Code

a040d5c099c387a9f0bce9ccc2d59abc1f52675c
[inkscape.git] / src / extension / internal / cairo-render-context.cpp
1 #define __SP_CAIRO_RENDER_CONTEXT_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-scale-ops.h>
35 #include <libnr/nr-matrix-translate-ops.h>
36 #include <libnr/nr-scale-matrix-ops.h>
38 #include <glib/gmem.h>
40 #include <glibmm/i18n.h>
41 #include "display/nr-arena.h"
42 #include "display/nr-arena-item.h"
43 #include "display/nr-arena-group.h"
44 #include "display/curve.h"
45 #include "display/canvas-bpath.h"
46 #include "sp-item.h"
47 #include "sp-item-group.h"
48 #include "style.h"
49 #include "sp-linear-gradient.h"
50 #include "sp-radial-gradient.h"
51 #include "sp-pattern.h"
52 #include "sp-mask.h"
53 #include "sp-clippath.h"
55 #include <unit-constants.h>
57 #include "cairo-render-context.h"
58 #include "cairo-renderer.h"
59 #include "extension/system.h"
61 #include "io/sys.h"
63 #include <cairo.h>
65 // include support for only the compiled-in surface types
66 #ifdef CAIRO_HAS_PDF_SURFACE
67 #include <cairo-pdf.h>
68 #endif
69 #ifdef CAIRO_HAS_PS_SURFACE
70 #include <cairo-ps.h>
71 #endif
74 #ifdef CAIRO_HAS_FT_FONT
75 #include <cairo-ft.h>
76 #endif
78 #include <pango/pangofc-fontmap.h>
80 //#define TRACE(_args) g_printf _args
81 #define TRACE(_args)
82 //#define TEST(_args) _args
83 #define TEST(_args)
85 // FIXME: expose these from sp-clippath/mask.cpp
86 struct SPClipPathView {
87     SPClipPathView *next;
88     unsigned int key;
89     NRArenaItem *arenaitem;
90     NRRect bbox;
91 };
93 struct SPMaskView {
94     SPMaskView *next;
95     unsigned int key;
96     NRArenaItem *arenaitem;
97     NRRect bbox;
98 };
100 namespace Inkscape {
101 namespace Extension {
102 namespace Internal {
104 static cairo_status_t _write_callback(void *closure, const unsigned char *data, unsigned int length);
106 CairoRenderContext::CairoRenderContext(CairoRenderer *parent) :
107     _dpi(72),
108     _pdf_level(0),
109     _ps_level(1),
110     _is_texttopath(FALSE),
111     _is_filtertobitmap(FALSE),
112     _bitmapresolution(72),
113     _stream(NULL),
114     _is_valid(FALSE),
115     _vector_based_target(FALSE),
116     _cr(NULL),
117     _surface(NULL),
118     _target(CAIRO_SURFACE_TYPE_IMAGE),
119     _target_format(CAIRO_FORMAT_ARGB32),
120     _layout(NULL),
121     _state(NULL),
122     _renderer(parent),
123     _render_mode(RENDER_MODE_NORMAL),
124     _clip_mode(CLIP_MODE_MASK)
125 {}
127 CairoRenderContext::~CairoRenderContext(void)
129     if (_cr) cairo_destroy(_cr);
130     if (_surface) cairo_surface_destroy(_surface);
131     if (_layout) g_object_unref(_layout);
134 CairoRenderer*
135 CairoRenderContext::getRenderer(void) const
137     return _renderer;
140 CairoRenderState*
141 CairoRenderContext::getCurrentState(void) const
143     return _state;
146 CairoRenderState*
147 CairoRenderContext::getParentState(void) const
149     // if this is the root node just return it
150     if (g_slist_length(_state_stack) == 1) {
151         return _state;
152     } else {
153         return (CairoRenderState *)g_slist_nth_data(_state_stack, 1);
154     }
157 void
158 CairoRenderContext::setStateForStyle(SPStyle const *style)
160     // only opacity & overflow is stored for now
161     _state->opacity = SP_SCALE24_TO_FLOAT(style->opacity.value);
162     _state->has_overflow = (style->overflow.set && style->overflow.value != SP_CSS_OVERFLOW_VISIBLE);
163     _state->has_filtereffect = (style->filter.set != 0) ? TRUE : FALSE;
165     if (style->fill.isPaintserver() || style->stroke.isPaintserver())
166         _state->merge_opacity = FALSE;
168     // disable rendering of opacity if there's a stroke on the fill
169     if (_state->merge_opacity
170         && !style->fill.isNone()
171         && !style->stroke.isNone())
172         _state->merge_opacity = FALSE;
175 /**
176  * \brief Creates a new render context which will be compatible with the given context's Cairo surface
177  *
178  * \param width     width of the surface to be created
179  * \param height    height of the surface to be created
180  */
181 CairoRenderContext*
182 CairoRenderContext::cloneMe(double width, double height) const
184     g_assert( _is_valid );
185     g_assert( width > 0.0 && height > 0.0 );
187     CairoRenderContext *new_context = _renderer->createContext();
188     cairo_surface_t *surface = cairo_surface_create_similar(cairo_get_target(_cr), CAIRO_CONTENT_COLOR_ALPHA,
189                                                             (int)ceil(width), (int)ceil(height));
190     new_context->_cr = cairo_create(surface);
191     new_context->_surface = surface;
192     new_context->_is_valid = TRUE;
194     return new_context;
197 CairoRenderContext*
198 CairoRenderContext::cloneMe(void) const
200     g_assert( _is_valid );
202     return cloneMe(_width, _height);
205 bool
206 CairoRenderContext::setImageTarget(cairo_format_t format)
208     // format cannot be set on an already initialized surface
209     if (_is_valid)
210         return false;
212     switch (format) {
213         case CAIRO_FORMAT_ARGB32:
214         case CAIRO_FORMAT_RGB24:
215         case CAIRO_FORMAT_A8:
216         case CAIRO_FORMAT_A1:
217             _target_format = format;
218             _target = CAIRO_SURFACE_TYPE_IMAGE;
219             return true;
220             break;
221         default:
222             break;
223     }
225     return false;
228 bool
229 CairoRenderContext::setPdfTarget(gchar const *utf8_fn)
231 #ifndef CAIRO_HAS_PDF_SURFACE
232     return false;
233 #else
234     _target = CAIRO_SURFACE_TYPE_PDF;
235     _vector_based_target = TRUE;
236 #endif
238     FILE *osf = NULL;
239     FILE *osp = NULL;
241     gsize bytesRead = 0;
242     gsize bytesWritten = 0;
243     GError *error = NULL;
244     gchar *local_fn = g_filename_from_utf8(utf8_fn,
245                                            -1,  &bytesRead,  &bytesWritten, &error);
246     gchar const *fn = local_fn;
248     /* TODO: Replace the below fprintf's with something that does the right thing whether in
249     * gui or batch mode (e.g. --print=blah).  Consider throwing an exception: currently one of
250     * the callers (sp_print_document_to_file, "ret = mod->begin(doc)") wrongly ignores the
251     * return code.
