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Do not use a palette for one color images.

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1 color images now always take 30 bytes.

Change-Id: Ifa86bc5320362c659672b3836160353d63576467
This commit is contained in:
Vincent Rabaud
2021-04-28 13:14:28 +02:00
parent 98bbe35b51
commit b6513fbaa8
3 changed files with 39 additions and 1 deletions
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13
src/enc/vp8l_enc.c
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@ -591,6 +591,19 @@ 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);