eb19c3cbd67ab1da98564c5e77a93e8860fb27cc
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"
44 #include "libnr/nr-convert2geom.h"
45 #include <2geom/transforms.h>
46 #include <2geom/pathvector.h>
48 #include <glib/gmem.h>
50 #include <glibmm/i18n.h>
51 #include "display/nr-arena.h"
52 #include "display/nr-arena-item.h"
53 #include "display/nr-arena-group.h"
54 #include "display/curve.h"
55 #include "display/canvas-bpath.h"
56 #include "sp-item.h"
57 #include "sp-item-group.h"
58 #include "style.h"
59 #include "marker.h"
60 #include "sp-linear-gradient.h"
61 #include "sp-radial-gradient.h"
62 #include "sp-root.h"
63 #include "sp-shape.h"
64 #include "sp-use.h"
65 #include "sp-text.h"
66 #include "sp-flowtext.h"
67 #include "sp-image.h"
68 #include "sp-symbol.h"
69 #include "sp-pattern.h"
70 #include "sp-mask.h"
71 #include "sp-clippath.h"
73 #include <unit-constants.h>
74 #include "helper/png-write.h"
75 #include "helper/pixbuf-ops.h"
77 #include "cairo-renderer.h"
78 #include "cairo-render-context.h"
79 #include "extension/system.h"
81 #include "io/sys.h"
83 #include <cairo.h>
85 // include support for only the compiled-in surface types
86 #ifdef CAIRO_HAS_PDF_SURFACE
87 #include <cairo-pdf.h>
88 #endif
89 #ifdef CAIRO_HAS_PS_SURFACE
90 #include <cairo-ps.h>
91 #endif
93 //#define TRACE(_args) g_printf _args
94 #define TRACE(_args)
96 // FIXME: expose these from sp-clippath/mask.cpp
97 struct SPClipPathView {
98 SPClipPathView *next;
99 unsigned int key;
100 NRArenaItem *arenaitem;
101 NRRect bbox;
102 };
104 struct SPMaskView {
105 SPMaskView *next;
106 unsigned int key;
107 NRArenaItem *arenaitem;
108 NRRect bbox;
109 };
111 namespace Inkscape {
112 namespace Extension {
113 namespace Internal {
115 CairoRenderer::CairoRenderer(void)
116 {}
118 CairoRenderer::~CairoRenderer(void)
119 {
120 /* restore default signal handling for SIGPIPE */
121 #if !defined(_WIN32) && !defined(__WIN32__)
122 (void) signal(SIGPIPE, SIG_DFL);
123 #endif
125 return;
126 }
128 CairoRenderContext*
129 CairoRenderer::createContext(void)
130 {
131 CairoRenderContext *new_context = new CairoRenderContext(this);
132 g_assert( new_context != NULL );
134 new_context->_state_stack = NULL;
135 new_context->_state = NULL;
137 // create initial render state
138 CairoRenderState *state = new_context->_createState();
139 state->transform.set_identity();
140 new_context->_state_stack = g_slist_prepend(new_context->_state_stack, state);
141 new_context->_state = state;
143 return new_context;
144 }
146 void
147 CairoRenderer::destroyContext(CairoRenderContext *ctx)
148 {
149 delete ctx;
150 }
152 /*
154 Here comes the rendering part which could be put into the 'render' methods of SPItems'
156 */
158 /* The below functions are copy&pasted plus slightly modified from *_invoke_print functions. */
159 static void sp_item_invoke_render(SPItem *item, CairoRenderContext *ctx);
160 static void sp_group_render(SPItem *item, CairoRenderContext *ctx);
161 static void sp_use_render(SPItem *item, CairoRenderContext *ctx);
162 static void sp_shape_render(SPItem *item, CairoRenderContext *ctx);
163 static void sp_text_render(SPItem *item, CairoRenderContext *ctx);
164 static void sp_flowtext_render(SPItem *item, CairoRenderContext *ctx);
165 static void sp_image_render(SPItem *item, CairoRenderContext *ctx);
166 static void sp_symbol_render(SPItem *item, CairoRenderContext *ctx);
167 static void sp_asbitmap_render(SPItem *item, CairoRenderContext *ctx);
