qimagescale.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2015 The Qt Company Ltd.-
4** Contact: http://www.qt.io/licensing/-
5**-
6** This file is part of the QtGui module of the Qt Toolkit.-
7**-
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9** Commercial License Usage-
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15** information use the contact form at http://www.qt.io/contact-us.-
16**-
17** GNU Lesser General Public License Usage-
18** Alternatively, this file may be used under the terms of the GNU Lesser-
19** General Public License version 2.1 or version 3 as published by the Free-
20** Software Foundation and appearing in the file LICENSE.LGPLv21 and-
21** LICENSE.LGPLv3 included in the packaging of this file. Please review the-
22** following information to ensure the GNU Lesser General Public License-
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26** As a special exception, The Qt Company gives you certain additional-
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29**-
30** $QT_END_LICENSE$-
31**-
32****************************************************************************/-
33#include <private/qimagescale_p.h>-
34#include <private/qdrawhelper_p.h>-
35-
36#include "qimage.h"-
37#include "qcolor.h"-
38-
39QT_BEGIN_NAMESPACE-
40-
41/*-
42 * Copyright (C) 2004, 2005 Daniel M. Duley-
43 *-
44 * Redistribution and use in source and binary forms, with or without-
45 * modification, are permitted provided that the following conditions-
46 * are met:-
47 *-
48 * 1. Redistributions of source code must retain the above copyright-
49 * notice, this list of conditions and the following disclaimer.-
50 * 2. Redistributions in binary form must reproduce the above copyright-
51 * notice, this list of conditions and the following disclaimer in the-
52 * documentation and/or other materials provided with the distribution.-
53 *-
54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR-
55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES-
56 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.-
57 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,-
58 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
59 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,-
60 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY-
61 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT-
62 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF-
63 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.-
64 *-
65 */-
66-
67/* OTHER CREDITS:-
68 *-
69 * This is the normal smoothscale method, based on Imlib2's smoothscale.-
70 *-
71 * Originally I took the algorithm used in NetPBM and Qt and added MMX/3dnow-
72 * optimizations. It ran in about 1/2 the time as Qt. Then I ported Imlib's-
73 * C algorithm and it ran at about the same speed as my MMX optimized one...-
74 * Finally I ported Imlib's MMX version and it ran in less than half the-
75 * time as my MMX algorithm, (taking only a quarter of the time Qt does).-
76 * After further optimization it seems to run at around 1/6th.-
77 *-
78 * Changes include formatting, namespaces and other C++'ings, removal of old-
79 * #ifdef'ed code, and removal of unneeded border calculation code.-
80 * Later the code has been refactored, an SSE4.1 optimizated path have been-
81 * added instead of the removed MMX assembler, and scaling of clipped area-
82 * removed.-
83 *-
84 * Imlib2 is (C) Carsten Haitzler and various contributors. The MMX code-
85 * is by Willem Monsuwe <willem@stack.nl>. All other modifications are-
86 * (C) Daniel M. Duley.-
87 */-
88-
89-
90namespace QImageScale {-
91 const unsigned int** qimageCalcYPoints(const unsigned int *src, int sw, int sh, int dh);-
