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39
40#include "qsgbasicinternalimagenode_p.h"
41
42#include <QtCore/qvarlengtharray.h>
43#include <QtCore/qmath.h>
44
45QT_BEGIN_NAMESPACE
46
47namespace
48{
49 struct SmoothVertex
50 {
51 float x, y, u, v;
52 float dx, dy, du, dv;
53 };
54
55 const QSGGeometry::AttributeSet &smoothAttributeSet()
56 {
57 static QSGGeometry::Attribute data[] = {
58 QSGGeometry::Attribute::createWithAttributeType(0, 2, QSGGeometry::FloatType, QSGGeometry::PositionAttribute),
59 QSGGeometry::Attribute::createWithAttributeType(1, 2, QSGGeometry::FloatType, QSGGeometry::TexCoordAttribute),
60 QSGGeometry::Attribute::createWithAttributeType(2, 2, QSGGeometry::FloatType, QSGGeometry::TexCoord1Attribute),
61 QSGGeometry::Attribute::createWithAttributeType(3, 2, QSGGeometry::FloatType, QSGGeometry::TexCoord2Attribute)
62 };
63 static QSGGeometry::AttributeSet attrs = { 4, sizeof(SmoothVertex), data };
64 return attrs;
65 }
66}
67
68QSGBasicInternalImageNode::QSGBasicInternalImageNode()
69 : m_innerSourceRect(0, 0, 1, 1)
70 , m_subSourceRect(0, 0, 1, 1)
71 , m_antialiasing(false)
72 , m_mirror(false)
73 , m_dirtyGeometry(false)
74 , m_geometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4)
75 , m_dynamicTexture(nullptr)
76{
77 setGeometry(&m_geometry);
78
79#ifdef QSG_RUNTIME_DESCRIPTION
80 qsgnode_set_description(this, QLatin1String("internalimage"));
81#endif
82}
83
84void QSGBasicInternalImageNode::setTargetRect(const QRectF &rect)
85{
86 if (rect == m_targetRect)
87 return;
88 m_targetRect = rect;
89 m_dirtyGeometry = true;
90}
91
92void QSGBasicInternalImageNode::setInnerTargetRect(const QRectF &rect)
93{
94 if (rect == m_innerTargetRect)
95 return;
96 m_innerTargetRect = rect;
97 m_dirtyGeometry = true;
98}
99
100void QSGBasicInternalImageNode::setInnerSourceRect(const QRectF &rect)
101{
102 if (rect == m_innerSourceRect)
103 return;
104 m_innerSourceRect = rect;
105 m_dirtyGeometry = true;
106}
107
108void QSGBasicInternalImageNode::setSubSourceRect(const QRectF &rect)
109{
110 if (rect == m_subSourceRect)
111 return;
112 m_subSourceRect = rect;
113 m_dirtyGeometry = true;
114}
115
116void QSGBasicInternalImageNode::setTexture(QSGTexture *texture)
117{
118 Q_ASSERT(texture);
119
120 setMaterialTexture(texture);
121 updateMaterialBlending();
122
123 markDirty(DirtyMaterial);
124
125 // Because the texture can be a different part of the atlas, we need to update it...
126 m_dirtyGeometry = true;
127}
128
129void QSGBasicInternalImageNode::setAntialiasing(bool antialiasing)
130{
131 if (antialiasing == m_antialiasing)
132 return;
133 m_antialiasing = antialiasing;
134 if (m_antialiasing) {
135 setGeometry(new QSGGeometry(smoothAttributeSet(), 0));
136 setFlag(OwnsGeometry, true);
137 } else {
138 setGeometry(&m_geometry);
139 setFlag(OwnsGeometry, false);
140 }
141 updateMaterialAntialiasing();
142 m_dirtyGeometry = true;
143}
144
145void QSGBasicInternalImageNode::setMirror(bool mirror)
146{
147 if (mirror == m_mirror)
148 return;
149 m_mirror = mirror;
150 m_dirtyGeometry = true;
151}
152
153
154void QSGBasicInternalImageNode::update()
155{
156 if (m_dirtyGeometry)
157 updateGeometry();
158}
159
160void QSGBasicInternalImageNode::preprocess()
161{
162 bool doDirty = false;
163 QSGDynamicTexture *t = qobject_cast<QSGDynamicTexture *>(materialTexture());
164 if (t) {
165 doDirty = t->updateTexture();
166 if (doDirty) {
167 // The geometry may need updating. This is expensive however, so do
168 // it only when something relevant has changed.
