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 0 : void TextLayout::useFont( Cairo* pCairo )
305 : {
306 0 : rendering::FontRequest aFontRequest = mpFont->getFontRequest();
307 0 : rendering::FontInfo aFontInfo = aFontRequest.FontDescription;
308 :
309 0 : cairo_select_font_face( pCairo, OUStringToOString( aFontInfo.FamilyName, RTL_TEXTENCODING_UTF8 ).getStr(), CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL );
310 0 : cairo_set_font_size( pCairo, aFontRequest.CellSize );
311 0 : }
312 :
313 : /**
314 : * TextLayout::isCairoRenderable
315 : *
316 : * Features currenly not supported by Cairo (VCL rendering is used as fallback):
317 : * - vertical glyphs
318 : *
319 : * @return true, if text/font can be rendered with cairo
320 : **/
321 0 : bool TextLayout::isCairoRenderable(SystemFontData aSysFontData) const
322 : {
323 : #if defined UNX && !defined QUARTZ && !defined IOS
324 : // is font usable?
325 0 : if (!aSysFontData.nFontId)
326 0 : return false;
327 : #endif
328 :
329 : // vertical glyph rendering is not supported in cairo for now
330 0 : if (aSysFontData.bVerticalCharacterType)
331 : {
332 : OSL_TRACE(":cairocanvas::TextLayout::isCairoRenderable(): ***************** VERTICAL CHARACTER STYLE!!! ****************");
333 0 : return false;
334 : }
335 :
336 0 : return true;
337 : }
338 :
339 : /**
340 : * TextLayout::draw
341 : *
342 : * Cairo-based text rendering. Draw text directly on the cairo surface with cairo fonts.
343 : * Avoid using VCL VirtualDevices for that, bypassing VCL DrawText functions, when possible
344 : *
345 : * Note: some text effects are not rendered due to lacking generic canvas or cairo canvas
346 : * implementation. See issues 92657, 92658, 92659, 92660, 97529
347 : *
348 : * @return true, if successful
349 : **/
350 0 : bool TextLayout::draw( SurfaceSharedPtr& pSurface,
351 : OutputDevice& rOutDev,
352 : const Point& rOutpos,
353 : const rendering::ViewState& viewState,
354 : const rendering::RenderState& renderState ) const
355 : {
356 0 : ::osl::MutexGuard aGuard( m_aMutex );
357 0 : SystemTextLayoutData aSysLayoutData;
358 : #if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1)
359 : LOGFONTW logfont;
360 : #endif
361 0 : setupLayoutMode( rOutDev, mnTextDirection );
362 :
363 : // TODO(P2): cache that
364 0 : ::boost::scoped_array< sal_Int32 > aOffsets(new sal_Int32[maLogicalAdvancements.getLength()]);
365 :
366 0 : if( maLogicalAdvancements.getLength() )
367 : {
368 0 : setupTextOffsets( aOffsets.get(), maLogicalAdvancements, viewState, renderState );
369 :
370 : // TODO(F3): ensure correct length and termination for DX
371 : // array (last entry _must_ contain the overall width)
372 : }
373 :
374 : aSysLayoutData = rOutDev.GetSysTextLayoutData(rOutpos, maText.Text,
375 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
376 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length),
377 0 : maLogicalAdvancements.getLength() ? aOffsets.get() : NULL);
378 :
379 : // Sort them so that all glyphs on the same glyph fallback level are consecutive
380 0 : std::sort(aSysLayoutData.rGlyphData.begin(), aSysLayoutData.rGlyphData.end(), compareFallbacks);
381 0 : bool bCairoRenderable = true;
382 :
383 : //Pull all the fonts we need to render the text
384 : typedef std::pair<SystemFontData,int> FontLevel;
385 : typedef std::vector<FontLevel> FontLevelVector;
386 0 : FontLevelVector aFontData;
387 0 : SystemGlyphDataVector::const_iterator aGlyphIter=aSysLayoutData.rGlyphData.begin();
388 0 : const SystemGlyphDataVector::const_iterator aGlyphEnd=aSysLayoutData.rGlyphData.end();
389 0 : for( ; aGlyphIter != aGlyphEnd; ++aGlyphIter )
390 : {
391 0 : if( aFontData.empty() || aGlyphIter->fallbacklevel != aFontData.back().second )
392 : {
393 0 : aFontData.push_back(FontLevel(rOutDev.GetSysFontData(aGlyphIter->fallbacklevel),
394 0 : aGlyphIter->fallbacklevel));
395 0 : if( !isCairoRenderable(aFontData.back().first) )
396 : {
397 0 : bCairoRenderable = false;
398 : OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): VCL FALLBACK %s%s%s%s - %s",
399 : maLogicalAdvancements.getLength() ? "ADV " : "",
400 : aFontData.back().first.bAntialias ? "AA " : "",
401 : aFontData.back().first.bFakeBold ? "FB " : "",
402 : aFontData.back().first.bFakeItalic ? "FI " : "",
403 : OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ),
404 : RTL_TEXTENCODING_UTF8 ).getStr());
405 0 : break;
406 : }
407 : }
408 : }
409 :
410 : // The ::GetSysTextLayoutData(), i.e. layouting of text to glyphs can change the font being used.
