qimagescale.cpp

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2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
5**-
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22** ensure the GNU Lesser General Public License version 3 requirements-
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38****************************************************************************/-
39#include <private/qimagescale_p.h>-
40#include <private/qdrawhelper_p.h>-
41-
42#include "qimage.h"-
43#include "qcolor.h"-
44-
45QT_BEGIN_NAMESPACE-
46-
47/*-
48 * Copyright (C) 2004, 2005 Daniel M. Duley-
49 *-
50 * Redistribution and use in source and binary forms, with or without-
51 * modification, are permitted provided that the following conditions-
52 * are met:-
53 *-
54 * 1. Redistributions of source code must retain the above copyright-
55 * notice, this list of conditions and the following disclaimer.-
56 * 2. Redistributions in binary form must reproduce the above copyright-
57 * notice, this list of conditions and the following disclaimer in the-
58 * documentation and/or other materials provided with the distribution.-
59 *-
60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR-
61 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES-
62 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.-
63 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,-
64 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
65 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,-
66 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY-
67 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT-
68 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF-
69 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.-
70 *-
71 */-
72-
73/* OTHER CREDITS:-
74 *-
75 * This is the normal smoothscale method, based on Imlib2's smoothscale.-
76 *-
77 * Originally I took the algorithm used in NetPBM and Qt and added MMX/3dnow-
78 * optimizations. It ran in about 1/2 the time as Qt. Then I ported Imlib's-
79 * C algorithm and it ran at about the same speed as my MMX optimized one...-
80 * Finally I ported Imlib's MMX version and it ran in less than half the-
81 * time as my MMX algorithm, (taking only a quarter of the time Qt does).-
82 * After further optimization it seems to run at around 1/6th.-
83 *-
84 * Changes include formatting, namespaces and other C++'ings, removal of old-
85 * #ifdef'ed code, and removal of unneeded border calculation code.-
86 * Later the code has been refactored, an SSE4.1 optimizated path have been-
87 * added instead of the removed MMX assembler, and scaling of clipped area-
88 * removed.-
89 *-
90 * Imlib2 is (C) Carsten Haitzler and various contributors. The MMX code-
91 * is by Willem Monsuwe <willem@stack.nl>. All other modifications are-
92 * (C) Daniel M. Duley.-
93 */-
94-
95-
96namespace QImageScale {-
97 const unsigned int** qimageCalcYPoints(const unsigned int *src, int sw, int sh, int dh);-
98 int* qimageCalcXPoints(int sw, int dw);-
99 int* qimageCalcApoints(int s, int d, int up);-
100 QImageScaleInfo* qimageFreeScaleInfo(QImageScaleInfo *isi);-
101 QImageScaleInfo *qimageCalcScaleInfo(const QImage &img, int sw, int sh,-
102 int dw, int dh, char aa);-
103}-
104-
105using namespace QImageScale;-
106-
107//-
108// Code ported from Imlib...-
109//-
110-
111const unsigned int** QImageScale::qimageCalcYPoints(const unsigned int *src,-
112 int sw, int sh, int dh)-
113{-
