summaryrefslogtreecommitdiffstats
path: root/meta/packages/cairo/files/cairo-surface-cache-3.patch
blob: ba714359a6ac745180fd57e4b0178d28d8189d44 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
diff --git a/src/cairo-clip.c b/src/cairo-clip.c
diff --git a/src/cairo-color.c b/src/cairo-color.c
index a348839..0688167 100644
--- a/src/cairo-color.c
+++ b/src/cairo-color.c
@@ -159,3 +159,10 @@ _cairo_color_get_rgba_premultiplied (cai
     *blue  = color->blue  * color->alpha;
     *alpha = color->alpha;
 }
+
+cairo_bool_t
+_cairo_color_equal (cairo_color_t *color_a,
+                    cairo_color_t *color_b)
+{
+    return (memcmp (color_a, color_b, sizeof (cairo_color_t)) == 0);
+}
diff --git a/src/cairo-directfb-surface.c b/src/cairo-directfb-surface.c
index 686510d..96ee212 100644
--- a/src/cairo-directfb-surface.c
+++ b/src/cairo-directfb-surface.c
@@ -1514,6 +1514,15 @@ _cairo_directfb_surface_show_glyphs ( vo
 }
 #endif /* DFB_SHOW_GLYPHS */
 
+static cairo_bool_t
+_cairo_directfb_surface_is_compatible (void *surface_a,
+                                       void *surface_b)
+{
+    cairo_directfb_surface_t *a = (cairo_directfb_surface_t*) surface_a;
+    cairo_directfb_surface_t *b = (cairo_directfb_surface_t*) surface_b;
+
+    return (a->dfb == b->dfb);
+}
 
 static cairo_surface_backend_t cairo_directfb_surface_backend = {
          CAIRO_SURFACE_TYPE_DIRECTFB, /*type*/
@@ -1564,7 +1573,8 @@ #if DFB_SHOW_GLYPHS
 #else
         NULL, /* show_glyphs */
 #endif
-        NULL /* snapshot */
+        NULL, /* snapshot */
+        _cairo_directfb_is_compatible
 };
 
 
diff --git a/src/cairo-ft-font.c b/src/cairo-ft-font.c
diff --git a/src/cairo-glitz-surface.c b/src/cairo-glitz-surface.c
index f492739..79e0162 100644
--- a/src/cairo-glitz-surface.c
+++ b/src/cairo-glitz-surface.c
@@ -1799,6 +1799,19 @@ _cairo_glitz_surface_scaled_glyph_fini (
     }
 }
 
+static cairo_bool_t
+_cairo_glitz_surface_is_compatible (void *surface_a,
+                                    void *surface_b)
+{
+    cairo_glitz_surface_t *a = (cairo_glitz_surface_t*) surface_a;
+    cairo_glitz_surface_t *b = (cairo_glitz_surface_t*) surface_b;
+
+    glitz_drawable *drawable_a = glitz_surface_get_drawable (a->surface);
+    glitz_drawable *drawable_b = glitz_surface_get_drawable (b->surface);
+
+    return (drawable_a == drawable_b);
+}
+
 #define FIXED_TO_FLOAT(f) (((glitz_float_t) (f)) / 65536)
 
 static cairo_status_t
@@ -2194,7 +2207,16 @@ static const cairo_surface_backend_t cai
     _cairo_glitz_surface_flush,
     NULL, /* mark_dirty_rectangle */
     _cairo_glitz_surface_scaled_font_fini,
-    _cairo_glitz_surface_scaled_glyph_fini
+    _cairo_glitz_surface_scaled_glyph_fini,
+
+    NULL, /* paint */
+    NULL, /* mask */
+    NULL, /* stroke */
+    NULL, /* fill */
+    NULL, /* show_glyphs */
+
+    NULL, /* snapshot */
+    _cairo_glitz_surface_is_compatible
 };
 
 static const cairo_surface_backend_t *
diff --git a/src/cairo-gstate.c b/src/cairo-gstate.c
diff --git a/src/cairo-meta-surface.c b/src/cairo-meta-surface.c
diff --git a/src/cairo-pattern.c b/src/cairo-pattern.c
index b488d1f..28f8561 100644
--- a/src/cairo-pattern.c
+++ b/src/cairo-pattern.c
@@ -1020,6 +1020,8 @@ _cairo_pattern_acquire_surface_for_gradi
     return status;
 }
 
