1 #define __SP_CAIRO_RENDERER_C__
3 /** \file
4 * Rendering with Cairo.
5 */
6 /*
7 * Author:
8 * Miklos Erdelyi <erdelyim@gmail.com>
9 *
10 * Copyright (C) 2006 Miklos Erdelyi
11 *
12 * Licensed under GNU GPL
13 */
15 #ifdef HAVE_CONFIG_H
16 # include "config.h"
17 #endif
19 #ifndef PANGO_ENABLE_BACKEND
20 #define PANGO_ENABLE_BACKEND
21 #endif
23 #ifndef PANGO_ENABLE_ENGINE
24 #define PANGO_ENABLE_ENGINE
25 #endif
28 #include <signal.h>
29 #include <errno.h>
31 #include <libnr/n-art-bpath.h>
32 #include <libnr/nr-matrix-ops.h>
33 #include <libnr/nr-matrix-fns.h>
34 #include <libnr/nr-matrix-translate-ops.h>
35 #include <libnr/nr-scale-matrix-ops.h>
37 #include "libnr/nr-matrix-rotate-ops.h"
38 #include "libnr/nr-matrix-translate-ops.h"
39 #include "libnr/nr-rotate-fns.h"
40 #include "libnr/nr-scale-ops.h"
41 #include "libnr/nr-scale-translate-ops.h"
42 #include "libnr/nr-translate-matrix-ops.h"
43 #include "libnr/nr-translate-scale-ops.h"
45 #include <glib/gmem.h>
47 #include <glibmm/i18n.h>
48 #include "display/nr-arena.h"
49 #include "display/nr-arena-item.h"
50 #include "display/nr-arena-group.h"
51 #include "display/curve.h"
52 #include "display/canvas-bpath.h"
53 #include "sp-item.h"
54 #include "sp-item-group.h"
55 #include "style.h"
56 #include "marker.h"
57 #include "sp-linear-gradient.h"
58 #include "sp-radial-gradient.h"
59 #include "sp-root.h"
60 #include "sp-shape.h"
61 #include "sp-use.h"
62 #include "sp-text.h"
63 #include "sp-flowtext.h"
64 #include "sp-image.h"
65 #include "sp-symbol.h"
66 #include "sp-pattern.h"
67 #include "sp-mask.h"
68 #include "sp-clippath.h"
70 #include <unit-constants.h>
71 #include "helper/png-write.h"
72 #include "helper/pixbuf-ops.h"
74 #include "cairo-renderer.h"
75 #include "cairo-render-context.h"
76 #include "extension/system.h"
78 #include "io/sys.h"
80 #include <cairo.h>
82 // include support for only the compiled-in surface types
83 #ifdef CAIRO_HAS_PDF_SURFACE
84 #include <cairo-pdf.h>
85 #endif
86 #ifdef CAIRO_HAS_PS_SURFACE
87 #include <cairo-ps.h>
88 #endif
90 //#define TRACE(_args) g_printf _args
91 #define TRACE(_args)
93 // FIXME: expose these from sp-clippath/mask.cpp
94 struct SPClipPathView {
95 SPClipPathView *next;
96 unsigned int key;
97 NRArenaItem *arenaitem;
98 NRRect bbox;
99 };
101 struct SPMaskView {
102 SPMaskView *next;
103 unsigned int key;
104 NRArenaItem *arenaitem;
105 NRRect bbox;
106 };
108 namespace Inkscape {
109 namespace Extension {
110 namespace Internal {
112 CairoRenderer::CairoRenderer(void)
113 {}
115 CairoRenderer::~CairoRenderer(void)
116 {
117 /* restore default signal handling for SIGPIPE */
118 #if !defined(_WIN32) && !defined(__WIN32__)
119 (void) signal(SIGPIPE, SIG_DFL);
120 #endif
122 return;
123 }
125 CairoRenderContext*
126 CairoRenderer::createContext(void)
127 {
128 CairoRenderContext *new_context = new CairoRenderContext(this);
129 g_assert( new_context != NULL );
131 new_context->_state_stack = NULL;
132 new_context->_state = NULL;
134 // create initial render state
135 CairoRenderState *state = new_context->_createState();
136 nr_matrix_set_identity(&state->transform);
137 new_context->_state_stack = g_slist_prepend(new_context->_state_stack, state);
138 new_context->_state = state;
140 return new_context;
141 }
143 void
144 CairoRenderer::destroyContext(CairoRenderContext *ctx)
145 {
146 delete ctx;
147 }
149 /*
151 Here comes the rendering part which could be put into the 'render' methods of SPItems'
153 */
