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
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
|
/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2000 Keith Packard
* Copyright © 2005 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Contributor(s):
* Graydon Hoare <graydon@redhat.com>
* Owen Taylor <otaylor@redhat.com>
* Keith Packard <keithp@keithp.com>
* Carl Worth <cworth@cworth.org>
*/
#define _BSD_SOURCE /* for strdup() */
#include "cairoint.h"
#include "cairo-error-private.h"
#include "cairo-image-surface-private.h"
#include "cairo-ft-private.h"
#include "cairo-pattern-private.h"
#include "cairo-pixman-private.h"
#include <float.h>
#include "cairo-fontconfig-private.h"
#include <ft2build.h>
#include FT_FREETYPE_H
#include FT_OUTLINE_H
#include FT_IMAGE_H
#include FT_BITMAP_H
#include FT_TRUETYPE_TABLES_H
#include FT_XFREE86_H
#if HAVE_FT_GLYPHSLOT_EMBOLDEN
#include FT_SYNTHESIS_H
#endif
#if HAVE_FT_LIBRARY_SETLCDFILTER
#include FT_LCD_FILTER_H
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#else
#define access(p, m) 0
#endif
/* Fontconfig version older than 2.6 didn't have these options */
#ifndef FC_LCD_FILTER
#define FC_LCD_FILTER "lcdfilter"
#endif
/* Some Ubuntu versions defined FC_LCD_FILTER without defining the following */
#ifndef FC_LCD_NONE
#define FC_LCD_NONE 0
#define FC_LCD_DEFAULT 1
#define FC_LCD_LIGHT 2
#define FC_LCD_LEGACY 3
#endif
/* FreeType version older than 2.3.5(?) didn't have these options */
#ifndef FT_LCD_FILTER_NONE
#define FT_LCD_FILTER_NONE 0
#define FT_LCD_FILTER_DEFAULT 1
#define FT_LCD_FILTER_LIGHT 2
#define FT_LCD_FILTER_LEGACY 16
#endif
#define DOUBLE_TO_26_6(d) ((FT_F26Dot6)((d) * 64.0))
#define DOUBLE_FROM_26_6(t) ((double)(t) / 64.0)
#define DOUBLE_TO_16_16(d) ((FT_Fixed)((d) * 65536.0))
#define DOUBLE_FROM_16_16(t) ((double)(t) / 65536.0)
/* This is the max number of FT_face objects we keep open at once
*/
#define MAX_OPEN_FACES 10
/**
* SECTION:cairo-ft
* @Title: FreeType Fonts
* @Short_Description: Font support for FreeType
* @See_Also: #cairo_font_face_t
*
* The FreeType font backend is primarily used to render text on GNU/Linux
* systems, but can be used on other platforms too.
**/
/**
* CAIRO_HAS_FT_FONT:
*
* Defined if the FreeType font backend is available.
* This macro can be used to conditionally compile backend-specific code.
*
* Since: 1.0
**/
/**
* CAIRO_HAS_FC_FONT:
*
* Defined if the Fontconfig-specific functions of the FreeType font backend
* are available.
* This macro can be used to conditionally compile backend-specific code.
*
* Since: 1.10
**/
/*
* The simple 2x2 matrix is converted into separate scale and shape
* factors so that hinting works right
*/
typedef struct _cairo_ft_font_transform {
double x_scale, y_scale;
double shape[2][2];
} cairo_ft_font_transform_t;
/*
* We create an object that corresponds to a single font on the disk;
* (identified by a filename/id pair) these are shared between all
* fonts using that file. For cairo_ft_font_face_create_for_ft_face(), we
* just create a one-off version with a permanent face value.
*/
typedef struct _cairo_ft_font_face cairo_ft_font_face_t;
struct _cairo_ft_unscaled_font {
cairo_unscaled_font_t base;
cairo_bool_t from_face; /* was the FT_Face provided by user? */
FT_Face face; /* provided or cached face */
/* only set if from_face is false */
char *filename;
int id;
/* We temporarily scale the unscaled font as needed */
cairo_bool_t have_scale;
cairo_matrix_t current_scale;
double x_scale; /* Extracted X scale factor */
double y_scale; /* Extracted Y scale factor */
cairo_bool_t have_shape; /* true if the current scale has a non-scale component*/
cairo_matrix_t current_shape;
FT_Matrix Current_Shape;
cairo_mutex_t mutex;
int lock_count;
cairo_ft_font_face_t *faces; /* Linked list of faces for this font */
};
static int
_cairo_ft_unscaled_font_keys_equal (const void *key_a,
const void *key_b);
static void
_cairo_ft_unscaled_font_fini (cairo_ft_unscaled_font_t *unscaled);
typedef struct _cairo_ft_options {
cairo_font_options_t base;
unsigned int load_flags; /* flags for FT_Load_Glyph */
unsigned int synth_flags;
} cairo_ft_options_t;
struct _cairo_ft_font_face {
cairo_font_face_t base;
cairo_ft_unscaled_font_t *unscaled;
cairo_ft_options_t ft_options;
cairo_ft_font_face_t *next;
#if CAIRO_HAS_FC_FONT
FcPattern *pattern; /* if pattern is set, the above fields will be NULL */
cairo_font_face_t *resolved_font_face;
FcConfig *resolved_config;
#endif
};
static const cairo_unscaled_font_backend_t cairo_ft_unscaled_font_backend;
#if CAIRO_HAS_FC_FONT
static cairo_status_t
_cairo_ft_font_options_substitute (const cairo_font_options_t *options,
FcPattern *pattern);
static cairo_font_face_t *
_cairo_ft_resolve_pattern (FcPattern *pattern,
const cairo_matrix_t *font_matrix,
const cairo_matrix_t *ctm,
const cairo_font_options_t *options);
#endif
static cairo_status_t
_ft_to_cairo_error (FT_Error error)
{
/* Currently we don't get many (any?) useful statuses here.
* Populate as needed. */
switch (error)
{
default: return CAIRO_STATUS_NO_MEMORY;
}
}
/*
* We maintain a hash table to map file/id => #cairo_ft_unscaled_font_t.
* The hash table itself isn't limited in size. However, we limit the
* number of FT_Face objects we keep around; when we've exceeded that
* limit and need to create a new FT_Face, we dump the FT_Face from a
* random #cairo_ft_unscaled_font_t which has an unlocked FT_Face, (if
* there are any).
*/
typedef struct _cairo_ft_unscaled_font_map {
cairo_hash_table_t *hash_table;
FT_Library ft_library;
int num_open_faces;
} cairo_ft_unscaled_font_map_t;
static cairo_ft_unscaled_font_map_t *cairo_ft_unscaled_font_map = NULL;
static FT_Face
_cairo_ft_unscaled_font_lock_face (cairo_ft_unscaled_font_t *unscaled);
static void
_cairo_ft_unscaled_font_unlock_face (cairo_ft_unscaled_font_t *unscaled);
static cairo_bool_t
_cairo_ft_scaled_font_is_vertical (cairo_scaled_font_t *scaled_font);
static void
_font_map_release_face_lock_held (cairo_ft_unscaled_font_map_t *font_map,
cairo_ft_unscaled_font_t *unscaled)
{
if (unscaled->face) {
FT_Done_Face (unscaled->face);
unscaled->face = NULL;
unscaled->have_scale = FALSE;
font_map->num_open_faces--;
}
}
static cairo_status_t
_cairo_ft_unscaled_font_map_create (void)
{
cairo_ft_unscaled_font_map_t *font_map;
/* This function is only intended to be called from
* _cairo_ft_unscaled_font_map_lock. So we'll crash if we can
* detect some other call path. */
assert (cairo_ft_unscaled_font_map == NULL);
font_map = malloc (sizeof (cairo_ft_unscaled_font_map_t));
if (unlikely (font_map == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
font_map->hash_table =
_cairo_hash_table_create (_cairo_ft_unscaled_font_keys_equal);
if (unlikely (font_map->hash_table == NULL))
goto FAIL;
if (unlikely (FT_Init_FreeType (&font_map->ft_library)))
goto FAIL;
font_map->num_open_faces = 0;
cairo_ft_unscaled_font_map = font_map;
return CAIRO_STATUS_SUCCESS;
FAIL:
if (font_map->hash_table)
_cairo_hash_table_destroy (font_map->hash_table);
free (font_map);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
static void
_cairo_ft_unscaled_font_map_pluck_entry (void *entry, void *closure)
{
cairo_ft_unscaled_font_t *unscaled = entry;
cairo_ft_unscaled_font_map_t *font_map = closure;
_cairo_hash_table_remove (font_map->hash_table,
&unscaled->base.hash_entry);
if (! unscaled->from_face)
_font_map_release_face_lock_held (font_map, unscaled);
_cairo_ft_unscaled_font_fini (unscaled);
free (unscaled);
}
static void
_cairo_ft_unscaled_font_map_destroy (void)
{
cairo_ft_unscaled_font_map_t *font_map;
CAIRO_MUTEX_LOCK (_cairo_ft_unscaled_font_map_mutex);
font_map = cairo_ft_unscaled_font_map;
cairo_ft_unscaled_font_map = NULL;
CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex);
if (font_map != NULL) {
_cairo_hash_table_foreach (font_map->hash_table,
_cairo_ft_unscaled_font_map_pluck_entry,
font_map);
assert (font_map->num_open_faces == 0);
FT_Done_FreeType (font_map->ft_library);
_cairo_hash_table_destroy (font_map->hash_table);
free (font_map);
}
}
static cairo_ft_unscaled_font_map_t *
_cairo_ft_unscaled_font_map_lock (void)
{
CAIRO_MUTEX_LOCK (_cairo_ft_unscaled_font_map_mutex);
if (unlikely (cairo_ft_unscaled_font_map == NULL)) {
if (unlikely (_cairo_ft_unscaled_font_map_create ())) {
CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex);
return NULL;
}
}
return cairo_ft_unscaled_font_map;
}
static void
_cairo_ft_unscaled_font_map_unlock (void)
{
CAIRO_MUTEX_UNLOCK (_cairo_ft_unscaled_font_map_mutex);
}
static void
_cairo_ft_unscaled_font_init_key (cairo_ft_unscaled_font_t *key,
cairo_bool_t from_face,
char *filename,
int id,
FT_Face face)
{
unsigned long hash;
key->from_face = from_face;
key->filename = filename;
key->id = id;
key->face = face;
hash = _cairo_hash_string (filename);
/* the constants are just arbitrary primes */
hash += ((unsigned long) id) * 1607;
hash += ((unsigned long) face) * 2137;
key->base.hash_entry.hash = hash;
}
/**
* _cairo_ft_unscaled_font_init:
*
* Initialize a #cairo_ft_unscaled_font_t.
*
* There are two basic flavors of #cairo_ft_unscaled_font_t, one
* created from an FT_Face and the other created from a filename/id
* pair. These two flavors are identified as from_face and !from_face.
*
* To initialize a from_face font, pass filename==%NULL, id=0 and the
* desired face.
*
* To initialize a !from_face font, pass the filename/id as desired
* and face==%NULL.
*
* Note that the code handles these two flavors in very distinct
* ways. For example there is a hash_table mapping
* filename/id->#cairo_unscaled_font_t in the !from_face case, but no
* parallel in the from_face case, (where the calling code would have
* to do its own mapping to ensure similar sharing).
**/
static cairo_status_t
_cairo_ft_unscaled_font_init (cairo_ft_unscaled_font_t *unscaled,
cairo_bool_t from_face,
const char *filename,
int id,
FT_Face face)
{
_cairo_unscaled_font_init (&unscaled->base,
&cairo_ft_unscaled_font_backend);
if (from_face) {
unscaled->from_face = TRUE;
_cairo_ft_unscaled_font_init_key (unscaled, TRUE, NULL, 0, face);
} else {
char *filename_copy;
unscaled->from_face = FALSE;
unscaled->face = NULL;
filename_copy = strdup (filename);
if (unlikely (filename_copy == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_ft_unscaled_font_init_key (unscaled, FALSE, filename_copy, id, NULL);
}
unscaled->have_scale = FALSE;
CAIRO_MUTEX_INIT (unscaled->mutex);
unscaled->lock_count = 0;
unscaled->faces = NULL;
return CAIRO_STATUS_SUCCESS;
}
/**
* _cairo_ft_unscaled_font_fini:
*
* Free all data associated with a #cairo_ft_unscaled_font_t.
*
* CAUTION: The unscaled->face field must be %NULL before calling this
* function. This is because the #cairo_ft_unscaled_font_t_map keeps a
* count of these faces (font_map->num_open_faces) so it maintains the
* unscaled->face field while it has its lock held. See
* _font_map_release_face_lock_held().
**/
static void
_cairo_ft_unscaled_font_fini (cairo_ft_unscaled_font_t *unscaled)
{
assert (unscaled->face == NULL);
free (unscaled->filename);
unscaled->filename = NULL;
CAIRO_MUTEX_FINI (unscaled->mutex);
}
static int
_cairo_ft_unscaled_font_keys_equal (const void *key_a,
const void *key_b)
{
const cairo_ft_unscaled_font_t *unscaled_a = key_a;
const cairo_ft_unscaled_font_t *unscaled_b = key_b;
if (unscaled_a->id == unscaled_b->id &&
unscaled_a->from_face == unscaled_b->from_face)
{
if (unscaled_a->from_face)
return unscaled_a->face == unscaled_b->face;
if (unscaled_a->filename == NULL && unscaled_b->filename == NULL)
return TRUE;
else if (unscaled_a->filename == NULL || unscaled_b->filename == NULL)
return FALSE;
else
return (strcmp (unscaled_a->filename, unscaled_b->filename) == 0);
}
return FALSE;
}
/* Finds or creates a #cairo_ft_unscaled_font_t for the filename/id from
* pattern. Returns a new reference to the unscaled font.
