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 | ** $QT_BEGIN_LICENSE:GPL$ | ||
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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) | ||||
{ | ||||
initializeOpenGLFunctions(); | ||||
// Our texture node must have a texture, so use a default one pixel texture | ||||
GLuint defaultTexture = 0; | ||||
glGenTextures(1, &defaultTexture); | ||||
glBindTexture(GL_TEXTURE_2D, defaultTexture); | ||||
uchar buf[4] = { 0, 0, 0, 0 }; | ||||
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &buf); | ||||
QQuickWindow::CreateTextureOptions defaultTextureOptions = QQuickWindow::CreateTextureOptions( | ||||
QQuickWindow::TextureHasAlphaChannel | QQuickWindow::TextureOwnsGLTexture); | ||||
m_texture = m_window->createTextureFromId(defaultTexture, QSize(1, 1), defaultTextureOptions); | ||||
setTexture(m_texture); | ||||
setFiltering(QSGTexture::Linear); | ||||
// 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 | ||||
} | ||||
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 | ||||