92 int* qimageCalcXPoints(int sw, int dw);-
93 int* qimageCalcApoints(int s, int d, int up);-
94 QImageScaleInfo* qimageFreeScaleInfo(QImageScaleInfo *isi);-
95 QImageScaleInfo *qimageCalcScaleInfo(const QImage &img, int sw, int sh,-
96 int dw, int dh, char aa);-
97}-
98-
99using namespace QImageScale;-
100-
101//-
102// Code ported from Imlib...-
103//-
104-
105const unsigned int** QImageScale::qimageCalcYPoints(const unsigned int *src,-
106 int sw, int sh, int dh)-
107{-
108 const unsigned int **p;-
109 int j = 0, rv = 0;-
110 qint64 val, inc;-
111-
112 if (dh < 0) {
dh < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
113 dh = -dh;-
114 rv = 1;-
115 }
never executed: end of block
0
116 p = new const unsigned int* [dh+1];-
117-
118 int up = qAbs(dh) >= sh;-
119 val = up ? 0x8000 * sh / dh - 0x8000 : 0;
upDescription
TRUEnever evaluated
FALSEnever evaluated
0
120 inc = (((qint64)sh) << 16) / dh;-
121 for (int i = 0; i < dh; i++) {
i < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
122 p[j++] = src + qMax(0LL, val >> 16) * sw;-
123 val += inc;-
124 }
never executed: end of block
0
125 if (rv) {
rvDescription
TRUEnever evaluated
FALSEnever evaluated
0
126 for (int i = dh / 2; --i >= 0; ) {
--i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
127 const unsigned int *tmp = p[i];-
128 p[i] = p[dh - i - 1];-
129 p[dh - i - 1] = tmp;-
130 }
never executed: end of block
0
131 }
never executed: end of block
0
132 return(p);
never executed: return(p);
0
133}-
134-
135int* QImageScale::qimageCalcXPoints(int sw, int dw)-
136{-
137 int *p, j = 0, rv = 0;-
138 qint64 val, inc;-
139-
140 if (dw < 0) {
dw < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
141 dw = -dw;-
142 rv = 1;-
143 }
never executed: end of block
0
144 p = new int[dw+1];-
145-
146 int up = qAbs(dw) >= sw;-
147 val = up ? 0x8000 * sw / dw - 0x8000 : 0;
upDescription
TRUEnever evaluated
FALSEnever evaluated
0
148 inc = (((qint64)sw) << 16) / dw;-
149 for (int i = 0; i < dw; i++) {
i < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
150 p[j++] = qMax(0LL, val >> 16);-
151 val += inc;-
152 }
never executed: end of block
0
153-
154 if (rv) {
rvDescription
TRUEnever evaluated
FALSEnever evaluated
0
155 for (int i = dw / 2; --i >= 0; ) {
--i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
156 int tmp = p[i];-
157 p[i] = p[dw - i - 1];-
158 p[dw - i - 1] = tmp;-
159 }
never executed: end of block
0
160 }
never executed: end of block
0
161 return p;
never executed: return p;
0
162}-
163-
164int* QImageScale::qimageCalcApoints(int s, int d, int up)-
165{-
166 int *p, j = 0, rv = 0;-
167-
168 if (d < 0) {
d < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
169 rv = 1;-
170 d = -d;-
171 }
never executed: end of block
0
172 p = new int[d];-
173-
174 if (up) {
upDescription
TRUEnever evaluated
FALSEnever evaluated
0
175 /* scaling up */-
176 qint64 val = 0x8000 * s / d - 0x8000;-
177 qint64 inc = (((qint64)s) << 16) / d;-
178 for (int i = 0; i < d; i++) {
i < dDescription
TRUEnever evaluated
FALSEnever evaluated
0
179 int pos = val >> 16;-
180 if (pos < 0)
pos < 0Description
TRUEnever evaluated
FALSEnever evaluated
0
181 p[j++] = 0;
never executed: p[j++] = 0;
0
182 else if (pos >= (s - 1))
pos >= (s - 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
183 p[j++] = 0;
never executed: p[j++] = 0;
0
184 else-
185 p[j++] = (val >> 8) - ((val >> 8) & 0xffffff00);
never executed: p[j++] = (val >> 8) - ((val >> 8) & 0xffffff00);
0
186 val += inc;-
187 }
never executed: end of block
0
188 } else {
never executed: end of block
0
189 /* scaling down */-
190 qint64 val = 0;-
191 qint64 inc = (((qint64)s) << 16) / d;-
