|
0
|
1 |
/****************************************************************************
|
|
|
2 |
**
|
|
|
3 |
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
|
4 |
** All rights reserved.
|
|
|
5 |
** Contact: Nokia Corporation (qt-info@nokia.com)
|
|
|
6 |
**
|
|
|
7 |
** This file is part of the plugins of the Qt Toolkit.
|
|
|
8 |
**
|
|
|
9 |
** $QT_BEGIN_LICENSE:LGPL$
|
|
|
10 |
** No Commercial Usage
|
|
|
11 |
** This file contains pre-release code and may not be distributed.
|
|
|
12 |
** You may use this file in accordance with the terms and conditions
|
|
|
13 |
** contained in the Technology Preview License Agreement accompanying
|
|
|
14 |
** this package.
|
|
|
15 |
**
|
|
|
16 |
** GNU Lesser General Public License Usage
|
|
|
17 |
** Alternatively, this file may be used under the terms of the GNU Lesser
|
|
|
18 |
** General Public License version 2.1 as published by the Free Software
|
|
|
19 |
** Foundation and appearing in the file LICENSE.LGPL included in the
|
|
|
20 |
** packaging of this file. Please review the following information to
|
|
|
21 |
** ensure the GNU Lesser General Public License version 2.1 requirements
|
|
|
22 |
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|
|
23 |
**
|
|
|
24 |
** In addition, as a special exception, Nokia gives you certain additional
|
|
|
25 |
** rights. These rights are described in the Nokia Qt LGPL Exception
|
|
|
26 |
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
|
|
27 |
**
|
|
|
28 |
** If you have questions regarding the use of this file, please contact
|
|
|
29 |
** Nokia at qt-info@nokia.com.
|
|
|
30 |
**
|
|
|
31 |
**
|
|
|
32 |
**
|
|
|
33 |
**
|
|
|
34 |
**
|
|
|
35 |
**
|
|
|
36 |
**
|
|
|
37 |
**
|
|
|
38 |
** $QT_END_LICENSE$
|
|
|
39 |
**
|
|
|
40 |
****************************************************************************/
|
|
|
41 |
|
|
|
42 |
#include "qjpeghandler.h"
|
|
|
43 |
|
|
|
44 |
#include <qimage.h>
|
|
|
45 |
#include <qvariant.h>
|
|
|
46 |
#include <qvector.h>
|
|
|
47 |
|
|
|
48 |
#include <stdio.h> // jpeglib needs this to be pre-included
|
|
|
49 |
#include <setjmp.h>
|
|
|
50 |
|
|
|
51 |
#ifdef FAR
|
|
|
52 |
#undef FAR
|
|
|
53 |
#endif
|
|
|
54 |
|
|
|
55 |
// hw: optimize smoothscaler for returning 24-bit images
|
|
|
56 |
|
|
|
57 |
// including jpeglib.h seems to be a little messy
|
|
|
58 |
extern "C" {
|
|
|
59 |
// mingw includes rpcndr.h but does not define boolean
|
|
|
60 |
#if defined(Q_OS_WIN) && defined(Q_CC_GNU)
|
|
|
61 |
# if defined(__RPCNDR_H__) && !defined(boolean)
|
|
|
62 |
typedef unsigned char boolean;
|
|
|
63 |
# define HAVE_BOOLEAN
|
|
|
64 |
# endif
|
|
|
65 |
#endif
|
|
|
66 |
|
|
|
67 |
#define XMD_H // shut JPEGlib up
|
|
|
68 |
#if defined(Q_OS_UNIXWARE)
|
|
|
69 |
# define HAVE_BOOLEAN // libjpeg under Unixware seems to need this
|
|
|
70 |
#endif
|
|
|
71 |
#include <jpeglib.h>
|
|
|
72 |
#ifdef const
|
|
|
73 |
# undef const // remove crazy C hackery in jconfig.h
|
|
|
74 |
#endif
|
|
|
75 |
}
|
|
|
76 |
|
|
|
77 |
QT_BEGIN_NAMESPACE
|
|
|
78 |
|
|
|
79 |
//#define QT_NO_IMAGE_SMOOTHSCALE
|
|
|
80 |
#ifndef QT_NO_IMAGE_SMOOTHSCALE
|
|
|
81 |
class QImageSmoothScalerPrivate;
|
|
|
82 |
class QImageSmoothScaler
|
|
|
83 |
{
|
|
|
84 |
public:
|
|
|
85 |
QImageSmoothScaler(const int w, const int h, const QImage &src);
|
|
|
86 |
QImageSmoothScaler(const int srcWidth, const int srcHeight,
|
|
|
87 |
const char *parameters);
|
|
|
88 |
|
|
|
89 |
virtual ~QImageSmoothScaler(void);
|
|
|
90 |
|
|
|
91 |
QImage scale();
|
|
|
92 |
|
|
|
93 |
protected:
|
|
|
94 |
int scaledWidth(void) const;
|
|
|
95 |
|
|
|
96 |
private:
|
|
|
97 |
QImageSmoothScalerPrivate *d;
|
|
|
98 |
virtual QRgb *scanLine(const int line = 0, const QImage *src = 0);
|
|
|
99 |
};
|
|
|
100 |
|
|
|
101 |
class QImageSmoothScalerPrivate
|
|
|
102 |
{
|
|
|
103 |
public:
|
|
|
104 |
int cols;
|
|
|
105 |
int newcols;
|
|
|
106 |
int rows;
|
|
|
107 |
int newrows;
|
|
|
108 |
bool hasAlpha;
|
|
|
109 |
|
|
|
110 |
const QImage *src;
|
|
|
111 |
|
|
|
112 |
void setup(const int srcWidth, const int srcHeight, const int dstWidth,
|
|
|
113 |
const int dstHeight, bool hasAlphaChannel);
|
|
|
114 |
};
|
|
|
115 |
|
|
|
116 |
QImageSmoothScaler::QImageSmoothScaler(const int w, const int h,
|
|
|
117 |
const QImage &src)
|
|
|
118 |
{
|
|
|
119 |
d = new QImageSmoothScalerPrivate;
|
|
|
120 |
|
|
|
121 |
d->setup(src.width(), src.height(), w, h, src.hasAlphaChannel() );
|
|
|
122 |
this->d->src = &src;
|
|
|
123 |
}
|
|
|
124 |
|
|
|
125 |
QImageSmoothScaler::QImageSmoothScaler(const int srcWidth, const int srcHeight,
|
|
|
126 |
const char *parameters)
|
|
|
127 |
{
|
|
|
128 |
char sModeStr[1024];
|
|
|
129 |
int t1;
|
|
|
130 |
int t2;
|
|
|
131 |
int dstWidth;
|
|
|
132 |
int dstHeight;
|
|
|
133 |
|
|
|
134 |
sModeStr[0] = '\0';
|
|
|
135 |
|
|
|
136 |
d = new QImageSmoothScalerPrivate;
|
|
|
137 |
#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE) && defined(_MSC_VER) && _MSC_VER >= 1400
|
|
|
138 |
sscanf_s(parameters, "Scale( %i, %i, %1023s )", &dstWidth, &dstHeight, sModeStr, sizeof(sModeStr));
|
|
|
139 |
#else
|
|
|
140 |
sscanf(parameters, "Scale( %i, %i, %s )", &dstWidth, &dstHeight, sModeStr);
|
|
|
141 |
#endif
|
|
|
142 |
QString sModeQStr = QString::fromLatin1(sModeStr);
|
|
|
143 |
|
|
|
144 |
t1 = srcWidth * dstHeight;
|
|
|
145 |
t2 = srcHeight * dstWidth;
|
|
|
146 |
|
|
|
147 |
if (((sModeQStr == QLatin1String("ScaleMin")) && (t1 > t2)) || ((sModeQStr == QLatin1String("ScaleMax")) && (t2 < t2))) {
|
|
|
148 |
dstHeight = t2 / srcWidth;
|
|
|
149 |
} else if (sModeQStr != QLatin1String("ScaleFree")) {
|
|
|
150 |
dstWidth = t1 / srcHeight;
|
|
|
151 |
}
|
|
|
152 |
|
|
|
153 |
d->setup(srcWidth, srcHeight, dstWidth, dstHeight, 0);
|
|
|
154 |
}
|
|
|
155 |
|
|
|
156 |
void QImageSmoothScalerPrivate::setup(const int srcWidth, const int srcHeight,
|
|
|
157 |
const int dstWidth, const int dstHeight,
|
|
|
158 |
bool hasAlphaChannel)
|
|
|
159 |
{
|
|
|
160 |
cols = srcWidth;
|
|
|
161 |
rows = srcHeight;
|
|
|
162 |
newcols = dstWidth;
|
|
|
163 |
newrows = dstHeight;
|
|
|
164 |
hasAlpha = hasAlphaChannel;
|
|
|
165 |
}
|
|
|
166 |
|
|
|
167 |
int QImageSmoothScaler::scaledWidth() const
|
|
|
168 |
{
|
|
|
169 |
return d->cols;
|
|
|
170 |
}
|
|
|
171 |
|
|
|
172 |
QImageSmoothScaler::~QImageSmoothScaler()
|
|
|
173 |
{
|
|
|
174 |
delete d;
|
|
|
175 |
}
|
|
|
176 |
|
|
|
177 |
inline QRgb *QImageSmoothScaler::scanLine(const int line, const QImage *src)
|
|
|
178 |
{
|
|
|
179 |
return (QRgb*)src->scanLine(line);
|
|
|
180 |
}
|
|
|
181 |
|
|
|
182 |
/*
|
|
|
183 |
This function uses code based on pnmscale.c by Jef Poskanzer.