252     */
253     if (fn != NULL) {
254         if (*fn == '|') {
255             fn += 1;
256             while (isspace(*fn)) fn += 1;
257 #ifndef WIN32
258             osp = popen(fn, "w");
259 #else
260             osp = _popen(fn, "w");
261 #endif
262             if (!osp) {
263                 fprintf(stderr, "inkscape: popen(%s): %s\n",
264                         fn, strerror(errno));
265                 return false;
266             }
267             _stream = osp;
268         } else if (*fn == '>') {
269             fn += 1;
270             while (isspace(*fn)) fn += 1;
271             Inkscape::IO::dump_fopen_call(fn, "K");
272             osf = Inkscape::IO::fopen_utf8name(fn, "w+");
273             if (!osf) {
274                 fprintf(stderr, "inkscape: fopen(%s): %s\n",
275                         fn, strerror(errno));
276                 return false;
277             }
278             _stream = osf;
279         } else {
280             /* put cwd stuff in here */
281             gchar *qn = ( *fn
282                     ? g_strdup_printf("lpr -P %s", fn)  /* FIXME: quote fn */
283                 : g_strdup("lpr") );
284 #ifndef WIN32
285             osp = popen(qn, "w");
286 #else
287             osp = _popen(qn, "w");
288 #endif
289             if (!osp) {
290                 fprintf(stderr, "inkscape: popen(%s): %s\n",
291                         qn, strerror(errno));
292                 return false;
293             }
294             g_free(qn);
295             _stream = osp;
296         }
297     }
299     g_free(local_fn);
301     if (_stream) {
302         /* fixme: this is kinda icky */
303 #if !defined(_WIN32) && !defined(__WIN32__)
304         (void) signal(SIGPIPE, SIG_IGN);
305 #endif
306     }
308     return true;
311 bool
312 CairoRenderContext::setPsTarget(gchar const *utf8_fn)
314 #ifndef CAIRO_HAS_PS_SURFACE
315     return false;
316 #else
317     _target = CAIRO_SURFACE_TYPE_PS;
318     _vector_based_target = TRUE;
319 #endif
321     FILE *osf = NULL;
322     FILE *osp = NULL;
324     gsize bytesRead = 0;
325     gsize bytesWritten = 0;
326     GError *error = NULL;
327     gchar *local_fn = g_filename_from_utf8(utf8_fn,
328                                            -1,  &bytesRead,  &bytesWritten, &error);
329     gchar const *fn = local_fn;
331     /* TODO: Replace the below fprintf's with something that does the right thing whether in
332     * gui or batch mode (e.g. --print=blah).  Consider throwing an exception: currently one of
333     * the callers (sp_print_document_to_file, "ret = mod->begin(doc)") wrongly ignores the
334     * return code.
335     */
336     if (fn != NULL) {
337         if (*fn == '|') {
338             fn += 1;
339             while (isspace(*fn)) fn += 1;
340 #ifndef WIN32
341             osp = popen(fn, "w");
342 #else
343             osp = _popen(fn, "w");
344 #endif
345             if (!osp) {
346                 fprintf(stderr, "inkscape: popen(%s): %s\n",
347                         fn, strerror(errno));
348                 return false;
349             }
350             _stream = osp;
351         } else if (*fn == '>') {
352             fn += 1;
353             while (isspace(*fn)) fn += 1;
354             Inkscape::IO::dump_fopen_call(fn, "K");
355             osf = Inkscape::IO::fopen_utf8name(fn, "w+");
356             if (!osf) {
357                 fprintf(stderr, "inkscape: fopen(%s): %s\n",
358                         fn, strerror(errno));
359                 return false;
360             }
361             _stream = osf;
362         } else {
363             /* put cwd stuff in here */
364             gchar *qn = ( *fn
365                     ? g_strdup_printf("lpr -P %s", fn)  /* FIXME: quote fn */
366                 : g_strdup("lpr") );
367 #ifndef WIN32
368             osp = popen(qn, "w");
369 #else
370             osp = _popen(qn, "w");
371 #endif
372             if (!osp) {
373                 fprintf(stderr, "inkscape: popen(%s): %s\n",
374                         qn, strerror(errno));
375                 return false;
376             }
377             g_free(qn);
378             _stream = osp;
379         }
380     }
382     g_free(local_fn);
384     if (_stream) {
385         /* fixme: this is kinda icky */
386 #if !defined(_WIN32) && !defined(__WIN32__)
387         (void) signal(SIGPIPE, SIG_IGN);
388 #endif
389     }
391     return true;
394 void CairoRenderContext::setPSLevel(unsigned int level)
396     _ps_level = level;
399 unsigned int CairoRenderContext::getPSLevel(void)
401     return _ps_level;
404 void CairoRenderContext::setPDFLevel(unsigned int level)
406     _pdf_level = level;
409 void CairoRenderContext::setTextToPath(bool texttopath)
411     _is_texttopath = texttopath;
414 void CairoRenderContext::setFilterToBitmap(bool filtertobitmap)
416     _is_filtertobitmap = filtertobitmap;
419 bool CairoRenderContext::getFilterToBitmap(void)
421     return _is_filtertobitmap;
424 void CairoRenderContext::setBitmapResolution(int resolution)
426     _bitmapresolution = resolution;
429 int CairoRenderContext::getBitmapResolution(void)
431     return _bitmapresolution;
434 cairo_surface_t*
435 CairoRenderContext::getSurface(void)
437     g_assert( _is_valid );
439     return _surface;
442 bool
443 CairoRenderContext::saveAsPng(const char *file_name)
445     cairo_status_t status = cairo_surface_write_to_png(_surface, file_name);
446     if (status)
447         return false;
448     else
449         return true;
452 void
453 CairoRenderContext::setRenderMode(CairoRenderMode mode)
455     switch (mode) {
456         case RENDER_MODE_NORMAL:
457         case RENDER_MODE_CLIP:
458             _render_mode = mode;
459             break;
460         default:
461             _render_mode = RENDER_MODE_NORMAL;
462             break;
463     }
466 CairoRenderContext::CairoRenderMode
467 CairoRenderContext::getRenderMode(void) const
469     return _render_mode;
472 void
473 CairoRenderContext::setClipMode(CairoClipMode mode)
475     switch (mode) {
476         case CLIP_MODE_PATH:
477         case CLIP_MODE_MASK:
478             _clip_mode = mode;
479             break;
480         default:
481             _clip_mode = CLIP_MODE_PATH;
482             break;
483     }
486 CairoRenderContext::CairoClipMode
487 CairoRenderContext::getClipMode(void) const
489     return _clip_mode;
492 CairoRenderState*
493 CairoRenderContext::_createState(void)
495     CairoRenderState *state = (CairoRenderState*)g_malloc(sizeof(CairoRenderState));
496     g_assert( state != NULL );
498     state->has_filtereffect = FALSE;
499     state->merge_opacity = TRUE;
500     state->opacity = 1.0;
501     state->need_layer = FALSE;
502     state->has_overflow = FALSE;
503     state->parent_has_userspace = FALSE;
504     state->clip_path = NULL;
505     state->mask = NULL;
507     return state;
510 void
511 CairoRenderContext::pushLayer(void)
513     g_assert( _is_valid );