155 /* The below functions are copy&pasted plus slightly modified from *_invoke_print functions. */
156 static void sp_item_invoke_render(SPItem *item, CairoRenderContext *ctx);
157 static void sp_group_render(SPItem *item, CairoRenderContext *ctx);
158 static void sp_use_render(SPItem *item, CairoRenderContext *ctx);
159 static void sp_shape_render(SPItem *item, CairoRenderContext *ctx);
160 static void sp_text_render(SPItem *item, CairoRenderContext *ctx);
161 static void sp_flowtext_render(SPItem *item, CairoRenderContext *ctx);
162 static void sp_image_render(SPItem *item, CairoRenderContext *ctx);
163 static void sp_symbol_render(SPItem *item, CairoRenderContext *ctx);
164 static void sp_asbitmap_render(SPItem *item, CairoRenderContext *ctx);
166 static void sp_shape_render (SPItem *item, CairoRenderContext *ctx)
167 {
168 NRRect pbox;
170 SPShape *shape = SP_SHAPE(item);
172 if (!shape->curve) return;
174 /* fixme: Think (Lauris) */
175 sp_item_invoke_bbox(item, &pbox, NR::identity(), TRUE);
176 NR::Matrix const i2d = sp_item_i2d_affine(item);
178 SPStyle* style = SP_OBJECT_STYLE (item);
179 if(style->filter.set != 0) {
180 sp_asbitmap_render(item, ctx);
181 return;
182 }
183 CairoRenderer *renderer = ctx->getRenderer();
185 NRBPath bp;
186 bp.path = SP_CURVE_BPATH(shape->curve);
188 ctx->renderPath(&bp, style, &pbox);
190 for (NArtBpath* bp = SP_CURVE_BPATH(shape->curve); bp->code != NR_END; bp++) {
191 for (int m = SP_MARKER_LOC_START; m < SP_MARKER_LOC_QTY; m++) {
192 if (sp_shape_marker_required (shape, m, bp)) {
194 SPMarker* marker = SP_MARKER (shape->marker[m]);
195 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[m]));
197 NR::Matrix tr(sp_shape_marker_get_transform(shape, bp));
199 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
200 tr = NR::scale(style->stroke_width.computed) * tr;
201 }
203 tr = marker_item->transform * marker->c2p * tr;
205 NR::Matrix old_tr = marker_item->transform;
206 marker_item->transform = tr;
207 renderer->renderItem (ctx, marker_item);
208 marker_item->transform = old_tr;
209 }
210 }
211 }
212 }
214 static void sp_group_render(SPItem *item, CairoRenderContext *ctx)
215 {
216 SPGroup *group = SP_GROUP(item);
217 CairoRenderer *renderer = ctx->getRenderer();
218 TRACE(("group op: %f\n", SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value)));
220 GSList *l = g_slist_reverse(group->childList(false));
221 while (l) {
222 SPObject *o = SP_OBJECT (l->data);
223 if (SP_IS_ITEM(o)) {
224 renderer->renderItem (ctx, SP_ITEM (o));
225 }
226 l = g_slist_remove (l, o);
227 }
228 }
230 static void sp_use_render(SPItem *item, CairoRenderContext *ctx)
231 {
232 bool translated = false;
233 NRMatrix tp;
234 SPUse *use = SP_USE(item);
235 CairoRenderer *renderer = ctx->getRenderer();
237 if ((use->x._set && use->x.computed != 0) || (use->y._set && use->y.computed != 0)) {
238 nr_matrix_set_translate(&tp, use->x.computed, use->y.computed);
239 ctx->pushState();
240 ctx->transform(&tp);
241 translated = true;
242 }
244 if (use->child && SP_IS_ITEM(use->child)) {
245 renderer->renderItem(ctx, SP_ITEM(use->child));
246 }
248 if (translated) {
249 ctx->popState();
250 }
251 }
253 static void sp_text_render(SPItem *item, CairoRenderContext *ctx)
254 {
255 SPText *group = SP_TEXT (item);
256 group->layout.showGlyphs(ctx);
257 }
259 static void sp_flowtext_render(SPItem *item, CairoRenderContext *ctx)
260 {
261 SPFlowtext *group = SP_FLOWTEXT(item);
262 group->layout.showGlyphs(ctx);