*/
static cairo_status_t
_cairo_ft_unscaled_font_create_internal (cairo_bool_t from_face,
char *filename,
int id,
FT_Face font_face,
cairo_ft_unscaled_font_t **out)
{
cairo_ft_unscaled_font_t key, *unscaled;
cairo_ft_unscaled_font_map_t *font_map;
cairo_status_t status;
font_map = _cairo_ft_unscaled_font_map_lock ();
if (unlikely (font_map == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_cairo_ft_unscaled_font_init_key (&key, from_face, filename, id, font_face);
/* Return existing unscaled font if it exists in the hash table. */
unscaled = _cairo_hash_table_lookup (font_map->hash_table,
&key.base.hash_entry);
if (unscaled != NULL) {
_cairo_unscaled_font_reference (&unscaled->base);
goto DONE;
}
/* Otherwise create it and insert into hash table. */
unscaled = malloc (sizeof (cairo_ft_unscaled_font_t));
if (unlikely (unscaled == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto UNWIND_FONT_MAP_LOCK;
}
status = _cairo_ft_unscaled_font_init (unscaled, from_face, filename, id, font_face);
if (unlikely (status))
goto UNWIND_UNSCALED_MALLOC;
assert (unscaled->base.hash_entry.hash == key.base.hash_entry.hash);
status = _cairo_hash_table_insert (font_map->hash_table,
&unscaled->base.hash_entry);
if (unlikely (status))
goto UNWIND_UNSCALED_FONT_INIT;
DONE:
_cairo_ft_unscaled_font_map_unlock ();
*out = unscaled;
return CAIRO_STATUS_SUCCESS;
UNWIND_UNSCALED_FONT_INIT:
_cairo_ft_unscaled_font_fini (unscaled);
UNWIND_UNSCALED_MALLOC:
free (unscaled);
UNWIND_FONT_MAP_LOCK:
_cairo_ft_unscaled_font_map_unlock ();
return status;
}
#if CAIRO_HAS_FC_FONT
static cairo_status_t
_cairo_ft_unscaled_font_create_for_pattern (FcPattern *pattern,
cairo_ft_unscaled_font_t **out)
{
FT_Face font_face = NULL;
char *filename = NULL;
int id = 0;
FcResult ret;
ret = FcPatternGetFTFace (pattern, FC_FT_FACE, 0, &font_face);
if (ret == FcResultMatch)
goto DONE;
if (ret == FcResultOutOfMemory)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
ret = FcPatternGetString (pattern, FC_FILE, 0, (FcChar8 **) &filename);
if (ret == FcResultOutOfMemory)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (ret == FcResultMatch) {
if (access (filename, R_OK) == 0) {
/* If FC_INDEX is not set, we just use 0 */
ret = FcPatternGetInteger (pattern, FC_INDEX, 0, &id);
if (ret == FcResultOutOfMemory)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto DONE;
} else
return _cairo_error (CAIRO_STATUS_FILE_NOT_FOUND);
}
/* The pattern contains neither a face nor a filename, resolve it later. */
*out = NULL;
return CAIRO_STATUS_SUCCESS;
DONE:
return _cairo_ft_unscaled_font_create_internal (font_face != NULL,
filename, id, font_face,
out);
}
#endif
static cairo_status_t
_cairo_ft_unscaled_font_create_from_face (FT_Face face,
cairo_ft_unscaled_font_t **out)
{
return _cairo_ft_unscaled_font_create_internal (TRUE, NULL, 0, face, out);
}
static cairo_bool_t
_cairo_ft_unscaled_font_destroy (void *abstract_font)
{
cairo_ft_unscaled_font_t *unscaled = abstract_font;
cairo_ft_unscaled_font_map_t *font_map;
font_map = _cairo_ft_unscaled_font_map_lock ();
/* All created objects must have been mapped in the font map. */
assert (font_map != NULL);
if (! _cairo_reference_count_dec_and_test (&unscaled->base.ref_count)) {
/* somebody recreated the font whilst we waited for the lock */
_cairo_ft_unscaled_font_map_unlock ();
return FALSE;
}
_cairo_hash_table_remove (font_map->hash_table,
&unscaled->base.hash_entry);
if (unscaled->from_face) {
/* See comments in _ft_font_face_destroy about the "zombie" state
* for a _ft_font_face.
*/
if (unscaled->faces && unscaled->faces->unscaled == NULL) {
assert (unscaled->faces->next == NULL);
cairo_font_face_destroy (&unscaled->faces->base);
}
} else {
_font_map_release_face_lock_held (font_map, unscaled);
}
unscaled->face = NULL;
_cairo_ft_unscaled_font_map_unlock ();
_cairo_ft_unscaled_font_fini (unscaled);
return TRUE;
}
static cairo_bool_t
_has_unlocked_face (const void *entry)
{
const cairo_ft_unscaled_font_t *unscaled = entry;
return (!unscaled->from_face && unscaled->lock_count == 0 && unscaled->face);
}
/* Ensures that an unscaled font has a face object. If we exceed
* MAX_OPEN_FACES, try to close some.
*
* This differs from _cairo_ft_scaled_font_lock_face in that it doesn't
* set the scale on the face, but just returns it at the last scale.
*/
static cairo_warn FT_Face
_cairo_ft_unscaled_font_lock_face (cairo_ft_unscaled_font_t *unscaled)
{
cairo_ft_unscaled_font_map_t *font_map;
FT_Face face = NULL;
FT_Error error;
CAIRO_MUTEX_LOCK (unscaled->mutex);
unscaled->lock_count++;
if (unscaled->face)
return unscaled->face;
/* If this unscaled font was created from an FT_Face then we just
* returned it above. */
assert (!unscaled->from_face);
font_map = _cairo_ft_unscaled_font_map_lock ();
{
assert (font_map != NULL);
while (font_map->num_open_faces >= MAX_OPEN_FACES)
{
cairo_ft_unscaled_font_t *entry;
entry = _cairo_hash_table_random_entry (font_map->hash_table,
_has_unlocked_face);
if (entry == NULL)
break;
_font_map_release_face_lock_held (font_map, entry);
}
}
_cairo_ft_unscaled_font_map_unlock ();
error = FT_New_Face (font_map->ft_library,
unscaled->filename,
unscaled->id,
&face);
if (error)
{
unscaled->lock_count--;
CAIRO_MUTEX_UNLOCK (unscaled->mutex);
_cairo_error_throw (_ft_to_cairo_error (error));
return NULL;
}
unscaled->face = face;
font_map->num_open_faces++;
return face;
}
/* Unlock unscaled font locked with _cairo_ft_unscaled_font_lock_face
*/
static void
_cairo_ft_unscaled_font_unlock_face (cairo_ft_unscaled_font_t *unscaled)
{
assert (unscaled->lock_count > 0);
unscaled->lock_count--;
CAIRO_MUTEX_UNLOCK (unscaled->mutex);
}
static cairo_status_t
_compute_transform (cairo_ft_font_transform_t *sf,
cairo_matrix_t *scale,
cairo_ft_unscaled_font_t *unscaled)
{
cairo_status_t status;
double x_scale, y_scale;
cairo_matrix_t normalized = *scale;
/* The font matrix has x and y "scale" components which we extract and
* use as character scale values. These influence the way freetype
* chooses hints, as well as selecting different bitmaps in
* hand-rendered fonts. We also copy the normalized matrix to
* freetype's transformation.
*/
status = _cairo_matrix_compute_basis_scale_factors (scale,
&x_scale, &y_scale,
1);
if (unlikely (status))
return status;
/* FreeType docs say this about x_scale and y_scale:
* "A character width or height smaller than 1pt is set to 1pt;"
* So, we cap them from below at 1.0 and let the FT transform
* take care of sub-1.0 scaling. */
if (x_scale < 1.0)
x_scale = 1.0;
if (y_scale < 1.0)
y_scale = 1.0;
if (unscaled && (unscaled->face->face_flags & FT_FACE_FLAG_SCALABLE) == 0) {
double min_distance = DBL_MAX;
cairo_bool_t magnify = TRUE;
int i;
double best_x_size = 0;
double best_y_size = 0;
for (i = 0; i < unscaled->face->num_fixed_sizes; i++) {
double x_size = unscaled->face->available_sizes[i].x_ppem / 64.;
double y_size = unscaled->face->available_sizes[i].y_ppem / 64.;
double distance = y_size - y_scale;
/*
* distance is positive if current strike is larger than desired
* size, and negative if smaller.
*
* We like to prefer down-scaling to upscaling.
*/
if ((magnify && distance >= 0) || fabs (distance) <= min_distance) {
magnify = distance < 0;
min_distance = fabs (distance);
best_x_size = x_size;
best_y_size = y_size;
}
}
x_scale = best_x_size;
y_scale = best_y_size;
}
sf->x_scale = x_scale;
sf->y_scale = y_scale;
cairo_matrix_scale (&normalized, 1.0 / x_scale, 1.0 / y_scale);
_cairo_matrix_get_affine (&normalized,
&sf->shape[0][0], &sf->shape[0][1],
&sf->shape[1][0], &sf->shape[1][1],
NULL, NULL);
return CAIRO_STATUS_SUCCESS;
}
/* Temporarily scales an unscaled font to the give scale. We catch
* scaling to the same size, since changing a FT_Face is expensive.
*/
static cairo_status_t
_cairo_ft_unscaled_font_set_scale (cairo_ft_unscaled_font_t *unscaled,
cairo_matrix_t *scale)
{
cairo_status_t status;
cairo_ft_font_transform_t sf;
FT_Matrix mat;
FT_Error error;
assert (unscaled->face != NULL);
if (unscaled->have_scale &&
scale->xx == unscaled->current_scale.xx &&
scale->yx == unscaled->current_scale.yx &&
scale->xy == unscaled->current_scale.xy &&
scale->yy == unscaled->current_scale.yy)
return CAIRO_STATUS_SUCCESS;
unscaled->have_scale = TRUE;
unscaled->current_scale = *scale;
status = _compute_transform (&sf, scale, unscaled);
if (unlikely (status))
return status;
unscaled->x_scale = sf.x_scale;
unscaled->y_scale = sf.y_scale;
mat.xx = DOUBLE_TO_16_16(sf.shape[0][0]);
mat.yx = - DOUBLE_TO_16_16(sf.shape[0][1]);
mat.xy = - DOUBLE_TO_16_16(sf.shape[1][0]);
mat.yy = DOUBLE_TO_16_16(sf.shape[1][1]);
unscaled->have_shape = (mat.xx != 0x10000 ||
mat.yx != 0x00000 ||
mat.xy != 0x00000 ||
mat.yy != 0x10000);
unscaled->Current_Shape = mat;
cairo_matrix_init (&unscaled->current_shape,
sf.shape[0][0], sf.shape[0][1],
sf.shape[1][0], sf.shape[1][1],
0.0, 0.0);
FT_Set_Transform(unscaled->face, &mat, NULL);
error = FT_Set_Char_Size (unscaled->face,
sf.x_scale * 64.0 + .5,
sf.y_scale * 64.0 + .5,
0, 0);
if (error)
return _cairo_error (_ft_to_cairo_error (error));
return CAIRO_STATUS_SUCCESS;
}
/* we sometimes need to convert the glyph bitmap in a FT_GlyphSlot
* into a different format. For example, we want to convert a
* FT_PIXEL_MODE_LCD or FT_PIXEL_MODE_LCD_V bitmap into a 32-bit
* ARGB or ABGR bitmap.
*
* this function prepares a target descriptor for this operation.
