1 | /* GTK - The GIMP Toolkit |
2 | * Copyright (C) 2016 Benjamin Otte <otte@gnome.org> |
3 | * |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2 of the License, or (at your option) any later version. |
8 | * |
9 | * This library is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library. If not, see <http://www.gnu.org/licenses/>. |
16 | */ |
17 | |
18 | #include "config.h" |
19 | |
20 | #include "gtksnapshot.h" |
21 | #include "gtksnapshotprivate.h" |
22 | |
23 | #include "gtkcsscolorvalueprivate.h" |
24 | #include "gtkcssshadowvalueprivate.h" |
25 | #include "gtkdebug.h" |
26 | #include "gtkrenderbackgroundprivate.h" |
27 | #include "gtkrenderborderprivate.h" |
28 | #include "gtkrendericonprivate.h" |
29 | #include "gtkrendernodepaintableprivate.h" |
30 | #include "gtkstylecontextprivate.h" |
31 | #include "gsktransformprivate.h" |
32 | |
33 | #include "gdk/gdkrgbaprivate.h" |
34 | |
35 | #include "gsk/gskrendernodeprivate.h" |
36 | #include "gsk/gskroundedrectprivate.h" |
37 | |
38 | #include "gtk/gskpango.h" |
39 | |
40 | #define GDK_ARRAY_NAME gtk_snapshot_nodes |
41 | #define GDK_ARRAY_TYPE_NAME GtkSnapshotNodes |
42 | #define GDK_ARRAY_ELEMENT_TYPE GskRenderNode * |
43 | #define GDK_ARRAY_FREE_FUNC gsk_render_node_unref |
44 | #include "gdk/gdkarrayimpl.c" |
45 | |
46 | /** |
47 | * GtkSnapshot: |
48 | * |
49 | * `GtkSnapshot` assists in creating [class@Gsk.RenderNode]s for widgets. |
50 | * |
51 | * It functions in a similar way to a cairo context, and maintains a stack |
52 | * of render nodes and their associated transformations. |
53 | * |
54 | * The node at the top of the stack is the one that `gtk_snapshot_append_…()` |
55 | * functions operate on. Use the `gtk_snapshot_push_…()` functions and |
56 | * [method@Snapshot.pop] to change the current node. |
57 | * |
58 | * The typical way to obtain a `GtkSnapshot` object is as an argument to |
59 | * the [vfunc@Gtk.Widget.snapshot] vfunc. If you need to create your own |
60 | * `GtkSnapshot`, use [ctor@Gtk.Snapshot.new]. |
61 | */ |
62 | |
63 | typedef struct _GtkSnapshotState GtkSnapshotState; |
64 | |
65 | typedef GskRenderNode * (* GtkSnapshotCollectFunc) (GtkSnapshot *snapshot, |
66 | GtkSnapshotState *state, |
67 | GskRenderNode **nodes, |
68 | guint n_nodes); |
69 | typedef void (* GtkSnapshotClearFunc) (GtkSnapshotState *state); |
70 | |
71 | struct _GtkSnapshotState { |
72 | guint start_node_index; |
73 | guint n_nodes; |
74 | |
75 | GskTransform * transform; |
76 | |
77 | GtkSnapshotCollectFunc collect_func; |
78 | GtkSnapshotClearFunc clear_func; |
79 | union { |
80 | struct { |
81 | double opacity; |
82 | } opacity; |
83 | struct { |
84 | double radius; |
85 | } blur; |
86 | struct { |
87 | graphene_matrix_t matrix; |
88 | graphene_vec4_t offset; |
89 | } color_matrix; |
90 | struct { |
91 | graphene_rect_t bounds; |
92 | graphene_rect_t child_bounds; |
93 | } repeat; |
94 | struct { |
95 | graphene_rect_t bounds; |
96 | } clip; |
97 | struct { |
98 | GskGLShader *shader; |
99 | GBytes *args; |
100 | graphene_rect_t bounds; |
101 | GskRenderNode **nodes; |
102 | GskRenderNode *internal_nodes[4]; |
103 | } glshader; |
104 | struct { |
105 | graphene_rect_t bounds; |
106 | int node_idx; |
107 | int n_children; |
108 | } glshader_texture; |
109 | struct { |
110 | GskRoundedRect bounds; |
111 | } rounded_clip; |
112 | struct { |
113 | gsize n_shadows; |
114 | GskShadow *shadows; |
115 | GskShadow a_shadow; /* Used if n_shadows == 1 */ |
116 | } shadow; |
117 | struct { |
118 | GskBlendMode blend_mode; |
119 | GskRenderNode *bottom_node; |
120 | } blend; |
121 | struct { |
122 | double progress; |
123 | GskRenderNode *start_node; |
124 | } cross_fade; |
125 | struct { |
126 | char *message; |
127 | } debug; |
128 | } data; |
129 | }; |
130 | |
131 | static void gtk_snapshot_state_clear (GtkSnapshotState *state); |
132 | |
133 | #define GDK_ARRAY_NAME gtk_snapshot_states |
134 | #define GDK_ARRAY_TYPE_NAME GtkSnapshotStates |
135 | #define GDK_ARRAY_ELEMENT_TYPE GtkSnapshotState |
136 | #define GDK_ARRAY_FREE_FUNC gtk_snapshot_state_clear |
137 | #define GDK_ARRAY_BY_VALUE 1 |
138 | #define GDK_ARRAY_PREALLOC 16 |
139 | #define GDK_ARRAY_NO_MEMSET 1 |
140 | #include "gdk/gdkarrayimpl.c" |
141 | |
142 | /* This is a nasty little hack. We typedef GtkSnapshot to the fake object GdkSnapshot |
143 | * so that we don't need to typecast between them. |
144 | * After all, the GdkSnapshot only exist so poor language bindings don't trip. Hardcore |
145 | * C code can just blatantly ignore such layering violations with a typedef. |
146 | */ |
147 | struct _GdkSnapshot { |
148 | GObject parent_instance; /* it's really GdkSnapshot, but don't tell anyone! */ |
149 | |
150 | GtkSnapshotStates state_stack; |
151 | GtkSnapshotNodes nodes; |
152 | }; |
153 | |
154 | struct _GtkSnapshotClass { |
155 | GObjectClass parent_class; /* it's really GdkSnapshotClass, but don't tell anyone! */ |
156 | }; |
157 | |
158 | G_DEFINE_TYPE (GtkSnapshot, gtk_snapshot, GDK_TYPE_SNAPSHOT) |
159 | |
160 | static void |
161 | gtk_snapshot_dispose (GObject *object) |
162 | { |
163 | GtkSnapshot *snapshot = GTK_SNAPSHOT (object); |
164 | |
165 | if (!gtk_snapshot_states_is_empty (self: &snapshot->state_stack)) |
166 | { |
167 | GskRenderNode *node = gtk_snapshot_to_node (snapshot); |
168 | g_clear_pointer (&node, gsk_render_node_unref); |
169 | } |
170 | |
171 | g_assert (gtk_snapshot_states_is_empty (&snapshot->state_stack)); |
172 | g_assert (gtk_snapshot_nodes_is_empty (&snapshot->nodes)); |
173 | |
174 | G_OBJECT_CLASS (gtk_snapshot_parent_class)->dispose (object); |
175 | } |
176 | |
177 | static void |
178 | gtk_snapshot_class_init (GtkSnapshotClass *klass) |
179 | { |
180 | GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
181 | |
182 | gobject_class->dispose = gtk_snapshot_dispose; |
183 | } |
184 | |
185 | static GskRenderNode * |
186 | gtk_snapshot_collect_default (GtkSnapshot *snapshot, |
187 | GtkSnapshotState *state, |
188 | GskRenderNode **nodes, |
189 | guint n_nodes) |
190 | { |
191 | GskRenderNode *node; |
192 | |
193 | if (n_nodes == 0) |
194 | { |
195 | node = NULL; |
196 | } |
197 | else if (n_nodes == 1) |
198 | { |
199 | node = gsk_render_node_ref (node: nodes[0]); |
200 | } |
201 | else |
202 | { |
203 | node = gsk_container_node_new (children: nodes, n_children: n_nodes); |
204 | } |
205 | |
206 | return node; |
207 | } |
208 | |
209 | static GtkSnapshotState * |
210 | gtk_snapshot_push_state (GtkSnapshot *snapshot, |
211 | GskTransform *transform, |
212 | GtkSnapshotCollectFunc collect_func, |
213 | GtkSnapshotClearFunc clear_func) |
214 | { |
215 | const gsize n_states = gtk_snapshot_states_get_size (self: &snapshot->state_stack); |
216 | GtkSnapshotState *state; |
217 | |
218 | gtk_snapshot_states_set_size (self: &snapshot->state_stack, new_size: n_states + 1); |
219 | state = gtk_snapshot_states_get (self: &snapshot->state_stack, pos: n_states); |
220 | |
221 | state->transform = gsk_transform_ref (self: transform); |
222 | state->collect_func = collect_func; |
223 | state->clear_func = clear_func; |
224 | state->start_node_index = gtk_snapshot_nodes_get_size (self: &snapshot->nodes); |
225 | state->n_nodes = 0; |
226 | |
227 | return state; |
228 | } |
229 | |
230 | static GtkSnapshotState * |
231 | gtk_snapshot_get_current_state (const GtkSnapshot *snapshot) |
232 | { |
233 | gsize size = gtk_snapshot_states_get_size (self: &snapshot->state_stack); |
234 | |
235 | g_assert (size > 0); |
236 | |
237 | return gtk_snapshot_states_get (self: &snapshot->state_stack, pos: size - 1); |
238 | } |
239 | |
240 | static GtkSnapshotState * |
241 | gtk_snapshot_get_previous_state (const GtkSnapshot *snapshot) |
242 | { |
243 | gsize size = gtk_snapshot_states_get_size (self: &snapshot->state_stack); |
244 | |
245 | g_assert (size > 1); |
246 | |
247 | return gtk_snapshot_states_get (self: &snapshot->state_stack, pos: size - 2); |
248 | } |
249 | |
250 | /* n == 0 => current, n == 1, previous, etc */ |
251 | static GtkSnapshotState * |
252 | gtk_snapshot_get_nth_previous_state (const GtkSnapshot *snapshot, |
253 | int n) |
254 | { |
255 | gsize size = gtk_snapshot_states_get_size (self: &snapshot->state_stack); |
256 | |
257 | g_assert (size > n); |
258 | |
259 | return gtk_snapshot_states_get (self: &snapshot->state_stack, pos: size - (1 + n)); |
260 | } |
261 | |
262 | static void |
263 | gtk_snapshot_state_clear (GtkSnapshotState *state) |
264 | { |
265 | if (state->clear_func) |
266 | state->clear_func (state); |
267 | |
268 | gsk_transform_unref (self: state->transform); |
269 | } |
270 | |
271 | static void |
272 | gtk_snapshot_init (GtkSnapshot *self) |
273 | { |
274 | gtk_snapshot_states_init (self: &self->state_stack); |
275 | gtk_snapshot_nodes_init (self: &self->nodes); |
276 | |
277 | gtk_snapshot_push_state (snapshot: self, |
278 | NULL, |
279 | collect_func: gtk_snapshot_collect_default, |
280 | NULL); |
281 | } |
282 | |
283 | /** |
284 | * gtk_snapshot_new: |
285 | * |
286 | * Creates a new `GtkSnapshot`. |
287 | * |
288 | * Returns: a newly-allocated `GtkSnapshot` |
289 | */ |
290 | GtkSnapshot * |
291 | gtk_snapshot_new (void) |
292 | { |
293 | return g_object_new (GTK_TYPE_SNAPSHOT, NULL); |
294 | } |
295 | |
296 | /** |
297 | * gtk_snapshot_free_to_node: (skip) |
298 | * @snapshot: (transfer full): a `GtkSnapshot` |
299 | * |
300 | * Returns the node that was constructed by @snapshot |
301 | * and frees @snapshot. |
302 | * |
303 | * Returns: (transfer full) (nullable): a newly-created [class@Gsk.RenderNode] |
304 | */ |
305 | GskRenderNode * |
306 | gtk_snapshot_free_to_node (GtkSnapshot *snapshot) |
307 | { |
308 | GskRenderNode *result; |
309 | |
310 | result = gtk_snapshot_to_node (snapshot); |
311 | g_object_unref (object: snapshot); |
312 | |
313 | return result; |
314 | } |
315 | |
316 | /** |
317 | * gtk_snapshot_free_to_paintable: (skip) |
318 | * @snapshot: (transfer full): a `GtkSnapshot` |
319 | * @size: (nullable): The size of the resulting paintable |
320 | * or %NULL to use the bounds of the snapshot |
321 | * |
322 | * Returns a paintable for the node that was |
323 | * constructed by @snapshot and frees @snapshot. |
324 | * |
325 | * Returns: (transfer full) (nullable): a newly-created [iface@Gdk.Paintable] |
326 | */ |
327 | GdkPaintable * |
328 | gtk_snapshot_free_to_paintable (GtkSnapshot *snapshot, |
329 | const graphene_size_t *size) |
330 | { |
331 | GdkPaintable *result; |
332 | |
333 | result = gtk_snapshot_to_paintable (snapshot, size); |
334 | g_object_unref (object: snapshot); |
335 | |
336 | return result; |
337 | } |
338 | |
339 | static GskRenderNode * |
340 | gtk_snapshot_collect_autopush_transform (GtkSnapshot *snapshot, |
341 | GtkSnapshotState *state, |
342 | GskRenderNode **nodes, |
343 | guint n_nodes) |
344 | { |
345 | GskRenderNode *node, *transform_node; |
346 | GtkSnapshotState *previous_state; |
347 | |
348 | previous_state = gtk_snapshot_get_previous_state (snapshot); |
349 | |
350 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
351 | if (node == NULL) |
352 | return NULL; |
353 | |
354 | transform_node = gsk_transform_node_new (child: node, transform: previous_state->transform); |
355 | |
356 | gsk_render_node_unref (node); |
357 | |
358 | return transform_node; |
359 | } |
360 | |