|
|
|
184 |
|
|
|
185 |
pnmscale.c - read a portable anymap and scale it
|
|
|
186 |
|
|
|
187 |
Copyright (C) 1989, 1991 by Jef Poskanzer.
|
|
|
188 |
|
|
|
189 |
Permission to use, copy, modify, and distribute this software and its
|
|
|
190 |
documentation for any purpose and without fee is hereby granted, provided
|
|
|
191 |
that the above copyright notice appear in all copies and that both that
|
|
|
192 |
copyright notice and this permission notice appear in supporting
|
|
|
193 |
documentation. This software is provided "as is" without express or
|
|
|
194 |
implied warranty.
|
|
|
195 |
*/
|
|
|
196 |
|
|
|
197 |
QImage QImageSmoothScaler::scale()
|
|
|
198 |
{
|
|
|
199 |
long SCALE;
|
|
|
200 |
long HALFSCALE;
|
|
|
201 |
QRgb *xelrow = 0;
|
|
|
202 |
QRgb *tempxelrow = 0;
|
|
|
203 |
QRgb *xP;
|
|
|
204 |
QRgb *nxP;
|
|
|
205 |
int row, rowsread;
|
|
|
206 |
int col, needtoreadrow;
|
|
|
207 |
uchar maxval = 255;
|
|
|
208 |
qreal xscale, yscale;
|
|
|
209 |
long sxscale, syscale;
|
|
|
210 |
long fracrowtofill, fracrowleft;
|
|
|
211 |
long *as;
|
|
|
212 |
long *rs;
|
|
|
213 |
long *gs;
|
|
|
214 |
long *bs;
|
|
|
215 |
int rowswritten = 0;
|
|
|
216 |
QImage dst;
|
|
|
217 |
|
|
|
218 |
if (d->cols > 4096) {
|
|
|
219 |
SCALE = 4096;
|
|
|
220 |
HALFSCALE = 2048;
|
|
|
221 |
} else {
|
|
|
222 |
int fac = 4096;
|
|
|
223 |
while (d->cols * fac > 4096) {
|
|
|
224 |
fac /= 2;
|
|
|
225 |
}
|
|
|
226 |
|
|
|
227 |
SCALE = fac * d->cols;
|
|
|
228 |
HALFSCALE = fac * d->cols / 2;
|
|
|
229 |
}
|
|
|
230 |
|
|
|
231 |
xscale = (qreal) d->newcols / (qreal) d->cols;
|
|
|
232 |
yscale = (qreal) d->newrows / (qreal) d->rows;
|
|
|
233 |
sxscale = (long)(xscale * SCALE);
|
|
|
234 |
syscale = (long)(yscale * SCALE);
|
|
|
235 |
|
|
|
236 |
if ( d->newrows != d->rows ) /* shortcut Y scaling if possible */
|
|
|
237 |
tempxelrow = new QRgb[d->cols];
|
|
|
238 |
|
|
|
239 |
if ( d->hasAlpha ) {
|
|
|
240 |
as = new long[d->cols];
|
|
|
241 |
for ( col = 0; col < d->cols; ++col )
|
|
|
242 |
as[col] = HALFSCALE;
|
|
|
243 |
} else {
|
|
|
244 |
as = 0;
|
|
|
245 |
}
|
|
|
246 |
rs = new long[d->cols];
|
|
|
247 |
gs = new long[d->cols];
|
|
|
248 |
bs = new long[d->cols];
|
|
|
249 |
rowsread = 0;
|
|
|
250 |
fracrowleft = syscale;
|
|
|
251 |
needtoreadrow = 1;
|
|
|
252 |
for ( col = 0; col < d->cols; ++col )
|
|
|
253 |
rs[col] = gs[col] = bs[col] = HALFSCALE;
|
|
|
254 |
fracrowtofill = SCALE;
|
|
|
255 |
|
|
|
256 |
dst = QImage( d->newcols, d->newrows, d->hasAlpha ? QImage::Format_ARGB32 : QImage::Format_RGB32 );
|
|
|
257 |
|
|
|
258 |
for ( row = 0; row < d->newrows; ++row ) {
|
|
|
259 |
/* First scale Y from xelrow into tempxelrow. */
|
|
|
260 |
if ( d->newrows == d->rows ) {
|
|
|
261 |
/* shortcut Y scaling if possible */
|
|
|
262 |
tempxelrow = xelrow = scanLine(rowsread++, d->src);
|
|
|
263 |
} else {
|
|
|
264 |
while ( fracrowleft < fracrowtofill ) {
|
|
|
265 |
if ( needtoreadrow && rowsread < d->rows ) {
|
|
|
266 |
xelrow = scanLine(rowsread++, d->src);
|
|
|
267 |
}
|
|
|
268 |
for ( col = 0, xP = xelrow; col < d->cols; ++col, ++xP ) {
|
|
|
269 |
if (as) {
|
|
|
270 |
as[col] += fracrowleft * qAlpha( *xP );
|
|
|
271 |
rs[col] += fracrowleft * qRed( *xP ) * qAlpha( *xP ) / 255;
|
|
|
272 |
gs[col] += fracrowleft * qGreen( *xP ) * qAlpha( *xP ) / 255;
|
|
|
273 |
bs[col] += fracrowleft * qBlue( *xP ) * qAlpha( *xP ) / 255;
|
|
|
274 |
} else {
|
|
|
275 |
rs[col] += fracrowleft * qRed( *xP );
|
|
|
276 |
gs[col] += fracrowleft * qGreen( *xP );
|
|
|
277 |
bs[col] += fracrowleft * qBlue( *xP );
|
|
|
278 |
}
|
|
|
279 |
}
|
|
|
280 |
fracrowtofill -= fracrowleft;
|
|
|
281 |
fracrowleft = syscale;
|
|
|
282 |
needtoreadrow = 1;
|
|
|
283 |
}
|
|
|
284 |
/* Now fracrowleft is >= fracrowtofill, so we can produce a row. */
|
|
|
285 |
if ( needtoreadrow && rowsread < d->rows) {
|
|
|
286 |
xelrow = scanLine(rowsread++, d->src);
|
|
|
287 |
needtoreadrow = 0;
|
|
|
288 |
}
|
|
|
289 |
for ( col = 0, xP = xelrow, nxP = tempxelrow;
|
|
|
290 |
col < d->cols; ++col, ++xP, ++nxP )
|
|
|
291 |
{
|
|
|
292 |
register long a, r, g, b;
|
|
|
293 |
|
|
|
294 |
if ( as ) {
|
|
|
295 |
r = rs[col] + fracrowtofill * qRed( *xP ) * qAlpha( *xP ) / 255;
|
|
|
296 |
g = gs[col] + fracrowtofill * qGreen( *xP ) * qAlpha( *xP ) / 255;
|
|
|
297 |
b = bs[col] + fracrowtofill * qBlue( *xP ) * qAlpha( *xP ) / 255;
|
|
|
298 |
a = as[col] + fracrowtofill * qAlpha( *xP );
|
|
|
299 |
if ( a ) {
|
|
|
300 |
r = r * 255 / a * SCALE;
|
|
|
301 |
g = g * 255 / a * SCALE;
|
|
|
302 |
b = b * 255 / a * SCALE;
|
|
|
303 |
}
|
|
|
304 |
} else {
|
|
|
305 |
r = rs[col] + fracrowtofill * qRed( *xP );
|
|
|
306 |
g = gs[col] + fracrowtofill * qGreen( *xP );
|
|
|
307 |
b = bs[col] + fracrowtofill * qBlue( *xP );
|
|
|
308 |
a = 0; // unwarn
|
|
|
309 |
}
|
|
|
310 |
r /= SCALE;
|
|
|
311 |
if ( r > maxval ) r = maxval;
|
|
|
312 |
g /= SCALE;
|
|
|
313 |
if ( g > maxval ) g = maxval;
|
|
|
314 |
b /= SCALE;
|
|
|
315 |
if ( b > maxval ) b = maxval;
|
|
|
316 |
if ( as ) {
|
|
|
317 |
a /= SCALE;
|
|
|
318 |
if ( a > maxval ) a = maxval;
|
|
|
319 |
*nxP = qRgba( (int)r, (int)g, (int)b, (int)a );
|
|
|
320 |
as[col] = HALFSCALE;
|
|
|
321 |
} else {
|
|
|
322 |
*nxP = qRgb( (int)r, (int)g, (int)b );
|
|
|
323 |
}
|
|
|
324 |
rs[col] = gs[col] = bs[col] = HALFSCALE;
|
|
|
325 |
}
|
|
|
326 |
fracrowleft -= fracrowtofill;
|
|
|
327 |
if ( fracrowleft == 0 ) {
|
|
|
328 |
fracrowleft = syscale;
|
|
|
329 |
needtoreadrow = 1;
|
|
|
330 |
}
|
|
|
331 |
