Mirco Miranda authored Jan 27, 2023 and Albert Astals Cid committed Jan 27, 2023

Using an approximated pow function improves the conversion speed of LAB images by more than 50% without an appreciable visual difference.

Mirco Miranda authored Jan 26, 2023 and Albert Astals Cid committed Jan 26, 2023

This patch maps RGB 32-bits PSD to QImage::Format_RGBA32FPx4 or QImage::Format_RGBX32FPx4.

master is for Qt6-based development now

Qt5 development continues in the 'kf5' branch

master is Qt6 now

Mirco Miranda authored Jan 11, 2023 and Albert Astals Cid committed Jan 11, 2023

The VGA palette starts 769 bytes before the end of the file. There may be PADs between the end of the image and the start of the palette.

BUG: 463951

libraw uses fseek when doing files, which allows seeking past the end
without problems, so do the same, otherwise when we report oss-fuzz
issues they say "give me an example to reproduce" and since our seek
and their seek don't behave the same it's hard to convince them
to fix their code

Using C-API instead of C++ libheif API has following advantages:
- More libheif features available (for ex.: strict decoding)
- Linking with static build of libheif is possible
- No need to enable exceptions

Daniel Novomeský authored Nov 19, 2022 and Albert Astals Cid committed Nov 19, 2022

It is mostly only about casting between types.

Mirco Miranda authored Nov 19, 2022 and Albert Astals Cid committed Nov 19, 2022

- If the size of an item is greater than 1 byte, it must be ensured that it is not partially read.
- In many readings, LibRAW gives an error if a partial number of items are read so I always try to read everything.

Mirco Miranda authored Nov 15, 2022 and Daniel Novomeský committed Nov 15, 2022

The plugin can be compiled even with decoder libraries only. In a similar way of HEIC plugin I check if an encoder or a decoder is available.

These are only for kdelibs4support/KServiceTypeTrader

Otherwise we will return false when LibRaw::derror
calls for eof() when it is actually that we have reached eof

and return correct loop count

libavif 0.11.0 uses new default dimension limit 32768 pixels,
we allow 65535 which was used by us previously.
Minor tweaks in jumpToNextImage, jumpToImage
to handle rare situations.

avif does not support loops but endless loop was the behavior before
460085 was fixed, so a workaround is added.

See also: https://github.com/AOMediaCodec/libavif/issues/347

CCBUG: 460085

Otherwise when `cache: false` is set in AnimatedImage, QMovie will try
to read the image forever.

BUG: 460085
FIXED-IN: 5.100

Currently, there is no difference in the tests but in the future
we will add images with various transformations defined.

No longer using int for QByteArray size because Qt6 uses qsizetype

Changes to libavif's avifImageRGBToYUV() API were reverted too.

In recent libheif, application should use
heif_init/heif_deinit calls. Unfortunately, these calls are
not thread-safe in released 1.13.0 version yet (will be in the
future) and HEIFHandler is often created in different threads.
So we have to guard their use with a mutex.