169 if (t != m_dynamicTexture
170 || t->textureSize() != m_dynamicTextureSize
171 || t->normalizedTextureSubRect() != m_dynamicTextureSubRect) {
172 updateGeometry();
173 m_dynamicTextureSize = t->textureSize();
174 m_dynamicTextureSubRect = t->normalizedTextureSubRect();
175 }
176 }
177 }
178 m_dynamicTexture = t;
179
180 if (updateMaterialBlending())
181 doDirty = true;
182
183 if (doDirty)
184 markDirty(DirtyMaterial);
185}
186
187namespace {
188 struct X { float x, tx; };
189 struct Y { float y, ty; };
190}
191
192static inline void appendQuad(int indexType, void **indexData,
193 int topLeft, int topRight,
194 int bottomLeft, int bottomRight)
195{
196 if (indexType == QSGGeometry::UnsignedIntType) {
197 quint32 *indices = static_cast<quint32 *>(*indexData);
198 *indices++ = topLeft;
199 *indices++ = bottomLeft;
200 *indices++ = bottomRight;
201 *indices++ = bottomRight;
202 *indices++ = topRight;
203 *indices++ = topLeft;
204 *indexData = indices;
205 } else {
206 Q_ASSERT(indexType == QSGGeometry::UnsignedShortType);
207 quint16 *indices = static_cast<quint16 *>(*indexData);
208 *indices++ = topLeft;
209 *indices++ = bottomLeft;
210 *indices++ = bottomRight;
211 *indices++ = bottomRight;
212 *indices++ = topRight;
213 *indices++ = topLeft;
214 *indexData = indices;
215 }
216}
217
218QSGGeometry *QSGBasicInternalImageNode::updateGeometry(const QRectF &targetRect,
219 const QRectF &innerTargetRect,
220 const QRectF &sourceRect,
221 const QRectF &innerSourceRect,
222 const QRectF &subSourceRect,
223 QSGGeometry *geometry,
224 bool mirror,
225 bool antialiasing)
226{
227 int floorLeft = qFloor(subSourceRect.left());
228 int ceilRight = qCeil(subSourceRect.right());
229 int floorTop = qFloor(subSourceRect.top());
230 int ceilBottom = qCeil(subSourceRect.bottom());
231 int hTiles = ceilRight - floorLeft;
232 int vTiles = ceilBottom - floorTop;
233
234 int hCells = hTiles;
235 int vCells = vTiles;
236 if (innerTargetRect.width() == 0)
237 hCells = 0;
238 if (innerTargetRect.left() != targetRect.left())
239 ++hCells;
240 if (innerTargetRect.right() != targetRect.right())
241 ++hCells;
242 if (innerTargetRect.height() == 0)
243 vCells = 0;
244 if (innerTargetRect.top() != targetRect.top())
245 ++vCells;
246 if (innerTargetRect.bottom() != targetRect.bottom())
247 ++vCells;
248
249 QVarLengthArray<X, 32> xData(2 * hCells);
250 QVarLengthArray<Y, 32> yData(2 * vCells);
251 X *xs = xData.data();
252 Y *ys = yData.data();
253
254 if (innerTargetRect.left() != targetRect.left()) {
255 xs[0].x = targetRect.left();
256 xs[0].tx = sourceRect.left();
257 xs[1].x = innerTargetRect.left();
258 xs[1].tx = innerSourceRect.left();
259 xs += 2;
260 }
261 if (innerTargetRect.width() != 0 && hTiles > 0) {
262 xs[0].x = innerTargetRect.left();
263 xs[0].tx = innerSourceRect.x() + (subSourceRect.left() - floorLeft) * innerSourceRect.width();
264 ++xs;
265 float b = innerTargetRect.width() / subSourceRect.width();
266 float a = innerTargetRect.x() - subSourceRect.x() * b;
267 for (int i = floorLeft + 1; i <= ceilRight - 1; ++i) {
