summaryrefslogtreecommitdiffstats
path: root/src/datavisualizationqml2/abstractdeclarative.cpp
blob: 65e7c6c334c981328052e674eeca6d169b947eba (plain)
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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/

#include "abstractdeclarative_p.h"
#include "qvalue3daxis.h"
#include "declarativetheme_p.h"
#include "declarativerendernode_p.h"

#include <QtGui/QGuiApplication>
#if defined(Q_OS_IOS)
#include <QtCore/QTimer>
#endif

QT_BEGIN_NAMESPACE_DATAVISUALIZATION

static QList<const QQuickWindow *> clearList;
static QHash<AbstractDeclarative *, QQuickWindow *> graphWindowList;
static QHash<QQuickWindow *, bool> windowClearList;

AbstractDeclarative::AbstractDeclarative(QQuickItem *parent) :
    QQuickItem(parent),
    m_controller(0),
    m_contextWindow(0),
    m_renderMode(RenderIndirect),
#if defined(QT_OPENGL_ES_2)
    m_samples(0),
#else
    m_samples(4),
#endif
    m_windowSamples(0),
    m_initialisedSize(0, 0),
#ifdef USE_SHARED_CONTEXT
    m_context(0),
#else
    m_stateStore(0),
#endif
    m_qtContext(0),
    m_mainThread(QThread::currentThread()),
    m_contextThread(0)
{
    connect(this, &QQuickItem::windowChanged, this, &AbstractDeclarative::handleWindowChanged);
    setAntialiasing(m_samples > 0);

    // Set contents to false in case we are in qml designer to make component look nice
    m_runningInDesigner = QGuiApplication::applicationDisplayName() == "Qml2Puppet";
    setFlag(ItemHasContents, !m_runningInDesigner);
}

AbstractDeclarative::~AbstractDeclarative()
{
#ifdef USE_SHARED_CONTEXT
    // Context can be in another thread, don't delete it directly in that case
    if (m_contextThread && m_contextThread != m_mainThread) {
        if (m_context)
            m_context->deleteLater();
        m_context = 0;
    } else {
        delete m_context;
    }
#else
    if (m_contextThread && m_contextThread != m_mainThread) {
        if (m_stateStore)
            m_stateStore->deleteLater();
        m_stateStore = 0;
    } else {
        delete m_stateStore;
    }
#endif

    disconnect(this, 0, this, 0);
    checkWindowList(0);
}

void AbstractDeclarative::setRenderingMode(AbstractDeclarative::RenderingMode mode)
{
    if (mode == m_renderMode)
        return;

    RenderingMode previousMode = m_renderMode;

    m_renderMode = mode;

    QQuickWindow *win = window();

    switch (mode) {
    case RenderDirectToBackground:
        // Intentional flowthrough
    case RenderDirectToBackground_NoClear:
        m_initialisedSize = QSize(0, 0);
        if (previousMode == RenderIndirect) {
            update();
            setFlag(ItemHasContents, false);
            if (win) {
                QObject::connect(win, &QQuickWindow::beforeRendering, this,
                                 &AbstractDeclarative::render, Qt::DirectConnection);
                checkWindowList(win);
                setAntialiasing(m_windowSamples > 0);
                if (m_windowSamples != m_samples)
                    emit msaaSamplesChanged(m_windowSamples);
            }
        }
        break;
    case RenderIndirect:
        m_initialisedSize = QSize(0, 0);
        setFlag(ItemHasContents, !m_runningInDesigner);
        update();
        if (win) {
            QObject::disconnect(win, &QQuickWindow::beforeRendering, this,
                                &AbstractDeclarative::render);
            checkWindowList(win);
        }
        setAntialiasing(m_samples > 0);
        if (m_windowSamples != m_samples)
            emit msaaSamplesChanged(m_samples);
        break;
    }

    updateWindowParameters();

    emit renderingModeChanged(mode);
}

AbstractDeclarative::RenderingMode AbstractDeclarative::renderingMode() const
{
    return m_renderMode;
}

QSGNode *AbstractDeclarative::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
{
    QSize boundingSize = boundingRect().size().toSize() * m_controller->scene()->devicePixelRatio();
    if (m_runningInDesigner || boundingSize.width() <= 0 || boundingSize.height() <= 0
            || m_controller.isNull() || !window()) {
        delete oldNode;
        return 0;
    }
    DeclarativeRenderNode *node = static_cast<DeclarativeRenderNode *>(oldNode);

    if (!node) {
        node = new DeclarativeRenderNode(this);
        node->setController(m_controller.data());
        node->setQuickWindow(window());
    }

    node->setSize(boundingSize);
    node->setSamples(m_samples);
    node->update();
    node->markDirty(QSGNode::DirtyMaterial);

    return node;
}

Declarative3DScene* AbstractDeclarative::scene() const
{
    return static_cast<Declarative3DScene *>(m_controller->scene());
}

void AbstractDeclarative::setTheme(Q3DTheme *theme)
{
    m_controller->setActiveTheme(theme);
}

