Line data Source code
1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include <math.h>
21 :
22 : #include <canvas/debug.hxx>
23 : #include <canvas/verbosetrace.hxx>
24 : #include <cppuhelper/supportsservice.hxx>
25 : #include <tools/diagnose_ex.h>
26 :
27 : #include <vcl/metric.hxx>
28 : #include <vcl/virdev.hxx>
29 :
30 : #ifdef WNT
31 : #ifdef max
32 : #undef max
33 : #endif
34 : #ifdef min
35 : #undef min
36 : #endif
37 : #endif
38 : #include <vcl/sysdata.hxx>
39 :
40 : #include <basegfx/matrix/b2dhommatrix.hxx>
41 : #include <basegfx/numeric/ftools.hxx>
42 :
43 : #include <boost/scoped_array.hpp>
44 :
45 : #include "cairo_textlayout.hxx"
46 : #include "cairo_spritecanvas.hxx"
47 :
48 : #ifdef CAIRO_HAS_QUARTZ_SURFACE
49 : # include "cairo_quartz_cairo.hxx"
50 : #elif defined CAIRO_HAS_WIN32_SURFACE
51 : # include "cairo_win32_cairo.hxx"
52 : # include <cairo-win32.h>
53 : #elif defined CAIRO_HAS_XLIB_SURFACE
54 : # include "cairo_xlib_cairo.hxx"
55 : # include <cairo-ft.h>
56 : #else
57 : # error Native API needed.
58 : #endif
59 :
60 : #ifdef IOS
61 : #include <CoreText/CoreText.h>
62 : #endif
63 :
64 : using namespace ::cairo;
65 : using namespace ::com::sun::star;
66 :
67 : namespace cairocanvas
68 : {
69 : namespace
70 : {
71 0 : void setupLayoutMode( OutputDevice& rOutDev,
72 : sal_Int8 nTextDirection )
73 : {
74 : // TODO(P3): avoid if already correctly set
75 0 : ComplexTextLayoutMode nLayoutMode = TEXT_LAYOUT_DEFAULT;
76 0 : switch( nTextDirection )
77 : {
78 : case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
79 0 : break;
80 : case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
81 0 : nLayoutMode = TEXT_LAYOUT_BIDI_STRONG;
82 0 : break;
83 : case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
84 0 : nLayoutMode = TEXT_LAYOUT_BIDI_RTL;
85 0 : break;
86 : case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
87 0 : nLayoutMode = TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG;
88 0 : break;
89 : default:
90 0 : break;
91 : }
92 :
93 : // set calculated layout mode. Origin is always the left edge,
94 : // as required at the API spec
95 0 : rOutDev.SetLayoutMode( nLayoutMode | TEXT_LAYOUT_TEXTORIGIN_LEFT );
96 0 : }
97 :
98 0 : bool compareFallbacks(const SystemGlyphData&rA, const SystemGlyphData &rB)
99 : {
100 0 : return rA.fallbacklevel < rB.fallbacklevel;
101 : }
102 : }
103 :
104 0 : TextLayout::TextLayout( const rendering::StringContext& aText,
105 : sal_Int8 nDirection,
106 : sal_Int64 /*nRandomSeed*/,
107 : const CanvasFont::Reference& rFont,
108 : const SurfaceProviderRef& rRefDevice ) :
109 : TextLayout_Base( m_aMutex ),
110 : maText( aText ),
111 : maLogicalAdvancements(),
112 : mpFont( rFont ),
113 : mpRefDevice( rRefDevice ),
114 0 : mnTextDirection( nDirection )
115 : {
116 0 : }
117 :
118 0 : TextLayout::~TextLayout()
119 : {
120 0 : }
121 :
122 0 : void SAL_CALL TextLayout::disposing()
123 : {
124 0 : ::osl::MutexGuard aGuard( m_aMutex );
125 :
126 0 : mpFont.clear();
127 0 : mpRefDevice.clear();
128 0 : }
129 :
130 : // XTextLayout
131 0 : uno::Sequence< uno::Reference< rendering::XPolyPolygon2D > > SAL_CALL TextLayout::queryTextShapes( ) throw (uno::RuntimeException, std::exception)