263 }
265 static void sp_image_render(SPItem *item, CairoRenderContext *ctx)
266 {
267 SPImage *image;
268 NRMatrix tp, s, t;
269 guchar *px;
270 int w, h, rs;
272 image = SP_IMAGE (item);
274 if (!image->pixbuf) return;
275 if ((image->width.computed <= 0.0) || (image->height.computed <= 0.0)) return;
277 px = gdk_pixbuf_get_pixels (image->pixbuf);
278 w = gdk_pixbuf_get_width (image->pixbuf);
279 h = gdk_pixbuf_get_height (image->pixbuf);
280 rs = gdk_pixbuf_get_rowstride (image->pixbuf);
282 double x = image->x.computed;
283 double y = image->y.computed;
284 double width = image->width.computed;
285 double height = image->height.computed;
287 if (image->aspect_align != SP_ASPECT_NONE) {
288 calculatePreserveAspectRatio (image->aspect_align, image->aspect_clip, (double)w, (double)h,
289 &x, &y, &width, &height);
290 }
292 if (image->aspect_clip == SP_ASPECT_SLICE && !ctx->getCurrentState()->has_overflow) {
293 ctx->addClippingRect(image->x.computed, image->y.computed, image->width.computed, image->height.computed);
294 }
296 nr_matrix_set_translate (&tp, x, y);
297 nr_matrix_set_scale (&s, width / (double)w, height / (double)h);
298 nr_matrix_multiply (&t, &s, &tp);
300 ctx->renderImage (px, w, h, rs, &t, SP_OBJECT_STYLE (item));
301 }
303 static void sp_symbol_render(SPItem *item, CairoRenderContext *ctx)
304 {
305 SPSymbol *symbol = SP_SYMBOL(item);
306 if (!SP_OBJECT_IS_CLONED (symbol))
307 return;
309 /* Cloned <symbol> is actually renderable */
310 ctx->pushState();
311 ctx->transform(&symbol->c2p);
313 // apply viewbox if set
314 if (0 /*symbol->viewBox_set*/) {
315 NRMatrix vb2user;
316 double x, y, width, height;
317 double view_width, view_height;
318 x = 0.0;
319 y = 0.0;
320 width = 1.0;
321 height = 1.0;
323 view_width = symbol->viewBox.x1 - symbol->viewBox.x0;
324 view_height = symbol->viewBox.y1 - symbol->viewBox.y0;
326 calculatePreserveAspectRatio(symbol->aspect_align, symbol->aspect_clip, view_width, view_height,
327 &x, &y,&width, &height);
329 // [itemTransform *] translate(x, y) * scale(w/vw, h/vh) * translate(-vx, -vy);
330 nr_matrix_set_identity(&vb2user);
331 vb2user[0] = width / view_width;
332 vb2user[3] = height / view_height;
333 vb2user[4] = x - symbol->viewBox.x0 * vb2user[0];
334 vb2user[5] = y - symbol->viewBox.y0 * vb2user[3];
336 ctx->transform(&vb2user);
337 }
339 sp_group_render(item, ctx);
340 ctx->popState();
341 }
343 static void sp_root_render(SPItem *item, CairoRenderContext *ctx)
344 {
345 SPRoot *root = SP_ROOT(item);
346 CairoRenderer *renderer = ctx->getRenderer();
348 if (!ctx->getCurrentState()->has_overflow && SP_OBJECT(item)->parent)
349 ctx->addClippingRect(root->x.computed, root->y.computed, root->width.computed, root->height.computed);
351 ctx->pushState();
352 renderer->setStateForItem(ctx, item);
353 ctx->transform(root->c2p);
354 sp_group_render(item, ctx);
355 ctx->popState();
356 }
358 /**
359 this function convert the item to a raster image and include the raster into the cairo renderer
360 */
361 static void sp_asbitmap_render(SPItem *item, CairoRenderContext *ctx)
362 {
363 g_warning("render as bitmap");
365 //the code now was copied from sp_selection_create_bitmap_copy
367 SPDocument *document = SP_OBJECT(item)->document;
368 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
370 // Get the bounding box of the selection
371 //NR::Maybe<NR::Rect> _bbox = item->getBounds(sp_item_i2d_affine(item));
372 // NRRect bbox = item->getBounds(sp_item_i2d_affine(item));
