1 | // Copyright (C) 2016 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | |
5 | #include "qquickclipnode_p.h" |
6 | |
7 | #include <QtGui/qvector2d.h> |
8 | #include <QtCore/qmath.h> |
9 | |
10 | QT_BEGIN_NAMESPACE |
11 | |
12 | QQuickDefaultClipNode::QQuickDefaultClipNode(const QRectF &rect) |
13 | : m_rect(rect) |
14 | , m_radius(0) |
15 | , m_dirty_geometry(true) |
16 | , m_geometry(QSGGeometry::defaultAttributes_Point2D(), 0) |
17 | { |
18 | Q_UNUSED(m_reserved); |
19 | setGeometry(&m_geometry); |
20 | setIsRectangular(true); |
21 | } |
22 | |
23 | void QQuickDefaultClipNode::setRect(const QRectF &rect) |
24 | { |
25 | m_rect = rect; |
26 | m_dirty_geometry = true; |
27 | } |
28 | |
29 | void QQuickDefaultClipNode::setRadius(qreal radius) |
30 | { |
31 | m_radius = radius; |
32 | m_dirty_geometry = true; |
33 | setIsRectangular(radius == 0); |
34 | } |
35 | |
36 | void QQuickDefaultClipNode::update() |
37 | { |
38 | if (m_dirty_geometry) { |
39 | updateGeometry(); |
40 | m_dirty_geometry = false; |
41 | } |
42 | } |
43 | |
44 | void QQuickDefaultClipNode::updateGeometry() |
45 | { |
46 | QSGGeometry *g = geometry(); |
47 | |
48 | if (qFuzzyIsNull(d: m_radius)) { |
49 | g->allocate(vertexCount: 4); |
50 | QSGGeometry::updateRectGeometry(g, rect: m_rect); |
51 | |
52 | } else { |
53 | int vertexCount = 0; |
54 | |
55 | // Radius should never exceeds half of the width or half of the height |
56 | qreal radius = qMin(a: qMin(a: m_rect.width() / 2, b: m_rect.height() / 2), b: m_radius); |
57 | QRectF rect = m_rect; |
58 | rect.adjust(xp1: radius, yp1: radius, xp2: -radius, yp2: -radius); |
59 | |
60 | int segments = qMin(a: 30, b: qCeil(v: radius)); // Number of segments per corner. |
61 | |
62 | g->allocate(vertexCount: (segments + 1) * 4); |
63 | |
64 | QVector2D *vertices = (QVector2D *)g->vertexData(); |
65 | |
66 | for (int part = 0; part < 2; ++part) { |
67 | for (int i = 0; i <= segments; ++i) { |
68 | //### Should change to calculate sin/cos only once. |
69 | qreal angle = qreal(0.5 * M_PI) * (part + i / qreal(segments)); |
70 | qreal s = qFastSin(x: angle); |
71 | qreal c = qFastCos(x: angle); |
72 | qreal y = (part ? rect.bottom() : rect.top()) - radius * c; // current inner y-coordinate. |
73 | qreal lx = rect.left() - radius * s; // current inner left x-coordinate. |
74 | qreal rx = rect.right() + radius * s; // current inner right x-coordinate. |
75 | |
76 | vertices[vertexCount++] = QVector2D(rx, y); |
77 | vertices[vertexCount++] = QVector2D(lx, y); |
78 | } |
79 | } |
80 | |
81 | } |
82 | #ifdef QSG_RUNTIME_DESCRIPTION |
83 | #ifndef QT_NO_DEBUG_STREAM |
84 | QString desc; |
85 | { |
86 | QDebug dbg(&desc); |
87 | dbg << m_rect; |
88 | if (!qFuzzyIsNull(d: m_radius)) |
89 | dbg << "radius" << m_radius; |
90 | } |
91 | qsgnode_set_description(node: this, description: desc); |
92 | #endif |
93 | #endif |
94 | setClipRect(m_rect); |
95 | markDirty(bits: DirtyGeometry); |
96 | } |
97 | |
98 | QT_END_NAMESPACE |
99 | |