132 : {
133 0 : ::osl::MutexGuard aGuard( m_aMutex );
134 :
135 : // TODO
136 0 : return uno::Sequence< uno::Reference< rendering::XPolyPolygon2D > >();
137 : }
138 :
139 0 : uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryInkMeasures( ) throw (uno::RuntimeException, std::exception)
140 : {
141 0 : ::osl::MutexGuard aGuard( m_aMutex );
142 :
143 : // TODO
144 0 : return uno::Sequence< geometry::RealRectangle2D >();
145 : }
146 :
147 0 : uno::Sequence< geometry::RealRectangle2D > SAL_CALL TextLayout::queryMeasures( ) throw (uno::RuntimeException, std::exception)
148 : {
149 0 : ::osl::MutexGuard aGuard( m_aMutex );
150 :
151 : // TODO
152 0 : return uno::Sequence< geometry::RealRectangle2D >();
153 : }
154 :
155 0 : uno::Sequence< double > SAL_CALL TextLayout::queryLogicalAdvancements( ) throw (uno::RuntimeException, std::exception)
156 : {
157 0 : ::osl::MutexGuard aGuard( m_aMutex );
158 :
159 0 : return maLogicalAdvancements;
160 : }
161 :
162 0 : void SAL_CALL TextLayout::applyLogicalAdvancements( const uno::Sequence< double >& aAdvancements ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception)
163 : {
164 0 : ::osl::MutexGuard aGuard( m_aMutex );
165 :
166 0 : if( aAdvancements.getLength() != maText.Length )
167 : {
168 : OSL_TRACE( "TextLayout::applyLogicalAdvancements(): mismatching number of advancements" );
169 0 : throw lang::IllegalArgumentException();
170 : }
171 :
172 0 : maLogicalAdvancements = aAdvancements;
173 0 : }
174 :
175 0 : geometry::RealRectangle2D SAL_CALL TextLayout::queryTextBounds( ) throw (uno::RuntimeException, std::exception)
176 : {
177 0 : ::osl::MutexGuard aGuard( m_aMutex );
178 :
179 0 : OutputDevice* pOutDev = mpRefDevice->getOutputDevice();
180 0 : if( !pOutDev )
181 0 : return geometry::RealRectangle2D();
182 :
183 0 : VirtualDevice aVDev( *pOutDev );
184 0 : aVDev.SetFont( mpFont->getVCLFont() );
185 :
186 : // need metrics for Y offset, the XCanvas always renders
187 : // relative to baseline
188 0 : const ::FontMetric& aMetric( aVDev.GetFontMetric() );
189 :
190 0 : setupLayoutMode( aVDev, mnTextDirection );
191 :
192 0 : const sal_Int32 nAboveBaseline( -aMetric.GetIntLeading() - aMetric.GetAscent() );
193 0 : const sal_Int32 nBelowBaseline( aMetric.GetDescent() );
194 :
195 0 : if( maLogicalAdvancements.getLength() )
196 : {
197 : return geometry::RealRectangle2D( 0, nAboveBaseline,
198 0 : maLogicalAdvancements[ maLogicalAdvancements.getLength()-1 ],
199 0 : nBelowBaseline );
200 : }
201 : else
202 : {
203 : return geometry::RealRectangle2D( 0, nAboveBaseline,
204 : aVDev.GetTextWidth(
205 : maText.Text,
206 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
207 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) ),
208 0 : nBelowBaseline );
209 0 : }
210 : }
211 :
212 0 : double SAL_CALL TextLayout::justify( double /*nSize*/ ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception)
213 : {
214 0 : ::osl::MutexGuard aGuard( m_aMutex );
215 :
216 : // TODO
217 0 : return 0.0;
218 : }
219 :
220 0 : double SAL_CALL TextLayout::combinedJustify( const uno::Sequence< uno::Reference< rendering::XTextLayout > >& /*aNextLayouts*/,