373 NRRect bbox(item->getBounds(sp_item_i2d_affine(item)));
376 // List of the items to show; all others will be hidden
377 GSList *items = NULL; //g_slist_copy ((GSList *) selection->itemList());
378 items = g_slist_append(items, item);
380 // Generate a random value from the current time (you may create bitmap from the same object(s)
381 // multiple times, and this is done so that they don't clash)
382 GTimeVal cu;
383 g_get_current_time (&cu);
384 guint current = (int) (cu.tv_sec * 1000000 + cu.tv_usec) % 1024;
386 // Create the filename
387 gchar *filename = g_strdup_printf ("%s-%s-%u.png", document->name, SP_OBJECT_REPR(items->data)->attribute("id"), current);
388 // Imagemagick is known not to handle spaces in filenames, so we replace anything but letters,
389 // digits, and a few other chars, with "_"
390 filename = g_strcanon (filename, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_.=+~$#@^&!?", '_');
391 // Build the complete path by adding document->base if set
392 gchar *filepath = g_build_filename (document->base?document->base:"", filename, NULL);
394 //g_print ("%s\n", filepath);
396 // Remember parent and z-order of the topmost one
397 gint pos = SP_OBJECT_REPR(g_slist_last(items)->data)->position();
398 SPObject *parent_object = SP_OBJECT_PARENT(g_slist_last(items)->data);
399 Inkscape::XML::Node *parent = SP_OBJECT_REPR(parent_object);
401 // Calculate resolution
402 double res;
403 /** @TODO reimplement the resolution stuff
404 */
405 res = PX_PER_IN;
407 // The width and height of the bitmap in pixels
408 unsigned width = (unsigned) floor ((bbox.x1 - bbox.x0) * res / PX_PER_IN);
409 unsigned height =(unsigned) floor ((bbox.y1 - bbox.y0) * res / PX_PER_IN);
411 // Find out if we have to run a filter
412 gchar const *run = NULL;
413 gchar const *filter = NULL;
414 /** @TODO reimplement the filter stuff
415 //gchar const *filter = prefs_get_string_attribute ("options.createbitmap", "filter");
416 if (filter) {
417 // filter command is given;
418 // see if we have a parameter to pass to it
419 gchar const *param1 = prefs_get_string_attribute ("options.createbitmap", "filter_param1");
420 if (param1) {
421 if (param1[strlen(param1) - 1] == '%') {
422 // if the param string ends with %, interpret it as a percentage of the image's max dimension
423 gchar p1[256];
424 g_ascii_dtostr (p1, 256, ceil (g_ascii_strtod (param1, NULL) * MAX(width, height) / 100));
425 // the first param is always the image filename, the second is param1
426 run = g_strdup_printf ("%s \"%s\" %s", filter, filepath, p1);
427 } else {
428 // otherwise pass the param1 unchanged
429 run = g_strdup_printf ("%s \"%s\" %s", filter, filepath, param1);
430 }
431 } else {
432 // run without extra parameter
433 run = g_strdup_printf ("%s \"%s\"", filter, filepath);
434 }
435 }
436 */
437 // Calculate the matrix that will be applied to the image so that it exactly overlaps the source objects
438 NR::Matrix eek = sp_item_i2d_affine (SP_ITEM(parent_object));
439 NR::Matrix t;
441 double shift_x = bbox.x0;
442 double shift_y = bbox.y1;
443 if (res == PX_PER_IN) { // for default 90 dpi, snap it to pixel grid
444 shift_x = round (shift_x);
445 shift_y = -round (-shift_y); // this gets correct rounding despite coordinate inversion, remove the negations when the inversion is gone
446 }
447 t = (NR::Matrix)(NR::scale(1, -1) * (NR::Matrix)(NR::translate (shift_x, shift_y) * eek.inverse()));
449 // Do the export
450 GdkPixbuf *pb = sp_generate_internal_bitmap(document, filepath,
451 bbox.x0, bbox.y0, bbox.x1, bbox.y1, width, height, res, res, (guint32) 0xffffff00, items );
453 /*sp_export_png_file(document, filepath,
454 bbox.x0, bbox.y0, bbox.x1, bbox.y1,
455 width, height, res, res,
456 (guint32) 0xffffff00,
457 NULL, NULL,
458 true, //bool force_overwrite,
459 items);
460 */
461 // Run filter, if any
462 /*
463 if (run) {
464 g_print ("Running external filter: %s\n", run);
465 system (run);
466 }
467 */
468 // Import the image back
469 //GdkPixbuf *pb = gdk_pixbuf_new_from_file (filepath, NULL);
470 if (pb) {
471 unsigned char *px = gdk_pixbuf_get_pixels (pb);
472 unsigned int w = gdk_pixbuf_get_width(pb);
473 unsigned int h = gdk_pixbuf_get_height(pb);
474 unsigned int rs = gdk_pixbuf_get_rowstride(pb);
475 NRMatrix matrix = t;
476 //nr_matrix_set_identity(&matrix);
478 ctx->renderImage (px, w, h, rs, &matrix, SP_OBJECT_STYLE (item));
479 /*
480 // Create the repr for the image
481 Inkscape::XML::Node * repr = xml_doc->createElement("svg:image");
482 repr->setAttribute("xlink:href", filename);
483 repr->setAttribute("sodipodi:absref", filepath);
484 if (res == PX_PER_IN) { // for default 90 dpi, snap it to pixel grid
485 sp_repr_set_svg_double(repr, "width", width);
486 sp_repr_set_svg_double(repr, "height", height);
487 } else {
488 sp_repr_set_svg_double(repr, "width", (bbox.x1 - bbox.x0));
489 sp_repr_set_svg_double(repr, "height", (bbox.y1 - bbox.y0));
490 }
492 // Write transform
493 gchar *c=sp_svg_transform_write(t);
494 repr->setAttribute("transform", c);
495 g_free(c);
497 // add the new repr to the parent
498 parent->appendChild(repr);
500 // move to the saved position
501 repr->setPosition(pos > 0 ? pos + 1 : 1);
503 // Clean up
504 Inkscape::GC::release(repr);
505 */
506 gdk_pixbuf_unref (pb);
508 // Complete undoable transaction
509 // sp_document_done (document, SP_VERB_SELECTION_CREATE_BITMAP, _("Create bitmap"));
510 }
511 g_slist_free (items);
513 g_free (filename);
514 g_free (filepath);
515 }
517 static void sp_item_invoke_render(SPItem *item, CairoRenderContext *ctx)
518 {
519 /*
520 if(ctx->_state->has_filtereffect)
521 printf("\nhas filtereffects");
522 */
524 if (SP_IS_ROOT(item)) {
525 TRACE(("root\n"));
526 return sp_root_render(item, ctx);
527 } else if (SP_IS_GROUP(item)) {
528 TRACE(("group\n"));
529 return sp_group_render(item, ctx);
530 } else if (SP_IS_SHAPE(item)) {
531 TRACE(("shape\n"));
532 return sp_shape_render(item, ctx);
533 } else if (SP_IS_USE(item)) {
534 TRACE(("use begin---\n"));
535 sp_use_render(item, ctx);
536 TRACE(("---use end\n"));
537 } else if (SP_IS_SYMBOL(item)) {
538 TRACE(("symbol\n"));
539 return sp_symbol_render(item, ctx);
540 } else if (SP_IS_TEXT(item)) {
541 TRACE(("text\n"));
542 return sp_text_render(item, ctx);
543 } else if (SP_IS_FLOWTEXT(item)) {
544 TRACE(("flowtext\n"));
545 return sp_flowtext_render(item, ctx);
546 } else if (SP_IS_IMAGE(item)) {
547 TRACE(("image\n"));
548 return sp_image_render(item, ctx);
549 }
550 }
552 void
553 CairoRenderer::setStateForItem(CairoRenderContext *ctx, SPItem const *item)
554 {
555 SPStyle const *style = SP_OBJECT_STYLE(item);
556 ctx->setStateForStyle(style);
558 CairoRenderState *state = ctx->getCurrentState();
559 state->clip_path = item->clip_ref->getObject();
560 state->mask = item->mask_ref->getObject();
562 // If parent_has_userspace is true the parent state's transform
563 // has to be used for the mask's/clippath's context.
