Revert "Add stub gpu workaround generators"

This reverts commit 94d25b970b97c68ddd0b4ceb71f2233aac05e6b5.

Reason for revert: Breaking the Chromium roll

Original change's description:
> Add stub gpu workaround generators
> 
> Like https://chromium-review.googlesource.com/c/chromium/src/+/1005362,
> this patch adds a way for Chrome and Skia to share a set of driver
> workaround names so that they can be turned on by Chrome (or Skia) as
> needed.
> 
> To avoid weird cross-repository dependencies, the generator script is
> duplicated in Skia.
> 
> This patch just adds a few dummy workaround names to make sure the build
> process is working.  The followup to this is to add workaround init
> to GrContext/GrContextOptions and to start implementing individual
> workarounds.
> 
> Implementing these workarounds is to support Chrome's "out of process
> raster" which will use Ganesh without a command buffer, and so will not
> have the workarounds that the command buffer provides.
> 
> Bug: chromium:829614
> Change-Id: I40745a777a95805995991fedb81657ae418b52d9
> Reviewed-on: https://skia-review.googlesource.com/120608
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Adrienne Walker <enne@chromium.org>

TBR=bsalomon@google.com,enne@chromium.org

Change-Id: Ie0b69d7d028dabca1fd70813b6920386c8838247
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:829614
Reviewed-on: https://skia-review.googlesource.com/122240
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>

7 files changed, 1 insertions, 194 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 3644a8a1c5..ff6cc1b9fe 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -46,7 +46,6 @@ declare_args() {
   skia_vulkan_sdk = getenv("VULKAN_SDK")
   skia_qt_path = getenv("QT_PATH")
   skia_compile_processors = false
-  skia_generate_workarounds = false
   skia_lex = false
 
   skia_skqp_enable_driver_correctness_workarounds = false
@@ -585,9 +584,6 @@ optional("gpu") {
     ":compile_processors",
     ":run_sksllex",
   ]
-  if (skia_generate_workarounds) {
-    deps += [ ":workaround_list" ]
-  }
   public_defines = []
 
   sources = skia_gpu_sources + skia_sksl_sources + skia_gpu_processor_outputs
@@ -693,7 +689,7 @@ optional("pdf") {
     "//third_party/zlib",
   ]
   if (skia_use_libjpeg_turbo) {
-    deps += [ ":jpeg" ]
+    deps += [ ":jpeg"]
   }
   sources = skia_pdf_sources
   sources_when_disabled = [ "src/pdf/SkDocument_PDF_None.cpp" ]
@@ -792,32 +788,6 @@ optional("xml") {
   ]
 }
 