192 int Cp = (((d << 14) + s - 1) / s);-
193 for (int i = 0; i < d; i++) {
i < dDescription
TRUEnever evaluated
FALSEnever evaluated
0
194 int ap = ((0x10000 - (val & 0xffff)) * Cp) >> 16;-
195 p[j] = ap | (Cp << 16);-
196 j++;-
197 val += inc;-
198 }
never executed: end of block
0
199 }
never executed: end of block
0
200 if (rv) {
rvDescription
TRUEnever evaluated
FALSEnever evaluated
0
201 int tmp;-
202 for (int i = d / 2; --i >= 0; ) {
--i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
203 tmp = p[i];-
204 p[i] = p[d - i - 1];-
205 p[d - i - 1] = tmp;-
206 }
never executed: end of block
0
207 }
never executed: end of block
0
208 return p;
never executed: return p;
0
209}-
210-
211QImageScaleInfo* QImageScale::qimageFreeScaleInfo(QImageScaleInfo *isi)-
212{-
213 if (isi) {
isiDescription
TRUEnever evaluated
FALSEnever evaluated
0
214 delete[] isi->xpoints;-
215 delete[] isi->ypoints;-
216 delete[] isi->xapoints;-
217 delete[] isi->yapoints;-
218 delete isi;-
219 }
never executed: end of block
0
220 return 0;
never executed: return 0;
0
221}-
222-
223QImageScaleInfo* QImageScale::qimageCalcScaleInfo(const QImage &img,-
224 int sw, int sh,-
225 int dw, int dh, char aa)-
226{-
227 QImageScaleInfo *isi;-
228 int scw, sch;-
229-
230 scw = dw * qlonglong(img.width()) / sw;-
231 sch = dh * qlonglong(img.height()) / sh;-
232-
233 isi = new QImageScaleInfo;-
234 if (!isi)
!isiDescription
TRUEnever evaluated
FALSEnever evaluated
0
235 return 0;
never executed: return 0;
0
236 memset(isi, 0, sizeof(QImageScaleInfo));-
237-
238 isi->xup_yup = (qAbs(dw) >= sw) + ((qAbs(dh) >= sh) << 1);-
239-
240 isi->xpoints = qimageCalcXPoints(img.width(), scw);-
241 if (!isi->xpoints)
!isi->xpointsDescription
TRUEnever evaluated
FALSEnever evaluated
0
242 return qimageFreeScaleInfo(isi);
never executed: return qimageFreeScaleInfo(isi);
0
243 isi->ypoints = qimageCalcYPoints((const unsigned int *)img.scanLine(0),-
244 img.bytesPerLine() / 4, img.height(), sch);-
245 if (!isi->ypoints)
!isi->ypointsDescription
TRUEnever evaluated
FALSEnever evaluated
0
246 return qimageFreeScaleInfo(isi);
never executed: return qimageFreeScaleInfo(isi);
0
247 if (aa) {
aaDescription
TRUEnever evaluated
FALSEnever evaluated
0
248 isi->xapoints = qimageCalcApoints(img.width(), scw, isi->xup_yup & 1);-
249 if (!isi->xapoints)
!isi->xapointsDescription
TRUEnever evaluated
FALSEnever evaluated
0
250 return qimageFreeScaleInfo(isi);
never executed: return qimageFreeScaleInfo(isi);
0
251 isi->yapoints = qimageCalcApoints(img.height(), sch, isi->xup_yup & 2);-
252 if (!isi->yapoints)
!isi->yapointsDescription
TRUEnever evaluated
FALSEnever evaluated
0
253 return qimageFreeScaleInfo(isi);
never executed: return qimageFreeScaleInfo(isi);
0
254 }
never executed: end of block
0
255 return isi;
never executed: return isi;
0
256}-
257-
258-
259static void qt_qimageScaleAARGBA_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
260 int dw, int dh, int dow, int sow);-
261-
262static void qt_qimageScaleAARGBA_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
263 int dw, int dh, int dow, int sow);-
264-
265static void qt_qimageScaleAARGBA_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
266 int dw, int dh, int dow, int sow);-
267-
268#if defined(QT_COMPILER_SUPPORTS_SSE4_1)-
269template<bool RGB>-
270void qt_qimageScaleAARGBA_up_x_down_y_sse4(QImageScaleInfo *isi, unsigned int *dest,-
271 int dw, int dh, int dow, int sow);-
272template<bool RGB>-
273void qt_qimageScaleAARGBA_down_x_up_y_sse4(QImageScaleInfo *isi, unsigned int *dest,-
274 int dw, int dh, int dow, int sow);-
275template<bool RGB>-
276void qt_qimageScaleAARGBA_down_xy_sse4(QImageScaleInfo *isi, unsigned int *dest,-
277 int dw, int dh, int dow, int sow);-
278#endif-
279-
280static void qt_qimageScaleAARGBA_up_xy(QImageScaleInfo *isi, unsigned int *dest,-
281 int dw, int dh, int dow, int sow)-
282{-
283 const unsigned int **ypoints = isi->ypoints;-
284 int *xpoints = isi->xpoints;-
285 int *xapoints = isi->xapoints;-
286 int *yapoints = isi->yapoints;-
287-
288 /* go through every scanline in the output buffer */-
289 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
290 /* calculate the source line we'll scan from */-
291 const unsigned int *sptr = ypoints[y];-
292 unsigned int *dptr = dest + (y * dow);-
293 const int yap = yapoints[y];-
294 if (yap > 0) {
yap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
295 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
296 const unsigned int *pix = sptr + xpoints[x];-
297 const int xap = xapoints[x];-
298 if (xap > 0)
xap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
299 *dptr = interpolate_4_pixels(pix[0], pix[1], pix[sow], pix[sow + 1], xap, yap);
never executed: *dptr = interpolate_4_pixels(pix[0], pix[1], pix[sow], pix[sow + 1], xap, yap);
0
300 else-
301 *dptr = INTERPOLATE_PIXEL_256(pix[0], 256 - yap, pix[sow], yap);
never executed: *dptr = INTERPOLATE_PIXEL_256(pix[0], 256 - yap, pix[sow], yap);
0
302 dptr++;-
303 }
never executed: end of block
0
304 } else {
never executed: end of block
0
305 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
306 const unsigned int *pix = sptr + xpoints[x];-
307 const int xap = xapoints[x];-
308 if (xap > 0)
xap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
309 *dptr = INTERPOLATE_PIXEL_256(pix[0], 256 - xap, pix[1], xap);
never executed: *dptr = INTERPOLATE_PIXEL_256(pix[0], 256 - xap, pix[1], xap);
0
310 else-
311 *dptr = pix[0];
never executed: *dptr = pix[0];
0
312 dptr++;-
313 }
never executed: end of block
0
314 }
never executed: end of block
0
315 }-
316}
never executed: end of block
0
317-
318/* scale by area sampling */-
319static void qt_qimageScaleAARGBA(QImageScaleInfo *isi, unsigned int *dest,-
320 int dw, int dh, int dow, int sow)-
321{-
322 /* scaling up both ways */-
323 if (isi->xup_yup == 3) {
isi->xup_yup == 3Description
TRUEnever evaluated
FALSEnever evaluated
0
324 qt_qimageScaleAARGBA_up_xy(isi, dest, dw, dh, dow, sow);-
325 }
never executed: end of block
0
326 /* if we're scaling down vertically */-
327 else if (isi->xup_yup == 1) {
isi->xup_yup == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
328#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
329 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
330 qt_qimageScaleAARGBA_up_x_down_y_sse4<false>(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_up_x_down_y_sse4<false>(isi, dest, dw, dh, dow, sow);
0
331 else-
332#endif-
333 qt_qimageScaleAARGBA_up_x_down_y(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_up_x_down_y(isi, dest, dw, dh, dow, sow);
0
334 }-
335 /* if we're scaling down horizontally */-
336 else if (isi->xup_yup == 2) {
isi->xup_yup == 2Description
TRUEnever evaluated
FALSEnever evaluated
0
337#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
338 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
339 qt_qimageScaleAARGBA_down_x_up_y_sse4<false>(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_down_x_up_y_sse4<false>(isi, dest, dw, dh, dow, sow);
0
340 else-
341#endif-
342 qt_qimageScaleAARGBA_down_x_up_y(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_down_x_up_y(isi, dest, dw, dh, dow, sow);
0
343 }-
344 /* if we're scaling down horizontally & vertically */-
345 else {-
346#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
347 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
348 qt_qimageScaleAARGBA_down_xy_sse4<false>(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_down_xy_sse4<false>(isi, dest, dw, dh, dow, sow);
0
349 else-
350#endif-
351 qt_qimageScaleAARGBA_down_xy(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_down_xy(isi, dest, dw, dh, dow, sow);
0
352 }-
353}-
354-
355inline static void qt_qimageScaleAARGBA_helper(const unsigned int *pix, int xyap, int Cxy, int step, int &r, int &g, int &b, int &a)-
356{-
357 r = qRed(*pix) * xyap;-
358 g = qGreen(*pix) * xyap;-
359 b = qBlue(*pix) * xyap;-
360 a = qAlpha(*pix) * xyap;-
361 int j;-
362 for (j = (1 << 14) - xyap; j > Cxy; j -= Cxy) {
j > CxyDescription
TRUEnever evaluated
FALSEnever evaluated
0
363 pix += step;-
364 r += qRed(*pix) * Cxy;-
365 g += qGreen(*pix) * Cxy;-
366 b += qBlue(*pix) * Cxy;-
367 a += qAlpha(*pix) * Cxy;-
368 }
never executed: end of block
0
369 pix += step;-
370 r += qRed(*pix) * j;-
371 g += qGreen(*pix) * j;-
372 b += qBlue(*pix) * j;-
373 a += qAlpha(*pix) * j;-
374}
never executed: end of block
0
375-
376static void qt_qimageScaleAARGBA_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
377 int dw, int dh, int dow, int sow)-
378{-
379 const unsigned int **ypoints = isi->ypoints;-
380 int *xpoints = isi->xpoints;-
381 int *xapoints = isi->xapoints;-
382 int *yapoints = isi->yapoints;-
383-
384 /* go through every scanline in the output buffer */-
385 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
386 int Cy = yapoints[y] >> 16;-
387 int yap = yapoints[y] & 0xffff;-
388-
389 unsigned int *dptr = dest + (y * dow);-
390 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
391 const unsigned int *sptr = ypoints[y] + xpoints[x];-
392 int r, g, b, a;-
393 qt_qimageScaleAARGBA_helper(sptr, yap, Cy, sow, r, g, b, a);-
394-
395 int xap = xapoints[x];-
396 if (xap > 0) {
xap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
397 int rr, gg, bb, aa;-
398 qt_qimageScaleAARGBA_helper(sptr + 1, yap, Cy, sow, rr, gg, bb, aa);-
399-
400 r = r * (256 - xap);-
401 g = g * (256 - xap);-
402 b = b * (256 - xap);-
403 a = a * (256 - xap);-
404 r = (r + (rr * xap)) >> 8;-
405 g = (g + (gg * xap)) >> 8;-
406 b = (b + (bb * xap)) >> 8;-
407 a = (a + (aa * xap)) >> 8;-
408 }
never executed: end of block
0
409 *dptr++ = qRgba(r >> 14, g >> 14, b >> 14, a >> 14);-
410 }
never executed: end of block
0
411 }
never executed: end of block
0
412}
never executed: end of block
0
413-
414static void qt_qimageScaleAARGBA_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
415 int dw, int dh, int dow, int sow)-
416{-
417 const unsigned int **ypoints = isi->ypoints;-
418 int *xpoints = isi->xpoints;-
419 int *xapoints = isi->xapoints;-
420 int *yapoints = isi->yapoints;-
421-
422 /* go through every scanline in the output buffer */-
423 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
424 unsigned int *dptr = dest + (y * dow);-
425 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
426 int Cx = xapoints[x] >> 16;-
427 int xap = xapoints[x] & 0xffff;-
428-
429 const unsigned int *sptr = ypoints[y] + xpoints[x];-
430 int r, g, b, a;-
431 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, r, g, b, a);-
432-
433 int yap = yapoints[y];-
434 if (yap > 0) {
yap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
435 int rr, gg, bb, aa;-
436 qt_qimageScaleAARGBA_helper(sptr + sow, xap, Cx, 1, rr, gg, bb, aa);-
437-
438 r = r * (256 - yap);-
439 g = g * (256 - yap);-
440 b = b * (256 - yap);-
441 a = a * (256 - yap);-
442 r = (r + (rr * yap)) >> 8;-
443 g = (g + (gg * yap)) >> 8;-
444 b = (b + (bb * yap)) >> 8;-
445 a = (a + (aa * yap)) >> 8;-
446 }
never executed: end of block
0
447 *dptr = qRgba(r >> 14, g >> 14, b >> 14, a >> 14);-