fracrowtofill = SCALE;
|
|
|
332 |
}
|
|
|
333 |
|
|
|
334 |
/* Now scale X from tempxelrow into dst and write it out. */
|
|
|
335 |
if ( d->newcols == d->cols ) {
|
|
|
336 |
/* shortcut X scaling if possible */
|
|
|
337 |
memcpy(dst.scanLine(rowswritten++), tempxelrow, d->newcols*4);
|
|
|
338 |
} else {
|
|
|
339 |
register long a, r, g, b;
|
|
|
340 |
register long fraccoltofill, fraccolleft = 0;
|
|
|
341 |
register int needcol;
|
|
|
342 |
|
|
|
343 |
nxP = (QRgb*)dst.scanLine(rowswritten++);
|
|
|
344 |
fraccoltofill = SCALE;
|
|
|
345 |
a = r = g = b = HALFSCALE;
|
|
|
346 |
needcol = 0;
|
|
|
347 |
for ( col = 0, xP = tempxelrow; col < d->cols; ++col, ++xP ) {
|
|
|
348 |
fraccolleft = sxscale;
|
|
|
349 |
while ( fraccolleft >= fraccoltofill ) {
|
|
|
350 |
if ( needcol ) {
|
|
|
351 |
++nxP;
|
|
|
352 |
a = r = g = b = HALFSCALE;
|
|
|
353 |
}
|
|
|
354 |
if ( as ) {
|
|
|
355 |
r += fraccoltofill * qRed( *xP ) * qAlpha( *xP ) / 255;
|
|
|
356 |
g += fraccoltofill * qGreen( *xP ) * qAlpha( *xP ) / 255;
|
|
|
357 |
b += fraccoltofill * qBlue( *xP ) * qAlpha( *xP ) / 255;
|
|
|
358 |
a += fraccoltofill * qAlpha( *xP );
|
|
|
359 |
if ( a ) {
|
|
|
360 |
r = r * 255 / a * SCALE;
|
|
|
361 |
g = g * 255 / a * SCALE;
|
|
|
362 |
b = b * 255 / a * SCALE;
|
|
|
363 |
}
|
|
|
364 |
} else {
|
|
|
365 |
r += fraccoltofill * qRed( *xP );
|
|
|
366 |
g += fraccoltofill * qGreen( *xP );
|
|
|
367 |
b += fraccoltofill * qBlue( *xP );
|
|
|
368 |
}
|
|
|
369 |
r /= SCALE;
|
|
|
370 |
if ( r > maxval ) r = maxval;
|
|
|
371 |
g /= SCALE;
|
|
|
372 |
if ( g > maxval ) g = maxval;
|
|
|
373 |
b /= SCALE;
|
|
|
374 |
if ( b > maxval ) b = maxval;
|
|
|
375 |
if (as) {
|
|
|
376 |
a /= SCALE;
|
|
|
377 |
if ( a > maxval ) a = maxval;
|
|
|
378 |
*nxP = qRgba( (int)r, (int)g, (int)b, (int)a );
|
|
|
379 |
} else {
|
|
|
380 |
*nxP = qRgb( (int)r, (int)g, (int)b );
|
|
|
381 |
}
|
|
|
382 |
fraccolleft -= fraccoltofill;
|
|
|
383 |
fraccoltofill = SCALE;
|
|
|
384 |
needcol = 1;
|
|
|
385 |
}
|
|
|
386 |
if ( fraccolleft > 0 ) {
|
|
|
387 |
if ( needcol ) {
|
|
|
388 |
++nxP;
|
|
|
389 |
a = r = g = b = HALFSCALE;
|
|
|
390 |
needcol = 0;
|
|
|
391 |
}
|
|
|
392 |
if (as) {
|
|
|
393 |
a += fraccolleft * qAlpha( *xP );
|
|
|
394 |
r += fraccolleft * qRed( *xP ) * qAlpha( *xP ) / 255;
|
|
|
395 |
g += fraccolleft * qGreen( *xP ) * qAlpha( *xP ) / 255;
|
|
|
396 |
b += fraccolleft * qBlue( *xP ) * qAlpha( *xP ) / 255;
|
|
|
397 |
} else {
|
|
|
398 |
r += fraccolleft * qRed( *xP );
|
|
|
399 |
g += fraccolleft * qGreen( *xP );
|
|
|
400 |
b += fraccolleft * qBlue( *xP );
|
|
|
401 |
}
|
|
|
402 |
fraccoltofill -= fraccolleft;
|
|
|
403 |
}
|
|
|
404 |
}
|
|
|
405 |
if ( fraccoltofill > 0 ) {
|
|
|
406 |
--xP;
|
|
|
407 |
if (as) {
|
|
|
408 |
a += fraccolleft * qAlpha( *xP );
|
|
|
409 |
r += fraccoltofill * qRed( *xP ) * qAlpha( *xP ) / 255;
|
|
|
410 |
g += fraccoltofill * qGreen( *xP ) * qAlpha( *xP ) / 255;
|
|
|
411 |
b += fraccoltofill * qBlue( *xP ) * qAlpha( *xP ) / 255;
|
|
|
412 |
if ( a ) {
|
|
|
413 |
r = r * 255 / a * SCALE;
|
|
|
414 |
g = g * 255 / a * SCALE;
|
|
|
415 |
b = b * 255 / a * SCALE;
|
|
|
416 |
}
|
|
|
417 |
} else {
|
|
|
418 |
r += fraccoltofill * qRed( *xP );
|
|
|
419 |
g += fraccoltofill * qGreen( *xP );
|
|
|
420 |
b += fraccoltofill * qBlue( *xP );
|
|
|
421 |
}
|
|
|
422 |
}
|
|
|
423 |
if ( ! needcol ) {
|
|
|
424 |
r /= SCALE;
|
|
|
425 |
if ( r > maxval ) r = maxval;
|
|
|
426 |
g /= SCALE;
|
|
|
427 |
if ( g > maxval ) g = maxval;
|
|
|
428 |
b /= SCALE;
|
|
|
429 |
if ( b > maxval ) b = maxval;
|
|
|
430 |
if (as) {
|
|
|
431 |
a /= SCALE;
|
|
|
432 |
if ( a > maxval ) a = maxval;
|
|
|
433 |
*nxP = qRgba( (int)r, (int)g, (int)b, (int)a );
|
|
|
434 |
} else {
|
|
|
435 |
*nxP = qRgb( (int)r, (int)g, (int)b );
|
|
|
436 |
}
|
|
|
437 |
}
|
|
|
438 |
}
|
|
|
439 |
}
|
|
|
440 |
|
|
|
441 |
if ( d->newrows != d->rows && tempxelrow )// Robust, tempxelrow might be 0 1 day
|
|
|
442 |
delete [] tempxelrow;
|
|
|
443 |
if ( as ) // Avoid purify complaint
|
|
|
444 |
delete [] as;
|
|
|
445 |
if ( rs ) // Robust, rs might be 0 one day
|
|
|
446 |
delete [] rs;
|
|
|
447 |
if ( gs ) // Robust, gs might be 0 one day
|
|
|
448 |
delete [] gs;
|
|
|
449 |
if ( bs ) // Robust, bs might be 0 one day
|
|
|
450 |
delete [] bs;
|
|
|
451 |
|
|
|
452 |
return dst;
|
|
|
453 |
}
|
|
|
454 |
|
|
|
455 |
class jpegSmoothScaler : public QImageSmoothScaler
|
|
|
456 |
{
|
|
|
457 |
public:
|
|
|
458 |
jpegSmoothScaler(struct jpeg_decompress_struct *info, const char *params):
|
|
|
459 |
QImageSmoothScaler(info->output_width, info->output_height, params)
|
|
|
460 |
{
|
|
|
461 |
cinfo = info;
|
|
|
462 |
cols24Bit = scaledWidth() * 3;
|
|
|
463 |
|
|
|
464 |
cacheHeight = 1;
|
|
|
465 |
imageCache = QImage( info->output_width, cacheHeight, QImage::Format_RGB32 );
|
|
|
466 |
}
|
|
|
467 |
|
|
|
468 |
private:
|
|
|
469 |
int cols24Bit;
|
|
|
470 |
QImage imageCache;
|
|
|
471 |
int cacheHeight;
|
|
|
472 |
struct jpeg_decompress_struct *cinfo;
|
|
|
473 |
|
|
|
474 |
QRgb *scanLine(const int line = 0, const QImage *src = 0)
|
|
|
475 |
{
|
|
|
476 |
QRgb *out;
|
|
|
477 |
uchar *in;
|
|
|
478 |
|
|
|
479 |
Q_UNUSED(line);
|
|
|
480 |
Q_UNUSED(src);
|
|
|
481 |
|
|
|
482 |
uchar* data = imageCache.bits();
|
|
|
483 |
jpeg_read_scanlines(cinfo, &data, 1);
|
|
|
484 |
out = (QRgb*)imageCache.scanLine(0);
|
|
|
485 |
|
|
|
486 |
//
|
|
|
487 |
// The smooth scale algorithm only works on 32-bit images;
|
|
|
488 |
// convert from (8|24) bits to 32.
