMPONENT_ALPHA),		\
	    dest, FAST_PATH_STD_DEST_FLAGS,				\
	    func) }

extern pixman_implementation_t *global_implementation;

static force_inline pixman_implementation_t *
get_implementation (void)
{
#ifndef TOOLCHAIN_SUPPORTS_ATTRIBUTE_CONSTRUCTOR
    if (!global_implementation)
	global_implementation = _pixman_choose_implementation ();
#endif
    return global_implementation;
}

/* This function is exported for the sake of the test suite and not part
 * of the ABI.
 */
PIXMAN_EXPORT pixman_implementation_t *
_pixman_internal_only_get_implementation (void);

/* Memory allocation helpers */
void *
pixman_malloc_ab (unsigned int n, unsigned int b);

void *
pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);

pixman_bool_t
_pixman_multiply_overflows_size (size_t a, size_t b);

pixman_bool_t
_pixman_multiply_overflows_int (unsigned int a, unsigned int b);

pixman_bool_t
_pixman_addition_overflows_int (unsigned int a, unsigned int b);

/* Compositing utilities */
void
pixman_expand_to_float (argb_t               *dst,
			const uint32_t       *src,
			pixman_format_code_t  format,
			int                   width);

void
pixman_contract_from_float (uint32_t     *dst,
			    const argb_t *src,
			    int           width);

/* Region Helpers */
pixman_bool_t
pixman_region32_copy_from_region16 (pixman_region32_t *dst,
                                    pixman_region16_t *src);

pixman_bool_t
pixman_region16_copy_from_region32 (pixman_region16_t *dst,
                                    pixman_region32_t *src);

/* Doubly linked lists */
typedef struct pixman_link_t pixman_link_t;
struct pixman_link_t
{
    pixman_link_t *next;
    pixman_link_t *prev;
};

typedef struct pixman_list_t pixman_list_t;
struct pixman_list_t
{
    pixman_link_t *head;
    pixman_link_t *tail;
};

static force_inline void
pixman_list_init (pixman_list_t *list)
{
    list->head = (pixman_link_t *)list;
    list->tail = (pixman_link_t *)list;
}

static force_inline void
pixman_list_prepend (pixman_list_t *list, pixman_link_t *link)
{
    link->next = list->head;
    link->prev = (pixman_link_t *)list;
    list->head->prev = link;
    list->head = link;
}

static force_inline void
pixman_list_unlink (pixman_link_t *link)
{
    link->prev->next = link->next;
    link->next->prev = link->prev;
}

static force_inline void
pixman_list_move_to_front (pixman_list_t *list, pixman_link_t *link)
{
    pixman_list_unlink (link);
    pixman_list_prepend (list, link);
}

/* Misc macros */

#ifndef FALSE
#   define FALSE 0
#endif

#ifndef TRUE
#   define TRUE 1
#endif

#ifndef MIN
#  define MIN(a, b) ((a < b) ? a : b)
#endif

#ifndef MAX
#  define MAX(a, b) ((a > b) ? a : b)
#endif

/* Integer division that rounds towards -infinity */
#define DIV(a, b)					   \
    ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
     ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))

/* Modulus that produces the remainder wrt. DIV */
#define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))

#define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))

/* Conversion between 8888 and 0565 */

static force_inline uint16_t
convert_8888_to_0565 (uint32_t s)
{
    /* The following code can be compiled into just 4 instructions on ARM */
    uint32_t a, b;
    a = (s >> 3) & 0x1F001F;
    b = s & 0xFC00;
    a |= a >> 5;
    a |= b >> 5;
    return (uint16_t)a;
}

static force_inline uint32_t
convert_0565_to_0888 (uint16_t s)
{
    return (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |
            ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |
            ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)));
}

static force_inline uint32_t
convert_0565_to_8888 (uint16_t s)
{
    return convert_0565_to_0888 (s) | 0xff000000;
}

/* Trivial versions that are useful in macros */

static force_inline uint32_t
convert_8888_to_8888 (uint32_t s)
{
    return s;
}

static force_inline uint32_t
convert_x888_to_8888 (uint32_t s)
{
    return s | 0xff000000;
}

static force_inline uint16_t
convert_0565_to_0565 (uint16_t s)
{
    return s;
}

#define PIXMAN_FORMAT_IS_WIDE(f)					\
    (PIXMAN_FORMAT_A (f) > 8 ||						\
     PIXMAN_FORMAT_R (f) > 8 ||						\
     PIXMAN_FORMAT_G (f) > 8 ||						\
     PIXMAN_FORMAT_B (f) > 8 ||						\
     PIXMAN_FORMAT_TYPE (f) == PIXMAN_TYPE_ARGB_SRGB)

#ifdef WORDS_BIGENDIAN
#   define SCREEN_SHIFT_LEFT(x,n)	((x) << (n))
#   define SCREEN_SHIFT_RIGHT(x,n)	((x) >> (n))
#else
#   define SCREEN_SHIFT_LEFT(x,n)	((x) >> (n))
#   define SCREEN_SHIFT_RIGHT(x,n)	((x) << (n))
#endif

static force_inline uint32_t
unorm_to_unorm (uint32_t val, int from_bits, int to_bits)
{
    uint32_t result;

    if (from_bits == 0)
	return 0;