*
* input :: target bitmap descriptor. The function will set its
* 'width', 'rows' and 'pitch' fields, and only these
*
* slot :: the glyph slot containing the source bitmap. this
* function assumes that slot->format == FT_GLYPH_FORMAT_BITMAP
*
* mode :: the requested final rendering mode. supported values are
* MONO, NORMAL (i.e. gray), LCD and LCD_V
*
* the function returns the size in bytes of the corresponding buffer,
* it's up to the caller to allocate the corresponding memory block
* before calling _fill_xrender_bitmap
*
* it also returns -1 in case of error (e.g. incompatible arguments,
* like trying to convert a gray bitmap into a monochrome one)
*/
static int
_compute_xrender_bitmap_size(FT_Bitmap *target,
FT_GlyphSlot slot,
FT_Render_Mode mode)
{
FT_Bitmap *ftbit;
int width, height, pitch;
if (slot->format != FT_GLYPH_FORMAT_BITMAP)
return -1;
/* compute the size of the final bitmap */
ftbit = &slot->bitmap;
width = ftbit->width;
height = ftbit->rows;
pitch = (width + 3) & ~3;
switch (ftbit->pixel_mode) {
case FT_PIXEL_MODE_MONO:
if (mode == FT_RENDER_MODE_MONO) {
pitch = (((width + 31) & ~31) >> 3);
break;
}
/* fall-through */
case FT_PIXEL_MODE_GRAY:
if (mode == FT_RENDER_MODE_LCD ||
mode == FT_RENDER_MODE_LCD_V)
{
/* each pixel is replicated into a 32-bit ARGB value */
pitch = width * 4;
}
break;
case FT_PIXEL_MODE_LCD:
if (mode != FT_RENDER_MODE_LCD)
return -1;
/* horz pixel triplets are packed into 32-bit ARGB values */
width /= 3;
pitch = width * 4;
break;
case FT_PIXEL_MODE_LCD_V:
if (mode != FT_RENDER_MODE_LCD_V)
return -1;
/* vert pixel triplets are packed into 32-bit ARGB values */
height /= 3;
pitch = width * 4;
break;
default: /* unsupported source format */
return -1;
}
target->width = width;
target->rows = height;
target->pitch = pitch;
target->buffer = NULL;
return pitch * height;
}
/* this functions converts the glyph bitmap found in a FT_GlyphSlot
* into a different format (see _compute_xrender_bitmap_size)
*
* you should call this function after _compute_xrender_bitmap_size
*
* target :: target bitmap descriptor. Note that its 'buffer' pointer
* must point to memory allocated by the caller
*
* slot :: the glyph slot containing the source bitmap
*
* mode :: the requested final rendering mode
*
* bgr :: boolean, set if BGR or VBGR pixel ordering is needed
*/
static void
_fill_xrender_bitmap(FT_Bitmap *target,
FT_GlyphSlot slot,
FT_Render_Mode mode,
int bgr)
{
FT_Bitmap *ftbit = &slot->bitmap;
unsigned char *srcLine = ftbit->buffer;
unsigned char *dstLine = target->buffer;
int src_pitch = ftbit->pitch;
int width = target->width;
int height = target->rows;
int pitch = target->pitch;
int subpixel;
int h;
subpixel = (mode == FT_RENDER_MODE_LCD ||
mode == FT_RENDER_MODE_LCD_V);
if (src_pitch < 0)
srcLine -= src_pitch * (ftbit->rows - 1);
target->pixel_mode = ftbit->pixel_mode;
switch (ftbit->pixel_mode) {
case FT_PIXEL_MODE_MONO:
if (subpixel) {
/* convert mono to ARGB32 values */
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
int x;
for (x = 0; x < width; x++) {
if (srcLine[(x >> 3)] & (0x80 >> (x & 7)))
((unsigned int *) dstLine)[x] = 0xffffffffU;
}
}
target->pixel_mode = FT_PIXEL_MODE_LCD;
} else if (mode == FT_RENDER_MODE_NORMAL) {
/* convert mono to 8-bit gray */
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
int x;
for (x = 0; x < width; x++) {
if (srcLine[(x >> 3)] & (0x80 >> (x & 7)))
dstLine[x] = 0xff;
}
}
target->pixel_mode = FT_PIXEL_MODE_GRAY;
} else {
/* copy mono to mono */
int bytes = (width + 7) >> 3;
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch)
memcpy (dstLine, srcLine, bytes);
}
break;
case FT_PIXEL_MODE_GRAY:
if (subpixel) {
/* convert gray to ARGB32 values */
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
int x;
unsigned int *dst = (unsigned int *) dstLine;
for (x = 0; x < width; x++) {
unsigned int pix = srcLine[x];
pix |= (pix << 8);
pix |= (pix << 16);
dst[x] = pix;
}
}
target->pixel_mode = FT_PIXEL_MODE_LCD;
} else {
/* copy gray into gray */
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch)
memcpy (dstLine, srcLine, width);
}
break;
case FT_PIXEL_MODE_LCD:
if (!bgr) {
/* convert horizontal RGB into ARGB32 */
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
int x;
unsigned char *src = srcLine;
unsigned int *dst = (unsigned int *) dstLine;
for (x = 0; x < width; x++, src += 3) {
unsigned int pix;
pix = ((unsigned int)src[0] << 16) |
((unsigned int)src[1] << 8) |
((unsigned int)src[2] ) |
((unsigned int)src[1] << 24) ;
dst[x] = pix;
}
}
} else {
/* convert horizontal BGR into ARGB32 */
for (h = height; h > 0; h--, srcLine += src_pitch, dstLine += pitch) {
int x;
unsigned char *src = srcLine;
unsigned int *dst = (unsigned int *) dstLine;
for (x = 0; x < width; x++, src += 3) {
unsigned int pix;
pix = ((unsigned int)src[2] << 16) |
((unsigned int)src[1] << 8) |
((unsigned int)src[0] ) |
((unsigned int)src[1] << 24) ;
dst[x] = pix;
}
}
}
break;
default: /* FT_PIXEL_MODE_LCD_V */
/* convert vertical RGB into ARGB32 */
if (!bgr) {
for (h = height; h > 0; h--, srcLine += 3 * src_pitch, dstLine += pitch) {
int x;
unsigned char* src = srcLine;
unsigned int* dst = (unsigned int *) dstLine;
for (x = 0; x < width; x++, src += 1) {
unsigned int pix;
pix = ((unsigned int)src[0] << 16) |
((unsigned int)src[src_pitch] << 8) |
((unsigned int)src[src_pitch*2] ) |
((unsigned int)src[src_pitch] << 24) ;
dst[x] = pix;
}
}
} else {
for (h = height; h > 0; h--, srcLine += 3*src_pitch, dstLine += pitch) {
int x;
unsigned char *src = srcLine;
unsigned int *dst = (unsigned int *) dstLine;
for (x = 0; x < width; x++, src += 1) {
unsigned int pix;
pix = ((unsigned int)src[src_pitch * 2] << 16) |
((unsigned int)src[src_pitch] << 8) |
((unsigned int)src[0] ) |
((unsigned int)src[src_pitch] << 24) ;
dst[x] = pix;
}
}
}
}
}
/* Fills in val->image with an image surface created from @bitmap
*/
static cairo_status_t
_get_bitmap_surface (FT_Bitmap *bitmap,
FT_Library library,
cairo_bool_t own_buffer,
cairo_font_options_t *font_options,
cairo_image_surface_t **surface)
{
unsigned int width, height;
unsigned char *data;
int format = CAIRO_FORMAT_A8;
int stride;
cairo_image_surface_t *image;
cairo_bool_t component_alpha = FALSE;
width = bitmap->width;
height = bitmap->rows;
if (width == 0 || height == 0) {
*surface = (cairo_image_surface_t *)
cairo_image_surface_create_for_data (NULL, format, 0, 0, 0);
return (*surface)->base.status;
}
switch (bitmap->pixel_mode) {
case FT_PIXEL_MODE_MONO:
stride = (((width + 31) & ~31) >> 3);
if (own_buffer) {
data = bitmap->buffer;
assert (stride == bitmap->pitch);
} else {
data = _cairo_malloc_ab (height, stride);
if (!data)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (stride == bitmap->pitch) {
memcpy (data, bitmap->buffer, stride * height);
} else {
int i;
unsigned char *source, *dest;
source = bitmap->buffer;
dest = data;
for (i = height; i; i--) {
memcpy (dest, source, bitmap->pitch);
memset (dest + bitmap->pitch, '\0', stride - bitmap->pitch);
source += bitmap->pitch;
dest += stride;
}
}
}
#ifndef WORDS_BIGENDIAN
{
uint8_t *d = data;
int count = stride * height;
while (count--) {
*d = CAIRO_BITSWAP8 (*d);
d++;
}
}
#endif
format = CAIRO_FORMAT_A1;
break;
case FT_PIXEL_MODE_LCD:
case FT_PIXEL_MODE_LCD_V:
case FT_PIXEL_MODE_GRAY:
if (font_options->antialias != CAIRO_ANTIALIAS_SUBPIXEL ||
bitmap->pixel_mode == FT_PIXEL_MODE_GRAY)
{
stride = bitmap->pitch;
/* We don't support stride not multiple of 4. */
if (stride & 3)
{
assert (!own_buffer);
goto convert;
}
if (own_buffer) {
data = bitmap->buffer;
} else {
data = _cairo_malloc_ab (height, stride);
if (!data)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
memcpy (data, bitmap->buffer, stride * height);
}
format = CAIRO_FORMAT_A8;
} else {
data = bitmap->buffer;
stride = bitmap->pitch;
format = CAIRO_FORMAT_ARGB32;
component_alpha = TRUE;
}
break;
#ifdef FT_LOAD_COLOR
case FT_PIXEL_MODE_BGRA:
stride = width * 4;
if (own_buffer) {
data = bitmap->buffer;
} else {
data = _cairo_malloc_ab (height, stride);
if (!data)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
memcpy (data, bitmap->buffer, stride * height);
}
format = CAIRO_FORMAT_ARGB32;
break;
#endif
case FT_PIXEL_MODE_GRAY2:
case FT_PIXEL_MODE_GRAY4:
convert:
if (!own_buffer && library)
{
/* This is pretty much the only case that we can get in here. */
/* Convert to 8bit grayscale. */
FT_Bitmap tmp;
FT_Int align;
FT_Error error;
format = CAIRO_FORMAT_A8;
align = cairo_format_stride_for_width (format, bitmap->width);
FT_Bitmap_New( &tmp );
error = FT_Bitmap_Convert( library, bitmap, &tmp, align );
if (error)
return _cairo_error (_ft_to_cairo_error (error));
FT_Bitmap_Done( library, bitmap );
*bitmap = tmp;
stride = bitmap->pitch;
data = _cairo_malloc_ab (height, stride);
if (!data)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (bitmap->num_grays != 256)
{
unsigned int x, y;
unsigned int mul = 255 / (bitmap->num_grays - 1);
FT_Byte *p = bitmap->buffer;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
p[x] *= mul;
p += bitmap->pitch;
}
}
memcpy (data, bitmap->buffer, stride * height);
break;
}
/* These could be triggered by very rare types of TrueType fonts */
default:
if (own_buffer)
free (bitmap->buffer);
return _cairo_error (CAIRO_STATUS_INVALID_FORMAT);
}
/* XXX */
*surface = image = (cairo_image_surface_t *)
cairo_image_surface_create_for_data (data,
format,
width, height, stride);
if (image->base.status) {
free (data);
return (*surface)->base.status;
}
if (component_alpha)
pixman_image_set_component_alpha (image->pixman_image, TRUE);
_cairo_image_surface_assume_ownership_of_data (image);
_cairo_debug_check_image_surface_is_defined (&image->base);
return CAIRO_STATUS_SUCCESS;
}
/* Converts an outline FT_GlyphSlot into an image
*
* This could go through _render_glyph_bitmap as well, letting
* FreeType convert the outline to a bitmap, but doing it ourselves
* has two minor advantages: first, we save a copy of the bitmap
* buffer: we can directly use the buffer that FreeType renders
* into.
*
* Second, it may help when we add support for subpixel
* rendering: the Xft code does it this way. (Keith thinks that
* it may also be possible to get the subpixel rendering with
* FT_Render_Glyph: something worth looking into in more detail
* when we add subpixel support. If so, we may want to eliminate
* this version of the code path entirely.
*/
static cairo_status_t
_render_glyph_outline (FT_Face face,
cairo_font_options_t *font_options,
cairo_image_surface_t **surface)
{
int rgba = FC_RGBA_UNKNOWN;
int lcd_filter = FT_LCD_FILTER_LEGACY;
FT_GlyphSlot glyphslot = face->glyph;
FT_Outline *outline = &glyphslot->outline;
FT_Bitmap bitmap;
FT_BBox cbox;
unsigned int width, height;
cairo_status_t status;
FT_Error error;
FT_Library library = glyphslot->library;
FT_Render_Mode render_mode = FT_RENDER_MODE_NORMAL;
switch (font_options->antialias) {
case CAIRO_ANTIALIAS_NONE:
render_mode = FT_RENDER_MODE_MONO;
break;
case CAIRO_ANTIALIAS_SUBPIXEL:
case CAIRO_ANTIALIAS_BEST:
switch (font_options->subpixel_order) {
case CAIRO_SUBPIXEL_ORDER_DEFAULT:
case CAIRO_SUBPIXEL_ORDER_RGB:
case CAIRO_SUBPIXEL_ORDER_BGR:
render_mode = FT_RENDER_MODE_LCD;
break;
case CAIRO_SUBPIXEL_ORDER_VRGB:
case CAIRO_SUBPIXEL_ORDER_VBGR:
render_mode = FT_RENDER_MODE_LCD_V;
break;
}
switch (font_options->lcd_filter) {
case CAIRO_LCD_FILTER_NONE:
lcd_filter = FT_LCD_FILTER_NONE;
break;
case CAIRO_LCD_FILTER_DEFAULT:
case CAIRO_LCD_FILTER_INTRA_PIXEL:
lcd_filter = FT_LCD_FILTER_LEGACY;
break;
case CAIRO_LCD_FILTER_FIR3:
lcd_filter = FT_LCD_FILTER_LIGHT;
break;
case CAIRO_LCD_FILTER_FIR5:
lcd_filter = FT_LCD_FILTER_DEFAULT;
break;
}
break;
case CAIRO_ANTIALIAS_DEFAULT:
case CAIRO_ANTIALIAS_GRAY:
case CAIRO_ANTIALIAS_GOOD:
case CAIRO_ANTIALIAS_FAST:
render_mode = FT_RENDER_MODE_NORMAL;
}
FT_Outline_Get_CBox (outline, &cbox);
cbox.xMin &= -64;
cbox.yMin &= -64;
cbox.xMax = (cbox.xMax + 63) & -64;
cbox.yMax = (cbox.yMax + 63) & -64;
width = (unsigned int) ((cbox.xMax - cbox.xMin) >> 6);
height = (unsigned int) ((cbox.yMax - cbox.yMin) >> 6);
if (width * height == 0) {
cairo_format_t format;
/* Looks like fb handles zero-sized images just fine */
switch (render_mode) {
case FT_RENDER_MODE_MONO:
format = CAIRO_FORMAT_A1;
break;
case FT_RENDER_MODE_LCD:
case FT_RENDER_MODE_LCD_V:
format= CAIRO_FORMAT_ARGB32;
break;
case FT_RENDER_MODE_LIGHT:
case FT_RENDER_MODE_NORMAL:
case FT_RENDER_MODE_MAX:
default:
format = CAIRO_FORMAT_A8;
break;
}
(*surface) = (cairo_image_surface_t *)
cairo_image_surface_create_for_data (NULL, format, 0, 0, 0);
if ((*surface)->base.status)
return (*surface)->base.status;
} else {
int bitmap_size;
switch (render_mode) {
case FT_RENDER_MODE_LCD:
if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_BGR)
rgba = FC_RGBA_BGR;
else
rgba = FC_RGBA_RGB;
break;
case FT_RENDER_MODE_LCD_V:
if (font_options->subpixel_order == CAIRO_SUBPIXEL_ORDER_VBGR)
rgba = FC_RGBA_VBGR;
else
rgba = FC_RGBA_VRGB;
break;
case FT_RENDER_MODE_MONO:
case FT_RENDER_MODE_LIGHT:
case FT_RENDER_MODE_NORMAL:
case FT_RENDER_MODE_MAX:
default:
break;
}
#if HAVE_FT_LIBRARY_SETLCDFILTER
FT_Library_SetLcdFilter (library, lcd_filter);
#endif
error = FT_Render_Glyph (face->glyph, render_mode);
#if HAVE_FT_LIBRARY_SETLCDFILTER
FT_Library_SetLcdFilter (library, FT_LCD_FILTER_NONE);
#endif
if (error)
return _cairo_error (_ft_to_cairo_error (error));
bitmap_size = _compute_xrender_bitmap_size (&bitmap,
face->glyph,
render_mode);
if (bitmap_size < 0)
return _cairo_error (CAIRO_STATUS_INVALID_FORMAT);
bitmap.buffer = calloc (1, bitmap_size);
if (bitmap.buffer == NULL)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
_fill_xrender_bitmap (&bitmap, face->glyph, render_mode,
(rgba == FC_RGBA_BGR || rgba == FC_RGBA_VBGR));
/* Note:
* _get_bitmap_surface will free bitmap.buffer if there is an error
*/
status = _get_bitmap_surface (&bitmap, NULL, TRUE, font_options, surface);
if (unlikely (status))
return status;
/* Note: the font's coordinate system is upside down from ours, so the
* Y coordinate of the control box needs to be negated. Moreover, device
* offsets are position of glyph origin relative to top left while xMin
* and yMax are offsets of top left relative to origin. Another negation.