|
|
|
489 |
//
|
|
|
490 |
if (cinfo->output_components == 1) {
|
|
|
491 |
in = (uchar*)out + scaledWidth();
|
|
|
492 |
for (uint i = scaledWidth(); i--; ) {
|
|
|
493 |
in--;
|
|
|
494 |
out[i] = qRgb(*in, *in, *in);
|
|
|
495 |
}
|
|
|
496 |
} else if (cinfo->out_color_space == JCS_CMYK) {
|
|
|
497 |
int cols32Bit = scaledWidth() * 4;
|
|
|
498 |
in = (uchar*)out + cols32Bit;
|
|
|
499 |
for (uint i = scaledWidth(); i--; ) {
|
|
|
500 |
in -= 4;
|
|
|
501 |
int k = in[3];
|
|
|
502 |
out[i] = qRgb(k * in[0] / 255, k * in[1] / 255, k * in[2] / 255);
|
|
|
503 |
//out[i] = qRgb(in[0], in[1], in[2]);
|
|
|
504 |
}
|
|
|
505 |
} else {
|
|
|
506 |
in = (uchar*)out + cols24Bit;
|
|
|
507 |
for (uint i = scaledWidth(); i--; ) {
|
|
|
508 |
in -= 3;
|
|
|
509 |
out[i] = qRgb(in[0], in[1], in[2]);
|
|
|
510 |
}
|
|
|
511 |
}
|
|
|
512 |
|
|
|
513 |
return out;
|
|
|
514 |
}
|
|
|
515 |
|
|
|
516 |
};
|
|
|
517 |
#endif
|
|
|
518 |
|
|
|
519 |
struct my_error_mgr : public jpeg_error_mgr {
|
|
|
520 |
jmp_buf setjmp_buffer;
|
|
|
521 |
};
|
|
|
522 |
|
|
|
523 |
#if defined(Q_C_CALLBACKS)
|
|
|
524 |
extern "C" {
|
|
|
525 |
#endif
|
|
|
526 |
|
|
|
527 |
static void my_error_exit (j_common_ptr cinfo)
|
|
|
528 |
{
|
|
|
529 |
my_error_mgr* myerr = (my_error_mgr*) cinfo->err;
|
|
|
530 |
char buffer[JMSG_LENGTH_MAX];
|
|
|
531 |
(*cinfo->err->format_message)(cinfo, buffer);
|
|
|
532 |
qWarning("%s", buffer);
|
|
|
533 |
longjmp(myerr->setjmp_buffer, 1);
|
|
|
534 |
}
|
|
|
535 |
|
|
|
536 |
#if defined(Q_C_CALLBACKS)
|
|
|
537 |
}
|
|
|
538 |
#endif
|
|
|
539 |
|
|
|
540 |
|
|
|
541 |
static const int max_buf = 4096;
|
|
|
542 |
|
|
|
543 |
struct my_jpeg_source_mgr : public jpeg_source_mgr {
|
|
|
544 |
// Nothing dynamic - cannot rely on destruction over longjump
|
|
|
545 |
QIODevice *device;
|
|
|
546 |
JOCTET buffer[max_buf];
|
|
|
547 |
|
|
|
548 |
public:
|
|
|
549 |
my_jpeg_source_mgr(QIODevice *device);
|
|
|
550 |
};
|
|
|
551 |
|
|
|
552 |
#if defined(Q_C_CALLBACKS)
|
|
|
553 |
extern "C" {
|
|
|
554 |
#endif
|
|
|
555 |
|
|
|
556 |
static void qt_init_source(j_decompress_ptr)
|
|
|
557 |
{
|
|
|
558 |
}
|
|
|
559 |
|
|
|
560 |
static boolean qt_fill_input_buffer(j_decompress_ptr cinfo)
|
|
|
561 |
{
|
|
|
562 |
int num_read;
|
|
|
563 |
my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src;
|
|
|
564 |
src->next_input_byte = src->buffer;
|
|
|
565 |
num_read = src->device->read((char*)src->buffer, max_buf);
|
|
|
566 |
if (num_read <= 0) {
|
|
|
567 |
// Insert a fake EOI marker - as per jpeglib recommendation
|
|
|
568 |
src->buffer[0] = (JOCTET) 0xFF;
|
|
|
569 |
src->buffer[1] = (JOCTET) JPEG_EOI;
|
|
|
570 |
src->bytes_in_buffer = 2;
|
|
|
571 |
} else {
|
|
|
572 |
src->bytes_in_buffer = num_read;
|
|
|
573 |
}
|
|
|
574 |
#if defined(Q_OS_UNIXWARE)
|
|
|
575 |
return B_TRUE;
|
|
|
576 |
#else
|
|
|
577 |
return true;
|
|
|
578 |
#endif
|
|
|
579 |
}
|
|
|
580 |
|
|
|
581 |
static void qt_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
|
|
|
582 |
{
|
|
|
583 |
my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src;
|
|
|
584 |
|
|
|
585 |
// `dumb' implementation from jpeglib
|
|
|
586 |
|
|
|
587 |
/* Just a dumb implementation for now. Could use fseek() except
|
|
|
588 |
* it doesn't work on pipes. Not clear that being smart is worth
|
|
|
589 |
* any trouble anyway --- large skips are infrequent.
|
|
|
590 |
*/
|
|
|
591 |
if (num_bytes > 0) {
|
|
|
592 |
while (num_bytes > (long) src->bytes_in_buffer) {
|
|
|
593 |
num_bytes -= (long) src->bytes_in_buffer;
|
|
|
594 |
(void) qt_fill_input_buffer(cinfo);
|
|
|
595 |
/* note we assume that qt_fill_input_buffer will never return false,
|
|
|
596 |
* so suspension need not be handled.
|
|
|
597 |
*/
|
|
|
598 |
}
|
|
|
599 |
src->next_input_byte += (size_t) num_bytes;
|
|
|
600 |
src->bytes_in_buffer -= (size_t) num_bytes;
|
|
|
601 |
}
|
|
|
602 |
}
|
|
|
603 |
|
|
|
604 |
static void qt_term_source(j_decompress_ptr cinfo)
|
|
|
605 |
{
|
|
|
606 |
my_jpeg_source_mgr* src = (my_jpeg_source_mgr*)cinfo->src;
|
|
|
607 |
if (!src->device->isSequential())
|
|
|
608 |
src->device->seek(src->device->pos() - src->bytes_in_buffer);
|
|
|
609 |
}
|
|
|
610 |
|
|
|
611 |
#if defined(Q_C_CALLBACKS)
|
|
|
612 |
}
|
|
|
613 |
#endif
|
|
|
614 |
|
|
|
615 |
inline my_jpeg_source_mgr::my_jpeg_source_mgr(QIODevice *device)
|
|
|
616 |
{
|
|
|
617 |
jpeg_source_mgr::init_source = qt_init_source;
|
|
|
618 |
jpeg_source_mgr::fill_input_buffer = qt_fill_input_buffer;
|
|
|
619 |
jpeg_source_mgr::skip_input_data = qt_skip_input_data;
|
|
|
620 |
jpeg_source_mgr::resync_to_restart = jpeg_resync_to_restart;
|
|
|
621 |
jpeg_source_mgr::term_source = qt_term_source;
|
|
|
622 |
this->device = device;
|
|
|
623 |
bytes_in_buffer = 0;
|
|
|
624 |
next_input_byte = buffer;
|
|
|
625 |
}
|
|
|
626 |
|
|
|
627 |
|
|
|
628 |
static void scaleSize(int &reqW, int &reqH, int imgW, int imgH, Qt::AspectRatioMode mode)
|
|
|
629 |
{
|
|
|
630 |
if (mode == Qt::IgnoreAspectRatio)
|
|
|
631 |
return;
|
|
|
632 |
int t1 = imgW * reqH;
|
|
|
633 |
int t2 = reqW * imgH;
|
|
|
634 |
if ((mode == Qt::KeepAspectRatio && (t1 > t2)) || (mode == Qt::KeepAspectRatioByExpanding && (t1 < t2)))
|
|
|
635 |
reqH = t2 / imgW;
|
|
|
636 |
else
|
|
|
637 |
reqW = t1 / imgH;
|
|
|
638 |
}
|
|
|
639 |
|
|
|
640 |
static bool read_jpeg_size(QIODevice *device, int &w, int &h)
|
|
|
641 |
{
|
|
|
642 |
bool rt = false;
|
|
|
643 |
struct jpeg_decompress_struct cinfo;
|
|
|
644 |
|
|
|
645 |
struct my_jpeg_source_mgr *iod_src = new my_jpeg_source_mgr(device);
|
|
|
646 |
struct my_error_mgr jerr;
|
|
|
647 |
|
|
|
648 |
jpeg_create_decompress(&cinfo);
|
|
|
649 |
|
|
|
650 |
cinfo.src = iod_src;
|
|
|
651 |
|
|
|
652 |
cinfo.err = jpeg_std_error(&jerr);
|
|
|
653 |
jerr.error_exit = my_error_exit;
|
|
|
654 |
|
|
|
655 |
if (!setjmp(jerr.setjmp_buffer)) {
|
|
|
656 |
#if defined(Q_OS_UNIXWARE)
|
|
|
657 |
(void) jpeg_read_header(&cinfo, B_TRUE);
|
|
|
658 |
#else
|
|
|
659 |
(void) jpeg_read_header(&cinfo, true);
|
|
|
660 |
#endif
|
|
|
661 |
(void) jpeg_calc_output_dimensions(&cinfo);
|
|
|
662 |
|
|
|
663 |
w = cinfo.output_width;
|
|
|
664 |
h = cinfo.output_height;
|
|
|
665 |
rt = true;
|
|
|
666 |
}
|
|
|
667 |
jpeg_destroy_decompress(&cinfo);
|
|
|
668 |
delete iod_src;
|
|
|
669 |
return rt;
|
|
|
670 |
}
|
|
|
671 |
|
|
|
672 |
#define HIGH_QUALITY_THRESHOLD 50
|
|
|
673 |
|
|
|
674 |
static bool read_jpeg_format(QIODevice *device, QImage::Format &format)
|
|
|
675 |
{
|
|
|
676 |
bool result = false;
|
|
|
677 |
struct jpeg_decompress_struct cinfo;
|
|
|
678 |
|
|
|
679 |
struct my_jpeg_source_mgr *iod_src = new my_jpeg_source_mgr(device);
|
|
|
680 |
struct my_error_mgr jerr;
|
|
|
681 |
|
|
|
682 |
jpeg_create_decompress(&cinfo);
|
|
|
683 |
|
|
|
684 |
cinfo.src = iod_src;
|
|
|
685 |
|
|
|
686 |
cinfo.err = jpeg_std_error(&jerr);
|
|
|
687 |
jerr.error_exit = my_error_exit;
|
|
|
688 |
|
|
|
689 |
if (!setjmp(jerr.setjmp_buffer)) {
|
|
|
690 |
#if defined(Q_OS_UNIXWARE)
|
|
|
691 |
(void) jpeg_read_header(&cinfo, B_TRUE);
|
|
|
692 |
#else
|
|
|
693 |
(void) jpeg_read_header(&cinfo, true);
|
|
|
694 |
#endif
|
|
|
695 |
// This does not allocate memory for the whole image
|
|
|
696 |
// or such, so we are safe.
