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| Rev 1892 | Rev 3959 | ||
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| Line 33... | Line 33... | ||
| 33 | * Chris Wilson |
33 | * Chris Wilson |
| 34 | */ |
34 | */ |
| Line 35... | Line 35... | ||
| 35 | 35 | ||
| Line -... | Line 36... | ||
| - | 36 | #include "cairoint.h" |
|
| 36 | #include "cairoint.h" |
37 | |
| Line 37... | Line 38... | ||
| 37 | 38 | #include "cairo-clip-inline.h" |
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| Line -... | Line 39... | ||
| - | 39 | #include "cairo-surface-clipper-private.h" |
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| - | 40 | ||
| - | 41 | /* A collection of routines to facilitate vector surface clipping */ |
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| - | 42 | ||
| - | 43 | /* XXX Eliminate repeated paths and nested clips */ |
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| - | 44 | ||
| - | 45 | static cairo_status_t |
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| - | 46 | _cairo_path_fixed_add_box (cairo_path_fixed_t *path, |
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| - | 47 | const cairo_box_t *box) |
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| - | 48 | { |
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| - | 49 | cairo_status_t status; |
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| - | 50 | ||
| - | 51 | status = _cairo_path_fixed_move_to (path, box->p1.x, box->p1.y); |
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| - | 52 | if (unlikely (status)) |
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| - | 53 | return status; |
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| - | 54 | ||
| - | 55 | status = _cairo_path_fixed_line_to (path, box->p2.x, box->p1.y); |
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| - | 56 | if (unlikely (status)) |
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| - | 57 | return status; |
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| - | 58 | ||
| - | 59 | status = _cairo_path_fixed_line_to (path, box->p2.x, box->p2.y); |
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| - | 60 | if (unlikely (status)) |
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| - | 61 | return status; |
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| - | 62 | ||
| - | 63 | status = _cairo_path_fixed_line_to (path, box->p1.x, box->p2.y); |
|
| - | 64 | if (unlikely (status)) |
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| - | 65 | return status; |
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| - | 66 | ||
| - | 67 | return _cairo_path_fixed_close_path (path); |
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| - | 68 | } |
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| - | 69 | ||
| - | 70 | static cairo_status_t |
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| - | 71 | _cairo_surface_clipper_intersect_clip_boxes (cairo_surface_clipper_t *clipper, |
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| - | 72 | const cairo_clip_t *clip) |
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| - | 73 | { |
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| - | 74 | cairo_path_fixed_t path; |
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| - | 75 | cairo_status_t status; |
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| - | 76 | int i; |
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| - | 77 | ||
| - | 78 | if (clip->num_boxes == 0) |
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| - | 79 | return CAIRO_STATUS_SUCCESS; |
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| - | 80 | ||
| - | 81 | /* Reconstruct the path for the clip boxes. |
|
| - | 82 | * XXX maybe a new clipper callback? |
|
| - | 83 | */ |
|
| - | 84 | ||
| - | 85 | _cairo_path_fixed_init (&path); |
|
| - | 86 | for (i = 0; i < clip->num_boxes; i++) { |
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| - | 87 | status = _cairo_path_fixed_add_box (&path, &clip->boxes[i]); |
|
| - | 88 | if (unlikely (status)) { |
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| - | 89 | _cairo_path_fixed_fini (&path); |
|
| - | 90 | return status; |
|
| - | 91 | } |
|
| - | 92 | } |
|
| - | 93 | ||
| - | 94 | status = clipper->intersect_clip_path (clipper, &path, |
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| - | 95 | CAIRO_FILL_RULE_WINDING, |
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| - | 96 | 0., |
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| - | 97 | CAIRO_ANTIALIAS_DEFAULT); |
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| - | 98 | _cairo_path_fixed_fini (&path); |
|
| 38 | #include "cairo-surface-clipper-private.h" |
99 | |
| 39 | 100 | return status; |
|
| 40 | /* A collection of routines to facilitate vector surface clipping */ |
101 | } |
| - | 102 | ||
| 41 | 103 | static cairo_status_t |
|
| 42 | static cairo_status_t |
104 | _cairo_surface_clipper_intersect_clip_path_recursive (cairo_surface_clipper_t *clipper, |
| Line 43... | Line 105... | ||
| 43 | _cairo_surface_clipper_intersect_clip_path_recursive (cairo_surface_clipper_t *clipper, |
105 | cairo_clip_path_t *clip_path, |
| 44 | cairo_clip_path_t *clip_path) |
106 | cairo_clip_path_t *end) |
| 45 | { |
107 | { |
| 46 | cairo_status_t status; |
108 | cairo_status_t status; |
| - | 109 | ||
| 47 | 110 | if (clip_path->prev != end) { |
|
| 48 | if (clip_path->prev != NULL) { |
111 | status = |
| 49 | status = |
112 | _cairo_surface_clipper_intersect_clip_path_recursive (clipper, |
| Line 50... | Line 113... | ||
| 50 | _cairo_surface_clipper_intersect_clip_path_recursive (clipper, |
113 | clip_path->prev, |
| Line 60... | Line 123... | ||
| 60 | clip_path->antialias); |
123 | clip_path->antialias); |
| 61 | } |
124 | } |
| Line 62... | Line 125... | ||
| 62 | 125 | ||
| 63 | cairo_status_t |
126 | cairo_status_t |
| 64 | _cairo_surface_clipper_set_clip (cairo_surface_clipper_t *clipper, |
127 | _cairo_surface_clipper_set_clip (cairo_surface_clipper_t *clipper, |
| 65 | cairo_clip_t *clip) |
128 | const cairo_clip_t *clip) |
| 66 | { |
129 | { |
| 67 | cairo_status_t status; |
130 | cairo_status_t status; |
| 68 | cairo_bool_t clear; |
- | |
| 69 | - | ||
| 70 | /* XXX as we cache a reference to the path, and compare every time, |
- | |
| 71 | * we may in future need to install a notification if the clip->path |
- | |
| 72 | * is every modified (e.g. cairo_clip_translate). |
- | |
| Line 73... | Line 131... | ||
| 73 | */ |
131 | cairo_bool_t incremental = FALSE; |
| 74 | 132 | ||
| Line -... | Line 133... | ||
| - | 133 | if (_cairo_clip_equal (clip, clipper->clip)) |
|
| - | 134 | return CAIRO_STATUS_SUCCESS; |
|
| - | 135 | ||
| - | 136 | /* all clipped out state should never propagate this far */ |
|
| 75 | if (clip == NULL && clipper->clip.path == NULL) |
137 | assert (!_cairo_clip_is_all_clipped (clip)); |
| - | 138 | ||
| 76 | return CAIRO_STATUS_SUCCESS; |
139 | /* XXX Is this an incremental clip? */ |
| - | 140 | if (clipper->clip && clip && |
|
| 77 | 141 | clip->num_boxes == clipper->clip->num_boxes && |
|
| - | 142 | memcmp (clip->boxes, clipper->clip->boxes, |
|
| - | 143 | sizeof (cairo_box_t) * clip->num_boxes) == 0) |
|
| - | 144 | { |
|
| - | 145 | cairo_clip_path_t *clip_path = clip->path; |
|
| - | 146 | while (clip_path != NULL && clip_path != clipper->clip->path) |
|
| 78 | if (clip != NULL && clipper->clip.path != NULL && |
147 | clip_path = clip_path->prev; |
| - | 148 | ||
| - | 149 | if (clip_path) { |
|
| - | 150 | incremental = TRUE; |
|
| - | 151 | status = _cairo_surface_clipper_intersect_clip_path_recursive (clipper, |
|
| 79 | _cairo_clip_equal (clip, &clipper->clip)) |
152 | clip->path, |
| Line 80... | Line 153... | ||
| 80 | { |
153 | clipper->clip->path); |
| 81 | return CAIRO_STATUS_SUCCESS; |
154 | } |
| Line 82... | Line -... | ||
| 82 | } |
- | |
| 83 | - | ||
| 84 | /* all clipped out state should never propagate this far */ |
155 | } |
| 85 | assert (clip == NULL || clip->path != NULL); |
- | |
| 86 | - | ||
| 87 | /* Check whether this clip is a continuation of the previous. |
156 | |
| 88 | * If not, we have to remove the current clip and rebuild. |
- | |
| Line 89... | Line -... | ||
| 89 | */ |
- | |
| 90 | clear = clip == NULL || clip->path->prev != clipper->clip.path; |
- | |
| 91 | 157 | _cairo_clip_destroy (clipper->clip); |
|
| 92 | _cairo_clip_reset (&clipper->clip); |
158 | clipper->clip = _cairo_clip_copy (clip); |
| 93 | _cairo_clip_init_copy (&clipper->clip, clip); |
159 | |
| Line 94... | Line 160... | ||
| 94 | 160 | if (incremental) |
|
| 95 | if (clear) { |
161 | return status; |
| - | 162 | ||
| 96 | clipper->is_clipped = FALSE; |
163 | status = clipper->intersect_clip_path (clipper, NULL, 0, 0, 0); |
| 97 | status = clipper->intersect_clip_path (clipper, NULL, 0, 0, 0); |
- | |
| 98 | if (unlikely (status)) |
164 | if (unlikely (status)) |
| 99 | return status; |
- | |
| 100 | 165 | return status; |
|
| 101 | if (clip != NULL && clip->path != NULL) { |
- | |
| Line 102... | Line 166... | ||
| 102 | status = |
166 | |
| 103 | _cairo_surface_clipper_intersect_clip_path_recursive (clipper, |
167 | if (clip == NULL) |
| 104 | clip->path); |
168 | return CAIRO_STATUS_SUCCESS; |
| 105 | clipper->is_clipped = TRUE; |
- | |
| 106 | } |
- | |
| 107 | } else { |
169 | |
| 108 | cairo_clip_path_t *path = clip->path; |
170 | status = _cairo_surface_clipper_intersect_clip_boxes (clipper, clip); |
| Line 109... | Line 171... | ||
| 109 | 171 | if (unlikely (status)) |
|
| 110 | clipper->is_clipped = TRUE; |
172 | return status; |
| Line 111... | Line 173... | ||
| 111 | status = clipper->intersect_clip_path (clipper, |
173 | |
| 112 | &path->path, |
174 | if (clip->path != NULL) { |
| 113 | path->fill_rule, |
175 | status = _cairo_surface_clipper_intersect_clip_path_recursive (clipper, |
| 114 | path->tolerance, |
176 | clip->path, |
| 115 | path->antialias); |
- | |
| 116 | } |
177 | NULL); |
| 117 | 178 | } |
|
| 118 | return status; |
179 | |
| Line 119... | Line 180... | ||
| 119 | } |
180 | return status; |
| 120 | 181 | } |
|
| 121 | void |
182 | |
| 122 | _cairo_surface_clipper_init (cairo_surface_clipper_t *clipper, |
183 | void |
| 123 | cairo_surface_clipper_intersect_clip_path_func_t func) |
184 | _cairo_surface_clipper_init (cairo_surface_clipper_t *clipper, |
| 124 | { |
185 | cairo_surface_clipper_intersect_clip_path_func_t func) |