*/
cairo_surface_set_device_offset (&(*surface)->base,
(double)-glyphslot->bitmap_left,
(double)+glyphslot->bitmap_top);
}
return CAIRO_STATUS_SUCCESS;
}
/* Converts a bitmap (or other) FT_GlyphSlot into an image */
static cairo_status_t
_render_glyph_bitmap (FT_Face face,
cairo_font_options_t *font_options,
cairo_image_surface_t **surface)
{
FT_GlyphSlot glyphslot = face->glyph;
cairo_status_t status;
FT_Error error;
/* According to the FreeType docs, glyphslot->format could be
* something other than FT_GLYPH_FORMAT_OUTLINE or
* FT_GLYPH_FORMAT_BITMAP. Calling FT_Render_Glyph gives FreeType
* the opportunity to convert such to
* bitmap. FT_GLYPH_FORMAT_COMPOSITE will not be encountered since
* we avoid the FT_LOAD_NO_RECURSE flag.
*/
error = FT_Render_Glyph (glyphslot, FT_RENDER_MODE_NORMAL);
/* XXX ignoring all other errors for now. They are not fatal, typically
* just a glyph-not-found. */
if (error == FT_Err_Out_Of_Memory)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = _get_bitmap_surface (&glyphslot->bitmap,
glyphslot->library,
FALSE, font_options,
surface);
if (unlikely (status))
return status;
/*
* Note: the font's coordinate system is upside down from ours, so the
* Y coordinate of the control box needs to be negated. Moreover, device
* offsets are position of glyph origin relative to top left while
* bitmap_left and bitmap_top are offsets of top left relative to origin.
* Another negation.
*/
cairo_surface_set_device_offset (&(*surface)->base,
-glyphslot->bitmap_left,
+glyphslot->bitmap_top);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_transform_glyph_bitmap (cairo_matrix_t * shape,
cairo_image_surface_t ** surface)
{
cairo_matrix_t original_to_transformed;
cairo_matrix_t transformed_to_original;
cairo_image_surface_t *old_image;
cairo_surface_t *image;
double x[4], y[4];
double origin_x, origin_y;
int orig_width, orig_height;
int i;
int x_min, y_min, x_max, y_max;
int width, height;
cairo_status_t status;
cairo_surface_pattern_t pattern;
/* We want to compute a transform that takes the origin
* (device_x_offset, device_y_offset) to 0,0, then applies
* the "shape" portion of the font transform
*/
original_to_transformed = *shape;
cairo_surface_get_device_offset (&(*surface)->base, &origin_x, &origin_y);
orig_width = (*surface)->width;
orig_height = (*surface)->height;
cairo_matrix_translate (&original_to_transformed,
-origin_x, -origin_y);
/* Find the bounding box of the original bitmap under that
* transform
*/
x[0] = 0; y[0] = 0;
x[1] = orig_width; y[1] = 0;
x[2] = orig_width; y[2] = orig_height;
x[3] = 0; y[3] = orig_height;
for (i = 0; i < 4; i++)
cairo_matrix_transform_point (&original_to_transformed,
&x[i], &y[i]);
x_min = floor (x[0]); y_min = floor (y[0]);
x_max = ceil (x[0]); y_max = ceil (y[0]);
for (i = 1; i < 4; i++) {
if (x[i] < x_min)
x_min = floor (x[i]);
else if (x[i] > x_max)
x_max = ceil (x[i]);
if (y[i] < y_min)
y_min = floor (y[i]);
else if (y[i] > y_max)
y_max = ceil (y[i]);
}
/* Adjust the transform so that the bounding box starts at 0,0 ...
* this gives our final transform from original bitmap to transformed
* bitmap.
*/
original_to_transformed.x0 -= x_min;
original_to_transformed.y0 -= y_min;
/* Create the transformed bitmap */
width = x_max - x_min;
height = y_max - y_min;
transformed_to_original = original_to_transformed;
status = cairo_matrix_invert (&transformed_to_original);
if (unlikely (status))
return status;
if ((*surface)->format == CAIRO_FORMAT_ARGB32 &&
!pixman_image_get_component_alpha ((*surface)->pixman_image))
image = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
else
image = cairo_image_surface_create (CAIRO_FORMAT_A8, width, height);
if (unlikely (image->status))
return image->status;
/* Draw the original bitmap transformed into the new bitmap
*/
_cairo_pattern_init_for_surface (&pattern, &(*surface)->base);
cairo_pattern_set_matrix (&pattern.base, &transformed_to_original);
status = _cairo_surface_paint (image,
CAIRO_OPERATOR_SOURCE,
&pattern.base,
NULL);
_cairo_pattern_fini (&pattern.base);
if (unlikely (status)) {
cairo_surface_destroy (image);
return status;
}
/* Now update the cache entry for the new bitmap, recomputing
* the origin based on the final transform.
*/
cairo_matrix_transform_point (&original_to_transformed,
&origin_x, &origin_y);
old_image = (*surface);
(*surface) = (cairo_image_surface_t *)image;
cairo_surface_destroy (&old_image->base);
cairo_surface_set_device_offset (&(*surface)->base,
_cairo_lround (origin_x),
_cairo_lround (origin_y));
return CAIRO_STATUS_SUCCESS;
}
static const cairo_unscaled_font_backend_t cairo_ft_unscaled_font_backend = {
_cairo_ft_unscaled_font_destroy,
#if 0
_cairo_ft_unscaled_font_create_glyph
#endif
};
/* #cairo_ft_scaled_font_t */
typedef struct _cairo_ft_scaled_font {
cairo_scaled_font_t base;
cairo_ft_unscaled_font_t *unscaled;
cairo_ft_options_t ft_options;
} cairo_ft_scaled_font_t;
static const cairo_scaled_font_backend_t _cairo_ft_scaled_font_backend;
#if CAIRO_HAS_FC_FONT
/* The load flags passed to FT_Load_Glyph control aspects like hinting and
* antialiasing. Here we compute them from the fields of a FcPattern.
*/
static void
_get_pattern_ft_options (FcPattern *pattern, cairo_ft_options_t *ret)
{
FcBool antialias, vertical_layout, hinting, autohint, bitmap, embolden;
cairo_ft_options_t ft_options;
int rgba;
#ifdef FC_HINT_STYLE
int hintstyle;
#endif
_cairo_font_options_init_default (&ft_options.base);
ft_options.load_flags = FT_LOAD_DEFAULT;
ft_options.synth_flags = 0;
#ifndef FC_EMBEDDED_BITMAP
#define FC_EMBEDDED_BITMAP "embeddedbitmap"
#endif
/* Check whether to force use of embedded bitmaps */
if (FcPatternGetBool (pattern,
FC_EMBEDDED_BITMAP, 0, &bitmap) != FcResultMatch)
bitmap = FcFalse;
/* disable antialiasing if requested */
if (FcPatternGetBool (pattern,
FC_ANTIALIAS, 0, &antialias) != FcResultMatch)
antialias = FcTrue;
if (antialias) {
cairo_subpixel_order_t subpixel_order;
int lcd_filter;
/* disable hinting if requested */
if (FcPatternGetBool (pattern,
FC_HINTING, 0, &hinting) != FcResultMatch)
hinting = FcTrue;
if (FcPatternGetInteger (pattern,
FC_RGBA, 0, &rgba) != FcResultMatch)
rgba = FC_RGBA_UNKNOWN;
switch (rgba) {
case FC_RGBA_RGB:
subpixel_order = CAIRO_SUBPIXEL_ORDER_RGB;
break;
case FC_RGBA_BGR:
subpixel_order = CAIRO_SUBPIXEL_ORDER_BGR;
break;
case FC_RGBA_VRGB:
subpixel_order = CAIRO_SUBPIXEL_ORDER_VRGB;
break;
case FC_RGBA_VBGR:
subpixel_order = CAIRO_SUBPIXEL_ORDER_VBGR;
break;
case FC_RGBA_UNKNOWN:
case FC_RGBA_NONE:
default:
subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT;
break;
}
if (subpixel_order != CAIRO_SUBPIXEL_ORDER_DEFAULT) {
ft_options.base.subpixel_order = subpixel_order;
ft_options.base.antialias = CAIRO_ANTIALIAS_SUBPIXEL;
}
if (FcPatternGetInteger (pattern,
FC_LCD_FILTER, 0, &lcd_filter) == FcResultMatch)
{
switch (lcd_filter) {
case FC_LCD_NONE:
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_NONE;
break;
case FC_LCD_DEFAULT:
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR5;
break;
case FC_LCD_LIGHT:
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_FIR3;
break;
case FC_LCD_LEGACY:
ft_options.base.lcd_filter = CAIRO_LCD_FILTER_INTRA_PIXEL;
break;
}
}
#ifdef FC_HINT_STYLE
if (FcPatternGetInteger (pattern,
FC_HINT_STYLE, 0, &hintstyle) != FcResultMatch)
hintstyle = FC_HINT_FULL;
if (!hinting)
hintstyle = FC_HINT_NONE;
switch (hintstyle) {
case FC_HINT_NONE:
ft_options.base.hint_style = CAIRO_HINT_STYLE_NONE;
break;
case FC_HINT_SLIGHT:
ft_options.base.hint_style = CAIRO_HINT_STYLE_SLIGHT;
break;
case FC_HINT_MEDIUM:
default:
ft_options.base.hint_style = CAIRO_HINT_STYLE_MEDIUM;
break;
case FC_HINT_FULL:
ft_options.base.hint_style = CAIRO_HINT_STYLE_FULL;
break;
}
#else /* !FC_HINT_STYLE */
if (!hinting) {
ft_options.base.hint_style = CAIRO_HINT_STYLE_NONE;
}
#endif /* FC_HINT_STYLE */
/* Force embedded bitmaps off if no hinting requested */
if (ft_options.base.hint_style == CAIRO_HINT_STYLE_NONE)
bitmap = FcFalse;
if (!bitmap)
ft_options.load_flags |= FT_LOAD_NO_BITMAP;
} else {
ft_options.base.antialias = CAIRO_ANTIALIAS_NONE;
}
/* force autohinting if requested */
if (FcPatternGetBool (pattern,
FC_AUTOHINT, 0, &autohint) != FcResultMatch)
autohint = FcFalse;
if (autohint)
ft_options.load_flags |= FT_LOAD_FORCE_AUTOHINT;
if (FcPatternGetBool (pattern,
FC_VERTICAL_LAYOUT, 0, &vertical_layout) != FcResultMatch)
vertical_layout = FcFalse;
if (vertical_layout)
ft_options.load_flags |= FT_LOAD_VERTICAL_LAYOUT;
#ifndef FC_EMBOLDEN
#define FC_EMBOLDEN "embolden"
#endif
if (FcPatternGetBool (pattern,
FC_EMBOLDEN, 0, &embolden) != FcResultMatch)
embolden = FcFalse;
if (embolden)
ft_options.synth_flags |= CAIRO_FT_SYNTHESIZE_BOLD;
*ret = ft_options;
}
#endif
static void
_cairo_ft_options_merge (cairo_ft_options_t *options,
cairo_ft_options_t *other)
{
int load_flags = other->load_flags;
int load_target = FT_LOAD_TARGET_NORMAL;
/* clear load target mode */
load_flags &= ~(FT_LOAD_TARGET_(FT_LOAD_TARGET_MODE(other->load_flags)));
if (load_flags & FT_LOAD_NO_HINTING)
other->base.hint_style = CAIRO_HINT_STYLE_NONE;
if (other->base.antialias == CAIRO_ANTIALIAS_NONE ||
options->base.antialias == CAIRO_ANTIALIAS_NONE) {
options->base.antialias = CAIRO_ANTIALIAS_NONE;
options->base.subpixel_order = CAIRO_SUBPIXEL_ORDER_DEFAULT;
}
if (other->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL &&
(options->base.antialias == CAIRO_ANTIALIAS_DEFAULT ||
options->base.antialias == CAIRO_ANTIALIAS_GRAY)) {
options->base.antialias = CAIRO_ANTIALIAS_SUBPIXEL;
options->base.subpixel_order = other->base.subpixel_order;
}
if (options->base.hint_style == CAIRO_HINT_STYLE_DEFAULT)
options->base.hint_style = other->base.hint_style;
if (other->base.hint_style == CAIRO_HINT_STYLE_NONE)
options->base.hint_style = CAIRO_HINT_STYLE_NONE;
if (options->base.lcd_filter == CAIRO_LCD_FILTER_DEFAULT)
options->base.lcd_filter = other->base.lcd_filter;
if (other->base.lcd_filter == CAIRO_LCD_FILTER_NONE)
options->base.lcd_filter = CAIRO_LCD_FILTER_NONE;
if (options->base.antialias == CAIRO_ANTIALIAS_NONE) {
if (options->base.hint_style == CAIRO_HINT_STYLE_NONE)
load_flags |= FT_LOAD_NO_HINTING;
else
load_target = FT_LOAD_TARGET_MONO;
load_flags |= FT_LOAD_MONOCHROME;
} else {
switch (options->base.hint_style) {
case CAIRO_HINT_STYLE_NONE:
load_flags |= FT_LOAD_NO_HINTING;
break;
case CAIRO_HINT_STYLE_SLIGHT:
load_target = FT_LOAD_TARGET_LIGHT;
break;
case CAIRO_HINT_STYLE_MEDIUM:
break;
case CAIRO_HINT_STYLE_FULL:
case CAIRO_HINT_STYLE_DEFAULT:
if (options->base.antialias == CAIRO_ANTIALIAS_SUBPIXEL) {
switch (options->base.subpixel_order) {
case CAIRO_SUBPIXEL_ORDER_DEFAULT:
case CAIRO_SUBPIXEL_ORDER_RGB:
case CAIRO_SUBPIXEL_ORDER_BGR:
load_target = FT_LOAD_TARGET_LCD;
break;
case CAIRO_SUBPIXEL_ORDER_VRGB:
case CAIRO_SUBPIXEL_ORDER_VBGR:
load_target = FT_LOAD_TARGET_LCD_V;
break;
}
}
break;
}
}
options->load_flags = load_flags | load_target;
options->synth_flags = other->synth_flags;
}
static cairo_status_t
_cairo_ft_font_face_scaled_font_create (void *abstract_font_face,
const cairo_matrix_t *font_matrix,
const cairo_matrix_t *ctm,
const cairo_font_options_t *options,
cairo_scaled_font_t **font_out)
{
cairo_ft_font_face_t *font_face = abstract_font_face;
cairo_ft_scaled_font_t *scaled_font;
FT_Face face;
FT_Size_Metrics *metrics;
cairo_font_extents_t fs_metrics;
cairo_status_t status;
cairo_ft_unscaled_font_t *unscaled;
assert (font_face->unscaled);
face = _cairo_ft_unscaled_font_lock_face (font_face->unscaled);
if (unlikely (face == NULL)) /* backend error */
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
scaled_font = malloc (sizeof (cairo_ft_scaled_font_t));
if (unlikely (scaled_font == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL;
}
scaled_font->unscaled = unscaled = font_face->unscaled;
_cairo_unscaled_font_reference (&unscaled->base);
_cairo_font_options_init_copy (&scaled_font->ft_options.base, options);
_cairo_ft_options_merge (&scaled_font->ft_options, &font_face->ft_options);
status = _cairo_scaled_font_init (&scaled_font->base,
&font_face->base,
font_matrix, ctm, options,
&_cairo_ft_scaled_font_backend);
if (unlikely (status))
goto CLEANUP_SCALED_FONT;
status = _cairo_ft_unscaled_font_set_scale (unscaled,
&scaled_font->base.scale);
if (unlikely (status)) {
/* This can only fail if we encounter an error with the underlying
* font, so propagate the error back to the font-face. */
_cairo_ft_unscaled_font_unlock_face (unscaled);
_cairo_unscaled_font_destroy (&unscaled->base);
free (scaled_font);
return status;
}
metrics = &face->size->metrics;
/*
* Get to unscaled metrics so that the upper level can get back to
* user space
*
* Also use this path for bitmap-only fonts. The other branch uses
* face members that are only relevant for scalable fonts. This is
* detected by simply checking for units_per_EM==0.