268 xs[0].x = xs[1].x = a + b * i;
269 xs[0].tx = innerSourceRect.right();
270 xs[1].tx = innerSourceRect.left();
271 xs += 2;
272 }
273 xs[0].x = innerTargetRect.right();
274 xs[0].tx = innerSourceRect.x() + (subSourceRect.right() - ceilRight + 1) * innerSourceRect.width();
275 ++xs;
276 }
277 if (innerTargetRect.right() != targetRect.right()) {
278 xs[0].x = innerTargetRect.right();
279 xs[0].tx = innerSourceRect.right();
280 xs[1].x = targetRect.right();
281 xs[1].tx = sourceRect.right();
282 xs += 2;
283 }
284 Q_ASSERT(xs == xData.data() + xData.size());
285 if (mirror) {
286 float leftPlusRight = targetRect.left() + targetRect.right();
287 int count = xData.size();
288 xs = xData.data();
289 for (int i = 0; i < (count >> 1); ++i)
290 qSwap(xs[i], xs[count - 1 - i]);
291 for (int i = 0; i < count; ++i)
292 xs[i].x = leftPlusRight - xs[i].x;
293 }
294
295 if (innerTargetRect.top() != targetRect.top()) {
296 ys[0].y = targetRect.top();
297 ys[0].ty = sourceRect.top();
298 ys[1].y = innerTargetRect.top();
299 ys[1].ty = innerSourceRect.top();
300 ys += 2;
301 }
302 if (innerTargetRect.height() != 0 && vTiles > 0) {
303 ys[0].y = innerTargetRect.top();
304 ys[0].ty = innerSourceRect.y() + (subSourceRect.top() - floorTop) * innerSourceRect.height();
305 ++ys;
306 float b = innerTargetRect.height() / subSourceRect.height();
307 float a = innerTargetRect.y() - subSourceRect.y() * b;
308 for (int i = floorTop + 1; i <= ceilBottom - 1; ++i) {
309 ys[0].y = ys[1].y = a + b * i;
310 ys[0].ty = innerSourceRect.bottom();
311 ys[1].ty = innerSourceRect.top();
312 ys += 2;
313 }
314 ys[0].y = innerTargetRect.bottom();
315 ys[0].ty = innerSourceRect.y() + (subSourceRect.bottom() - ceilBottom + 1) * innerSourceRect.height();
316 ++ys;
317 }
318 if (innerTargetRect.bottom() != targetRect.bottom()) {
319 ys[0].y = innerTargetRect.bottom();
320 ys[0].ty = innerSourceRect.bottom();
321 ys[1].y = targetRect.bottom();
322 ys[1].ty = sourceRect.bottom();
323 ys += 2;
324 }
325 Q_ASSERT(ys == yData.data() + yData.size());
326
327 QSGGeometry::Type indexType = QSGGeometry::UnsignedShortType;
328 // We can handled up to 0xffff indices, but keep the limit lower here to
329 // merge better in the batch renderer.
330 if (hCells * vCells * 4 > 0x7fff)
331 indexType = QSGGeometry::UnsignedIntType;
332
333 if (antialiasing) {
334 if (!geometry || geometry->indexType() != indexType) {
335 geometry = new QSGGeometry(smoothAttributeSet(),
336 hCells * vCells * 4 + (hCells + vCells - 1) * 4,
337 hCells * vCells * 6 + (hCells + vCells) * 12,
338 indexType);
339 } else {
340 geometry->allocate(hCells * vCells * 4 + (hCells + vCells - 1) * 4,
341 hCells * vCells * 6 + (hCells + vCells) * 12);
342 }
343 QSGGeometry *g = geometry;
344 Q_ASSERT(g);
345
346 g->setDrawingMode(QSGGeometry::DrawTriangles);
347 SmoothVertex *vertices = reinterpret_cast<SmoothVertex *>(g->vertexData());
348 memset(vertices, 0, g->vertexCount() * g->sizeOfVertex());
349 void *indexData = g->indexData();
350
351 // The deltas are how much the fuzziness can reach into the image.
352 // Only the border vertices are moved by the vertex shader, so the fuzziness
353 // can't reach further into the image than the closest interior vertices.
354 float leftDx = xData.at(1).x - xData.at(0).x;
355 float rightDx = xData.at(xData.size() - 1).x - xData.at(xData.size() - 2).x;
356 float topDy = yData.at(1).y - yData.at(0).y;
357 float bottomDy = yData.at(yData.size() - 1).y - yData.at(yData.size() - 2).y;
358
359 float leftDu = xData.at(1).tx - xData.at(0).tx;
360 float rightDu = xData.at(xData.size() - 1).tx - xData.at(xData.size() - 2).tx;
361 float topDv = yData.at(1).ty - yData.at(0).ty;
362 float bottomDv = yData.at(yData.size() - 1).ty - yData.at(yData.size() - 2).ty;
363
364 if (hCells == 1) {
365 leftDx = rightDx *= 0.5f;
366 leftDu = rightDu *= 0.5f;
367 }
368 if (vCells == 1) {
369 topDy = bottomDy *= 0.5f;
370 topDv = bottomDv *= 0.5f;
371 }
372
373 // This delta is how much the fuzziness can reach out from the image.
374 float delta = float(qAbs(targetRect.width()) < qAbs(targetRect.height())
375 ? targetRect.width() : targetRect.height()) * 0.5f;
376
377 int index = 0;
378 ys = yData.data();
379 for (int j = 0; j < vCells; ++j, ys += 2) {
380 xs = xData.data();
381 bool isTop = j == 0;
382 bool isBottom = j == vCells - 1;
383 for (int i = 0; i < hCells; ++i, xs += 2) {
384 bool isLeft = i == 0;
385 bool isRight = i == hCells - 1;
386
387 SmoothVertex *v = vertices + index;
388
389 int topLeft = index;
390 for (int k = (isTop || isLeft ? 2 : 1); k--; ++v, ++index) {
391 v->x = xs[0].x;
392 v->u = xs[0].tx;
393 v->y = ys[0].y;
394 v->v = ys[0].ty;
395 }
396
397 int topRight = index;
398 for (int k = (isTop || isRight ? 2 : 1); k--; ++v, ++index) {
399 v->x = xs[1].x;
400 v->u = xs[1].tx;
401 v->y = ys[0].y;
402 v->v = ys[0].ty;
403 }
404
405 int bottomLeft = index;
406 for (int k = (isBottom || isLeft ? 2 : 1); k--; ++v, ++index) {
407 v->x = xs[0].x;
408 v->u = xs[0].tx;
409 v->y = ys[1].y;
410 v->v = ys[1].ty;
411 }
412
413 int bottomRight = index;
414 for (int k = (isBottom || isRight ? 2 : 1); k--; ++v, ++index) {
415 v->x = xs[1].x;
416 v->u = xs[1].tx;
417 v->y = ys[1].y;
418 v->v = ys[1].ty;
419 }
420
421 appendQuad(g->indexType(), &indexData, topLeft, topRight, bottomLeft, bottomRight);
422
423 if (isTop) {
424 vertices[topLeft].dy = vertices[topRight].dy = topDy;
425 vertices[topLeft].dv = vertices[topRight].dv = topDv;
426 vertices[topLeft + 1].dy = vertices[topRight + 1].dy = -delta;
427 appendQuad(g->indexType(), &indexData, topLeft + 1, topRight + 1, topLeft, topRight);
428 }
429
430 if (isBottom) {
431 vertices[bottomLeft].dy = vertices[bottomRight].dy = -bottomDy;
432 vertices[bottomLeft].dv = vertices[bottomRight].dv = -bottomDv;
433 vertices[bottomLeft + 1].dy = vertices[bottomRight + 1].dy = delta;
434 appendQuad(g->indexType(), &indexData, bottomLeft, bottomRight, bottomLeft + 1, bottomRight + 1);
435 }
436
437 if (isLeft) {
438 vertices[topLeft].dx = vertices[bottomLeft].dx = leftDx;