221 : double /*nSize*/ ) throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception)
222 : {
223 0 : ::osl::MutexGuard aGuard( m_aMutex );
224 :
225 : // TODO
226 0 : return 0.0;
227 : }
228 :
229 0 : rendering::TextHit SAL_CALL TextLayout::getTextHit( const geometry::RealPoint2D& /*aHitPoint*/ ) throw (uno::RuntimeException, std::exception)
230 : {
231 0 : ::osl::MutexGuard aGuard( m_aMutex );
232 :
233 : // TODO
234 0 : return rendering::TextHit();
235 : }
236 :
237 0 : rendering::Caret SAL_CALL TextLayout::getCaret( sal_Int32 /*nInsertionIndex*/,
238 : sal_Bool /*bExcludeLigatures*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException, std::exception)
239 : {
240 0 : ::osl::MutexGuard aGuard( m_aMutex );
241 :
242 : // TODO
243 0 : return rendering::Caret();
244 : }
245 :
246 0 : sal_Int32 SAL_CALL TextLayout::getNextInsertionIndex( sal_Int32 /*nStartIndex*/,
247 : sal_Int32 /*nCaretAdvancement*/,
248 : sal_Bool /*bExcludeLigatures*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException, std::exception)
249 : {
250 0 : ::osl::MutexGuard aGuard( m_aMutex );
251 :
252 : // TODO
253 0 : return 0;
254 : }
255 :
256 0 : uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryVisualHighlighting( sal_Int32 /*nStartIndex*/,
257 : sal_Int32 /*nEndIndex*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException, std::exception)
258 : {
259 0 : ::osl::MutexGuard aGuard( m_aMutex );
260 :
261 : // TODO
262 0 : return uno::Reference< rendering::XPolyPolygon2D >();
263 : }
264 :
265 0 : uno::Reference< rendering::XPolyPolygon2D > SAL_CALL TextLayout::queryLogicalHighlighting( sal_Int32 /*nStartIndex*/,
266 : sal_Int32 /*nEndIndex*/ ) throw (lang::IndexOutOfBoundsException, uno::RuntimeException, std::exception)
267 : {
268 0 : ::osl::MutexGuard aGuard( m_aMutex );
269 :
270 : // TODO
271 0 : return uno::Reference< rendering::XPolyPolygon2D >();
272 : }
273 :
274 0 : double SAL_CALL TextLayout::getBaselineOffset( ) throw (uno::RuntimeException, std::exception)
275 : {
276 0 : ::osl::MutexGuard aGuard( m_aMutex );
277 :
278 : // TODO
279 0 : return 0.0;
280 : }
281 :
282 0 : sal_Int8 SAL_CALL TextLayout::getMainTextDirection( ) throw (uno::RuntimeException, std::exception)
283 : {
284 0 : ::osl::MutexGuard aGuard( m_aMutex );
285 :
286 0 : return mnTextDirection;
287 : }
288 :
289 0 : uno::Reference< rendering::XCanvasFont > SAL_CALL TextLayout::getFont( ) throw (uno::RuntimeException, std::exception)
290 : {
291 0 : ::osl::MutexGuard aGuard( m_aMutex );
292 :
293 0 : return mpFont.get();
294 : }
295 :
296 0 : rendering::StringContext SAL_CALL TextLayout::getText( ) throw (uno::RuntimeException, std::exception)
297 : {
298 0 : ::osl::MutexGuard aGuard( m_aMutex );
299 :
300 0 : return maText;
301 : }
302 :
303 : /**
304 : * TextLayout::isCairoRenderable
305 : *
306 : * Features currently not supported by Cairo (VCL rendering is used as fallback):
307 : * - vertical glyphs
308 : *
309 : * @return true, if text/font can be rendered with cairo
310 : **/
311 0 : bool TextLayout::isCairoRenderable(SystemFontData aSysFontData) const
312 : {
313 : #if defined UNX && !defined MACOSX && !defined IOS
314 : // is font usable?
