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
|
/***************************************************************************
* Copyright (C) 2005 by Enrico Ros <[email protected]> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
***************************************************************************/
// qt / kde includes
#include <tqrect.h>
#include <tqpainter.h>
#include <tqpixmap.h>
#include <tqimage.h>
#include <tqapplication.h>
#include <kimageeffect.h>
// local includes
#include "pagepainter.h"
#include "core/page.h"
#include "conf/settings.h"
void PagePainter::paintPageOnPainter( const KPDFPage * page, int id, int flags,
TQPainter * destPainter, const TQRect & limits, int width, int height )
{
TQPixmap * pixmap = 0;
// if a pixmap is present for given id, use it
if ( page->m_pixmaps.contains( id ) )
pixmap = page->m_pixmaps[ id ];
// else find the closest match using pixmaps of other IDs (great optim!)
else if ( !page->m_pixmaps.isEmpty() && width != -1 )
{
int minDistance = -1;
TQMap< int,TQPixmap * >::const_iterator it = page->m_pixmaps.begin(), end = page->m_pixmaps.end();
for ( ; it != end; ++it )
{
int pixWidth = (*it)->width(),
distance = pixWidth > width ? pixWidth - width : width - pixWidth;
if ( minDistance == -1 || distance < minDistance )
{
pixmap = *it;
minDistance = distance;
}
}
}
// if have no pixmap, draw blank page with gray cross and exit
if ( !pixmap )
{
TQColor color = TQt::white;
if ( KpdfSettings::changeColors() )
{
switch ( KpdfSettings::renderMode() )
{
case KpdfSettings::EnumRenderMode::Inverted:
color = TQt::black;
break;
case KpdfSettings::EnumRenderMode::Paper:
color = KpdfSettings::paperColor();
break;
case KpdfSettings::EnumRenderMode::Recolor:
color = KpdfSettings::recolorBackground();
break;
default: ;
}
}
destPainter->fillRect( limits, color );
// draw a cross (to that the pixmap as not yet been loaded)
// helps a lot on pages that take much to render
destPainter->setPen( TQt::gray );
destPainter->drawLine( 0, 0, width-1, height-1 );
destPainter->drawLine( 0, height-1, width-1, 0 );
// idea here: draw a hourglass (or kpdf icon :-) on top-left corner
return;
}
// find out what to paint over the pixmap (manipulations / overlays)
bool paintAccessibility = (flags & Accessibility) && KpdfSettings::changeColors() && (KpdfSettings::renderMode() != KpdfSettings::EnumRenderMode::Paper);
bool paintHighlights = (flags & Highlights) && !page->m_highlights.isEmpty();
bool enhanceLinks = (flags & EnhanceLinks) && KpdfSettings::highlightLinks();
bool enhanceImages = (flags & EnhanceImages) && KpdfSettings::highlightImages();
// check if there are really some highlightRects to paint
if ( paintHighlights )
{
// precalc normalized 'limits rect' for intersection
double nXMin = (double)limits.left() / (double)width,
nXMax = (double)limits.right() / (double)width,
nYMin = (double)limits.top() / (double)height,
nYMax = (double)limits.bottom() / (double)height;
// if no rect intersects limits, disable paintHighlights
paintHighlights = false;
TQValueList< HighlightRect * >::const_iterator hIt = page->m_highlights.begin(), hEnd = page->m_highlights.end();
for ( ; hIt != hEnd; ++hIt )
{
if ( (*hIt)->intersects( nXMin, nYMin, nXMax, nYMax ) )
{
paintHighlights = true;
break;
}
}
}
// use backBuffer if 'pixmap direct manipulation' is needed
bool backBuffer = paintAccessibility || paintHighlights;
TQPixmap * backPixmap = 0;
TQPainter * p = destPainter;
if ( backBuffer )
{
// let's paint using a buffered painter
backPixmap = new TQPixmap( limits.width(), limits.height() );
p = new TQPainter( backPixmap );
p->translate( -limits.left(), -limits.top() );
}
// 1. fast blit the pixmap if it has the right size..
