1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <canvas/debug.hxx>
#include <canvas/canvastools.hxx>
#include <tools/diagnose_ex.h>
#include <vcl/virdev.hxx>
#include <vcl/metric.hxx>
#include <vcl/canvastools.hxx>
#include <basegfx/polygon/b2dpolypolygon.hxx>
#include <basegfx/tools/canvastools.hxx>
#include "cairo_canvasfont.hxx"
#include "cairo_textlayout.hxx"
#include "cairo_canvashelper.hxx"
using namespace ::cairo;
using namespace ::com::sun::star;
namespace cairocanvas
{
enum ColorType
{
LINE_COLOR, FILL_COLOR, TEXT_COLOR, IGNORE_COLOR
};
uno::Reference< rendering::XCanvasFont > CanvasHelper::createFont( const rendering::XCanvas* ,
const rendering::FontRequest& fontRequest,
const uno::Sequence< beans::PropertyValue >& extraFontProperties,
const geometry::Matrix2D& fontMatrix )
{
return uno::Reference< rendering::XCanvasFont >( new CanvasFont( fontRequest, extraFontProperties, fontMatrix, mpSurfaceProvider ));
}
uno::Sequence< rendering::FontInfo > CanvasHelper::queryAvailableFonts( const rendering::XCanvas* ,
const rendering::FontInfo& /*aFilter*/,
const uno::Sequence< beans::PropertyValue >& /*aFontProperties*/ )
{
// TODO
return uno::Sequence< rendering::FontInfo >();
}
static bool
setupFontTransform( ::OutputDevice& rOutDev,
::Point& o_rPoint,
::Font& io_rVCLFont,
const rendering::ViewState& rViewState,
const rendering::RenderState& rRenderState )
{
::basegfx::B2DHomMatrix aMatrix;
::canvas::tools::mergeViewAndRenderTransform(aMatrix,
rViewState,
rRenderState);
::basegfx::B2DTuple aScale;
::basegfx::B2DTuple aTranslate;
double nRotate, nShearX;
aMatrix.decompose( aScale, aTranslate, nRotate, nShearX );
// query font metric _before_ tampering with width and height
if( !::rtl::math::approxEqual(aScale.getX(), aScale.getY()) )
{
// retrieve true font width
const sal_Int32 nFontWidth( rOutDev.GetFontMetric( io_rVCLFont ).GetWidth() );
const sal_Int32 nScaledFontWidth( ::basegfx::fround(nFontWidth * aScale.getX()) );
if( !nScaledFontWidth )
{
// scale is smaller than one pixel - disable text
// output altogether
return false;
}
io_rVCLFont.SetWidth( nScaledFontWidth );
}
if( !::rtl::math::approxEqual(aScale.getY(), 1.0) )
{
const sal_Int32 nFontHeight( io_rVCLFont.GetHeight() );
io_rVCLFont.SetHeight( ::basegfx::fround(nFontHeight * aScale.getY()) );
}
io_rVCLFont.SetOrientation( static_cast< short >( ::basegfx::fround(-fmod(nRotate, 2*M_PI)*(1800.0/M_PI)) ) );
// TODO(F2): Missing functionality in VCL: shearing
o_rPoint.X() = ::basegfx::fround(aTranslate.getX());
o_rPoint.Y() = ::basegfx::fround(aTranslate.getY());
return true;
}
static int
setupOutDevState( OutputDevice& rOutDev,
const rendering::XCanvas* pOwner,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState,
ColorType eColorType )
{
::canvas::tools::verifyInput( renderState,
BOOST_CURRENT_FUNCTION,
const_cast<rendering::XCanvas*>(pOwner), // only for refcount
2,
eColorType == IGNORE_COLOR ? 0 : 3 );
int nTransparency(0);
// TODO(P2): Don't change clipping all the time, maintain current clip
// state and change only when update is necessary
// accumulate non-empty clips into one region
// ==========================================
Region aClipRegion;
if( viewState.Clip.is() )
{
::basegfx::B2DPolyPolygon aClipPoly(
::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
viewState.Clip) );
if( aClipPoly.count() )
{
// setup non-empty clipping
::basegfx::B2DHomMatrix aMatrix;
aClipPoly.transform(