*/
if (scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF ||
face->units_per_EM == 0) {
double x_factor, y_factor;
if (unscaled->x_scale == 0)
x_factor = 0;
else
x_factor = 1 / unscaled->x_scale;
if (unscaled->y_scale == 0)
y_factor = 0;
else
y_factor = 1 / unscaled->y_scale;
fs_metrics.ascent = DOUBLE_FROM_26_6(metrics->ascender) * y_factor;
fs_metrics.descent = DOUBLE_FROM_26_6(- metrics->descender) * y_factor;
fs_metrics.height = DOUBLE_FROM_26_6(metrics->height) * y_factor;
if (!_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) {
fs_metrics.max_x_advance = DOUBLE_FROM_26_6(metrics->max_advance) * x_factor;
fs_metrics.max_y_advance = 0;
} else {
fs_metrics.max_x_advance = 0;
fs_metrics.max_y_advance = DOUBLE_FROM_26_6(metrics->max_advance) * y_factor;
}
} else {
double scale = face->units_per_EM;
fs_metrics.ascent = face->ascender / scale;
fs_metrics.descent = - face->descender / scale;
fs_metrics.height = face->height / scale;
if (!_cairo_ft_scaled_font_is_vertical (&scaled_font->base)) {
fs_metrics.max_x_advance = face->max_advance_width / scale;
fs_metrics.max_y_advance = 0;
} else {
fs_metrics.max_x_advance = 0;
fs_metrics.max_y_advance = face->max_advance_height / scale;
}
}
status = _cairo_scaled_font_set_metrics (&scaled_font->base, &fs_metrics);
if (unlikely (status))
goto CLEANUP_SCALED_FONT;
_cairo_ft_unscaled_font_unlock_face (unscaled);
*font_out = &scaled_font->base;
return CAIRO_STATUS_SUCCESS;
CLEANUP_SCALED_FONT:
_cairo_unscaled_font_destroy (&unscaled->base);
free (scaled_font);
FAIL:
_cairo_ft_unscaled_font_unlock_face (font_face->unscaled);
*font_out = _cairo_scaled_font_create_in_error (status);
return CAIRO_STATUS_SUCCESS; /* non-backend error */
}
cairo_bool_t
_cairo_scaled_font_is_ft (cairo_scaled_font_t *scaled_font)
{
return scaled_font->backend == &_cairo_ft_scaled_font_backend;
}
static void
_cairo_ft_scaled_font_fini (void *abstract_font)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
if (scaled_font == NULL)
return;
_cairo_unscaled_font_destroy (&scaled_font->unscaled->base);
}
static int
_move_to (FT_Vector *to, void *closure)
{
cairo_path_fixed_t *path = closure;
cairo_fixed_t x, y;
x = _cairo_fixed_from_26_6 (to->x);
y = _cairo_fixed_from_26_6 (to->y);
if (_cairo_path_fixed_close_path (path) != CAIRO_STATUS_SUCCESS)
return 1;
if (_cairo_path_fixed_move_to (path, x, y) != CAIRO_STATUS_SUCCESS)
return 1;
return 0;
}
static int
_line_to (FT_Vector *to, void *closure)
{
cairo_path_fixed_t *path = closure;
cairo_fixed_t x, y;
x = _cairo_fixed_from_26_6 (to->x);
y = _cairo_fixed_from_26_6 (to->y);
if (_cairo_path_fixed_line_to (path, x, y) != CAIRO_STATUS_SUCCESS)
return 1;
return 0;
}
static int
_conic_to (FT_Vector *control, FT_Vector *to, void *closure)
{
cairo_path_fixed_t *path = closure;
cairo_fixed_t x0, y0;
cairo_fixed_t x1, y1;
cairo_fixed_t x2, y2;
cairo_fixed_t x3, y3;
cairo_point_t conic;
if (! _cairo_path_fixed_get_current_point (path, &x0, &y0))
return 1;
conic.x = _cairo_fixed_from_26_6 (control->x);
conic.y = _cairo_fixed_from_26_6 (control->y);
x3 = _cairo_fixed_from_26_6 (to->x);
y3 = _cairo_fixed_from_26_6 (to->y);
x1 = x0 + 2.0/3.0 * (conic.x - x0);
y1 = y0 + 2.0/3.0 * (conic.y - y0);
x2 = x3 + 2.0/3.0 * (conic.x - x3);
y2 = y3 + 2.0/3.0 * (conic.y - y3);
if (_cairo_path_fixed_curve_to (path,
x1, y1,
x2, y2,
x3, y3) != CAIRO_STATUS_SUCCESS)
return 1;
return 0;
}
static int
_cubic_to (FT_Vector *control1, FT_Vector *control2,
FT_Vector *to, void *closure)
{
cairo_path_fixed_t *path = closure;
cairo_fixed_t x0, y0;
cairo_fixed_t x1, y1;
cairo_fixed_t x2, y2;
x0 = _cairo_fixed_from_26_6 (control1->x);
y0 = _cairo_fixed_from_26_6 (control1->y);
x1 = _cairo_fixed_from_26_6 (control2->x);
y1 = _cairo_fixed_from_26_6 (control2->y);
x2 = _cairo_fixed_from_26_6 (to->x);
y2 = _cairo_fixed_from_26_6 (to->y);
if (_cairo_path_fixed_curve_to (path,
x0, y0,
x1, y1,
x2, y2) != CAIRO_STATUS_SUCCESS)
return 1;
return 0;
}
static cairo_status_t
_decompose_glyph_outline (FT_Face face,
cairo_font_options_t *options,
cairo_path_fixed_t **pathp)
{
static const FT_Outline_Funcs outline_funcs = {
(FT_Outline_MoveToFunc)_move_to,
(FT_Outline_LineToFunc)_line_to,
(FT_Outline_ConicToFunc)_conic_to,
(FT_Outline_CubicToFunc)_cubic_to,
0, /* shift */
0, /* delta */
};
static const FT_Matrix invert_y = {
DOUBLE_TO_16_16 (1.0), 0,
0, DOUBLE_TO_16_16 (-1.0),
};
FT_GlyphSlot glyph;
cairo_path_fixed_t *path;
cairo_status_t status;
path = _cairo_path_fixed_create ();
if (!path)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
glyph = face->glyph;
/* Font glyphs have an inverted Y axis compared to cairo. */
FT_Outline_Transform (&glyph->outline, &invert_y);
if (FT_Outline_Decompose (&glyph->outline, &outline_funcs, path)) {
_cairo_path_fixed_destroy (path);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
status = _cairo_path_fixed_close_path (path);
if (unlikely (status)) {
_cairo_path_fixed_destroy (path);
return status;
}
*pathp = path;
return CAIRO_STATUS_SUCCESS;
}
/*
* Translate glyph to match its metrics.
*/
static void
_cairo_ft_scaled_glyph_vertical_layout_bearing_fix (void *abstract_font,
FT_GlyphSlot glyph)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
FT_Vector vector;
vector.x = glyph->metrics.vertBearingX - glyph->metrics.horiBearingX;
vector.y = -glyph->metrics.vertBearingY - glyph->metrics.horiBearingY;
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE) {
FT_Vector_Transform (&vector, &scaled_font->unscaled->Current_Shape);
FT_Outline_Translate(&glyph->outline, vector.x, vector.y);
} else if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
glyph->bitmap_left += vector.x / 64;
glyph->bitmap_top += vector.y / 64;
}
}
static cairo_int_status_t
_cairo_ft_scaled_glyph_load_glyph (cairo_ft_scaled_font_t *scaled_font,
cairo_scaled_glyph_t *scaled_glyph,
FT_Face face,
int load_flags,
cairo_bool_t use_em_size,
cairo_bool_t vertical_layout)
{
FT_Error error;
cairo_status_t status;
if (use_em_size) {
cairo_matrix_t em_size;
cairo_matrix_init_scale (&em_size, face->units_per_EM, face->units_per_EM);
status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled, &em_size);
} else {
status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled,
&scaled_font->base.scale);
}
if (unlikely (status))
return status;
error = FT_Load_Glyph (face,
_cairo_scaled_glyph_index(scaled_glyph),
load_flags);
/* XXX ignoring all other errors for now. They are not fatal, typically
* just a glyph-not-found. */
if (error == FT_Err_Out_Of_Memory)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
/*
* synthesize glyphs if requested
*/
#if HAVE_FT_GLYPHSLOT_EMBOLDEN
if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_BOLD)
FT_GlyphSlot_Embolden (face->glyph);
#endif
#if HAVE_FT_GLYPHSLOT_OBLIQUE
if (scaled_font->ft_options.synth_flags & CAIRO_FT_SYNTHESIZE_OBLIQUE)
FT_GlyphSlot_Oblique (face->glyph);
#endif
if (vertical_layout)
_cairo_ft_scaled_glyph_vertical_layout_bearing_fix (scaled_font, face->glyph);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_ft_scaled_glyph_init (void *abstract_font,
cairo_scaled_glyph_t *scaled_glyph,
cairo_scaled_glyph_info_t info)
{
cairo_text_extents_t fs_metrics;
cairo_ft_scaled_font_t *scaled_font = abstract_font;
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
FT_GlyphSlot glyph;
FT_Face face;
int load_flags = scaled_font->ft_options.load_flags;
FT_Glyph_Metrics *metrics;
double x_factor, y_factor;
cairo_bool_t vertical_layout = FALSE;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
cairo_bool_t scaled_glyph_loaded = FALSE;
face = _cairo_ft_unscaled_font_lock_face (unscaled);
if (!face)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
/* Ignore global advance unconditionally */
load_flags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH;
if ((info & CAIRO_SCALED_GLYPH_INFO_PATH) != 0 &&
(info & CAIRO_SCALED_GLYPH_INFO_SURFACE) == 0)
load_flags |= FT_LOAD_NO_BITMAP;
/*
* Don't pass FT_LOAD_VERTICAL_LAYOUT to FT_Load_Glyph here as
* suggested by freetype people.