114 const unsigned int **p;-
115 int j = 0, rv = 0;-
116 qint64 val, inc;-
117-
118 if (dh < 0) {-
119 dh = -dh;-
120 rv = 1;-
121 }-
122 p = new const unsigned int* [dh+1];-
123-
124 int up = qAbs(dh) >= sh;-
125 val = up ? 0x8000 * sh / dh - 0x8000 : 0;-
126 inc = (((qint64)sh) << 16) / dh;-
127 for (int i = 0; i < dh; i++) {-
128 p[j++] = src + qMax(0LL, val >> 16) * sw;-
129 val += inc;-
130 }-
131 if (rv) {-
132 for (int i = dh / 2; --i >= 0; ) {-
133 const unsigned int *tmp = p[i];-
134 p[i] = p[dh - i - 1];-
135 p[dh - i - 1] = tmp;-
136 }-
137 }-
138 return(p);-
139}-
140-
141int* QImageScale::qimageCalcXPoints(int sw, int dw)-
142{-
143 int *p, j = 0, rv = 0;-
144 qint64 val, inc;-
145-
146 if (dw < 0) {-
147 dw = -dw;-
148 rv = 1;-
149 }-
150 p = new int[dw+1];-
151-
152 int up = qAbs(dw) >= sw;-
153 val = up ? 0x8000 * sw / dw - 0x8000 : 0;-
154 inc = (((qint64)sw) << 16) / dw;-
155 for (int i = 0; i < dw; i++) {-
156 p[j++] = qMax(0LL, val >> 16);-
157 val += inc;-
158 }-
159-
160 if (rv) {-
161 for (int i = dw / 2; --i >= 0; ) {-
162 int tmp = p[i];-
163 p[i] = p[dw - i - 1];-
164 p[dw - i - 1] = tmp;-
165 }-
166 }-
167 return p;-
168}-
169-
170int* QImageScale::qimageCalcApoints(int s, int d, int up)-
171{-
172 int *p, j = 0, rv = 0;-
173-
174 if (d < 0) {-
175 rv = 1;-
176 d = -d;-
177 }-
178 p = new int[d];-
179-
180 if (up) {-
181 /* scaling up */-
182 qint64 val = 0x8000 * s / d - 0x8000;-
183 qint64 inc = (((qint64)s) << 16) / d;-
184 for (int i = 0; i < d; i++) {-
185 int pos = val >> 16;-
186 if (pos < 0)-
187 p[j++] = 0;-
188 else if (pos >= (s - 1))-
189 p[j++] = 0;-
190 else-
191 p[j++] = (val >> 8) - ((val >> 8) & 0xffffff00);-
192 val += inc;-
193 }-
194 } else {-
195 /* scaling down */-
196 qint64 val = 0;-
197 qint64 inc = (((qint64)s) << 16) / d;-
198 int Cp = (((d << 14) + s - 1) / s);-
199 for (int i = 0; i < d; i++) {-
200 int ap = ((0x10000 - (val & 0xffff)) * Cp) >> 16;-
201 p[j] = ap | (Cp << 16);-
202 j++;-
203 val += inc;-
204 }-
205 }-
206 if (rv) {-
207 int tmp;-
208 for (int i = d / 2; --i >= 0; ) {-
209 tmp = p[i];-
210 p[i] = p[d - i - 1];-
211 p[d - i - 1] = tmp;-
212 }-
213 }-
214 return p;-
215}-
216-
217QImageScaleInfo* QImageScale::qimageFreeScaleInfo(QImageScaleInfo *isi)-
218{-
219 if (isi) {-
220 delete[] isi->xpoints;-
221 delete[] isi->ypoints;-
222 delete[] isi->xapoints;-
223 delete[] isi->yapoints;-
224 delete isi;-
225 }-
226 return 0;-
227}-
228-
229QImageScaleInfo* QImageScale::qimageCalcScaleInfo(const QImage &img,-
230 int sw, int sh,-
231 int dw, int dh, char aa)-
232{-
233 QImageScaleInfo *isi;-
234 int scw, sch;-
235-
236 scw = dw * qlonglong(img.width()) / sw;-
237 sch = dh * qlonglong(img.height()) / sh;-
238-
239 isi = new QImageScaleInfo;-
240 if (!isi)-
241 return 0;-
242 memset(isi, 0, sizeof(QImageScaleInfo));-
243-
244 isi->xup_yup = (qAbs(dw) >= sw) + ((qAbs(dh) >= sh) << 1);-
245-
246 isi->xpoints = qimageCalcXPoints(img.width(), scw);-
247 if (!isi->xpoints)-
248 return qimageFreeScaleInfo(isi);-
249 isi->ypoints = qimageCalcYPoints((const unsigned int *)img.scanLine(0),-
250 img.bytesPerLine() / 4, img.height(), sch);-
251 if (!isi->ypoints)-
252 return qimageFreeScaleInfo(isi);-
253 if (aa) {-
254 isi->xapoints = qimageCalcApoints(img.width(), scw, isi->xup_yup & 1);-
255 if (!isi->xapoints)-
256 return qimageFreeScaleInfo(isi);-
257 isi->yapoints = qimageCalcApoints(img.height(), sch, isi->xup_yup & 2);-
