1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "qwasmbackingstore.h"
#include "qwasmwindow.h"
#include "qwasmcompositor.h"
#include <QtOpenGL/qopengltexture.h>
#include <QtGui/qmatrix4x4.h>
#include <QtGui/qpainter.h>
#include <private/qguiapplication_p.h>
#include <qpa/qplatformscreen.h>
#include <QtGui/qoffscreensurface.h>
#include <QtGui/qbackingstore.h>
QT_BEGIN_NAMESPACE
QWasmBackingStore::QWasmBackingStore(QWasmCompositor *compositor, QWindow *window)
: QPlatformBackingStore(window)
, m_compositor(compositor)
, m_texture(new QOpenGLTexture(QOpenGLTexture::Target2D))
{
QWasmWindow *wasmWindow = static_cast<QWasmWindow *>(window->handle());
if (wasmWindow)
wasmWindow->setBackingStore(this);
}
QWasmBackingStore::~QWasmBackingStore()
{
auto window = this->window();
QWasmIntegration::get()->removeBackingStore(window);
destroy();
QWasmWindow *wasmWindow = static_cast<QWasmWindow *>(window->handle());
if (wasmWindow)
wasmWindow->setBackingStore(nullptr);
}
void QWasmBackingStore::destroy()
{
if (m_texture->isCreated()) {
auto context = m_compositor->context();
auto currentContext = QOpenGLContext::currentContext();
if (!currentContext || !QOpenGLContext::areSharing(context, currentContext)) {
QOffscreenSurface offScreenSurface(m_compositor->screen()->screen());
offScreenSurface.setFormat(context->format());
offScreenSurface.create();
context->makeCurrent(&offScreenSurface);
m_texture->destroy();
} else {
m_texture->destroy();
}
}
}
QPaintDevice *QWasmBackingStore::paintDevice()
{
return &m_image;
}
void QWasmBackingStore::flush(QWindow *window, const QRegion ®ion, const QPoint &offset)
{
Q_UNUSED(window);
Q_UNUSED(region);
Q_UNUSED(offset);
m_dirty |= region;
m_compositor->handleBackingStoreFlush();
}
void QWasmBackingStore::updateTexture()
{
if (m_dirty.isNull())
return;
if (m_recreateTexture) {
m_recreateTexture = false;
destroy();
}
if (!m_texture->isCreated()) {
m_texture->setMinificationFilter(QOpenGLTexture::Nearest);
m_texture->setMagnificationFilter(QOpenGLTexture::Nearest);
m_texture->setWrapMode(QOpenGLTexture::ClampToEdge);
m_texture->setData(m_image, QOpenGLTexture::DontGenerateMipMaps);
m_texture->create();
}
m_texture->bind();
QRegion fixed;
QRect imageRect = m_image.rect();
for (const QRect &rect : m_dirty) {
// Convert device-independent dirty region to device region
qreal dpr = m_image.devicePixelRatio();
QRect deviceRect = QRect(rect.topLeft() * dpr, rect.size() * dpr);
// intersect with image rect to be sure
QRect r = imageRect & deviceRect;
// if the rect is wide enough it is cheaper to just extend it instead of doing an image copy
if (r.width() >= imageRect.width() / 2) {
r.setX(0);
r.setWidth(imageRect.width());
}
fixed |= r;
}
for (const QRect &rect : fixed) {
// if the sub-rect is full-width we can pass the image data directly to
// OpenGL instead of copying, since there is no gap between scanlines
if (rect.width() == imageRect.width()) {
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, rect.y(), rect.width(), rect.height(), GL_RGBA, GL_UNSIGNED_BYTE,
m_image.constScanLine(rect.y()));
} else {
glTexSubImage2D(GL_TEXTURE_2D, 0, rect.x(), rect.y(), rect.width(), rect.height(), GL_RGBA, GL_UNSIGNED_BYTE,
m_image.copy(rect).constBits());
}
}
/* End of code taken from QEGLPlatformBackingStore */
m_dirty = QRegion();
}
void QWasmBackingStore::beginPaint(const QRegion ®ion)
{
m_dirty |= region;
// Keep backing store device pixel ratio in sync with window
if (m_image.devicePixelRatio() != window()->devicePixelRatio())
resize(backingStore()->size(), backingStore()->staticContents());
QPainter painter(&m_image);
if (m_image.hasAlphaChannel()) {
painter.setCompositionMode(QPainter::CompositionMode_Source);
const QColor blank = Qt::transparent;
for (const QRect &rect : region)
painter.fillRect(rect, blank);
}
}
void QWasmBackingStore::resize(const QSize &size, const QRegion &staticContents)
{
Q_UNUSED(staticContents);
QImage::Format format = window()->format().hasAlpha() ?
QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32;
m_image = QImage(size * window()->devicePixelRatio(), format);
m_image.setDevicePixelRatio(window()->devicePixelRatio());
m_recreateTexture = true;
}
QImage QWasmBackingStore::toImage() const
{
// used by QPlatformBackingStore::rhiFlush
return m_image;
}
const QImage &QWasmBackingStore::getImageRef() const
{
return m_image;
}
const QOpenGLTexture *QWasmBackingStore::getUpdatedTexture()
{
updateTexture();
return m_texture.data();
}
QT_END_NAMESPACE
|