*/
if (load_flags & FT_LOAD_VERTICAL_LAYOUT) {
load_flags &= ~FT_LOAD_VERTICAL_LAYOUT;
vertical_layout = TRUE;
}
#ifdef FT_LOAD_COLOR
/* Color-glyph support:
*
* This flags needs plumbing through fontconfig (does it?), and
* maybe we should cache color and grayscale bitmaps separately
* such that users of the font (ie. the surface) can choose which
* version to use based on target content type.
*
* Moreover, none of our backends and compositors currently support
* color glyphs. As such, this is currently disabled.
*/
/* load_flags |= FT_LOAD_COLOR; */
#endif
if (info & CAIRO_SCALED_GLYPH_INFO_METRICS) {
cairo_bool_t hint_metrics = scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF;
status = _cairo_ft_scaled_glyph_load_glyph (scaled_font,
scaled_glyph,
face,
load_flags,
!hint_metrics,
vertical_layout);
if (unlikely (status))
goto FAIL;
glyph = face->glyph;
scaled_glyph_loaded = hint_metrics;
/*
* Compute font-space metrics
*/
metrics = &glyph->metrics;
if (unscaled->x_scale == 0)
x_factor = 0;
else
x_factor = 1 / unscaled->x_scale;
if (unscaled->y_scale == 0)
y_factor = 0;
else
y_factor = 1 / unscaled->y_scale;
/*
* Note: Y coordinates of the horizontal bearing need to be negated.
*
* Scale metrics back to glyph space from the scaled glyph space returned
* by FreeType
*
* If we want hinted metrics but aren't asking for hinted glyphs from
* FreeType, then we need to do the metric hinting ourselves.
*/
if (hint_metrics && (load_flags & FT_LOAD_NO_HINTING))
{
FT_Pos x1, x2;
FT_Pos y1, y2;
FT_Pos advance;
if (!vertical_layout) {
x1 = (metrics->horiBearingX) & -64;
x2 = (metrics->horiBearingX + metrics->width + 63) & -64;
y1 = (-metrics->horiBearingY) & -64;
y2 = (-metrics->horiBearingY + metrics->height + 63) & -64;
advance = ((metrics->horiAdvance + 32) & -64);
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (x1) * x_factor;
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (y1) * y_factor;
fs_metrics.width = DOUBLE_FROM_26_6 (x2 - x1) * x_factor;
fs_metrics.height = DOUBLE_FROM_26_6 (y2 - y1) * y_factor;
fs_metrics.x_advance = DOUBLE_FROM_26_6 (advance) * x_factor;
fs_metrics.y_advance = 0;
} else {
x1 = (metrics->vertBearingX) & -64;
x2 = (metrics->vertBearingX + metrics->width + 63) & -64;
y1 = (metrics->vertBearingY) & -64;
y2 = (metrics->vertBearingY + metrics->height + 63) & -64;
advance = ((metrics->vertAdvance + 32) & -64);
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (x1) * x_factor;
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (y1) * y_factor;
fs_metrics.width = DOUBLE_FROM_26_6 (x2 - x1) * x_factor;
fs_metrics.height = DOUBLE_FROM_26_6 (y2 - y1) * y_factor;
fs_metrics.x_advance = 0;
fs_metrics.y_advance = DOUBLE_FROM_26_6 (advance) * y_factor;
}
} else {
fs_metrics.width = DOUBLE_FROM_26_6 (metrics->width) * x_factor;
fs_metrics.height = DOUBLE_FROM_26_6 (metrics->height) * y_factor;
if (!vertical_layout) {
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (metrics->horiBearingX) * x_factor;
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (-metrics->horiBearingY) * y_factor;
if (hint_metrics || glyph->format != FT_GLYPH_FORMAT_OUTLINE)
fs_metrics.x_advance = DOUBLE_FROM_26_6 (metrics->horiAdvance) * x_factor;
else
fs_metrics.x_advance = DOUBLE_FROM_16_16 (glyph->linearHoriAdvance) * x_factor;
fs_metrics.y_advance = 0 * y_factor;
} else {
fs_metrics.x_bearing = DOUBLE_FROM_26_6 (metrics->vertBearingX) * x_factor;
fs_metrics.y_bearing = DOUBLE_FROM_26_6 (metrics->vertBearingY) * y_factor;
fs_metrics.x_advance = 0 * x_factor;
if (hint_metrics || glyph->format != FT_GLYPH_FORMAT_OUTLINE)
fs_metrics.y_advance = DOUBLE_FROM_26_6 (metrics->vertAdvance) * y_factor;
else
fs_metrics.y_advance = DOUBLE_FROM_16_16 (glyph->linearVertAdvance) * y_factor;
}
}
_cairo_scaled_glyph_set_metrics (scaled_glyph,
&scaled_font->base,
&fs_metrics);
}
if ((info & CAIRO_SCALED_GLYPH_INFO_SURFACE) != 0) {
cairo_image_surface_t *surface;
if (!scaled_glyph_loaded) {
status = _cairo_ft_scaled_glyph_load_glyph (scaled_font,
scaled_glyph,
face,
load_flags,
FALSE,
vertical_layout);
if (unlikely (status))
goto FAIL;
glyph = face->glyph;
scaled_glyph_loaded = TRUE;
}
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE) {
status = _render_glyph_outline (face, &scaled_font->ft_options.base,
&surface);
} else {
status = _render_glyph_bitmap (face, &scaled_font->ft_options.base,
&surface);
if (likely (status == CAIRO_STATUS_SUCCESS) &&
unscaled->have_shape)
{
status = _transform_glyph_bitmap (&unscaled->current_shape,
&surface);
if (unlikely (status))
cairo_surface_destroy (&surface->base);
}
}
if (unlikely (status))
goto FAIL;
_cairo_scaled_glyph_set_surface (scaled_glyph,
&scaled_font->base,
surface);
}
if (info & CAIRO_SCALED_GLYPH_INFO_PATH) {
cairo_path_fixed_t *path = NULL; /* hide compiler warning */
/*
* A kludge -- the above code will trash the outline,
* so reload it. This will probably never occur though
*/
if ((info & CAIRO_SCALED_GLYPH_INFO_SURFACE) != 0) {
scaled_glyph_loaded = FALSE;
load_flags |= FT_LOAD_NO_BITMAP;
}
if (!scaled_glyph_loaded) {
status = _cairo_ft_scaled_glyph_load_glyph (scaled_font,
scaled_glyph,
face,
load_flags,
FALSE,
vertical_layout);
if (unlikely (status))
goto FAIL;
glyph = face->glyph;
}
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE)
status = _decompose_glyph_outline (face, &scaled_font->ft_options.base,
&path);
else
status = CAIRO_INT_STATUS_UNSUPPORTED;
if (unlikely (status))
goto FAIL;
_cairo_scaled_glyph_set_path (scaled_glyph,
&scaled_font->base,
path);
}
FAIL:
_cairo_ft_unscaled_font_unlock_face (unscaled);
return status;
}
static unsigned long
_cairo_ft_ucs4_to_index (void *abstract_font,
uint32_t ucs4)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
FT_Face face;
FT_UInt index;
face = _cairo_ft_unscaled_font_lock_face (unscaled);
if (!face)
return 0;
#if CAIRO_HAS_FC_FONT
index = FcFreeTypeCharIndex (face, ucs4);
#else
index = FT_Get_Char_Index (face, ucs4);
#endif
_cairo_ft_unscaled_font_unlock_face (unscaled);
return index;
}
static cairo_int_status_t
_cairo_ft_load_truetype_table (void *abstract_font,
unsigned long tag,
long offset,
unsigned char *buffer,
unsigned long *length)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
FT_Face face;
cairo_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
/* We don't support the FreeType feature of loading a table
* without specifying the size since this may overflow our
* buffer. */
assert (length != NULL);
if (_cairo_ft_scaled_font_is_vertical (&scaled_font->base))
return CAIRO_INT_STATUS_UNSUPPORTED;
#if HAVE_FT_LOAD_SFNT_TABLE
face = _cairo_ft_unscaled_font_lock_face (unscaled);
if (!face)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (FT_IS_SFNT (face)) {
if (buffer == NULL)
*length = 0;
if (FT_Load_Sfnt_Table (face, tag, offset, buffer, length) == 0)
status = CAIRO_STATUS_SUCCESS;
}
_cairo_ft_unscaled_font_unlock_face (unscaled);
#endif
return status;
}
static cairo_int_status_t
_cairo_ft_index_to_ucs4(void *abstract_font,
unsigned long index,
uint32_t *ucs4)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
FT_Face face;
FT_ULong charcode;
FT_UInt gindex;
face = _cairo_ft_unscaled_font_lock_face (unscaled);
if (!face)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
*ucs4 = (uint32_t) -1;
charcode = FT_Get_First_Char(face, &gindex);
while (gindex != 0) {
if (gindex == index) {
*ucs4 = charcode;
break;
}
charcode = FT_Get_Next_Char (face, charcode, &gindex);
}
_cairo_ft_unscaled_font_unlock_face (unscaled);
return CAIRO_STATUS_SUCCESS;
}
static cairo_bool_t
_cairo_ft_is_synthetic (void *abstract_font)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
return scaled_font->ft_options.synth_flags != 0;
}
static cairo_int_status_t
_cairo_index_to_glyph_name (void *abstract_font,
char **glyph_names,
int num_glyph_names,
unsigned long glyph_index,
unsigned long *glyph_array_index)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
FT_Face face;
char buffer[256]; /* PLRM spcifies max name length of 127 */
FT_Error error;
int i;
face = _cairo_ft_unscaled_font_lock_face (unscaled);
if (!face)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
error = FT_Get_Glyph_Name (face, glyph_index, buffer, sizeof buffer);
_cairo_ft_unscaled_font_unlock_face (unscaled);
if (error != FT_Err_Ok) {
/* propagate fatal errors from FreeType */
if (error == FT_Err_Out_Of_Memory)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
return CAIRO_INT_STATUS_UNSUPPORTED;
}
/* FT first numbers the glyphs in the order they are read from the
* Type 1 font. Then if .notdef is not the first glyph, the first
* glyph is swapped with .notdef to ensure that .notdef is at
* glyph index 0.
*
* As all but two glyphs in glyph_names already have the same
* index as the FT glyph index, we first check if
* glyph_names[glyph_index] is the name we are looking for. If not
* we fall back to searching the entire array.
*/
if ((long)glyph_index < num_glyph_names &&
strcmp (glyph_names[glyph_index], buffer) == 0)
{
*glyph_array_index = glyph_index;
return CAIRO_STATUS_SUCCESS;
}
for (i = 0; i < num_glyph_names; i++) {
if (strcmp (glyph_names[i], buffer) == 0) {
*glyph_array_index = i;
return CAIRO_STATUS_SUCCESS;
}
}
return CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_bool_t
_ft_is_type1 (FT_Face face)
{
#if HAVE_FT_GET_X11_FONT_FORMAT
const char *font_format = FT_Get_X11_Font_Format (face);
if (font_format &&
(strcmp (font_format, "Type 1") == 0 ||
strcmp (font_format, "CFF") == 0))
{
return TRUE;
}
#endif
return FALSE;
}
static cairo_int_status_t
_cairo_ft_load_type1_data (void *abstract_font,
long offset,
unsigned char *buffer,
unsigned long *length)
{
cairo_ft_scaled_font_t *scaled_font = abstract_font;
cairo_ft_unscaled_font_t *unscaled = scaled_font->unscaled;
FT_Face face;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
unsigned long available_length;
unsigned long ret;
assert (length != NULL);
if (_cairo_ft_scaled_font_is_vertical (&scaled_font->base))
return CAIRO_INT_STATUS_UNSUPPORTED;
face = _cairo_ft_unscaled_font_lock_face (unscaled);
if (!face)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
#if HAVE_FT_LOAD_SFNT_TABLE
if (FT_IS_SFNT (face)) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
goto unlock;
}
#endif
if (! _ft_is_type1 (face)) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
goto unlock;
}
available_length = MAX (face->stream->size - offset, 0);
if (!buffer) {
*length = available_length;
} else {
if (*length > available_length) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
} else if (face->stream->read != NULL) {
/* Note that read() may be implemented as a macro, thanks POSIX!, so we
* need to wrap the following usage in parentheses in order to
* disambiguate it for the pre-processor - using the verbose function
* pointer dereference for clarity.
*/
ret = (* face->stream->read) (face->stream,
offset,
buffer,
*length);
if (ret != *length)
status = _cairo_error (CAIRO_STATUS_READ_ERROR);
} else {
memcpy (buffer, face->stream->base + offset, *length);
}
}
unlock:
_cairo_ft_unscaled_font_unlock_face (unscaled);
return status;
}
static const cairo_scaled_font_backend_t _cairo_ft_scaled_font_backend = {
CAIRO_FONT_TYPE_FT,
_cairo_ft_scaled_font_fini,
_cairo_ft_scaled_glyph_init,
NULL, /* text_to_glyphs */
_cairo_ft_ucs4_to_index,
_cairo_ft_load_truetype_table,
_cairo_ft_index_to_ucs4,
_cairo_ft_is_synthetic,
_cairo_index_to_glyph_name,
_cairo_ft_load_type1_data
};
/* #cairo_ft_font_face_t */
#if CAIRO_HAS_FC_FONT
static cairo_font_face_t *
_cairo_ft_font_face_create_for_pattern (FcPattern *pattern);
static cairo_status_t
_cairo_ft_font_face_create_for_toy (cairo_toy_font_face_t *toy_face,
cairo_font_face_t **font_face_out)
{
cairo_font_face_t *font_face = (cairo_font_face_t *) &_cairo_font_face_nil;
FcPattern *pattern;
int fcslant;
int fcweight;
pattern = FcPatternCreate ();
if (!pattern) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return font_face->status;
}
if (!FcPatternAddString (pattern,
FC_FAMILY, (unsigned char *) toy_face->family))
{
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
goto FREE_PATTERN;
}
switch (toy_face->slant)
{
case CAIRO_FONT_SLANT_ITALIC:
fcslant = FC_SLANT_ITALIC;
break;
case CAIRO_FONT_SLANT_OBLIQUE:
fcslant = FC_SLANT_OBLIQUE;
break;
case CAIRO_FONT_SLANT_NORMAL:
default:
fcslant = FC_SLANT_ROMAN;
break;
}
if (!FcPatternAddInteger (pattern, FC_SLANT, fcslant)) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
goto FREE_PATTERN;
}
switch (toy_face->weight)
{
case CAIRO_FONT_WEIGHT_BOLD:
fcweight = FC_WEIGHT_BOLD;
break;
case CAIRO_FONT_WEIGHT_NORMAL:
default:
fcweight = FC_WEIGHT_MEDIUM;
break;
}
if (!FcPatternAddInteger (pattern, FC_WEIGHT, fcweight)) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
goto FREE_PATTERN;
}
font_face = _cairo_ft_font_face_create_for_pattern (pattern);
FREE_PATTERN:
FcPatternDestroy (pattern);
*font_face_out = font_face;
return font_face->status;
}
#endif
static cairo_bool_t
_cairo_ft_font_face_destroy (void *abstract_face)
{
cairo_ft_font_face_t *font_face = abstract_face;
/* When destroying a face created by cairo_ft_font_face_create_for_ft_face,
* we have a special "zombie" state for the face when the unscaled font
* is still alive but there are no other references to a font face with
* the same FT_Face.