564 // This is so because we use the image's/(flow)text's transform for positioning
565 // instead of explicitly specifying it and letting the renderer do the
566 // transformation before rendering the item.
567 if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item) || SP_IS_IMAGE(item))
568 state->parent_has_userspace = TRUE;
569 TRACE(("set op: %f\n", state->opacity));
570 }
572 void
573 CairoRenderer::renderItem(CairoRenderContext *ctx, SPItem *item)
574 {
575 ctx->pushState();
576 setStateForItem(ctx, item);
578 CairoRenderState *state = ctx->getCurrentState();
579 state->need_layer = ( state->mask || state->clip_path || state->opacity != 1.0 );
581 if (state->need_layer) {
582 state->merge_opacity = FALSE;
583 ctx->pushLayer();
584 }
585 ctx->transform(item->transform);
586 sp_item_invoke_render(item, ctx);
588 if (state->need_layer)
589 ctx->popLayer();
591 ctx->popState();
592 }
594 bool
595 CairoRenderer::setupDocument(CairoRenderContext *ctx, SPDocument *doc)
596 {
597 g_assert( ctx != NULL );
599 if (ctx->_vector_based_target) {
600 // width and height in pt
601 ctx->_width = sp_document_width(doc) * PT_PER_PX;
602 ctx->_height = sp_document_height(doc) * PT_PER_PX;
603 } else {
604 ctx->_width = sp_document_width(doc);
605 ctx->_height = sp_document_height(doc);
606 }
608 NRRect d;
609 bool pageBoundingBox = true;
610 if (pageBoundingBox) {
611 d.x0 = d.y0 = 0;
612 d.x1 = ceil(ctx->_width);
613 d.y1 = ceil(ctx->_height);
614 } else {
615 SPItem* doc_item = SP_ITEM(sp_document_root(doc));
616 sp_item_invoke_bbox(doc_item, &d, sp_item_i2r_affine(doc_item), TRUE);
617 if (ctx->_vector_based_target) {
618 // convert from px to pt
619 d.x0 *= PT_PER_PX;
620 d.x1 *= PT_PER_PX;
621 d.y0 *= PT_PER_PX;
622 d.y1 *= PT_PER_PX;
623 }
624 }
625 TRACE(("%f x %f\n", ctx->_width, ctx->_height));
627 return ctx->setupSurface(d.x1-d.x0, d.y1-d.y0);
628 }
630 #include "macros.h" // SP_PRINT_*
632 void
633 CairoRenderer::applyClipPath(CairoRenderContext *ctx, SPClipPath const *cp)
634 {
635 g_assert( ctx != NULL && ctx->_is_valid );
637 if (cp == NULL)
638 return;
640 CairoRenderContext::CairoRenderMode saved_mode = ctx->getRenderMode();
641 ctx->setRenderMode(CairoRenderContext::RENDER_MODE_CLIP);
643 NRMatrix saved_ctm;
644 if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
645 NRMatrix t;
646 //SP_PRINT_DRECT("clipd", cp->display->bbox);
647 NRRect clip_bbox(cp->display->bbox);
648 nr_matrix_set_scale(&t, clip_bbox.x1 - clip_bbox.x0, clip_bbox.y1 - clip_bbox.y0);
649 t.c[4] = clip_bbox.x0;
650 t.c[5] = clip_bbox.y0;
651 nr_matrix_multiply(&t, &t, &ctx->getCurrentState()->transform);
652 ctx->getTransform(&saved_ctm);
653 ctx->setTransform(&t);
654 }
656 TRACE(("BEGIN clip\n"));
657 SPObject *co = SP_OBJECT(cp);
658 for (SPObject *child = sp_object_first_child(co) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
659 if (SP_IS_ITEM(child)) {
660 SPItem *item = SP_ITEM(child);
661 renderItem(ctx, item);
662 }
663 }
664 TRACE(("END clip\n"));
666 // do clipping only if this was the first call to applyClipPath
667 if (ctx->getClipMode() == CairoRenderContext::CLIP_MODE_PATH
668 && saved_mode == CairoRenderContext::RENDER_MODE_NORMAL)
669 cairo_clip(ctx->_cr);
671 if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX)
672 ctx->setTransform(&saved_ctm);
674 ctx->setRenderMode(saved_mode);
675 }
677 void
678 CairoRenderer::applyMask(CairoRenderContext *ctx, SPMask const *mask)
679 {
680 g_assert( ctx != NULL && ctx->_is_valid );
682 if (mask == NULL)
683 return;
685 //SP_PRINT_DRECT("maskd", &mask->display->bbox);
686 NRRect mask_bbox(mask->display->bbox);
687 // TODO: should the bbox be transformed if maskUnits != userSpaceOnUse ?