|
|
|
697 |
(void) jpeg_start_decompress(&cinfo);
|
|
|
698 |
result = true;
|
|
|
699 |
switch (cinfo.output_components) {
|
|
|
700 |
case 1:
|
|
|
701 |
format = QImage::Format_Indexed8;
|
|
|
702 |
break;
|
|
|
703 |
case 3:
|
|
|
704 |
case 4:
|
|
|
705 |
format = QImage::Format_RGB32;
|
|
|
706 |
break;
|
|
|
707 |
default:
|
|
|
708 |
result = false;
|
|
|
709 |
break;
|
|
|
710 |
}
|
|
|
711 |
cinfo.output_scanline = cinfo.output_height;
|
|
|
712 |
(void) jpeg_finish_decompress(&cinfo);
|
|
|
713 |
}
|
|
|
714 |
jpeg_destroy_decompress(&cinfo);
|
|
|
715 |
delete iod_src;
|
|
|
716 |
return result;
|
|
|
717 |
}
|
|
|
718 |
|
|
|
719 |
static bool ensureValidImage(QImage *dest, struct jpeg_decompress_struct *info,
|
|
|
720 |
bool dummy = false)
|
|
|
721 |
{
|
|
|
722 |
QImage::Format format;
|
|
|
723 |
switch (info->output_components) {
|
|
|
724 |
case 1:
|
|
|
725 |
format = QImage::Format_Indexed8;
|
|
|
726 |
break;
|
|
|
727 |
case 3:
|
|
|
728 |
case 4:
|
|
|
729 |
format = QImage::Format_RGB32;
|
|
|
730 |
break;
|
|
|
731 |
default:
|
|
|
732 |
return false; // unsupported format
|
|
|
733 |
}
|
|
|
734 |
|
|
|
735 |
const QSize size(info->output_width, info->output_height);
|
|
|
736 |
if (dest->size() != size || dest->format() != format) {
|
|
|
737 |
static uchar dummyImage[1];
|
|
|
738 |
if (dummy) // Create QImage but don't read the pixels
|
|
|
739 |
*dest = QImage(dummyImage, size.width(), size.height(), format);
|
|
|
740 |
else
|
|
|
741 |
*dest = QImage(size, format);
|
|
|
742 |
|
|
|
743 |
if (format == QImage::Format_Indexed8) {
|
|
|
744 |
dest->setNumColors(256);
|
|
|
745 |
for (int i = 0; i < 256; i++)
|
|
|
746 |
dest->setColor(i, qRgb(i,i,i));
|
|
|
747 |
}
|
|
|
748 |
}
|
|
|
749 |
|
|
|
750 |
return !dest->isNull();
|
|
|
751 |
}
|
|
|
752 |
|
|
|
753 |
static bool read_jpeg_image(QIODevice *device, QImage *outImage,
|
|
|
754 |
const QByteArray ¶meters, QSize scaledSize,
|
|
|
755 |
int inQuality )
|
|
|
756 |
{
|
|
|
757 |
#ifdef QT_NO_IMAGE_SMOOTHSCALE
|
|
|
758 |
Q_UNUSED( scaledSize );
|
|
|
759 |
#endif
|
|
|
760 |
|
|
|
761 |
struct jpeg_decompress_struct cinfo;
|
|
|
762 |
|
|
|
763 |
struct my_jpeg_source_mgr *iod_src = new my_jpeg_source_mgr(device);
|
|
|
764 |
struct my_error_mgr jerr;
|
|
|
765 |
|
|
|
766 |
jpeg_create_decompress(&cinfo);
|
|
|
767 |
|
|
|
768 |
cinfo.src = iod_src;
|
|
|
769 |
|
|
|
770 |
cinfo.err = jpeg_std_error(&jerr);
|
|
|
771 |
jerr.error_exit = my_error_exit;
|
|
|
772 |
|
|
|
773 |
if (!setjmp(jerr.setjmp_buffer)) {
|
|
|
774 |
#if defined(Q_OS_UNIXWARE)
|
|
|
775 |
(void) jpeg_read_header(&cinfo, B_TRUE);
|
|
|
776 |
#else
|
|
|
777 |
(void) jpeg_read_header(&cinfo, true);
|
|
|
778 |
#endif
|
|
|
779 |
|
|
|
780 |
// -1 means default quality.
|
|
|
781 |
int quality = inQuality;
|
|
|
782 |
if (quality < 0)
|
|
|
783 |
quality = 75;
|
|
|
784 |
|
|
|
785 |
QString params = QString::fromLatin1(parameters);
|
|
|
786 |
params.simplified();
|
|
|
787 |
int sWidth = 0, sHeight = 0;
|
|
|
788 |
char sModeStr[1024] = "";
|
|
|
789 |
Qt::AspectRatioMode sMode;
|
|
|
790 |
|
|
|
791 |
#ifndef QT_NO_IMAGE_SMOOTHSCALE
|
|
|
792 |
// If high quality not required, shrink image during decompression
|
|
|
793 |
if (scaledSize.isValid() && !scaledSize.isEmpty() && quality < HIGH_QUALITY_THRESHOLD
|
|
|
794 |
&& !params.contains(QLatin1String("GetHeaderInformation")) ) {
|
|
|
795 |
cinfo.scale_denom = qMin(cinfo.image_width / scaledSize.width(),
|
|
|
796 |
cinfo.image_width / scaledSize.height());
|
|
|
797 |
if (cinfo.scale_denom < 2) {
|
|
|
798 |
cinfo.scale_denom = 1;
|
|
|
799 |
} else if (cinfo.scale_denom < 4) {
|
|
|
800 |
cinfo.scale_denom = 2;
|
|
|
801 |
} else if (cinfo.scale_denom < 8) {
|
|
|
802 |
cinfo.scale_denom = 4;
|
|
|
803 |
} else {
|
|
|
804 |
cinfo.scale_denom = 8;
|
|
|
805 |
}
|
|
|
806 |
cinfo.scale_num = 1;
|
|
|
807 |
}
|
|
|
808 |
#endif
|
|
|
809 |
|
|
|
810 |
|
|
|
811 |
// If high quality not required, use fast decompression
|
|
|
812 |
if( quality < HIGH_QUALITY_THRESHOLD ) {
|
|
|
813 |
cinfo.dct_method = JDCT_IFAST;
|
|
|
814 |
cinfo.do_fancy_upsampling = FALSE;
|
|
|
815 |
}
|
|
|
816 |
|
|
|
817 |
|
|
|
818 |
(void) jpeg_start_decompress(&cinfo);
|
|
|
819 |
|
|
|
820 |
if (params.contains(QLatin1String("GetHeaderInformation"))) {
|
|
|
821 |
if (!ensureValidImage(outImage, &cinfo, true))
|
|
|
822 |
longjmp(jerr.setjmp_buffer, 1);
|
|
|
823 |
} else if (params.contains(QLatin1String("Scale"))) {
|
|
|
824 |
#if defined(_MSC_VER) && _MSC_VER >= 1400 && !defined(Q_OS_WINCE)
|
|
|
825 |
sscanf_s(params.toLatin1().data(), "Scale(%i, %i, %1023s)",
|
|
|
826 |
&sWidth, &sHeight, sModeStr, sizeof(sModeStr));
|
|
|
827 |
#else
|
|
|
828 |
sscanf(params.toLatin1().data(), "Scale(%i, %i, %1023s)",
|
|
|
829 |
&sWidth, &sHeight, sModeStr);