*
* We go from:
*
* font_face ------> unscaled
* <-....weak....../
*
* To:
*
* font_face <------- unscaled
*/
if (font_face->unscaled &&
font_face->unscaled->from_face &&
font_face->next == NULL &&
font_face->unscaled->faces == font_face &&
CAIRO_REFERENCE_COUNT_GET_VALUE (&font_face->unscaled->base.ref_count) > 1)
{
_cairo_unscaled_font_destroy (&font_face->unscaled->base);
font_face->unscaled = NULL;
return FALSE;
}
if (font_face->unscaled) {
cairo_ft_font_face_t *tmp_face = NULL;
cairo_ft_font_face_t *last_face = NULL;
/* Remove face from linked list */
for (tmp_face = font_face->unscaled->faces;
tmp_face;
tmp_face = tmp_face->next)
{
if (tmp_face == font_face) {
if (last_face)
last_face->next = tmp_face->next;
else
font_face->unscaled->faces = tmp_face->next;
}
last_face = tmp_face;
}
_cairo_unscaled_font_destroy (&font_face->unscaled->base);
font_face->unscaled = NULL;
}
#if CAIRO_HAS_FC_FONT
if (font_face->pattern) {
FcPatternDestroy (font_face->pattern);
cairo_font_face_destroy (font_face->resolved_font_face);
}
#endif
return TRUE;
}
static cairo_font_face_t *
_cairo_ft_font_face_get_implementation (void *abstract_face,
const cairo_matrix_t *font_matrix,
const cairo_matrix_t *ctm,
const cairo_font_options_t *options)
{
cairo_ft_font_face_t *font_face = abstract_face;
/* The handling of font options is different depending on how the
* font face was created. When the user creates a font face with
* cairo_ft_font_face_create_for_ft_face(), then the load flags
* passed in augment the load flags for the options. But for
* cairo_ft_font_face_create_for_pattern(), the load flags are
* derived from a pattern where the user has called
* cairo_ft_font_options_substitute(), so *just* use those load
* flags and ignore the options.
*/
#if CAIRO_HAS_FC_FONT
/* If we have an unresolved pattern, resolve it and create
* unscaled font. Otherwise, use the ones stored in font_face.
*/
if (font_face->pattern) {
cairo_font_face_t *resolved;
/* Cache the resolved font whilst the FcConfig remains consistent. */
resolved = font_face->resolved_font_face;
if (resolved != NULL) {
if (! FcInitBringUptoDate ()) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_font_face_t *) &_cairo_font_face_nil;
}
if (font_face->resolved_config == FcConfigGetCurrent ())
return cairo_font_face_reference (resolved);
cairo_font_face_destroy (resolved);
font_face->resolved_font_face = NULL;
}
resolved = _cairo_ft_resolve_pattern (font_face->pattern,
font_matrix,
ctm,
options);
if (unlikely (resolved->status))
return resolved;
font_face->resolved_font_face = cairo_font_face_reference (resolved);
font_face->resolved_config = FcConfigGetCurrent ();
return resolved;
}
#endif
return abstract_face;
}
const cairo_font_face_backend_t _cairo_ft_font_face_backend = {
CAIRO_FONT_TYPE_FT,
#if CAIRO_HAS_FC_FONT
_cairo_ft_font_face_create_for_toy,
#else
NULL,
#endif
_cairo_ft_font_face_destroy,
_cairo_ft_font_face_scaled_font_create,
_cairo_ft_font_face_get_implementation
};
#if CAIRO_HAS_FC_FONT
static cairo_font_face_t *
_cairo_ft_font_face_create_for_pattern (FcPattern *pattern)
{
cairo_ft_font_face_t *font_face;
font_face = malloc (sizeof (cairo_ft_font_face_t));
if (unlikely (font_face == NULL)) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_font_face_t *) &_cairo_font_face_nil;
}
font_face->unscaled = NULL;
font_face->next = NULL;
font_face->pattern = FcPatternDuplicate (pattern);
if (unlikely (font_face->pattern == NULL)) {
free (font_face);
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_font_face_t *) &_cairo_font_face_nil;
}
font_face->resolved_font_face = NULL;
font_face->resolved_config = NULL;
_cairo_font_face_init (&font_face->base, &_cairo_ft_font_face_backend);
return &font_face->base;
}
#endif
static cairo_font_face_t *
_cairo_ft_font_face_create (cairo_ft_unscaled_font_t *unscaled,
cairo_ft_options_t *ft_options)
{
cairo_ft_font_face_t *font_face, **prev_font_face;
/* Looked for an existing matching font face */
for (font_face = unscaled->faces, prev_font_face = &unscaled->faces;
font_face;
prev_font_face = &font_face->next, font_face = font_face->next)
{
if (font_face->ft_options.load_flags == ft_options->load_flags &&
font_face->ft_options.synth_flags == ft_options->synth_flags &&
cairo_font_options_equal (&font_face->ft_options.base, &ft_options->base))
{
if (font_face->base.status) {
/* The font_face has been left in an error state, abandon it. */
*prev_font_face = font_face->next;
break;
}
if (font_face->unscaled == NULL) {
/* Resurrect this "zombie" font_face (from
* _cairo_ft_font_face_destroy), switching its unscaled_font
* from owner to ownee. */
font_face->unscaled = unscaled;
_cairo_unscaled_font_reference (&unscaled->base);
return &font_face->base;
} else
return cairo_font_face_reference (&font_face->base);
}
}
/* No match found, create a new one */
font_face = malloc (sizeof (cairo_ft_font_face_t));
if (unlikely (!font_face)) {
_cairo_error_throw (CAIRO_STATUS_NO_MEMORY);
return (cairo_font_face_t *)&_cairo_font_face_nil;
}
font_face->unscaled = unscaled;
_cairo_unscaled_font_reference (&unscaled->base);
font_face->ft_options = *ft_options;
if (unscaled->faces && unscaled->faces->unscaled == NULL) {
/* This "zombie" font_face (from _cairo_ft_font_face_destroy)
* is no longer needed. */
assert (unscaled->from_face && unscaled->faces->next == NULL);
cairo_font_face_destroy (&unscaled->faces->base);
unscaled->faces = NULL;
}
font_face->next = unscaled->faces;
unscaled->faces = font_face;
#if CAIRO_HAS_FC_FONT
font_face->pattern = NULL;
#endif
_cairo_font_face_init (&font_face->base, &_cairo_ft_font_face_backend);
return &font_face->base;
}
/* implement the platform-specific interface */
#if CAIRO_HAS_FC_FONT
static cairo_status_t
_cairo_ft_font_options_substitute (const cairo_font_options_t *options,
FcPattern *pattern)
{
FcValue v;
if (options->antialias != CAIRO_ANTIALIAS_DEFAULT)
{
if (FcPatternGet (pattern, FC_ANTIALIAS, 0, &v) == FcResultNoMatch)
{
if (! FcPatternAddBool (pattern,
FC_ANTIALIAS,
options->antialias != CAIRO_ANTIALIAS_NONE))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
if (options->antialias != CAIRO_ANTIALIAS_SUBPIXEL) {
FcPatternDel (pattern, FC_RGBA);
if (! FcPatternAddInteger (pattern, FC_RGBA, FC_RGBA_NONE))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
}
if (options->antialias != CAIRO_ANTIALIAS_DEFAULT)
{
if (FcPatternGet (pattern, FC_RGBA, 0, &v) == FcResultNoMatch)
{
int rgba;
if (options->antialias == CAIRO_ANTIALIAS_SUBPIXEL) {
switch (options->subpixel_order) {
case CAIRO_SUBPIXEL_ORDER_DEFAULT:
case CAIRO_SUBPIXEL_ORDER_RGB:
default:
rgba = FC_RGBA_RGB;
break;
case CAIRO_SUBPIXEL_ORDER_BGR:
rgba = FC_RGBA_BGR;
break;
case CAIRO_SUBPIXEL_ORDER_VRGB:
rgba = FC_RGBA_VRGB;
break;
case CAIRO_SUBPIXEL_ORDER_VBGR:
rgba = FC_RGBA_VBGR;
break;
}
} else {
rgba = FC_RGBA_NONE;
}
if (! FcPatternAddInteger (pattern, FC_RGBA, rgba))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
if (options->lcd_filter != CAIRO_LCD_FILTER_DEFAULT)
{
if (FcPatternGet (pattern, FC_LCD_FILTER, 0, &v) == FcResultNoMatch)
{
int lcd_filter;
switch (options->lcd_filter) {
case CAIRO_LCD_FILTER_NONE:
lcd_filter = FT_LCD_FILTER_NONE;
break;
case CAIRO_LCD_FILTER_DEFAULT:
case CAIRO_LCD_FILTER_INTRA_PIXEL:
lcd_filter = FT_LCD_FILTER_LEGACY;
break;
case CAIRO_LCD_FILTER_FIR3:
lcd_filter = FT_LCD_FILTER_LIGHT;
break;
default:
case CAIRO_LCD_FILTER_FIR5:
lcd_filter = FT_LCD_FILTER_DEFAULT;
break;
}
if (! FcPatternAddInteger (pattern, FC_LCD_FILTER, lcd_filter))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
}
if (options->hint_style != CAIRO_HINT_STYLE_DEFAULT)
{
if (FcPatternGet (pattern, FC_HINTING, 0, &v) == FcResultNoMatch)
{
if (! FcPatternAddBool (pattern,
FC_HINTING,
options->hint_style != CAIRO_HINT_STYLE_NONE))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
#ifdef FC_HINT_STYLE
if (FcPatternGet (pattern, FC_HINT_STYLE, 0, &v) == FcResultNoMatch)
{
int hint_style;
switch (options->hint_style) {
case CAIRO_HINT_STYLE_NONE:
hint_style = FC_HINT_NONE;
break;
case CAIRO_HINT_STYLE_SLIGHT:
hint_style = FC_HINT_SLIGHT;
break;
case CAIRO_HINT_STYLE_MEDIUM:
hint_style = FC_HINT_MEDIUM;
break;
case CAIRO_HINT_STYLE_FULL:
case CAIRO_HINT_STYLE_DEFAULT:
default:
hint_style = FC_HINT_FULL;
break;
}
if (! FcPatternAddInteger (pattern, FC_HINT_STYLE, hint_style))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
#endif
}
return CAIRO_STATUS_SUCCESS;
}
/**
* cairo_ft_font_options_substitute:
* @options: a #cairo_font_options_t object
* @pattern: an existing #FcPattern
*
* Add options to a #FcPattern based on a #cairo_font_options_t font
* options object. Options that are already in the pattern, are not overridden,
* so you should call this function after calling FcConfigSubstitute() (the
* user's settings should override options based on the surface type), but
* before calling FcDefaultSubstitute().
*
* Since: 1.0
**/
void
cairo_ft_font_options_substitute (const cairo_font_options_t *options,
FcPattern *pattern)
{
if (cairo_font_options_status ((cairo_font_options_t *) options))
return;
_cairo_ft_font_options_substitute (options, pattern);
}
static cairo_font_face_t *
_cairo_ft_resolve_pattern (FcPattern *pattern,
const cairo_matrix_t *font_matrix,
const cairo_matrix_t *ctm,
const cairo_font_options_t *font_options)
{
cairo_status_t status;
cairo_matrix_t scale;
FcPattern *resolved;
cairo_ft_font_transform_t sf;
FcResult result;
cairo_ft_unscaled_font_t *unscaled;
cairo_ft_options_t ft_options;
cairo_font_face_t *font_face;
scale = *ctm;
scale.x0 = scale.y0 = 0;
cairo_matrix_multiply (&scale,
font_matrix,
&scale);
status = _compute_transform (&sf, &scale, NULL);
if (unlikely (status))
return (cairo_font_face_t *)&_cairo_font_face_nil;
pattern = FcPatternDuplicate (pattern);
if (pattern == NULL)
return (cairo_font_face_t *)&_cairo_font_face_nil;
if (! FcPatternAddDouble (pattern, FC_PIXEL_SIZE, sf.y_scale)) {
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
goto FREE_PATTERN;
}
if (! FcConfigSubstitute (NULL, pattern, FcMatchPattern)) {
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
goto FREE_PATTERN;
}
status = _cairo_ft_font_options_substitute (font_options, pattern);
if (status) {
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
goto FREE_PATTERN;
}
FcDefaultSubstitute (pattern);
status = _cairo_ft_unscaled_font_create_for_pattern (pattern, &unscaled);
if (unlikely (status)) {
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
goto FREE_PATTERN;
}
if (unscaled == NULL) {
resolved = FcFontMatch (NULL, pattern, &result);
if (!resolved) {
/* We failed to find any font. Substitute twin so that the user can
* see something (and hopefully recognise that the font is missing)
* and not just receive a NO_MEMORY error during rendering.