688 if (mask->maskContentUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
689 NRMatrix t;
690 nr_matrix_set_scale(&t, mask_bbox.x1 - mask_bbox.x0, mask_bbox.y1 - mask_bbox.y0);
691 t.c[4] = mask_bbox.x0;
692 t.c[5] = mask_bbox.y0;
693 nr_matrix_multiply(&t, &t, &ctx->getCurrentState()->transform);
694 ctx->setTransform(&t);
695 }
697 // clip mask contents
698 ctx->addClippingRect(mask_bbox.x0, mask_bbox.y0, mask_bbox.x1 - mask_bbox.x0, mask_bbox.y1 - mask_bbox.y0);
700 ctx->pushState();
702 TRACE(("BEGIN mask\n"));
703 SPObject *co = SP_OBJECT(mask);
704 for (SPObject *child = sp_object_first_child(co) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
705 if (SP_IS_ITEM(child)) {
706 SPItem *item = SP_ITEM(child);
707 renderItem(ctx, item);
708 }
709 }
710 TRACE(("END mask\n"));
712 ctx->popState();
713 }
715 void
716 calculatePreserveAspectRatio(unsigned int aspect_align, unsigned int aspect_clip, double vp_width, double vp_height,
717 double *x, double *y, double *width, double *height)
718 {
719 if (aspect_align == SP_ASPECT_NONE)
720 return;
722 double scalex, scaley, scale;
723 double new_width, new_height;
724 scalex = *width / vp_width;
725 scaley = *height / vp_height;
726 scale = (aspect_clip == SP_ASPECT_MEET) ? MIN(scalex, scaley) : MAX(scalex, scaley);
727 new_width = vp_width * scale;
728 new_height = vp_height * scale;
729 /* Now place viewbox to requested position */
730 switch (aspect_align) {
731 case SP_ASPECT_XMIN_YMIN:
732 break;
733 case SP_ASPECT_XMID_YMIN:
734 *x -= 0.5 * (new_width - *width);
735 break;
736 case SP_ASPECT_XMAX_YMIN:
737 *x -= 1.0 * (new_width - *width);
738 break;
739 case SP_ASPECT_XMIN_YMID:
740 *y -= 0.5 * (new_height - *height);
741 break;
742 case SP_ASPECT_XMID_YMID:
743 *x -= 0.5 * (new_width - *width);
744 *y -= 0.5 * (new_height - *height);
745 break;
746 case SP_ASPECT_XMAX_YMID:
747 *x -= 1.0 * (new_width - *width);
748 *y -= 0.5 * (new_height - *height);
749 break;
750 case SP_ASPECT_XMIN_YMAX:
751 *y -= 1.0 * (new_height - *height);
752 break;
753 case SP_ASPECT_XMID_YMAX:
754 *x -= 0.5 * (new_width - *width);
755 *y -= 1.0 * (new_height - *height);
756 break;
757 case SP_ASPECT_XMAX_YMAX:
758 *x -= 1.0 * (new_width - *width);
759 *y -= 1.0 * (new_height - *height);
760 break;
761 default:
762 break;
763 }
764 *width = new_width;
765 *height = new_height;
766 }
768 #include "clear-n_.h"
770 } /* namespace Internal */
771 } /* namespace Extension */
772 } /* namespace Inkscape */
774 #undef TRACE
776 /* End of GNU GPL code */
778 /*
779 Local Variables:
780 mode:c++
781 c-file-style:"stroustrup"
782 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
783 indent-tabs-mode:nil
784 fill-column:99
785 End:
786 */
787 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :