diff options
Diffstat (limited to 'src/3rdparty/libjpeg/src/ChangeLog.md')
| -rw-r--r-- | src/3rdparty/libjpeg/src/ChangeLog.md | 72 |
1 files changed, 53 insertions, 19 deletions
diff --git a/src/3rdparty/libjpeg/src/ChangeLog.md b/src/3rdparty/libjpeg/src/ChangeLog.md index 59fb2de96a..7b5f875464 100644 --- a/src/3rdparty/libjpeg/src/ChangeLog.md +++ b/src/3rdparty/libjpeg/src/ChangeLog.md @@ -1,3 +1,37 @@ +2.0.6 +===== + +### Significant changes relative to 2.0.5: + +1. Fixed "using JNI after critical get" errors that occurred on Android +platforms when using any of the YUV encoding/compression/decompression/decoding +methods in the TurboJPEG Java API. + +2. Fixed or worked around multiple issues with `jpeg_skip_scanlines()`: + + - Fixed segfaults or "Corrupt JPEG data: premature end of data segment" +errors in `jpeg_skip_scanlines()` that occurred when decompressing 4:2:2 or +4:2:0 JPEG images using merged (non-fancy) upsampling/color conversion (that +is, when setting `cinfo.do_fancy_upsampling` to `FALSE`.) 2.0.0[6] was a +similar fix, but it did not cover all cases. + - `jpeg_skip_scanlines()` now throws an error if two-pass color +quantization is enabled. Two-pass color quantization never worked properly +with `jpeg_skip_scanlines()`, and the issues could not readily be fixed. + - Fixed an issue whereby `jpeg_skip_scanlines()` always returned 0 when +skipping past the end of an image. + +3. The Arm 64-bit (Armv8) Neon SIMD extensions can now be built using MinGW +toolchains targetting Arm64 (AArch64) Windows binaries. + +4. Fixed unexpected visual artifacts that occurred when using +`jpeg_crop_scanline()` and interblock smoothing while decompressing only the DC +scan of a progressive JPEG image. + +5. Fixed an issue whereby libjpeg-turbo would not build if 12-bit-per-component +JPEG support (`WITH_12BIT`) was enabled along with libjpeg v7 or libjpeg v8 +API/ABI emulation (`WITH_JPEG7` or `WITH_JPEG8`.) + + 2.0.5 ===== @@ -64,7 +98,7 @@ other user-visible errant behavior, and given that the lossless transformer (unlike the decompressor) is not generally exposed to arbitrary data exploits, this issue did not likely pose a security risk. -6. The ARM 64-bit (ARMv8) NEON SIMD assembly code now stores constants in a +6. The Arm 64-bit (Armv8) Neon SIMD assembly code now stores constants in a separate read-only data section rather than in the text section, to support execute-only memory layouts. @@ -246,7 +280,7 @@ detect actual security issues, should they arise in the future. 1. Added AVX2 SIMD implementations of the colorspace conversion, chroma downsampling and upsampling, integer quantization and sample conversion, and -slow integer DCT/IDCT algorithms. When using the slow integer DCT/IDCT +accurate integer DCT/IDCT algorithms. When using the accurate integer DCT/IDCT algorithms on AVX2-equipped CPUs, the compression of RGB images is approximately 13-36% (avg. 22%) faster (relative to libjpeg-turbo 1.5.x) with 64-bit code and 11-21% (avg. 17%) faster with 32-bit code, and the @@ -350,16 +384,16 @@ algorithm that caused incorrect dithering in the output image. This algorithm now produces bitwise-identical results to the unmerged algorithms. 12. The SIMD function symbols for x86[-64]/ELF, MIPS/ELF, macOS/x86[-64] (if -libjpeg-turbo is built with YASM), and iOS/ARM[64] builds are now private. +libjpeg-turbo is built with YASM), and iOS/Arm[64] builds are now private. This prevents those symbols from being exposed in applications or shared libraries that link statically with libjpeg-turbo. 13. Added Loongson MMI SIMD implementations of the RGB-to-YCbCr and YCbCr-to-RGB colorspace conversion, 4:2:0 chroma downsampling, 4:2:0 fancy -chroma upsampling, integer quantization, and slow integer DCT/IDCT algorithms. -When using the slow integer DCT/IDCT, this speeds up the compression of RGB -images by approximately 70-100% and the decompression of RGB images by -approximately 2-3.5x. +chroma upsampling, integer quantization, and accurate integer DCT/IDCT +algorithms. When using the accurate integer DCT/IDCT, this speeds up the +compression of RGB images by approximately 70-100% and the decompression of RGB +images by approximately 2-3.5x. 14. Fixed a build error when building with older MinGW releases (regression caused by 1.5.1[7].) @@ -409,9 +443,9 @@ end of a single-scan (non-progressive) image, subsequent calls to `jpeg_consume_input()` would return `JPEG_SUSPENDED` rather than `JPEG_REACHED_EOI`. -9. `jpeg_crop_scanlines()` now works correctly when decompressing grayscale -JPEG images that were compressed with a sampling factor other than 1 (for -instance, with `cjpeg -grayscale -sample 2x2`). +9. `jpeg_crop_scanline()` now works correctly when decompressing grayscale JPEG +images that were compressed with a sampling factor other than 1 (for instance, +with `cjpeg -grayscale -sample 2x2`). 1.5.2 @@ -435,7 +469,7 @@ on PowerPC-based AmigaOS 4 and OpenBSD systems. 5. Fixed build and runtime errors on Windows that occurred when building libjpeg-turbo with libjpeg v7 API/ABI emulation and the in-memory source/destination managers. Due to an oversight, the `jpeg_skip_scanlines()` -and `jpeg_crop_scanlines()` functions were not being included in jpeg7.dll when +and `jpeg_crop_scanline()` functions were not being included in jpeg7.dll when libjpeg-turbo was built with `-DWITH_JPEG7=1` and `-DWITH_MEMSRCDST=1`. 6. Fixed "Bogus virtual array access" error that occurred when using the @@ -691,8 +725,8 @@ benchmarking or regression testing, SIMD-accelerated Huffman encoding can be disabled by setting the `JSIMD_NOHUFFENC` environment variable to `1`. 13. Added ARM 64-bit (ARMv8) NEON SIMD implementations of the commonly-used -compression algorithms (including the slow integer forward DCT and h2v2 & h2v1 -downsampling algorithms, which are not accelerated in the 32-bit NEON +compression algorithms (including the accurate integer forward DCT and h2v2 & +h2v1 downsampling algorithms, which are not accelerated in the 32-bit NEON implementation.) This speeds up the compression of full-color JPEGs by about 75% on average on a Cavium ThunderX processor and by about 2-2.5x on average on Cortex-A53 and Cortex-A57 cores. @@ -823,8 +857,8 @@ platforms other than Windows or Linux. Oops. 7. Fixed an extremely rare bug in the Huffman encoder that caused 64-bit builds of libjpeg-turbo to incorrectly encode a few specific test images when -quality=98, an optimized Huffman table, and the slow integer forward DCT were -used. +quality=98, an optimized Huffman table, and the accurate integer forward DCT +were used. 8. The Windows (CMake) build system now supports building only static or only shared libraries. This is accomplished by adding either `-DENABLE_STATIC=0` or @@ -983,8 +1017,8 @@ floating point inverse DCT (using code borrowed from libjpeg v8a and later.) The accuracy of this implementation now matches the accuracy of the SSE/SSE2 implementation. Note, however, that the floating point DCT/IDCT algorithms are mainly a legacy feature. They generally do not produce significantly better -accuracy than the slow integer DCT/IDCT algorithms, and they are quite a bit -slower. +accuracy than the accurate integer DCT/IDCT algorithms, and they are quite a +bit slower. 8. Added a new output colorspace (`JCS_RGB565`) to the libjpeg API that allows for decompressing JPEG images into RGB565 (16-bit) pixels. If dithering is not @@ -1394,8 +1428,8 @@ cases. 2. Despite the above, the fast integer forward DCT still degrades somewhat for JPEG qualities greater than 95, so the TurboJPEG wrapper will now automatically -use the slow integer forward DCT when generating JPEG images of quality 96 or -greater. This reduces compression performance by as much as 15% for these +use the accurate integer forward DCT when generating JPEG images of quality 96 +or greater. This reduces compression performance by as much as 15% for these high-quality images but is necessary to ensure that the images are perceptually lossless. It also ensures that the library can avoid the performance pitfall created by [1]. |