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https://forum.qt.io/topic/17209/qt-4-8-and-gif-image-support
QT 4.8 and gif image support. This topic has been deleted. Only users with topic management privileges can see it. Nosf last edited by . Hey Guys, I recently switched from static to shared lib build and first thing in 4.8.2 I saw was my gif image in a label (animated gif) was not appearing.
https://stackoverflow.com/questions/42635505/how-to-fix-missing-jpeg-support-in-qt-4-8-under-linux-kde4
On Arch Linux, using Qt-4.8.7 and PySide-1.2.4, I get the same list, but with the following additions: gif, ico, jpeg, jpg, mng, svg, svgz, tif, tiff, webp.So it would seem that there are quite a few other image formats missing from the list shown on your system.
https://doc.qt.io/archives/qt-4.8/configure-options.html
Configuration Options for Qt. ... -no-gif: Do not compile GIF reading support. This option denotes a default value and needs to be evaluated. If the evaluation succeeds, the feature is included.-no-libpng: Do not compile PNG support.-qt-libpng: Use the libpng bundled with Qt.
https://doc.qt.io/archives/qt-4.8/qimagereader.html
Image formats that support this operation are expected to initialize the background to color before reading an image. This function was introduced in Qt 4.1. See also backgroundColor() and read(). void QImageReader:: setClipRect (const QRect & rect) Sets the image clip rect (also known as the ROI, or Region Of Interest) to rect.
https://www.qtcentre.org/threads/66127-Configure-qt-4-8-6-for-embedded
Jun 01, 2016 · When I run an app, I see warnings in the stderr about not finding libicui18n that were not there before. The library was never on the file system. We have a previous pre-built qt 4.8.6 for which I don't have the configure log. The following is my configure line and what is printed during configure/make. Why is there a libicu dependency and how do I
https://doc.qt.io/archives/qt-4.8/qpixmap.html
This function was introduced in Qt 4.8. QImage QPixmap:: toImage const. Converts the pixmap to a QImage. Returns a null image if the conversion fails. If the pixmap has 1-bit depth, the returned image will also be 1 bit deep. Images with more bits will be returned in a …
https://doc.qt.io/archives/qt-4.8/qmovie.html
Detailed Description. The QMovie class is a convenience class for playing movies with QImageReader.. This class is used to show simple animations without sound. If you want to display video and media content, use the Phonon multimedia framework instead.. First, create a QMovie object by passing either the name of a file or a pointer to a QIODevice containing an animated image format to QMovie ...
https://doc.qt.io/qt-5/qtimageformats-index.html
The core Qt Gui library by default supports reading and writing image files of the most common file formats: PNG, JPEG, BMP, GIF and a few more, ref. Reading and Writing Image Files.The Qt Image Formats add-on module provides optional support for other image file formats.
https://forum.qt.io/topic/17143/solved-jpeg-support-in-qt-4-8-1-qtcreator-2-4-1-linux-64bit/3
Yeah I've noticed too, that my plotting library suddenly can't export jpegs anymore. That's not so dramatic since who wants to export pixel precise plots as jpeg, but still, Qt promises JPG/JPEG is available ("By default, Qt can write the following format...
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