361 | static void |
362 | gtk_snapshot_autopush_transform (GtkSnapshot *snapshot) |
363 | { |
364 | gtk_snapshot_push_state (snapshot, |
365 | NULL, |
366 | collect_func: gtk_snapshot_collect_autopush_transform, |
367 | NULL); |
368 | } |
369 | |
370 | static gboolean |
371 | gtk_snapshot_state_should_autopop (const GtkSnapshotState *state) |
372 | { |
373 | return state->collect_func == gtk_snapshot_collect_autopush_transform; |
374 | } |
375 | |
376 | static GskRenderNode * |
377 | gtk_snapshot_collect_debug (GtkSnapshot *snapshot, |
378 | GtkSnapshotState *state, |
379 | GskRenderNode **nodes, |
380 | guint n_nodes) |
381 | { |
382 | GskRenderNode *node, *debug_node; |
383 | |
384 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
385 | if (node == NULL) |
386 | return NULL; |
387 | |
388 | debug_node = gsk_debug_node_new (child: node, message: state->data.debug.message); |
389 | state->data.debug.message = NULL; |
390 | |
391 | gsk_render_node_unref (node); |
392 | |
393 | return debug_node; |
394 | } |
395 | |
396 | static void |
397 | gtk_snapshot_clear_debug (GtkSnapshotState *state) |
398 | { |
399 | g_clear_pointer (&state->data.debug.message, g_free); |
400 | } |
401 | |
402 | /** |
403 | * gtk_snapshot_push_debug: |
404 | * @snapshot: a `GtkSnapshot` |
405 | * @message: a printf-style format string |
406 | * @...: arguments for @message |
407 | * |
408 | * Inserts a debug node with a message. |
409 | * |
410 | * Debug nodes don't affect the rendering at all, but can be |
411 | * helpful in identifying parts of a render node tree dump, |
412 | * for example in the GTK inspector. |
413 | */ |
414 | void |
415 | gtk_snapshot_push_debug (GtkSnapshot *snapshot, |
416 | const char *message, |
417 | ...) |
418 | { |
419 | GtkSnapshotState *current_state = gtk_snapshot_get_current_state (snapshot); |
420 | |
421 | if (GTK_DEBUG_CHECK (SNAPSHOT)) |
422 | { |
423 | va_list args; |
424 | GtkSnapshotState *state; |
425 | |
426 | state = gtk_snapshot_push_state (snapshot, |
427 | transform: current_state->transform, |
428 | collect_func: gtk_snapshot_collect_debug, |
429 | clear_func: gtk_snapshot_clear_debug); |
430 | |
431 | |
432 | |
433 | va_start (args, message); |
434 | state->data.debug.message = g_strdup_vprintf (format: message, args); |
435 | va_end (args); |
436 | } |
437 | else |
438 | { |
439 | gtk_snapshot_push_state (snapshot, |
440 | transform: current_state->transform, |
441 | collect_func: gtk_snapshot_collect_default, |
442 | NULL); |
443 | } |
444 | } |
445 | |
446 | static GskRenderNode * |
447 | gtk_snapshot_collect_opacity (GtkSnapshot *snapshot, |
448 | GtkSnapshotState *state, |
449 | GskRenderNode **nodes, |
450 | guint n_nodes) |
451 | { |
452 | GskRenderNode *node, *opacity_node; |
453 | |
454 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
455 | if (node == NULL) |
456 | return NULL; |
457 | |
458 | if (state->data.opacity.opacity == 1.0) |
459 | { |
460 | opacity_node = node; |
461 | } |
462 | else if (state->data.opacity.opacity == 0.0) |
463 | { |
464 | GdkRGBA color = GDK_RGBA ("00000000" ); |
465 | graphene_rect_t bounds; |
466 | |
467 | gsk_render_node_get_bounds (node, bounds: &bounds); |
468 | opacity_node = gsk_color_node_new (rgba: &color, bounds: &bounds); |
469 | gsk_render_node_unref (node); |
470 | } |
471 | else |
472 | { |
473 | opacity_node = gsk_opacity_node_new (child: node, opacity: state->data.opacity.opacity); |
474 | gsk_render_node_unref (node); |
475 | } |
476 | |
477 | return opacity_node; |
478 | } |
479 | |
480 | /** |
481 | * gtk_snapshot_push_opacity: |
482 | * @snapshot: a `GtkSnapshot` |
483 | * @opacity: the opacity to use |
484 | * |
485 | * Modifies the opacity of an image. |
486 | * |
487 | * The image is recorded until the next call to [method@Gtk.Snapshot.pop]. |
488 | */ |
489 | void |
490 | gtk_snapshot_push_opacity (GtkSnapshot *snapshot, |
491 | double opacity) |
492 | { |
493 | GtkSnapshotState *current_state = gtk_snapshot_get_current_state (snapshot); |
494 | GtkSnapshotState *state; |
495 | |
496 | state = gtk_snapshot_push_state (snapshot, |
497 | transform: current_state->transform, |
498 | collect_func: gtk_snapshot_collect_opacity, |
499 | NULL); |
500 | state->data.opacity.opacity = CLAMP (opacity, 0.0, 1.0); |
501 | } |
502 | |
503 | static GskRenderNode * |
504 | gtk_snapshot_collect_blur (GtkSnapshot *snapshot, |
505 | GtkSnapshotState *state, |
506 | GskRenderNode **nodes, |
507 | guint n_nodes) |
508 | { |
509 | GskRenderNode *node, *blur_node; |
510 | double radius; |
511 | |
512 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
513 | if (node == NULL) |
514 | return NULL; |
515 | |
516 | radius = state->data.blur.radius; |
517 | |
518 | if (radius == 0.0) |
519 | return node; |
520 | |
521 | if (radius < 0) |
522 | return node; |
523 | |
524 | blur_node = gsk_blur_node_new (child: node, radius); |
525 | |
526 | gsk_render_node_unref (node); |
527 | |
528 | return blur_node; |
529 | } |
530 | |
531 | /** |
532 | * gtk_snapshot_push_blur: |
533 | * @snapshot: a `GtkSnapshot` |
534 | * @radius: the blur radius to use. Must be positive |
535 | * |
536 | * Blurs an image. |
537 | * |
538 | * The image is recorded until the next call to [method@Gtk.Snapshot.pop]. |
539 | */ |
540 | void |
541 | gtk_snapshot_push_blur (GtkSnapshot *snapshot, |
542 | double radius) |
543 | { |
544 | const GtkSnapshotState *current_state = gtk_snapshot_get_current_state (snapshot); |
545 | GtkSnapshotState *state; |
546 | |
547 | state = gtk_snapshot_push_state (snapshot, |
548 | transform: current_state->transform, |
549 | collect_func: gtk_snapshot_collect_blur, |
550 | NULL); |
551 | state->data.blur.radius = radius; |
552 | } |
553 | |
554 | static GskRenderNode * |
555 | merge_color_matrix_nodes (const graphene_matrix_t *matrix2, |
556 | const graphene_vec4_t *offset2, |
557 | GskRenderNode *child) |
558 | { |
559 | const graphene_matrix_t *mat1 = gsk_color_matrix_node_get_color_matrix (node: child); |
560 | const graphene_vec4_t *offset1 = gsk_color_matrix_node_get_color_offset (node: child); |
561 | graphene_matrix_t mat2 = *matrix2; |
562 | graphene_vec4_t off2 = *offset2; |
563 | GskRenderNode *result; |
564 | |
565 | g_assert (gsk_render_node_get_node_type (child) == GSK_COLOR_MATRIX_NODE); |
566 | |
567 | /* color matrix node: color = mat * p + offset; for a pixel p. |
568 | * color = mat1 * (mat2 * p + offset2) + offset1; |
569 | * = mat1 * mat2 * p + offset2 * mat1 + offset1 |
570 | * = (mat1 * mat2) * p + (offset2 * mat1 + offset1) |
571 | * Which this code does. |
572 | * mat1 and offset1 come from @child. |
573 | */ |
574 | |
575 | graphene_matrix_transform_vec4 (m: mat1, v: offset2, res: &off2); |
576 | graphene_vec4_add (a: &off2, b: offset1, res: &off2); |
577 | |
578 | graphene_matrix_multiply (a: mat1, b: &mat2, res: &mat2); |
579 | |
580 | result = gsk_color_matrix_node_new (child: gsk_color_matrix_node_get_child (node: child), |
581 | color_matrix: &mat2, color_offset: &off2); |
582 | |
583 | return result; |
584 | } |
585 | |
586 | static GskRenderNode * |
587 | gtk_snapshot_collect_color_matrix (GtkSnapshot *snapshot, |
588 | GtkSnapshotState *state, |
589 | GskRenderNode **nodes, |
590 | guint n_nodes) |
591 | { |
592 | GskRenderNode *node, *result; |
593 | |
594 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
595 | if (node == NULL) |
596 | return NULL; |
597 | |
598 | if (gsk_render_node_get_node_type (node) == GSK_COLOR_MATRIX_NODE) |
599 | { |
600 | result = merge_color_matrix_nodes (matrix2: &state->data.color_matrix.matrix, |
601 | offset2: &state->data.color_matrix.offset, |
602 | child: node); |
603 | gsk_render_node_unref (node); |
604 | } |
605 | else if (gsk_render_node_get_node_type (node) == GSK_TRANSFORM_NODE) |
606 | { |
607 | GskRenderNode *transform_child = gsk_transform_node_get_child (node); |
608 | GskRenderNode *color_matrix; |
609 | |
610 | if (gsk_render_node_get_node_type (node: transform_child) == GSK_COLOR_MATRIX_NODE) |
611 | { |
612 | color_matrix = merge_color_matrix_nodes (matrix2: &state->data.color_matrix.matrix, |
613 | offset2: &state->data.color_matrix.offset, |
614 | child: transform_child); |
615 | } |
616 | else |
617 | { |
618 | color_matrix = gsk_color_matrix_node_new (child: transform_child, |
619 | color_matrix: &state->data.color_matrix.matrix, |
620 | color_offset: &state->data.color_matrix.offset); |
621 | } |
622 | result = gsk_transform_node_new (child: color_matrix, |
623 | transform: gsk_transform_node_get_transform (node)); |
624 | gsk_render_node_unref (node: color_matrix); |
625 | gsk_render_node_unref (node); |
626 | node = NULL; |
627 | } |
628 | else |
629 | { |
630 | result = gsk_color_matrix_node_new (child: node, |
631 | color_matrix: &state->data.color_matrix.matrix, |
632 | color_offset: &state->data.color_matrix.offset); |
633 | gsk_render_node_unref (node); |
634 | } |
635 | |
636 | return result; |
637 | } |
638 | |
639 | /** |
640 | * gtk_snapshot_push_color_matrix: |
641 | * @snapshot: a `GtkSnapshot` |
642 | * @color_matrix: the color matrix to use |
643 | * @color_offset: the color offset to use |
644 | * |
645 | * Modifies the colors of an image by applying an affine transformation |
646 | * in RGB space. |
647 | * |
648 | * The image is recorded until the next call to [method@Gtk.Snapshot.pop]. |
649 | */ |
650 | void |
651 | gtk_snapshot_push_color_matrix (GtkSnapshot *snapshot, |
652 | const graphene_matrix_t *color_matrix, |
653 | const graphene_vec4_t *color_offset) |
654 | { |
655 | const GtkSnapshotState *current_state = gtk_snapshot_get_current_state (snapshot); |
656 | GtkSnapshotState *state; |
657 | |
658 | state = gtk_snapshot_push_state (snapshot, |
659 | transform: current_state->transform, |
660 | collect_func: gtk_snapshot_collect_color_matrix, |
661 | NULL); |
662 | |
663 | graphene_matrix_init_from_matrix (m: &state->data.color_matrix.matrix, src: color_matrix); |
664 | graphene_vec4_init_from_vec4 (v: &state->data.color_matrix.offset, src: color_offset); |
665 | } |
666 | |
667 | static GskRenderNode * |
668 | gtk_snapshot_collect_repeat (GtkSnapshot *snapshot, |
669 | GtkSnapshotState *state, |
670 | GskRenderNode **nodes, |
671 | guint n_nodes) |
672 | { |
673 | GskRenderNode *node, *repeat_node; |
674 | const graphene_rect_t *bounds = &state->data.repeat.bounds; |
675 | const graphene_rect_t *child_bounds = &state->data.repeat.child_bounds; |
676 | |
677 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
678 | if (node == NULL) |
679 | return NULL; |
680 | |
681 | if (gsk_render_node_get_node_type (node) == GSK_COLOR_NODE && |
682 | graphene_rect_equal (a: child_bounds, b: &node->bounds)) |
683 | { |
684 | /* Repeating a color node entirely is pretty easy by just increasing |
685 | * the size of the color node. */ |
686 | GskRenderNode *color_node = gsk_color_node_new (rgba: gsk_color_node_get_color (node), bounds); |
687 | |
688 | gsk_render_node_unref (node); |
689 | |
690 | return color_node; |
691 | } |
692 | |
693 | repeat_node = gsk_repeat_node_new (bounds, |
694 | child: node, |
695 | child_bounds: child_bounds->size.width > 0 ? child_bounds : NULL); |
696 | |
697 | gsk_render_node_unref (node); |
698 | |
699 | return repeat_node; |
700 | } |
701 | |
702 | static void |