515     TRACE(("--pushLayer\n"));
516     cairo_push_group(_cr);
518     // clear buffer
519     if (!_vector_based_target) {
520         cairo_save(_cr);
521         cairo_set_operator(_cr, CAIRO_OPERATOR_CLEAR);
522         cairo_paint(_cr);
523         cairo_restore(_cr);
524     }
527 void
528 CairoRenderContext::popLayer(void)
530     g_assert( _is_valid );
532     float opacity = _state->opacity;
533     TRACE(("--popLayer w/ %f\n", opacity));
535     // apply clipPath or mask if present
536     SPClipPath *clip_path = _state->clip_path;
537     SPMask *mask = _state->mask;
538     if (clip_path || mask) {
540         CairoRenderContext *clip_ctx = 0;
541         cairo_surface_t *clip_mask = 0;
543         if (clip_path) {
544             if (_render_mode == RENDER_MODE_CLIP)
545                 mask = NULL;    // disable mask when performing nested clipping
547             if (_vector_based_target) {
548                 setClipMode(CLIP_MODE_PATH);
549                 if (!mask) {
550                     cairo_pop_group_to_source(_cr);
551                     _renderer->applyClipPath(this, clip_path);
552                     if (opacity == 1.0)
553                         cairo_paint(_cr);
554                     else
555                         cairo_paint_with_alpha(_cr, opacity);
557                 } else {
558                     // the clipPath will be applied before masking
559                 }
560             } else {
562                 // setup a new rendering context
563                 clip_ctx = _renderer->createContext();
564                 clip_ctx->setImageTarget(CAIRO_FORMAT_A8);
565                 clip_ctx->setClipMode(CLIP_MODE_MASK);
566                 if (!clip_ctx->setupSurface(_width, _height)) {
567                     TRACE(("setupSurface failed\n"));
568                     _renderer->destroyContext(clip_ctx);
569                     return;
570                 }
572                 // clear buffer
573                 cairo_save(clip_ctx->_cr);
574                 cairo_set_operator(clip_ctx->_cr, CAIRO_OPERATOR_CLEAR);
575                 cairo_paint(clip_ctx->_cr);
576                 cairo_restore(clip_ctx->_cr);
578                 // if a mask won't be applied set opacity too
579                 if (!mask)
580                     cairo_set_source_rgba(clip_ctx->_cr, 1.0, 1.0, 1.0, opacity);
581                 else
582                     cairo_set_source_rgba(clip_ctx->_cr, 1.0, 1.0, 1.0, 1.0);
584                 // copy over the correct CTM
585                 if (_state->parent_has_userspace)
586                     clip_ctx->setTransform(&getParentState()->transform);
587                 else
588                     clip_ctx->setTransform(&_state->transform);
590                 // apply the clip path
591                 clip_ctx->pushState();
592                 _renderer->applyClipPath(clip_ctx, clip_path);
593                 clip_ctx->popState();
595                 clip_mask = clip_ctx->getSurface();
596                 TEST(clip_ctx->saveAsPng("clip_mask.png"));
598                 if (!mask) {
599                     cairo_pop_group_to_source(_cr);
600                     cairo_mask_surface(_cr, clip_mask, 0, 0);
601                     _renderer->destroyContext(clip_ctx);
602                 }
603             }
604         }
606         if (mask) {
607             // create rendering context for mask
608             CairoRenderContext *mask_ctx = _renderer->createContext();
609             mask_ctx->setupSurface(_width, _height);
611             // set rendering mode to normal
612             setRenderMode(RENDER_MODE_NORMAL);
614             // copy the correct CTM to mask context
615             if (_state->parent_has_userspace)
616                 mask_ctx->setTransform(&getParentState()->transform);
617             else
618                 mask_ctx->setTransform(&_state->transform);
620             // render mask contents to mask_ctx
621             _renderer->applyMask(mask_ctx, mask);
623             TEST(mask_ctx->saveAsPng("mask.png"));
625             // composite with clip mask
626             if (clip_path && _clip_mode == CLIP_MODE_MASK) {
627                 cairo_mask_surface(mask_ctx->_cr, clip_mask, 0, 0);
628                 _renderer->destroyContext(clip_ctx);
629             }
631             cairo_surface_t *mask_image = mask_ctx->getSurface();
632             int width = cairo_image_surface_get_width(mask_image);
633             int height = cairo_image_surface_get_height(mask_image);
634             int stride = cairo_image_surface_get_stride(mask_image);
635             unsigned char *pixels = cairo_image_surface_get_data(mask_image);
637             // premultiply with opacity
638             if (_state->opacity != 1.0) {
639                 TRACE(("premul w/ %f\n", opacity));
640                 guint8 int_opacity = (guint8)(255 * opacity);
641                 for (int row = 0 ; row < height; row++) {
642                     unsigned char *row_data = pixels + (row * stride);
643                     for (int i = 0 ; i < width; i++) {
644                         guint32 *pixel = (guint32 *)row_data + i;
645                         *pixel = ((((*pixel & 0x00ff0000) >> 16) * 13817 +
646                                 ((*pixel & 0x0000ff00) >>  8) * 46518 +
647                                 ((*pixel & 0x000000ff)      ) * 4688) *
648                                 int_opacity);
649                     }
650                 }
651             }
653             cairo_pop_group_to_source(_cr);
654             if (_clip_mode == CLIP_MODE_PATH) {
655                 // we have to do the clipping after cairo_pop_group_to_source
656                 _renderer->applyClipPath(this, clip_path);
657             }
658             // apply the mask onto the layer
659             cairo_mask_surface(_cr, mask_image, 0, 0);
660             _renderer->destroyContext(mask_ctx);
661         }
662     } else {
663         cairo_pop_group_to_source(_cr);
664         if (opacity == 1.0)
665             cairo_paint(_cr);
666         else
667             cairo_paint_with_alpha(_cr, opacity);
668     }
671 void
672 CairoRenderContext::addClipPath(NArtBpath const *bp, SPIEnum const *fill_rule)
674     g_assert( _is_valid );
676     // here it should be checked whether the current clip winding changed
677     // so we could switch back to masked clipping
678     if (fill_rule->value == SP_WIND_RULE_EVENODD) {
679         cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);
680     } else {
681         cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);
682     }
683     addBpath(bp);
686 void
687 CairoRenderContext::addClippingRect(double x, double y, double width, double height)
689     g_assert( _is_valid );
691     cairo_rectangle(_cr, x, y, width, height);
692     cairo_clip(_cr);
695 bool
696 CairoRenderContext::setupSurface(double width, double height)
698     // Is the surface already set up?
