declarativechartnode.cpp
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| text/x-c
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r2854 | /**************************************************************************** | ||
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r2820 | ** | ||
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r2854 | ** Copyright (C) 2016 The Qt Company Ltd. | ||
| ** Contact: https://www.qt.io/licensing/ | ||||
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r2820 | ** | ||
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r2854 | ** This file is part of the Qt Charts module of the Qt Toolkit. | ||
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r2820 | ** | ||
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r2854 | ** $QT_BEGIN_LICENSE:GPL$ | ||
Titta Heikkala
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r2845 | ** Commercial License Usage | ||
| ** Licensees holding valid commercial Qt licenses may use this file in | ||||
| ** accordance with the commercial license agreement provided with the | ||||
| ** Software or, alternatively, in accordance with the terms contained in | ||||
| ** a written agreement between you and The Qt Company. For licensing terms | ||||
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r2854 | ** and conditions see https://www.qt.io/terms-conditions. For further | ||
| ** information use the contact form at https://www.qt.io/contact-us. | ||||
| ** | ||||
| ** GNU General Public License Usage | ||||
| ** Alternatively, this file may be used under the terms of the GNU | ||||
| ** General Public License version 3 or (at your option) any later version | ||||
| ** approved by the KDE Free Qt Foundation. The licenses are as published by | ||||
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 | ||||
| ** included in the packaging of this file. Please review the following | ||||
| ** information to ensure the GNU General Public License requirements will | ||||
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. | ||||
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r2820 | ** | ||
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r2845 | ** $QT_END_LICENSE$ | ||
| ** | ||||
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r2854 | ****************************************************************************/ | ||
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r2820 | |||
| #include "declarativechartnode.h" | ||||
| #include "declarativerendernode.h" | ||||
| #include <QtGui/QOpenGLContext> | ||||
| #include <QtGui/QOpenGLFunctions> | ||||
| #include <QtGui/QOpenGLFramebufferObjectFormat> | ||||
| #include <QtGui/QOpenGLFramebufferObject> | ||||
| #include <QOpenGLShaderProgram> | ||||
| #include <QtGui/QOpenGLBuffer> | ||||
| QT_CHARTS_BEGIN_NAMESPACE | ||||
| // This node handles displaying of the chart itself | ||||
| DeclarativeChartNode::DeclarativeChartNode(QQuickWindow *window) : | ||||
| QSGSimpleTextureNode(), | ||||
| m_texture(0), | ||||
| m_window(window), | ||||
| m_textureOptions(0), | ||||
| m_textureSize(1, 1), | ||||
| m_glRenderNode(0) | ||||
| { | ||||
| // Our texture node must have a texture, so use a default one pixel texture | ||||
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r2868 | QImage dummyImage(QSize(1, 1), QImage::Format_ARGB32); | ||
| uchar *imageData = dummyImage.bits(); | ||||
| imageData[0] = 0; | ||||
| imageData[1] = 0; | ||||
| imageData[2] = 0; | ||||
| imageData[3] = 0; | ||||
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r2820 | QQuickWindow::CreateTextureOptions defaultTextureOptions = QQuickWindow::CreateTextureOptions( | ||
| QQuickWindow::TextureHasAlphaChannel | QQuickWindow::TextureOwnsGLTexture); | ||||
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r2868 | m_texture = m_window->createTextureFromImage(dummyImage, defaultTextureOptions); | ||
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r2820 | |||
| setTexture(m_texture); | ||||
| setFiltering(QSGTexture::Linear); | ||||
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r2868 | if (QOpenGLContext::currentContext()) { | ||
| // Create child node for rendering GL graphics | ||||
| m_glRenderNode = new DeclarativeRenderNode(m_window); | ||||
| m_glRenderNode->setFlag(OwnedByParent); | ||||
| appendChildNode(m_glRenderNode); | ||||
| m_glRenderNode->setRect(0, 0, 0, 0); // Hide child node by default | ||||
| } | ||||
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r2820 | } | ||
| DeclarativeChartNode::~DeclarativeChartNode() | ||||
| { | ||||
| delete m_texture; | ||||
| } | ||||
| // Must be called on render thread and in context | ||||
| void DeclarativeChartNode::createTextureFromImage(const QImage &chartImage) | ||||
| { | ||||
| if (chartImage.size() != m_textureSize) | ||||
| m_textureSize = chartImage.size(); | ||||
| delete m_texture; | ||||
| m_texture = m_window->createTextureFromImage(chartImage, m_textureOptions); | ||||
| setTexture(m_texture); | ||||
| } | ||||
| QT_CHARTS_END_NAMESPACE | ||||