315 0 : if (!aSysFontData.nFontId)
316 0 : return false;
317 : #endif
318 :
319 : // vertical glyph rendering is not supported in cairo for now
320 0 : if (aSysFontData.bVerticalCharacterType)
321 : {
322 : OSL_TRACE(":cairocanvas::TextLayout::isCairoRenderable(): ***************** VERTICAL CHARACTER STYLE!!! ****************");
323 0 : return false;
324 : }
325 :
326 0 : return true;
327 : }
328 :
329 : /**
330 : * TextLayout::draw
331 : *
332 : * Cairo-based text rendering. Draw text directly on the cairo surface with cairo fonts.
333 : * Avoid using VCL VirtualDevices for that, bypassing VCL DrawText functions, when possible
334 : *
335 : * Note: some text effects are not rendered due to lacking generic canvas or cairo canvas
336 : * implementation. See issues 92657, 92658, 92659, 92660, 97529
337 : *
338 : * @return true, if successful
339 : **/
340 0 : bool TextLayout::draw( SurfaceSharedPtr& pSurface,
341 : OutputDevice& rOutDev,
342 : const Point& rOutpos,
343 : const rendering::ViewState& viewState,
344 : const rendering::RenderState& renderState ) const
345 : {
346 0 : ::osl::MutexGuard aGuard( m_aMutex );
347 0 : SystemTextLayoutData aSysLayoutData;
348 : #if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1)
349 : LOGFONTW logfont;
350 : #endif
351 0 : setupLayoutMode( rOutDev, mnTextDirection );
352 :
353 : // TODO(P2): cache that
354 0 : ::boost::scoped_array< long > aOffsets(new long[maLogicalAdvancements.getLength()]);
355 :
356 0 : if( maLogicalAdvancements.getLength() )
357 : {
358 0 : setupTextOffsets( aOffsets.get(), maLogicalAdvancements, viewState, renderState );
359 :
360 : // TODO(F3): ensure correct length and termination for DX
361 : // array (last entry _must_ contain the overall width)
362 : }
363 :
364 0 : aSysLayoutData = rOutDev.GetSysTextLayoutData(rOutpos, maText.Text,
365 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
366 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length),
367 0 : maLogicalAdvancements.getLength() ? aOffsets.get() : NULL);
368 :
369 : // Sort them so that all glyphs on the same glyph fallback level are consecutive
370 0 : std::sort(aSysLayoutData.rGlyphData.begin(), aSysLayoutData.rGlyphData.end(), compareFallbacks);
371 0 : bool bCairoRenderable = true;
372 :
373 : //Pull all the fonts we need to render the text
374 : typedef std::pair<SystemFontData,int> FontLevel;
375 : typedef std::vector<FontLevel> FontLevelVector;
376 0 : FontLevelVector aFontData;
377 0 : SystemGlyphDataVector::const_iterator aGlyphIter=aSysLayoutData.rGlyphData.begin();
378 0 : const SystemGlyphDataVector::const_iterator aGlyphEnd=aSysLayoutData.rGlyphData.end();
379 0 : for( ; aGlyphIter != aGlyphEnd; ++aGlyphIter )
380 : {
381 0 : if( aFontData.empty() || aGlyphIter->fallbacklevel != aFontData.back().second )
382 : {
383 0 : aFontData.push_back(FontLevel(rOutDev.GetSysFontData(aGlyphIter->fallbacklevel),
384 0 : aGlyphIter->fallbacklevel));
385 0 : if( !isCairoRenderable(aFontData.back().first) )
386 : {
387 0 : bCairoRenderable = false;
388 : OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): VCL FALLBACK %s%s%s%s - %s",
389 : maLogicalAdvancements.getLength() ? "ADV " : "",
390 : aFontData.back().first.bAntialias ? "AA " : "",
391 : aFontData.back().first.bFakeBold ? "FB " : "",
392 : aFontData.back().first.bFakeItalic ? "FI " : "",
393 : OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ),
394 : RTL_TEXTENCODING_UTF8 ).getStr());
395 0 : break;
396 : }
397 : }
398 : }
399 :
400 : // The ::GetSysTextLayoutData(), i.e. layouting of text to glyphs can change the font being used.
401 : // The fallback checks need to be done after final font is known.
402 0 : if (!bCairoRenderable) // VCL FALLBACKS
403 : {
404 0 : if (maLogicalAdvancements.getLength()) // VCL FALLBACK - with glyph advances
405 : {
406 0 : rOutDev.DrawTextArray( rOutpos, maText.Text, aOffsets.get(),
407 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
408 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
409 0 : return true;
410 : }
411 : else // VCL FALLBACK - without advances
412 : {
413 : rOutDev.DrawText( rOutpos, maText.Text,
414 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
415 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
416 0 : return true;
417 : }
418 : }
419 :
420 0 : if (aSysLayoutData.rGlyphData.empty())
421 0 : return false; //??? false?
422 :
423 : /**
424 : * Setup platform independent glyph vector into cairo-based glyphs vector.
425 : **/
426 :
427 : // Loop through the fonts used and render the matching glyphs for each
428 0 : FontLevelVector::const_iterator aFontDataIter = aFontData.begin();
429 0 : const FontLevelVector::const_iterator aFontDataEnd = aFontData.end();
430 0 : for( ; aFontDataIter != aFontDataEnd; ++aFontDataIter )
431 : {
432 0 : const SystemFontData &rSysFontData = aFontDataIter->first;
433 :
434 : // setup glyphs
435 0 : std::vector<cairo_glyph_t> cairo_glyphs;
436 0 : cairo_glyphs.reserve( 256 );
437 :
438 0 : aGlyphIter=aSysLayoutData.rGlyphData.begin();
439 0 : for( ; aGlyphIter != aGlyphEnd; ++aGlyphIter )
440 : {
441 0 : SystemGlyphData systemGlyph = *aGlyphIter;
442 0 : if( systemGlyph.fallbacklevel != aFontDataIter->second )
443 0 : continue;
444 :
445 : cairo_glyph_t aGlyph;
446 0 : aGlyph.index = systemGlyph.index;
447 : #ifdef CAIRO_HAS_WIN32_SURFACE
448 : // Cairo requires standard glyph indexes (ETO_GLYPH_INDEX), while vcl/win/* uses ucs4 chars.
449 : // Convert to standard indexes
450 : aGlyph.index = cairo::ucs4toindex((unsigned int) aGlyph.index, rSysFontData.hFont);
451 : #endif
452 0 : aGlyph.x = systemGlyph.x;
453 0 : aGlyph.y = systemGlyph.y;
454 0 : cairo_glyphs.push_back(aGlyph);
455 : }
456 :
457 0 : if (cairo_glyphs.empty())
458 0 : continue;
459 :
460 : /**
461 : * Setup font
462 : **/
463 0 : cairo_font_face_t* font_face = NULL;
464 :
465 : #ifdef CAIRO_HAS_QUARTZ_SURFACE
466 : # ifdef MACOSX
467 : // TODO: use cairo_quartz_font_face_create_for_cgfont(cgFont)
468 : // when CGFont (Mac OS X 10.5 API) is provided by the AQUA VCL backend.
469 : font_face = cairo_quartz_font_face_create_for_atsu_font_id((ATSUFontID) rSysFontData.aATSUFontID);
470 : # else // iOS
471 : font_face = cairo_quartz_font_face_create_for_cgfont( CTFontCopyGraphicsFont( rSysFontData.rCTFont, NULL ) );
472 : # endif
473 :
474 : #elif defined CAIRO_HAS_WIN32_SURFACE
475 : # if (OSL_DEBUG_LEVEL > 1)
476 : GetObjectW( rSysFontData.hFont, sizeof(logfont), &logfont );
477 : # endif
478 : // Note: cairo library uses logfont fallbacks when lfEscapement, lfOrientation and lfWidth are not zero.
479 : // VCL always has non-zero value for lfWidth
480 : font_face = cairo_win32_font_face_create_for_hfont(rSysFontData.hFont);
481 :
482 : #elif defined CAIRO_HAS_XLIB_SURFACE
483 : font_face = cairo_ft_font_face_create_for_ft_face((FT_Face)rSysFontData.nFontId,
484 0 : rSysFontData.nFontFlags);
485 : #else
486 : # error Native API needed.
487 : #endif
488 :
489 0 : CairoSharedPtr pSCairo = pSurface->getCairo();
490 :
491 0 : cairo_set_font_face( pSCairo.get(), font_face);
492 :
493 : // create default font options. cairo_get_font_options() does not retrieve the surface defaults,
494 : // only what has been set before with cairo_set_font_options()
495 0 : cairo_font_options_t* options = cairo_font_options_create();
496 0 : if (rSysFontData.bAntialias)
497 : {
498 : // CAIRO_ANTIALIAS_GRAY provides more similar result to VCL Canvas,
499 : // so we're not using CAIRO_ANTIALIAS_SUBPIXEL
500 0 : cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY);
501 : }
502 0 : cairo_set_font_options( pSCairo.get(), options);
503 :
504 : // Font color
505 0 : Color mTextColor = rOutDev.GetTextColor();
506 : cairo_set_source_rgb(pSCairo.get(),
507 0 : mTextColor.GetRed()/255.0,
508 0 : mTextColor.GetGreen()/255.0,
509 0 : mTextColor.GetBlue()/255.0);
510 :
511 : // Font rotation and scaling
512 : cairo_matrix_t m;
513 0 : vcl::Font aFont = rOutDev.GetFont();
514 :
515 0 : cairo_matrix_init_identity(&m);
516 :
517 0 : if (aSysLayoutData.orientation)
518 0 : cairo_matrix_rotate(&m, (3600 - aSysLayoutData.orientation) * M_PI / 1800.0);
519 :
520 0 : long nWidth = aFont.GetWidth();
521 0 : long nHeight = aFont.GetHeight();
522 0 : if (nWidth == 0)
523 0 : nWidth = nHeight;
524 0 : cairo_matrix_scale(&m, nWidth, nHeight);
525 :
526 : //faux italics
527 0 : if (rSysFontData.bFakeItalic)
528 0 : m.xy = -m.xx * 0x6000L / 0x10000L;
529 :
530 0 : cairo_set_font_matrix(pSCairo.get(), &m);
531 :
532 : #if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1)
533 : # define TEMP_TRACE_FONT OUStringToOString( reinterpret_cast<const sal_Unicode*> (logfont.lfFaceName), RTL_TEXTENCODING_UTF8 ).getStr()
534 : #else
535 : # define TEMP_TRACE_FONT OUStringToOString( aFont.GetName(), RTL_TEXTENCODING_UTF8 ).getStr()
536 : #endif
537 : OSL_TRACE("\r\n:cairocanvas::TextLayout::draw(S,O,p,v,r): Size:(%d,%d), Pos (%d,%d), G(%d,%d,%d) %s%s%s%s || Name:%s - %s",
538 : aFont.GetWidth(),
539 : aFont.GetHeight(),
540 : (int) rOutpos.X(),
541 : (int) rOutpos.Y(),
542 : cairo_glyphs.size() > 0 ? cairo_glyphs[0].index : -1,
543 : cairo_glyphs.size() > 1 ? cairo_glyphs[1].index : -1,
544 : cairo_glyphs.size() > 2 ? cairo_glyphs[2].index : -1,
545 : maLogicalAdvancements.getLength() ? "ADV " : "",
546 : rSysFontData.bAntialias ? "AA " : "",
547 : rSysFontData.bFakeBold ? "FB " : "",
548 : rSysFontData.bFakeItalic ? "FI " : "",
549 : TEMP_TRACE_FONT,
550 : OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ),
551 : RTL_TEXTENCODING_UTF8 ).getStr()
552 : );
553 : #undef TEMP_TRACE_FONT
554 :
555 0 : cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
556 :
557 : //faux bold
558 0 : if (rSysFontData.bFakeBold)
559 : {
560 0 : double bold_dx = 0.5 * sqrt( 0.7 * aFont.GetHeight() );
561 0 : int total_steps = 1 * ((int) (bold_dx + 0.5));
562 :
563 : // loop to draw the text for every half pixel of displacement
564 0 : for (int nSteps = 0; nSteps < total_steps; nSteps++)
565 : {
566 0 : for(int nGlyphIdx = 0; nGlyphIdx < (int) cairo_glyphs.size(); nGlyphIdx++)
567 : {
568 0 : cairo_glyphs[nGlyphIdx].x += (bold_dx * nSteps / total_steps) / 4;
569 0 : cairo_glyphs[nGlyphIdx].y -= (bold_dx * nSteps / total_steps) / 4;
570 : }
571 0 : cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
572 : }
573 : OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): FAKEBOLD - dx:%d", (int) bold_dx);
574 : }
575 :
576 0 : cairo_restore( pSCairo.get() );
577 0 : cairo_font_face_destroy(font_face);
578 0 : cairo_font_options_destroy(options);
579 0 : }
580 0 : return true;
581 : }
582 :
583 :
584 : namespace
585 : {
586 0 : class OffsetTransformer
587 : {
588 : public:
589 0 : OffsetTransformer( const ::basegfx::B2DHomMatrix& rMat ) :
590 0 : maMatrix( rMat )
591 : {
592 0 : }
593 :
594 0 : sal_Int32 operator()( const double& rOffset )
595 : {
596 : // This is an optimization of the normal rMat*[x,0]
597 : // transformation of the advancement vector (in x
598 : // direction), followed by a length calculation of the
599 : // resulting vector: advancement' =
600 : // ||rMat*[x,0]||. Since advancements are vectors, we
601 : // can ignore translational components, thus if [x,0],
602 : // it follows that rMat*[x,0]=[x',0] holds. Thus, we
603 : // just have to calc the transformation of the x
604 : // component.
605 :
606 : // TODO(F2): Handle non-horizontal advancements!
607 0 : return ::basegfx::fround( hypot(maMatrix.get(0,0)*rOffset,
608 0 : maMatrix.get(1,0)*rOffset) );
609 : }
610 :
611 : private:
612 : ::basegfx::B2DHomMatrix maMatrix;
613 : };
614 : }
615 :
616 0 : void TextLayout::setupTextOffsets( long* outputOffsets,
617 : const uno::Sequence< double >& inputOffsets,
618 : const rendering::ViewState& viewState,
619 : const rendering::RenderState& renderState ) const
620 : {
621 0 : ENSURE_OR_THROW( outputOffsets!=NULL,
622 : "TextLayout::setupTextOffsets offsets NULL" );
623 :
624 0 : ::basegfx::B2DHomMatrix aMatrix;
625 :
626 : ::canvas::tools::mergeViewAndRenderTransform(aMatrix,
627 : viewState,
628 0 : renderState);
629 :
630 : // fill integer offsets
631 : ::std::transform( const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray(),
632 0 : const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray()+inputOffsets.getLength(),
633 : outputOffsets,
634 0 : OffsetTransformer( aMatrix ) );
635 0 : }
636 :
637 0 : OUString SAL_CALL TextLayout::getImplementationName() throw( uno::RuntimeException, std::exception )
638 : {
639 0 : return OUString( "CairoCanvas::TextLayout" );
640 : }
641 :
642 0 : sal_Bool SAL_CALL TextLayout::supportsService( const OUString& ServiceName ) throw( uno::RuntimeException, std::exception )
643 : {
644 0 : return cppu::supportsService( this, ServiceName );
645 : }
646 :
647 0 : uno::Sequence< OUString > SAL_CALL TextLayout::getSupportedServiceNames() throw( uno::RuntimeException, std::exception )
648 : {
649 0 : uno::Sequence< OUString > aRet(1);
650 0 : aRet[0] = "com.sun.star.rendering.TextLayout";
651 :
652 0 : return aRet;
653 : }
654 6 : }
655 :
656 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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