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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 : vcl::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 0 : ::canvas::tools::clipOutDev(viewState, renderState, rOutDev);
131 :
132 0 : if( eColorType != IGNORE_COLOR )
133 : {
134 0 : Color aColor( COL_WHITE );
135 :
136 0 : if( renderState.DeviceColor.getLength() > 2 )
137 : {
138 0 : aColor = vcl::unotools::stdColorSpaceSequenceToColor( renderState.DeviceColor );
139 : }
140 :
141 : // extract alpha, and make color opaque
142 : // afterwards. Otherwise, OutputDevice won't draw anything
143 0 : nTransparency = aColor.GetTransparency();
144 0 : aColor.SetTransparency(0);
145 :
146 0 : switch( eColorType )
147 : {
148 : case LINE_COLOR:
149 0 : rOutDev.SetLineColor( aColor );
150 0 : rOutDev.SetFillColor();
151 :
152 0 : break;
153 :
154 : case FILL_COLOR:
155 0 : rOutDev.SetFillColor( aColor );
156 0 : rOutDev.SetLineColor();
157 :
158 0 : break;
159 :
160 : case TEXT_COLOR:
161 0 : rOutDev.SetTextColor( aColor );
162 :
163 0 : break;
164 :
165 : default:
166 0 : ENSURE_OR_THROW( false,
167 : "CanvasHelper::setupOutDevState(): Unexpected color type");
168 : break;
169 : }
170 : }
171 :
172 0 : return nTransparency;
173 : }
174 :
175 : class DeviceSettingsGuard
176 : {
177 : private:
178 : VclPtr<OutputDevice> mpVirtualDevice;
179 : cairo_t *mpCairo;
180 : bool mbMappingWasEnabled;
181 : public:
182 0 : DeviceSettingsGuard(OutputDevice *pVirtualDevice, cairo_t *pCairo)
183 : : mpVirtualDevice(pVirtualDevice)
184 : , mpCairo(pCairo)
185 0 : , mbMappingWasEnabled(mpVirtualDevice->IsMapModeEnabled())
186 : {
187 0 : cairo_save(mpCairo);
188 0 : mpVirtualDevice->Push();
189 0 : mpVirtualDevice->EnableMapMode(false);
190 0 : }
191 :
192 0 : ~DeviceSettingsGuard()
193 0 : {
194 0 : mpVirtualDevice->EnableMapMode(mbMappingWasEnabled);
195 0 : mpVirtualDevice->Pop();
196 0 : cairo_restore(mpCairo);
197 0 : }
198 : };
199 :
200 0 : bool setupTextOutput( OutputDevice& rOutDev,
201 : const rendering::XCanvas* pOwner,
202 : ::Point& o_rOutPos,
203 : const rendering::ViewState& viewState,
204 : const rendering::RenderState& renderState,
205 : const uno::Reference< rendering::XCanvasFont >& xFont )
206 : {
207 0 : setupOutDevState( rOutDev, pOwner, viewState, renderState, TEXT_COLOR );
208 :
209 0 : CanvasFont* pFont = dynamic_cast< CanvasFont* >( xFont.get() );
210 :
211 0 : ENSURE_ARG_OR_THROW( pFont,
212 : "CanvasHelper::setupTextOutput(): Font not compatible with this canvas" );
213 :
214 0 : vcl::Font aVCLFont = pFont->getVCLFont();
215 :
216 0 : Color aColor( COL_BLACK );
217 :
218 0 : if( renderState.DeviceColor.getLength() > 2 )
219 : {
220 0 : aColor = vcl::unotools::stdColorSpaceSequenceToColor(renderState.DeviceColor );
221 : }
222 :
223 : // setup font color
224 0 : aVCLFont.SetColor( aColor );
225 0 : aVCLFont.SetFillColor( aColor );
226 :
227 : // no need to replicate this for mp2ndOutDev, we're modifying only aVCLFont here.
228 0 : if( !setupFontTransform( rOutDev, o_rOutPos, aVCLFont, viewState, renderState ) )
229 0 : return false;
230 :
231 0 : rOutDev.SetFont( aVCLFont );
232 :
233 0 : return true;
234 : }
235 :
236 : //set the clip of the rOutDev to the cairo surface
237 0 : void CanvasHelper::clip_cairo_from_dev(::OutputDevice& rOutDev)
238 : {
239 0 : vcl::Region aRegion(rOutDev.GetClipRegion());
240 0 : if (!aRegion.IsEmpty() && !aRegion.IsNull())
241 : {
242 : doPolyPolygonImplementation(aRegion.GetAsB2DPolyPolygon(), Clip, mpCairo.get(),
243 0 : NULL, mpSurfaceProvider, rendering::FillRule_EVEN_ODD);
244 0 : }
245 0 : }
246 :
247 0 : uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawText( const rendering::XCanvas* pOwner,
248 : const rendering::StringContext& text,
249 : const uno::Reference< rendering::XCanvasFont >& xFont,
250 : const rendering::ViewState& viewState,
251 : const rendering::RenderState& renderState,
252 : sal_Int8 textDirection )
253 : {
254 : #ifdef CAIRO_CANVAS_PERF_TRACE
255 : struct timespec aTimer;
256 : mxDevice->startPerfTrace( &aTimer );
257 : #endif
258 :
259 0 : ENSURE_ARG_OR_THROW( xFont.is(),
260 : "CanvasHelper::drawText(): font is NULL");
261 :
262 0 : if( !mpVirtualDevice )
263 0 : mpVirtualDevice = mpSurface->createVirtualDevice();
264 :
265 0 : if( mpVirtualDevice )
266 : {
267 0 : DeviceSettingsGuard aGuard(mpVirtualDevice.get(), mpCairo.get());
268 :
269 : #if defined CAIRO_HAS_WIN32_SURFACE
270 : // FIXME: Some kind of work-araound...