703 | gtk_graphene_rect_scale_affine (const graphene_rect_t *rect, |
704 | float scale_x, |
705 | float scale_y, |
706 | float dx, |
707 | float dy, |
708 | graphene_rect_t *res) |
709 | { |
710 | res->origin.x = scale_x * rect->origin.x + dx; |
711 | res->origin.y = scale_y * rect->origin.y + dy; |
712 | res->size.width = scale_x * rect->size.width; |
713 | res->size.height = scale_y * rect->size.height; |
714 | |
715 | if (scale_x < 0 || scale_y < 0) |
716 | graphene_rect_normalize (r: res); |
717 | } |
718 | |
719 | static void |
720 | gtk_snapshot_ensure_affine (GtkSnapshot *snapshot, |
721 | float *scale_x, |
722 | float *scale_y, |
723 | float *dx, |
724 | float *dy) |
725 | { |
726 | const GtkSnapshotState *state = gtk_snapshot_get_current_state (snapshot); |
727 | |
728 | if (gsk_transform_get_category (state->transform) < GSK_TRANSFORM_CATEGORY_2D_AFFINE) |
729 | { |
730 | gtk_snapshot_autopush_transform (snapshot); |
731 | state = gtk_snapshot_get_current_state (snapshot); |
732 | gsk_transform_to_affine (self: state->transform, out_scale_x: scale_x, out_scale_y: scale_y, out_dx: dx, out_dy: dy); |
733 | } |
734 | else if (gsk_transform_get_category (state->transform) == GSK_TRANSFORM_CATEGORY_2D_AFFINE) |
735 | { |
736 | gsk_transform_to_affine (self: state->transform, out_scale_x: scale_x, out_scale_y: scale_y, out_dx: dx, out_dy: dy); |
737 | if (*scale_x < 0.0 || *scale_y < 0.0) |
738 | { |
739 | gtk_snapshot_autopush_transform (snapshot); |
740 | state = gtk_snapshot_get_current_state (snapshot); |
741 | gsk_transform_to_affine (self: state->transform, out_scale_x: scale_x, out_scale_y: scale_y, out_dx: dx, out_dy: dy); |
742 | } |
743 | } |
744 | else |
745 | { |
746 | gsk_transform_to_affine (self: state->transform, out_scale_x: scale_x, out_scale_y: scale_y, out_dx: dx, out_dy: dy); |
747 | } |
748 | } |
749 | |
750 | static void |
751 | gtk_snapshot_ensure_translate (GtkSnapshot *snapshot, |
752 | float *dx, |
753 | float *dy) |
754 | { |
755 | const GtkSnapshotState *state = gtk_snapshot_get_current_state (snapshot); |
756 | |
757 | if (gsk_transform_get_category (state->transform) < GSK_TRANSFORM_CATEGORY_2D_TRANSLATE) |
758 | { |
759 | gtk_snapshot_autopush_transform (snapshot); |
760 | state = gtk_snapshot_get_current_state (snapshot); |
761 | } |
762 | |
763 | gsk_transform_to_translate (self: state->transform, out_dx: dx, out_dy: dy); |
764 | } |
765 | |
766 | static void |
767 | gtk_snapshot_ensure_identity (GtkSnapshot *snapshot) |
768 | { |
769 | const GtkSnapshotState *state = gtk_snapshot_get_current_state (snapshot); |
770 | |
771 | if (gsk_transform_get_category (state->transform) < GSK_TRANSFORM_CATEGORY_IDENTITY) |
772 | gtk_snapshot_autopush_transform (snapshot); |
773 | } |
774 | |
775 | /** |
776 | * gtk_snapshot_push_repeat: |
777 | * @snapshot: a `GtkSnapshot` |
778 | * @bounds: the bounds within which to repeat |
779 | * @child_bounds: (nullable): the bounds of the child or %NULL |
780 | * to use the full size of the collected child node |
781 | * |
782 | * Creates a node that repeats the child node. |
783 | * |
784 | * The child is recorded until the next call to [method@Gtk.Snapshot.pop]. |
785 | */ |
786 | void |
787 | gtk_snapshot_push_repeat (GtkSnapshot *snapshot, |
788 | const graphene_rect_t *bounds, |
789 | const graphene_rect_t *child_bounds) |
790 | { |
791 | GtkSnapshotState *state; |
792 | graphene_rect_t real_child_bounds = { { 0 } }; |
793 | float scale_x, scale_y, dx, dy; |
794 | |
795 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
796 | |
797 | if (child_bounds) |
798 | gtk_graphene_rect_scale_affine (rect: child_bounds, scale_x, scale_y, dx, dy, res: &real_child_bounds); |
799 | |
800 | state = gtk_snapshot_push_state (snapshot, |
801 | transform: gtk_snapshot_get_current_state (snapshot)->transform, |
802 | collect_func: gtk_snapshot_collect_repeat, |
803 | NULL); |
804 | |
805 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &state->data.repeat.bounds); |
806 | state->data.repeat.child_bounds = real_child_bounds; |
807 | } |
808 | |
809 | static GskRenderNode * |
810 | gtk_snapshot_collect_clip (GtkSnapshot *snapshot, |
811 | GtkSnapshotState *state, |
812 | GskRenderNode **nodes, |
813 | guint n_nodes) |
814 | { |
815 | GskRenderNode *node, *clip_node; |
816 | |
817 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
818 | if (node == NULL) |
819 | return NULL; |
820 | |
821 | /* Check if the child node will even be clipped */ |
822 | if (graphene_rect_contains_rect (a: &state->data.clip.bounds, b: &node->bounds)) |
823 | return node; |
824 | |
825 | if (state->data.clip.bounds.size.width == 0 || |
826 | state->data.clip.bounds.size.height == 0) |
827 | return NULL; |
828 | |
829 | clip_node = gsk_clip_node_new (child: node, clip: &state->data.clip.bounds); |
830 | |
831 | gsk_render_node_unref (node); |
832 | |
833 | return clip_node; |
834 | } |
835 | |
836 | /** |
837 | * gtk_snapshot_push_clip: |
838 | * @snapshot: a `GtkSnapshot` |
839 | * @bounds: the rectangle to clip to |
840 | * |
841 | * Clips an image to a rectangle. |
842 | * |
843 | * The image is recorded until the next call to [method@Gtk.Snapshot.pop]. |
844 | */ |
845 | void |
846 | gtk_snapshot_push_clip (GtkSnapshot *snapshot, |
847 | const graphene_rect_t *bounds) |
848 | { |
849 | GtkSnapshotState *state; |
850 | float scale_x, scale_y, dx, dy; |
851 | |
852 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
853 | |
854 | state = gtk_snapshot_push_state (snapshot, |
855 | transform: gtk_snapshot_get_current_state (snapshot)->transform, |
856 | collect_func: gtk_snapshot_collect_clip, |
857 | NULL); |
858 | |
859 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &state->data.clip.bounds); |
860 | } |
861 | |
862 | static GskRenderNode * |
863 | gtk_snapshot_collect_gl_shader (GtkSnapshot *snapshot, |
864 | GtkSnapshotState *state, |
865 | GskRenderNode **collected_nodes, |
866 | guint n_collected_nodes) |
867 | { |
868 | GskRenderNode *shader_node = NULL; |
869 | GskRenderNode **nodes; |
870 | int n_children; |
871 | |
872 | n_children = gsk_gl_shader_get_n_textures (shader: state->data.glshader.shader); |
873 | shader_node = NULL; |
874 | |
875 | if (n_collected_nodes != 0) |
876 | g_warning ("Unexpected children when poping gl shader." ); |
877 | |
878 | if (state->data.glshader.nodes) |
879 | nodes = state->data.glshader.nodes; |
880 | else |
881 | nodes = &state->data.glshader.internal_nodes[0]; |
882 | |
883 | if (state->data.glshader.bounds.size.width != 0 && |
884 | state->data.glshader.bounds.size.height != 0) |
885 | shader_node = gsk_gl_shader_node_new (shader: state->data.glshader.shader, |
886 | bounds: &state->data.glshader.bounds, |
887 | args: state->data.glshader.args, |
888 | children: nodes, n_children); |
889 | |
890 | return shader_node; |
891 | } |
892 | |
893 | static void |
894 | gtk_snapshot_clear_gl_shader (GtkSnapshotState *state) |
895 | { |
896 | GskRenderNode **nodes; |
897 | guint i, n_children; |
898 | |
899 | n_children = gsk_gl_shader_get_n_textures (shader: state->data.glshader.shader); |
900 | |
901 | if (state->data.glshader.nodes) |
902 | nodes = state->data.glshader.nodes; |
903 | else |
904 | nodes = &state->data.glshader.internal_nodes[0]; |
905 | |
906 | g_object_unref (object: state->data.glshader.shader); |
907 | g_bytes_unref (bytes: state->data.glshader.args); |
908 | |
909 | for (i = 0; i < n_children; i++) |
910 | gsk_render_node_unref (node: nodes[i]); |
911 | |
912 | g_free (mem: state->data.glshader.nodes); |
913 | |
914 | } |
915 | |
916 | static GskRenderNode * |
917 | gtk_snapshot_collect_gl_shader_texture (GtkSnapshot *snapshot, |
918 | GtkSnapshotState *state, |
919 | GskRenderNode **nodes, |
920 | guint n_nodes) |
921 | { |
922 | GskRenderNode *child_node; |
923 | GdkRGBA transparent = { 0, 0, 0, 0 }; |
924 | int n_children, node_idx; |
925 | GtkSnapshotState *glshader_state; |
926 | GskRenderNode **out_nodes; |
927 | |
928 | child_node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
929 | |
930 | if (child_node == NULL) |
931 | child_node = gsk_color_node_new (rgba: &transparent, bounds: &state->data.glshader_texture.bounds); |
932 | |
933 | n_children = state->data.glshader_texture.n_children; |
934 | node_idx = state->data.glshader_texture.node_idx; |
935 | |
936 | glshader_state = gtk_snapshot_get_nth_previous_state (snapshot, n: n_children - node_idx); |
937 | g_assert (glshader_state->collect_func == gtk_snapshot_collect_gl_shader); |
938 | |
939 | if (glshader_state->data.glshader.nodes) |
940 | out_nodes = glshader_state->data.glshader.nodes; |
941 | else |
942 | out_nodes = &glshader_state->data.glshader.internal_nodes[0]; |
943 | |
944 | out_nodes[node_idx] = child_node; |
945 | |
946 | return NULL; |
947 | } |
948 | |
949 | /** |
950 | * gtk_snapshot_push_gl_shader: |
951 | * @snapshot: a `GtkSnapshot` |
952 | * @shader: The code to run |
953 | * @bounds: the rectangle to render into |
954 | * @take_args: (transfer full): Data block with arguments for the shader. |
955 | * |
956 | * Push a [class@Gsk.GLShaderNode]. |
957 | * |
958 | * The node uses the given [class@Gsk.GLShader] and uniform values |
959 | * Additionally this takes a list of @n_children other nodes |
960 | * which will be passed to the [class@Gsk.GLShaderNode]. |
961 | * |
962 | * The @take_args argument is a block of data to use for uniform |
963 | * arguments, as per types and offsets defined by the @shader. |
964 | * Normally this is generated by [method@Gsk.GLShader.format_args] |
965 | * or [struct@Gsk.ShaderArgsBuilder]. |
966 | * |
967 | * The snapshotter takes ownership of @take_args, so the caller should |
968 | * not free it after this. |
969 | * |
970 | * If the renderer doesn't support GL shaders, or if there is any |
971 | * problem when compiling the shader, then the node will draw pink. |
972 | * You should use [method@Gsk.GLShader.compile] to ensure the @shader |
973 | * will work for the renderer before using it. |
974 | * |
975 | * If the shader requires textures (see [method@Gsk.GLShader.get_n_textures]), |
976 | * then it is expected that you call [method@Gtk.Snapshot.gl_shader_pop_texture] |
977 | * the number of times that are required. Each of these calls will generate |
978 | * a node that is added as a child to the `GskGLShaderNode`, which in turn |
979 | * will render these offscreen and pass as a texture to the shader. |
980 | * |
981 | * Once all textures (if any) are pop:ed, you must call the regular |
982 | * [method@Gtk.Snapshot.pop]. |
983 | * |
984 | * If you want to use pre-existing textures as input to the shader rather |
985 | * than rendering new ones, use [method@Gtk.Snapshot.append_texture] to |
986 | * push a texture node. These will be used directly rather than being |
987 | * re-rendered. |
988 | * |
989 | * For details on how to write shaders, see [class@Gsk.GLShader]. |
990 | */ |
991 | void |
992 | gtk_snapshot_push_gl_shader (GtkSnapshot *snapshot, |
993 | GskGLShader *shader, |
994 | const graphene_rect_t *bounds, |
995 | GBytes *take_args) |
996 | { |
997 | GtkSnapshotState *state; |
998 | float scale_x, scale_y, dx, dy; |
999 | graphene_rect_t transformed_bounds; |
1000 | int n_children = gsk_gl_shader_get_n_textures (shader); |
1001 | |
1002 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
1003 | |