411 : // The fallback checks need to be done after final font is known.
412 0 : if (!bCairoRenderable) // VCL FALLBACKS
413 : {
414 0 : if (maLogicalAdvancements.getLength()) // VCL FALLBACK - with glyph advances
415 : {
416 0 : rOutDev.DrawTextArray( rOutpos, maText.Text, aOffsets.get(),
417 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
418 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
419 0 : return true;
420 : }
421 : else // VCL FALLBACK - without advances
422 : {
423 : rOutDev.DrawText( rOutpos, maText.Text,
424 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.StartPosition),
425 0 : ::canvas::tools::numeric_cast<sal_uInt16>(maText.Length) );
426 0 : return true;
427 : }
428 : }
429 :
430 0 : if (aSysLayoutData.rGlyphData.empty())
431 0 : return false; //??? false?
432 :
433 : /**
434 : * Setup platform independent glyph vector into cairo-based glyphs vector.
435 : **/
436 :
437 : // Loop through the fonts used and render the matching glyphs for each
438 0 : FontLevelVector::const_iterator aFontDataIter = aFontData.begin();
439 0 : const FontLevelVector::const_iterator aFontDataEnd = aFontData.end();
440 0 : for( ; aFontDataIter != aFontDataEnd; ++aFontDataIter )
441 : {
442 0 : const SystemFontData &rSysFontData = aFontDataIter->first;
443 :
444 : // setup glyphs
445 0 : std::vector<cairo_glyph_t> cairo_glyphs;
446 0 : cairo_glyphs.reserve( 256 );
447 :
448 0 : aGlyphIter=aSysLayoutData.rGlyphData.begin();
449 0 : for( ; aGlyphIter != aGlyphEnd; ++aGlyphIter )
450 : {
451 0 : SystemGlyphData systemGlyph = *aGlyphIter;
452 0 : if( systemGlyph.fallbacklevel != aFontDataIter->second )
453 0 : continue;
454 :
455 : cairo_glyph_t aGlyph;
456 0 : aGlyph.index = systemGlyph.index;
457 : #ifdef CAIRO_HAS_WIN32_SURFACE
458 : // Cairo requires standard glyph indexes (ETO_GLYPH_INDEX), while vcl/win/* uses ucs4 chars.
459 : // Convert to standard indexes
460 : aGlyph.index = cairo::ucs4toindex((unsigned int) aGlyph.index, rSysFontData.hFont);
461 : #endif
462 0 : aGlyph.x = systemGlyph.x;
463 0 : aGlyph.y = systemGlyph.y;
464 0 : cairo_glyphs.push_back(aGlyph);
465 : }
466 :
467 0 : if (cairo_glyphs.empty())
468 0 : continue;
469 :
470 : /**
471 : * Setup font
472 : **/
473 0 : cairo_font_face_t* font_face = NULL;
474 :
475 : #ifdef CAIRO_HAS_QUARTZ_SURFACE
476 : # ifdef QUARTZ
477 : // TODO: use cairo_quartz_font_face_create_for_cgfont(cgFont)
478 : // when CGFont (Mac OS X 10.5 API) is provided by the AQUA VCL backend.
479 : font_face = cairo_quartz_font_face_create_for_atsu_font_id((ATSUFontID) rSysFontData.aATSUFontID);
480 : # else // iOS
481 : font_face = cairo_quartz_font_face_create_for_cgfont( CTFontCopyGraphicsFont( rSysFontData.rCTFont, NULL ) );
482 : # endif
483 :
484 : #elif defined CAIRO_HAS_WIN32_SURFACE
485 : # if (OSL_DEBUG_LEVEL > 1)
486 : GetObjectW( rSysFontData.hFont, sizeof(logfont), &logfont );
487 : # endif
488 : // Note: cairo library uses logfont fallbacks when lfEscapement, lfOrientation and lfWidth are not zero.