699     if (_is_valid)
700         return true;
702     if (_vector_based_target && _stream == NULL)
703         return false;
705     cairo_surface_t *surface = NULL;
706     switch (_target) {
707         case CAIRO_SURFACE_TYPE_IMAGE:
708             surface = cairo_image_surface_create(_target_format, (int)ceil(width), (int)ceil(height));
709             break;
710 #ifdef CAIRO_HAS_PDF_SURFACE
711         case CAIRO_SURFACE_TYPE_PDF:
712             surface = cairo_pdf_surface_create_for_stream(Inkscape::Extension::Internal::_write_callback, _stream, width, height);
713             break;
714 #endif
715 #ifdef CAIRO_HAS_PS_SURFACE
716         case CAIRO_SURFACE_TYPE_PS:
717             surface = cairo_ps_surface_create_for_stream(Inkscape::Extension::Internal::_write_callback, _stream, width, height);
718 #if (CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 5, 2))
719             if(CAIRO_STATUS_SUCCESS != cairo_surface_status(surface)) {
720                 return FALSE;
721             }
722             cairo_ps_surface_restrict_to_level (surface, (cairo_ps_level_t)_ps_level);
723 #endif
724             break;
725 #endif
726         default:
727             return false;
728             break;
729     }
731     return _finishSurfaceSetup (surface);
734 bool
735 CairoRenderContext::setSurfaceTarget(cairo_surface_t *surface, bool is_vector)
737     if (_is_valid || !surface)
738         return false;
740     _vector_based_target = is_vector;
741     bool ret = _finishSurfaceSetup (surface);
742     if (ret)
743         cairo_surface_reference (surface);
744     return ret;
747 bool
748 CairoRenderContext::_finishSurfaceSetup(cairo_surface_t *surface)
750     if(surface == NULL) {
751         return FALSE;
752     }
753     if(CAIRO_STATUS_SUCCESS != cairo_surface_status(surface)) {
754         return FALSE;
755     }
757     _cr = cairo_create(surface);
758     _surface = surface;
760     if (_vector_based_target) {
761         cairo_scale(_cr, PT_PER_PX, PT_PER_PX);
762     } else if (cairo_surface_get_content(_surface) != CAIRO_CONTENT_ALPHA) {
763         // set background color on non-alpha surfaces
764         // TODO: bgcolor should be derived from SPDocument
765         cairo_set_source_rgb(_cr, 1.0, 1.0, 1.0);
766         cairo_rectangle(_cr, 0, 0, _width, _height);
767         cairo_fill(_cr);
768     }
770     _is_valid = TRUE;
772     return true;
775 bool
776 CairoRenderContext::finish(void)
778     g_assert( _is_valid );
780     if (_vector_based_target)
781         cairo_show_page(_cr);
783     cairo_destroy(_cr);
784     cairo_surface_destroy(_surface);
785     _cr = NULL;
786     _surface = NULL;
788     if (_layout)
789         g_object_unref(_layout);
791     _is_valid = FALSE;
793     if (_vector_based_target && _stream) {
794         /* Flush stream to be sure. */
795         (void) fflush(_stream);
797         fclose(_stream);
798         _stream = NULL;
799     }
801     return true;
804 void
805 CairoRenderContext::transform(NR::Matrix const *transform)
807     g_assert( _is_valid );
809     cairo_matrix_t matrix;
810     _initCairoMatrix(&matrix, transform);
811     cairo_transform(_cr, &matrix);
813     // store new CTM
814     getTransform(&_state->transform);
817 void
818 CairoRenderContext::setTransform(NR::Matrix const *transform)
820     g_assert( _is_valid );
822     cairo_matrix_t matrix;
823     _initCairoMatrix(&matrix, transform);
824     cairo_set_matrix(_cr, &matrix);
825     _state->transform = *transform;
828 void
829 CairoRenderContext::getTransform(NR::Matrix *copy) const
831     g_assert( _is_valid );
833     cairo_matrix_t ctm;
834     cairo_get_matrix(_cr, &ctm);
835     (*copy)[0] = ctm.xx;
836     (*copy)[1] = ctm.yx;
837     (*copy)[2] = ctm.xy;
838     (*copy)[3] = ctm.yy;
839     (*copy)[4] = ctm.x0;
840     (*copy)[5] = ctm.y0;
843 void
844 CairoRenderContext::getParentTransform(NR::Matrix *copy) const
846     g_assert( _is_valid );
848     CairoRenderState *parent_state = getParentState();
849     memcpy(copy, &parent_state->transform, sizeof(NR::Matrix));
852 void
853 CairoRenderContext::pushState(void)
855     g_assert( _is_valid );
857     cairo_save(_cr);
859     CairoRenderState *new_state = _createState();
860     // copy current state's transform
861     new_state->transform = _state->transform;
862     _state_stack = g_slist_prepend(_state_stack, new_state);
863     _state = new_state;
866 void
867 CairoRenderContext::popState(void)
869     g_assert( _is_valid );
871     cairo_restore(_cr);
873     g_free(_state_stack->data);
874     _state_stack = g_slist_remove_link(_state_stack, _state_stack);
875     _state = (CairoRenderState*)_state_stack->data;
877     g_assert( g_slist_length(_state_stack) > 0 );
880 static bool pattern_hasItemChildren (SPPattern *pat)
882     for (SPObject *child = sp_object_first_child(SP_OBJECT(pat)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
883         if (SP_IS_ITEM (child)) {
884             return true;
885         }
886     }
887     return false;
890 cairo_pattern_t*
891 CairoRenderContext::_createPatternPainter(SPPaintServer const *const paintserver, NRRect const *pbox)
893     g_assert( SP_IS_PATTERN(paintserver) );
895     SPPattern *pat = SP_PATTERN (paintserver);
897     NR::Matrix ps2user, pcs2dev;
898     ps2user.set_identity();
899     pcs2dev.set_identity();
901     double x = pattern_x(pat);
902     double y = pattern_y(pat);
903     double width = pattern_width(pat);
904     double height = pattern_height(pat);
905     double bbox_width_scaler;
906     double bbox_height_scaler;
908     TRACE(("%f x %f pattern\n", width, height));
910     if (pbox && pattern_patternUnits(pat) == SP_PATTERN_UNITS_OBJECTBOUNDINGBOX) {
911         //NR::Matrix bbox2user (pbox->x1 - pbox->x0, 0.0, 0.0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);
912         bbox_width_scaler = pbox->x1 - pbox->x0;
913         bbox_height_scaler = pbox->y1 - pbox->y0;
914         ps2user[4] = x * bbox_width_scaler + pbox->x0;
915         ps2user[5] = y * bbox_height_scaler + pbox->y0;
916     } else {
917         bbox_width_scaler = 1.0;
918         bbox_height_scaler = 1.0;
919         ps2user[4] = x;
920         ps2user[5] = y;