::basegfx::unotools::homMatrixFromAffineMatrix( aMatrix,
viewState.AffineTransform ) );
aClipRegion = Region::GetRegionFromPolyPolygon( ::PolyPolygon( aClipPoly ) );
}
}
if( renderState.Clip.is() )
{
::basegfx::B2DPolyPolygon aClipPoly(
::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
renderState.Clip) );
::basegfx::B2DHomMatrix aMatrix;
aClipPoly.transform(
::canvas::tools::mergeViewAndRenderTransform( aMatrix,
viewState,
renderState ) );
if( aClipPoly.count() )
{
// setup non-empty clipping
Region aRegion = Region::GetRegionFromPolyPolygon( ::PolyPolygon( aClipPoly ) );
if( aClipRegion.IsEmpty() )
aClipRegion = aRegion;
else
aClipRegion.Intersect( aRegion );
}
else
{
// clip polygon is empty
aClipRegion.SetEmpty();
}
}
// setup accumulated clip region. Note that setting an
// empty clip region denotes "clip everything" on the
// OutputDevice (which is why we translate that into
// SetClipRegion() here). When both view and render clip
// are empty, aClipRegion remains default-constructed,
// i.e. empty, too.
if( aClipRegion.IsEmpty() )
{
rOutDev.SetClipRegion();
}
else
{
rOutDev.SetClipRegion( aClipRegion );
}
if( eColorType != IGNORE_COLOR )
{
Color aColor( COL_WHITE );
if( renderState.DeviceColor.getLength() > 2 )
{
aColor = ::vcl::unotools::stdColorSpaceSequenceToColor( renderState.DeviceColor );
}
// extract alpha, and make color opaque
// afterwards. Otherwise, OutputDevice won't draw anything
nTransparency = aColor.GetTransparency();
aColor.SetTransparency(0);
switch( eColorType )
{
case LINE_COLOR:
rOutDev.SetLineColor( aColor );
rOutDev.SetFillColor();
break;
case FILL_COLOR:
rOutDev.SetFillColor( aColor );
rOutDev.SetLineColor();
break;
case TEXT_COLOR:
rOutDev.SetTextColor( aColor );
break;
default:
ENSURE_OR_THROW( false,
"CanvasHelper::setupOutDevState(): Unexpected color type");
break;
}
}
return nTransparency;
}
bool setupTextOutput( OutputDevice& rOutDev,
const rendering::XCanvas* pOwner,
::Point& o_rOutPos,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState,
const uno::Reference< rendering::XCanvasFont >& xFont )
{
setupOutDevState( rOutDev, pOwner, viewState, renderState, TEXT_COLOR );
::Font aVCLFont;
CanvasFont* pFont = dynamic_cast< CanvasFont* >( xFont.get() );
ENSURE_ARG_OR_THROW( pFont,
"CanvasHelper::setupTextOutput(): Font not compatible with this canvas" );
aVCLFont = pFont->getVCLFont();
Color aColor( COL_BLACK );
if( renderState.DeviceColor.getLength() > 2 )
{
aColor = ::vcl::unotools::stdColorSpaceSequenceToColor(renderState.DeviceColor );
}
// setup font color
aVCLFont.SetColor( aColor );
aVCLFont.SetFillColor( aColor );
// no need to replicate this for mp2ndOutDev, we're modifying only aVCLFont here.
if( !setupFontTransform( rOutDev, o_rOutPos, aVCLFont, viewState, renderState ) )
return false;
rOutDev.SetFont( aVCLFont );
return true;
}
uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawText( const rendering::XCanvas* pOwner,
const rendering::StringContext& text,
const uno::Reference< rendering::XCanvasFont >& xFont,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState,
sal_Int8 textDirection )
{
#ifdef CAIRO_CANVAS_PERF_TRACE
struct timespec aTimer;
mxDevice->startPerfTrace( &aTimer );
#endif
ENSURE_ARG_OR_THROW( xFont.is(),
"CanvasHelper::drawText(): font is NULL");
if( !mpVirtualDevice )
mpVirtualDevice = mpSurface->createVirtualDevice();
if( mpVirtualDevice )
{
#if defined CAIRO_HAS_WIN32_SURFACE
// FIXME: Some kind of work-araound...