489 : // VCL always has non-zero value for lfWidth
490 : font_face = cairo_win32_font_face_create_for_hfont(rSysFontData.hFont);
491 :
492 : #elif defined CAIRO_HAS_XLIB_SURFACE
493 : font_face = cairo_ft_font_face_create_for_ft_face((FT_Face)rSysFontData.nFontId,
494 0 : rSysFontData.nFontFlags);
495 : #else
496 : # error Native API needed.
497 : #endif
498 :
499 0 : CairoSharedPtr pSCairo = pSurface->getCairo();
500 :
501 0 : cairo_set_font_face( pSCairo.get(), font_face);
502 :
503 : // create default font options. cairo_get_font_options() does not retrieve the surface defaults,
504 : // only what has been set before with cairo_set_font_options()
505 0 : cairo_font_options_t* options = cairo_font_options_create();
506 0 : if (rSysFontData.bAntialias)
507 : {
508 : // CAIRO_ANTIALIAS_GRAY provides more similar result to VCL Canvas,
509 : // so we're not using CAIRO_ANTIALIAS_SUBPIXEL
510 0 : cairo_font_options_set_antialias(options, CAIRO_ANTIALIAS_GRAY);
511 : }
512 0 : cairo_set_font_options( pSCairo.get(), options);
513 :
514 : // Font color
515 0 : Color mTextColor = rOutDev.GetTextColor();
516 : cairo_set_source_rgb(pSCairo.get(),
517 0 : mTextColor.GetRed()/255.0,
518 0 : mTextColor.GetGreen()/255.0,
519 0 : mTextColor.GetBlue()/255.0);
520 :
521 : // Font rotation and scaling
522 : cairo_matrix_t m;
523 0 : Font aFont = rOutDev.GetFont();
524 :
525 0 : cairo_matrix_init_identity(&m);
526 :
527 0 : if (aSysLayoutData.orientation)
528 0 : cairo_matrix_rotate(&m, (3600 - aSysLayoutData.orientation) * M_PI / 1800.0);
529 :
530 0 : cairo_matrix_scale(&m, aFont.GetWidth(), aFont.GetHeight());
531 :
532 : //faux italics
533 0 : if (rSysFontData.bFakeItalic)
534 0 : m.xy = -m.xx * 0x6000L / 0x10000L;
535 :
536 0 : cairo_set_font_matrix(pSCairo.get(), &m);
537 :
538 : #if (defined CAIRO_HAS_WIN32_SURFACE) && (OSL_DEBUG_LEVEL > 1)
539 : # define TEMP_TRACE_FONT OUStringToOString( reinterpret_cast<const sal_Unicode*> (logfont.lfFaceName), RTL_TEXTENCODING_UTF8 ).getStr()
540 : #else
541 : # define TEMP_TRACE_FONT OUStringToOString( aFont.GetName(), RTL_TEXTENCODING_UTF8 ).getStr()
542 : #endif
543 : 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",
544 : aFont.GetWidth(),
545 : aFont.GetHeight(),
546 : (int) rOutpos.X(),
547 : (int) rOutpos.Y(),
548 : cairo_glyphs.size() > 0 ? cairo_glyphs[0].index : -1,
549 : cairo_glyphs.size() > 1 ? cairo_glyphs[1].index : -1,
550 : cairo_glyphs.size() > 2 ? cairo_glyphs[2].index : -1,
551 : maLogicalAdvancements.getLength() ? "ADV " : "",
552 : rSysFontData.bAntialias ? "AA " : "",
553 : rSysFontData.bFakeBold ? "FB " : "",
554 : rSysFontData.bFakeItalic ? "FI " : "",
555 : TEMP_TRACE_FONT,
556 : OUStringToOString( maText.Text.copy( maText.StartPosition, maText.Length ),
557 : RTL_TEXTENCODING_UTF8 ).getStr()
558 : );
559 : #undef TEMP_TRACE_FONT
560 :
561 0 : cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
562 :
563 : //faux bold
564 0 : if (rSysFontData.bFakeBold)
565 : {
566 0 : double bold_dx = 0.5 * sqrt( 0.7 * aFont.GetHeight() );
567 0 : int total_steps = 1 * ((int) (bold_dx + 0.5));
568 :
569 : // loop to draw the text for every half pixel of displacement
570 0 : for (int nSteps = 0; nSteps < total_steps; nSteps++)
