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comparison: gfx/cairo/clip-rects-surface-extents.patch

gfx/cairo/clip-rects-surface-extents.patch

branch
TOR_BUG_9701
changeset 15
b8a032363ba2
equal deleted inserted replaced
-1:000000000000 0:6c2b6089f89e
1 From 108b1c7825116ed3f93aa57384bbd3290cdc9181 Mon Sep 17 00:00:00 2001
2 From: Karl Tomlinson <karlt+@karlt.net>
3 Date: Sat, 17 Jul 2010 01:08:53 +0000
4 Subject: clip: consider gstate target extents in _cairo_gstate_copy_clip_rectangle_list
5
6 Fixes https://bugs.freedesktop.org/show_bug.cgi?id=29125
7
8 To be consistent with _cairo_gstate_clip_extents, the context's clip
9 should be intersected with the target surface extents (instead of only
10 using them when there is no clip).
11
12 Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
13 ---
14 diff --git a/src/cairo-clip.c b/src/cairo-clip.c
15 index 77d8214..d5a2fab 100644
16 --- a/src/cairo-clip.c
17 +++ b/src/cairo-clip.c
18 @@ -1495,7 +1495,7 @@ _cairo_rectangle_list_create_in_error (cairo_status_t status)
19 cairo_rectangle_list_t *
20 _cairo_clip_copy_rectangle_list (cairo_clip_t *clip, cairo_gstate_t *gstate)
21 {
22 -#define ERROR_LIST(S) _cairo_rectangle_list_create_in_error (_cairo_error (S));
23 +#define ERROR_LIST(S) _cairo_rectangle_list_create_in_error (_cairo_error (S))
24
25 cairo_rectangle_list_t *list;
26 cairo_rectangle_t *rectangles = NULL;
27 @@ -1507,57 +1507,37 @@ _cairo_clip_copy_rectangle_list (cairo_clip_t *clip, cairo_gstate_t *gstate)
28 if (clip->all_clipped)
29 goto DONE;
30
31 - if (clip->path != NULL) {
32 - status = _cairo_clip_get_region (clip, &region);
33 - if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) {
34 - goto DONE;
35 - } else if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
36 - return ERROR_LIST (CAIRO_STATUS_CLIP_NOT_REPRESENTABLE)
37 - } else if (unlikely (status)) {
38 - return ERROR_LIST (status);
39 - }
40 - }
41 -
42 - if (region != NULL) {
43 - n_rects = cairo_region_num_rectangles (region);
44 - if (n_rects) {
45 - rectangles = _cairo_malloc_ab (n_rects, sizeof (cairo_rectangle_t));
46 - if (unlikely (rectangles == NULL)) {
47 - return ERROR_LIST (CAIRO_STATUS_NO_MEMORY);
48 - }
49 + if (!clip->path)
50 + return ERROR_LIST (CAIRO_STATUS_CLIP_NOT_REPRESENTABLE);
51
52 - for (i = 0; i < n_rects; ++i) {
53 - cairo_rectangle_int_t clip_rect;
54 -
55 - cairo_region_get_rectangle (region, i, &clip_rect);
56 + status = _cairo_clip_get_region (clip, &region);
57 + if (status == CAIRO_INT_STATUS_NOTHING_TO_DO) {
58 + goto DONE;
59 + } else if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
60 + return ERROR_LIST (CAIRO_STATUS_CLIP_NOT_REPRESENTABLE);
61 + } else if (unlikely (status)) {
62 + return ERROR_LIST (status);
63 + }
64
65 - if (! _cairo_clip_int_rect_to_user (gstate,
66 - &clip_rect,
67 - &rectangles[i]))
68 - {
69 - free (rectangles);
70 - return ERROR_LIST (CAIRO_STATUS_CLIP_NOT_REPRESENTABLE);
71 - }
72 - }
73 + n_rects = cairo_region_num_rectangles (region);