cairo_rectangle (mpSurface->getCairo().get(), 0, 0, 0, 0);
cairo_fill(mpSurface->getCairo().get());
#endif
::Point aOutpos;
if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xFont ) )
return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
// change text direction and layout mode
sal_uLong nLayoutMode(0);
switch( textDirection )
{
case rendering::TextDirection::WEAK_LEFT_TO_RIGHT:
nLayoutMode |= TEXT_LAYOUT_BIDI_LTR;
// FALLTHROUGH intended
case rendering::TextDirection::STRONG_LEFT_TO_RIGHT:
nLayoutMode |= TEXT_LAYOUT_BIDI_LTR | TEXT_LAYOUT_BIDI_STRONG;
nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_LEFT;
break;
case rendering::TextDirection::WEAK_RIGHT_TO_LEFT:
nLayoutMode |= TEXT_LAYOUT_BIDI_RTL;
// FALLTHROUGH intended
case rendering::TextDirection::STRONG_RIGHT_TO_LEFT:
nLayoutMode |= TEXT_LAYOUT_BIDI_RTL | TEXT_LAYOUT_BIDI_STRONG;
nLayoutMode |= TEXT_LAYOUT_TEXTORIGIN_RIGHT;
break;
}
// TODO(F2): alpha
mpVirtualDevice->SetLayoutMode( nLayoutMode );
OSL_TRACE(":cairocanvas::CanvasHelper::drawText(O,t,f,v,r,d): %s", OUStringToOString( text.Text.copy( text.StartPosition, text.Length ),
RTL_TEXTENCODING_UTF8 ).getStr());
TextLayout* pTextLayout = new TextLayout(text, textDirection, 0, CanvasFont::Reference(dynamic_cast< CanvasFont* >( xFont.get() )), mpSurfaceProvider);
pTextLayout->draw( mpSurface, *mpVirtualDevice, aOutpos, viewState, renderState );
}
return uno::Reference< rendering::XCachedPrimitive >(NULL);
}
uno::Reference< rendering::XCachedPrimitive > CanvasHelper::drawTextLayout( const rendering::XCanvas* pOwner,
const uno::Reference< rendering::XTextLayout >& xLayoutedText,
const rendering::ViewState& viewState,
const rendering::RenderState& renderState )
{
ENSURE_ARG_OR_THROW( xLayoutedText.is(),
"CanvasHelper::drawTextLayout(): layout is NULL");
TextLayout* pTextLayout = dynamic_cast< TextLayout* >( xLayoutedText.get() );
if( pTextLayout )
{
if( !mpVirtualDevice )
mpVirtualDevice = mpSurface->createVirtualDevice();
if( mpVirtualDevice )
{
#if defined CAIRO_HAS_WIN32_SURFACE
// FIXME: Some kind of work-araound...
cairo_rectangle( mpSurface->getCairo().get(), 0, 0, 0, 0);
cairo_fill(mpSurface->getCairo().get());
#endif
// TODO(T3): Race condition. We're taking the font
// from xLayoutedText, and then calling draw() at it,
// without exclusive access. Move setupTextOutput(),
// e.g. to impltools?
::Point aOutpos;
if( !setupTextOutput( *mpVirtualDevice, pOwner, aOutpos, viewState, renderState, xLayoutedText->getFont() ) )
return uno::Reference< rendering::XCachedPrimitive >(NULL); // no output necessary
// TODO(F2): What about the offset scalings?
pTextLayout->draw( mpSurface, *mpVirtualDevice, aOutpos, viewState, renderState );
}
}
else
{
ENSURE_ARG_OR_THROW( false,
"CanvasHelper::drawTextLayout(): TextLayout not compatible with this canvas" );
}
return uno::Reference< rendering::XCachedPrimitive >(NULL);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