1004 | state = gtk_snapshot_push_state (snapshot, |
1005 | transform: gtk_snapshot_get_current_state (snapshot)->transform, |
1006 | collect_func: gtk_snapshot_collect_gl_shader, |
1007 | clear_func: gtk_snapshot_clear_gl_shader); |
1008 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &transformed_bounds); |
1009 | state->data.glshader.bounds = transformed_bounds; |
1010 | state->data.glshader.shader = g_object_ref (shader); |
1011 | state->data.glshader.args = take_args; /* Takes ownership */ |
1012 | if (n_children <= G_N_ELEMENTS (state->data.glshader.internal_nodes)) |
1013 | state->data.glshader.nodes = NULL; |
1014 | else |
1015 | state->data.glshader.nodes = g_new (GskRenderNode *, n_children); |
1016 | |
1017 | for (int i = 0; i < n_children; i++) |
1018 | { |
1019 | state = gtk_snapshot_push_state (snapshot, |
1020 | transform: gtk_snapshot_get_current_state (snapshot)->transform, |
1021 | collect_func: gtk_snapshot_collect_gl_shader_texture, |
1022 | NULL); |
1023 | state->data.glshader_texture.bounds = transformed_bounds; |
1024 | state->data.glshader_texture.node_idx = n_children - 1 - i;/* We pop in reverse order */ |
1025 | state->data.glshader_texture.n_children = n_children; |
1026 | } |
1027 | } |
1028 | |
1029 | static GskRenderNode * |
1030 | gtk_snapshot_collect_rounded_clip (GtkSnapshot *snapshot, |
1031 | GtkSnapshotState *state, |
1032 | GskRenderNode **nodes, |
1033 | guint n_nodes) |
1034 | { |
1035 | GskRenderNode *node, *clip_node; |
1036 | |
1037 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
1038 | if (node == NULL) |
1039 | return NULL; |
1040 | |
1041 | /* If the given radius is 0 in all corners, we can just create a normal clip node */ |
1042 | if (gsk_rounded_rect_is_rectilinear (self: &state->data.rounded_clip.bounds)) |
1043 | { |
1044 | /* ... and do the same optimization */ |
1045 | if (graphene_rect_contains_rect (a: &state->data.rounded_clip.bounds.bounds, b: &node->bounds)) |
1046 | return node; |
1047 | |
1048 | clip_node = gsk_clip_node_new (child: node, clip: &state->data.rounded_clip.bounds.bounds); |
1049 | } |
1050 | else |
1051 | { |
1052 | if (gsk_rounded_rect_contains_rect (self: &state->data.rounded_clip.bounds, rect: &node->bounds)) |
1053 | return node; |
1054 | |
1055 | clip_node = gsk_rounded_clip_node_new (child: node, clip: &state->data.rounded_clip.bounds); |
1056 | } |
1057 | |
1058 | if (clip_node->bounds.size.width == 0 || |
1059 | clip_node->bounds.size.height == 0) |
1060 | { |
1061 | gsk_render_node_unref (node); |
1062 | gsk_render_node_unref (node: clip_node); |
1063 | return NULL; |
1064 | } |
1065 | |
1066 | gsk_render_node_unref (node); |
1067 | |
1068 | return clip_node; |
1069 | } |
1070 | |
1071 | /** |
1072 | * gtk_snapshot_push_rounded_clip: |
1073 | * @snapshot: a `GtkSnapshot` |
1074 | * @bounds: the rounded rectangle to clip to |
1075 | * |
1076 | * Clips an image to a rounded rectangle. |
1077 | * |
1078 | * The image is recorded until the next call to [method@Gtk.Snapshot.pop]. |
1079 | */ |
1080 | void |
1081 | gtk_snapshot_push_rounded_clip (GtkSnapshot *snapshot, |
1082 | const GskRoundedRect *bounds) |
1083 | { |
1084 | GtkSnapshotState *state; |
1085 | float scale_x, scale_y, dx, dy; |
1086 | |
1087 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
1088 | |
1089 | state = gtk_snapshot_push_state (snapshot, |
1090 | transform: gtk_snapshot_get_current_state (snapshot)->transform, |
1091 | collect_func: gtk_snapshot_collect_rounded_clip, |
1092 | NULL); |
1093 | |
1094 | gsk_rounded_rect_scale_affine (dest: &state->data.rounded_clip.bounds, src: bounds, scale_x, scale_y, dx, dy); |
1095 | } |
1096 | |
1097 | static GskRenderNode * |
1098 | gtk_snapshot_collect_shadow (GtkSnapshot *snapshot, |
1099 | GtkSnapshotState *state, |
1100 | GskRenderNode **nodes, |
1101 | guint n_nodes) |
1102 | { |
1103 | GskRenderNode *node, *shadow_node; |
1104 | |
1105 | node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
1106 | if (node == NULL) |
1107 | return NULL; |
1108 | |
1109 | shadow_node = gsk_shadow_node_new (child: node, |
1110 | shadows: state->data.shadow.shadows != NULL ? |
1111 | state->data.shadow.shadows : |
1112 | &state->data.shadow.a_shadow, |
1113 | n_shadows: state->data.shadow.n_shadows); |
1114 | |
1115 | gsk_render_node_unref (node); |
1116 | |
1117 | return shadow_node; |
1118 | } |
1119 | |
1120 | static void |
1121 | gtk_snapshot_clear_shadow (GtkSnapshotState *state) |
1122 | { |
1123 | g_free (mem: state->data.shadow.shadows); |
1124 | } |
1125 | |
1126 | /** |
1127 | * gtk_snapshot_push_shadow: |
1128 | * @snapshot: a `GtkSnapshot` |
1129 | * @shadow: (array length=n_shadows): the first shadow specification |
1130 | * @n_shadows: number of shadow specifications |
1131 | * |
1132 | * Applies a shadow to an image. |
1133 | * |
1134 | * The image is recorded until the next call to [method@Gtk.Snapshot.pop]. |
1135 | */ |
1136 | void |
1137 | gtk_snapshot_push_shadow (GtkSnapshot *snapshot, |
1138 | const GskShadow *shadow, |
1139 | gsize n_shadows) |
1140 | { |
1141 | const GtkSnapshotState *current_state = gtk_snapshot_get_current_state (snapshot); |
1142 | GtkSnapshotState *state; |
1143 | |
1144 | state = gtk_snapshot_push_state (snapshot, |
1145 | transform: current_state->transform, |
1146 | collect_func: gtk_snapshot_collect_shadow, |
1147 | clear_func: gtk_snapshot_clear_shadow); |
1148 | |
1149 | state->data.shadow.n_shadows = n_shadows; |
1150 | if (n_shadows == 1) |
1151 | { |
1152 | state->data.shadow.shadows = NULL; |
1153 | memcpy (dest: &state->data.shadow.a_shadow, src: shadow, n: sizeof (GskShadow)); |
1154 | } |
1155 | else |
1156 | { |
1157 | state->data.shadow.shadows = g_malloc (n_bytes: sizeof (GskShadow) * n_shadows); |
1158 | memcpy (dest: state->data.shadow.shadows, src: shadow, n: sizeof (GskShadow) * n_shadows); |
1159 | } |
1160 | |
1161 | } |
1162 | |
1163 | static GskRenderNode * |
1164 | gtk_snapshot_collect_blend_top (GtkSnapshot *snapshot, |
1165 | GtkSnapshotState *state, |
1166 | GskRenderNode **nodes, |
1167 | guint n_nodes) |
1168 | { |
1169 | GskRenderNode *bottom_node, *top_node, *blend_node; |
1170 | GdkRGBA transparent = { 0, 0, 0, 0 }; |
1171 | |
1172 | top_node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
1173 | bottom_node = state->data.blend.bottom_node != NULL |
1174 | ? gsk_render_node_ref (node: state->data.blend.bottom_node) |
1175 | : NULL; |
1176 | |
1177 | g_assert (top_node != NULL || bottom_node != NULL); |
1178 | |
1179 | /* XXX: Is this necessary? Do we need a NULL node? */ |
1180 | if (top_node == NULL) |
1181 | top_node = gsk_color_node_new (rgba: &transparent, bounds: &bottom_node->bounds); |
1182 | if (bottom_node == NULL) |
1183 | bottom_node = gsk_color_node_new (rgba: &transparent, bounds: &top_node->bounds); |
1184 | |
1185 | blend_node = gsk_blend_node_new (bottom: bottom_node, top: top_node, blend_mode: state->data.blend.blend_mode); |
1186 | |
1187 | gsk_render_node_unref (node: top_node); |
1188 | gsk_render_node_unref (node: bottom_node); |
1189 | |
1190 | return blend_node; |
1191 | } |
1192 | |
1193 | static void |
1194 | gtk_snapshot_clear_blend_top (GtkSnapshotState *state) |
1195 | { |
1196 | g_clear_pointer (&(state->data.blend.bottom_node), gsk_render_node_unref); |
1197 | } |
1198 | |
1199 | static GskRenderNode * |
1200 | gtk_snapshot_collect_blend_bottom (GtkSnapshot *snapshot, |
1201 | GtkSnapshotState *state, |
1202 | GskRenderNode **nodes, |
1203 | guint n_nodes) |
1204 | { |
1205 | GtkSnapshotState *prev_state = gtk_snapshot_get_previous_state (snapshot); |
1206 | |
1207 | g_assert (prev_state->collect_func == gtk_snapshot_collect_blend_top); |
1208 | |
1209 | prev_state->data.blend.bottom_node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
1210 | |
1211 | return NULL; |
1212 | } |
1213 | |
1214 | /** |
1215 | * gtk_snapshot_push_blend: |
1216 | * @snapshot: a `GtkSnapshot` |
1217 | * @blend_mode: blend mode to use |
1218 | * |
1219 | * Blends together two images with the given blend mode. |
1220 | * |
1221 | * Until the first call to [method@Gtk.Snapshot.pop], the |
1222 | * bottom image for the blend operation will be recorded. |
1223 | * After that call, the top image to be blended will be |
1224 | * recorded until the second call to [method@Gtk.Snapshot.pop]. |
1225 | * |
1226 | * Calling this function requires two subsequent calls |
1227 | * to [method@Gtk.Snapshot.pop]. |
1228 | */ |
1229 | void |
1230 | gtk_snapshot_push_blend (GtkSnapshot *snapshot, |
1231 | GskBlendMode blend_mode) |
1232 | { |
1233 | GtkSnapshotState *current_state = gtk_snapshot_get_current_state (snapshot); |
1234 | GtkSnapshotState *top_state; |
1235 | |
1236 | top_state = gtk_snapshot_push_state (snapshot, |
1237 | transform: current_state->transform, |
1238 | collect_func: gtk_snapshot_collect_blend_top, |
1239 | clear_func: gtk_snapshot_clear_blend_top); |
1240 | top_state->data.blend.blend_mode = blend_mode; |
1241 | |
1242 | gtk_snapshot_push_state (snapshot, |
1243 | transform: top_state->transform, |
1244 | collect_func: gtk_snapshot_collect_blend_bottom, |
1245 | NULL); |
1246 | } |
1247 | |
1248 | static GskRenderNode * |
1249 | gtk_snapshot_collect_cross_fade_end (GtkSnapshot *snapshot, |
1250 | GtkSnapshotState *state, |
1251 | GskRenderNode **nodes, |
1252 | guint n_nodes) |
1253 | { |
1254 | GskRenderNode *start_node, *end_node, *node; |
1255 | |
1256 | end_node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
1257 | start_node = state->data.cross_fade.start_node; |
1258 | state->data.cross_fade.start_node = NULL; |
1259 | |
1260 | if (state->data.cross_fade.progress <= 0.0) |
1261 | { |
1262 | node = start_node; |
1263 | |
1264 | if (end_node) |
1265 | gsk_render_node_unref (node: end_node); |
1266 | } |
1267 | else if (state->data.cross_fade.progress >= 1.0) |
1268 | { |
1269 | node = end_node; |
1270 | |
1271 | if (start_node) |
1272 | gsk_render_node_unref (node: start_node); |
1273 | } |
1274 | else if (start_node && end_node) |
1275 | { |
1276 | node = gsk_cross_fade_node_new (start: start_node, end: end_node, progress: state->data.cross_fade.progress); |
1277 | |
1278 | gsk_render_node_unref (node: start_node); |
1279 | gsk_render_node_unref (node: end_node); |
1280 | } |
1281 | else if (start_node) |
1282 | { |
1283 | node = gsk_opacity_node_new (child: start_node, opacity: 1.0 - state->data.cross_fade.progress); |
1284 | |
1285 | gsk_render_node_unref (node: start_node); |
1286 | } |
1287 | else if (end_node) |
1288 | { |
1289 | node = gsk_opacity_node_new (child: end_node, opacity: state->data.cross_fade.progress); |
1290 | |
1291 | gsk_render_node_unref (node: end_node); |
1292 | } |
1293 | else |
1294 | { |
1295 | node = NULL; |
1296 | } |
1297 | |
1298 | return node; |
1299 | } |
1300 | |
1301 | static void |
1302 | gtk_snapshot_clear_cross_fade_end (GtkSnapshotState *state) |
1303 | { |
1304 | g_clear_pointer (&state->data.cross_fade.start_node, gsk_render_node_unref); |
1305 | } |
1306 | |
1307 | static GskRenderNode * |
1308 | gtk_snapshot_collect_cross_fade_start (GtkSnapshot *snapshot, |
1309 | GtkSnapshotState *state, |
1310 | GskRenderNode **nodes, |
1311 | guint n_nodes) |
1312 | { |
1313 | GtkSnapshotState *prev_state = gtk_snapshot_get_previous_state (snapshot); |
1314 | |