74 + if (n_rects) {
75 + rectangles = _cairo_malloc_ab (n_rects, sizeof (cairo_rectangle_t));
76 + if (unlikely (rectangles == NULL)) {
77 + return ERROR_LIST (CAIRO_STATUS_NO_MEMORY);
78 }
79 - } else {
80 - cairo_rectangle_int_t extents;
81
82 - if (! _cairo_surface_get_extents (_cairo_gstate_get_target (gstate),
83 - &extents))
84 - {
85 - /* unbounded surface -> unclipped */
86 - goto DONE;
87 - }
88 + for (i = 0; i < n_rects; ++i) {
89 + cairo_rectangle_int_t clip_rect;
90
91 - n_rects = 1;
92 - rectangles = malloc(sizeof (cairo_rectangle_t));
93 - if (unlikely (rectangles == NULL))
94 - return ERROR_LIST (CAIRO_STATUS_NO_MEMORY);
95 + cairo_region_get_rectangle (region, i, &clip_rect);
96
97 - if (! _cairo_clip_int_rect_to_user (gstate, &extents, rectangles)) {
98 - free (rectangles);
99 - return ERROR_LIST (CAIRO_STATUS_CLIP_NOT_REPRESENTABLE);
100 + if (! _cairo_clip_int_rect_to_user (gstate,
101 + &clip_rect,
102 + &rectangles[i]))
103 + {
104 + free (rectangles);
105 + return ERROR_LIST (CAIRO_STATUS_CLIP_NOT_REPRESENTABLE);
106 + }
107 }
108 }
109
110 diff --git a/src/cairo-gstate.c b/src/cairo-gstate.c
111 index baf6145..7caf624 100644
112 --- a/src/cairo-gstate.c
113 +++ b/src/cairo-gstate.c
114 @@ -1555,7 +1555,19 @@ _cairo_gstate_clip_extents (cairo_gstate_t *gstate,
115 cairo_rectangle_list_t*
116 _cairo_gstate_copy_clip_rectangle_list (cairo_gstate_t *gstate)
117 {
118 - return _cairo_clip_copy_rectangle_list (&gstate->clip, gstate);
119 + cairo_clip_t clip;
120 + cairo_rectangle_int_t extents;
121 + cairo_rectangle_list_t *list;
122 +
123 + _cairo_clip_init_copy (&clip, &gstate->clip);
124 +
125 + if (_cairo_surface_get_extents (gstate->target, &extents))
126 + _cairo_clip_rectangle (&clip, &extents);
127 +
128 + list = _cairo_clip_copy_rectangle_list (&clip, gstate);
129 + _cairo_clip_fini (&clip);
130 +
131 + return list;
132 }
133
134 static void
135 diff --git a/test/get-clip.c b/test/get-clip.c
136 index f0477a1..f97db3f 100644
137 --- a/test/get-clip.c
138 +++ b/test/get-clip.c
139 @@ -120,6 +120,22 @@ preamble (cairo_test_context_t *ctx)
140 }
141 cairo_rectangle_list_destroy (rectangle_list);
142
143 + /* We should get the same results after applying a clip that contains the
144 + existing clip. */
145 + phase = "Clip beyond surface extents";
146 + cairo_save (cr);
147 + cairo_rectangle (cr, -10, -10, SIZE + 20 , SIZE + 20);
148 + cairo_clip (cr);
149 + rectangle_list = cairo_copy_clip_rectangle_list (cr);
150 + if (! check_count (ctx, phase, rectangle_list, 1) ||
151 + ! check_clip_extents (ctx, phase, cr, 0, 0, SIZE, SIZE) ||
152 + ! check_rectangles_contain (ctx, phase, rectangle_list, 0, 0, SIZE, SIZE))
153 + {
154 + goto FAIL;
155 + }
156 + cairo_rectangle_list_destroy (rectangle_list);
157 + cairo_restore (cr);
158 +
159 /* Test simple clip rect. */
160 phase = "Simple clip rect";
161 cairo_save (cr);
162 --
163 cgit v0.8.3-6-g21f6

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