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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 <canvas/debug.hxx>
21 : #include <canvas/canvastools.hxx>
22 : #include <tools/diagnose_ex.h>
23 :
24 : #include <vcl/virdev.hxx>
25 : #include <vcl/metric.hxx>
26 : #include <vcl/canvastools.hxx>
27 :
28 : #include <basegfx/polygon/b2dpolypolygon.hxx>
29 : #include <basegfx/tools/canvastools.hxx>
30 :
31 : #include "cairo_canvasfont.hxx"
32 : #include "cairo_textlayout.hxx"
33 : #include "cairo_canvashelper.hxx"
34 :
35 : using namespace ::cairo;
36 : using namespace ::com::sun::star;
37 :
38 : namespace cairocanvas
39 : {
40 : enum ColorType
41 : {
42 : LINE_COLOR, FILL_COLOR, TEXT_COLOR, IGNORE_COLOR
43 : };
44 :
45 0 : uno::Reference< rendering::XCanvasFont > CanvasHelper::createFont( const rendering::XCanvas* ,
46 : const rendering::FontRequest& fontRequest,
47 : const uno::Sequence< beans::PropertyValue >& extraFontProperties,
48 : const geometry::Matrix2D& fontMatrix )
49 : {
50 0 : return uno::Reference< rendering::XCanvasFont >( new CanvasFont( fontRequest, extraFontProperties, fontMatrix, mpSurfaceProvider ));
51 : }
52 :
53 0 : uno::Sequence< rendering::FontInfo > CanvasHelper::queryAvailableFonts( const rendering::XCanvas* ,
54 : const rendering::FontInfo& /*aFilter*/,
55 : const uno::Sequence< beans::PropertyValue >& /*aFontProperties*/ )
56 : {
57 : // TODO
58 0 : return uno::Sequence< rendering::FontInfo >();
59 : }
60 :
61 : static bool
62 0 : setupFontTransform( ::OutputDevice& rOutDev,
63 : ::Point& o_rPoint,
64 : ::Font& io_rVCLFont,
65 : const rendering::ViewState& rViewState,
66 : const rendering::RenderState& rRenderState )
67 : {
68 0 : ::basegfx::B2DHomMatrix aMatrix;
69 :
70 : ::canvas::tools::mergeViewAndRenderTransform(aMatrix,
71 : rViewState,
72 0 : rRenderState);
73 :
74 0 : ::basegfx::B2DTuple aScale;
75 0 : ::basegfx::B2DTuple aTranslate;
76 : double nRotate, nShearX;
77 :
78 0 : aMatrix.decompose( aScale, aTranslate, nRotate, nShearX );
79 :
80 : // query font metric _before_ tampering with width and height
81 0 : if( !::rtl::math::approxEqual(aScale.getX(), aScale.getY()) )
82 : {
83 : // retrieve true font width
84 0 : const sal_Int32 nFontWidth( rOutDev.GetFontMetric( io_rVCLFont ).GetWidth() );
85 :
86 0 : const sal_Int32 nScaledFontWidth( ::basegfx::fround(nFontWidth * aScale.getX()) );
87 :
88 0 : if( !nScaledFontWidth )
89 : {
90 : // scale is smaller than one pixel - disable text
91 : // output altogether
92 0 : return false;
93 : }
94 :
95 0 : io_rVCLFont.SetWidth( nScaledFontWidth );
96 : }
97 :
98 0 : if( !::rtl::math::approxEqual(aScale.getY(), 1.0) )
99 : {
100 0 : const sal_Int32 nFontHeight( io_rVCLFont.GetHeight() );
101 0 : io_rVCLFont.SetHeight( ::basegfx::fround(nFontHeight * aScale.getY()) );
102 : }
103 :
104 0 : io_rVCLFont.SetOrientation( static_cast< short >( ::basegfx::fround(-fmod(nRotate, 2*M_PI)*(1800.0/M_PI)) ) );
105 :
106 : // TODO(F2): Missing functionality in VCL: shearing
107 0 : o_rPoint.X() = ::basegfx::fround(aTranslate.getX());
108 0 : o_rPoint.Y() = ::basegfx::fround(aTranslate.getY());
109 :
110 0 : return true;
111 : }
112 :
113 : static int
114 0 : setupOutDevState( OutputDevice& rOutDev,
115 : const rendering::XCanvas* pOwner,
116 : const rendering::ViewState& viewState,
117 : const rendering::RenderState& renderState,
118 : ColorType eColorType )
119 : {
120 : ::canvas::tools::verifyInput( renderState,
121 : BOOST_CURRENT_FUNCTION,
122 : const_cast<rendering::XCanvas*>(pOwner), // only for refcount
123 : 2,
124 0 : eColorType == IGNORE_COLOR ? 0 : 3 );
125 :
126 0 : int nTransparency(0);
127 :
128 : // TODO(P2): Don't change clipping all the time, maintain current clip
129 : // state and change only when update is necessary
130 :
131 : // accumulate non-empty clips into one region
132 : // ==========================================
133 :
134 0 : Region aClipRegion;
135 :
136 0 : if( viewState.Clip.is() )
137 : {
138 : ::basegfx::B2DPolyPolygon aClipPoly(
139 : ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
140 0 : viewState.Clip) );
141 :
142 0 : if( aClipPoly.count() )
143 : {
144 : // setup non-empty clipping
145 0 : ::basegfx::B2DHomMatrix aMatrix;
146 : aClipPoly.transform(
147 : ::basegfx::unotools::homMatrixFromAffineMatrix( aMatrix,
148 0 : viewState.AffineTransform ) );
149 :
150 0 : aClipRegion = Region::GetRegionFromPolyPolygon( ::PolyPolygon( aClipPoly ) );
151 0 : }
152 : }
153 :
154 0 : if( renderState.Clip.is() )
155 : {
156 : ::basegfx::B2DPolyPolygon aClipPoly(
157 : ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
158 0 : renderState.Clip) );
159 :
160 0 : ::basegfx::B2DHomMatrix aMatrix;
161 : aClipPoly.transform(
162 : ::canvas::tools::mergeViewAndRenderTransform( aMatrix,
163 : viewState,
164 0 : renderState ) );
165 :
166 0 : if( aClipPoly.count() )
167 : {
168 : // setup non-empty clipping
169 0 : Region aRegion = Region::GetRegionFromPolyPolygon( ::PolyPolygon( aClipPoly ) );
170 :
171 0 : if( aClipRegion.IsEmpty() )
172 0 : aClipRegion = aRegion;
173 : else
174 0 : aClipRegion.Intersect( aRegion );
175 : }
176 : else
177 : {
178 : // clip polygon is empty
179 0 : aClipRegion.SetEmpty();
180 0 : }
181 : }
182 :
183 : // setup accumulated clip region. Note that setting an
184 : // empty clip region denotes "clip everything" on the
185 : // OutputDevice (which is why we translate that into
186 : // SetClipRegion() here). When both view and render clip
187 : // are empty, aClipRegion remains default-constructed,
188 : // i.e. empty, too.
189 0 : if( aClipRegion.IsEmpty() )
190 : {
191 0 : rOutDev.SetClipRegion();
192 : }
193 : else
194 : {
195 0 : rOutDev.SetClipRegion( aClipRegion );
196 : }
197 :
198 0 : if( eColorType != IGNORE_COLOR )
199 : {
200 0 : Color aColor( COL_WHITE );
201 :
202 0 : if( renderState.DeviceColor.getLength() > 2 )
203 : {
204 0 : aColor = ::vcl::unotools::stdColorSpaceSequenceToColor( renderState.DeviceColor );
205 : }
206 :
207 : // extract alpha, and make color opaque
208 : // afterwards. Otherwise, OutputDevice won't draw anything
209 0 : nTransparency = aColor.GetTransparency();
210 0 : aColor.SetTransparency(0);
211 :
212 0 : switch( eColorType )
213 : {
214 : case LINE_COLOR:
215 0 : rOutDev.SetLineColor( aColor );
216 0 : rOutDev.SetFillColor();
217 :
218 0 : break;
219 :
220 : case FILL_COLOR:
221 0 : rOutDev.SetFillColor( aColor );
222 0 : rOutDev.SetLineColor();
223 :
224 0 : break;
225 :
226 : case TEXT_COLOR:
227 0 : rOutDev.SetTextColor( aColor );
228 :
229 0 : break;
230 :
231 : default:
232 0 : ENSURE_OR_THROW( false,
233 : "CanvasHelper::setupOutDevState(): Unexpected color type");
234 : break;
235 : }
236 : }
237 :
238 0 : return nTransparency;
239 : }
240 :
241 0 : bool setupTextOutput( OutputDevice& rOutDev,
242 : const rendering::XCanvas* pOwner,
243 : ::Point& o_rOutPos,
244 : const rendering::ViewState& viewState,
245 : const rendering::RenderState& renderState,
246 : const uno::Reference< rendering::XCanvasFont >& xFont )
247 : {
248 0 : setupOutDevState( rOutDev, pOwner, viewState, renderState, TEXT_COLOR );
249 :
250 0 : ::Font aVCLFont;
251 :
252 0 : CanvasFont* pFont = dynamic_cast< CanvasFont* >( xFont.get() );
253 :
254 0 : ENSURE_ARG_OR_THROW( pFont,
255 : "CanvasHelper::setupTextOutput(): Font not compatible with this canvas" );
256 :
257 0 : aVCLFont = pFont->getVCLFont();
258 :
259 0 : Color aColor( COL_BLACK );
260 :
261 0 : if( renderState.DeviceColor.getLength() > 2 )
262 : {
263 0 : aColor = ::vcl::unotools::stdColorSpaceSequenceToColor(renderState.DeviceColor );
264 : }
265 :
266 : // setup font color
267 0 : aVCLFont.SetColor( aColor );
268 0 : aVCLFont.SetFillColor( aColor );
269 :
270 : // no need to replicate this for mp2ndOutDev, we're modifying only aVCLFont here.
271 0 : if( !setupFontTransform( rOutDev, o_rOutPos, aVCLFont, viewState, renderState ) )
272 0 : return false;
273 :
274 0 : rOutDev.SetFont( aVCLFont );
275 :
276 :
277 0 : return true;
278 : }
279 :
280 0 : uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawText( const rendering::XCanvas* pOwner,
281 : const rendering::StringContext& text,
282 : const uno::Reference< rendering::XCanvasFont >& xFont,
283 : const rendering::ViewState& viewState,
284 : const rendering::RenderState& renderState,
285 : sal_Int8 textDirection )
286 : {
287 : #ifdef CAIRO_CANVAS_PERF_TRACE
288 : struct timespec aTimer;
289 : mxDevice->startPerfTrace( &aTimer );
290 : #endif
291 :
292 0 : ENSURE_ARG_OR_THROW( xFont.is(),
293 : "CanvasHelper::drawText(): font is NULL");
294 :
295 0 : if( !mpVirtualDevice )
296 0 : mpVirtualDevice = mpSurface->createVirtualDevice();
297 :
298 0 : if( mpVirtualDevice )
299 : {
300 : #if defined CAIRO_HAS_WIN32_SURFACE
301 : // FIXME: Some kind of work-araound...
302 : cairo_rectangle (mpSurface->getCairo().get(), 0, 0, 0, 0);
303 : cairo_fill(mpSurface->getCairo().get());
304 : #endif
305 0 : ::Point aOutpos;
306 0 : if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xFont ) )
307 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
308 :
309 : // change text direction and layout mode
310 0 : sal_uLong nLayoutMode(0);
311 0 : switch( textDirection )
312 : {
313 : case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
314 0 : nLayoutMode |= TEXT_LAYOUT_BIDI_LTR;
315 : // FALLTHROUGH intended
316 : case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
317 0 : nLayoutMode |= TEXT_LAYOUT_BIDI_LTR | TEXT_LAYOUT_BIDI_STRONG;
318 0 : nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_LEFT;
319 0 : break;
320 :
321 : case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
322 0 : nLayoutMode |= TEXT_LAYOUT_BIDI_RTL;
323 : // FALLTHROUGH intended
324 : case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
325 0 : nLayoutMode |= TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG;
326 0 : nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_RIGHT;
327 0 : break;
328 : }
329 :
330 : // TODO(F2): alpha
331 0 : mpVirtualDevice->SetLayoutMode( nLayoutMode );
332 :
333 : OSL_TRACE(":cairocanvas::CanvasHelper::drawText(O,t,f,v,r,d): %s", OUStringToOString( text.Text.copy( text.StartPosition, text.Length ),
334 : RTL_TEXTENCODING_UTF8 ).getStr());
335 :
336 0 : TextLayout* pTextLayout = new TextLayout(text, textDirection, 0, CanvasFont::Reference(dynamic_cast< CanvasFont* >( xFont.get() )), mpSurfaceProvider);
337 0 : pTextLayout->draw( mpSurface, *mpVirtualDevice, aOutpos, viewState, renderState );
338 : }
339 :
340 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL);
341 : }
342 :
343 0 : uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawTextLayout( const rendering::XCanvas* pOwner,
344 : const uno::Reference< rendering::XTextLayout >& xLayoutedText,
345 : const rendering::ViewState& viewState,
346 : const rendering::RenderState& renderState )
347 : {
348 0 : ENSURE_ARG_OR_THROW( xLayoutedText.is(),
349 : "CanvasHelper::drawTextLayout(): layout is NULL");
350 :
351 0 : TextLayout* pTextLayout = dynamic_cast< TextLayout* >( xLayoutedText.get() );
352 :
353 0 : if( pTextLayout )
354 : {
355 0 : if( !mpVirtualDevice )
356 0 : mpVirtualDevice = mpSurface->createVirtualDevice();
357 :
358 0 : if( mpVirtualDevice )
359 : {
360 : #if defined CAIRO_HAS_WIN32_SURFACE
361 : // FIXME: Some kind of work-araound...
362 : cairo_rectangle( mpSurface->getCairo().get(), 0, 0, 0, 0);
363 : cairo_fill(mpSurface->getCairo().get());
364 : #endif
365 : // TODO(T3): Race condition. We're taking the font
366 : // from xLayoutedText, and then calling draw() at it,
367 : // without exclusive access. Move setupTextOutput(),
368 : // e.g. to impltools?
369 :
370 0 : ::Point aOutpos;
371 0 : if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xLayoutedText->getFont() ) )
372 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
373 :
374 : // TODO(F2): What about the offset scalings?
375 0 : pTextLayout->draw( mpSurface, *mpVirtualDevice, aOutpos, viewState, renderState );
376 : }
377 : }
378 : else
379 : {
380 0 : ENSURE_ARG_OR_THROW( false,
381 : "CanvasHelper::drawTextLayout(): TextLayout not compatible with this canvas" );
382 : }
383 :
384 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL);
385 : }
386 :
387 0 : }
388 :
389 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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