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