1315 | g_assert (prev_state->collect_func == gtk_snapshot_collect_cross_fade_end); |
1316 | |
1317 | prev_state->data.cross_fade.start_node = gtk_snapshot_collect_default (snapshot, state, nodes, n_nodes); |
1318 | |
1319 | return NULL; |
1320 | } |
1321 | |
1322 | /** |
1323 | * gtk_snapshot_push_cross_fade: |
1324 | * @snapshot: a `GtkSnapshot` |
1325 | * @progress: progress between 0.0 and 1.0 |
1326 | * |
1327 | * Snapshots a cross-fade operation between two images with the |
1328 | * given @progress. |
1329 | * |
1330 | * Until the first call to [method@Gtk.Snapshot.pop], the start image |
1331 | * will be snapshot. After that call, the end image will be recorded |
1332 | * until the second call to [method@Gtk.Snapshot.pop]. |
1333 | * |
1334 | * Calling this function requires two subsequent calls |
1335 | * to [method@Gtk.Snapshot.pop]. |
1336 | */ |
1337 | void |
1338 | gtk_snapshot_push_cross_fade (GtkSnapshot *snapshot, |
1339 | double progress) |
1340 | { |
1341 | const GtkSnapshotState *current_state = gtk_snapshot_get_current_state (snapshot); |
1342 | GtkSnapshotState *end_state; |
1343 | |
1344 | end_state = gtk_snapshot_push_state (snapshot, |
1345 | transform: current_state->transform, |
1346 | collect_func: gtk_snapshot_collect_cross_fade_end, |
1347 | clear_func: gtk_snapshot_clear_cross_fade_end); |
1348 | end_state->data.cross_fade.progress = progress; |
1349 | |
1350 | gtk_snapshot_push_state (snapshot, |
1351 | transform: end_state->transform, |
1352 | collect_func: gtk_snapshot_collect_cross_fade_start, |
1353 | NULL); |
1354 | } |
1355 | |
1356 | static GskRenderNode * |
1357 | gtk_snapshot_pop_one (GtkSnapshot *snapshot) |
1358 | { |
1359 | GtkSnapshotState *state; |
1360 | guint state_index; |
1361 | GskRenderNode *node; |
1362 | |
1363 | if (gtk_snapshot_states_is_empty (self: &snapshot->state_stack)) |
1364 | { |
1365 | g_warning ("Too many gtk_snapshot_pop() calls." ); |
1366 | return NULL; |
1367 | } |
1368 | |
1369 | state = gtk_snapshot_get_current_state (snapshot); |
1370 | state_index = gtk_snapshot_states_get_size (self: &snapshot->state_stack) - 1; |
1371 | |
1372 | if (state->collect_func) |
1373 | { |
1374 | node = state->collect_func (snapshot, |
1375 | state, |
1376 | (GskRenderNode **) gtk_snapshot_nodes_index (self: &snapshot->nodes, pos: state->start_node_index), |
1377 | state->n_nodes); |
1378 | |
1379 | /* The collect func may not modify the state stack... */ |
1380 | g_assert (state_index == gtk_snapshot_states_get_size (&snapshot->state_stack) - 1); |
1381 | |
1382 | /* Remove all the state's nodes from the list of nodes */ |
1383 | g_assert (state->start_node_index + state->n_nodes == gtk_snapshot_nodes_get_size (&snapshot->nodes)); |
1384 | gtk_snapshot_nodes_splice (self: &snapshot->nodes, pos: state->start_node_index, removed: state->n_nodes, FALSE, NULL, added: 0); |
1385 | } |
1386 | else |
1387 | { |
1388 | GtkSnapshotState *previous_state; |
1389 | |
1390 | node = NULL; |
1391 | |
1392 | /* move the nodes to the parent */ |
1393 | previous_state = gtk_snapshot_get_previous_state (snapshot); |
1394 | previous_state->n_nodes += state->n_nodes; |
1395 | g_assert (previous_state->start_node_index + previous_state->n_nodes == gtk_snapshot_nodes_get_size (&snapshot->nodes)); |
1396 | } |
1397 | |
1398 | gtk_snapshot_states_splice (self: &snapshot->state_stack, pos: state_index, removed: 1, FALSE, NULL, added: 0); |
1399 | |
1400 | return node; |
1401 | } |
1402 | |
1403 | static void |
1404 | gtk_snapshot_append_node_internal (GtkSnapshot *snapshot, |
1405 | GskRenderNode *node) |
1406 | { |
1407 | GtkSnapshotState *current_state; |
1408 | |
1409 | current_state = gtk_snapshot_get_current_state (snapshot); |
1410 | |
1411 | if (current_state) |
1412 | { |
1413 | gtk_snapshot_nodes_append (self: &snapshot->nodes, value: node); |
1414 | current_state->n_nodes ++; |
1415 | } |
1416 | else |
1417 | { |
1418 | g_critical ("Tried appending a node to an already finished snapshot." ); |
1419 | } |
1420 | } |
1421 | |
1422 | static GskRenderNode * |
1423 | gtk_snapshot_pop_internal (GtkSnapshot *snapshot, |
1424 | gboolean is_texture_pop) |
1425 | { |
1426 | GtkSnapshotState *state; |
1427 | GskRenderNode *node; |
1428 | guint forgotten_restores = 0; |
1429 | |
1430 | for (state = gtk_snapshot_get_current_state (snapshot); |
1431 | gtk_snapshot_state_should_autopop (state) || |
1432 | state->collect_func == NULL; |
1433 | state = gtk_snapshot_get_current_state (snapshot)) |
1434 | { |
1435 | if (state->collect_func == NULL) |
1436 | forgotten_restores++; |
1437 | |
1438 | node = gtk_snapshot_pop_one (snapshot); |
1439 | if (node) |
1440 | gtk_snapshot_append_node_internal (snapshot, node); |
1441 | } |
1442 | |
1443 | if (forgotten_restores) |
1444 | { |
1445 | g_warning ("Too many gtk_snapshot_save() calls. %u saves remaining." , forgotten_restores); |
1446 | } |
1447 | |
1448 | if (is_texture_pop && (state->collect_func != gtk_snapshot_collect_gl_shader_texture)) |
1449 | { |
1450 | g_critical ("Unexpected call to gtk_snapshot_gl_shader_pop_texture()." ); |
1451 | return NULL; |
1452 | } |
1453 | else if (!is_texture_pop && (state->collect_func == gtk_snapshot_collect_gl_shader_texture)) |
1454 | { |
1455 | g_critical ("Expected a call to gtk_snapshot_gl_shader_pop_texture()." ); |
1456 | return NULL; |
1457 | } |
1458 | |
1459 | return gtk_snapshot_pop_one (snapshot); |
1460 | } |
1461 | |
1462 | /** |
1463 | * gtk_snapshot_push_collect: |
1464 | * |
1465 | * Private. |
1466 | * |
1467 | * Pushes state so a later pop_collect call can collect all nodes |
1468 | * appended until that point. |
1469 | */ |
1470 | void |
1471 | gtk_snapshot_push_collect (GtkSnapshot *snapshot) |
1472 | { |
1473 | gtk_snapshot_push_state (snapshot, |
1474 | NULL, |
1475 | collect_func: gtk_snapshot_collect_default, |
1476 | NULL); |
1477 | } |
1478 | |
1479 | GskRenderNode * |
1480 | gtk_snapshot_pop_collect (GtkSnapshot *snapshot) |
1481 | { |
1482 | GskRenderNode *result = gtk_snapshot_pop_internal (snapshot, FALSE); |
1483 | |
1484 | return result; |
1485 | } |
1486 | |
1487 | /** |
1488 | * gtk_snapshot_to_node: |
1489 | * @snapshot: a `GtkSnapshot` |
1490 | * |
1491 | * Returns the render node that was constructed |
1492 | * by @snapshot. |
1493 | * |
1494 | * After calling this function, it is no longer possible to |
1495 | * add more nodes to @snapshot. The only function that should |
1496 | * be called after this is [method@GObject.Object.unref]. |
1497 | * |
1498 | * Returns: (transfer full) (nullable): the constructed `GskRenderNode` |
1499 | */ |
1500 | GskRenderNode * |
1501 | gtk_snapshot_to_node (GtkSnapshot *snapshot) |
1502 | { |
1503 | GskRenderNode *result; |
1504 | |
1505 | result = gtk_snapshot_pop_internal (snapshot, FALSE); |
1506 | |
1507 | /* We should have exactly our initial state */ |
1508 | if (!gtk_snapshot_states_is_empty (self: &snapshot->state_stack)) |
1509 | { |
1510 | g_warning ("Too many gtk_snapshot_push() calls. %zu states remaining." , |
1511 | gtk_snapshot_states_get_size (&snapshot->state_stack)); |
1512 | } |
1513 | |
1514 | gtk_snapshot_states_clear (self: &snapshot->state_stack); |
1515 | gtk_snapshot_nodes_clear (self: &snapshot->nodes); |
1516 | |
1517 | return result; |
1518 | } |
1519 | |
1520 | /** |
1521 | * gtk_snapshot_to_paintable: |
1522 | * @snapshot: a `GtkSnapshot` |
1523 | * @size: (nullable): The size of the resulting paintable |
1524 | * or %NULL to use the bounds of the snapshot |
1525 | * |
1526 | * Returns a paintable encapsulating the render node |
1527 | * that was constructed by @snapshot. |
1528 | * |
1529 | * After calling this function, it is no longer possible to |
1530 | * add more nodes to @snapshot. The only function that should |
1531 | * be called after this is [method@GObject.Object.unref]. |
1532 | * |
1533 | * Returns: (transfer full) (nullable): a new `GdkPaintable` |
1534 | */ |
1535 | GdkPaintable * |
1536 | gtk_snapshot_to_paintable (GtkSnapshot *snapshot, |
1537 | const graphene_size_t *size) |
1538 | { |
1539 | GskRenderNode *node; |
1540 | GdkPaintable *paintable; |
1541 | graphene_rect_t bounds; |
1542 | |
1543 | node = gtk_snapshot_to_node (snapshot); |
1544 | if (size) |
1545 | { |
1546 | graphene_size_init_from_size (s: &bounds.size, src: size); |
1547 | } |
1548 | else |
1549 | { |
1550 | gsk_render_node_get_bounds (node, bounds: &bounds); |
1551 | bounds.size.width += bounds.origin.x; |
1552 | bounds.size.height += bounds.origin.y; |
1553 | } |
1554 | bounds.origin.x = 0; |
1555 | bounds.origin.y = 0; |
1556 | |
1557 | paintable = gtk_render_node_paintable_new (node, bounds: &bounds); |
1558 | gsk_render_node_unref (node); |
1559 | |
1560 | return paintable; |
1561 | } |
1562 | |
1563 | /** |
1564 | * gtk_snapshot_pop: |
1565 | * @snapshot: a `GtkSnapshot` |
1566 | * |
1567 | * Removes the top element from the stack of render nodes, |
1568 | * and appends it to the node underneath it. |
1569 | */ |
1570 | void |
1571 | gtk_snapshot_pop (GtkSnapshot *snapshot) |
1572 | { |
1573 | GskRenderNode *node; |
1574 | |
1575 | node = gtk_snapshot_pop_internal (snapshot, FALSE); |
1576 | |
1577 | if (node) |
1578 | gtk_snapshot_append_node_internal (snapshot, node); |
1579 | } |
1580 | |
1581 | /** |
1582 | * gtk_snapshot_gl_shader_pop_texture: |
1583 | * @snapshot: a `GtkSnapshot` |
1584 | * |
1585 | * Removes the top element from the stack of render nodes and |
1586 | * adds it to the nearest [class@Gsk.GLShaderNode] below it. |
1587 | * |
1588 | * This must be called the same number of times as the number |
1589 | * of textures is needed for the shader in |
1590 | * [method@Gtk.Snapshot.push_gl_shader]. |
1591 | */ |
1592 | void |
1593 | gtk_snapshot_gl_shader_pop_texture (GtkSnapshot *snapshot) |
1594 | { |
1595 | G_GNUC_UNUSED GskRenderNode *node; |
1596 | |
1597 | node = gtk_snapshot_pop_internal (snapshot, TRUE); |
1598 | g_assert (node == NULL); |
1599 | } |
1600 | |
1601 | |
1602 | /** |
1603 | * gtk_snapshot_save: |
1604 | * @snapshot: a `GtkSnapshot` |
1605 | * |
1606 | * Makes a copy of the current state of @snapshot and saves it |
1607 | * on an internal stack. |
1608 | * |
1609 | * When [method@Gtk.Snapshot.restore] is called, @snapshot will |
1610 | * be restored to the saved state. Multiple calls to |
1611 | * [method@Snapshot.save] and [class@Snapshot.restore] can be nested; |
1612 | * each call to `gtk_snapshot_restore()` restores the state from |
1613 | * the matching paired `gtk_snapshot_save()`. |
1614 | * |
1615 | * It is necessary to clear all saved states with corresponding |
1616 | * calls to `gtk_snapshot_restore()`. |
1617 | */ |
1618 | void |
1619 | gtk_snapshot_save (GtkSnapshot *snapshot) |
1620 | { |
1621 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1622 | |
1623 | gtk_snapshot_push_state (snapshot, |
1624 | transform: gtk_snapshot_get_current_state (snapshot)->transform, |
1625 | NULL, |
1626 | NULL); |
1627 | } |
1628 | |
1629 | /** |
1630 | * gtk_snapshot_restore: |
1631 | * @snapshot: a `GtkSnapshot` |
1632 | * |
1633 | * Restores @snapshot to the state saved by a preceding call to |
1634 | * [method@Snapshot.save] and removes that state from the stack of |
1635 | * saved states. |
1636 | */ |
1637 | void |
1638 | gtk_snapshot_restore (GtkSnapshot *snapshot) |
1639 | { |