921     }
923     // apply pattern transformation
924     NR::Matrix pattern_transform(pattern_patternTransform(pat));
925     ps2user *= pattern_transform;
927     // create pattern contents coordinate system
928     if (pat->viewBox_set) {
929         NRRect *view_box = pattern_viewBox(pat);
931         double x, y, w, h;
932         double view_width, view_height;
933         x = 0;
934         y = 0;
935         w = width * bbox_width_scaler;
936         h = height * bbox_height_scaler;
938         view_width = view_box->x1 - view_box->x0;
939         view_height = view_box->y1 - view_box->y0;
941         //calculatePreserveAspectRatio(pat->aspect_align, pat->aspect_clip, view_width, view_height, &x, &y, &w, &h);
942         pcs2dev[0] = w / view_width;
943         pcs2dev[3] = h / view_height;
944         pcs2dev[4] = x - view_box->x0 * pcs2dev[0];
945         pcs2dev[5] = y - view_box->y0 * pcs2dev[3];
946     } else if (pbox && pattern_patternContentUnits(pat) == SP_PATTERN_UNITS_OBJECTBOUNDINGBOX) {
947         pcs2dev[0] = pbox->x1 - pbox->x0;
948         pcs2dev[3] = pbox->y1 - pbox->y0;
949     }
951     // calculate the size of the surface which has to be created
952     // the scaling needs to be taken into account in the ctm after the pattern transformation
953     NR::Matrix temp;
954     temp = pattern_transform * _state->transform;
955     double width_scaler = sqrt(temp[0] * temp[0] + temp[2] * temp[2]);
956     double height_scaler = sqrt(temp[1] * temp[1] + temp[3] * temp[3]);
958     if (_vector_based_target) {
959         // eliminate PT_PER_PX mul from these
960         width_scaler *= 1.25;
961         height_scaler *= 1.25;
962     }
963     double surface_width = ceil(bbox_width_scaler * width_scaler * width);
964     double surface_height = ceil(bbox_height_scaler * height_scaler * height);
965     TRACE(("surface size: %f x %f\n", surface_width, surface_height));
966     // create new rendering context
967     CairoRenderContext *pattern_ctx = cloneMe(surface_width, surface_height);
969     // adjust the size of the painted pattern to fit exactly the created surface
970     // this has to be done because of the rounding to obtain an integer pattern surface width/height
971     double scale_width = surface_width / (bbox_width_scaler * width);
972     double scale_height = surface_height / (bbox_height_scaler * height);
973     if (scale_width != 1.0 || scale_height != 1.0 || _vector_based_target) {
974         TRACE(("needed to scale with %f %f\n", scale_width, scale_height));
975         pcs2dev *= NR::scale(1.0 / scale_width, 1.0 / scale_height);
976         ps2user *= NR::scale(scale_width, scale_height);
977     }
979     pattern_ctx->setTransform(&pcs2dev);
980     pattern_ctx->pushState();
982     // create arena and group
983     NRArena *arena = NRArena::create();
984     unsigned dkey = sp_item_display_key_new(1);
986     // show items and render them
987     for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
988         if (pat_i && SP_IS_OBJECT (pat_i) && pattern_hasItemChildren(pat_i)) { // find the first one with item children
989             for (SPObject *child = sp_object_first_child(SP_OBJECT(pat_i)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
990                 if (SP_IS_ITEM (child)) {
991                     sp_item_invoke_show (SP_ITEM (child), arena, dkey, SP_ITEM_REFERENCE_FLAGS);
992                     _renderer->renderItem(pattern_ctx, SP_ITEM (child));
993                 }
994             }
995             break; // do not go further up the chain if children are found
996         }
997     }
999     pattern_ctx->popState();
1001     // setup a cairo_pattern_t
1002     cairo_surface_t *pattern_surface = pattern_ctx->getSurface();
1003     TEST(pattern_ctx->saveAsPng("pattern.png"));
1004     cairo_pattern_t *result = cairo_pattern_create_for_surface(pattern_surface);
1005     cairo_pattern_set_extend(result, CAIRO_EXTEND_REPEAT);
1007     // set pattern transformation
1008     cairo_matrix_t pattern_matrix;
1009     _initCairoMatrix(&pattern_matrix, &ps2user);
1010     cairo_matrix_invert(&pattern_matrix);
1011     cairo_pattern_set_matrix(result, &pattern_matrix);
1013     delete pattern_ctx;
1015     // hide all items
1016     for (SPPattern *pat_i = pat; pat_i != NULL; pat_i = pat_i->ref ? pat_i->ref->getObject() : NULL) {
1017         if (pat_i && SP_IS_OBJECT (pat_i) && pattern_hasItemChildren(pat_i)) { // find the first one with item children
1018             for (SPObject *child = sp_object_first_child(SP_OBJECT(pat_i)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
1019                 if (SP_IS_ITEM (child)) {
1020                     sp_item_invoke_hide (SP_ITEM (child), dkey);
1021                 }
1022             }
1023             break; // do not go further up the chain if children are found
1024         }
1025     }
1027     return result;
1030 cairo_pattern_t*
1031 CairoRenderContext::_createPatternForPaintServer(SPPaintServer const *const paintserver,
1032                                                  NRRect const *pbox, float alpha)
1034     cairo_pattern_t *pattern = NULL;
1035     bool apply_bbox2user = FALSE;
1037     if (SP_IS_LINEARGRADIENT (paintserver)) {
1039             SPLinearGradient *lg=SP_LINEARGRADIENT(paintserver);
1041             sp_gradient_ensure_vector(SP_GRADIENT(lg)); // when exporting from commandline, vector is not built
1043             NR::Point p1 (lg->x1.computed, lg->y1.computed);
1044             NR::Point p2 (lg->x2.computed, lg->y2.computed);
1045             if (pbox && SP_GRADIENT(lg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
1046                 // convert to userspace
1047                 NR::Matrix bbox2user(pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);
1048                 p1 *= bbox2user;
1049                 p2 *= bbox2user;
1050             }
1052             // create linear gradient pattern
1053             pattern = cairo_pattern_create_linear(p1[NR::X], p1[NR::Y], p2[NR::X], p2[NR::Y]);
1055             // add stops
1056             for (gint i = 0; unsigned(i) < lg->vector.stops.size(); i++) {
1057                 float rgb[3];
