skia2/fuzz
Michael Ludwig 7d0f853158 Add SkImageFilters::Shader in place of Paint factory
SkImageFilters::Paint did not use every slot of the SkPaint, with only
its color, alpha, color filter, and shader having a meaningful effect on
the image filter result. It was always blended into a transparent dst,
so blend mode wasn't very relevant, and it was always filled to whatever
required geometry, so stroke style, path effect, and mask filters were
ignored or not well specified.

Color, alpha, and color filter can all be combined into an SkShader, so
a more constrained SkImageFilters::Shader provides the same useful
capabilities without as many surprises.

SkImageFilters::Paint still exists, but is deprecated to be removed
once I've confirmed clients aren't depending on it.

Bug: skia:9310
Change-Id: I11a82bda1a5d440726cf4e2b5bfaae4929568679
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323680
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
2020-10-08 22:51:13 +00:00
..
oss_fuzz [fuzz] Make libfuzzer defines backwards compatible for roll 2020-09-14 17:43:00 +00:00
coverage remove SkColorSpace::MakeICC() fuzzer 2018-05-23 16:31:11 +00:00
Fuzz.cpp rewrite includes to not need so much -Ifoo 2019-04-24 16:27:11 +00:00
Fuzz.h don't create out of range enums 2019-12-12 16:04:45 +00:00
FuzzCanvas.cpp Add SkImageFilters::Shader in place of Paint factory 2020-10-08 22:51:13 +00:00
FuzzCommon.cpp Revert "Revert "move onto new factories for SkMatrix"" 2020-05-21 16:58:39 +00:00
FuzzCommon.h rewrite includes to not need so much -Ifoo 2019-04-24 16:27:11 +00:00
FuzzCreateDDL.cpp Handle null GrDirectContext in DDL Fuzzer 2020-07-31 18:12:53 +00:00
FuzzDrawFunctions.cpp rewrite includes to not need so much -Ifoo 2019-04-24 16:27:11 +00:00
FuzzEncoders.cpp Add GrDirectContext arg to SkImage::readPixels 2020-08-27 19:26:29 +00:00
FuzzGradients.cpp rewrite includes to not need so much -Ifoo 2019-04-24 16:27:11 +00:00
FuzzMain.cpp Enable ClangTidy check readability-redundant-smartptr-get. 2020-08-16 15:56:48 +00:00
FuzzParsePath.cpp rewrite includes to not need so much -Ifoo 2019-04-24 16:27:11 +00:00
FuzzPath.cpp add SKPath::readFromMemory() fuzzer 2020-08-12 17:40:16 +00:00
FuzzPathMeasure.cpp [fuzz] Standardize, document, and backport fuzzing defines. 2020-09-14 13:36:10 +00:00
FuzzPathop.cpp Revert "Revert "switch to new filltype for SkPath"" 2019-11-26 17:43:14 +00:00
FuzzPolyUtils.cpp Move SkImageFilter functionality into private SkImageFilter_Base 2019-08-02 18:56:39 +00:00
FuzzRegionOp.cpp rewrite includes to not need so much -Ifoo 2019-04-24 16:27:11 +00:00
FuzzRRect.cpp add SkRRect::readFromMemory() fuzzer 2020-08-11 20:26:28 +00:00
README.md [fuzz] Standardize, document, and backport fuzzing defines. 2020-09-14 13:36:10 +00:00

We fuzz Skia using oss-fuzz, which in turn uses fuzzing engines such as libfuzzer, afl-fuzz, hong-fuzz and others.

We define a fuzzer to be a targeted bit of code that takes a randomized input and executes code in a specific area. For example, we have a codec fuzzer which takes a mutated png/jpeg or similar file and attempts to turn it into an SkImage. We also have a canvas fuzzer which takes in a random set of bytes and turns them into calls on SkCanvas.

See [../site/dev/testing/fuzz.md] for more information on building and running fuzzers.

See also: