tree 5ab4b7114714d01626937177591fa8c0ace7e3f0
parent f165f799aec778065e4ec97b8a2da0f049b499af
author Nigel Tao <nigeltao@google.com> 1601293987 +1000
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1601922288 +0000

Have SkWuffsCodec use PIXEL_BLEND__SRC_OVER

This takes the "one pass" code path more often, using less memory, as it
does not have to allocate an intermediate width*height pixel buffer.

Wuffs v0.2 did not support SRC_OVER, only SRC, but Wuffs v0.3 does.

The gif-transparent-index.gif test file comes from the
test/data/artificial directory of the github.com/google/wuffs
repository. It was programmatically generated.

The new GifTest.cpp test passes with skia_use_wuffs true or false, with
or without the SkWuffsCodec.cpp change.

Change-Id: I46fb4c849319fbefc39f331416a8b7d3836093ce
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/320116
Commit-Queue: Leon Scroggins <scroggo@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>