Commit 2192560d74e6e6cf99dd05928885573be00a8208
2023-05-31T13:02:42
Disallow merged upsampling with lossless decomp Colorspace conversion is explicitly not supported with lossless JPEG images. Merged upsampling implies YCbCr-to-RGB colorspace conversion, so allowing it with lossless decompression was an oversight. 9f756bc67a84d4566bf74a0c2432aa55da404021 eliminated interaction issues between the lossless decompressor and the merged upsampler related to out-of-range 12-bit samples, but referring to #690, other interaction issues apparently still exist. Such issues are likely, given the fact that the merged upsampler was never designed with lossless decompression in mind. This commit also extends the decompress fuzzer so that it catches the issue reported in #690. Fixes #690 Redundantly fixes #670 Redundantly fixes #675