if ( pixmap->width() == width && pixmap->height() == height )
p->drawPixmap( limits.topLeft(), *pixmap, limits );
// ..else set a scale matrix to the painter and paint a quick 'zoomed' pixmap
else
{
p->save();
// TODO paint only the needed part (note: hope that TQt4 transforms are faster)
p->scale( width / (double)pixmap->width(), height / (double)pixmap->height() );
p->drawPixmap( 0,0, *pixmap, 0,0, pixmap->width(), pixmap->height() );
p->restore();
}
// 2. mangle pixmap: convert it to 32-bit qimage and perform pixel-level manipulations
if ( backBuffer )
{
TQImage backImage = backPixmap->convertToImage();
// 2.1. modify pixmap following accessibility settings
if ( paintAccessibility )
{
switch ( KpdfSettings::renderMode() )
{
case KpdfSettings::EnumRenderMode::Inverted:
// Invert image pixels using TQImage internal function
backImage.invertPixels(false);
break;
case KpdfSettings::EnumRenderMode::Recolor:
// Recolor image using KImageEffect::flatten with dither:0
KImageEffect::flatten( backImage, KpdfSettings::recolorForeground(), KpdfSettings::recolorBackground() );
break;
case KpdfSettings::EnumRenderMode::BlackWhite:
// Manual Gray and Contrast
unsigned int * data = (unsigned int *)backImage.bits();
int val, pixels = backImage.width() * backImage.height(),
con = KpdfSettings::bWContrast(), thr = 255 - KpdfSettings::bWThreshold();
for( int i = 0; i < pixels; ++i )
{
val = tqGray( data[i] );
if ( val > thr )
val = 128 + (127 * (val - thr)) / (255 - thr);
else if ( val < thr )
val = (128 * val) / thr;
if ( con > 2 )
{
val = con * ( val - thr ) / 2 + thr;
if ( val > 255 )
val = 255;
else if ( val < 0 )
val = 0;
}
data[i] = tqRgba( val, val, val, 255 );
}
break;
}
}
// 2.2. highlight rects in page
if ( paintHighlights )
{
// draw highlights that are inside the 'limits' paint region
TQValueList< HighlightRect * >::const_iterator hIt = page->m_highlights.begin(), hEnd = page->m_highlights.end();
for ( ; hIt != hEnd; ++hIt )
{
HighlightRect * r = *hIt;
TQRect highlightRect = r->geometry( width, height );
if ( highlightRect.isValid() && highlightRect.intersects( limits ) )
{
// find out the rect to highlight on pixmap
highlightRect = highlightRect.intersect( limits );
highlightRect.moveBy( -limits.left(), -limits.top() );
// highlight composition (product: highlight color * destcolor)
unsigned int * data = (unsigned int *)backImage.bits();
int val, newR, newG, newB,
rh = r->color.red(),
gh = r->color.green(),
bh = r->color.blue(),
offset = highlightRect.top() * backImage.width();
for( int y = highlightRect.top(); y <= highlightRect.bottom(); ++y )
{
for( int x = highlightRect.left(); x <= highlightRect.right(); ++x )
{
val = data[ x + offset ];
newR = (tqRed(val) * rh) / 255;
newG = (tqGreen(val) * gh) / 255;
newB = (tqBlue(val) * bh) / 255;
data[ x + offset ] = tqRgba( newR, newG, newB, 255 );
}
offset += backImage.width();
}
}
}
}
backPixmap->convertFromImage( backImage );
}
// 3. visually enchance links and images if requested
if ( enhanceLinks || enhanceImages )
{
TQColor normalColor = TQApplication::tqpalette().active().highlight();
TQColor lightColor = normalColor.light( 140 );
// enlarging limits for intersection is like growing the 'rectGeometry' below
TQRect limitsEnlarged = limits;
limitsEnlarged.addCoords( -2, -2, 2, 2 );
// draw rects that are inside the 'limits' paint region as opaque rects
TQValueList< ObjectRect * >::const_iterator lIt = page->m_rects.begin(), lEnd = page->m_rects.end();
for ( ; lIt != lEnd; ++lIt )
{
ObjectRect * rect = *lIt;
if ( (enhanceLinks && rect->objectType() == ObjectRect::Link) ||
(enhanceImages && rect->objectType() == ObjectRect::Image) )
{
TQRect rectGeometry = rect->geometry( width, height );
if ( rectGeometry.intersects( limitsEnlarged ) )
{
// expand rect and draw inner border
rectGeometry.addCoords( -1,-1,1,1 );
p->setPen( lightColor );
p->drawRect( rectGeometry );
// expand rect to draw outer border
rectGeometry.addCoords( -1,-1,1,1 );
p->setPen( normalColor );
p->drawRect( rectGeometry );
}
}
}
}
// 4. if was backbuffering, copy the backPixmap to destination
if ( backBuffer )
{
delete p;
destPainter->drawPixmap( limits.left(), limits.top(), *backPixmap );
delete backPixmap;
}
}
|