439 vertices[topLeft].du = vertices[bottomLeft].du = leftDu;
440 vertices[topLeft + 1].dx = vertices[bottomLeft + 1].dx = -delta;
441 appendQuad(g->indexType(), &indexData, topLeft + 1, topLeft, bottomLeft + 1, bottomLeft);
442 }
443
444 if (isRight) {
445 vertices[topRight].dx = vertices[bottomRight].dx = -rightDx;
446 vertices[topRight].du = vertices[bottomRight].du = -rightDu;
447 vertices[topRight + 1].dx = vertices[bottomRight + 1].dx = delta;
448 appendQuad(g->indexType(), &indexData, topRight, topRight + 1, bottomRight, bottomRight + 1);
449 }
450 }
451 }
452
453 Q_ASSERT(index == g->vertexCount());
454 } else {
455 if (!geometry || geometry->indexType() != indexType) {
456 geometry = new QSGGeometry(QSGGeometry::defaultAttributes_TexturedPoint2D(),
457 hCells * vCells * 4, hCells * vCells * 6,
458 indexType);
459 } else {
460 geometry->allocate(hCells * vCells * 4, hCells * vCells * 6);
461 }
462 geometry->setDrawingMode(QSGGeometry::DrawTriangles);
463 QSGGeometry::TexturedPoint2D *vertices = geometry->vertexDataAsTexturedPoint2D();
464 ys = yData.data();
465 for (int j = 0; j < vCells; ++j, ys += 2) {
466 xs = xData.data();
467 for (int i = 0; i < hCells; ++i, xs += 2) {
468 vertices[0].x = vertices[2].x = xs[0].x;
469 vertices[0].tx = vertices[2].tx = xs[0].tx;
470 vertices[1].x = vertices[3].x = xs[1].x;
471 vertices[1].tx = vertices[3].tx = xs[1].tx;
472
473 vertices[0].y = vertices[1].y = ys[0].y;
474 vertices[0].ty = vertices[1].ty = ys[0].ty;
475 vertices[2].y = vertices[3].y = ys[1].y;
476 vertices[2].ty = vertices[3].ty = ys[1].ty;
477
478 vertices += 4;
479 }
480 }
481 void *indexData = geometry->indexData();
482 for (int i = 0; i < 4 * vCells * hCells; i += 4)
483 appendQuad(geometry->indexType(), &indexData, i, i + 1, i + 2, i + 3);
484 }
485 return geometry;
486}
487
488void QSGBasicInternalImageNode::updateGeometry()
489{
490 Q_ASSERT(!m_targetRect.isEmpty());
491 const QSGTexture *t = materialTexture();
492 if (!t) {
493 QSGGeometry *g = geometry();
494 g->allocate(4);
495 g->setDrawingMode(QSGGeometry::DrawTriangleStrip);
496 memset(g->vertexData(), 0, g->sizeOfVertex() * 4);
497 } else {
498 QRectF sourceRect = t->normalizedTextureSubRect();
499
500 QRectF innerSourceRect(sourceRect.x() + m_innerSourceRect.x() * sourceRect.width(),
501 sourceRect.y() + m_innerSourceRect.y() * sourceRect.height(),
502 m_innerSourceRect.width() * sourceRect.width(),
503 m_innerSourceRect.height() * sourceRect.height());
504
505 bool hasMargins = m_targetRect != m_innerTargetRect;
506
507 int floorLeft = qFloor(m_subSourceRect.left());
508 int ceilRight = qCeil(m_subSourceRect.right());
509 int floorTop = qFloor(m_subSourceRect.top());
510 int ceilBottom = qCeil(m_subSourceRect.bottom());
511 int hTiles = ceilRight - floorLeft;
512 int vTiles = ceilBottom - floorTop;
513
514 bool hasTiles = hTiles > 1 || vTiles > 1;
515 bool fullTexture = innerSourceRect == QRectF(0, 0, 1, 1);
516
517 // An image can be rendered as a single quad if:
518 // - There are no margins, and either:
519 // - the image isn't repeated
520 // - the source rectangle fills the entire texture so that texture wrapping can be used,
521 // and NPOT is supported
522 if (!hasMargins && (!hasTiles || (fullTexture && supportsWrap(t->textureSize())))) {
523 QRectF sr;
524 if (!fullTexture) {
525 sr = QRectF(innerSourceRect.x() + (m_subSourceRect.left() - floorLeft) * innerSourceRect.width(),
526 innerSourceRect.y() + (m_subSourceRect.top() - floorTop) * innerSourceRect.height(),
527 m_subSourceRect.width() * innerSourceRect.width(),
528 m_subSourceRect.height() * innerSourceRect.height());
529 } else {
530 sr = QRectF(m_subSourceRect.left() - floorLeft, m_subSourceRect.top() - floorTop,
531 m_subSourceRect.width(), m_subSourceRect.height());
532 }
533 if (m_mirror) {
534 qreal oldLeft = sr.left();
535 sr.setLeft(sr.right());
536 sr.setRight(oldLeft);
537 }
538
539 if (m_antialiasing) {
540 QSGGeometry *g = geometry();
541 Q_ASSERT(g != &m_geometry);
542 if (g->indexType() != QSGGeometry::UnsignedShortType) {
543 setGeometry(new QSGGeometry(smoothAttributeSet(), 0));
544 g = geometry();
545 }
546 g->allocate(8, 14);
547 g->setDrawingMode(QSGGeometry::DrawTriangleStrip);
548 SmoothVertex *vertices = reinterpret_cast<SmoothVertex *>(g->vertexData());
549 float delta = float(qAbs(m_targetRect.width()) < qAbs(m_targetRect.height())
550 ? m_targetRect.width() : m_targetRect.height()) * 0.5f;
551 float sx = float(sr.width() / m_targetRect.width());
552 float sy = float(sr.height() / m_targetRect.height());
553 for (int d = -1; d <= 1; d += 2) {
554 for (int j = 0; j < 2; ++j) {
555 for (int i = 0; i < 2; ++i, ++vertices) {
556 vertices->x = m_targetRect.x() + i * m_targetRect.width();
557 vertices->y = m_targetRect.y() + j * m_targetRect.height();
558 vertices->u = sr.x() + i * sr.width();
559 vertices->v = sr.y() + j * sr.height();
560 vertices->dx = (i == 0 ? delta : -delta) * d;
561 vertices->dy = (j == 0 ? delta : -delta) * d;
562 vertices->du = (d < 0 ? 0 : vertices->dx * sx);
563 vertices->dv = (d < 0 ? 0 : vertices->dy * sy);
564 }
565 }
566 }
567 Q_ASSERT(vertices - g->vertexCount() == g->vertexData());
568 static const quint16 indices[] = {
569 0, 4, 1, 5, 3, 7, 2, 6, 0, 4,
570 4, 6, 5, 7
571 };
572 Q_ASSERT(g->sizeOfIndex() * g->indexCount() == sizeof(indices));
573 memcpy(g->indexDataAsUShort(), indices, sizeof(indices));
574 } else {
575 m_geometry.allocate(4);
576 m_geometry.setDrawingMode(QSGGeometry::DrawTriangleStrip);
577 QSGGeometry::updateTexturedRectGeometry(&m_geometry, m_targetRect, sr);
578 }
579 } else {
580 QSGGeometry *g = geometry();
581 g = updateGeometry(m_targetRect, m_innerTargetRect,
582 sourceRect, innerSourceRect, m_subSourceRect,
583 g, m_mirror, m_antialiasing);
584 if (g != geometry()) {
585 setGeometry(g);
586 setFlag(OwnsGeometry, true);
587 }
588 }
589 }
590 markDirty(DirtyGeometry);
591 m_dirtyGeometry = false;
592}
593
594QT_END_NAMESPACE
595