Reland "Add driver bug workarounds to GrCaps"

This is a reland of 328490c6a1625ce51d0e81688e0c85c79c400d86

Original change's description:
> Add driver bug workarounds to GrCaps
> 
> This moves GrDriverBugWorkarounds to include so that it can be included
> by GrCaps.  This also makes GrContextOptions a nearly empty class in
> the case of !SK_SUPPORT_GPU so that non-gpu builds don't need to build
> in GrDriverBugWorkarounds.cpp.
> 
> Bug: chromium: 829614
> Change-Id: Iedf73677fd09e9a487cfe618a696fd4b25c8703d
> Reviewed-on: https://skia-review.googlesource.com/126581
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Adrienne Walker <enne@chromium.org>

Bug: chromium: 829614
Change-Id: I7b539f99caa3032c8c595dd5068dc3b179747ccd
Reviewed-on: https://skia-review.googlesource.com/127304
Commit-Queue: Adrienne Walker <enne@chromium.org>
Reviewed-by: Brian Salomon <bsalomon@google.com>

3 files changed, 73 insertions, 0 deletions

diff --git a/include/gpu/GrContextOptions.h b/include/gpu/GrContextOptions.h
index 3a0fba1adb..eea7771075 100644
--- a/include/gpu/GrContextOptions.h
+++ b/include/gpu/GrContextOptions.h
@@ -12,11 +12,13 @@
 #include "SkTypes.h"
 #include "GrTypes.h"
 #include "../private/GrTypesPriv.h"
+#include "GrDriverBugWorkarounds.h"
 
 #include <vector>
 
 class SkExecutor;
 
+#if SK_SUPPORT_GPU
 struct GrContextOptions {
     enum class Enable {
         /** Forces an option to be disabled. */
@@ -239,6 +241,13 @@ struct GrContextOptions {
      */
     Enable fDistanceFieldGlyphVerticesAlwaysHaveW = Enable::kDefault;
 #endif
+
+    GrDriverBugWorkarounds fDriverBugWorkarounds;
+};
+#else
+struct GrContextOptions {
+    struct PersistentCache {};
 };
+#endif
 
 #endif
diff --git a/include/gpu/GrDriverBugWorkarounds.h b/include/gpu/GrDriverBugWorkarounds.h
new file mode 100644
index 0000000000..31f6df5a33
--- /dev/null
+++ b/include/gpu/GrDriverBugWorkarounds.h
@@ -0,0 +1,51 @@
+/*
+ * 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 "SkTypes.h"
+
+#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 SK_API GrDriverBugWorkarounds {
+ public:
+  GrDriverBugWorkarounds();
+  explicit GrDriverBugWorkarounds(const std::vector<int32_t>& workarounds);
+
+  GrDriverBugWorkarounds& operator=(const GrDriverBugWorkarounds&) = default;
+
+  // Turn on any workarounds listed in |workarounds| (but don't turn any off).
+  void applyOverrides(const GrDriverBugWorkarounds& workarounds);
+
+  ~GrDriverBugWorkarounds();
+
+#define GPU_OP(type, name) bool name = false;
+  GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
+#undef GPU_OP
+};
+
+#endif
diff --git a/include/gpu/GrDriverBugWorkaroundsAutogen.h b/include/gpu/GrDriverBugWorkaroundsAutogen.h
new file mode 100644
index 0000000000..87aa46172e
--- /dev/null
+++ b/include/gpu/GrDriverBugWorkaroundsAutogen.h
@@ -0,0 +1,13 @@
+// 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 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