271 : cairo_rectangle (mpCairo.get(), 0, 0, 0, 0);
272 : cairo_fill(mpCairo.get());
273 : #endif
274 0 : ::Point aOutpos;
275 0 : if( !setupTextOutput( *mpVirtualDevice.get(), pOwner, aOutpos, viewState, renderState, xFont ) )
276 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
277 :
278 : // change text direction and layout mode
279 0 : ComplexTextLayoutMode nLayoutMode(TEXT_LAYOUT_DEFAULT);
280 0 : switch( textDirection )
281 : {
282 : case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
283 : // FALLTHROUGH intended
284 : case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
285 0 : nLayoutMode |= TEXT_LAYOUT_BIDI_STRONG;
286 0 : nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_LEFT;
287 0 : break;
288 :
289 : case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
290 0 : nLayoutMode |= TEXT_LAYOUT_BIDI_RTL;
291 : // FALLTHROUGH intended
292 : case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
293 0 : nLayoutMode |= TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG;
294 0 : nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_RIGHT;
295 0 : break;
296 : }
297 :
298 : // TODO(F2): alpha
299 0 : mpVirtualDevice->SetLayoutMode( nLayoutMode );
300 :
301 0 : clip_cairo_from_dev(*mpVirtualDevice);
302 :
303 : OSL_TRACE(":cairocanvas::CanvasHelper::drawText(O,t,f,v,r,d): %s", OUStringToOString( text.Text.copy( text.StartPosition, text.Length ),
304 : RTL_TEXTENCODING_UTF8 ).getStr());
305 :
306 0 : rtl::Reference< TextLayout > pTextLayout( new TextLayout(text, textDirection, 0, CanvasFont::Reference(dynamic_cast< CanvasFont* >( xFont.get() )), mpSurfaceProvider) );
307 0 : pTextLayout->draw(mpCairo, *mpVirtualDevice, aOutpos, viewState, renderState);
308 : }
309 :
310 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL);
311 : }
312 :
313 0 : uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawTextLayout( const rendering::XCanvas* pOwner,
314 : const uno::Reference< rendering::XTextLayout >& xLayoutedText,
315 : const rendering::ViewState& viewState,
316 : const rendering::RenderState& renderState )
317 : {
318 0 : ENSURE_ARG_OR_THROW( xLayoutedText.is(),
319 : "CanvasHelper::drawTextLayout(): layout is NULL");
320 :
321 0 : TextLayout* pTextLayout = dynamic_cast< TextLayout* >( xLayoutedText.get() );
322 :
323 0 : if( pTextLayout )
324 : {
325 0 : if( !mpVirtualDevice )
326 0 : mpVirtualDevice = mpSurface->createVirtualDevice();
327 :
328 0 : if( mpVirtualDevice )
329 : {
330 0 : DeviceSettingsGuard aGuard(mpVirtualDevice.get(), mpCairo.get());
331 :
332 : #if defined CAIRO_HAS_WIN32_SURFACE
333 : // FIXME: Some kind of work-araound...
334 : cairo_rectangle(mpCairo.get(), 0, 0, 0, 0);
335 : cairo_fill(mpCairo.get());
336 : #endif
337 : // TODO(T3): Race condition. We're taking the font
338 : // from xLayoutedText, and then calling draw() at it,
339 : // without exclusive access. Move setupTextOutput(),
340 : // e.g. to impltools?
341 :
342 0 : ::Point aOutpos;
343 0 : if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xLayoutedText->getFont() ) )
344 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
345 :
346 0 : clip_cairo_from_dev(*mpVirtualDevice);
347 :
348 : // TODO(F2): What about the offset scalings?
349 0 : pTextLayout->draw(mpCairo, *mpVirtualDevice, aOutpos, viewState, renderState);
350 : }
351 : }
352 : else
353 : {
354 0 : ENSURE_ARG_OR_THROW( false,
355 : "CanvasHelper::drawTextLayout(): TextLayout not compatible with this canvas" );
356 : }
357 :
358 0 : return uno::Reference< rendering::XCachedPrimitive >(NULL);
359 : }
360 :
361 6 : }
362 :
363 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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