-if (skia_enable_gpu && skia_generate_workarounds) {
-  action("workaround_list") {
-    script = "tools/build_workaround_header.py"
-
-    inputs = [
-      "src/gpu/gpu_workaround_list.txt",
-    ]
-
-    # see comments in skia_compile_processors about out dir path shenanigans.
-    output_file =
-        rebase_path("src/gpu/GrDriverBugWorkaroundsAutogen.h", root_out_dir)
-
-    outputs = [
-      "$root_out_dir/$output_file",
-    ]
-    args = [
-      "--output-file",
-      "$output_file",
-    ]
-
-    foreach(file, inputs) {
-      args += [ rebase_path(file, root_build_dir) ]
-    }
-  }
-}
-
 component("skia") {
   public_configs = [ ":skia_public" ]
   configs += skia_library_configs
diff --git a/gn/gpu.gni b/gn/gpu.gni
index 31035ff32d..913270dd43 100644
--- a/gn/gpu.gni
+++ b/gn/gpu.gni
@@ -86,8 +86,6 @@ skia_gpu_sources = [
   "$_src/gpu/GrDrawOpAtlas.h",
   "$_src/gpu/GrDrawOpTest.cpp",
   "$_src/gpu/GrDrawOpTest.h",
-  "$_src/gpu/GrDriverBugWorkarounds.cpp",
-  "$_src/gpu/GrDriverBugWorkarounds.h",
   "$_src/gpu/GrFixedClip.cpp",
   "$_src/gpu/GrFixedClip.h",
   "$_src/gpu/GrFragmentProcessor.cpp",
diff --git a/src/gpu/GrDriverBugWorkarounds.cpp b/src/gpu/GrDriverBugWorkarounds.cpp
deleted file mode 100644
index 5ed9d8d2ef..0000000000
--- a/src/gpu/GrDriverBugWorkarounds.cpp
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright 2018 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "GrDriverBugWorkarounds.h"
-
-#include "SkTypes.h"
-
-GrDriverBugWorkarounds::GrDriverBugWorkarounds() = default;
-
-GrDriverBugWorkarounds::GrDriverBugWorkarounds(
-        const std::vector<int>& enabled_driver_bug_workarounds) {
-    for (auto id : enabled_driver_bug_workarounds) {
-        switch (id) {
-#define GPU_OP(type, name)                        \
-            case GrDriverBugWorkaroundType::type: \
-                name = true;                      \
-                break;
-
-            GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
-#undef GPU_OP
-            default:
-                SK_ABORT("Not implemented");
-                break;
-        }
-    }
-}
-
-GrDriverBugWorkarounds::~GrDriverBugWorkarounds() = default;
diff --git a/src/gpu/GrDriverBugWorkarounds.h b/src/gpu/GrDriverBugWorkarounds.h
deleted file mode 100644
index bca5dc99f1..0000000000
--- a/src/gpu/GrDriverBugWorkarounds.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright 2018 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef GrDriverBugWorkarounds_DEFINED
-#define GrDriverBugWorkarounds_DEFINED
-
-// External embedders of Skia can override this to use their own list
-// of workaround names.
-#ifdef SK_GPU_WORKAROUNDS_HEADER
-#include SK_GPU_WORKAROUNDS_HEADER
-#else
-// To regenerate this file, set gn arg "skia_generate_workarounds = true".
-// This is not rebuilt by default to avoid embedders having to have extra
-// build steps.
-#include "GrDriverBugWorkaroundsAutogen.h"
-#endif
-
-#include <stdint.h>
-#include <vector>
-
-enum GrDriverBugWorkaroundType {
-#define GPU_OP(type, name) type,
-  GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
-#undef GPU_OP
-  NUMBER_OF_GPU_DRIVER_BUG_WORKAROUND_TYPES
-};
-
-class GrDriverBugWorkarounds {
- public:
-  GrDriverBugWorkarounds();
-  explicit GrDriverBugWorkarounds(const std::vector<int32_t>& workarounds);
-
-  ~GrDriverBugWorkarounds();
-
-#define GPU_OP(type, name) bool name = false;
-  GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
-#undef GPU_OP
-};
-
-#endif
diff --git a/src/gpu/GrDriverBugWorkaroundsAutogen.h b/src/gpu/GrDriverBugWorkaroundsAutogen.h
deleted file mode 100644
index 4ff99bb98c..0000000000
--- a/src/gpu/GrDriverBugWorkaroundsAutogen.h
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2018 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This file is auto-generated from
-//    ../../tools/build_workaround_header.py
-// DO NOT EDIT!
-
-#define GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)\
-  GPU_OP(AVOID_STENCIL_BUFFERS,       \
-         avoid_stencil_buffers)       \
-  GPU_OP(CLEAR_TO_ZERO_OR_ONE_BROKEN, \
-         clear_to_zero_or_one_broken) \
-// The End
diff --git a/src/gpu/gpu_workaround_list.txt b/src/gpu/gpu_workaround_list.txt
deleted file mode 100644
index 89a7231e9c..0000000000
--- a/src/gpu/gpu_workaround_list.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-avoid_stencil_buffers
-clear_to_zero_or_one_broken
diff --git a/tools/build_workaround_header.py b/tools/build_workaround_header.py
deleted file mode 100755
index b8558326ad..0000000000
--- a/tools/build_workaround_header.py
+++ /dev/null
@@ -1,69 +0,0 @@
-#!/usr/bin/env python
-# Copyright (c) 2018 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-"""code generator for gpu workaround definitions"""
-
-import os
-import os.path
-import sys
-from optparse import OptionParser
-
-_LICENSE = """// Copyright 2018 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-"""
-
-_DO_NOT_EDIT_WARNING = ("// This file is auto-generated from\n" +
-  "//    " + __file__ + "\n" +
-  "// DO NOT EDIT!\n\n")
-
-def merge_files_into_workarounds(files):
-  workarounds = set()
-  for filename in files:
-    with open(filename, 'r') as f:
-      workarounds.update([workaround.strip() for workaround in f])
-  return sorted(list(workarounds))
-
-
-def write_header(filename, workarounds):
-  max_workaround_len = len(max(workarounds, key=len))
-
-  with open(filename, 'w') as f:
-    f.write(_LICENSE)
-    f.write(_DO_NOT_EDIT_WARNING)
-
-    indent = '  '
-    macro = 'GPU_OP'
-
-    # length of max string passed to write + 1
-    max_len = len(indent) + len(macro) + 1 + max_workaround_len + 1 + 1
-    write = lambda line: f.write(line + ' ' * (max_len - len(line)) + '\\\n')
-
-    write('#define GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)')
-    for w in workarounds:
-      write(indent + macro + '(' + w.upper() + ',')
-      write(indent + ' ' * (len(macro) + 1) + w + ')')
-
-    # one extra line to consume the the last \
-    f.write('// The End\n')
-
-
-def main(argv):
-  usage = "usage: %prog [options] file1 file2 file3 etc"
-  parser = OptionParser(usage=usage)
-  parser.add_option(
-      "--output-file",
-      dest="output_file",
-      default="gpu_driver_bug_workaround_autogen.h",
-      help="the name of the header file to write")
-
-  (options, _) = parser.parse_args(args=argv)
-
-  workarounds = merge_files_into_workarounds(parser.largs)
-  write_header(options.output_file, workarounds)
-
-
-if __name__ == '__main__':
-  sys.exit(main(sys.argv[1:]))