skia2/gn
Cary Clark 1ea5656a28 Revert "Base Gradient FP Refactor"
This reverts commit 10f7a1e075.

Reason for revert: broke google3 roll
Original change's description:
> Base Gradient FP Refactor
> 
> --
> 
> Redefines how gradients will be written in the GPU back-end:
> 
> They are split into three fragment processor components: master, layout, and colorizer.
> The layout FP is responsible for converting the fragment position into an interpolant value, t.
> Each high-level gradient--such as linear, radial, etc.--are implemented solely in a layout FP.
> The colorizer FP is responsible for converting t into a color.
> The master FP invokes the layout, clamps t into the proper domain, and then invokes the colorizer.
> GrGradientShader provides factory functions to create FP graphs from SkGradientShader instances.
> This pattern is documented in gpu/gradients/README.md.
> 
> Goals for current CL
> ====================
> 
> Outline the FP components by providing .fp implementations for the simplest gradients.
> Defines a two-color single interval colorizer and a linear gradient layout, and the master effect.
> A MakeLinear() factory function is provided that can convert SkGradientShaders that fit these constraints.
> SkLinearGradient first attempts to use the new system, falling back to the original GrGradientEffect.
> 
> Future CLs
> ==========
> 
> To keep the CL reviews manageable, additional dependent CLs will be added that gradually replace past functionality.
> A CL for each layout will be defined.
> CLs for the different analytic colorizer cases and the textured gradient case will be defined.
> Once the new system supports all current layouts and colorizer capabilities, all old GPU gradient code will be removed.
> After this clean-up, analytic colorization can hopefully be expanded to reduce the usage of textured gradients.
> 
> Bug: skia:
> Change-Id: Iafe7b8b4071491a71c473babcd7bedda659150c1
> Reviewed-on: https://skia-review.googlesource.com/148120
> Commit-Queue: Michael Ludwig <michaelludwig@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>

TBR=bsalomon@google.com,michaelludwig@google.com

Change-Id: Ib735e323795ac8874cb00b007a915786b50517a6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/153600
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>
2018-09-11 15:51:56 +00:00
..
toolchain link with --start-group/--end-group 2018-08-07 16:18:01 +00:00
__init__.py Make gn directory importable in python 2017-03-20 17:40:30 +00:00
ar.py GN: quiet alink spam on Mac 2016-11-07 14:19:32 +00:00
bench.gni ccpr: Rename GrCCPathParser to GrCCFiller 2018-08-20 20:25:24 +00:00
BUILD.gn drop warnings and -Werror from is_official_builds 2018-09-04 15:46:42 +00:00
BUILDCONFIG.gn drop warnings and -Werror from is_official_builds 2018-09-04 15:46:42 +00:00
call.py Add gn plumbing for mdbviz tool 2017-09-05 13:57:44 +00:00
checkdir.py Bundle resources and skps directories into iOS app. 2017-11-29 17:06:25 +00:00
codesign_ios.py Allow different identities for iOS code signing 2017-12-07 20:42:00 +00:00
compile_processors.py switched to infra version of clang-format for skslc 2017-07-27 20:28:50 +00:00
core.gni Remove SkImageCacherator entirely 2018-09-11 14:24:32 +00:00
cp.py GN: get Angle compiling on Windows. 2016-10-17 16:16:16 +00:00
create_sksl_enums.py Create sksl_enums.inc with UNIX line endings (even on Windows) 2018-02-09 15:13:11 +00:00
effects_imagefilters.gni move blurimagefilter.cpp back into effects 2018-06-26 15:01:52 +00:00
effects.gni add new patheffects 2018-07-18 18:56:07 +00:00
find_headers.py Add 'public' headers support to find_headers.py 2018-05-30 18:00:09 +00:00
find_ios_sysroot.py Add iOS simulator support in GN. 2017-03-13 17:21:43 +00:00
flutter_defines.gni Revert "Revert "add flag to soften the blow of removing a legacy api for flutter"" 2018-09-07 20:58:54 +00:00
gen_plist_ios.py Add create_bundle support for GN 2017-11-28 15:29:07 +00:00
gm.gni Preseve tangents when converting cubics->quads in GrAAHairlinePathRenderer 2018-09-07 20:21:24 +00:00
gn_meta_sln.py Decorate project names with their relative path in the meta SLN 2018-06-01 19:22:08 +00:00
gn_to_bp_utils.py Disable module deps in Android Framework builds 2018-06-11 15:00:31 +00:00
gn_to_bp.py add src/opts headers to .gni files 2018-09-05 20:31:09 +00:00
gn_to_cmake.py Improve CMakeLists.txt auto regeneration. 2018-06-26 20:33:29 +00:00
gpu.gni Revert "Base Gradient FP Refactor" 2018-09-11 15:51:56 +00:00
highest_version_dir.py Filter Windows SDK and Compiler directories 2017-12-11 20:26:08 +00:00
is_clang.py GN: match shell behavior for cc and cxx in is_clang.py 2016-09-27 09:29:24 -07:00
opts.gni add src/opts headers to .gni files 2018-09-05 20:31:09 +00:00
pdf.gni SkPDF/Clusterator: expose to the light of a unit test 2018-03-29 20:32:15 +00:00
push_to_android.py skia_android_serial = "auto" 2017-01-12 16:30:17 +00:00
run_sksllex.py Re-land "converted OverdrawColorFilter to SkSL" 2017-10-26 14:58:27 +00:00
samples.gni add circles to stroked cubics with cusps 2018-08-31 19:55:44 +00:00
shared_sources.gni move imagefilters into separate dir and flag for build.gn 2018-06-19 20:16:38 +00:00
sksl.gni Revert "Base Gradient FP Refactor" 2018-09-11 15:51:56 +00:00
tests.gni Reland "Switch SkCodec to use skcms plus fixes"" 2018-08-27 16:16:14 +00:00
utils.gni textonpath util 2018-08-27 18:01:21 +00:00
xps.gni SkXPS: new document API. 2017-02-06 19:00:28 +00:00