Q3DTheme *AbstractDeclarative::theme() const
{
    return m_controller->activeTheme();
}

void AbstractDeclarative::clearSelection()
{
    m_controller->clearSelection();
}

void AbstractDeclarative::setSelectionMode(SelectionFlags mode)
{
    int intmode = int(mode);
    m_controller->setSelectionMode(QAbstract3DGraph::SelectionFlags(intmode));
}

AbstractDeclarative::SelectionFlags AbstractDeclarative::selectionMode() const
{
    int intmode = int(m_controller->selectionMode());
    return SelectionFlags(intmode);
}

void AbstractDeclarative::setShadowQuality(ShadowQuality quality)
{
    m_controller->setShadowQuality(QAbstract3DGraph::ShadowQuality(quality));
}

AbstractDeclarative::ShadowQuality AbstractDeclarative::shadowQuality() const
{
    return ShadowQuality(m_controller->shadowQuality());
}

bool AbstractDeclarative::shadowsSupported() const
{
    return m_controller->shadowsSupported();
}

void AbstractDeclarative::setSharedController(Abstract3DController *controller)
{
    Q_ASSERT(controller);
    m_controller = controller;

    // Reset default theme, as the default C++ theme is Q3DTheme, not DeclarativeTheme3D.
    DeclarativeTheme3D *defaultTheme = new DeclarativeTheme3D;
    defaultTheme->d_ptr->setDefaultTheme(true);
    defaultTheme->setType(Q3DTheme::ThemeQt);
    m_controller->setActiveTheme(defaultTheme);

    QObject::connect(m_controller.data(), &Abstract3DController::shadowQualityChanged, this,
                     &AbstractDeclarative::handleShadowQualityChange);
    QObject::connect(m_controller.data(), &Abstract3DController::activeInputHandlerChanged, this,
                     &AbstractDeclarative::inputHandlerChanged);
    QObject::connect(m_controller.data(), &Abstract3DController::activeThemeChanged, this,
                     &AbstractDeclarative::themeChanged);
    QObject::connect(m_controller.data(), &Abstract3DController::selectionModeChanged, this,
                     &AbstractDeclarative::handleSelectionModeChange);

    QObject::connect(m_controller.data(), &Abstract3DController::axisXChanged, this,
                     &AbstractDeclarative::handleAxisXChanged);
    QObject::connect(m_controller.data(), &Abstract3DController::axisYChanged, this,
                     &AbstractDeclarative::handleAxisYChanged);
    QObject::connect(m_controller.data(), &Abstract3DController::axisZChanged, this,
                     &AbstractDeclarative::handleAxisZChanged);
}

void AbstractDeclarative::activateOpenGLContext(QQuickWindow *window)
{
#ifdef USE_SHARED_CONTEXT
    // We can assume we are not in middle of AbstractDeclarative destructor when we are here,
    // since m_context creation is always done when this function is called from
    // synchDataToRenderer(), which blocks main thread -> no need to mutex.
    if (!m_context || !m_qtContext || m_contextWindow != window) {
        QOpenGLContext *currentContext = QOpenGLContext::currentContext();

        // Note: Changing graph to different window when using multithreaded renderer will break!

        delete m_context;

        m_contextThread = QThread::currentThread();
        m_contextWindow = window;
        m_qtContext = currentContext;

        m_context = new QOpenGLContext();
        m_context->setFormat(m_qtContext->format());
        m_context->setShareContext(m_qtContext);
        m_context->create();

        m_context->makeCurrent(window);
        m_controller->initializeOpenGL();
    } else {
        m_context->makeCurrent(window);
    }
#else
    // Shared contexts don't work properly in some platforms, so just store the
    // context state on those
    if (!m_stateStore || !m_qtContext || m_contextWindow != window) {
        QOpenGLContext *currentContext = QOpenGLContext::currentContext();

        // Note: Changing graph to different window when using multithreaded renderer will break!

        delete m_stateStore;

        m_contextThread = QThread::currentThread();
        m_contextWindow = window;
        m_qtContext = currentContext;

        m_stateStore = new GLStateStore(QOpenGLContext::currentContext());

        m_stateStore->storeGLState();
        m_controller->initializeOpenGL();
    } else {
        m_stateStore->storeGLState();
    }
#endif
}

void AbstractDeclarative::doneOpenGLContext(QQuickWindow *window)
{
#ifdef USE_SHARED_CONTEXT
    m_qtContext->makeCurrent(window);
#else
    Q_UNUSED(window)
    m_stateStore->restoreGLState();
#endif
}

void AbstractDeclarative::synchDataToRenderer()
{
    if (m_renderMode == RenderDirectToBackground && clearList.size())
        clearList.clear();

