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Revert "Do not use a palette for one color images."

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This reverts commit b6513fbaa8.

This change can produce files that can cause decode failures in some
versions of chrome and safari/ios/macos.

https://chromium-review.googlesource.com/c/chromium/src/+/2876279

The chrome fix will be available in M92. This change can be revisited
after it and the mac updates are more widely deployed.

Bug: b/186640109,b/188702956
Change-Id: I296b8fe88c6c48219e3edf532226c4f972f1605b
This commit is contained in:
James Zern
2021-05-21 10:23:05 -07:00
parent 6fb4cddc93
commit b60869a18e
3 changed files with 1 additions and 39 deletions
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13
src/enc/vp8l_enc.c
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@ -591,19 +591,6 @@ static int EncoderAnalyze(VP8LEncoder* const enc,
sizeof(*enc->palette_sorted_), PaletteCompareColorsForQsort);
}
if (use_palette && enc->palette_size_ == 1) {
crunch_configs[0].entropy_idx_ = kDirect;
crunch_configs[0].sub_configs_size_ = 1;
crunch_configs[0].sub_configs_[0].lz77_ = kLZ77None;
crunch_configs[0].sub_configs_[0].do_no_cache_ = 1;
*crunch_configs_size = 1;
// Get the entropy image as small as possible.
enc->histo_bits_ = MAX_HUFFMAN_BITS;
// The transform image is unused as we are direct.
enc->transform_bits_ = MAX_TRANSFORM_BITS;
return 1;
}
// Empirical bit sizes.
enc->histo_bits_ = GetHistoBits(method, use_palette,
pic->width, pic->height);