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
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Primitives</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2">
<link rel="start" href="index.html" title="COGL 0.8.0 Reference Manual">
<link rel="up" href="ch01.html" title="COGL - GL Abstraction API">
<link rel="prev" href="cogl-General-API.html" title="General API">
<link rel="next" href="cogl-Utility-API.html" title="Utility API">
<meta name="generator" content="GTK-Doc V1.10 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
<link rel="chapter" href="ch01.html" title="COGL - GL Abstraction API">
<link rel="index" href="ix01.html" title="Index">
<link rel="appendix" href="license.html" title="Appendix A. License">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="cogl-General-API.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">COGL 0.8.0
Reference Manual</th>
<td><a accesskey="n" href="cogl-Utility-API.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts"><nobr><a href="#cogl-Primitives.synopsis" class="shortcut">Top</a>
|
<a href="#cogl-Primitives.description" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="cogl-Primitives"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cogl-Primitives.top_of_page"></a>Primitives</span></h2>
<p>Primitives — Functions that draw various primitive shapes and
allow for construction of more complex paths.</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cogl-Primitives.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
void <a class="link" href="cogl-Primitives.html#cogl-color" title="cogl_color ()">cogl_color</a> (const <a
href="../clutter/clutter-Colors.html#ClutterColor"
>ClutterColor</a> *color);
void <a class="link" href="cogl-Primitives.html#cogl-path-fill" title="cogl_path_fill ()">cogl_path_fill</a> (void);
void <a class="link" href="cogl-Primitives.html#cogl-path-stroke" title="cogl_path_stroke ()">cogl_path_stroke</a> (void);
void <a class="link" href="cogl-Primitives.html#cogl-path-move-to" title="cogl_path_move_to ()">cogl_path_move_to</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);
void <a class="link" href="cogl-Primitives.html#cogl-path-close" title="cogl_path_close ()">cogl_path_close</a> (void);
void <a class="link" href="cogl-Primitives.html#cogl-path-line-to" title="cogl_path_line_to ()">cogl_path_line_to</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);
void <a class="link" href="cogl-Primitives.html#cogl-path-curve-to" title="cogl_path_curve_to ()">cogl_path_curve_to</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x3,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y3);
void <a class="link" href="cogl-Primitives.html#cogl-path-arc" title="cogl_path_arc ()">cogl_path_arc</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterAngle"
>ClutterAngle</a> angle_1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterAngle"
>ClutterAngle</a> angle_2);
void <a class="link" href="cogl-Primitives.html#cogl-path-rel-move-to" title="cogl_path_rel_move_to ()">cogl_path_rel_move_to</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);
void <a class="link" href="cogl-Primitives.html#cogl-path-rel-line-to" title="cogl_path_rel_line_to ()">cogl_path_rel_line_to</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);
void <a class="link" href="cogl-Primitives.html#cogl-path-rel-curve-to" title="cogl_path_rel_curve_to ()">cogl_path_rel_curve_to</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x3,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y3);
void <a class="link" href="cogl-Primitives.html#cogl-path-line" title="cogl_path_line ()">cogl_path_line</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y2);
void <a class="link" href="cogl-Primitives.html#cogl-path-polyline" title="cogl_path_polyline ()">cogl_path_polyline</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> *coords,
gint num_points);
void <a class="link" href="cogl-Primitives.html#cogl-path-polygon" title="cogl_path_polygon ()">cogl_path_polygon</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> *coords,
gint num_points);
void <a class="link" href="cogl-Primitives.html#cogl-path-rectangle" title="cogl_path_rectangle ()">cogl_path_rectangle</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height);
void <a class="link" href="cogl-Primitives.html#cogl-path-round-rectangle" title="cogl_path_round_rectangle ()">cogl_path_round_rectangle</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterAngle"
>ClutterAngle</a> arc_step);
void <a class="link" href="cogl-Primitives.html#cogl-path-ellipse" title="cogl_path_ellipse ()">cogl_path_ellipse</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_y);
void <a class="link" href="cogl-Primitives.html#cogl-rectangle" title="cogl_rectangle ()">cogl_rectangle</a> (gint x,
gint y,
guint width,
guint height);
void <a class="link" href="cogl-Primitives.html#cogl-rectanglex" title="cogl_rectanglex ()">cogl_rectanglex</a> (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="cogl-Primitives.description"></a><h2>Description</h2>
<p>
There are three levels on which drawing with cogl can be used. The
highest level functions construct various simple primitive shapes
to be either filled or stroked. Using a lower-level set of functions
more complex and arbitrary paths can be constructed by concatenating
straight line, bezier curve and arc segments. Additionally there
are utility functions that draw the most common primitives - rectangles
and trapezoids - in a maximaly optimized fashion.
