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LibGfx: Allow passing FilterType::None to unfilter_scanline()

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Makes calling this in LibPDF less awkward, and there's no reason
not to allow this.
This commit is contained in:
Nico Weber 2023-11-16 20:07:27 -05:00 • committed by Andreas Kling
parent 574357ef00
commit 000d9da73c
1 changed files with 2 additions and 4 deletions
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6
Userland/Libraries/LibGfx/ImageFormats/PNGLoader.cpp
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@ -291,9 +291,9 @@ static_assert(AssertSize<Pixel, 4>());
void PNGImageDecoderPlugin::unfilter_scanline(PNG::FilterType filter, Bytes scanline_data, ReadonlyBytes previous_scanlines_data, u8 bytes_per_complete_pixel) void PNGImageDecoderPlugin::unfilter_scanline(PNG::FilterType filter, Bytes scanline_data, ReadonlyBytes previous_scanlines_data, u8 bytes_per_complete_pixel)
{ {
VERIFY(filter != PNG::FilterType::None);
switch (filter) { switch (filter) {
case PNG::FilterType::None:
break;
case PNG::FilterType::Sub: case PNG::FilterType::Sub:
// This loop starts at bytes_per_complete_pixel because all bytes before that are // This loop starts at bytes_per_complete_pixel because all bytes before that are
// guaranteed to have no valid byte at index (i - bytes_per_complete pixel). // guaranteed to have no valid byte at index (i - bytes_per_complete pixel).
@ -327,8 +327,6 @@ void PNGImageDecoderPlugin::unfilter_scanline(PNG::FilterType filter, Bytes scan
scanline_data[i] += PNG::paeth_predictor(left, above, upper_left); scanline_data[i] += PNG::paeth_predictor(left, above, upper_left);
} }
break; break;
default:
VERIFY_NOT_REACHED();
} }
} }