448 dptr++;-
449 }
never executed: end of block
0
450 }
never executed: end of block
0
451}
never executed: end of block
0
452-
453static void qt_qimageScaleAARGBA_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
454 int dw, int dh, int dow, int sow)-
455{-
456 const unsigned int **ypoints = isi->ypoints;-
457 int *xpoints = isi->xpoints;-
458 int *xapoints = isi->xapoints;-
459 int *yapoints = isi->yapoints;-
460-
461 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
462 int Cy = (yapoints[y]) >> 16;-
463 int yap = (yapoints[y]) & 0xffff;-
464-
465 unsigned int *dptr = dest + (y * dow);-
466 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
467 int Cx = xapoints[x] >> 16;-
468 int xap = xapoints[x] & 0xffff;-
469-
470 const unsigned int *sptr = ypoints[y] + xpoints[x];-
471 int rx, gx, bx, ax;-
472 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, rx, gx, bx, ax);-
473-
474 int r = ((rx>>4) * yap);-
475 int g = ((gx>>4) * yap);-
476 int b = ((bx>>4) * yap);-
477 int a = ((ax>>4) * yap);-
478-
479 int j;-
480 for (j = (1 << 14) - yap; j > Cy; j -= Cy) {
j > CyDescription
TRUEnever evaluated
FALSEnever evaluated
0
481 sptr += sow;-
482 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, rx, gx, bx, ax);-
483 r += ((rx>>4) * Cy);-
484 g += ((gx>>4) * Cy);-
485 b += ((bx>>4) * Cy);-
486 a += ((ax>>4) * Cy);-
487 }
never executed: end of block
0
488 sptr += sow;-
489 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, rx, gx, bx, ax);-
490-
491 r += ((rx>>4) * j);-
492 g += ((gx>>4) * j);-
493 b += ((bx>>4) * j);-
494 a += ((ax>>4) * j);-
495-
496 *dptr = qRgba(r >> 24, g >> 24, b >> 24, a >> 24);-
497 dptr++;-
498 }
never executed: end of block
0
499 }
never executed: end of block
0
500}
never executed: end of block
0
501-
502static void qt_qimageScaleAARGB_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
503 int dw, int dh, int dow, int sow);-
504-
505static void qt_qimageScaleAARGB_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
506 int dw, int dh, int dow, int sow);-
507-
508static void qt_qimageScaleAARGB_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
509 int dw, int dh, int dow, int sow);-
510-
511/* scale by area sampling - IGNORE the ALPHA byte*/-
512static void qt_qimageScaleAARGB(QImageScaleInfo *isi, unsigned int *dest,-
513 int dw, int dh, int dow, int sow)-
514{-
515 /* scaling up both ways */-
516 if (isi->xup_yup == 3) {
isi->xup_yup == 3Description
TRUEnever evaluated
FALSEnever evaluated
0
517 qt_qimageScaleAARGBA_up_xy(isi, dest, dw, dh, dow, sow);-
518 }
never executed: end of block
0
519 /* if we're scaling down vertically */-
520 else if (isi->xup_yup == 1) {
isi->xup_yup == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
521#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
522 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
523 qt_qimageScaleAARGBA_up_x_down_y_sse4<true>(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_up_x_down_y_sse4<true>(isi, dest, dw, dh, dow, sow);
0
524 else-
525#endif-
526 qt_qimageScaleAARGB_up_x_down_y(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGB_up_x_down_y(isi, dest, dw, dh, dow, sow);
0
527 }-
528 /* if we're scaling down horizontally */-
529 else if (isi->xup_yup == 2) {
isi->xup_yup == 2Description
TRUEnever evaluated
FALSEnever evaluated
0
530#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
531 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
532 qt_qimageScaleAARGBA_down_x_up_y_sse4<true>(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_down_x_up_y_sse4<true>(isi, dest, dw, dh, dow, sow);
0
533 else-
534#endif-
535 qt_qimageScaleAARGB_down_x_up_y(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGB_down_x_up_y(isi, dest, dw, dh, dow, sow);
0
536 }-
537 /* if we're scaling down horizontally & vertically */-
538 else {-
539#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
540 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
541 qt_qimageScaleAARGBA_down_xy_sse4<true>(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_down_xy_sse4<true>(isi, dest, dw, dh, dow, sow);
0
542 else-
543#endif-
544 qt_qimageScaleAARGB_down_xy(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGB_down_xy(isi, dest, dw, dh, dow, sow);
0
545 }-
546}-
547-
548-
549inline static void qt_qimageScaleAARGB_helper(const unsigned int *pix, int xyap, int Cxy, int step, int &r, int &g, int &b)-
550{-
551 r = qRed(*pix) * xyap;-
552 g = qGreen(*pix) * xyap;-
553 b = qBlue(*pix) * xyap;-
554 int j;-
555 for (j = (1 << 14) - xyap; j > Cxy; j -= Cxy) {
j > CxyDescription
TRUEnever evaluated
FALSEnever evaluated
0
556 pix += step;-
557 r += qRed(*pix) * Cxy;-
558 g += qGreen(*pix) * Cxy;-
559 b += qBlue(*pix) * Cxy;-
560 }
never executed: end of block
0
561 pix += step;-
562 r += qRed(*pix) * j;-
563 g += qGreen(*pix) * j;-
564 b += qBlue(*pix) * j;-
565}
never executed: end of block
0
566-
567static void qt_qimageScaleAARGB_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
568 int dw, int dh, int dow, int sow)-
569{-
570 const unsigned int **ypoints = isi->ypoints;-
571 int *xpoints = isi->xpoints;-
572 int *xapoints = isi->xapoints;-
573 int *yapoints = isi->yapoints;-
574-
575 /* go through every scanline in the output buffer */-
576 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
577 int Cy = yapoints[y] >> 16;-
578 int yap = yapoints[y] & 0xffff;-
579-
580 unsigned int *dptr = dest + (y * dow);-
581 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
582 const unsigned int *sptr = ypoints[y] + xpoints[x];-
583 int r, g, b;-
584 qt_qimageScaleAARGB_helper(sptr, yap, Cy, sow, r, g, b);-
585-
586 int xap = xapoints[x];-
587 if (xap > 0) {
xap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
588 int rr, bb, gg;-
589 qt_qimageScaleAARGB_helper(sptr + 1, yap, Cy, sow, rr, gg, bb);-
590-
591 r = r * (256 - xap);-
592 g = g * (256 - xap);-
593 b = b * (256 - xap);-
594 r = (r + (rr * xap)) >> 8;-
595 g = (g + (gg * xap)) >> 8;-
596 b = (b + (bb * xap)) >> 8;-
597 }
never executed: end of block
0
598 *dptr++ = qRgb(r >> 14, g >> 14, b >> 14);-
599 }
never executed: end of block
0
600 }
never executed: end of block
0
601}
never executed: end of block
0
602-
603static void qt_qimageScaleAARGB_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
604 int dw, int dh, int dow, int sow)-
605{-
606 const unsigned int **ypoints = isi->ypoints;-
607 int *xpoints = isi->xpoints;-
608 int *xapoints = isi->xapoints;-
609 int *yapoints = isi->yapoints;-
610-
611 /* go through every scanline in the output buffer */-
612 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
613 unsigned int *dptr = dest + (y * dow);-
614 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
615 int Cx = xapoints[x] >> 16;-
616 int xap = xapoints[x] & 0xffff;-
617-
618 const unsigned int *sptr = ypoints[y] + xpoints[x];-
619 int r, g, b;-
620 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, r, g, b);-
621-
622 int yap = yapoints[y];-
623 if (yap > 0) {
yap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
624 int rr, bb, gg;-
625 qt_qimageScaleAARGB_helper(sptr + sow, xap, Cx, 1, rr, gg, bb);-
626-
627 r = r * (256 - yap);-
628 g = g * (256 - yap);-
629 b = b * (256 - yap);-
630 r = (r + (rr * yap)) >> 8;-
631 g = (g + (gg * yap)) >> 8;-
632 b = (b + (bb * yap)) >> 8;-
633 }
never executed: end of block
0
634 *dptr++ = qRgb(r >> 14, g >> 14, b >> 14);-
635 }
never executed: end of block
0
636 }
never executed: end of block
0
637}
never executed: end of block
0
638-
639static void qt_qimageScaleAARGB_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
640 int dw, int dh, int dow, int sow)-
641{-
642 const unsigned int **ypoints = isi->ypoints;-
643 int *xpoints = isi->xpoints;-
644 int *xapoints = isi->xapoints;-
645 int *yapoints = isi->yapoints;-
646-
647 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
648 int Cy = yapoints[y] >> 16;-
649 int yap = yapoints[y] & 0xffff;-
650-
651 unsigned int *dptr = dest + (y * dow);-
652 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
653 int Cx = xapoints[x] >> 16;-
654 int xap = xapoints[x] & 0xffff;-
655-
656 const unsigned int *sptr = ypoints[y] + xpoints[x];-
657 int rx, gx, bx;-
658 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, rx, gx, bx);-
659-
660 int r = (rx >> 4) * yap;-
661 int g = (gx >> 4) * yap;-
662 int b = (bx >> 4) * yap;-
663-
664 int j;-
665 for (j = (1 << 14) - yap; j > Cy; j -= Cy) {
j > CyDescription
TRUEnever evaluated
FALSEnever evaluated
0
666 sptr += sow;-
667 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, rx, gx, bx);-
668-
669 r += (rx >> 4) * Cy;-
670 g += (gx >> 4) * Cy;-
671 b += (bx >> 4) * Cy;-
672 }
never executed: end of block
0
673 sptr += sow;-
674 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, rx, gx, bx);-
675-
676 r += (rx >> 4) * j;-
677 g += (gx >> 4) * j;-
678 b += (bx >> 4) * j;-
679-
680 *dptr = qRgb(r >> 24, g >> 24, b >> 24);-
681 dptr++;-
682 }
never executed: end of block
0
683 }
never executed: end of block
0
684}
never executed: end of block
0
685-
686QImage qSmoothScaleImage(const QImage &src, int dw, int dh)-
687{-
688 QImage buffer;-
689 if (src.isNull() || dw <= 0 || dh <= 0)
src.isNull()Description
TRUEnever evaluated
FALSEnever evaluated
dw <= 0Description
TRUEnever evaluated
FALSEnever evaluated
dh <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
690 return buffer;
never executed: return buffer;
0
691-
692 int w = src.width();-
693 int h = src.height();-
694 QImageScaleInfo *scaleinfo =-
695 qimageCalcScaleInfo(src, w, h, dw, dh, true);-
696 if (!scaleinfo)
!scaleinfoDescription
TRUEnever evaluated
FALSEnever evaluated
0
697 return buffer;
never executed: return buffer;
0
698-
699 buffer = QImage(dw, dh, src.format());-
700 if (buffer.isNull()) {
buffer.isNull()Description
TRUEnever evaluated
FALSEnever evaluated
0
701 qWarning("QImage: out of memory, returning null");-
702 qimageFreeScaleInfo(scaleinfo);-
703 return QImage();
never executed: return QImage();
0
704 }-
705-
706 if (src.hasAlphaChannel())
src.hasAlphaChannel()Description
TRUEnever evaluated
FALSEnever evaluated
0
707 qt_qimageScaleAARGBA(scaleinfo, (unsigned int *)buffer.scanLine(0),
never executed: qt_qimageScaleAARGBA(scaleinfo, (unsigned int *)buffer.scanLine(0), dw, dh, dw, src.bytesPerLine() / 4);
0
708 dw, dh, dw, src.bytesPerLine() / 4);
never executed: qt_qimageScaleAARGBA(scaleinfo, (unsigned int *)buffer.scanLine(0), dw, dh, dw, src.bytesPerLine() / 4);
0
709 else-
710 qt_qimageScaleAARGB(scaleinfo, (unsigned int *)buffer.scanLine(0),
never executed: qt_qimageScaleAARGB(scaleinfo, (unsigned int *)buffer.scanLine(0), dw, dh, dw, src.bytesPerLine() / 4);
0
711 dw, dh, dw, src.bytesPerLine() / 4);
never executed: qt_qimageScaleAARGB(scaleinfo, (unsigned int *)buffer.scanLine(0), dw, dh, dw, src.bytesPerLine() / 4);
0
712-
713 qimageFreeScaleInfo(scaleinfo);-
714 return buffer;
never executed: return buffer;
0
715}-
716-
717QT_END_NAMESPACE-
Source codeSwitch to Preprocessed file
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