571 : {
572 0 : for(int nGlyphIdx = 0; nGlyphIdx < (int) cairo_glyphs.size(); nGlyphIdx++)
573 : {
574 0 : cairo_glyphs[nGlyphIdx].x += (bold_dx * nSteps / total_steps) / 4;
575 0 : cairo_glyphs[nGlyphIdx].y -= (bold_dx * nSteps / total_steps) / 4;
576 : }
577 0 : cairo_show_glyphs(pSCairo.get(), &cairo_glyphs[0], cairo_glyphs.size());
578 : }
579 : OSL_TRACE(":cairocanvas::TextLayout::draw(S,O,p,v,r): FAKEBOLD - dx:%d", (int) bold_dx);
580 : }
581 :
582 0 : cairo_restore( pSCairo.get() );
583 0 : cairo_font_face_destroy(font_face);
584 0 : }
585 0 : return true;
586 : }
587 :
588 :
589 : namespace
590 : {
591 0 : class OffsetTransformer
592 : {
593 : public:
594 0 : OffsetTransformer( const ::basegfx::B2DHomMatrix& rMat ) :
595 0 : maMatrix( rMat )
596 : {
597 0 : }
598 :
599 0 : sal_Int32 operator()( const double& rOffset )
600 : {
601 : // This is an optimization of the normal rMat*[x,0]
602 : // transformation of the advancement vector (in x
603 : // direction), followed by a length calculation of the
604 : // resulting vector: advancement' =
605 : // ||rMat*[x,0]||. Since advancements are vectors, we
606 : // can ignore translational components, thus if [x,0],
607 : // it follows that rMat*[x,0]=[x',0] holds. Thus, we
608 : // just have to calc the transformation of the x
609 : // component.
610 :
611 : // TODO(F2): Handle non-horizontal advancements!
612 0 : return ::basegfx::fround( hypot(maMatrix.get(0,0)*rOffset,
613 0 : maMatrix.get(1,0)*rOffset) );
614 : }
615 :
616 : private:
617 : ::basegfx::B2DHomMatrix maMatrix;
618 : };
619 : }
620 :
621 0 : void TextLayout::setupTextOffsets( sal_Int32* outputOffsets,
622 : const uno::Sequence< double >& inputOffsets,
623 : const rendering::ViewState& viewState,
624 : const rendering::RenderState& renderState ) const
625 : {
626 0 : ENSURE_OR_THROW( outputOffsets!=NULL,
627 : "TextLayout::setupTextOffsets offsets NULL" );
628 :
629 0 : ::basegfx::B2DHomMatrix aMatrix;
630 :
631 : ::canvas::tools::mergeViewAndRenderTransform(aMatrix,
632 : viewState,
633 0 : renderState);
634 :
635 : // fill integer offsets
636 : ::std::transform( const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray(),
637 0 : const_cast< uno::Sequence< double >& >(inputOffsets).getConstArray()+inputOffsets.getLength(),
638 : outputOffsets,
639 0 : OffsetTransformer( aMatrix ) );
640 0 : }
641 :
642 : #define SERVICE_NAME "com.sun.star.rendering.TextLayout"
643 : #define IMPLEMENTATION_NAME "CairoCanvas::TextLayout"
644 :
645 0 : OUString SAL_CALL TextLayout::getImplementationName() throw( uno::RuntimeException )
646 : {
647 0 : return OUString( IMPLEMENTATION_NAME );
648 : }
649 :
650 0 : sal_Bool SAL_CALL TextLayout::supportsService( const OUString& ServiceName ) throw( uno::RuntimeException )
651 : {
652 0 : return ServiceName == SERVICE_NAME;
653 : }
654 :
655 0 : uno::Sequence< OUString > SAL_CALL TextLayout::getSupportedServiceNames() throw( uno::RuntimeException )
656 : {
657 0 : uno::Sequence< OUString > aRet(1);
658 0 : aRet[0] = OUString( SERVICE_NAME );
659 :
660 0 : return aRet;
661 : }
662 0 : }
663 :
664 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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