1058                 sp_color_get_rgb_floatv(&lg->vector.stops[i].color, rgb);
1059                 cairo_pattern_add_color_stop_rgba(pattern, lg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], lg->vector.stops[i].opacity * alpha);
1060             }
1061     } else if (SP_IS_RADIALGRADIENT (paintserver)) {
1063         SPRadialGradient *rg=SP_RADIALGRADIENT(paintserver);
1065         sp_gradient_ensure_vector(SP_GRADIENT(rg)); // when exporting from commandline, vector is not built
1067         NR::Point c (rg->cx.computed, rg->cy.computed);
1068         NR::Point f (rg->fx.computed, rg->fy.computed);
1069         double r = rg->r.computed;
1070         if (pbox && SP_GRADIENT(rg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX)
1071             apply_bbox2user = true;
1073         // create radial gradient pattern
1074         pattern = cairo_pattern_create_radial(f[NR::X], f[NR::Y], 0, c[NR::X], c[NR::Y], r);
1076         // add stops
1077         for (gint i = 0; unsigned(i) < rg->vector.stops.size(); i++) {
1078             float rgb[3];
1079             sp_color_get_rgb_floatv(&rg->vector.stops[i].color, rgb);
1080             cairo_pattern_add_color_stop_rgba(pattern, rg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], rg->vector.stops[i].opacity * alpha);
1081         }
1082     } else if (SP_IS_PATTERN (paintserver)) {
1084         pattern = _createPatternPainter(paintserver, pbox);
1085     } else {
1086         return NULL;
1087     }
1089     if (pattern && SP_IS_GRADIENT (paintserver)) {
1090         SPGradient *g = SP_GRADIENT(paintserver);
1092         // set extend type
1093         SPGradientSpread spread = sp_gradient_get_spread(g);
1094         switch (spread) {
1095             case SP_GRADIENT_SPREAD_REPEAT: {
1096                 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
1097                 break;
1098             }
1099             case SP_GRADIENT_SPREAD_REFLECT: {      // not supported by cairo-pdf yet
1100                 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REFLECT);
1101                 break;
1102             }
1103             case SP_GRADIENT_SPREAD_PAD: {    // not supported by cairo-pdf yet
1104                 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD);
1105                 break;
1106             }
1107             default: {
1108                 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_NONE);
1109                 break;
1110             }
1111         }
1113         cairo_matrix_t pattern_matrix;
1114         if (g->gradientTransform_set) {
1115             // apply gradient transformation
1116             cairo_matrix_init(&pattern_matrix,
1117                 g->gradientTransform[0], g->gradientTransform[1],
1118                 g->gradientTransform[2], g->gradientTransform[3],
1119                 g->gradientTransform[4], g->gradientTransform[5]);
1120         } else {
1121             cairo_matrix_init_identity (&pattern_matrix);
1122         }
1124         if (apply_bbox2user) {
1125             // convert to userspace
1126             cairo_matrix_t bbox2user;
1127             cairo_matrix_init (&bbox2user, pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);
1128             cairo_matrix_multiply (&pattern_matrix, &bbox2user, &pattern_matrix);
1129         }
1130         cairo_matrix_invert(&pattern_matrix);   // because Cairo expects a userspace->patternspace matrix
1131         cairo_pattern_set_matrix(pattern, &pattern_matrix);
1132     }
1134     return pattern;
1137 void
1138 CairoRenderContext::_setFillStyle(SPStyle const *const style, NRRect const *pbox)
1140     g_return_if_fail( style->fill.isColor()
1141                       || style->fill.isPaintserver() );
1143     float alpha = SP_SCALE24_TO_FLOAT(style->fill_opacity.value);
1144     if (_state->merge_opacity) {
1145         alpha *= _state->opacity;
1146         TRACE(("merged op=%f\n", alpha));
1147     }
1149     if (style->fill.isColor()) {
1150         float rgb[3];
1151         sp_color_get_rgb_floatv(&style->fill.value.color, rgb);
1153         cairo_set_source_rgba(_cr, rgb[0], rgb[1], rgb[2], alpha);
1154     } else {
1155         g_assert( style->fill.isPaintserver()
1156                   || SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style))
1157                   || SP_IS_PATTERN(SP_STYLE_FILL_SERVER(style)) );
1159         cairo_pattern_t *pattern = _createPatternForPaintServer(SP_STYLE_FILL_SERVER(style), pbox, alpha);
1161         if (pattern) {
1162             cairo_set_source(_cr, pattern);
1163             cairo_pattern_destroy(pattern);
1164         }
1165     }
1168 void
1169 CairoRenderContext::_setStrokeStyle(SPStyle const *style, NRRect const *pbox)
1171     float alpha = SP_SCALE24_TO_FLOAT(style->stroke_opacity.value);
1172     if (_state->merge_opacity)
1173         alpha *= _state->opacity;
1175     if (style->stroke.isColor()) {
1176         float rgb[3];
1177         sp_color_get_rgb_floatv(&style->stroke.value.color, rgb);
1179         cairo_set_source_rgba(_cr, rgb[0], rgb[1], rgb[2], alpha);
1180     } else {
1181         g_assert( style->fill.isPaintserver()
1182                   || SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style))
1183                   || SP_IS_PATTERN(SP_STYLE_STROKE_SERVER(style)) );
1185         cairo_pattern_t *pattern = _createPatternForPaintServer(SP_STYLE_STROKE_SERVER(style), pbox, alpha);
1187         if (pattern) {
1188             cairo_set_source(_cr, pattern);
1189             cairo_pattern_destroy(pattern);
1190         }
1191     }
1193     if (style->stroke_dash.n_dash   &&
1194         style->stroke_dash.dash       )
1195     {
1196         cairo_set_dash(_cr, style->stroke_dash.dash, style->stroke_dash.n_dash, style->stroke_dash.offset);
1197     } else {
1198         cairo_set_dash(_cr, NULL, 0, 0.0);      // disable dashing
1199     }
1201     cairo_set_line_width(_cr, style->stroke_width.computed);
1203     // set line join type
1204     cairo_line_join_t join = CAIRO_LINE_JOIN_MITER;
1205     switch (style->stroke_linejoin.computed) {
1206         case SP_STROKE_LINEJOIN_MITER:
1207             join = CAIRO_LINE_JOIN_MITER;
1208             break;