1640 | GtkSnapshotState *state; |
1641 | GskRenderNode *node; |
1642 | |
1643 | for (state = gtk_snapshot_get_current_state (snapshot); |
1644 | gtk_snapshot_state_should_autopop (state); |
1645 | state = gtk_snapshot_get_current_state (snapshot)) |
1646 | { |
1647 | node = gtk_snapshot_pop_one (snapshot); |
1648 | if (node) |
1649 | gtk_snapshot_append_node_internal (snapshot, node); |
1650 | } |
1651 | |
1652 | if (state->collect_func != NULL) |
1653 | { |
1654 | g_warning ("Too many gtk_snapshot_restore() calls." ); |
1655 | return; |
1656 | } |
1657 | |
1658 | node = gtk_snapshot_pop_one (snapshot); |
1659 | g_assert (node == NULL); |
1660 | } |
1661 | |
1662 | /** |
1663 | * gtk_snapshot_transform: |
1664 | * @snapshot: a `GtkSnapshot` |
1665 | * @transform: (nullable): the transform to apply |
1666 | * |
1667 | * Transforms @snapshot's coordinate system with the given @transform. |
1668 | */ |
1669 | void |
1670 | gtk_snapshot_transform (GtkSnapshot *snapshot, |
1671 | GskTransform *transform) |
1672 | { |
1673 | GtkSnapshotState *state; |
1674 | |
1675 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1676 | |
1677 | state = gtk_snapshot_get_current_state (snapshot); |
1678 | state->transform = gsk_transform_transform (next: state->transform, other: transform); |
1679 | } |
1680 | |
1681 | /** |
1682 | * gtk_snapshot_transform_matrix: |
1683 | * @snapshot: a `GtkSnapshot` |
1684 | * @matrix: the matrix to multiply the transform with |
1685 | * |
1686 | * Transforms @snapshot's coordinate system with the given @matrix. |
1687 | */ |
1688 | void |
1689 | gtk_snapshot_transform_matrix (GtkSnapshot *snapshot, |
1690 | const graphene_matrix_t *matrix) |
1691 | { |
1692 | GtkSnapshotState *state; |
1693 | |
1694 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1695 | g_return_if_fail (matrix != NULL); |
1696 | |
1697 | state = gtk_snapshot_get_current_state (snapshot); |
1698 | state->transform = gsk_transform_matrix (next: state->transform, matrix); |
1699 | } |
1700 | |
1701 | /** |
1702 | * gtk_snapshot_translate: |
1703 | * @snapshot: a `GtkSnapshot` |
1704 | * @point: the point to translate the snapshot by |
1705 | * |
1706 | * Translates @snapshot's coordinate system by @point in 2-dimensional space. |
1707 | */ |
1708 | void |
1709 | gtk_snapshot_translate (GtkSnapshot *snapshot, |
1710 | const graphene_point_t *point) |
1711 | { |
1712 | GtkSnapshotState *state; |
1713 | |
1714 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1715 | g_return_if_fail (point != NULL); |
1716 | |
1717 | state = gtk_snapshot_get_current_state (snapshot); |
1718 | state->transform = gsk_transform_translate (next: state->transform, point); |
1719 | } |
1720 | |
1721 | /** |
1722 | * gtk_snapshot_translate_3d: |
1723 | * @snapshot: a `GtkSnapshot` |
1724 | * @point: the point to translate the snapshot by |
1725 | * |
1726 | * Translates @snapshot's coordinate system by @point. |
1727 | */ |
1728 | void |
1729 | gtk_snapshot_translate_3d (GtkSnapshot *snapshot, |
1730 | const graphene_point3d_t *point) |
1731 | { |
1732 | GtkSnapshotState *state; |
1733 | |
1734 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1735 | g_return_if_fail (point != NULL); |
1736 | |
1737 | state = gtk_snapshot_get_current_state (snapshot); |
1738 | state->transform = gsk_transform_translate_3d (next: state->transform, point); |
1739 | } |
1740 | |
1741 | /** |
1742 | * gtk_snapshot_rotate: |
1743 | * @snapshot: a `GtkSnapshot` |
1744 | * @angle: the rotation angle, in degrees (clockwise) |
1745 | * |
1746 | * Rotates @@snapshot's coordinate system by @angle degrees in 2D space - |
1747 | * or in 3D speak, rotates around the Z axis. |
1748 | * |
1749 | * To rotate around other axes, use [method@Gsk.Transform.rotate_3d]. |
1750 | */ |
1751 | void |
1752 | gtk_snapshot_rotate (GtkSnapshot *snapshot, |
1753 | float angle) |
1754 | { |
1755 | GtkSnapshotState *state; |
1756 | |
1757 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1758 | |
1759 | state = gtk_snapshot_get_current_state (snapshot); |
1760 | state->transform = gsk_transform_rotate (next: state->transform, angle); |
1761 | } |
1762 | |
1763 | /** |
1764 | * gtk_snapshot_rotate_3d: |
1765 | * @snapshot: a `GtkSnapshot` |
1766 | * @angle: the rotation angle, in degrees (clockwise) |
1767 | * @axis: The rotation axis |
1768 | * |
1769 | * Rotates @snapshot's coordinate system by @angle degrees around @axis. |
1770 | * |
1771 | * For a rotation in 2D space, use [method@Gsk.Transform.rotate]. |
1772 | */ |
1773 | void |
1774 | gtk_snapshot_rotate_3d (GtkSnapshot *snapshot, |
1775 | float angle, |
1776 | const graphene_vec3_t *axis) |
1777 | { |
1778 | GtkSnapshotState *state; |
1779 | |
1780 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1781 | g_return_if_fail (axis != NULL); |
1782 | |
1783 | state = gtk_snapshot_get_current_state (snapshot); |
1784 | state->transform = gsk_transform_rotate_3d (next: state->transform, angle, axis); |
1785 | } |
1786 | |
1787 | /** |
1788 | * gtk_snapshot_scale: |
1789 | * @snapshot: a `GtkSnapshot` |
1790 | * @factor_x: scaling factor on the X axis |
1791 | * @factor_y: scaling factor on the Y axis |
1792 | * |
1793 | * Scales @snapshot's coordinate system in 2-dimensional space by |
1794 | * the given factors. |
1795 | * |
1796 | * Use [method@Gtk.Snapshot.scale_3d] to scale in all 3 dimensions. |
1797 | */ |
1798 | void |
1799 | gtk_snapshot_scale (GtkSnapshot *snapshot, |
1800 | float factor_x, |
1801 | float factor_y) |
1802 | { |
1803 | GtkSnapshotState *state; |
1804 | |
1805 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1806 | |
1807 | state = gtk_snapshot_get_current_state (snapshot); |
1808 | state->transform = gsk_transform_scale (next: state->transform, factor_x, factor_y); |
1809 | } |
1810 | |
1811 | /** |
1812 | * gtk_snapshot_scale_3d: |
1813 | * @snapshot: a `GtkSnapshot` |
1814 | * @factor_x: scaling factor on the X axis |
1815 | * @factor_y: scaling factor on the Y axis |
1816 | * @factor_z: scaling factor on the Z axis |
1817 | * |
1818 | * Scales @snapshot's coordinate system by the given factors. |
1819 | */ |
1820 | void |
1821 | gtk_snapshot_scale_3d (GtkSnapshot *snapshot, |
1822 | float factor_x, |
1823 | float factor_y, |
1824 | float factor_z) |
1825 | { |
1826 | GtkSnapshotState *state; |
1827 | |
1828 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1829 | |
1830 | state = gtk_snapshot_get_current_state (snapshot); |
1831 | state->transform = gsk_transform_scale_3d (next: state->transform, factor_x, factor_y, factor_z); |
1832 | } |
1833 | |
1834 | /** |
1835 | * gtk_snapshot_perspective: |
1836 | * @snapshot: a `GtkSnapshot` |
1837 | * @depth: distance of the z=0 plane |
1838 | * |
1839 | * Applies a perspective projection transform. |
1840 | * |
1841 | * See [method@Gsk.Transform.perspective] for a discussion on the details. |
1842 | */ |
1843 | void |
1844 | gtk_snapshot_perspective (GtkSnapshot *snapshot, |
1845 | float depth) |
1846 | { |
1847 | GtkSnapshotState *state; |
1848 | |
1849 | g_return_if_fail (GTK_IS_SNAPSHOT (snapshot)); |
1850 | |
1851 | state = gtk_snapshot_get_current_state (snapshot); |
1852 | state->transform = gsk_transform_perspective (next: state->transform, depth); |
1853 | } |
1854 | |
1855 | /** |
1856 | * gtk_snapshot_append_node: |
1857 | * @snapshot: a `GtkSnapshot` |
1858 | * @node: a `GskRenderNode` |
1859 | * |
1860 | * Appends @node to the current render node of @snapshot, |
1861 | * without changing the current node. |
1862 | * |
1863 | * If @snapshot does not have a current node yet, @node |
1864 | * will become the initial node. |
1865 | */ |
1866 | void |
1867 | gtk_snapshot_append_node (GtkSnapshot *snapshot, |
1868 | GskRenderNode *node) |
1869 | { |
1870 | g_return_if_fail (snapshot != NULL); |
1871 | g_return_if_fail (GSK_IS_RENDER_NODE (node)); |
1872 | |
1873 | gtk_snapshot_ensure_identity (snapshot); |
1874 | |
1875 | gtk_snapshot_append_node_internal (snapshot, node: gsk_render_node_ref (node)); |
1876 | } |
1877 | |
1878 | /** |
1879 | * gtk_snapshot_append_cairo: |
1880 | * @snapshot: a `GtkSnapshot` |
1881 | * @bounds: the bounds for the new node |
1882 | * |
1883 | * Creates a new [class@Gsk.CairoNode] and appends it to the current |
1884 | * render node of @snapshot, without changing the current node. |
1885 | * |
1886 | * Returns: a `cairo_t` suitable for drawing the contents of |
1887 | * the newly created render node |
1888 | */ |
1889 | cairo_t * |
1890 | gtk_snapshot_append_cairo (GtkSnapshot *snapshot, |
1891 | const graphene_rect_t *bounds) |
1892 | { |
1893 | GskRenderNode *node; |
1894 | graphene_rect_t real_bounds; |
1895 | float scale_x, scale_y, dx, dy; |
1896 | cairo_t *cr; |
1897 | |
1898 | g_return_val_if_fail (snapshot != NULL, NULL); |
1899 | g_return_val_if_fail (bounds != NULL, NULL); |
1900 | |
1901 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
1902 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &real_bounds); |
1903 | |
1904 | node = gsk_cairo_node_new (bounds: &real_bounds); |
1905 | |
1906 | gtk_snapshot_append_node_internal (snapshot, node); |
1907 | |
1908 | cr = gsk_cairo_node_get_draw_context (node); |
1909 | |
1910 | cairo_scale (cr, sx: scale_x, sy: scale_y); |
1911 | cairo_translate (cr, tx: dx, ty: dy); |
1912 | |
1913 | return cr; |
1914 | } |
1915 | |
1916 | /** |
1917 | * gtk_snapshot_append_texture: |
1918 | * @snapshot: a `GtkSnapshot` |
1919 | * @texture: the texture to render |
1920 | * @bounds: the bounds for the new node |
1921 | * |
1922 | * Creates a new render node drawing the @texture |
1923 | * into the given @bounds and appends it to the |
1924 | * current render node of @snapshot. |
1925 | */ |
1926 | void |
1927 | gtk_snapshot_append_texture (GtkSnapshot *snapshot, |
1928 | GdkTexture *texture, |
1929 | const graphene_rect_t *bounds) |
1930 | { |
1931 | GskRenderNode *node; |
1932 | graphene_rect_t real_bounds; |
1933 | float scale_x, scale_y, dx, dy; |
1934 | |
1935 | g_return_if_fail (snapshot != NULL); |
1936 | g_return_if_fail (GDK_IS_TEXTURE (texture)); |
1937 | g_return_if_fail (bounds != NULL); |
1938 | |
1939 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
1940 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &real_bounds); |
1941 | node = gsk_texture_node_new (texture, bounds: &real_bounds); |
1942 | |
1943 | gtk_snapshot_append_node_internal (snapshot, node); |
1944 | } |
1945 | |
1946 | /** |
1947 | * gtk_snapshot_append_color: |
1948 | * @snapshot: a `GtkSnapshot` |
1949 | * @color: the color to draw |
1950 | * @bounds: the bounds for the new node |
1951 | * |
1952 | * Creates a new render node drawing the @color into the |
1953 | * given @bounds and appends it to the current render node |
1954 | * of @snapshot. |
1955 | * |
1956 | * You should try to avoid calling this function if |
1957 | * @color is transparent. |
1958 | */ |
1959 | void |
1960 | gtk_snapshot_append_color (GtkSnapshot *snapshot, |
1961 | const GdkRGBA *color, |
1962 | const graphene_rect_t *bounds) |
1963 | { |
1964 | GskRenderNode *node; |
1965 | graphene_rect_t real_bounds; |
1966 | float scale_x, scale_y, dx, dy; |
1967 | |
1968 | g_return_if_fail (snapshot != NULL); |
1969 | g_return_if_fail (color != NULL); |
1970 | g_return_if_fail (bounds != NULL); |
1971 | |
1972 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
1973 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &real_bounds); |
1974 | |
1975 | node = gsk_color_node_new (rgba: color, bounds: &real_bounds); |
1976 | |
1977 | gtk_snapshot_append_node_internal (snapshot, node); |
1978 | } |
1979 | |
1980 | /** |
1981 | * gtk_snapshot_render_background: |
1982 | * @snapshot: a `GtkSnapshot` |
1983 | * @context: the style context that defines the background |
1984 | * @x: X origin of the rectangle |
1985 | * @y: Y origin of the rectangle |
1986 | * @width: rectangle width |
1987 | * @height: rectangle height |
1988 | * |
1989 | * Creates a render node for the CSS background according to @context, |
1990 | * and appends it to the current node of @snapshot, without changing |
1991 | * the current node. |
1992 | */ |
1993 | void |
1994 | gtk_snapshot_render_background (GtkSnapshot *snapshot, |
1995 | GtkStyleContext *context, |
1996 | double x, |
1997 | double y, |
1998 | double width, |
1999 | double height) |
2000 | { |
2001 | GtkCssBoxes boxes; |
2002 | |
2003 | g_return_if_fail (snapshot != NULL); |
2004 | g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); |
2005 | |
2006 | gtk_css_boxes_init_border_box (boxes: &boxes, |
2007 | style: gtk_style_context_lookup_style (context), |
2008 | x, y, width, height); |
2009 | gtk_css_style_snapshot_background (boxes: &boxes, snapshot); |
2010 | } |
2011 | |
2012 | /** |
2013 | * gtk_snapshot_render_frame: |
2014 | * @snapshot: a `GtkSnapshot` |
2015 | * @context: the style context that defines the frame |
2016 | * @x: X origin of the rectangle |
2017 | * @y: Y origin of the rectangle |
2018 | * @width: rectangle width |
2019 | * @height: rectangle height |
2020 | * |
2021 | * Creates a render node for the CSS border according to @context, |
2022 | * and appends it to the current node of @snapshot, without changing |
2023 | * the current node. |
2024 | */ |
2025 | void |
2026 | gtk_snapshot_render_frame (GtkSnapshot *snapshot, |
2027 | GtkStyleContext *context, |
2028 | double x, |
2029 | double y, |
2030 | double width, |
2031 | double height) |
2032 | { |
2033 | GtkCssBoxes boxes; |
2034 | |
2035 | g_return_if_fail (snapshot != NULL); |
2036 | g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); |
2037 | |
2038 | gtk_css_boxes_init_border_box (boxes: &boxes, |
2039 | style: gtk_style_context_lookup_style (context), |
2040 | x, y, width, height); |
2041 | gtk_css_style_snapshot_border (boxes: &boxes, snapshot); |
2042 | } |
2043 | |
2044 | /** |
2045 | * gtk_snapshot_render_focus: |
2046 | * @snapshot: a `GtkSnapshot` |
2047 | * @context: the style context that defines the focus ring |
2048 | * @x: X origin of the rectangle |
2049 | * @y: Y origin of the rectangle |
2050 | * @width: rectangle width |
2051 | * @height: rectangle height |
2052 | * |
2053 | * Creates a render node for the focus outline according to @context, |
2054 | * and appends it to the current node of @snapshot, without changing |
2055 | * the current node. |
2056 | */ |
2057 | void |
2058 | gtk_snapshot_render_focus (GtkSnapshot *snapshot, |
2059 | GtkStyleContext *context, |
2060 | double x, |
2061 | double y, |
2062 | double width, |
2063 | double height) |
2064 | { |
2065 | GtkCssBoxes boxes; |
2066 | |
2067 | g_return_if_fail (snapshot != NULL); |
2068 | g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); |
2069 | |
2070 | gtk_css_boxes_init_border_box (boxes: &boxes, |
2071 | style: gtk_style_context_lookup_style (context), |
2072 | x, y, width, height); |
2073 | gtk_css_style_snapshot_outline (boxes: &boxes, snapshot); |
2074 | } |
2075 | |
2076 | /** |
2077 | * gtk_snapshot_render_layout: |
2078 | * @snapshot: a `GtkSnapshot` |
2079 | * @context: the style context that defines the text |
2080 | * @x: X origin of the rectangle |
2081 | * @y: Y origin of the rectangle |
2082 | * @layout: the `PangoLayout` to render |
2083 | * |
2084 | * Creates a render node for rendering @layout according to the style |
2085 | * information in @context, and appends it to the current node of @snapshot, |
2086 | * without changing the current node. |
2087 | */ |
2088 | void |
2089 | gtk_snapshot_render_layout (GtkSnapshot *snapshot, |
2090 | GtkStyleContext *context, |
2091 | double x, |
2092 | double y, |
2093 | PangoLayout *layout) |
2094 | { |
2095 | const bool needs_translate = (x != 0 || y != 0); |
2096 | const GdkRGBA *fg_color; |
2097 | GtkCssValue *shadows_value; |
2098 | gboolean has_shadow; |
2099 | |
2100 | g_return_if_fail (snapshot != NULL); |
2101 | g_return_if_fail (GTK_IS_STYLE_CONTEXT (context)); |
2102 | g_return_if_fail (PANGO_IS_LAYOUT (layout)); |
2103 | |
2104 | if (needs_translate) |
2105 | { |
2106 | gtk_snapshot_save (snapshot); |
2107 | gtk_snapshot_translate (snapshot, point: &GRAPHENE_POINT_INIT (x, y)); |
2108 | } |
2109 | |
2110 | fg_color = gtk_css_color_value_get_rgba (color: _gtk_style_context_peek_property (context, property_id: GTK_CSS_PROPERTY_COLOR)); |
2111 | |
2112 | shadows_value = _gtk_style_context_peek_property (context, property_id: GTK_CSS_PROPERTY_TEXT_SHADOW); |
2113 | has_shadow = gtk_css_shadow_value_push_snapshot (value: shadows_value, snapshot); |
2114 | |
2115 | gtk_snapshot_append_layout (snapshot, layout, color: fg_color); |
2116 | |
2117 | if (has_shadow) |
2118 | gtk_snapshot_pop (snapshot); |
2119 | |
2120 | if (needs_translate) |
2121 | gtk_snapshot_restore (snapshot); |
2122 | } |
2123 | |
2124 | void |
2125 | gtk_snapshot_append_text (GtkSnapshot *snapshot, |
2126 | PangoFont *font, |
2127 | PangoGlyphString *glyphs, |
2128 | const GdkRGBA *color, |
2129 | float x, |
2130 | float y) |
2131 | { |
2132 | GskRenderNode *node; |
2133 | float dx, dy; |
2134 | |
2135 | gtk_snapshot_ensure_translate (snapshot, dx: &dx, dy: &dy); |
2136 | |
2137 | node = gsk_text_node_new (font, |
2138 | glyphs, |
2139 | color, |
2140 | offset: &GRAPHENE_POINT_INIT (x + dx, y + dy)); |
2141 | if (node == NULL) |
2142 | return; |
2143 | |
2144 | gtk_snapshot_append_node_internal (snapshot, node); |
2145 | } |
2146 | |
2147 | /** |
2148 | * gtk_snapshot_append_linear_gradient: |
2149 | * @snapshot: a `GtkSnapshot` |
2150 | * @bounds: the rectangle to render the linear gradient into |
2151 | * @start_point: the point at which the linear gradient will begin |
2152 | * @end_point: the point at which the linear gradient will finish |
2153 | * @stops: (array length=n_stops): the color stops defining the gradient |
2154 | * @n_stops: the number of elements in @stops |
2155 | * |
2156 | * Appends a linear gradient node with the given stops to @snapshot. |
2157 | */ |
2158 | void |
2159 | gtk_snapshot_append_linear_gradient (GtkSnapshot *snapshot, |
2160 | const graphene_rect_t *bounds, |
2161 | const graphene_point_t *start_point, |
2162 | const graphene_point_t *end_point, |
2163 | const GskColorStop *stops, |
2164 | gsize n_stops) |
2165 | { |
2166 | GskRenderNode *node; |
2167 | graphene_rect_t real_bounds; |
2168 | float scale_x, scale_y, dx, dy; |
2169 | const GdkRGBA *first_color; |
2170 | gboolean need_gradient = FALSE; |
2171 | |
2172 | g_return_if_fail (snapshot != NULL); |
2173 | g_return_if_fail (start_point != NULL); |
2174 | g_return_if_fail (end_point != NULL); |
2175 | g_return_if_fail (stops != NULL); |
2176 | g_return_if_fail (n_stops > 1); |
2177 | |
2178 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
2179 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &real_bounds); |
2180 | |
2181 | first_color = &stops[0].color; |
2182 | for (gsize i = 0; i < n_stops; i ++) |
2183 | { |
2184 | if (!gdk_rgba_equal (p1: first_color, p2: &stops[i].color)) |
2185 | { |
2186 | need_gradient = TRUE; |
2187 | break; |
2188 | } |
2189 | } |
2190 | |
2191 | if (need_gradient) |
2192 | { |
2193 | graphene_point_t real_start_point, real_end_point; |
2194 | |
2195 | real_start_point.x = scale_x * start_point->x + dx; |
2196 | real_start_point.y = scale_y * start_point->y + dy; |
2197 | real_end_point.x = scale_x * end_point->x + dx; |
2198 | real_end_point.y = scale_y * end_point->y + dy; |
2199 | |
2200 | node = gsk_linear_gradient_node_new (bounds: &real_bounds, |
2201 | start: &real_start_point, |
2202 | end: &real_end_point, |
2203 | color_stops: stops, |
2204 | n_color_stops: n_stops); |
2205 | } |
2206 | else |
2207 | { |
2208 | node = gsk_color_node_new (rgba: first_color, bounds: &real_bounds); |
2209 | } |
2210 | |
2211 | gtk_snapshot_append_node_internal (snapshot, node); |
2212 | } |
2213 | |
2214 | /** |
2215 | * gtk_snapshot_append_repeating_linear_gradient: |
2216 | * @snapshot: a `GtkSnapshot` |
2217 | * @bounds: the rectangle to render the linear gradient into |
2218 | * @start_point: the point at which the linear gradient will begin |
2219 | * @end_point: the point at which the linear gradient will finish |
2220 | * @stops: (array length=n_stops): the color stops defining the gradient |
2221 | * @n_stops: the number of elements in @stops |
2222 | * |
2223 | * Appends a repeating linear gradient node with the given stops to @snapshot. |
2224 | */ |
2225 | void |
2226 | gtk_snapshot_append_repeating_linear_gradient (GtkSnapshot *snapshot, |
2227 | const graphene_rect_t *bounds, |
2228 | const graphene_point_t *start_point, |
2229 | const graphene_point_t *end_point, |
2230 | const GskColorStop *stops, |
2231 | gsize n_stops) |
2232 | { |
2233 | GskRenderNode *node; |
2234 | graphene_rect_t real_bounds; |
2235 | float scale_x, scale_y, dx, dy; |
2236 | gboolean need_gradient = FALSE; |
2237 | const GdkRGBA *first_color; |
2238 | |
2239 | g_return_if_fail (snapshot != NULL); |
2240 | g_return_if_fail (start_point != NULL); |
2241 | g_return_if_fail (end_point != NULL); |
2242 | g_return_if_fail (stops != NULL); |
2243 | g_return_if_fail (n_stops > 1); |
2244 | |
2245 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
2246 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &real_bounds); |
2247 | |
2248 | first_color = &stops[0].color; |
2249 | for (gsize i = 0; i < n_stops; i ++) |
2250 | { |
2251 | if (!gdk_rgba_equal (p1: first_color, p2: &stops[i].color)) |
2252 | { |
2253 | need_gradient = TRUE; |
2254 | break; |
2255 | } |
2256 | } |
2257 | |
2258 | if (need_gradient) |
2259 | { |
2260 | graphene_point_t real_start_point, real_end_point; |
2261 | |
2262 | real_start_point.x = scale_x * start_point->x + dx; |
2263 | real_start_point.y = scale_y * start_point->y + dy; |
2264 | real_end_point.x = scale_x * end_point->x + dx; |
2265 | real_end_point.y = scale_y * end_point->y + dy; |
2266 | |
2267 | node = gsk_repeating_linear_gradient_node_new (bounds: &real_bounds, |
2268 | start: &real_start_point, |
2269 | end: &real_end_point, |
2270 | color_stops: stops, |
2271 | n_color_stops: n_stops); |
2272 | } |
2273 | else |
2274 | { |
2275 | node = gsk_color_node_new (rgba: first_color, bounds: &real_bounds); |
2276 | } |
2277 | |
2278 | gtk_snapshot_append_node_internal (snapshot, node); |
2279 | } |
2280 | |
2281 | /** |
2282 | * gtk_snapshot_append_conic_gradient: |
2283 | * @snapshot: a `GtkSnapshot` |
2284 | * @bounds: the rectangle to render the gradient into |
2285 | * @center: the center point of the conic gradient |
2286 | * @rotation: the clockwise rotation in degrees of the starting angle. |
2287 | * 0 means the starting angle is the top. |
2288 | * @stops: (array length=n_stops): the color stops defining the gradient |
2289 | * @n_stops: the number of elements in @stops |
2290 | * |
2291 | * Appends a conic gradient node with the given stops to @snapshot. |
2292 | */ |
2293 | void |
2294 | gtk_snapshot_append_conic_gradient (GtkSnapshot *snapshot, |
2295 | const graphene_rect_t *bounds, |
2296 | const graphene_point_t *center, |
2297 | float rotation, |
2298 | const GskColorStop *stops, |
2299 | gsize n_stops) |
2300 | { |
2301 | GskRenderNode *node; |
2302 | graphene_rect_t real_bounds; |
2303 | float dx, dy; |
2304 | const GdkRGBA *first_color; |
2305 | gboolean need_gradient = FALSE; |
2306 | int i; |
2307 | |
2308 | g_return_if_fail (snapshot != NULL); |
2309 | g_return_if_fail (center != NULL); |
2310 | g_return_if_fail (stops != NULL); |
2311 | g_return_if_fail (n_stops > 1); |
2312 | |
2313 | gtk_snapshot_ensure_translate (snapshot, dx: &dx, dy: &dy); |
2314 | graphene_rect_offset_r (r: bounds, d_x: dx, d_y: dy, res: &real_bounds); |
2315 | |
2316 | first_color = &stops[0].color; |
2317 | for (i = 0; i < n_stops; i ++) |
2318 | { |
2319 | if (!gdk_rgba_equal (p1: first_color, p2: &stops[i].color)) |
2320 | { |
2321 | need_gradient = TRUE; |
2322 | break; |
2323 | } |
2324 | } |
2325 | |
2326 | if (need_gradient) |
2327 | node = gsk_conic_gradient_node_new (bounds: &real_bounds, |
2328 | center: &GRAPHENE_POINT_INIT( |
2329 | center->x + dx, |
2330 | center->y + dy |
2331 | ), |
2332 | rotation, |
2333 | color_stops: stops, |
2334 | n_color_stops: n_stops); |
2335 | else |
2336 | node = gsk_color_node_new (rgba: first_color, bounds: &real_bounds); |
2337 | |
2338 | gtk_snapshot_append_node_internal (snapshot, node); |
2339 | } |
2340 | |
2341 | /** |
2342 | * gtk_snapshot_append_radial_gradient: |
2343 | * @snapshot: a `GtkSnapshot` |
2344 | * @bounds: the rectangle to render the readial gradient into |
2345 | * @center: the center point for the radial gradient |
2346 | * @hradius: the horizontal radius |
2347 | * @vradius: the vertical radius |
2348 | * @start: the start position (on the horizontal axis) |
2349 | * @end: the end position (on the horizontal axis) |
2350 | * @stops: (array length=n_stops): the color stops defining the gradient |
2351 | * @n_stops: the number of elements in @stops |
2352 | * |
2353 | * Appends a radial gradient node with the given stops to @snapshot. |
2354 | */ |
2355 | void |
2356 | gtk_snapshot_append_radial_gradient (GtkSnapshot *snapshot, |
2357 | const graphene_rect_t *bounds, |
2358 | const graphene_point_t *center, |
2359 | float hradius, |
2360 | float vradius, |
2361 | float start, |
2362 | float end, |
2363 | const GskColorStop *stops, |
2364 | gsize n_stops) |
2365 | { |
2366 | GskRenderNode *node; |
2367 | graphene_rect_t real_bounds; |
2368 | float scale_x, scale_y, dx, dy; |
2369 | gboolean need_gradient = FALSE; |
2370 | const GdkRGBA *first_color; |
2371 | |
2372 | g_return_if_fail (snapshot != NULL); |
2373 | g_return_if_fail (center != NULL); |
2374 | g_return_if_fail (stops != NULL); |
2375 | g_return_if_fail (n_stops > 1); |
2376 | |
2377 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
2378 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &real_bounds); |
2379 | |
2380 | first_color = &stops[0].color; |
2381 | for (gsize i = 0; i < n_stops; i ++) |
2382 | { |
2383 | if (!gdk_rgba_equal (p1: first_color, p2: &stops[i].color)) |
2384 | { |
2385 | need_gradient = TRUE; |
2386 | break; |
2387 | } |
2388 | } |
2389 | |
2390 | if (need_gradient) |
2391 | { |
2392 | graphene_point_t real_center; |
2393 | |
2394 | real_center.x = scale_x * center->x + dx; |
2395 | real_center.y = scale_y * center->y + dy; |
2396 | |
2397 | node = gsk_radial_gradient_node_new (bounds: &real_bounds, |
2398 | center: &real_center, |
2399 | hradius: hradius * scale_x, |
2400 | vradius: vradius * scale_y, |
2401 | start, |
2402 | end, |
2403 | color_stops: stops, |
2404 | n_color_stops: n_stops); |
2405 | } |
2406 | else |
2407 | { |
2408 | node = gsk_color_node_new (rgba: first_color, bounds: &real_bounds); |
2409 | } |
2410 | |
2411 | gtk_snapshot_append_node_internal (snapshot, node); |
2412 | } |
2413 | |
2414 | /** |
2415 | * gtk_snapshot_append_repeating_radial_gradient: |
2416 | * @snapshot: a `GtkSnapshot` |
2417 | * @bounds: the rectangle to render the readial gradient into |
2418 | * @center: the center point for the radial gradient |
2419 | * @hradius: the horizontal radius |
2420 | * @vradius: the vertical radius |
2421 | * @start: the start position (on the horizontal axis) |
2422 | * @end: the end position (on the horizontal axis) |
2423 | * @stops: (array length=n_stops): the color stops defining the gradient |
2424 | * @n_stops: the number of elements in @stops |
2425 | * |
2426 | * Appends a repeating radial gradient node with the given stops to @snapshot. |
2427 | */ |
2428 | void |
2429 | gtk_snapshot_append_repeating_radial_gradient (GtkSnapshot *snapshot, |
2430 | const graphene_rect_t *bounds, |
2431 | const graphene_point_t *center, |
2432 | float hradius, |
2433 | float vradius, |
2434 | float start, |
2435 | float end, |
2436 | const GskColorStop *stops, |
2437 | gsize n_stops) |
2438 | { |
2439 | GskRenderNode *node; |
2440 | graphene_rect_t real_bounds; |
2441 | float scale_x, scale_y, dx, dy; |
2442 | gboolean need_gradient = FALSE; |
2443 | const GdkRGBA *first_color; |
2444 | |
2445 | g_return_if_fail (snapshot != NULL); |
2446 | g_return_if_fail (center != NULL); |
2447 | g_return_if_fail (stops != NULL); |
2448 | g_return_if_fail (n_stops > 1); |
2449 | |
2450 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
2451 | gtk_graphene_rect_scale_affine (rect: bounds, scale_x, scale_y, dx, dy, res: &real_bounds); |
2452 | |
2453 | first_color = &stops[0].color; |
2454 | for (gsize i = 0; i < n_stops; i ++) |
2455 | { |
2456 | if (!gdk_rgba_equal (p1: first_color, p2: &stops[i].color)) |
2457 | { |
2458 | need_gradient = TRUE; |
2459 | break; |
2460 | } |
2461 | } |
2462 | |
2463 | if (need_gradient) |
2464 | { |
2465 | graphene_point_t real_center; |
2466 | |
2467 | real_center.x = scale_x * center->x + dx; |
2468 | real_center.y = scale_y * center->y + dy; |
2469 | node = gsk_repeating_radial_gradient_node_new (bounds: &real_bounds, |
2470 | center: &real_center, |
2471 | hradius: hradius * scale_x, |
2472 | vradius: vradius * scale_y, |
2473 | start, |
2474 | end, |
2475 | color_stops: stops, |
2476 | n_color_stops: n_stops); |
2477 | } |
2478 | else |
2479 | { |
2480 | node = gsk_color_node_new (rgba: first_color, bounds: &real_bounds); |
2481 | } |
2482 | |
2483 | gtk_snapshot_append_node_internal (snapshot, node); |
2484 | } |
2485 | |
2486 | /** |
2487 | * gtk_snapshot_append_border: |
2488 | * @snapshot: a `GtkSnapshot` |
2489 | * @outline: the outline of the border |
2490 | * @border_width: (array fixed-size=4): the stroke width of the border on |
2491 | * the top, right, bottom and left side respectively. |
2492 | * @border_color: (array fixed-size=4): the color used on the top, right, |
2493 | * bottom and left side. |
2494 | * |
2495 | * Appends a stroked border rectangle inside the given @outline. |
2496 | * |
2497 | * The four sides of the border can have different widths and colors. |
2498 | */ |
2499 | void |
2500 | gtk_snapshot_append_border (GtkSnapshot *snapshot, |
2501 | const GskRoundedRect *outline, |
2502 | const float border_width[4], |
2503 | const GdkRGBA border_color[4]) |
2504 | { |
2505 | GskRenderNode *node; |
2506 | GskRoundedRect real_outline; |
2507 | float scale_x, scale_y, dx, dy; |
2508 | |
2509 | g_return_if_fail (snapshot != NULL); |
2510 | g_return_if_fail (outline != NULL); |
2511 | g_return_if_fail (border_width != NULL); |
2512 | g_return_if_fail (border_color != NULL); |
2513 | |
2514 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &dx, dy: &dy); |
2515 | gsk_rounded_rect_scale_affine (dest: &real_outline, src: outline, scale_x, scale_y, dx, dy); |
2516 | |
2517 | node = gsk_border_node_new (outline: &real_outline, |
2518 | border_width: (float[4]) { |
2519 | border_width[0] * scale_y, |
2520 | border_width[1] * scale_x, |
2521 | border_width[2] * scale_y, |
2522 | border_width[3] * scale_x, |
2523 | }, |
2524 | border_color); |
2525 | |
2526 | gtk_snapshot_append_node_internal (snapshot, node); |
2527 | } |
2528 | |
2529 | /** |
2530 | * gtk_snapshot_append_inset_shadow: |
2531 | * @snapshot: a `GtkSnapshot` |
2532 | * @outline: outline of the region surrounded by shadow |
2533 | * @color: color of the shadow |
2534 | * @dx: horizontal offset of shadow |
2535 | * @dy: vertical offset of shadow |
2536 | * @spread: how far the shadow spreads towards the inside |
2537 | * @blur_radius: how much blur to apply to the shadow |
2538 | * |
2539 | * Appends an inset shadow into the box given by @outline. |
2540 | */ |
2541 | void |
2542 | gtk_snapshot_append_inset_shadow (GtkSnapshot *snapshot, |
2543 | const GskRoundedRect *outline, |
2544 | const GdkRGBA *color, |
2545 | float dx, |
2546 | float dy, |
2547 | float spread, |
2548 | float blur_radius) |
2549 | { |
2550 | GskRenderNode *node; |
2551 | GskRoundedRect real_outline; |
2552 | float scale_x, scale_y, x, y; |
2553 | |
2554 | g_return_if_fail (snapshot != NULL); |
2555 | g_return_if_fail (outline != NULL); |
2556 | g_return_if_fail (color != NULL); |
2557 | |
2558 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &x, dy: &y); |
2559 | gsk_rounded_rect_scale_affine (dest: &real_outline, src: outline, scale_x, scale_y, dx: x, dy: y); |
2560 | |
2561 | node = gsk_inset_shadow_node_new (outline: &real_outline, |
2562 | color, |
2563 | dx: scale_x * dx, |
2564 | dy: scale_y * dy, |
2565 | spread, |
2566 | blur_radius); |
2567 | |
2568 | gtk_snapshot_append_node_internal (snapshot, node); |
2569 | } |
2570 | |
2571 | /** |
2572 | * gtk_snapshot_append_outset_shadow: |
2573 | * @snapshot: a `GtkSnapshot` |
2574 | * @outline: outline of the region surrounded by shadow |
2575 | * @color: color of the shadow |
2576 | * @dx: horizontal offset of shadow |
2577 | * @dy: vertical offset of shadow |
2578 | * @spread: how far the shadow spreads towards the outside |
2579 | * @blur_radius: how much blur to apply to the shadow |
2580 | * |
2581 | * Appends an outset shadow node around the box given by @outline. |
2582 | */ |
2583 | void |
2584 | gtk_snapshot_append_outset_shadow (GtkSnapshot *snapshot, |
2585 | const GskRoundedRect *outline, |
2586 | const GdkRGBA *color, |
2587 | float dx, |
2588 | float dy, |
2589 | float spread, |
2590 | float blur_radius) |
2591 | { |
2592 | GskRenderNode *node; |
2593 | GskRoundedRect real_outline; |
2594 | float scale_x, scale_y, x, y; |
2595 | |
2596 | g_return_if_fail (snapshot != NULL); |
2597 | g_return_if_fail (outline != NULL); |
2598 | g_return_if_fail (color != NULL); |
2599 | |
2600 | gtk_snapshot_ensure_affine (snapshot, scale_x: &scale_x, scale_y: &scale_y, dx: &x, dy: &y); |
2601 | gsk_rounded_rect_scale_affine (dest: &real_outline, src: outline, scale_x, scale_y, dx: x, dy: y); |
2602 | |
2603 | node = gsk_outset_shadow_node_new (outline: &real_outline, |
2604 | color, |
2605 | dx: scale_x * dx, |
2606 | dy: scale_y * dy, |
2607 | spread, |
2608 | blur_radius); |
2609 | |
2610 | |
2611 | gtk_snapshot_append_node_internal (snapshot, node); |
2612 | } |
2613 | |