    /* Delete any extra bits */
    val &= ((1 << from_bits) - 1);

    if (from_bits >= to_bits)
	return val >> (from_bits - to_bits);

    /* Start out with the high bit of val in the high bit of result. */
    result = val << (to_bits - from_bits);

    /* Copy the bits in result, doubling the number of bits each time, until
     * we fill all to_bits. Unrolled manually because from_bits and to_bits
     * are usually known statically, so the compiler can turn all of this
     * into a few shifts.
     */
#define REPLICATE()							\
    do									\
    {									\
	if (from_bits < to_bits)					\
	{								\
	    result |= result >> from_bits;				\
									\
	    from_bits *= 2;						\
	}								\
    }									\
    while (0)

    REPLICATE();
    REPLICATE();
    REPLICATE();
    REPLICATE();
    REPLICATE();

    return result;
}

uint16_t pixman_float_to_unorm (float f, int n_bits);
float pixman_unorm_to_float (uint16_t u, int n_bits);

/*
 * Various debugging code
 */

#undef DEBUG

#define COMPILE_TIME_ASSERT(x)						\
    do { typedef int compile_time_assertion [(x)?1:-1]; } while (0)

/* Turn on debugging depending on what type of release this is
 */
#if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))

/* Debugging gets turned on for development releases because these
 * are the things that end up in bleeding edge distributions such
 * as Rawhide etc.
 *
 * For performance reasons we don't turn it on for stable releases or
 * random git checkouts. (Random git checkouts are often used for
 * performance work).
 */

#    define DEBUG

#endif

#ifdef DEBUG

void
_pixman_log_error (const char *function, const char *message);

#define return_if_fail(expr)                                            \
    do                                                                  \
    {                                                                   \
	if (!(expr))							\
	{								\
	    _pixman_log_error (FUNC, "The expression " # expr " was false"); \
	    return;							\
	}								\
    }                                                                   \
    while (0)

#define return_val_if_fail(expr, retval)                                \
    do                                                                  \
    {                                                                   \
	if (!(expr))                                                    \
	{								\
	    _pixman_log_error (FUNC, "The expression " # expr " was false"); \
	    return (retval);						\
	}								\
    }                                                                   \
    while (0)

#define critical_if_fail(expr)						\
    do									\
    {									\
	if (!(expr))							\
	    _pixman_log_error (FUNC, "The expression " # expr " was false"); \
    }									\
    while (0)


#else

#define _pixman_log_error(f,m) do { } while (0)

#define return_if_fail(expr)						\
    do                                                                  \
    {                                                                   \
	if (!(expr))							\
	    return;							\
    }                                                                   \
    while (0)

#define return_val_if_fail(expr, retval)                                \
    do                                                                  \
    {                                                                   \
	if (!(expr))							\
	    return (retval);						\
    }                                                                   \
    while (0)

#define critical_if_fail(expr)						\
    do									\
    {									\
    }									\
    while (0)
#endif

/*
 * Matrix
 */

typedef struct { pixman_fixed_48_16_t v[3]; } pixman_vector_48_16_t;

pixman_bool_t
pixman_transform_point_31_16 (const pixman_transform_t    *t,
                              const pixman_vector_48_16_t *v,
                              pixman_vector_48_16_t       *result);

void
pixman_transform_point_31_16_3d (const pixman_transform_t    *t,
                                 const pixman_vector_48_16_t *v,
                                 pixman_vector_48_16_t       *result);

void
pixman_transform_point_31_16_affine (const pixman_transform_t    *t,
                                     const pixman_vector_48_16_t *v,
                                     pixman_vector_48_16_t       *result);

/*
 * Timers
 */

#ifdef PIXMAN_TIMERS

static inline uint64_t
oil_profile_stamp_rdtsc (void)
{
    uint32_t hi, lo;

    __asm__ __volatile__ ("rdtsc\n" : "=a" (lo), "=d" (hi));

    return lo | (((uint64_t)hi) << 32);
}

#define OIL_STAMP oil_profile_stamp_rdtsc

typedef struct pixman_timer_t pixman_timer_t;

struct pixman_timer_t
{
    int             initialized;
    const char *    name;
    uint64_t        n_times;
    uint64_t        total;
    pixman_timer_t *next;
};

extern int timer_defined;

void pixman_timer_register (pixman_timer_t *timer);

#define TIMER_BEGIN(tname)                                              \
    {                                                                   \
	static pixman_timer_t timer ## tname;                           \
	uint64_t              begin ## tname;                           \
        								\
	if (!timer ## tname.initialized)				\
	{                                                               \
	    timer ## tname.initialized = 1;				\
	    timer ## tname.name = # tname;				\
	    pixman_timer_register (&timer ## tname);			\
	}                                                               \
									\
	timer ## tname.n_times++;					\
	begin ## tname = OIL_STAMP ();

#define TIMER_END(tname)                                                \
    timer ## tname.total += OIL_STAMP () - begin ## tname;		\
    }

#else

#define TIMER_BEGIN(tname)
#define TIMER_END(tname)

#endif /* PIXMAN_TIMERS */

#endif /* __ASSEMBLER__ */

#endif /* PIXMAN_PRIVATE_H */