169 /* TODO FIXME: this does not render painting-marker-01-f.svg of SVG1.1 Test suite correctly. (orientation of one of the markers middle left ) */
170 static void sp_shape_render (SPItem *item, CairoRenderContext *ctx)
171 {
172 NRRect pbox;
174 SPShape *shape = SP_SHAPE(item);
176 if (!shape->curve) return;
178 /* fixme: Think (Lauris) */
179 sp_item_invoke_bbox(item, &pbox, NR::identity(), TRUE);
181 SPStyle* style = SP_OBJECT_STYLE (item);
182 CairoRenderer *renderer = ctx->getRenderer();
184 const_NRBPath bp;
185 bp.path = SP_CURVE_BPATH(shape->curve);
187 ctx->renderPath(&bp, style, &pbox);
189 Geom::PathVector const & pathv = shape->curve->get_pathvector();
190 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
191 if ( shape->marker[SP_MARKER_LOC_START] ) {
192 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_START]);
193 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_START]));
195 Geom::Point p = path_it->front().pointAt(0);
196 Geom::Point tang = path_it->front().unitTangentAt(0);
197 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform(p, tang, tang)));
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 }
211 if ( shape->marker[SP_MARKER_LOC_MID] ) {
212 Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
213 Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
214 while (curve_it2 != path_it->end_default())
215 {
216 /* Put marker between curve_it1 and curve_it2.
217 * Loop to end_default (so including closing segment), because when a path is closed,
218 * there should be a midpoint marker between last segment and closing straight line segment */
220 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_MID]);
221 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_MID]));
223 Geom::Point p = curve_it1->pointAt(1);
224 Geom::Point tang1 = curve_it1->unitTangentAt(1);
225 Geom::Point tang2 = curve_it2->unitTangentAt(0);
226 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform(p, tang1, tang2)));
228 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
229 tr = NR::scale(style->stroke_width.computed) * tr;
230 }
232 tr = marker_item->transform * marker->c2p * tr;
234 NR::Matrix old_tr = marker_item->transform;
235 marker_item->transform = tr;
236 renderer->renderItem (ctx, marker_item);
237 marker_item->transform = old_tr;
239 ++curve_it1;
240 ++curve_it2;
241 }
242 }
244 if ( shape->marker[SP_MARKER_LOC_END] ) {
245 SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_END]);
246 SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_END]));
248 Geom::Point p = path_it->back_default().pointAt(1);
249 Geom::Point tang = path_it->back_default().unitTangentAt(1);
250 NR::Matrix tr(from_2geom(sp_shape_marker_get_transform(p, tang, tang)));
252 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
253 tr = NR::scale(style->stroke_width.computed) * tr;
254 }
256 tr = marker_item->transform * marker->c2p * tr;
258 NR::Matrix old_tr = marker_item->transform;
259 marker_item->transform = tr;
260 renderer->renderItem (ctx, marker_item);
261 marker_item->transform = old_tr;
262 }
263 }
264 }
266 static void sp_group_render(SPItem *item, CairoRenderContext *ctx)
267 {
268 SPGroup *group = SP_GROUP(item);
269 CairoRenderer *renderer = ctx->getRenderer();
270 TRACE(("group op: %f\n", SP_SCALE24_TO_FLOAT(SP_OBJECT_STYLE(item)->opacity.value)));
272 GSList *l = g_slist_reverse(group->childList(false));
273 while (l) {
274 SPObject *o = SP_OBJECT (l->data);
