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 QtQuick 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
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://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 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
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
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include "qquickcontext2dtile_p.h"
41#if QT_CONFIG(opengl)
42# include <QOpenGLFramebufferObject>
43# include <QOpenGLFramebufferObjectFormat>
44# include <QOpenGLPaintDevice>
45#endif
46
47QT_BEGIN_NAMESPACE
48
49QQuickContext2DTile::QQuickContext2DTile()
50 : m_dirty(true)
51 , m_rect(QRect(0, 0, 1, 1))
52 , m_device(nullptr)
53{
54}
55
56QQuickContext2DTile::~QQuickContext2DTile()
57{
58 if (m_painter.isActive())
59 m_painter.end();
60}
61
62QPainter* QQuickContext2DTile::createPainter(bool smooth, bool antialiasing)
63{
64 if (m_painter.isActive())
65 m_painter.end();
66
67 aboutToDraw();
68 if (m_device) {
69 m_painter.begin(m_device);
70 m_painter.resetTransform();
71 m_painter.setCompositionMode(QPainter::CompositionMode_Source);
72
73#ifdef QQUICKCONTEXT2D_DEBUG
74 int v = 100;
75 int gray = (m_rect.x() / m_rect.width() + m_rect.y() / m_rect.height()) % 2;
76 if (gray)
77 v = 150;
78 m_painter.fillRect(QRect(0, 0, m_rect.width(), m_rect.height()), QColor(v, v, v, 255));
79#endif
80
81 if (antialiasing)
82 m_painter.setRenderHints(hints: QPainter::Antialiasing | QPainter::TextAntialiasing, on: true);
83 else
84 m_painter.setRenderHints(hints: QPainter::Antialiasing | QPainter::TextAntialiasing, on: false);
85
86 if (smooth)
87 m_painter.setRenderHint(hint: QPainter::SmoothPixmapTransform, on: true);
88 else
89 m_painter.setRenderHint(hint: QPainter::SmoothPixmapTransform, on: false);
90
91 m_painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
92 m_painter.translate(dx: -m_rect.left(), dy: -m_rect.top());
93 m_painter.setClipRect(m_rect);
94 m_painter.setClipping(false);
95 return &m_painter;
96 }
97
98 return nullptr;
99}
100#if QT_CONFIG(opengl)
101QQuickContext2DFBOTile::QQuickContext2DFBOTile()
102 : QQuickContext2DTile()
103 , m_fbo(nullptr)
104{
105}
106
107
108QQuickContext2DFBOTile::~QQuickContext2DFBOTile()
109{
110 if (m_fbo)
111 m_fbo->release();
112 delete m_fbo;
113}
114
115void QQuickContext2DFBOTile::aboutToDraw()
116{
117 m_fbo->bind();
118 if (!m_device) {
119 QOpenGLPaintDevice *gl_device = new QOpenGLPaintDevice(rect().size());
120 m_device = gl_device;
121 QPainter p(m_device);
122 p.fillRect(QRectF(0, 0, m_fbo->width(), m_fbo->height()), color: QColor(qRgba(r: 0, g: 0, b: 0, a: 0)));
123 p.end();
124 }
125}
126
127void QQuickContext2DFBOTile::drawFinished()
128{
129}
130
131void QQuickContext2DFBOTile::setRect(const QRect& r)
132{
133 if (m_rect == r)
134 return;
135 m_rect = r;
136 m_dirty = true;
137 if (!m_fbo || m_fbo->size() != r.size()) {
138 QOpenGLFramebufferObjectFormat format;
139 format.setAttachment(QOpenGLFramebufferObject::CombinedDepthStencil);
140 format.setInternalTextureFormat(GL_RGBA);
141 format.setMipmap(false);
142
143 if (m_painter.isActive())
144 m_painter.end();
145
146 delete m_fbo;
147 m_fbo = new QOpenGLFramebufferObject(r.size(), format);
148 }
149}
150#endif
151
152QQuickContext2DImageTile::QQuickContext2DImageTile()
153 : QQuickContext2DTile()
154{
155}
156
157QQuickContext2DImageTile::~QQuickContext2DImageTile()
158{
159}
160
161void QQuickContext2DImageTile::setRect(const QRect& r)
162{
163 if (m_rect == r)
164 return;
165 m_rect = r;
166 m_dirty = true;
167 if (m_image.size() != r.size()) {
168 m_image = QImage(r.size(), QImage::Format_ARGB32_Premultiplied);
169 }
170 m_device = &m_image;
171}
172
173QT_END_NAMESPACE
174
175

source code of qtdeclarative/src/quick/items/context2d/qquickcontext2dtile.cpp