1209         case SP_STROKE_LINEJOIN_ROUND:
1210             join = CAIRO_LINE_JOIN_ROUND;
1211             break;
1212         case SP_STROKE_LINEJOIN_BEVEL:
1213             join = CAIRO_LINE_JOIN_BEVEL;
1214             break;
1215     }
1216     cairo_set_line_join(_cr, join);
1218     // set line cap type
1219     cairo_line_cap_t cap = CAIRO_LINE_CAP_BUTT;
1220     switch (style->stroke_linecap.computed) {
1221         case SP_STROKE_LINECAP_BUTT:
1222             cap = CAIRO_LINE_CAP_BUTT;
1223             break;
1224         case SP_STROKE_LINECAP_ROUND:
1225             cap = CAIRO_LINE_CAP_ROUND;
1226             break;
1227         case SP_STROKE_LINECAP_SQUARE:
1228             cap = CAIRO_LINE_CAP_SQUARE;
1229             break;
1230     }
1231     cairo_set_line_cap(_cr, cap);
1232     cairo_set_miter_limit(_cr, MAX(1, style->stroke_miterlimit.value));
1235 bool
1236 CairoRenderContext::renderPath(NRBPath const *bpath, SPStyle const *style, NRRect const *pbox)
1238     g_assert( _is_valid );
1240     if (_render_mode == RENDER_MODE_CLIP) {
1241         if (_clip_mode == CLIP_MODE_PATH) {
1242             addClipPath(bpath->path, &style->fill_rule);
1243         } else {
1244             setBpath(bpath->path);
1245             if (style->fill_rule.value == SP_WIND_RULE_EVENODD) {
1246                 cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);
1247             } else {
1248                 cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);
1249             }
1250             cairo_fill(_cr);
1251             TEST(cairo_surface_write_to_png (_surface, "pathmask.png"));
1252         }
1253         return true;
1254     }
1256     if (style->fill.isNone() && style->stroke.isNone())
1257         return true;
1259     bool need_layer = ( !_state->merge_opacity && !_state->need_layer &&
1260                         ( _state->opacity != 1.0 || _state->clip_path != NULL || _state->mask != NULL ) );
1262     if (!need_layer)
1263         cairo_save(_cr);
1264     else
1265         pushLayer();
1267     if (!style->fill.isNone()) {
1268         _setFillStyle(style, pbox);
1269         setBpath(bpath->path);
1271         if (style->fill_rule.value == SP_WIND_RULE_EVENODD) {
1272             cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);
1273         } else {
1274             cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);
1275         }
1277         if (style->stroke.isNone())
1278             cairo_fill(_cr);
1279         else
1280             cairo_fill_preserve(_cr);
1281     }
1283     if (!style->stroke.isNone()) {
1284         _setStrokeStyle(style, pbox);
1285         if (style->fill.isNone())
1286             setBpath(bpath->path);
1288         cairo_stroke(_cr);
1289     }
1291     if (need_layer)
1292         popLayer();
1293     else
1294         cairo_restore(_cr);
1296     return true;
1299 bool
1300 CairoRenderContext::renderImage(guchar *px, unsigned int w, unsigned int h, unsigned int rs,
1301                                 NR::Matrix const *image_transform, SPStyle const *style)
1303     g_assert( _is_valid );
1305     if (_render_mode == RENDER_MODE_CLIP)
1306         return true;
1308     guchar* px_rgba = (guchar*)g_malloc(4 * w * h);
1309     if (!px_rgba)
1310         return false;
1312     float opacity;
1313     if (_state->merge_opacity)
1314         opacity = _state->opacity;
1315     else
1316         opacity = 1.0;
1318     // make a copy of the original pixbuf with premultiplied alpha
1319     // if we pass the original pixbuf it will get messed up
1320     for (unsigned i = 0; i < h; i++) {
1321         for (unsigned j = 0; j < w; j++) {
1322             guchar const *src = px + i * rs + j * 4;
1323             guint32 *dst = (guint32 *)(px_rgba + i * rs + j * 4);
1324             guchar r, g, b, alpha_dst;
1326             // calculate opacity-modified alpha
1327             alpha_dst = src[3];
1328             if (opacity != 1.0 && _vector_based_target)
1329                 alpha_dst = (guchar)ceil((float)alpha_dst * opacity);
1331             // premul alpha (needed because this will be undone by cairo-pdf)
1332             r = src[0]*alpha_dst/255;
1333             g = src[1]*alpha_dst/255;
1334             b = src[2]*alpha_dst/255;
1336             *dst = (((alpha_dst) << 24) | (((r)) << 16) | (((g)) << 8) | (b));
1337         }
1338     }
1340     cairo_surface_t *image_surface = cairo_image_surface_create_for_data(px_rgba, CAIRO_FORMAT_ARGB32, w, h, w * 4);
1341     if (cairo_surface_status(image_surface)) {
1342         TRACE(("Image surface creation failed:\n%s\n", cairo_status_to_string(cairo_surface_status(image_surface))));
1343         return false;
1344     }
1346     // setup automatic freeing of the image data when destroying the surface
1347     static cairo_user_data_key_t key;
1348     cairo_surface_set_user_data(image_surface, &key, px_rgba, (cairo_destroy_func_t)g_free);
1350     cairo_save(_cr);
1352     // scaling by width & height is not needed because it will be done by Cairo
1353     if (image_transform)
1354         transform(image_transform);
1356     cairo_set_source_surface(_cr, image_surface, 0.0, 0.0);
1358     // set clip region so that the pattern will not be repeated (bug in Cairo-PDF)
1359     if (_vector_based_target) {
1360         cairo_new_path(_cr);
1361         cairo_rectangle(_cr, 0, 0, w, h);
1362         cairo_clip(_cr);
1363     }
1365     if (_vector_based_target)
1366         cairo_paint(_cr);
1367     else
1368         cairo_paint_with_alpha(_cr, opacity);
1370     cairo_restore(_cr);
1372     cairo_surface_destroy(image_surface);
1374     return true;
1377 #define GLYPH_ARRAY_SIZE 64
1379 unsigned int
1380 CairoRenderContext::_showGlyphs(cairo_t *cr, PangoFont *font, std::vector<CairoGlyphInfo> const &glyphtext, bool is_stroke)
1382     cairo_glyph_t glyph_array[GLYPH_ARRAY_SIZE];
1383     cairo_glyph_t *glyphs = glyph_array;
1384     unsigned int num_glyphs = glyphtext.size();
1385     if (num_glyphs > GLYPH_ARRAY_SIZE)
1386         glyphs = (cairo_glyph_t*)g_malloc(sizeof(cairo_glyph_t) * num_glyphs);
1388     unsigned int num_invalid_glyphs = 0;
1389     unsigned int i = 0;