275 if (SP_IS_ITEM(o)) {
276 renderer->renderItem (ctx, SP_ITEM (o));
277 }
278 l = g_slist_remove (l, o);
279 }
280 }
282 static void sp_use_render(SPItem *item, CairoRenderContext *ctx)
283 {
284 bool translated = false;
285 SPUse *use = SP_USE(item);
286 CairoRenderer *renderer = ctx->getRenderer();
288 if ((use->x._set && use->x.computed != 0) || (use->y._set && use->y.computed != 0)) {
289 NR::Matrix tp(NR::translate(use->x.computed, use->y.computed));
290 ctx->pushState();
291 ctx->transform(&tp);
292 translated = true;
293 }
295 if (use->child && SP_IS_ITEM(use->child)) {
296 renderer->renderItem(ctx, SP_ITEM(use->child));
297 }
299 if (translated) {
300 ctx->popState();
301 }
302 }
304 static void sp_text_render(SPItem *item, CairoRenderContext *ctx)
305 {
306 SPText *group = SP_TEXT (item);
307 group->layout.showGlyphs(ctx);
308 }
310 static void sp_flowtext_render(SPItem *item, CairoRenderContext *ctx)
311 {
312 SPFlowtext *group = SP_FLOWTEXT(item);
313 group->layout.showGlyphs(ctx);
314 }
316 static void sp_image_render(SPItem *item, CairoRenderContext *ctx)
317 {
318 SPImage *image;
319 guchar *px;
320 int w, h, rs;
322 image = SP_IMAGE (item);
324 if (!image->pixbuf) return;
325 if ((image->width.computed <= 0.0) || (image->height.computed <= 0.0)) return;
327 px = gdk_pixbuf_get_pixels (image->pixbuf);
328 w = gdk_pixbuf_get_width (image->pixbuf);
329 h = gdk_pixbuf_get_height (image->pixbuf);
330 rs = gdk_pixbuf_get_rowstride (image->pixbuf);
332 double x = image->x.computed;
333 double y = image->y.computed;
334 double width = image->width.computed;
335 double height = image->height.computed;
337 if (image->aspect_align != SP_ASPECT_NONE) {
338 calculatePreserveAspectRatio (image->aspect_align, image->aspect_clip, (double)w, (double)h,
339 &x, &y, &width, &height);
340 }
342 if (image->aspect_clip == SP_ASPECT_SLICE && !ctx->getCurrentState()->has_overflow) {
343 ctx->addClippingRect(image->x.computed, image->y.computed, image->width.computed, image->height.computed);
344 }
346 NR::translate tp(x, y);
347 NR::scale s(width / (double)w, height / (double)h);
348 NR::Matrix t(s * tp);
350 ctx->renderImage (px, w, h, rs, &t, SP_OBJECT_STYLE (item));
351 }
353 static void sp_symbol_render(SPItem *item, CairoRenderContext *ctx)
354 {
355 SPSymbol *symbol = SP_SYMBOL(item);
356 if (!SP_OBJECT_IS_CLONED (symbol))
357 return;
359 /* Cloned <symbol> is actually renderable */
360 ctx->pushState();
361 ctx->transform(&symbol->c2p);
363 // apply viewbox if set
364 if (0 /*symbol->viewBox_set*/) {
365 NR::Matrix vb2user;
366 double x, y, width, height;
367 double view_width, view_height;
368 x = 0.0;
369 y = 0.0;
370 width = 1.0;
371 height = 1.0;
373 view_width = symbol->viewBox.x1 - symbol->viewBox.x0;
374 view_height = symbol->viewBox.y1 - symbol->viewBox.y0;
376 calculatePreserveAspectRatio(symbol->aspect_align, symbol->aspect_clip, view_width, view_height,
377 &x, &y,&width, &height);
379 // [itemTransform *] translate(x, y) * scale(w/vw, h/vh) * translate(-vx, -vy);
380 vb2user.set_identity();
381 vb2user[0] = width / view_width;
382 vb2user[3] = height / view_height;
383 vb2user[4] = x - symbol->viewBox.x0 * vb2user[0];
384 vb2user[5] = y - symbol->viewBox.y0 * vb2user[3];
386 ctx->transform(&vb2user);
387 }
389 sp_group_render(item, ctx);
390 ctx->popState();
391 }
393 static void sp_root_render(SPItem *item, CairoRenderContext *ctx)
394 {
395 SPRoot *root = SP_ROOT(item);