+#define MAX_CACHE_SIZE 16
+
 static cairo_int_status_t
 _cairo_pattern_acquire_surface_for_solid (cairo_solid_pattern_t	     *pattern,
 					  cairo_surface_t	     *dst,
@@ -1030,12 +1032,59 @@ _cairo_pattern_acquire_surface_for_solid
 					  cairo_surface_t	     **out,
 					  cairo_surface_attributes_t *attribs)
 {
-    *out = _cairo_surface_create_similar_solid (dst,
-						CAIRO_CONTENT_COLOR_ALPHA,
-						1, 1,
-						&pattern->color);
-    if ((*out)->status)
-	return CAIRO_STATUS_NO_MEMORY;
+    /* We have a small cache here, because we don't want to constantly
+     * recreate surfaces for simple solid colors */
+    static struct {
+        cairo_color_t    color;
+        cairo_surface_t *surface;
+    } cache[MAX_CACHE_SIZE];
+    static int cache_size = 0;
+    static int i = 0;
+    CAIRO_MUTEX_DECLARE (cache_lock);
+
+    cairo_surface_t *surface;
+    cairo_status_t status;
+
+    CAIRO_MUTEX_LOCK (cache_lock);
+
+    /* Check cache first */
+    if (i < cache_size)
+        if (_cairo_color_equal (&cache[i].color, &pattern->color) &&
+            _cairo_surface_is_compatible (cache[i].surface, dst))
+            goto DONE;
+
+    for (i = 0; i < cache_size; i++)
+        if (_cairo_color_equal (&cache[i].color, &pattern->color) &&
+            _cairo_surface_is_compatible (cache[i].surface, dst))
+            goto DONE;
+
+    /* Not cached, need to create new */
+    surface = _cairo_surface_create_similar_solid (dst,
+						   CAIRO_CONTENT_COLOR_ALPHA,
+						   1, 1,
+						   &pattern->color);
+    if (surface->status) {
+        status = CAIRO_STATUS_NO_MEMORY;
+
+	goto UNLOCK;
+    }
+
+    /* Cache new */
+    if (cache_size < MAX_CACHE_SIZE)
+        cache_size++;
+    else {
+        i = rand () % MAX_CACHE_SIZE;
+
+        /* Evict old */
+        cairo_surface_destroy (cache[i].surface);
+    }
+
+    cache[i].color   = pattern->color;
+    cache[i].surface = surface;
+
+DONE:
+
+    *out = cairo_surface_reference (cache[i].surface);
 
     attribs->x_offset = attribs->y_offset = 0;
     cairo_matrix_init_identity (&attribs->matrix);
@@ -1043,7 +1092,13 @@ _cairo_pattern_acquire_surface_for_solid
     attribs->filter = CAIRO_FILTER_NEAREST;
     attribs->acquired = FALSE;
 
-    return CAIRO_STATUS_SUCCESS;
+    status = CAIRO_STATUS_SUCCESS;
+
+UNLOCK:
+
+    CAIRO_MUTEX_UNLOCK (cache_lock);
+
+    return status;
 }
 
 /**
diff --git a/src/cairo-scaled-font.c b/src/cairo-scaled-font.c
diff --git a/src/cairo-surface-fallback.c b/src/cairo-surface-fallback.c
diff --git a/src/cairo-surface.c b/src/cairo-surface.c
index 2bff0da..78cad9b 100644
--- a/src/cairo-surface.c
+++ b/src/cairo-surface.c
@@ -1078,6 +1078,32 @@ _cairo_surface_snapshot (cairo_surface_t
     return _cairo_surface_fallback_snapshot (surface);
 }
 
+/**
+ * _cairo_surface_is_compatible
+ * @surface_a: a #cairo_surface_t
+ * @surface_b: a #cairo_surface_t
+ *
+ * Find out whether the given surfaces share the same backend,
+ * and if so, whether they can be considered compatible.
+ *
+ * The definition of "compatible" depends on the backend. In the
+ * xlib case, it means the surfaces share the same display.
+ *
+ * Return value: TRUE if the surfaces are compatible.
+ **/
+cairo_bool_t
+_cairo_surface_is_compatible (cairo_surface_t *surface_a,
+                              cairo_surface_t *surface_b)
+{
+    if (surface_a->backend != surface_b->backend)
+        return FALSE;
+
+    if (surface_a->backend->is_compatible)
+        return surface_a->backend->is_compatible (surface_a, surface_b);
+
+    return TRUE;
+}
+
 cairo_status_t
 _cairo_surface_composite (cairo_operator_t	op,
 			  cairo_pattern_t	*src,
diff --git a/src/cairo-win32-surface.c b/src/cairo-win32-surface.c
index be7e706..81eb916 100644
--- a/src/cairo-win32-surface.c
+++ b/src/cairo-win32-surface.c
@@ -1609,6 +1609,16 @@ _cairo_win32_surface_show_glyphs (void		
     return (win_result) ? CAIRO_STATUS_SUCCESS : CAIRO_INT_STATUS_UNSUPPORTED;
 }
 
+static cairo_bool_t
+_cairo_win32_surface_is_compatible (void *surface_a,
+                                    void *surface_b)
+{
+    cairo_win32_surface_t *a = (cairo_win32_surface_t*) surface_a;
+    cairo_win32_surface_t *b = (cairo_win32_surface_t*) surface_b;
+
+    return (a->dc == b->dc);
+}
+
 #undef STACK_GLYPH_SIZE
 
