3a425ab7c1
As it looks now that lib contains way more then I want to pull in so i'm just copying the files i'm interested in.
115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
/*=========================================================================
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Library: CTK
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Copyright (c) Kitware Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0.txt
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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=========================================================================*/
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// Qt includes
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#include <QBuffer>
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#include <QImage>
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//#include <QGLWidget>
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#include <QPainter>
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#include <QWidget>
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// ctkWidgets includes
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#include "ctkWidgetsUtils.h"
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//----------------------------------------------------------------------------
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QString ctk::base64HTMLImageTagSrc(const QImage& image)
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{
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QByteArray byteArray;
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QBuffer buffer(&byteArray);
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buffer.open(QIODevice::WriteOnly);
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image.save(&buffer, "PNG");
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return QString("data:image/png;base64,%1")
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.arg(QString(buffer.data().toBase64()));
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}
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//----------------------------------------------------------------------------
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//QImage ctk::grabWidget(QWidget* widget, QRect rectangle)
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//{
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// if (!widget)
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// {
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// return QImage();
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// }
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// if (!rectangle.isValid())
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// {
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// // Let Qt trigger layout mechanism and compute widget size.
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// rectangle = QRect(0,0,-1,-1);
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// }
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//#if (QT_VERSION < QT_VERSION_CHECK(5, 0, 0))
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// QPixmap widgetPixmap = QPixmap::grabWidget(widget, rectangle);
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//#else
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// QPixmap widgetPixmap = widget->grab(rectangle);
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//#endif
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// QImage widgetImage = widgetPixmap.toImage();
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// QPainter painter;
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// painter.begin(&widgetImage);
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// foreach(QGLWidget* glWidget, widget->findChildren<QGLWidget*>())
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// {
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// if (!glWidget->isVisible())
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// {
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// continue;
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// }
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// QRect subWidgetRect = QRect(glWidget->mapTo(widget, QPoint(0,0)), glWidget->size());
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// if (!rectangle.intersects(subWidgetRect))
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// {
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// continue;
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// }
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// QImage subImage = glWidget->grabFrameBuffer();
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// painter.drawImage(subWidgetRect, subImage);
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// }
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// painter.end();
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// return widgetImage;
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//}
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//----------------------------------------------------------------------------
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QImage ctk::kwIconToQImage(const unsigned char *data, int width, int height, int pixelSize, unsigned int bufferLength, int options)
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{
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Q_UNUSED(options); // not yet supported
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QByteArray imageData = QByteArray::fromRawData(
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reinterpret_cast<const char *>(data), bufferLength);
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unsigned int expectedLength = width * height * pixelSize;
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// Start with a zlib header ? If not, then it must be base64 encoded
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if (bufferLength != expectedLength &&
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static_cast<unsigned char>(imageData[0]) != 0x78 &&
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static_cast<unsigned char>(imageData[1]) != 0xDA)
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{
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imageData = QByteArray::fromBase64(imageData);
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bufferLength = imageData.size();
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}
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if (bufferLength != expectedLength &&
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static_cast<unsigned char>(imageData[0]) == 0x78 &&
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static_cast<unsigned char>(imageData[1]) == 0xDA)
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{
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imageData.prepend(static_cast<char>((expectedLength >> 0) & 0xFF));
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imageData.prepend(static_cast<char>((expectedLength >> 8) & 0xFF));
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imageData.prepend(static_cast<char>((expectedLength >> 16) & 0xFF));
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imageData.prepend(static_cast<char>((expectedLength >> 24) & 0xFF));
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imageData = qUncompress(imageData);
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}
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QImage image(reinterpret_cast<unsigned char*>(imageData.data()),
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width, height, width * pixelSize,
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pixelSize == 4 ? QImage::Format_ARGB32 : QImage::Format_RGB888);
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if (pixelSize == 4)
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{
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return image.rgbSwapped();
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}
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return image.copy();
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}
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