396 CairoRenderer *renderer = ctx->getRenderer();
398 if (!ctx->getCurrentState()->has_overflow && SP_OBJECT(item)->parent)
399 ctx->addClippingRect(root->x.computed, root->y.computed, root->width.computed, root->height.computed);
401 ctx->pushState();
402 renderer->setStateForItem(ctx, item);
403 ctx->transform(&root->c2p);
404 sp_group_render(item, ctx);
405 ctx->popState();
406 }
408 /**
409 this function convert the item to a raster image and include the raster into the cairo renderer
410 */
411 static void sp_asbitmap_render(SPItem *item, CairoRenderContext *ctx)
412 {
413 g_warning("render as bitmap");
415 //the code now was copied from sp_selection_create_bitmap_copy
417 SPDocument *document = SP_OBJECT(item)->document;
418 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(document);
420 // Get the bounding box of the selection
421 //NR::Maybe<NR::Rect> _bbox = item->getBounds(from_2geom(sp_item_i2d_affine(item)));
422 // NRRect bbox = item->getBounds(from_2geom(sp_item_i2d_affine(item)));
423 NRRect bbox(item->getBounds(from_2geom(sp_item_i2d_affine(item))));
426 // List of the items to show; all others will be hidden
427 GSList *items = NULL; //g_slist_copy ((GSList *) selection->itemList());
428 items = g_slist_append(items, item);
430 // Remember parent and z-order of the topmost one
431 gint pos = SP_OBJECT_REPR(g_slist_last(items)->data)->position();
432 SPObject *parent_object = SP_OBJECT_PARENT(g_slist_last(items)->data);
433 Inkscape::XML::Node *parent = SP_OBJECT_REPR(parent_object);
435 // Calculate resolution
436 double res;
437 /** @TODO reimplement the resolution stuff
438 */
439 res = ctx->getBitmapResolution();
440 if(res == 0) {
441 res = PX_PER_IN;
442 }
445 // The width and height of the bitmap in pixels
446 unsigned width = (unsigned) floor ((bbox.x1 - bbox.x0) * res / PX_PER_IN);
447 unsigned height =(unsigned) floor ((bbox.y1 - bbox.y0) * res / PX_PER_IN);
449 // Find out if we have to run a filter
450 gchar const *run = NULL;
451 gchar const *filter = NULL;
452 /** @TODO reimplement the filter stuff
453 //gchar const *filter = prefs_get_string_attribute ("options.createbitmap", "filter");
454 if (filter) {
455 // filter command is given;
456 // see if we have a parameter to pass to it
457 gchar const *param1 = prefs_get_string_attribute ("options.createbitmap", "filter_param1");
458 if (param1) {
459 if (param1[strlen(param1) - 1] == '%') {
460 // if the param string ends with %, interpret it as a percentage of the image's max dimension
461 gchar p1[256];
462 g_ascii_dtostr (p1, 256, ceil (g_ascii_strtod (param1, NULL) * MAX(width, height) / 100));
463 // the first param is always the image filename, the second is param1
464 run = g_strdup_printf ("%s \"%s\" %s", filter, filepath, p1);
465 } else {
466 // otherwise pass the param1 unchanged
467 run = g_strdup_printf ("%s \"%s\" %s", filter, filepath, param1);
468 }
469 } else {
470 // run without extra parameter
471 run = g_strdup_printf ("%s \"%s\"", filter, filepath);
472 }
473 }
474 */
475 // Calculate the matrix that will be applied to the image so that it exactly overlaps the source objects
476 NR::Matrix eek = from_2geom(sp_item_i2d_affine (SP_ITEM(parent_object)));
477 NR::Matrix t;
479 double shift_x = bbox.x0;
480 double shift_y = bbox.y1;
481 if (res == PX_PER_IN) { // for default 90 dpi, snap it to pixel grid
482 shift_x = round (shift_x);
483 shift_y = -round (-shift_y); // this gets correct rounding despite coordinate inversion, remove the negations when the inversion is gone
484 }
485 t = (NR::Matrix)(NR::scale(1, -1) * (NR::Matrix)(NR::translate (shift_x, shift_y)* eek.inverse()));
487 //t = t * ((NR::Matrix)ctx->getCurrentState()->transform).inverse();
489 // Do the export
490 GdkPixbuf *pb = sp_generate_internal_bitmap(document, NULL,
491 bbox.x0, bbox.y0, bbox.x1, bbox.y1, width, height, res, res, (guint32) 0xffffff00, items );
493 // Run filter, if any
494 /*
495 if (run) {
496 g_print ("Running external filter: %s\n", run);
497 system (run);
498 }
499 */
500 if (pb) {
501 unsigned char *px = gdk_pixbuf_get_pixels (pb);
502 unsigned int w = gdk_pixbuf_get_width(pb);
503 unsigned int h = gdk_pixbuf_get_height(pb);
504 unsigned int rs = gdk_pixbuf_get_rowstride(pb);
505 NR::Matrix matrix;
506 matrix = t;
507 //matrix = ((NR::Matrix)ctx->getCurrentState()->transform).inverse();
508 //matrix.set_identity();
510 ctx->renderImage (px, w, h, rs, &matrix, SP_OBJECT_STYLE (item));
511 /*
512 // Create the repr for the image
513 Inkscape::XML::Node * repr = xml_doc->createElement("svg:image");
514 repr->setAttribute("xlink:href", filename);
515 repr->setAttribute("sodipodi:absref", filepath);
516 if (res == PX_PER_IN) { // for default 90 dpi, snap it to pixel grid
517 sp_repr_set_svg_double(repr, "width", width);
518 sp_repr_set_svg_double(repr, "height", height);
519 } else {
520 sp_repr_set_svg_double(repr, "width", (bbox.x1 - bbox.x0));
521 sp_repr_set_svg_double(repr, "height", (bbox.y1 - bbox.y0));
522 }
524 // Write transform
525 gchar *c=sp_svg_transform_write(t);
526 repr->setAttribute("transform", c);
527 g_free(c);
529 // add the new repr to the parent
530 parent->appendChild(repr);
532 // move to the saved position
533 repr->setPosition(pos > 0 ? pos + 1 : 1);
534 */
535 gdk_pixbuf_unref (pb);
536 }
537 g_slist_free (items);
538 }
540 static void sp_item_invoke_render(SPItem *item, CairoRenderContext *ctx)
541 {
542 // Check item's visibility
543 if (item->isHidden()) {
544 return;
545 }
547 SPStyle* style = SP_OBJECT_STYLE (item);
548 if((ctx->getFilterToBitmap() == TRUE) && (style->filter.set != 0)) {
549 return sp_asbitmap_render(item, ctx);
550 }
552 if (SP_IS_ROOT(item)) {
553 TRACE(("root\n"));
554 return sp_root_render(item, ctx);
555 } else if (SP_IS_GROUP(item)) {
556 TRACE(("group\n"));
557 return sp_group_render(item, ctx);
558 } else if (SP_IS_SHAPE(item)) {
559 TRACE(("shape\n"));
560 return sp_shape_render(item, ctx);
561 } else if (SP_IS_USE(item)) {
562 TRACE(("use begin---\n"));
563 sp_use_render(item, ctx);
564 TRACE(("---use end\n"));
565 } else if (SP_IS_SYMBOL(item)) {
566 TRACE(("symbol\n"));
567 return sp_symbol_render(item, ctx);
568 } else if (SP_IS_TEXT(item)) {
569 TRACE(("text\n"));
570 return sp_text_render(item, ctx);
571 } else if (SP_IS_FLOWTEXT(item)) {
572 TRACE(("flowtext\n"));
573 return sp_flowtext_render(item, ctx);
574 } else if (SP_IS_IMAGE(item)) {
575 TRACE(("image\n"));
576 return sp_image_render(item, ctx);
577 }
578 }
580 void
581 CairoRenderer::setStateForItem(CairoRenderContext *ctx, SPItem const *item)
582 {
583 SPStyle const *style = SP_OBJECT_STYLE(item);
584 ctx->setStateForStyle(style);
586 CairoRenderState *state = ctx->getCurrentState();
587 state->clip_path = item->clip_ref->getObject();
588 state->mask = item->mask_ref->getObject();
590 // If parent_has_userspace is true the parent state's transform
591 // has to be used for the mask's/clippath's context.