*/
font_face = _cairo_font_face_twin_create_fallback ();
goto FREE_PATTERN;
}
status = _cairo_ft_unscaled_font_create_for_pattern (resolved, &unscaled);
if (unlikely (status || unscaled == NULL)) {
font_face = (cairo_font_face_t *)&_cairo_font_face_nil;
goto FREE_RESOLVED;
}
} else
resolved = pattern;
_get_pattern_ft_options (resolved, &ft_options);
font_face = _cairo_ft_font_face_create (unscaled, &ft_options);
_cairo_unscaled_font_destroy (&unscaled->base);
FREE_RESOLVED:
if (resolved != pattern)
FcPatternDestroy (resolved);
FREE_PATTERN:
FcPatternDestroy (pattern);
return font_face;
}
/**
* cairo_ft_font_face_create_for_pattern:
* @pattern: A fontconfig pattern. Cairo makes a copy of the pattern
* if it needs to. You are free to modify or free @pattern after this call.
*
* Creates a new font face for the FreeType font backend based on a
* fontconfig pattern. This font can then be used with
* cairo_set_font_face() or cairo_scaled_font_create(). The
* #cairo_scaled_font_t returned from cairo_scaled_font_create() is
* also for the FreeType backend and can be used with functions such
* as cairo_ft_scaled_font_lock_face().
*
* Font rendering options are represented both here and when you
* call cairo_scaled_font_create(). Font options that have a representation
* in a #FcPattern must be passed in here; to modify #FcPattern
* appropriately to reflect the options in a #cairo_font_options_t, call
* cairo_ft_font_options_substitute().
*
* The pattern's FC_FT_FACE element is inspected first and if that is set,
* that will be the FreeType font face associated with the returned cairo
* font face. Otherwise the FC_FILE element is checked. If it's set,
* that and the value of the FC_INDEX element (defaults to zero) of @pattern
* are used to load a font face from file.
*
* If both steps from the previous paragraph fails, @pattern will be passed
* to FcConfigSubstitute, FcDefaultSubstitute, and finally FcFontMatch,
* and the resulting font pattern is used.
*
* If the FC_FT_FACE element of @pattern is set, the user is responsible
* for making sure that the referenced FT_Face remains valid for the life
* time of the returned #cairo_font_face_t. See
* cairo_ft_font_face_create_for_ft_face() for an example of how to couple
* the life time of the FT_Face to that of the cairo font-face.
*
* Return value: a newly created #cairo_font_face_t. Free with
* cairo_font_face_destroy() when you are done using it.
*
* Since: 1.0
**/
cairo_font_face_t *
cairo_ft_font_face_create_for_pattern (FcPattern *pattern)
{
cairo_ft_unscaled_font_t *unscaled;
cairo_font_face_t *font_face;
cairo_ft_options_t ft_options;
cairo_status_t status;
status = _cairo_ft_unscaled_font_create_for_pattern (pattern, &unscaled);
if (unlikely (status)) {
if (status == CAIRO_STATUS_FILE_NOT_FOUND)
return (cairo_font_face_t *) &_cairo_font_face_nil_file_not_found;
else
return (cairo_font_face_t *) &_cairo_font_face_nil;
}
if (unlikely (unscaled == NULL)) {
/* Store the pattern. We will resolve it and create unscaled
* font when creating scaled fonts */
return _cairo_ft_font_face_create_for_pattern (pattern);
}
_get_pattern_ft_options (pattern, &ft_options);
font_face = _cairo_ft_font_face_create (unscaled, &ft_options);
_cairo_unscaled_font_destroy (&unscaled->base);
return font_face;
}
#endif
/**
* cairo_ft_font_face_create_for_ft_face:
* @face: A FreeType face object, already opened. This must
* be kept around until the face's ref_count drops to
* zero and it is freed. Since the face may be referenced
* internally to Cairo, the best way to determine when it
* is safe to free the face is to pass a
* #cairo_destroy_func_t to cairo_font_face_set_user_data()
* @load_flags: flags to pass to FT_Load_Glyph when loading
* glyphs from the font. These flags are OR'ed together with
* the flags derived from the #cairo_font_options_t passed
* to cairo_scaled_font_create(), so only a few values such
* as %FT_LOAD_VERTICAL_LAYOUT, and %FT_LOAD_FORCE_AUTOHINT
* are useful. You should not pass any of the flags affecting
* the load target, such as %FT_LOAD_TARGET_LIGHT.
*
* Creates a new font face for the FreeType font backend from a
* pre-opened FreeType face. This font can then be used with
* cairo_set_font_face() or cairo_scaled_font_create(). The
* #cairo_scaled_font_t returned from cairo_scaled_font_create() is
* also for the FreeType backend and can be used with functions such
* as cairo_ft_scaled_font_lock_face(). Note that Cairo may keep a reference
* to the FT_Face alive in a font-cache and the exact lifetime of the reference
* depends highly upon the exact usage pattern and is subject to external
* factors. You must not call FT_Done_Face() before the last reference to the
* #cairo_font_face_t has been dropped.
*
* As an example, below is how one might correctly couple the lifetime of
* the FreeType face object to the #cairo_font_face_t.
*
* <informalexample><programlisting>
* static const cairo_user_data_key_t key;
*
* font_face = cairo_ft_font_face_create_for_ft_face (ft_face, 0);
* status = cairo_font_face_set_user_data (font_face, &key,
* ft_face, (cairo_destroy_func_t) FT_Done_Face);
* if (status) {
* cairo_font_face_destroy (font_face);
* FT_Done_Face (ft_face);
* return ERROR;
* }
* </programlisting></informalexample>
*
* Return value: a newly created #cairo_font_face_t. Free with
* cairo_font_face_destroy() when you are done using it.
*
* Since: 1.0
**/
cairo_font_face_t *
cairo_ft_font_face_create_for_ft_face (FT_Face face,
int load_flags)
{
cairo_ft_unscaled_font_t *unscaled;
cairo_font_face_t *font_face;
cairo_ft_options_t ft_options;
cairo_status_t status;
status = _cairo_ft_unscaled_font_create_from_face (face, &unscaled);
if (unlikely (status))
return (cairo_font_face_t *)&_cairo_font_face_nil;
ft_options.load_flags = load_flags;
ft_options.synth_flags = 0;
_cairo_font_options_init_default (&ft_options.base);
font_face = _cairo_ft_font_face_create (unscaled, &ft_options);
_cairo_unscaled_font_destroy (&unscaled->base);
return font_face;
}
/**
* cairo_ft_font_face_set_synthesize:
* @font_face: The #cairo_ft_font_face_t object to modify
* @synth_flags: the set of synthesis options to enable
*
* FreeType provides the ability to synthesize different glyphs from a base
* font, which is useful if you lack those glyphs from a true bold or oblique
* font. See also #cairo_ft_synthesize_t.
*
* Since: 1.12
**/
void
cairo_ft_font_face_set_synthesize (cairo_font_face_t *font_face,
unsigned int synth_flags)
{
cairo_ft_font_face_t *ft;
if (font_face->backend->type != CAIRO_FONT_TYPE_FT)
return;
ft = (cairo_ft_font_face_t *) font_face;
ft->ft_options.synth_flags |= synth_flags;
}
/**
* cairo_ft_font_face_unset_synthesize:
* @font_face: The #cairo_ft_font_face_t object to modify
* @synth_flags: the set of synthesis options to disable
*
* See cairo_ft_font_face_set_synthesize().
*
* Since: 1.12
**/
void
cairo_ft_font_face_unset_synthesize (cairo_font_face_t *font_face,
unsigned int synth_flags)
{
cairo_ft_font_face_t *ft;
if (font_face->backend->type != CAIRO_FONT_TYPE_FT)
return;
ft = (cairo_ft_font_face_t *) font_face;
ft->ft_options.synth_flags &= ~synth_flags;
}
/**
* cairo_ft_font_face_get_synthesize:
* @font_face: The #cairo_ft_font_face_t object to query
*
* See #cairo_ft_synthesize_t.
*
* Returns: the current set of synthesis options.
*
* Since: 1.12
**/
unsigned int
cairo_ft_font_face_get_synthesize (cairo_font_face_t *font_face)
{
cairo_ft_font_face_t *ft;
if (font_face->backend->type != CAIRO_FONT_TYPE_FT)
return 0;
ft = (cairo_ft_font_face_t *) font_face;
return ft->ft_options.synth_flags;
}
/**
* cairo_ft_scaled_font_lock_face:
* @scaled_font: A #cairo_scaled_font_t from the FreeType font backend. Such an
* object can be created by calling cairo_scaled_font_create() on a
* FreeType backend font face (see cairo_ft_font_face_create_for_pattern(),
* cairo_ft_font_face_create_for_ft_face()).
*
* cairo_ft_scaled_font_lock_face() gets the #FT_Face object from a FreeType
* backend font and scales it appropriately for the font. You must
* release the face with cairo_ft_scaled_font_unlock_face()
* when you are done using it. Since the #FT_Face object can be
* shared between multiple #cairo_scaled_font_t objects, you must not
* lock any other font objects until you unlock this one. A count is
* kept of the number of times cairo_ft_scaled_font_lock_face() is
* called. cairo_ft_scaled_font_unlock_face() must be called the same number
* of times.
*
* You must be careful when using this function in a library or in a
* threaded application, because freetype's design makes it unsafe to
* call freetype functions simultaneously from multiple threads, (even
* if using distinct FT_Face objects). Because of this, application
* code that acquires an FT_Face object with this call must add its
* own locking to protect any use of that object, (and which also must
* protect any other calls into cairo as almost any cairo function
* might result in a call into the freetype library).
*
* Return value: The #FT_Face object for @font, scaled appropriately,
* or %NULL if @scaled_font is in an error state (see
* cairo_scaled_font_status()) or there is insufficient memory.
*
* Since: 1.0
**/
FT_Face
cairo_ft_scaled_font_lock_face (cairo_scaled_font_t *abstract_font)
{
cairo_ft_scaled_font_t *scaled_font = (cairo_ft_scaled_font_t *) abstract_font;
FT_Face face;
cairo_status_t status;
if (! _cairo_scaled_font_is_ft (abstract_font)) {
_cairo_error_throw (CAIRO_STATUS_FONT_TYPE_MISMATCH);
return NULL;
}
if (scaled_font->base.status)
return NULL;
face = _cairo_ft_unscaled_font_lock_face (scaled_font->unscaled);
if (unlikely (face == NULL)) {
status = _cairo_scaled_font_set_error (&scaled_font->base, CAIRO_STATUS_NO_MEMORY);
return NULL;
}
status = _cairo_ft_unscaled_font_set_scale (scaled_font->unscaled,
&scaled_font->base.scale);
if (unlikely (status)) {
_cairo_ft_unscaled_font_unlock_face (scaled_font->unscaled);
status = _cairo_scaled_font_set_error (&scaled_font->base, status);
return NULL;
}
/* Note: We deliberately release the unscaled font's mutex here,
* so that we are not holding a lock across two separate calls to
* cairo function, (which would give the application some
* opportunity for creating deadlock. This is obviously unsafe,
* but as documented, the user must add manual locking when using
* this function. */
CAIRO_MUTEX_UNLOCK (scaled_font->unscaled->mutex);
return face;
}
/**
* cairo_ft_scaled_font_unlock_face:
* @scaled_font: A #cairo_scaled_font_t from the FreeType font backend. Such an
* object can be created by calling cairo_scaled_font_create() on a
* FreeType backend font face (see cairo_ft_font_face_create_for_pattern(),
* cairo_ft_font_face_create_for_ft_face()).
*
* Releases a face obtained with cairo_ft_scaled_font_lock_face().
*
* Since: 1.0
**/
void
cairo_ft_scaled_font_unlock_face (cairo_scaled_font_t *abstract_font)
{
cairo_ft_scaled_font_t *scaled_font = (cairo_ft_scaled_font_t *) abstract_font;
if (! _cairo_scaled_font_is_ft (abstract_font)) {
_cairo_error_throw (CAIRO_STATUS_FONT_TYPE_MISMATCH);
return;
}
if (scaled_font->base.status)
return;
/* Note: We released the unscaled font's mutex at the end of
* cairo_ft_scaled_font_lock_face, so we have to acquire it again
* as _cairo_ft_unscaled_font_unlock_face expects it to be held
* when we call into it. */
CAIRO_MUTEX_LOCK (scaled_font->unscaled->mutex);
_cairo_ft_unscaled_font_unlock_face (scaled_font->unscaled);
}
static cairo_bool_t
_cairo_ft_scaled_font_is_vertical (cairo_scaled_font_t *scaled_font)
{
cairo_ft_scaled_font_t *ft_scaled_font;
if (!_cairo_scaled_font_is_ft (scaled_font))
return FALSE;
ft_scaled_font = (cairo_ft_scaled_font_t *) scaled_font;
if (ft_scaled_font->ft_options.load_flags & FT_LOAD_VERTICAL_LAYOUT)
return TRUE;
return FALSE;
}
unsigned int
_cairo_ft_scaled_font_get_load_flags (cairo_scaled_font_t *scaled_font)
{
cairo_ft_scaled_font_t *ft_scaled_font;
if (! _cairo_scaled_font_is_ft (scaled_font))
return 0;
ft_scaled_font = (cairo_ft_scaled_font_t *) scaled_font;
return ft_scaled_font->ft_options.load_flags;
}
void
_cairo_ft_font_reset_static_data (void)
{
_cairo_ft_unscaled_font_map_destroy ();
}
|