|
|
|
830 |
#endif
|
|
|
831 |
|
|
|
832 |
QString sModeQStr(QString::fromLatin1(sModeStr));
|
|
|
833 |
if (sModeQStr == QLatin1String("IgnoreAspectRatio")) {
|
|
|
834 |
sMode = Qt::IgnoreAspectRatio;
|
|
|
835 |
} else if (sModeQStr == QLatin1String("KeepAspectRatio")) {
|
|
|
836 |
sMode = Qt::KeepAspectRatio;
|
|
|
837 |
} else if (sModeQStr == QLatin1String("KeepAspectRatioByExpanding")) {
|
|
|
838 |
sMode = Qt::KeepAspectRatioByExpanding;
|
|
|
839 |
} else {
|
|
|
840 |
qDebug("read_jpeg_image: invalid aspect ratio mode \"%s\", see QImage::AspectRatioMode documentation", sModeStr);
|
|
|
841 |
sMode = Qt::KeepAspectRatio;
|
|
|
842 |
}
|
|
|
843 |
|
|
|
844 |
// qDebug("Parameters ask to scale the image to %i x %i AspectRatioMode: %s", sWidth, sHeight, sModeStr);
|
|
|
845 |
scaleSize(sWidth, sHeight, cinfo.output_width, cinfo.output_height, sMode);
|
|
|
846 |
// qDebug("Scaling the jpeg to %i x %i", sWidth, sHeight, sModeStr);
|
|
|
847 |
|
|
|
848 |
if (cinfo.output_components == 3 || cinfo.output_components == 4) {
|
|
|
849 |
if (outImage->size() != QSize(sWidth, sHeight) || outImage->format() != QImage::Format_RGB32)
|
|
|
850 |
*outImage = QImage(sWidth, sHeight, QImage::Format_RGB32);
|
|
|
851 |
} else if (cinfo.output_components == 1) {
|
|
|
852 |
if (outImage->size() != QSize(sWidth, sHeight) || outImage->format() != QImage::Format_Indexed8)
|
|
|
853 |
*outImage = QImage(sWidth, sHeight, QImage::Format_Indexed8);
|
|
|
854 |
outImage->setNumColors(256);
|
|
|
855 |
for (int i = 0; i < 256; ++i)
|
|
|
856 |
outImage->setColor(i, qRgb(i,i,i));
|
|
|
857 |
} else {
|
|
|
858 |
// Unsupported format
|
|
|
859 |
}
|
|
|
860 |
if (outImage->isNull())
|
|
|
861 |
longjmp(jerr.setjmp_buffer, 1);
|
|
|
862 |
|
|
|
863 |
if (!outImage->isNull()) {
|
|
|
864 |
QImage tmpImage(cinfo.output_width, 1, QImage::Format_RGB32);
|
|
|
865 |
uchar* inData = tmpImage.bits();
|
|
|
866 |
uchar* outData = outImage->bits();
|
|
|
867 |
int out_bpl = outImage->bytesPerLine();
|
|
|
868 |
while (cinfo.output_scanline < cinfo.output_height) {
|
|
|
869 |
int outputLine = sHeight * cinfo.output_scanline / cinfo.output_height;
|
|
|
870 |
(void) jpeg_read_scanlines(&cinfo, &inData, 1);
|
|
|
871 |
if (cinfo.output_components == 3) {
|
|
|
872 |
uchar *in = inData;
|
|
|
873 |
QRgb *out = (QRgb*)outData + outputLine * out_bpl;
|
|
|
874 |
for (uint i=0; i<cinfo.output_width; i++) {
|
|
|
875 |
// ### Only scaling down an image works, I don't think scaling up will work at the moment
|
|
|
876 |
// ### An idea I have to make this a smooth scale is to progressively add the pixel values up
|
|
|
877 |
// When scaling down, multiple values are being over drawn in to the output buffer.
|
|
|
878 |
// Instead, a weighting based on the distance the line or pixel is from the output pixel determines
|
|
|
879 |
// the weight of it when added to the output buffer. At present it is a non-smooth scale which is
|
|
|
880 |
// inefficently implemented, it still uncompresses all the jpeg, an optimization for progressive
|
|
|
881 |
// jpegs could be made if scaling by say 50% or some other special cases
|
|
|
882 |
out[sWidth * i / cinfo.output_width] = qRgb(in[0], in[1], in[2]);
|
|
|
883 |
in += 3;
|
|
|
884 |
}
|
|
|
885 |
} else {
|
|
|
886 |
// ### Need to test the case where the jpeg is grayscale, need some black and white jpegs to test
|
|
|
887 |
// this code. (also only scales down and probably won't scale to a larger size)
|
|
|
888 |
uchar *in = inData;
|
|
|
889 |
uchar *out = outData + outputLine*out_bpl;
|
|
|
890 |
for (uint i=0; i<cinfo.output_width; i++) {
|
|
|
891 |
out[sWidth * i / cinfo.output_width] = in[i];
|
|
|
892 |
}
|
|
|
893 |
}
|
|
|
894 |
}
|
|
|
895 |
(void) jpeg_finish_decompress(&cinfo);
|
|
|
896 |
}
|
|
|
897 |
#ifndef QT_NO_IMAGE_SMOOTHSCALE
|
|
|
898 |
} else if (scaledSize.isValid() && scaledSize != QSize(cinfo.output_width, cinfo.output_height)
|
|
|
899 |
&& quality >= HIGH_QUALITY_THRESHOLD) {
|
|
|
900 |
|
|
|
901 |
jpegSmoothScaler scaler(&cinfo, QString().sprintf("Scale( %d, %d, ScaleFree )",
|
|
|
902 |
scaledSize.width(),
|
|
|
903 |
scaledSize.height()).toLatin1().data());
|
|
|
904 |
*outImage = scaler.scale();
|
|
|
905 |
#endif
|
|
|
906 |
} else {
|
|
|
907 |
if (!ensureValidImage(outImage, &cinfo))
|
|
|
908 |
longjmp(jerr.setjmp_buffer, 1);
|
|
|
909 |
|
|
|
910 |
uchar* data = outImage->bits();
|
|
|
911 |
int bpl = outImage->bytesPerLine();
|
|
|
912 |
while (cinfo.output_scanline < cinfo.output_height) {
|
|
|
913 |
uchar *d = data + cinfo.output_scanline * bpl;
|
|
|
914 |
(void) jpeg_read_scanlines(&cinfo,
|
|
|
915 |
&d,
|
|
|
916 |
1);
|
|
|
917 |
}
|
|
|
918 |
(void) jpeg_finish_decompress(&cinfo);
|
|
|
919 |
|
|
|
920 |
if (cinfo.output_components == 3) {
|
|
|
921 |
// Expand 24->32 bpp.
|
|
|
922 |
for (uint j=0; j<cinfo.output_height; j++) {
|
|
|
923 |
uchar *in = outImage->scanLine(j) + cinfo.output_width * 3;
|
|
|
924 |
QRgb *out = (QRgb*)outImage->scanLine(j);
|
|
|
925 |
|
|
|
926 |
for (uint i=cinfo.output_width; i--;) {
|
|
|
927 |
in-=3;
|
|
|
928 |
out[i] = qRgb(in[0], in[1], in[2]);
|
|
|
929 |
}
|
|
|
930 |
}
|
|
|
931 |
} else if (cinfo.out_color_space == JCS_CMYK) {
|
|
|
932 |
for (uint j = 0; j < cinfo.output_height; ++j) {
|
|
|
933 |
uchar *in = outImage->scanLine(j) + cinfo.output_width * 4;
|
|
|
934 |
QRgb *out = (QRgb*)outImage->scanLine(j);
|
|
|
935 |
|
|
|
936 |
for (uint i = cinfo.output_width; i--; ) {
|
|
|
937 |
in-=4;
|
|
|
938 |
int k = in[3];
|
|
|
939 |
out[i] = qRgb(k * in[0] / 255, k * in[1] / 255, k * in[2] / 255);
|
|
|
940 |
}
|
|
|
941 |
}
|
|
|
942 |
}
|
|
|
943 |
if (cinfo.density_unit == 1) {
|
|
|
944 |
outImage->setDotsPerMeterX(int(100. * cinfo.X_density / 2.54));
|
|
|
945 |
outImage->setDotsPerMeterY(int(100. * cinfo.Y_density / 2.54));
|
|
|
946 |
} else if (cinfo.density_unit == 2) {
|
|
|
947 |
outImage->setDotsPerMeterX(int(100. * cinfo.X_density));
|
|
|
948 |
outImage->setDotsPerMeterY(int(100. * cinfo.Y_density));
|
|
|
949 |
}
|
|
|
950 |
|
|
|
951 |
if (scaledSize.isValid() && scaledSize != QSize(cinfo.output_width, cinfo.output_height))
|
|
|
952 |
*outImage = outImage->scaled(scaledSize, Qt::IgnoreAspectRatio, Qt::FastTransformation);
|
|
|
953 |
}
|
|
|
954 |
}
|
|
|
955 |
|
|
|
956 |
jpeg_destroy_decompress(&cinfo);
|
|
|
957 |
delete iod_src;
|
|
|
958 |
return !outImage->isNull();
|
|
|
959 |
}
|
|
|
960 |
|
|
|
961 |
|
|
|
962 |
struct my_jpeg_destination_mgr : public jpeg_destination_mgr {
|
|
|
963 |
// Nothing dynamic - cannot rely on destruction over longjump
|
|
|
964 |
QIODevice *device;
|
|
|
965 |
JOCTET buffer[max_buf];
|
|
|
966 |
|
|
|
967 |
public:
|
|
|
968 |
my_jpeg_destination_mgr(QIODevice *);
|
|
|
969 |
};
|
|
|
970 |
|
|
|
971 |
|
|
|
972 |
#if defined(Q_C_CALLBACKS)
|
|
|
973 |
extern "C" {
|
|
|
974 |
#endif
|
|
|
975 |
|
|
|
976 |
static void qt_init_destination(j_compress_ptr)
|
|
|
977 |
{
|
|
|
978 |
}
|
|
|
979 |
|
|
|
980 |
static boolean qt_empty_output_buffer(j_compress_ptr cinfo)
|
|
|
981 |
{
|
|
|
982 |
my_jpeg_destination_mgr* dest = (my_jpeg_destination_mgr*)cinfo->dest;
|
|
|
983 |
|
|
|
984 |
int written = dest->device->write((char*)dest->buffer, max_buf);
|
|
|
985 |
if (written == -1)
|
|
|
986 |
(*cinfo->err->error_exit)((j_common_ptr)cinfo);
|
|
|
987 |
|
|
|
988 |
dest->next_output_byte = dest->buffer;
|
|
|
989 |
dest->free_in_buffer = max_buf;
|
|
|
990 |
|
|
|
991 |
#if defined(Q_OS_UNIXWARE)
|
|
|
992 |
return B_TRUE;
|
|
|
993 |
#else
|
|
|
994 |
return true;
|
|
|
995 |
#endif
|
|
|
996 |
}
|
|
|
997 |
|
|
|
998 |
static void qt_term_destination(j_compress_ptr cinfo)
|
|
|
999 |
{
|
|
|
1000 |
my_jpeg_destination_mgr* dest = (my_jpeg_destination_mgr*)cinfo->dest;
|
|
|
1001 |
qint64 n = max_buf - dest->free_in_buffer;
|
|
|
1002 |
|
|
|
1003 |
qint64 written = dest->device->write((char*)dest->buffer, n);
|
|
|
1004 |
if (written == -1)
|
|
|
1005 |
(*cinfo->err->error_exit)((j_common_ptr)cinfo);
|
|
|
1006 |
}
|
|
|
1007 |
|
|
|
1008 |
#if defined(Q_C_CALLBACKS)
|
|
|
1009 |
}
|
|
|
1010 |
#endif
|
|
|
1011 |
|
|
|
1012 |
inline my_jpeg_destination_mgr::my_jpeg_destination_mgr(QIODevice *device)
|
|
|
1013 |
{
|
|
|
1014 |
jpeg_destination_mgr::init_destination = qt_init_destination;
|
|
|
1015 |
jpeg_destination_mgr::empty_output_buffer = qt_empty_output_buffer;
|
|
|
1016 |
jpeg_destination_mgr::term_destination = qt_term_destination;
|
|
|
1017 |
this->device = device;
|
|
|
1018 |
next_output_byte = buffer;
|
|
|
1019 |
free_in_buffer = max_buf;
|
|
|
1020 |
}
|
|
|
1021 |
|
|
|
1022 |
|
|
|
1023 |
static bool write_jpeg_image(const QImage &sourceImage, QIODevice *device, int sourceQuality)
|
|
|
1024 |
{
|
|
|
1025 |
bool success = false;
|
|
|
1026 |
const QImage image = sourceImage;
|
|
|
1027 |
const QVector<QRgb> cmap = image.colorTable();
|
|
|
1028 |
|
|
|
1029 |
struct jpeg_compress_struct cinfo;
|
|
|
1030 |
JSAMPROW row_pointer[1];
|
|
|
1031 |
row_pointer[0] = 0;
|
|
|
1032 |
|
|
|
1033 |
struct my_jpeg_destination_mgr *iod_dest = new my_jpeg_destination_mgr(device);
|
|
|
1034 |
struct my_error_mgr jerr;
|
|
|
1035 |
|
|
|
1036 |
cinfo.err = jpeg_std_error(&jerr);
|
|
|
1037 |
jerr.error_exit = my_error_exit;
|
|
|
1038 |
|
|
|
1039 |
if (!setjmp(jerr.setjmp_buffer)) {
|
|
|
1040 |
// WARNING:
|
|
|
1041 |
// this if loop is inside a setjmp/longjmp branch
|
|
|
1042 |
// do not create C++ temporaries here because the destructor may never be called
|
|
|
1043 |
// if you allocate memory, make sure that you can free it (row_pointer[0])
|
|
|
1044 |
jpeg_create_compress(&cinfo);
|
|
|
1045 |
|
|
|
1046 |
cinfo.dest = iod_dest;
|
|
|
1047 |
|
|
|
1048 |
cinfo.image_width = image.width();
|
|
|
1049 |
cinfo.image_height = image.height();
|
|
|
1050 |
|
|
|
1051 |
bool gray=false;
|
|
|
1052 |
switch (image.format()) {
|
|
|
1053 |
case QImage::Format_Mono:
|
|
|
1054 |
case QImage::Format_MonoLSB:
|
|
|
1055 |
case QImage::Format_Indexed8:
|
|
|
1056 |
gray = true;
|
|
|
1057 |
for (int i = image.numColors(); gray && i--;) {
|
|
|
1058 |
gray = gray & (qRed(cmap[i]) == qGreen(cmap[i]) &&
|
|
|
1059 |
qRed(cmap[i]) == qBlue(cmap[i]));
|
|
|
1060 |
}
|
|
|
1061 |
cinfo.input_components = gray ? 1 : 3;
|
|
|
1062 |
cinfo.in_color_space = gray ? JCS_GRAYSCALE : JCS_RGB;
|
|
|
1063 |
break;
|
|
|
1064 |
default:
|
|
|
1065 |
cinfo.input_components = 3;
|
|
|
1066 |
cinfo.in_color_space = JCS_RGB;
|
|
|
1067 |
}
|
|
|
1068 |
|
|
|
1069 |
jpeg_set_defaults(&cinfo);
|
|
|
1070 |
|
|
|
1071 |
qreal diffInch = qAbs(image.dotsPerMeterX()*2.54/100. - qRound(image.dotsPerMeterX()*2.54/100.))
|
|
|
1072 |
+ qAbs(image.dotsPerMeterY()*2.54/100. - qRound(image.dotsPerMeterY()*2.54/100.));
|
|
|
1073 |
qreal diffCm = (qAbs(image.dotsPerMeterX()/100. - qRound(image.dotsPerMeterX()/100.))