    QQuickWindow *win = window();
    activateOpenGLContext(win);
    m_controller->synchDataToRenderer();
    doneOpenGLContext(win);
}

int AbstractDeclarative::msaaSamples() const
{
    if (m_renderMode == RenderIndirect)
        return m_samples;
    else
        return m_windowSamples;
}

void AbstractDeclarative::setMsaaSamples(int samples)
{
    if (m_renderMode != RenderIndirect) {
        qWarning("Multisampling cannot be adjusted in this render mode");
    } else {
#if defined(QT_OPENGL_ES_2)
        if (samples > 0)
            qWarning("Multisampling is not supported in OpenGL ES2");
#else
        if (m_samples != samples) {
            m_samples = samples;
            setAntialiasing(m_samples > 0);
            emit msaaSamplesChanged(samples);
            update();
        }
#endif
    }
}

void AbstractDeclarative::handleWindowChanged(QQuickWindow *window)
{
    checkWindowList(window);

    if (!window)
        return;

    connect(window, &QObject::destroyed, this, &AbstractDeclarative::windowDestroyed);

    int oldWindowSamples = m_windowSamples;
    m_windowSamples = window->format().samples();
    if (m_windowSamples < 0)
        m_windowSamples = 0;

    connect(window, &QQuickWindow::beforeSynchronizing,
            this, &AbstractDeclarative::synchDataToRenderer,
            Qt::DirectConnection);

    if (m_renderMode == RenderDirectToBackground_NoClear
            || m_renderMode == RenderDirectToBackground) {
        connect(window, &QQuickWindow::beforeRendering, this, &AbstractDeclarative::render,
                Qt::DirectConnection);
        setAntialiasing(m_windowSamples > 0);
        if (m_windowSamples != oldWindowSamples)
            emit msaaSamplesChanged(m_windowSamples);
    }

    connect(m_controller.data(), &Abstract3DController::needRender, window, &QQuickWindow::update);

    updateWindowParameters();

#if defined(Q_OS_IOS)
    // Scenegraph render cycle in iOS sometimes misses update after beforeSynchronizing signal.
    // This ensures we don't end up displaying the graph without any data, in case update is
    // skipped after synchDataToRenderer.
    QTimer::singleShot(0, window, SLOT(update()));
#endif
}

void AbstractDeclarative::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    QQuickItem::geometryChanged(newGeometry, oldGeometry);

    m_cachedGeometry = newGeometry;

    updateWindowParameters();
}

void AbstractDeclarative::itemChange(ItemChange change, const ItemChangeData & value)
{
    QQuickItem::itemChange(change, value);
    updateWindowParameters();
}

void AbstractDeclarative::updateWindowParameters()
{
    // Update the device pixel ratio, window size and bounding box
    QQuickWindow *win = window();
    if (win && !m_controller.isNull()) {
        Q3DScene *scene = m_controller->scene();
        if (win->devicePixelRatio() != scene->devicePixelRatio()) {
            scene->setDevicePixelRatio(win->devicePixelRatio());
            win->update();
        }

        bool directRender = m_renderMode == RenderDirectToBackground
                || m_renderMode == RenderDirectToBackground_NoClear;
        QSize windowSize;

        if (directRender)
            windowSize = win->size();
        else
            windowSize = m_cachedGeometry.size().toSize();

        if (windowSize != scene->d_ptr->windowSize()) {
            scene->d_ptr->setWindowSize(windowSize);
            win->update();
        }

        if (directRender) {
            // Origin mapping is needed when rendering directly to background
            QPointF point = QQuickItem::mapToScene(QPointF(0.0, 0.0));
            scene->d_ptr->setViewport(QRect(point.x() + 0.5f, point.y() + 0.5f,
                                            m_cachedGeometry.width() + 0.5f,
                                            m_cachedGeometry.height() + 0.5f));
        } else {
            // No translation needed when rendering to FBO
            scene->d_ptr->setViewport(QRect(0.0, 0.0, m_cachedGeometry.width() + 0.5f,
                                            m_cachedGeometry.height() + 0.5f));
        }
    }
}

void AbstractDeclarative::handleSelectionModeChange(QAbstract3DGraph::SelectionFlags mode)
{
    int intmode = int(mode);
    emit selectionModeChanged(SelectionFlags(intmode));
}

void AbstractDeclarative::handleShadowQualityChange(QAbstract3DGraph::ShadowQuality quality)
{
    emit shadowQualityChanged(ShadowQuality(quality));
}

void AbstractDeclarative::render()
{
    updateWindowParameters();

    // If we're not rendering directly to the background, return
    if (m_renderMode != RenderDirectToBackground && m_renderMode != RenderDirectToBackground_NoClear)
        return;

    // Clear the background once per window as that is not done by default
    QQuickWindow *win = window();
    activateOpenGLContext(win);
    if (m_renderMode == RenderDirectToBackground && !clearList.contains(win)) {
        clearList.append(win);
        QColor clearColor = win->color();
        glClearColor(clearColor.redF(), clearColor.greenF(), clearColor.blueF(), 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);
    }

    if (isVisible()) {
        glDepthMask(GL_TRUE);
        glEnable(GL_DEPTH_TEST);
        glDepthFunc(GL_LESS);
        glEnable(GL_CULL_FACE);
        glCullFace(GL_BACK);
        glDisable(GL_BLEND);

        m_controller->render();

        glEnable(GL_BLEND);
    }
    doneOpenGLContext(win);
}

QAbstract3DInputHandler* AbstractDeclarative::inputHandler() const
{
    return m_controller->activeInputHandler();
}

void AbstractDeclarative::setInputHandler(QAbstract3DInputHandler *inputHandler)
{
    m_controller->setActiveInputHandler(inputHandler);
}

void AbstractDeclarative::mouseDoubleClickEvent(QMouseEvent *event)
{
    m_controller->mouseDoubleClickEvent(event);
}

void AbstractDeclarative::touchEvent(QTouchEvent *event)
{
    m_controller->touchEvent(event);
    window()->update();
}

void AbstractDeclarative::mousePressEvent(QMouseEvent *event)
{
    QPoint mousePos = event->pos();
    m_controller->mousePressEvent(event, mousePos);
}

void AbstractDeclarative::mouseReleaseEvent(QMouseEvent *event)
{
    QPoint mousePos = event->pos();
    m_controller->mouseReleaseEvent(event, mousePos);
}

void AbstractDeclarative::mouseMoveEvent(QMouseEvent *event)
{
    QPoint mousePos = event->pos();
    m_controller->mouseMoveEvent(event, mousePos);
}

void AbstractDeclarative::wheelEvent(QWheelEvent *event)
{
    m_controller->wheelEvent(event);
}

void AbstractDeclarative::checkWindowList(QQuickWindow *window)
{
    QQuickWindow *oldWindow = graphWindowList.value(this);

    graphWindowList[this] = window;

    if (oldWindow != window && oldWindow) {
        QObject::disconnect(oldWindow, &QObject::destroyed, this,
                            &AbstractDeclarative::windowDestroyed);
        QObject::disconnect(oldWindow, &QQuickWindow::beforeSynchronizing, this,
                            &AbstractDeclarative::synchDataToRenderer);
        QObject::disconnect(oldWindow, &QQuickWindow::beforeRendering, this,
                            &AbstractDeclarative::render);
        if (!m_controller.isNull()) {
            QObject::disconnect(m_controller.data(), &Abstract3DController::needRender,
                                oldWindow, &QQuickWindow::update);
        }
    }

    QList<QQuickWindow *> windowList;

    foreach (AbstractDeclarative *graph, graphWindowList.keys()) {
        if (graph->m_renderMode == RenderDirectToBackground
                || graph->m_renderMode == RenderDirectToBackground_NoClear) {
            windowList.append(graphWindowList.value(graph));
        }
    }

    if (oldWindow && !windowList.contains(oldWindow)
            && windowClearList.values(oldWindow).size() != 0) {
        // Return window clear value
        oldWindow->setClearBeforeRendering(windowClearList.value(oldWindow));
        windowClearList.remove(oldWindow);
    }

    if (!window) {
        graphWindowList.remove(this);
        return;
    }

    if ((m_renderMode == RenderDirectToBackground
         || m_renderMode == RenderDirectToBackground_NoClear)
            && windowClearList.values(window).size() == 0) {
        // Save old clear value
        windowClearList[window] = window->clearBeforeRendering();
        // Disable clearing of the window as we render underneath
        window->setClearBeforeRendering(false);
    }
}

void AbstractDeclarative::windowDestroyed(QObject *obj)
{
    // Remove destroyed window from window lists
    QQuickWindow *win = static_cast<QQuickWindow *>(obj);
    QQuickWindow *oldWindow = graphWindowList.value(this);

    if (win == oldWindow)
        graphWindowList.remove(this);

    windowClearList.remove(win);
}

QT_END_NAMESPACE_DATAVISUALIZATION