1390     for (std::vector<CairoGlyphInfo>::const_iterator it_info = glyphtext.begin() ; it_info != glyphtext.end() ; it_info++) {
1391         // skip glyphs which are PANGO_GLYPH_EMPTY (0x0FFFFFFF)
1392         // or have the PANGO_GLYPH_UNKNOWN_FLAG (0x10000000) set
1393         if (it_info->index == 0x0FFFFFFF || it_info->index & 0x10000000) {
1394             TRACE(("INVALID GLYPH found\n"));
1395             num_invalid_glyphs++;
1396             continue;
1397         }
1398         glyphs[i - num_invalid_glyphs].index = it_info->index;
1399         glyphs[i - num_invalid_glyphs].x = it_info->x;
1400         glyphs[i - num_invalid_glyphs].y = it_info->y;
1401         i++;
1402     }
1404     if (is_stroke || _is_texttopath)
1405         cairo_glyph_path(cr, glyphs, num_glyphs - num_invalid_glyphs);
1406     else
1407         cairo_show_glyphs(cr, glyphs, num_glyphs - num_invalid_glyphs);
1409     if (num_glyphs > GLYPH_ARRAY_SIZE)
1410         g_free(glyphs);
1412     return num_glyphs - num_invalid_glyphs;
1415 bool
1416 CairoRenderContext::renderGlyphtext(PangoFont *font, NR::Matrix const *font_matrix,
1417                                     std::vector<CairoGlyphInfo> const &glyphtext, SPStyle const *style)
1419     // create a cairo_font_face from PangoFont
1420     double size = style->font_size.computed;
1421     PangoFcFont *fc_font = PANGO_FC_FONT(font);
1422     FcPattern *fc_pattern = fc_font->font_pattern;
1424     cairo_save(_cr);
1426 #ifdef CAIRO_HAS_FT_FONT
1427     cairo_font_face_t *font_face = cairo_ft_font_face_create_for_pattern(fc_pattern);
1428     cairo_set_font_face(_cr, font_face);
1430     if (FcPatternGetDouble(fc_pattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch)
1431         size = 12.0;
1433     // set the given font matrix
1434     cairo_matrix_t matrix;
1435     _initCairoMatrix(&matrix, font_matrix);
1436     cairo_set_font_matrix(_cr, &matrix);
1438     if (_render_mode == RENDER_MODE_CLIP) {
1439         if (_clip_mode == CLIP_MODE_MASK) {
1440             if (style->fill_rule.value == SP_WIND_RULE_EVENODD) {
1441                 cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_EVEN_ODD);
1442             } else {
1443                 cairo_set_fill_rule(_cr, CAIRO_FILL_RULE_WINDING);
1444             }
1445             _showGlyphs(_cr, font, glyphtext, FALSE);
1446         } else {
1447             // just add the glyph paths to the current context
1448             _showGlyphs(_cr, font, glyphtext, TRUE);
1449         }
1450     } else {
1452         if (style->fill.isColor() || style->fill.isPaintserver()) {
1453             // set fill style
1454             _setFillStyle(style, NULL);
1456             _showGlyphs(_cr, font, glyphtext, FALSE);
1457         }
1459         if (style->stroke.isColor() || style->stroke.isPaintserver()) {
1460             // set stroke style
1461             _setStrokeStyle(style, NULL);
1463             // paint stroke
1464             _showGlyphs(_cr, font, glyphtext, TRUE);
1465             cairo_stroke(_cr);
1466         }
1467     }
1469     cairo_restore(_cr);
1471     cairo_font_face_destroy(font_face);
1472 #else
1473     (void)size;
1474     (void)fc_pattern;
1476     cairo_restore(_cr);
1477 #endif
1479     return true;
1482 /* Helper functions */
1484 void
1485 CairoRenderContext::addBpath(NArtBpath const *bp)
1487     bool closed = false;
1488     while (bp->code != NR_END) {
1489         switch (bp->code) {
1490             case NR_MOVETO:
1491                 if (closed) {
1492                     cairo_close_path(_cr);
1493                 }
1494                 closed = true;
1495                 cairo_move_to(_cr, bp->x3, bp->y3);
1496                 break;
1497             case NR_MOVETO_OPEN:
1498                 if (closed) {
1499                     cairo_close_path(_cr);
1500                 }
1501                 closed = false;
1502                 cairo_move_to(_cr, bp->x3, bp->y3);
1503                 break;
1504             case NR_LINETO:
1505                 cairo_line_to(_cr, bp->x3, bp->y3);
1506                 break;
1507             case NR_CURVETO:
1508                 cairo_curve_to(_cr, bp->x1, bp->y1, bp->x2, bp->y2, bp->x3, bp->y3);
1509                 break;
1510             default:
1511                 break;
1512         }
1513         bp += 1;
1514     }
1515     if (closed) {
1516         cairo_close_path(_cr);
1517     }
1520 void
1521 CairoRenderContext::setBpath(NArtBpath const *bp)
1523     cairo_new_path(_cr);
1524     if (bp)
1525         addBpath(bp);
1528 void
1529 CairoRenderContext::_concatTransform(cairo_t *cr, double xx, double yx, double xy, double yy, double x0, double y0)
1531     cairo_matrix_t matrix;
1533     cairo_matrix_init(&matrix, xx, yx, xy, yy, x0, y0);
1534     cairo_transform(cr, &matrix);
1537 void
1538 CairoRenderContext::_initCairoMatrix(cairo_matrix_t *matrix, NR::Matrix const *transform)
1540     matrix->xx = (*transform)[0];
1541     matrix->yx = (*transform)[1];
1542     matrix->xy = (*transform)[2];
1543     matrix->yy = (*transform)[3];
1544     matrix->x0 = (*transform)[4];
1545     matrix->y0 = (*transform)[5];
1548 void
1549 CairoRenderContext::_concatTransform(cairo_t *cr, NR::Matrix const *transform)
1551     _concatTransform(cr, (*transform)[0], (*transform)[1],
1552                      (*transform)[2], (*transform)[3],
1553                      (*transform)[4], (*transform)[5]);
1556 static cairo_status_t
1557 _write_callback(void *closure, const unsigned char *data, unsigned int length)
1559     size_t written;
1560     FILE *file = (FILE*)closure;
1562     written = fwrite (data, 1, length, file);
1564     if (written == length)
1565         return CAIRO_STATUS_SUCCESS;
1566     else
1567         return CAIRO_STATUS_WRITE_ERROR;
1570 #include "clear-n_.h"
1572 }  /* namespace Internal */
1573 }  /* namespace Extension */
1574 }  /* namespace Inkscape */
1576 #undef TRACE
1577 #undef TEST
1579 /* End of GNU GPL code */
1582 /*
1583   Local Variables:
1584   mode:c++
1585   c-file-style:"stroustrup"
1586   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1587   indent-tabs-mode:nil
1588   fill-column:99
1589   End:
1590 */
1591 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :