qpaintengine_pic.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
5**-
6** This file is part of the QtGui module of the Qt Toolkit.-
7**-
8** $QT_BEGIN_LICENSE:LGPL$-
9** Commercial License Usage-
10** Licensees holding valid commercial Qt licenses may use this file in-
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22** ensure the GNU Lesser General Public License version 3 requirements-
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24**-
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26** Alternatively, this file may be used under the terms of the GNU-
27** General Public License version 2.0 or (at your option) the GNU General-
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36** $QT_END_LICENSE$-
37**-
38****************************************************************************/-
39-
40#include "private/qpaintengine_p.h"-
41#include "private/qpainter_p.h"-
42#include "private/qpicture_p.h"-
43#include "private/qfont_p.h"-
44-
45#ifndef QT_NO_PICTURE-
46-
47#include "qbuffer.h"-
48#include "qbytearray.h"-
49#include "qdatastream.h"-
50#include "qmath.h"-
51#include "qpaintengine_pic_p.h"-
52#include "qpicture.h"-
53#include "qpolygon.h"-
54#include "qrect.h"-
55#include <private/qtextengine_p.h>-
56-
57//#define QT_PICTURE_DEBUG-
58#include <qdebug.h>-
59-
60-
61QT_BEGIN_NAMESPACE-
62-
63class QPicturePaintEnginePrivate : public QPaintEnginePrivate-
64{-
65 Q_DECLARE_PUBLIC(QPicturePaintEngine)-
66public:-
67 QDataStream s;-
68 QPainter *pt;-
69 QPicturePrivate *pic_d;-
70};-
71-
72QPicturePaintEngine::QPicturePaintEngine()-
73 : QPaintEngine(*(new QPicturePaintEnginePrivate), AllFeatures)-
74{-
75 Q_D(QPicturePaintEngine);-
76 d->pt = 0;-
77}-
78-
79QPicturePaintEngine::QPicturePaintEngine(QPaintEnginePrivate &dptr)-
80 : QPaintEngine(dptr, AllFeatures)-
81{-
82 Q_D(QPicturePaintEngine);-
83 d->pt = 0;-
84}-
85-
86QPicturePaintEngine::~QPicturePaintEngine()-
87{-
88}-
89-
90bool QPicturePaintEngine::begin(QPaintDevice *pd)-
91{-
92 Q_D(QPicturePaintEngine);-
93#ifdef QT_PICTURE_DEBUG-
94 qDebug() << ("QPicturePaintEngine::begin()";);-
95#endif-
96 Q_ASSERT(pd);-
97 QPicture *pic = static_cast<QPicture *>(pd);-
98-
99 d->pdev = pd;-
100 d->pic_d = pic->d_func();-
101 Q_ASSERT(d->pic_d);-
102-
103 d->s.setDevice(&d->pic_d->pictb);-
104 d->s.setVersion(d->pic_d->formatMajor);-
105-
106 d->pic_d->pictb.open(QIODevice::WriteOnly | QIODevice::Truncate);-
107 d->s.writeRawData(qt_mfhdr_tag, 4);-
108 d->s << (quint16) 0 << (quint16) d->pic_d->formatMajor << (quint16) d->pic_d->formatMinor;-
109 d->s << (quint8) QPicturePrivate::PdcBegin << (quint8) sizeof(qint32);-
110 d->pic_d->brect = QRect();-
111 if (d->pic_d->formatMajor >= 4) {
d->pic_d->formatMajor >= 4Description
TRUEnever evaluated
FALSEnever evaluated
0
112 QRect r = pic->boundingRect();-
113 d->s << (qint32) r.left() << (qint32) r.top() << (qint32) r.width()-
114 << (qint32) r.height();-
115 }
never executed: end of block
0
116 d->pic_d->trecs = 0;-
117 d->s << (quint32)d->pic_d->trecs; // total number of records-
118 d->pic_d->formatOk = false;-
119 setActive(true);-
120 return true;
never executed: return true;
0
121}-
122-
123bool QPicturePaintEngine::end()-
124{-
125 Q_D(QPicturePaintEngine);-
126#ifdef QT_PICTURE_DEBUG-
127 qDebug() << ("QPicturePaintEngine::end()";);-
128#endif-
129 d->pic_d->trecs++;-
130 d->s << (quint8) QPicturePrivate::PdcEnd << (quint8) 0;-
131 int cs_start = sizeof(quint32); // pos of checksum word-
132 int data_start = cs_start + sizeof(quint16);-
133 int brect_start = data_start + 2*sizeof(qint16) + 2*sizeof(quint8);-
134 int pos = d->pic_d->pictb.pos();-
135 d->pic_d->pictb.seek(brect_start);-
136 if (d->pic_d->formatMajor >= 4) { // bounding rectangle
d->pic_d->formatMajor >= 4Description
TRUEnever evaluated
FALSEnever evaluated
0
137 QRect r = static_cast<QPicture *>(d->pdev)->boundingRect();-
138 d->s << (qint32) r.left() << (qint32) r.top() << (qint32) r.width()-
139 << (qint32) r.height();-
140 }
never executed: end of block
0
141 d->s << (quint32) d->pic_d->trecs; // write number of records-
142 d->pic_d->pictb.seek(cs_start);-
143 QByteArray buf = d->pic_d->pictb.buffer();-
144 quint16 cs = (quint16) qChecksum(buf.constData() + data_start, pos - data_start);-
145 d->s << cs; // write checksum-
146 d->pic_d->pictb.close();-
147 setActive(false);-
148 return true;
never executed: return true;
0
149}-
150-
151#define SERIALIZE_CMD(c) \-
152 d->pic_d->trecs++; \-
153 d->s << (quint8) c; \-
154 d->s << (quint8) 0; \-
155 pos = d->pic_d->pictb.pos()-
156-
157void QPicturePaintEngine::updatePen(const QPen &pen)-
158{-
159 Q_D(QPicturePaintEngine);-
160#ifdef QT_PICTURE_DEBUG-
161 qDebug() << " -> updatePen(): width:" << pen.width() << "style:"-
162 << pen.style() << "color:" << pen.color();-
163#endif-
164 int pos;-
165 SERIALIZE_CMD(QPicturePrivate::PdcSetPen);-
166 if (d->pic_d->in_memory_only) {-
167 int index = d->pic_d->pen_list.size();-
168 d->pic_d->pen_list.append(pen);-
169 d->s << index;-
170 } else {-
171 d->s << pen;-
172 }-
173 writeCmdLength(pos, QRect(), false);-
174}-
175-
176void QPicturePaintEngine::updateCompositionMode(QPainter::CompositionMode cmode)-
177{-
178 Q_D(QPicturePaintEngine);-
179#ifdef QT_PICTURE_DEBUG-
180 qDebug() << " -> updateCompositionMode():" << cmode;-
181#endif-
182 int pos;-
183 SERIALIZE_CMD(QPicturePrivate::PdcSetCompositionMode);-
184 d->s << (qint32)cmode;-
185 writeCmdLength(pos, QRectF(), false);-
186}-
187-
188void QPicturePaintEngine::updateClipEnabled(bool enabled)-
189{-
190 Q_D(QPicturePaintEngine);-
191#ifdef QT_PICTURE_DEBUG-
192 qDebug() << " -> updateClipEnabled():" << enabled;-
193#endif-
194 int pos;-
195 SERIALIZE_CMD(QPicturePrivate::PdcSetClipEnabled);-
196 d->s << enabled;-
197 writeCmdLength(pos, QRectF(), false);-
198}-
199-
200void QPicturePaintEngine::updateOpacity(qreal opacity)-
201{-
202 Q_D(QPicturePaintEngine);-
203#ifdef QT_PICTURE_DEBUG-
204 qDebug() << " -> updateOpacity():" << opacity;-
205#endif-
206 int pos;-
207 SERIALIZE_CMD(QPicturePrivate::PdcSetOpacity);-
208 d->s << double(opacity);-
209 writeCmdLength(pos, QRectF(), false);-
210}-
211-
212void QPicturePaintEngine::updateBrush(const QBrush &brush)-
213{-
214 Q_D(QPicturePaintEngine);-
215#ifdef QT_PICTURE_DEBUG-
216 qDebug() << " -> updateBrush(): style:" << brush.style();-
217#endif-
218 int pos;-
219 SERIALIZE_CMD(QPicturePrivate::PdcSetBrush);-
220 if (d->pic_d->in_memory_only) {-
221 int index = d->pic_d->brush_list.size();-
222 d->pic_d->brush_list.append(brush);-
223 d->s << index;-
224 } else {-
225 d->s << brush;-
226 }-
227 writeCmdLength(pos, QRect(), false);-
228}-
229-
230void QPicturePaintEngine::updateBrushOrigin(const QPointF &p)-
231{-
232 Q_D(QPicturePaintEngine);-
233#ifdef QT_PICTURE_DEBUG-
234 qDebug() << " -> updateBrushOrigin(): " << p;-
235#endif-
236 int pos;-
237 SERIALIZE_CMD(QPicturePrivate::PdcSetBrushOrigin);-
238 d->s << p;-
239 writeCmdLength(pos, QRect(), false);-
240}-
241-
242void QPicturePaintEngine::updateFont(const QFont &font)-
243{-
244 Q_D(QPicturePaintEngine);-
245#ifdef QT_PICTURE_DEBUG-
246 qDebug() << " -> updateFont(): pt sz:" << font.pointSize();-
247#endif-
248 int pos;-
249 SERIALIZE_CMD(QPicturePrivate::PdcSetFont);-
250 QFont fnt = font;-
251 d->s << fnt;-
252 writeCmdLength(pos, QRectF(), false);-
253}-
254-
255void QPicturePaintEngine::updateBackground(Qt::BGMode bgMode, const QBrush &bgBrush)-
256{-
257 Q_D(QPicturePaintEngine);-
258#ifdef QT_PICTURE_DEBUG-
259 qDebug() << " -> updateBackground(): mode:" << bgMode << "style:" << bgBrush.style();-
260#endif-
261 int pos;-
262 SERIALIZE_CMD(QPicturePrivate::PdcSetBkColor);-
263 d->s << bgBrush.color();-
264 writeCmdLength(pos, QRect(), false);-
265-
266 SERIALIZE_CMD(QPicturePrivate::PdcSetBkMode);-
267 d->s << (qint8) bgMode;-
268 writeCmdLength(pos, QRectF(), false);-
269}-
270-
271void QPicturePaintEngine::updateMatrix(const QTransform &matrix)-
272{-
273 Q_D(QPicturePaintEngine);-
274#ifdef QT_PICTURE_DEBUG-
275 qDebug() << " -> updateMatrix():" << matrix;-
276#endif-
277 int pos;-
278 SERIALIZE_CMD(QPicturePrivate::PdcSetWMatrix);-
279 d->s << matrix << (qint8) false;-
280 writeCmdLength(pos, QRectF(), false);-
281}-
282-
283void QPicturePaintEngine::updateClipRegion(const QRegion &region, Qt::ClipOperation op)-
284{-
285 Q_D(QPicturePaintEngine);-
286#ifdef QT_PICTURE_DEBUG-
287 qDebug() << " -> updateClipRegion(): op:" << op-
288 << "bounding rect:" << region.boundingRect();-
289#endif-
290 int pos;-
291 SERIALIZE_CMD(QPicturePrivate::PdcSetClipRegion);-
292 d->s << region << qint8(op);-
293 writeCmdLength(pos, QRectF(), false);-
294}-
295-
296void QPicturePaintEngine::updateClipPath(const QPainterPath &path, Qt::ClipOperation op)-
297{-
298 Q_D(QPicturePaintEngine);-
299#ifdef QT_PICTURE_DEBUG-
300 qDebug() << " -> updateClipPath(): op:" << op-
301 << "bounding rect:" << path.boundingRect();-
302#endif-
303 int pos;-
304-
305 SERIALIZE_CMD(QPicturePrivate::PdcSetClipPath);-
306 d->s << path << qint8(op);-
307 writeCmdLength(pos, QRectF(), false);-
308}-
309-
310void QPicturePaintEngine::updateRenderHints(QPainter::RenderHints hints)-
311{-
312 Q_D(QPicturePaintEngine);-
313#ifdef QT_PICTURE_DEBUG-
314 qDebug() << " -> updateRenderHints(): " << hints;-
315#endif-
316 int pos;-
317 SERIALIZE_CMD(QPicturePrivate::PdcSetRenderHint);-
318 d->s << (quint32) hints;-
319 writeCmdLength(pos, QRect(), false);-
320}-
321-
322void QPicturePaintEngine::writeCmdLength(int pos, const QRectF &r, bool corr)-
323{-
324 Q_D(QPicturePaintEngine);-
325 int newpos = d->pic_d->pictb.pos(); // new position-
326 int length = newpos - pos;-
327 QRectF br(r);-
328-
329 if (length < 255) { // write 8-bit length-
330 d->pic_d->pictb.seek(pos - 1); // position to right index-
331 d->s << (quint8)length;-
332 } else { // write 32-bit length-
333 d->s << (quint32)0; // extend the buffer-
334 d->pic_d->pictb.seek(pos - 1); // position to right index-
335 d->s << (quint8)255; // indicate 32-bit length-
336 char *p = d->pic_d->pictb.buffer().data();-
337 memmove(p+pos+4, p+pos, length); // make room for 4 byte-
338 d->s << (quint32)length;-
339 newpos += 4;-
340 }-
341 d->pic_d->pictb.seek(newpos); // set to new position-
342-
343 if (br.width() > 0.0 || br.height() > 0.0) {-
344 if (corr) { // widen bounding rect-
345 int w2 = painter()->pen().width() / 2;-
346 br.setCoords(br.left() - w2, br.top() - w2,-
347 br.right() + w2, br.bottom() + w2);-
348 }-
349 br = painter()->transform().mapRect(br);-
350 if (painter()->hasClipping()) {-
351 QRectF cr = painter()->clipBoundingRect();-
352 br &= cr;-
353 }-
354-
355 if (br.width() > 0.0 || br.height() > 0.0) {-
356 int minx = qFloor(br.left());-
357 int miny = qFloor(br.top());-
358 int maxx = qCeil(br.right());-
359 int maxy = qCeil(br.bottom());-
360-
361 if (d->pic_d->brect.width() > 0 || d->pic_d->brect.height() > 0) {-
362 minx = qMin(minx, d->pic_d->brect.left());-
363 miny = qMin(miny, d->pic_d->brect.top());-
364 maxx = qMax(maxx, d->pic_d->brect.x() + d->pic_d->brect.width());-
365 maxy = qMax(maxy, d->pic_d->brect.y() + d->pic_d->brect.height());-
366 d->pic_d->brect = QRect(minx, miny, maxx - minx, maxy - miny);-
367 } else {-
368 d->pic_d->brect = QRect(minx, miny, maxx - minx, maxy - miny);-
369 }-
370 }-
371 }-
372}-
373-
374void QPicturePaintEngine::drawEllipse(const QRectF &rect)-
375{-
376 Q_D(QPicturePaintEngine);-
377#ifdef QT_PICTURE_DEBUG-
378 qDebug() << " -> drawEllipse():" << rect;-
379#endif-
380 int pos;-
381 SERIALIZE_CMD(QPicturePrivate::PdcDrawEllipse);-
382 d->s << rect;-
383 writeCmdLength(pos, rect, true);-
384}-
385-
386void QPicturePaintEngine::drawPath(const QPainterPath &path)-
387{-
388 Q_D(QPicturePaintEngine);-
389#ifdef QT_PICTURE_DEBUG-
390 qDebug() << " -> drawPath():" << path.boundingRect();-
391#endif-
392 int pos;-
393 SERIALIZE_CMD(QPicturePrivate::PdcDrawPath);-
394 d->s << path;-
395 writeCmdLength(pos, path.boundingRect(), true);-
396}-
397-
398void QPicturePaintEngine::drawPolygon(const QPointF *points, int numPoints, PolygonDrawMode mode)-
399{-
400 Q_D(QPicturePaintEngine);-
401#ifdef QT_PICTURE_DEBUG-
402 qDebug() << " -> drawPolygon(): size=" << numPoints;-
403#endif-
404 int pos;-
405-
406 QPolygonF polygon;-
407 polygon.reserve(numPoints);-
408 for (int i=0; i<numPoints; ++i)-
409 polygon << points[i];-
410-
411 if (mode == PolylineMode) {-
412 SERIALIZE_CMD(QPicturePrivate::PdcDrawPolyline);-
413 d->s << polygon;-
414 } else {-
415 SERIALIZE_CMD(QPicturePrivate::PdcDrawPolygon);-
416 d->s << polygon;-
417 d->s << (qint8)(mode == OddEvenMode ? 0 : 1);-
418 }-
419-
420 writeCmdLength(pos, polygon.boundingRect(), true);-
421}-
422-
423void QPicturePaintEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)-
424{-
425 Q_D(QPicturePaintEngine);-
426#ifdef QT_PICTURE_DEBUG-
427 qDebug() << " -> drawPixmap():" << r;-
428#endif-
429 int pos;-
430 SERIALIZE_CMD(QPicturePrivate::PdcDrawPixmap);-
431-
432 if (d->pic_d->in_memory_only) {-
433 int index = d->pic_d->pixmap_list.size();-
434 d->pic_d->pixmap_list.append(pm);-
435 d->s << r << index << sr;-
436 } else {-
437 d->s << r << pm << sr;-
438 }-
439 writeCmdLength(pos, r, false);-
440}-
441-
442void QPicturePaintEngine::drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s)-
443{-
444 Q_D(QPicturePaintEngine);-
445#ifdef QT_PICTURE_DEBUG-
446 qDebug() << " -> drawTiledPixmap():" << r << s;-
447#endif-
448 int pos;-
449 SERIALIZE_CMD(QPicturePrivate::PdcDrawTiledPixmap);-
450 if (d->pic_d->in_memory_only) {-
451 int index = d->pic_d->pixmap_list.size();-
452 d->pic_d->pixmap_list.append(pixmap);-
453 d->s << r << index << s;-
454 } else {-
455 d->s << r << pixmap << s;-
456 }-
457 writeCmdLength(pos, r, false);-
458}-
459-
460void QPicturePaintEngine::drawImage(const QRectF &r, const QImage &image, const QRectF &sr,-
461 Qt::ImageConversionFlags flags)-
462{-
463 Q_D(QPicturePaintEngine);-
464#ifdef QT_PICTURE_DEBUG-
465 qDebug() << " -> drawImage():" << r << sr;-
466#endif-
467 int pos;-
468 SERIALIZE_CMD(QPicturePrivate::PdcDrawImage);-
469 if (d->pic_d->in_memory_only) {-
470 int index = d->pic_d->image_list.size();-
471 d->pic_d->image_list.append(image);-
472 d->s << r << index << sr << (quint32) flags;-
473 } else {-
474 d->s << r << image << sr << (quint32) flags;-
475 }-
476 writeCmdLength(pos, r, false);-
477}-
478-
479void QPicturePaintEngine::drawTextItem(const QPointF &p , const QTextItem &ti)-
480{-
481 Q_D(QPicturePaintEngine);-
482#ifdef QT_PICTURE_DEBUG-
483 qDebug() << " -> drawTextItem():" << p << ti.text();-
484#endif-
485-
486 const QTextItemInt &si = static_cast<const QTextItemInt &>(ti);-
487 if (si.chars == 0)-
488 QPaintEngine::drawTextItem(p, ti); // Draw as path-
489-
490 if (d->pic_d->formatMajor >= 9) {-
491 int pos;-
492 SERIALIZE_CMD(QPicturePrivate::PdcDrawTextItem);-
493 QFont fnt = ti.font();-
494 fnt.setUnderline(false);-
495 fnt.setStrikeOut(false);-
496 fnt.setOverline(false);-
497-
498 qreal justificationWidth = 0;-
499 if (si.justified)-
500 justificationWidth = si.width.toReal();-
501-
502 d->s << p << ti.text() << fnt << ti.renderFlags() << double(fnt.d->dpi)/qt_defaultDpi() << justificationWidth;-
503 writeCmdLength(pos, /*brect=*/QRectF(), /*corr=*/false);-
504 } else if (d->pic_d->formatMajor >= 8) {-
505 // old old (buggy) format-
506 int pos;-
507 SERIALIZE_CMD(QPicturePrivate::PdcDrawTextItem);-
508 d->s << QPointF(p.x(), p.y() - ti.ascent()) << ti.text() << ti.font() << ti.renderFlags();-
509 writeCmdLength(pos, /*brect=*/QRectF(), /*corr=*/false);-
510 } else {-
511 // old (buggy) format-
512 int pos;-
513 SERIALIZE_CMD(QPicturePrivate::PdcDrawText2);-
514 d->s << p << ti.text();-
515 writeCmdLength(pos, QRectF(p, QSizeF(1,1)), true);-
516 }-
517}-
518-
519void QPicturePaintEngine::updateState(const QPaintEngineState &state)-
520{-
521 QPaintEngine::DirtyFlags flags = state.state();-
522 if (flags & DirtyPen) updatePen(state.pen());-
523 if (flags & DirtyBrush) updateBrush(state.brush());-
524 if (flags & DirtyBrushOrigin) updateBrushOrigin(state.brushOrigin());-
525 if (flags & DirtyFont) updateFont(state.font());-
526 if (flags & DirtyBackground) updateBackground(state.backgroundMode(), state.backgroundBrush());-
527 if (flags & DirtyTransform) updateMatrix(state.transform());-
528 if (flags & DirtyClipEnabled) updateClipEnabled(state.isClipEnabled());-
529 if (flags & DirtyClipRegion) updateClipRegion(state.clipRegion(), state.clipOperation());-
530 if (flags & DirtyClipPath) updateClipPath(state.clipPath(), state.clipOperation());-
531 if (flags & DirtyHints) updateRenderHints(state.renderHints());-
532 if (flags & DirtyCompositionMode) updateCompositionMode(state.compositionMode());-
533 if (flags & DirtyOpacity) updateOpacity(state.opacity());-
534}-
535-
536QT_END_NAMESPACE-
537-
538#endif // QT_NO_PICTURE-
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