cc: Move SkShader construction to a single spot in PaintShader

cc/paint/paint_shader.cc

+// Copyright 2017 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.
+
+#include "cc/paint/paint_shader.h"
+
+#include "base/memory/ptr_util.h"
+#include "cc/paint/paint_record.h"
+#include "third_party/skia/include/effects/SkGradientShader.h"
+
+namespace cc {
+
+std::unique_ptr<PaintShader> PaintShader::MakeColor(SkColor color) {
+  return base::WrapUnique(new PaintShader(nullptr, color));
+}
+
+std::unique_ptr<PaintShader> PaintShader::MakeLinearGradient(
+    const SkPoint points[],
+    const SkColor colors[],
+    const SkScalar pos[],
+    int count,
+    SkShader::TileMode mode,
+    uint32_t flags,
+    const SkMatrix* local_matrix,
+    SkColor fallback_color) {
+  return base::WrapUnique(
+      new PaintShader(SkGradientShader::MakeLinear(points, colors, pos, count,
+                                                   mode, flags, local_matrix),
+                      fallback_color));
+}
+
+std::unique_ptr<PaintShader> PaintShader::MakeRadialGradient(
+    const SkPoint& center,
+    SkScalar radius,
+    const SkColor colors[],
+    const SkScalar pos[],
+    int color_count,
+    SkShader::TileMode mode,
+    uint32_t flags,
+    const SkMatrix* local_matrix,
+    SkColor fallback_color) {
+  return base::WrapUnique(new PaintShader(
+      SkGradientShader::MakeRadial(center, radius, colors, pos, color_count,
+                                   mode, flags, local_matrix),
+      fallback_color));
+}
+
+std::unique_ptr<PaintShader> PaintShader::MakeTwoPointConicalGradient(
+    const SkPoint& start,
+    SkScalar start_radius,
+    const SkPoint& end,
+    SkScalar end_radius,
+    const SkColor colors[],
+    const SkScalar pos[],
+    int color_count,
+    SkShader::TileMode mode,
+    uint32_t flags,
+    const SkMatrix* local_matrix,
+    SkColor fallback_color) {
+  return base::WrapUnique(
+      new PaintShader(SkGradientShader::MakeTwoPointConical(
+                          start, start_radius, end, end_radius, colors, pos,
+                          color_count, mode, flags, local_matrix),
+                      fallback_color));
+}
+
+std::unique_ptr<PaintShader> PaintShader::MakeSweepGradient(
+    SkScalar cx,
+    SkScalar cy,
+    const SkColor colors[],
+    const SkScalar pos[],
+    int color_count,
+    uint32_t flags,
+    const SkMatrix* local_matrix,
+    SkColor fallback_color) {
+  return base::WrapUnique(new PaintShader(
+      SkGradientShader::MakeSweep(cx, cy, colors, pos, color_count, flags,
+                                  local_matrix),
+      fallback_color));
+}
+
+std::unique_ptr<PaintShader> PaintShader::MakeImage(
+    sk_sp<const SkImage> image,
+    SkShader::TileMode tx,
+    SkShader::TileMode ty,
+    const SkMatrix* local_matrix) {
+  return base::WrapUnique(new PaintShader(
+      image->makeShader(tx, ty, local_matrix), SK_ColorTRANSPARENT));
+}
+
+std::unique_ptr<PaintShader> PaintShader::MakePaintRecord(
+    sk_sp<PaintRecord> record,
+    const SkRect& tile,
+    SkShader::TileMode tx,
+    SkShader::TileMode ty,
+    const SkMatrix* local_matrix) {
+  return base::WrapUnique(new PaintShader(
+      SkShader::MakePictureShader(ToSkPicture(std::move(record), tile), tx, ty,
+                                  local_matrix, nullptr),
+      SK_ColorTRANSPARENT));
+}
+
+PaintShader::PaintShader(sk_sp<SkShader> shader, SkColor fallback_color)
+    : sk_shader_(shader ? std::move(shader)
+                        : SkShader::MakeColorShader(fallback_color)) {
+  DCHECK(sk_shader_);
+}
+PaintShader::PaintShader(const PaintShader& other) = default;
+PaintShader::PaintShader(PaintShader&& other) = default;
+PaintShader::~PaintShader() = default;
+
+PaintShader& PaintShader::operator=(const PaintShader& other) = default;
+PaintShader& PaintShader::operator=(PaintShader&& other) = default;
+
+}  // namespace cc