258 if (!isi->yapoints)-
259 return qimageFreeScaleInfo(isi);-
260 }-
261 return isi;-
262}-
263-
264-
265static void qt_qimageScaleAARGBA_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
266 int dw, int dh, int dow, int sow);-
267-
268static void qt_qimageScaleAARGBA_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
269 int dw, int dh, int dow, int sow);-
270-
271static void qt_qimageScaleAARGBA_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
272 int dw, int dh, int dow, int sow);-
273-
274#if defined(QT_COMPILER_SUPPORTS_SSE4_1)-
275template<bool RGB>-
276void qt_qimageScaleAARGBA_up_x_down_y_sse4(QImageScaleInfo *isi, unsigned int *dest,-
277 int dw, int dh, int dow, int sow);-
278template<bool RGB>-
279void qt_qimageScaleAARGBA_down_x_up_y_sse4(QImageScaleInfo *isi, unsigned int *dest,-
280 int dw, int dh, int dow, int sow);-
281template<bool RGB>-
282void qt_qimageScaleAARGBA_down_xy_sse4(QImageScaleInfo *isi, unsigned int *dest,-
283 int dw, int dh, int dow, int sow);-
284#endif-
285-
286#if defined(__ARM_NEON__)-
287template<bool RGB>-
288void qt_qimageScaleAARGBA_up_x_down_y_neon(QImageScaleInfo *isi, unsigned int *dest,-
289 int dw, int dh, int dow, int sow);-
290template<bool RGB>-
291void qt_qimageScaleAARGBA_down_x_up_y_neon(QImageScaleInfo *isi, unsigned int *dest,-
292 int dw, int dh, int dow, int sow);-
293template<bool RGB>-
294void qt_qimageScaleAARGBA_down_xy_neon(QImageScaleInfo *isi, unsigned int *dest,-
295 int dw, int dh, int dow, int sow);-
296#endif-
297-
298static void qt_qimageScaleAARGBA_up_xy(QImageScaleInfo *isi, unsigned int *dest,-
299 int dw, int dh, int dow, int sow)-
300{-
301 const unsigned int **ypoints = isi->ypoints;-
302 int *xpoints = isi->xpoints;-
303 int *xapoints = isi->xapoints;-
304 int *yapoints = isi->yapoints;-
305-
306 /* go through every scanline in the output buffer */-
307 for (int y = 0; y < dh; y++) {
y < dhDescription
TRUEnever evaluated
FALSEnever evaluated
0
308 /* calculate the source line we'll scan from */-
309 const unsigned int *sptr = ypoints[y];-
310 unsigned int *dptr = dest + (y * dow);-
311 const int yap = yapoints[y];-
312 if (yap > 0) {
yap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
313 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
314 const unsigned int *pix = sptr + xpoints[x];-
315 const int xap = xapoints[x];-
316 if (xap > 0)
xap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
317 *dptr = interpolate_4_pixels(pix[0], pix[1],pix[sow],, pix [sow+ 1],sow, xap, yap);
never executed: *dptr = interpolate_4_pixels(pix, pix + sow, xap, yap);
0
318 else-
319 *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
320 dptr++;-
321 }
never executed: end of block
0
322 } else {
never executed: end of block
0
323 for (int x = 0; x < dw; x++) {
x < dwDescription
TRUEnever evaluated
FALSEnever evaluated
0
324 const unsigned int *pix = sptr + xpoints[x];-
325 const int xap = xapoints[x];-
326 if (xap > 0)
xap > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
327 *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
328 else-
329 *dptr = pix[0];
never executed: *dptr = pix[0];
0
330 dptr++;-
331 }
never executed: end of block
0
332 }
never executed: end of block
0
333 }-
334}
never executed: end of block
0
335-
336/* scale by area sampling */-
337static void qt_qimageScaleAARGBA(QImageScaleInfo *isi, unsigned int *dest,-
338 int dw, int dh, int dow, int sow)-
339{-
340 /* scaling up both ways */-
341 if (isi->xup_yup == 3) {
isi->xup_yup == 3Description
TRUEnever evaluated
FALSEnever evaluated
0
342 qt_qimageScaleAARGBA_up_xy(isi, dest, dw, dh, dow, sow);-
343 }
never executed: end of block
0
344 /* if we're scaling down vertically */-
345 else if (isi->xup_yup == 1) {
isi->xup_yup == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
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_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
349 else-
350#elif defined(__ARM_NEON__)-
351 if (qCpuHasFeature(NEON))-
352 qt_qimageScaleAARGBA_up_x_down_y_neon<false>(isi, dest, dw, dh, dow, sow);-
353 else-
354#endif-
355 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
356 }-
357 /* if we're scaling down horizontally */-
358 else if (isi->xup_yup == 2) {
isi->xup_yup == 2Description
TRUEnever evaluated
FALSEnever evaluated
0
359#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
360 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
361 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
362 else-
363#elif defined(__ARM_NEON__)-
364 if (qCpuHasFeature(NEON))-
365 qt_qimageScaleAARGBA_down_x_up_y_neon<false>(isi, dest, dw, dh, dow, sow);-
366 else-
367#endif-
368 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
369 }-
370 /* if we're scaling down horizontally & vertically */-
371 else {-
372#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
373 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
374 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
375 else-
376#elif defined(__ARM_NEON__)-
377 if (qCpuHasFeature(NEON))-
378 qt_qimageScaleAARGBA_down_xy_neon<false>(isi, dest, dw, dh, dow, sow);-
379 else-
380#endif-
381 qt_qimageScaleAARGBA_down_xy(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGBA_down_xy(isi, dest, dw, dh, dow, sow);
0
382 }-
383}-
384-
385inline static void qt_qimageScaleAARGBA_helper(const unsigned int *pix, int xyap, int Cxy, int step, int &r, int &g, int &b, int &a)-
386{-
387 r = qRed(*pix) * xyap;-
388 g = qGreen(*pix) * xyap;-
389 b = qBlue(*pix) * xyap;-
390 a = qAlpha(*pix) * xyap;-
391 int j;-
392 for (j = (1 << 14) - xyap; j > Cxy; j -= Cxy) {-
393 pix += step;-
394 r += qRed(*pix) * Cxy;-
395 g += qGreen(*pix) * Cxy;-
396 b += qBlue(*pix) * Cxy;-
397 a += qAlpha(*pix) * Cxy;-
398 }-
399 pix += step;-
400 r += qRed(*pix) * j;-
401 g += qGreen(*pix) * j;-
402 b += qBlue(*pix) * j;-
403 a += qAlpha(*pix) * j;-
404}-
405-
406static void qt_qimageScaleAARGBA_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
407 int dw, int dh, int dow, int sow)-
408{-
409 const unsigned int **ypoints = isi->ypoints;-
410 int *xpoints = isi->xpoints;-
411 int *xapoints = isi->xapoints;-
412 int *yapoints = isi->yapoints;-
413-
414 /* go through every scanline in the output buffer */-
415 for (int y = 0; y < dh; y++) {-
416 int Cy = yapoints[y] >> 16;-
417 int yap = yapoints[y] & 0xffff;-
418-
419 unsigned int *dptr = dest + (y * dow);-
420 for (int x = 0; x < dw; x++) {-
421 const unsigned int *sptr = ypoints[y] + xpoints[x];-
422 int r, g, b, a;-
423 qt_qimageScaleAARGBA_helper(sptr, yap, Cy, sow, r, g, b, a);-
424-
425 int xap = xapoints[x];-
426 if (xap > 0) {-
427 int rr, gg, bb, aa;-
428 qt_qimageScaleAARGBA_helper(sptr + 1, yap, Cy, sow, rr, gg, bb, aa);-
429-
430 r = r * (256 - xap);-
431 g = g * (256 - xap);-
432 b = b * (256 - xap);-
433 a = a * (256 - xap);-
434 r = (r + (rr * xap)) >> 8;-
435 g = (g + (gg * xap)) >> 8;-
436 b = (b + (bb * xap)) >> 8;-
437 a = (a + (aa * xap)) >> 8;-
438 }-
439 *dptr++ = qRgba(r >> 14, g >> 14, b >> 14, a >> 14);-
440 }-
441 }-
442}-
443-
444static void qt_qimageScaleAARGBA_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
445 int dw, int dh, int dow, int sow)-
446{-
447 const unsigned int **ypoints = isi->ypoints;-
448 int *xpoints = isi->xpoints;-
449 int *xapoints = isi->xapoints;-
450 int *yapoints = isi->yapoints;-
451-
452 /* go through every scanline in the output buffer */-
453 for (int y = 0; y < dh; y++) {-
454 unsigned int *dptr = dest + (y * dow);-
455 for (int x = 0; x < dw; x++) {-
456 int Cx = xapoints[x] >> 16;-
457 int xap = xapoints[x] & 0xffff;-
458-
459 const unsigned int *sptr = ypoints[y] + xpoints[x];-
460 int r, g, b, a;-
461 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, r, g, b, a);-
462-
463 int yap = yapoints[y];-
464 if (yap > 0) {-
465 int rr, gg, bb, aa;-
466 qt_qimageScaleAARGBA_helper(sptr + sow, xap, Cx, 1, rr, gg, bb, aa);-
467-
468 r = r * (256 - yap);-
469 g = g * (256 - yap);-
470 b = b * (256 - yap);-
471 a = a * (256 - yap);-
472 r = (r + (rr * yap)) >> 8;-
473 g = (g + (gg * yap)) >> 8;-
474 b = (b + (bb * yap)) >> 8;-
475 a = (a + (aa * yap)) >> 8;-
476 }-
477 *dptr = qRgba(r >> 14, g >> 14, b >> 14, a >> 14);-
478 dptr++;-
479 }-
480 }-
481}-
482-
483static void qt_qimageScaleAARGBA_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
484 int dw, int dh, int dow, int sow)-
485{-
486 const unsigned int **ypoints = isi->ypoints;-
487 int *xpoints = isi->xpoints;-
488 int *xapoints = isi->xapoints;-
489 int *yapoints = isi->yapoints;-
490-
491 for (int y = 0; y < dh; y++) {-
492 int Cy = (yapoints[y]) >> 16;-
493 int yap = (yapoints[y]) & 0xffff;-
494-
495 unsigned int *dptr = dest + (y * dow);-
496 for (int x = 0; x < dw; x++) {-
497 int Cx = xapoints[x] >> 16;-
498 int xap = xapoints[x] & 0xffff;-
499-
500 const unsigned int *sptr = ypoints[y] + xpoints[x];-
501 int rx, gx, bx, ax;-
502 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, rx, gx, bx, ax);-
503-
504 int r = ((rx>>4) * yap);-
505 int g = ((gx>>4) * yap);-
506 int b = ((bx>>4) * yap);-
507 int a = ((ax>>4) * yap);-
508-
509 int j;-
510 for (j = (1 << 14) - yap; j > Cy; j -= Cy) {-
511 sptr += sow;-
512 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, rx, gx, bx, ax);-
513 r += ((rx>>4) * Cy);-
514 g += ((gx>>4) * Cy);-
515 b += ((bx>>4) * Cy);-
516 a += ((ax>>4) * Cy);-
517 }-
518 sptr += sow;-
519 qt_qimageScaleAARGBA_helper(sptr, xap, Cx, 1, rx, gx, bx, ax);-
520-
521 r += ((rx>>4) * j);-
522 g += ((gx>>4) * j);-
523 b += ((bx>>4) * j);-
524 a += ((ax>>4) * j);-
525-
526 *dptr = qRgba(r >> 24, g >> 24, b >> 24, a >> 24);-
527 dptr++;-
528 }-
529 }-
530}-
531-
532static void qt_qimageScaleAARGB_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
533 int dw, int dh, int dow, int sow);-
534-
535static void qt_qimageScaleAARGB_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
536 int dw, int dh, int dow, int sow);-
537-
538static void qt_qimageScaleAARGB_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
539 int dw, int dh, int dow, int sow);-
540-
541/* scale by area sampling - IGNORE the ALPHA byte*/-
542static void qt_qimageScaleAARGB(QImageScaleInfo *isi, unsigned int *dest,-
543 int dw, int dh, int dow, int sow)-
544{-
545 /* scaling up both ways */-
546 if (isi->xup_yup == 3) {
isi->xup_yup == 3Description
TRUEnever evaluated
FALSEnever evaluated
0
547 qt_qimageScaleAARGBA_up_xy(isi, dest, dw, dh, dow, sow);-
548 }
never executed: end of block
0
549 /* if we're scaling down vertically */-
550 else if (isi->xup_yup == 1) {
isi->xup_yup == 1Description
TRUEnever evaluated
FALSEnever evaluated
0
551#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
552 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
553 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
554 else-
555#elif defined(__ARM_NEON__)-
556 if (qCpuHasFeature(NEON))-
557 qt_qimageScaleAARGBA_up_x_down_y_neon<true>(isi, dest, dw, dh, dow, sow);-
558 else-
559#endif-
560 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
561 }-
562 /* if we're scaling down horizontally */-
563 else if (isi->xup_yup == 2) {
isi->xup_yup == 2Description
TRUEnever evaluated
FALSEnever evaluated
0
564#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
565 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
566 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
567 else-
568#elif defined(__ARM_NEON__)-
569 if (qCpuHasFeature(NEON))-
570 qt_qimageScaleAARGBA_down_x_up_y_neon<true>(isi, dest, dw, dh, dow, sow);-
571 else-
572#endif-
573 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
574 }-
575 /* if we're scaling down horizontally & vertically */-
576 else {-
577#ifdef QT_COMPILER_SUPPORTS_SSE4_1-
578 if (qCpuHasFeature(SSE4_1))
(qCompilerCpuF...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
(qCpuFeatures(...eatureSSE4_1))Description
TRUEnever evaluated
FALSEnever evaluated
0
579 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
580 else-
581#elif defined(__ARM_NEON__)-
582 if (qCpuHasFeature(NEON))-
583 qt_qimageScaleAARGBA_down_xy_neon<true>(isi, dest, dw, dh, dow, sow);-
584 else-
585#endif-
586 qt_qimageScaleAARGB_down_xy(isi, dest, dw, dh, dow, sow);
never executed: qt_qimageScaleAARGB_down_xy(isi, dest, dw, dh, dow, sow);
0
587 }-
588}-
589-
590-
591inline static void qt_qimageScaleAARGB_helper(const unsigned int *pix, int xyap, int Cxy, int step, int &r, int &g, int &b)-
592{-
593 r = qRed(*pix) * xyap;-
594 g = qGreen(*pix) * xyap;-
595 b = qBlue(*pix) * xyap;-
596 int j;-
597 for (j = (1 << 14) - xyap; j > Cxy; j -= Cxy) {-
598 pix += step;-
599 r += qRed(*pix) * Cxy;-
600 g += qGreen(*pix) * Cxy;-
601 b += qBlue(*pix) * Cxy;-
602 }-
603 pix += step;-
604 r += qRed(*pix) * j;-
605 g += qGreen(*pix) * j;-
606 b += qBlue(*pix) * j;-
607}-
608-
609static void qt_qimageScaleAARGB_up_x_down_y(QImageScaleInfo *isi, unsigned int *dest,-
610 int dw, int dh, int dow, int sow)-
611{-
612 const unsigned int **ypoints = isi->ypoints;-
613 int *xpoints = isi->xpoints;-
614 int *xapoints = isi->xapoints;-
615 int *yapoints = isi->yapoints;-
616-
617 /* go through every scanline in the output buffer */-
618 for (int y = 0; y < dh; y++) {-
619 int Cy = yapoints[y] >> 16;-
620 int yap = yapoints[y] & 0xffff;-
621-
622 unsigned int *dptr = dest + (y * dow);-
623 for (int x = 0; x < dw; x++) {-
624 const unsigned int *sptr = ypoints[y] + xpoints[x];-
625 int r, g, b;-
626 qt_qimageScaleAARGB_helper(sptr, yap, Cy, sow, r, g, b);-
627-
628 int xap = xapoints[x];-
629 if (xap > 0) {-
630 int rr, bb, gg;-
631 qt_qimageScaleAARGB_helper(sptr + 1, yap, Cy, sow, rr, gg, bb);-
632-
633 r = r * (256 - xap);-
634 g = g * (256 - xap);-
635 b = b * (256 - xap);-
636 r = (r + (rr * xap)) >> 8;-
637 g = (g + (gg * xap)) >> 8;-
638 b = (b + (bb * xap)) >> 8;-
639 }-
640 *dptr++ = qRgb(r >> 14, g >> 14, b >> 14);-
641 }-
642 }-
643}-
644-
645static void qt_qimageScaleAARGB_down_x_up_y(QImageScaleInfo *isi, unsigned int *dest,-
646 int dw, int dh, int dow, int sow)-
647{-
648 const unsigned int **ypoints = isi->ypoints;-
649 int *xpoints = isi->xpoints;-
650 int *xapoints = isi->xapoints;-
651 int *yapoints = isi->yapoints;-
652-
653 /* go through every scanline in the output buffer */-
654 for (int y = 0; y < dh; y++) {-
655 unsigned int *dptr = dest + (y * dow);-
656 for (int x = 0; x < dw; x++) {-
657 int Cx = xapoints[x] >> 16;-
658 int xap = xapoints[x] & 0xffff;-
659-
660 const unsigned int *sptr = ypoints[y] + xpoints[x];-
661 int r, g, b;-
662 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, r, g, b);-
663-
664 int yap = yapoints[y];-
665 if (yap > 0) {-
666 int rr, bb, gg;-
667 qt_qimageScaleAARGB_helper(sptr + sow, xap, Cx, 1, rr, gg, bb);-
668-
669 r = r * (256 - yap);-
670 g = g * (256 - yap);-
671 b = b * (256 - yap);-
672 r = (r + (rr * yap)) >> 8;-
673 g = (g + (gg * yap)) >> 8;-
674 b = (b + (bb * yap)) >> 8;-
675 }-
676 *dptr++ = qRgb(r >> 14, g >> 14, b >> 14);-
677 }-
678 }-
679}-
680-
681static void qt_qimageScaleAARGB_down_xy(QImageScaleInfo *isi, unsigned int *dest,-
682 int dw, int dh, int dow, int sow)-
683{-
684 const unsigned int **ypoints = isi->ypoints;-
685 int *xpoints = isi->xpoints;-
686 int *xapoints = isi->xapoints;-
687 int *yapoints = isi->yapoints;-
688-
689 for (int y = 0; y < dh; y++) {-
690 int Cy = yapoints[y] >> 16;-
691 int yap = yapoints[y] & 0xffff;-
692-
693 unsigned int *dptr = dest + (y * dow);-
694 for (int x = 0; x < dw; x++) {-
695 int Cx = xapoints[x] >> 16;-
696 int xap = xapoints[x] & 0xffff;-
697-
698 const unsigned int *sptr = ypoints[y] + xpoints[x];-
699 int rx, gx, bx;-
700 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, rx, gx, bx);-
701-
702 int r = (rx >> 4) * yap;-
703 int g = (gx >> 4) * yap;-
704 int b = (bx >> 4) * yap;-
705-
706 int j;-
707 for (j = (1 << 14) - yap; j > Cy; j -= Cy) {-
708 sptr += sow;-
709 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, rx, gx, bx);-
710-
711 r += (rx >> 4) * Cy;-
712 g += (gx >> 4) * Cy;-
713 b += (bx >> 4) * Cy;-
714 }-
715 sptr += sow;-
716 qt_qimageScaleAARGB_helper(sptr, xap, Cx, 1, rx, gx, bx);-
717-
718 r += (rx >> 4) * j;-
719 g += (gx >> 4) * j;-
720 b += (bx >> 4) * j;-
721-
722 *dptr = qRgb(r >> 24, g >> 24, b >> 24);-
723 dptr++;-
724 }-
725 }-
726}-
727-
728QImage qSmoothScaleImage(const QImage &src, int dw, int dh)-
729{-
730 QImage buffer;-
731 if (src.isNull() || dw <= 0 || dh <= 0)-
732 return buffer;-
733-
734 int w = src.width();-
735 int h = src.height();-
736 QImageScaleInfo *scaleinfo =-
737 qimageCalcScaleInfo(src, w, h, dw, dh, true);-
738 if (!scaleinfo)-
739 return buffer;-
740-
741 buffer = QImage(dw, dh, src.format());-
742 if (buffer.isNull()) {-
743 qWarning("QImage: out of memory, returning null");-
744 qimageFreeScaleInfo(scaleinfo);-
745 return QImage();-
746 }-
747-
748 if (src.hasAlphaChannel())-
749 qt_qimageScaleAARGBA(scaleinfo, (unsigned int *)buffer.scanLine(0),-
750 dw, dh, dw, src.bytesPerLine() / 4);-
751 else-
752 qt_qimageScaleAARGB(scaleinfo, (unsigned int *)buffer.scanLine(0),-
753 dw, dh, dw, src.bytesPerLine() / 4);-
754-
755 qimageFreeScaleInfo(scaleinfo);-
756 return buffer;-
757}-
758-
759QT_END_NAMESPACE-
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