592 // This is so because we use the image's/(flow)text's transform for positioning
593 // instead of explicitly specifying it and letting the renderer do the
594 // transformation before rendering the item.
595 if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item) || SP_IS_IMAGE(item))
596 state->parent_has_userspace = TRUE;
597 TRACE(("set op: %f\n", state->opacity));
598 }
600 void
601 CairoRenderer::renderItem(CairoRenderContext *ctx, SPItem *item)
602 {
603 ctx->pushState();
604 setStateForItem(ctx, item);
606 CairoRenderState *state = ctx->getCurrentState();
607 state->need_layer = ( state->mask || state->clip_path || state->opacity != 1.0 );
609 if (state->need_layer) {
610 state->merge_opacity = FALSE;
611 ctx->pushLayer();
612 }
613 ctx->transform(&item->transform);
614 sp_item_invoke_render(item, ctx);
616 if (state->need_layer)
617 ctx->popLayer();
619 ctx->popState();
620 }
622 bool
623 CairoRenderer::setupDocument(CairoRenderContext *ctx, SPDocument *doc)
624 {
625 g_assert( ctx != NULL );
627 if (ctx->_vector_based_target) {
628 // width and height in pt
629 ctx->_width = sp_document_width(doc) * PT_PER_PX;
630 ctx->_height = sp_document_height(doc) * PT_PER_PX;
631 } else {
632 ctx->_width = sp_document_width(doc);
633 ctx->_height = sp_document_height(doc);
634 }
636 NRRect d;
637 bool pageBoundingBox = true;
638 if (pageBoundingBox) {
639 d.x0 = d.y0 = 0;
640 d.x1 = ceil(ctx->_width);
641 d.y1 = ceil(ctx->_height);
642 } else {
643 SPItem* doc_item = SP_ITEM(sp_document_root(doc));
644 sp_item_invoke_bbox(doc_item, &d, from_2geom(sp_item_i2r_affine(doc_item)), TRUE);
645 if (ctx->_vector_based_target) {
646 // convert from px to pt
647 d.x0 *= PT_PER_PX;
648 d.x1 *= PT_PER_PX;
649 d.y0 *= PT_PER_PX;
650 d.y1 *= PT_PER_PX;
651 }
652 }
653 TRACE(("%f x %f\n", ctx->_width, ctx->_height));
655 return ctx->setupSurface(d.x1-d.x0, d.y1-d.y0);
656 }
658 #include "macros.h" // SP_PRINT_*
660 void
661 CairoRenderer::applyClipPath(CairoRenderContext *ctx, SPClipPath const *cp)
662 {
663 g_assert( ctx != NULL && ctx->_is_valid );
665 if (cp == NULL)
666 return;
668 CairoRenderContext::CairoRenderMode saved_mode = ctx->getRenderMode();
669 ctx->setRenderMode(CairoRenderContext::RENDER_MODE_CLIP);
671 NR::Matrix saved_ctm;
672 if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
673 //SP_PRINT_DRECT("clipd", cp->display->bbox);
674 NRRect clip_bbox(cp->display->bbox);
675 NR::Matrix t(NR::scale(clip_bbox.x1 - clip_bbox.x0, clip_bbox.y1 - clip_bbox.y0));
676 t[4] = clip_bbox.x0;
677 t[5] = clip_bbox.y0;
678 t *= ctx->getCurrentState()->transform;
679 ctx->getTransform(&saved_ctm);
680 ctx->setTransform(&t);
681 }
683 TRACE(("BEGIN clip\n"));
684 SPObject *co = SP_OBJECT(cp);
685 for (SPObject *child = sp_object_first_child(co) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
686 if (SP_IS_ITEM(child)) {
687 SPItem *item = SP_ITEM(child);
688 renderItem(ctx, item);
689 }
690 }
691 TRACE(("END clip\n"));
693 // do clipping only if this was the first call to applyClipPath
694 if (ctx->getClipMode() == CairoRenderContext::CLIP_MODE_PATH
695 && saved_mode == CairoRenderContext::RENDER_MODE_NORMAL)
696 cairo_clip(ctx->_cr);
698 if (cp->clipPathUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX)
699 ctx->setTransform(&saved_ctm);
701 ctx->setRenderMode(saved_mode);
702 }
704 void
705 CairoRenderer::applyMask(CairoRenderContext *ctx, SPMask const *mask)
706 {
707 g_assert( ctx != NULL && ctx->_is_valid );
709 if (mask == NULL)
710 return;
712 //SP_PRINT_DRECT("maskd", &mask->display->bbox);
713 NRRect mask_bbox(mask->display->bbox);
714 // TODO: should the bbox be transformed if maskUnits != userSpaceOnUse ?