|
|
|
1074 |
+ qAbs(image.dotsPerMeterY()/100. - qRound(image.dotsPerMeterY()/100.)))*2.54;
|
|
|
1075 |
if (diffInch < diffCm) {
|
|
|
1076 |
cinfo.density_unit = 1; // dots/inch
|
|
|
1077 |
cinfo.X_density = qRound(image.dotsPerMeterX()*2.54/100.);
|
|
|
1078 |
cinfo.Y_density = qRound(image.dotsPerMeterY()*2.54/100.);
|
|
|
1079 |
} else {
|
|
|
1080 |
cinfo.density_unit = 2; // dots/cm
|
|
|
1081 |
cinfo.X_density = (image.dotsPerMeterX()+50) / 100;
|
|
|
1082 |
cinfo.Y_density = (image.dotsPerMeterY()+50) / 100;
|
|
|
1083 |
}
|
|
|
1084 |
|
|
|
1085 |
|
|
|
1086 |
int quality = sourceQuality >= 0 ? qMin(sourceQuality,100) : 75;
|
|
|
1087 |
#if defined(Q_OS_UNIXWARE)
|
|
|
1088 |
jpeg_set_quality(&cinfo, quality, B_TRUE /* limit to baseline-JPEG values */);
|
|
|
1089 |
jpeg_start_compress(&cinfo, B_TRUE);
|
|
|
1090 |
#else
|
|
|
1091 |
jpeg_set_quality(&cinfo, quality, true /* limit to baseline-JPEG values */);
|
|
|
1092 |
jpeg_start_compress(&cinfo, true);
|
|
|
1093 |
#endif
|
|
|
1094 |
|
|
|
1095 |
row_pointer[0] = new uchar[cinfo.image_width*cinfo.input_components];
|
|
|
1096 |
int w = cinfo.image_width;
|
|
|
1097 |
while (cinfo.next_scanline < cinfo.image_height) {
|
|
|
1098 |
uchar *row = row_pointer[0];
|
|
|
1099 |
switch (image.format()) {
|
|
|
1100 |
case QImage::Format_Mono:
|
|
|
1101 |
case QImage::Format_MonoLSB:
|
|
|
1102 |
if (gray) {
|
|
|
1103 |
const uchar* data = image.scanLine(cinfo.next_scanline);
|
|
|
1104 |
if (image.format() == QImage::Format_MonoLSB) {
|
|
|
1105 |
for (int i=0; i<w; i++) {
|
|
|
1106 |
bool bit = !!(*(data + (i >> 3)) & (1 << (i & 7)));
|
|
|
1107 |
row[i] = qRed(cmap[bit]);
|
|
|
1108 |
}
|
|
|
1109 |
} else {
|
|
|
1110 |
for (int i=0; i<w; i++) {
|
|
|
1111 |
bool bit = !!(*(data + (i >> 3)) & (1 << (7 -(i & 7))));
|
|
|
1112 |
row[i] = qRed(cmap[bit]);
|
|
|
1113 |
}
|
|
|
1114 |
}
|
|
|
1115 |
} else {
|
|
|
1116 |
const uchar* data = image.scanLine(cinfo.next_scanline);
|
|
|
1117 |
if (image.format() == QImage::Format_MonoLSB) {
|
|
|
1118 |
for (int i=0; i<w; i++) {
|
|
|
1119 |
bool bit = !!(*(data + (i >> 3)) & (1 << (i & 7)));
|
|
|
1120 |
*row++ = qRed(cmap[bit]);
|
|
|
1121 |
*row++ = qGreen(cmap[bit]);
|
|
|
1122 |
*row++ = qBlue(cmap[bit]);
|
|
|
1123 |
}
|
|
|
1124 |
} else {
|
|
|
1125 |
for (int i=0; i<w; i++) {
|
|
|
1126 |
bool bit = !!(*(data + (i >> 3)) & (1 << (7 -(i & 7))));
|
|
|
1127 |
*row++ = qRed(cmap[bit]);
|
|
|
1128 |
*row++ = qGreen(cmap[bit]);
|
|
|
1129 |
*row++ = qBlue(cmap[bit]);
|
|
|
1130 |
}
|
|
|
1131 |
}
|
|
|
1132 |
}
|
|
|
1133 |
break;
|
|
|
1134 |
case QImage::Format_Indexed8:
|
|
|
1135 |
if (gray) {
|
|
|
1136 |
const uchar* pix = image.scanLine(cinfo.next_scanline);
|
|
|
1137 |
for (int i=0; i<w; i++) {
|
|
|
1138 |
*row = qRed(cmap[*pix]);
|
|
|
1139 |
++row; ++pix;
|
|
|
1140 |
}
|
|
|
1141 |
} else {
|
|
|
1142 |
const uchar* pix = image.scanLine(cinfo.next_scanline);
|
|
|
1143 |
for (int i=0; i<w; i++) {
|
|
|
1144 |
*row++ = qRed(cmap[*pix]);
|
|
|
1145 |
*row++ = qGreen(cmap[*pix]);
|
|
|
1146 |
*row++ = qBlue(cmap[*pix]);
|
|
|
1147 |
++pix;
|
|
|
1148 |
}
|
|
|
1149 |
}
|
|
|
1150 |
break;
|
|
|
1151 |
case QImage::Format_RGB888:
|
|
|
1152 |
memcpy(row, image.scanLine(cinfo.next_scanline), w * 3);
|
|
|
1153 |
break;
|
|
|
1154 |
case QImage::Format_RGB32:
|
|
|
1155 |
case QImage::Format_ARGB32:
|
|
|
1156 |
case QImage::Format_ARGB32_Premultiplied: {
|
|
|
1157 |
QRgb* rgb = (QRgb*)image.scanLine(cinfo.next_scanline);
|
|
|
1158 |
for (int i=0; i<w; i++) {
|
|
|
1159 |
*row++ = qRed(*rgb);
|
|
|
1160 |
*row++ = qGreen(*rgb);
|
|
|
1161 |
*row++ = qBlue(*rgb);
|
|
|
1162 |
++rgb;
|
|
|
1163 |
}
|
|
|
1164 |
break;
|
|
|
1165 |
}
|
|
|
1166 |
default:
|
|
|
1167 |
qWarning("QJpegHandler: unable to write image of format %i",
|
|
|
1168 |
image.format());
|
|
|
1169 |
break;
|
|
|
1170 |
}
|
|
|
1171 |
jpeg_write_scanlines(&cinfo, row_pointer, 1);
|
|
|
1172 |
}
|
|
|
1173 |
|
|
|
1174 |
jpeg_finish_compress(&cinfo);
|
|
|
1175 |
jpeg_destroy_compress(&cinfo);
|
|
|
1176 |
success = true;
|
|
|
1177 |
} else {
|
|
|
1178 |
jpeg_destroy_compress(&cinfo);
|
|
|
1179 |
success = false;
|
|
|
1180 |
}
|
|
|
1181 |
|
|
|
1182 |
delete iod_dest;
|
|
|
1183 |
delete [] row_pointer[0];
|
|
|
1184 |
return success;
|
|
|
1185 |
}
|
|
|
1186 |
|
|
|
1187 |
QJpegHandler::QJpegHandler()
|
|
|
1188 |
{
|
|
|
1189 |
quality = 75;
|
|
|
1190 |
}
|
|
|
1191 |
|
|
|
1192 |
bool QJpegHandler::canRead() const
|
|
|
1193 |
{
|
|
|
1194 |
if (canRead(device())) {
|
|
|
1195 |
setFormat("jpeg");
|
|
|
1196 |
return true;
|
|
|
1197 |
}
|
|
|
1198 |
return false;
|
|
|
1199 |
}
|
|
|
1200 |
|
|
|
1201 |
bool QJpegHandler::canRead(QIODevice *device)
|
|
|
1202 |
{
|
|
|
1203 |
if (!device) {
|
|
|
1204 |
qWarning("QJpegHandler::canRead() called with no device");
|
|
|
1205 |
return false;
|
|
|
1206 |
}
|
|
|
1207 |
|
|
|
1208 |
return device->peek(2) == "\xFF\xD8";
|
|
|
1209 |
}
|
|
|
1210 |
|
|
|
1211 |
bool QJpegHandler::read(QImage *image)
|
|
|
1212 |
{
|
|
|
1213 |
if (!canRead())
|
|
|
1214 |
return false;
|
|
|
1215 |
return read_jpeg_image(device(), image, parameters, scaledSize, quality);
|
|
|
1216 |
}
|
|
|
1217 |
|
|
|
1218 |
bool QJpegHandler::write(const QImage &image)
|
|
|
1219 |
{
|
|
|
1220 |
return write_jpeg_image(image, device(), quality);
|
|
|
1221 |
}
|
|
|
1222 |
|
|
|
1223 |
bool QJpegHandler::supportsOption(ImageOption option) const
|
|
|
1224 |
{
|
|
|
1225 |
return option == Quality
|
|
|
1226 |
#ifndef QT_NO_IMAGE_SMOOTHSCALE
|
|
|
1227 |
|| option == ScaledSize
|
|
|
1228 |
#endif
|
|
|
1229 |
|| option == Size
|
|
|
1230 |
|| option == ImageFormat;
|
|
|
1231 |
}
|
|
|
1232 |
|
|
|
1233 |
QVariant QJpegHandler::option(ImageOption option) const
|
|
|
1234 |
{
|
|
|
1235 |
if (option == Quality) {
|
|
|
1236 |
return quality;
|
|
|
1237 |
#ifndef QT_NO_IMAGE_SMOOTHSCALE
|
|
|
1238 |
} else if (option == ScaledSize) {
|
|
|
1239 |
return scaledSize;
|
|
|
1240 |
#endif
|
|
|
1241 |
} else if (option == Size) {
|
|
|
1242 |
if (canRead() && !device()->isSequential()) {
|
|
|
1243 |
qint64 pos = device()->pos();
|
|
|
1244 |
int width = 0;
|
|
|
1245 |
int height = 0;
|
|
|
1246 |
read_jpeg_size(device(), width, height);
|
|
|
1247 |
device()->seek(pos);
|
|
|
1248 |
return QSize(width, height);
|
|
|
1249 |
}
|
|
|
1250 |
} else if (option == ImageFormat) {
|
|
|
1251 |
if (canRead() && !device()->isSequential()) {
|
|
|
1252 |
qint64 pos = device()->pos();
|
|
|
1253 |
QImage::Format format = QImage::Format_Invalid;
|
|
|
1254 |
read_jpeg_format(device(), format);
|
|
|
1255 |
device()->seek(pos);
|
|
|
1256 |
return format;
|
|
|
1257 |
}
|
|
|
1258 |
return QImage::Format_Invalid;
|
|
|
1259 |
}
|
|
|
1260 |
return QVariant();
|
|
|
1261 |
}
|
|
|
1262 |
|
|
|
1263 |
void QJpegHandler::setOption(ImageOption option, const QVariant &value)
|
|
|
1264 |
{
|
|
|
1265 |
if (option == Quality)
|
|
|
1266 |
quality = value.toInt();
|
|
|
1267 |
#ifndef QT_NO_IMAGE_SMOOTHSCALE
|
|
|
1268 |
else if ( option == ScaledSize )
|
|
|
1269 |
scaledSize = value.toSize();
|
|
|
1270 |
#endif
|
|
|
1271 |
}
|
|
|
1272 |
|
|
|
1273 |
QByteArray QJpegHandler::name() const
|
|
|
1274 |
{
|
|
|
1275 |
return "jpeg";
|
|
|
1276 |
}
|
|
|
1277 |
|
|
|
1278 |
QT_END_NAMESPACE
|