 /**
@@ -1879,7 +1889,8 @@ static const cairo_surface_backend_t cai
     NULL, /* fill */
     _cairo_win32_surface_show_glyphs,
 
-    NULL  /* snapshot */
+    NULL, /* snapshot */
+    _cairo_win32_surface_is_compatible
 };
 
 /*
diff --git a/src/cairo-xcb-surface.c b/src/cairo-xcb-surface.c
index 2fdf8a1..8df859d 100644
--- a/src/cairo-xcb-surface.c
+++ b/src/cairo-xcb-surface.c
@@ -1578,6 +1578,10 @@ _cairo_xcb_surface_show_glyphs (void    
 				 int		      num_glyphs,
 				 cairo_scaled_font_t *scaled_font);
 
+static cairo_bool_t
+_cairo_xcb_surface_is_compatible (void *surface_a,
+                                  void *surface_b);
+
 /* XXX: move this to the bottom of the file, XCB and Xlib */
 
 static const cairo_surface_backend_t cairo_xcb_surface_backend = {
@@ -1609,7 +1613,8 @@ static const cairo_surface_backend_t cai
     NULL, /* stroke */
     NULL, /* fill */
     _cairo_xcb_surface_show_glyphs,
-    NULL  /* snapshot */
+    NULL, /* snapshot */
+    _cairo_xcb_surface_is_compatible
 };
 
 /**
@@ -2451,3 +2456,13 @@ _cairo_xcb_surface_show_glyphs (void    
 
     return status;
 }
+
+static cairo_bool_t
+_cairo_xcb_surface_is_compatible (void *surface_a,
+                                  void *surface_b)
+{
+    cairo_xcb_surface_t *a = (cairo_xcb_surface_t*) surface_a;
+    cairo_xcb_surface_t *b = (cairo_xcb_surface_t*) surface_b;
+
+    return (a->dpy == b->dpy);
+}
diff --git a/src/cairo-xlib-surface.c b/src/cairo-xlib-surface.c
index 6a0d3e4..9228c95 100644
--- a/src/cairo-xlib-surface.c
+++ b/src/cairo-xlib-surface.c
@@ -74,6 +74,10 @@ _cairo_xlib_surface_show_glyphs (void   
 				 int		      num_glyphs,
 				 cairo_scaled_font_t *scaled_font);
 
+static cairo_bool_t
+_cairo_xlib_surface_is_compatible (void *surface_a,
+                                   void *surface_b);
+
 /*
  * Instead of taking two round trips for each blending request,
  * assume that if a particular drawable fails GetImage that it will
@@ -1783,7 +1787,8 @@ static const cairo_surface_backend_t cai
     NULL, /* stroke */
     NULL, /* fill */
     _cairo_xlib_surface_show_glyphs,
-    NULL  /* snapshot */
+    NULL, /* snapshot */
+    _cairo_xlib_surface_is_compatible
 };
 
 /**
@@ -2913,3 +2918,13 @@ _cairo_xlib_surface_show_glyphs (void   
 
     return status;
 }
+
+static cairo_bool_t
+_cairo_xlib_surface_is_compatible (void *surface_a,
+                                   void *surface_b)
+{
+    cairo_xlib_surface_t *a = (cairo_xlib_surface_t*) surface_a;
+    cairo_xlib_surface_t *b = (cairo_xlib_surface_t*) surface_b;
+
+    return (a->dpy == b->dpy);
+}
diff --git a/src/cairo.c b/src/cairo.c
diff --git a/src/cairoint.h b/src/cairoint.h
index 060b988..01c0e2a 100755
--- a/src/cairoint.h
+++ b/src/cairoint.h
@@ -933,6 +933,10 @@ struct _cairo_surface_backend {
 
     cairo_surface_t *
     (*snapshot)			(void			*surface);
+
+    cairo_bool_t
+    (*is_compatible)            (void                   *surface_a,
+                                 void                   *surface_b);
 };
 
 typedef struct _cairo_format_masks {
@@ -1497,6 +1501,10 @@ _cairo_color_get_rgba_premultiplied (cai
 				     double	   *blue,
 				     double	   *alpha);
 
+cairo_private cairo_bool_t
+_cairo_color_equal (cairo_color_t *color_a,
+                    cairo_color_t *color_b);
+
 /* cairo-font.c */
 
 cairo_private void
@@ -1922,6 +1930,10 @@ _cairo_surface_clone_similar (cairo_surf
 cairo_private cairo_surface_t *
 _cairo_surface_snapshot (cairo_surface_t *surface);
 
+cairo_private cairo_bool_t
+_cairo_surface_is_compatible (cairo_surface_t *surface_a,
+                              cairo_surface_t *surface_b);
+
 cairo_private unsigned int
 _cairo_surface_get_current_clip_serial (cairo_surface_t *surface);