Move implementation of WebFilterOperations into cc

cc/output/filter_operation.h

+// Copyright 2013 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.
+
+#ifndef CC_OUTPUT_FILTER_OPERATION_H_
+#define CC_OUTPUT_FILTER_OPERATION_H_
+
+#include "base/logging.h"
+#include "cc/base/cc_export.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkScalar.h"
+#include "ui/gfx/point.h"
+
+namespace cc {
+
+class CC_EXPORT FilterOperation {
+ public:
+  enum FilterType {
+    GRAYSCALE,
+    SEPIA,
+    SATURATE,
+    HUE_ROTATE,
+    INVERT,
+    BRIGHTNESS,
+    CONTRAST,
+    OPACITY,
+    BLUR,
+    DROP_SHADOW,
+    COLOR_MATRIX,
+    ZOOM,
+    SATURATING_BRIGHTNESS,  // Not used in CSS/SVG.
+  };
+
+  FilterType type() const { return type_; }
+
+  float amount() const {
+    DCHECK_NE(type_, COLOR_MATRIX);
+    return amount_;
+  }
+
+  gfx::Point drop_shadow_offset() const {
+    DCHECK_EQ(type_, DROP_SHADOW);
+    return drop_shadow_offset_;
+  }
+
+  SkColor drop_shadow_color() const {
+    DCHECK_EQ(type_, DROP_SHADOW);
+    return drop_shadow_color_;
+  }
+
+  const SkScalar* matrix() const {
+    DCHECK_EQ(type_, COLOR_MATRIX);
+    return matrix_;
+  }
+
+  int zoom_inset() const {
+    DCHECK_EQ(type_, ZOOM);
+    return zoom_inset_;
+  }
+
+  static FilterOperation CreateGrayscaleFilter(float amount) {
+    return FilterOperation(GRAYSCALE, amount);
+  }
+
+  static FilterOperation CreateSepiaFilter(float amount) {
+    return FilterOperation(SEPIA, amount);
+  }
+
+  static FilterOperation CreateSaturateFilter(float amount) {
+    return FilterOperation(SATURATE, amount);
+  }
+
+  static FilterOperation CreateHueRotateFilter(float amount) {
+    return FilterOperation(HUE_ROTATE, amount);
+  }
+
+  static FilterOperation CreateInvertFilter(float amount) {
+    return FilterOperation(INVERT, amount);
+  }
+
+  static FilterOperation CreateBrightnessFilter(float amount) {
+    return FilterOperation(BRIGHTNESS, amount);
+  }
+
+  static FilterOperation CreateContrastFilter(float amount) {
+    return FilterOperation(CONTRAST, amount);
+  }
+
+  static FilterOperation CreateOpacityFilter(float amount) {
+    return FilterOperation(OPACITY, amount);
+  }
+
+  static FilterOperation CreateBlurFilter(float amount) {
+    return FilterOperation(BLUR, amount);
+  }
+
+  static FilterOperation CreateDropShadowFilter(gfx::Point offset,
+                                                float std_deviation,
+                                                SkColor color) {
+    return FilterOperation(DROP_SHADOW, offset, std_deviation, color);
+  }
+
+  static FilterOperation CreateColorMatrixFilter(SkScalar matrix[20]) {
+    return FilterOperation(COLOR_MATRIX, matrix);
+  }
+
+  static FilterOperation CreateZoomFilter(float amount, int inset) {
+    return FilterOperation(ZOOM, amount, inset);
+  }
+
+  static FilterOperation CreateSaturatingBrightnessFilter(float amount) {
+    return FilterOperation(SATURATING_BRIGHTNESS, amount);
+  }
+
+  bool operator==(const FilterOperation& other) const;
+
+  bool operator!=(const FilterOperation& other) const {
+    return !(*this == other);
+  }
+
+  // Methods for restoring a FilterOperation.
+  static FilterOperation CreateEmptyFilter() {
+    return FilterOperation(GRAYSCALE, 0.f);
+  }
+
+  void set_type(FilterType type) { type_ = type; }
+
+  void set_amount(float amount) {
+    DCHECK_NE(type_, COLOR_MATRIX);
+    amount_ = amount;
+  }
+
+  void set_drop_shadow_offset(gfx::Point offset) {
+    DCHECK_EQ(type_, DROP_SHADOW);
+    drop_shadow_offset_ = offset;
+  }
+
+  void set_drop_shadow_color(SkColor color) {
+    DCHECK_EQ(type_, DROP_SHADOW);
+    drop_shadow_color_ = color;
+  }
+
+  void set_matrix(const SkScalar matrix[20]) {
+    DCHECK_EQ(type_, COLOR_MATRIX);
+    for (unsigned i = 0; i < 20; ++i)
+      matrix_[i] = matrix[i];
+  }
+
+  void set_zoom_inset(int inset) {
+    DCHECK_EQ(type_, ZOOM);
+    zoom_inset_ = inset;
+  }
+
+ private:
+  FilterOperation(FilterType type, float amount);
+
+  FilterOperation(FilterType type,
+                  gfx::Point offset,
+                  float stdDeviation,
+                  SkColor color);
+
+  FilterOperation(FilterType, SkScalar matrix[20]);
+
+  FilterOperation(FilterType type, float amount, int inset);
+
+  FilterType type_;
+  float amount_;
+  gfx::Point drop_shadow_offset_;
+  SkColor drop_shadow_color_;
+  SkScalar matrix_[20];
+  int zoom_inset_;
+};
+
+}  // namespace cc
+
+#endif  // CC_OUTPUT_FILTER_OPERATION_H_