</p>
<p>
When constructing arbitrary paths, the current pen location is
initialized using the move_to command. The subsequent path segments
implicitly use the last pen location as their first vertex and move
the pen location to the last vertex they produce at the end. Also
there are special versions of functions that allow specifying the
vertices of the path segments relative to the last pen location
rather then in the absolute coordinates.</p>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="cogl-Primitives.details"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="cogl-color"></a><h3>cogl_color ()</h3>
<pre class="programlisting">void cogl_color (const <a
href="../clutter/clutter-Colors.html#ClutterColor"
>ClutterColor</a> *color);</pre>
<p>
Changes the color of cogl's current paint, which is used for filling and stroking
primitives.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>color</code></em> :</span></p></td>
<td> new current <em class="parameter"><code>ClutterColor</code></em>.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-fill"></a><h3>cogl_path_fill ()</h3>
<pre class="programlisting">void cogl_path_fill (void);</pre>
<p>
Fills the constructed shape using the current drawing color.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-stroke"></a><h3>cogl_path_stroke ()</h3>
<pre class="programlisting">void cogl_path_stroke (void);</pre>
<p>
Strokes the constructed shape using the current drawing color
and a width of 1 pixel (regardless of the current transformation
matrix).</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-move-to"></a><h3>cogl_path_move_to ()</h3>
<pre class="programlisting">void cogl_path_move_to (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);</pre>
<p>
Clears the previously constructed shape and begins a new path
contour by moving the pen to the given coordinates.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X coordinate of the pen location to move to.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y coordinate of the pen location to move to.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-close"></a><h3>cogl_path_close ()</h3>
<pre class="programlisting">void cogl_path_close (void);</pre>
<p>
Closes the path being constructed by adding a straight line segment
to it that ends at the first vertex of the path.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-line-to"></a><h3>cogl_path_line_to ()</h3>
<pre class="programlisting">void cogl_path_line_to (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);</pre>
<p>
Adds a straight line segment to the current path that ends at the
given coordinates.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X coordinate of the end line vertex
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y coordinate of the end line vertex
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-curve-to"></a><h3>cogl_path_curve_to ()</h3>
<pre class="programlisting">void cogl_path_curve_to (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x3,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y3);</pre>
<p>
Adds a cubic bezier curve segment to the current path with the given
second, third and fourth control points and using current pen location
as the first control point.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1</code></em> :</span></p></td>
<td> X coordinate of the second bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1</code></em> :</span></p></td>
<td> Y coordinate of the second bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x2</code></em> :</span></p></td>
<td> X coordinate of the third bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y2</code></em> :</span></p></td>
<td> Y coordinate of the third bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x3</code></em> :</span></p></td>
<td> X coordinate of the fourth bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y3</code></em> :</span></p></td>
<td> Y coordinate of the fourth bezier control point
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-arc"></a><h3>cogl_path_arc ()</h3>
<pre class="programlisting">void cogl_path_arc (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterAngle"
>ClutterAngle</a> angle_1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterAngle"
>ClutterAngle</a> angle_2);</pre>
<p>
Adds an elliptical arc segment to the current path. A straight line
segment will link the current pen location with the first vertex
of the arc. If you perform a move_to to the arcs start just before
drawing it you create a free standing arc.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>center_x</code></em> :</span></p></td>
<td> X coordinate of the elliptical arc center
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>center_y</code></em> :</span></p></td>
<td> Y coordinate of the elliptical arc center
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>radius_x</code></em> :</span></p></td>
<td> X radius of the elliptical arc
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>radius_y</code></em> :</span></p></td>
<td> Y radious of the elliptical arc
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>angle_1</code></em> :</span></p></td>
<td> Angle in the unit-circle at which the arc begin
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>angle_2</code></em> :</span></p></td>
<td> Angle in the unit-circle at which the arc ends
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-rel-move-to"></a><h3>cogl_path_rel_move_to ()</h3>
<pre class="programlisting">void cogl_path_rel_move_to (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);</pre>
<p>
Clears the previously constructed shape and begins a new path
contour by moving the pen to the given coordinates relative
to the current pen location.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X offset from the current pen location to move the pen to.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y offset from the current pen location to move the pen to.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-rel-line-to"></a><h3>cogl_path_rel_line_to ()</h3>
<pre class="programlisting">void cogl_path_rel_line_to (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y);</pre>
<p>
Adds a straight line segment to the current path that ends at the
given coordinates relative to the current pen location.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X offset from the current pen location of the end line vertex
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y offset from the current pen location of the end line vertex
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-rel-curve-to"></a><h3>cogl_path_rel_curve_to ()</h3>
<pre class="programlisting">void cogl_path_rel_curve_to (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x3,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y3);</pre>
<p>
Adds a cubic bezier curve segment to the current path with the given
second, third and fourth control points and using current pen location
as the first control point. The given coordinates are relative to the
current pen location.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1</code></em> :</span></p></td>
<td> X coordinate of the second bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1</code></em> :</span></p></td>
<td> Y coordinate of the second bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x2</code></em> :</span></p></td>
<td> X coordinate of the third bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y2</code></em> :</span></p></td>
<td> Y coordinate of the third bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x3</code></em> :</span></p></td>
<td> X coordinate of the fourth bezier control point
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y3</code></em> :</span></p></td>
<td> Y coordinate of the fourth bezier control point
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-line"></a><h3>cogl_path_line ()</h3>
<pre class="programlisting">void cogl_path_line (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y1,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x2,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y2);</pre>
<p>
Clears the previously constructed shape and constructs a straight
line shape start and ending at the given coordinates.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1</code></em> :</span></p></td>
<td> X coordinate of the start line vertex
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1</code></em> :</span></p></td>
<td> Y coordinate of the start line vertex
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x2</code></em> :</span></p></td>
<td> X coordinate of the end line vertex
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y2</code></em> :</span></p></td>
<td> Y coordinate of the end line vertex
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-polyline"></a><h3>cogl_path_polyline ()</h3>
<pre class="programlisting">void cogl_path_polyline (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> *coords,
gint num_points);</pre>
<p>
Clears the previously constructed shape and constructs a series of straight
line segments, starting from the first given vertex coordinate. Each
subsequent segment stars where the previous one ended and ends at the next
given vertex coordinate.
</p>
<p>
The coords array must contain 2 * num_points values. The first value
represents the X coordinate of the first vertex, the second value
represents the Y coordinate of the first vertex, continuing in the same
fashion for the rest of the vertices. (num_points - 1) segments will
be constructed.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>coords</code></em> :</span></p></td>
<td> A pointer to the first element of an array of fixed-point
values that specify the vertex coordinates.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>num_points</code></em> :</span></p></td>
<td> The total number of vertices.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-polygon"></a><h3>cogl_path_polygon ()</h3>
<pre class="programlisting">void cogl_path_polygon (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> *coords,
gint num_points);</pre>
<p>
Clears the previously constructed shape and constructs a polygonal
shape of the given number of vertices.
</p>
<p>
The coords array must contain 2 * num_points values. The first value
represents the X coordinate of the first vertex, the second value
represents the Y coordinate of the first vertex, continuing in the same
fashion for the rest of the vertices.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>coords</code></em> :</span></p></td>
<td> A pointer to the first element of an array of fixed-point
values that specify the vertex coordinates.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>num_points</code></em> :</span></p></td>
<td> The total number of vertices.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-rectangle"></a><h3>cogl_path_rectangle ()</h3>
<pre class="programlisting">void cogl_path_rectangle (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height);</pre>
<p>
Clears the previously constructed shape and constructs a rectangular
shape at the given coordinates.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X coordinate of the top-left corner.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y coordinate of the top-left corner.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td> Rectangle width.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td> Rectangle height.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-round-rectangle"></a><h3>cogl_path_round_rectangle ()</h3>
<pre class="programlisting">void cogl_path_round_rectangle (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterAngle"
>ClutterAngle</a> arc_step);</pre>
<p>
Clears the previously constructed shape and constructs a rectangular
shape with rounded corners.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X coordinate of the top-left corner
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y coordinate of the top-left corner
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td> Width of the rectangle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td> Height of the rectangle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>radius</code></em> :</span></p></td>
<td> Radius of the corner arcs.
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>arc_step</code></em> :</span></p></td>
<td> Angle increment resolution for subdivision of
the corner arcs.
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-path-ellipse"></a><h3>cogl_path_ellipse ()</h3>
<pre class="programlisting">void cogl_path_ellipse (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> center_y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> radius_y);</pre>
<p>
Clears the previously constructed shape and constructs an ellipse
shape.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>center_x</code></em> :</span></p></td>
<td> X coordinate of the ellipse center
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>center_y</code></em> :</span></p></td>
<td> Y coordinate of the ellipse center
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>radius_x</code></em> :</span></p></td>
<td> X radius of the ellipse
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>radius_y</code></em> :</span></p></td>
<td> Y radius of the ellipse
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-rectangle"></a><h3>cogl_rectangle ()</h3>
<pre class="programlisting">void cogl_rectangle (gint x,
gint y,
guint width,
guint height);</pre>
<p>
Fills a rectangle at the given coordinates with the current
drawing color in a highly optimizied fashion.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X coordinate of the top-left corner
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y coordinate of the top-left corner
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td> Width of the rectangle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td> Height of the rectangle
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="cogl-rectanglex"></a><h3>cogl_rectanglex ()</h3>
<pre class="programlisting">void cogl_rectanglex (<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> x,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> y,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> width,
<a
href="../clutter/clutter-Fixed-Point-Support.html#ClutterFixed"
>ClutterFixed</a> height);</pre>
<p>
A fixed-point version of cogl_fast_fill_rectangle.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td> X coordinate of the top-left corner
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td> Y coordinate of the top-left corner
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>width</code></em> :</span></p></td>
<td> Width of the rectangle
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>height</code></em> :</span></p></td>
<td> Height of the rectangle
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.10</div>
</body>
</html>
|
