- Added Size and Format options support
- Fixed a double image allocation when reading RGBA images (RGB was always allocated and then replaced by RGBA one)
- Fixed the code for sequential devices
The Size option is used by the KIO 5 thumbnailer to avoid to use too memory. A backport to KF5 would serve CCBUG: 413801 and CCBUG: 479612
Prior libavif 1.0, quality was set using two numbers
(minQuantizer and maxQuantizer).
New versions of libavif recommend using
new/single quality parameter instead.
Compression using the new settings is different
compared to the old.
For example, new quality 68 gives similar compression
like old default 52.
Fixes not loading a second image in the file. This patch allow code like the following.
QImageReader r(file);
do {
auto qi = r.read();
if (!qi.isNull()) {
qi.save(QString("/tmp/%1_%2.tif")
.arg(QFileInfo(file).baseName())
.arg(r.currentImageNumber()));
}
}
while (r.jumpToNextImage());
m_startPos is used to reposition the device if you decide to do a subsequent read: libraw wants it to be at the beginning of the RAW stream
- Added support for writing EXR files
- Large image support (tested with 32GiB 16-bit image)
- OpenEXR multithreaded read/write support through the use of line blocks
- Build option to enable conversion to sRGB when read (disabled by default)
- Multi-view image reading support
- Options support: Size, ImageFormat, Quality, CompressRatio
- Metadata write/read support via EXR attributes
The plugin is now quite complete. It should also work on KF5 (not tested): if there is the will to include this MR also on KF5, let me know and I will do all the necessary tests.
struct QoiHeader is initialized to invalid values prior use,
it’s good to detect situations when we read incomplete data.
Add include in scanlineconverter.cpp so it can be used without
change in kf5 branch.
Added support for RLE compressed images. This patch makes the player almost complete allowing to read all type 1,2 and 3 RAS files. Only types 4 and 5 are missing which are images converted from TIFF and IFF.
As a base I used the reference implementation found on the official site at https://qoiformat.org/ (MIT license).
I added a class to convert scan lines in scanlineconverter.cpp. The class takes advantage of the QImage conversion and contrary to what one might expect, with large images it improves performance (compared to converting the whole image) 😄
In progressive mode, for each line, the following conversions (only if needed) are made before saving:
1. If the icc profile is set, the line is converted to sRGB or sRGB Linear.
2. The line is scaled to 8 bits with RGBA order.
- Progressive load from file
- Added support for 1-bit image
- Images with palette are now Index (instead of RGB32)
- Added options support (Size, Format)
- Added some test cases
- Improved performance by directly accessing the scanline
- Support for more RAS extension (taken from GIMP)
The code should works "as is" also on KF5.
- Support for images with transparency
- Precise colorspace conversion using QT color spaces
- Set the correct resolution
- Set useful metadata
- Support for RGBX16FPx4 format in Qt 6
- Speed improvements
This is a patch over MR !108 by @sandsmark. Martin has done a great job implementing support and I find it a shame not to use it.
I made sure that the results are the same as the current version and fixed the problems of pixels with wrong colors with color depth grater than 8 bits. I also fixed conversion errors on mask and gray images (16/32 bits).
Unfortunately the internal rendering engine of the original code is 8-bit so I always forced the output of 8-bit images to correct the problems (see image below). Since it is a plugin with a "rendering engine", the tests to seriously validate it are potentially endless (as the original version is not perfect).
Errors of the original version of the MR (right) which should no longer occur:
- fix buffer overflow with corrupted images without image data
- fix unable to read very small images (e.g. 1x1 px)
- new test cases added
- detect incomplete files by checking the end of streams as written in the specs