715 if (mask->maskContentUnits == SP_CONTENT_UNITS_OBJECTBOUNDINGBOX) {
716 NR::Matrix t(NR::scale(mask_bbox.x1 - mask_bbox.x0, mask_bbox.y1 - mask_bbox.y0));
717 t[4] = mask_bbox.x0;
718 t[5] = mask_bbox.y0;
719 t *= ctx->getCurrentState()->transform;
720 ctx->setTransform(&t);
721 }
723 // clip mask contents
724 ctx->addClippingRect(mask_bbox.x0, mask_bbox.y0, mask_bbox.x1 - mask_bbox.x0, mask_bbox.y1 - mask_bbox.y0);
726 ctx->pushState();
728 TRACE(("BEGIN mask\n"));
729 SPObject *co = SP_OBJECT(mask);
730 for (SPObject *child = sp_object_first_child(co) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
731 if (SP_IS_ITEM(child)) {
732 SPItem *item = SP_ITEM(child);
733 renderItem(ctx, item);
734 }
735 }
736 TRACE(("END mask\n"));
738 ctx->popState();
739 }
741 void
742 calculatePreserveAspectRatio(unsigned int aspect_align, unsigned int aspect_clip, double vp_width, double vp_height,
743 double *x, double *y, double *width, double *height)
744 {
745 if (aspect_align == SP_ASPECT_NONE)
746 return;
748 double scalex, scaley, scale;
749 double new_width, new_height;
750 scalex = *width / vp_width;
751 scaley = *height / vp_height;
752 scale = (aspect_clip == SP_ASPECT_MEET) ? MIN(scalex, scaley) : MAX(scalex, scaley);
753 new_width = vp_width * scale;
754 new_height = vp_height * scale;
755 /* Now place viewbox to requested position */
756 switch (aspect_align) {
757 case SP_ASPECT_XMIN_YMIN:
758 break;
759 case SP_ASPECT_XMID_YMIN:
760 *x -= 0.5 * (new_width - *width);
761 break;
762 case SP_ASPECT_XMAX_YMIN:
763 *x -= 1.0 * (new_width - *width);
764 break;
765 case SP_ASPECT_XMIN_YMID:
766 *y -= 0.5 * (new_height - *height);
767 break;
768 case SP_ASPECT_XMID_YMID:
769 *x -= 0.5 * (new_width - *width);
770 *y -= 0.5 * (new_height - *height);
771 break;
772 case SP_ASPECT_XMAX_YMID:
773 *x -= 1.0 * (new_width - *width);
774 *y -= 0.5 * (new_height - *height);
775 break;
776 case SP_ASPECT_XMIN_YMAX:
777 *y -= 1.0 * (new_height - *height);
778 break;
779 case SP_ASPECT_XMID_YMAX:
780 *x -= 0.5 * (new_width - *width);
781 *y -= 1.0 * (new_height - *height);
782 break;
783 case SP_ASPECT_XMAX_YMAX:
784 *x -= 1.0 * (new_width - *width);
785 *y -= 1.0 * (new_height - *height);
786 break;
787 default:
788 break;
789 }
790 *width = new_width;
791 *height = new_height;
792 }
794 #include "clear-n_.h"
796 } /* namespace Internal */
797 } /* namespace Extension */
798 } /* namespace Inkscape */
800 #undef TRACE
802 /* End of GNU GPL code */
804 /*
805 Local Variables:
806 mode:c++
807 c-file-style:"stroustrup"
808 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
809 indent-tabs-mode:nil
810 fill-column:99
811 End:
812 */
813 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :