Reland "Treat kWEBP encode with quality=100 as lossless"
This reverts commit 22170b317800325408310e144194d6c024d571bc.
It was reverted due to the test breaking Google3. This includes a
workaround.
Original change's description:
> Treat kWEBP encode with quality=100 as lossless
>
> In SkEncodeImage and friends, treat quality of 100 as a lossless encode
> when using kWEBP. This seems a good fit for the intent - which is
> presumably to save the highest quality image. This also matches
> Chromium's blink::ImageEncoder::ComputeWebpOptions, which treats a
> quality of 1 (on a float scale from 0 to 1) as a lossless encode.
>
> FWIW, Chromium has had this behavior since
> https://codereview.chromium.org/1937433002, in response to
> crbug.com/523098. The goal is to "maintain sharpness to
> match the JPEG encoder behavior (use WEBP lossless encoding)".
>
> Add a test to verify the new behavior. This requires making tests
> depend on libwebp to use WebPGetFeatures, since the Skia API does not
> provide a way to determine whether an encoded webp file was encoded
> lossless-ly or lossily.
>
> Bug: skia:8586
> Change-Id: Ie9e09c2f7414ab701d696c4ad9edf405868a716f
> Reviewed-on: https://skia-review.googlesource.com/c/175823
> Commit-Queue: Leon Scroggins <scroggo@google.com>
> Reviewed-by: Derek Sollenberger <djsollen@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
TBR=reed@google.com, based on prior approval
Bug: skia:8586
Change-Id: I09c73f71996422f797fd9456fef5dfad9af36839
Reviewed-on: https://skia-review.googlesource.com/c/194194
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
Auto-Submit: Leon Scroggins <scroggo@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 5280503..1d3bf7c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1579,6 +1579,7 @@
"modules/skottie:tests",
"modules/sksg:tests",
"//third_party/libpng",
+ "//third_party/libwebp",
"//third_party/zlib",
]
public_deps = [