cc/output/filter_operation.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <algorithm>
   6
   7 #include "base/values.h"
   8 #include "cc/base/math_util.h"
   9 #include "cc/output/filter_operation.h"
  10 #include "third_party/skia/include/core/SkMath.h"
  11 #include "ui/gfx/animation/tween.h"
  12
  13 namespace cc {
  14
  15 bool FilterOperation::operator==(const FilterOperation& other) const {
  16   if (type_ != other.type_)
  17     return false;
  18   if (type_ == COLOR_MATRIX)
  19     return !memcmp(matrix_, other.matrix_, sizeof(matrix_));
  20   if (type_ == DROP_SHADOW) {
  21     return amount_ == other.amount_ &&
  22            drop_shadow_offset_ == other.drop_shadow_offset_ &&
  23            drop_shadow_color_ == other.drop_shadow_color_;
  24   }
  25   if (type_ == REFERENCE)
  26     return image_filter_.get() == other.image_filter_.get();
  27   return amount_ == other.amount_;
  28 }
  29
  30 FilterOperation::FilterOperation(FilterType type, float amount)
  31     : type_(type),
  32       amount_(amount),
  33       drop_shadow_offset_(0, 0),
  34       drop_shadow_color_(0),
  35       zoom_inset_(0) {
  36   DCHECK_NE(type_, DROP_SHADOW);
  37   DCHECK_NE(type_, COLOR_MATRIX);
  38   DCHECK_NE(type_, REFERENCE);
  39   memset(matrix_, 0, sizeof(matrix_));
  40 }
  41
  42 FilterOperation::FilterOperation(FilterType type,
  43                                  const gfx::Point& offset,
  44                                  float stdDeviation,
  45                                  SkColor color)
  46     : type_(type),
  47       amount_(stdDeviation),
  48       drop_shadow_offset_(offset),
  49       drop_shadow_color_(color),
  50       zoom_inset_(0) {
  51   DCHECK_EQ(type_, DROP_SHADOW);
  52   memset(matrix_, 0, sizeof(matrix_));
  53 }
  54
  55 FilterOperation::FilterOperation(FilterType type, SkScalar matrix[20])
  56     : type_(type),
  57       amount_(0),
  58       drop_shadow_offset_(0, 0),
  59       drop_shadow_color_(0),
  60       zoom_inset_(0) {
  61   DCHECK_EQ(type_, COLOR_MATRIX);
  62   memcpy(matrix_, matrix, sizeof(matrix_));
  63 }
  64
  65 FilterOperation::FilterOperation(FilterType type, float amount, int inset)
  66     : type_(type),
  67       amount_(amount),
  68       drop_shadow_offset_(0, 0),
  69       drop_shadow_color_(0),
  70       zoom_inset_(inset) {
  71   DCHECK_EQ(type_, ZOOM);
  72   memset(matrix_, 0, sizeof(matrix_));
  73 }
  74
  75 FilterOperation::FilterOperation(
  76     FilterType type,
  77     const skia::RefPtr<SkImageFilter>& image_filter)
  78     : type_(type),
  79       amount_(0),
  80       drop_shadow_offset_(0, 0),
  81       drop_shadow_color_(0),
  82       image_filter_(image_filter),
  83       zoom_inset_(0) {
  84   DCHECK_EQ(type_, REFERENCE);
  85   memset(matrix_, 0, sizeof(matrix_));
  86 }
  87
  88 FilterOperation::FilterOperation(const FilterOperation& other)
  89     : type_(other.type_),
  90       amount_(other.amount_),
  91       drop_shadow_offset_(other.drop_shadow_offset_),
  92       drop_shadow_color_(other.drop_shadow_color_),
  93       image_filter_(other.image_filter_),
  94       zoom_inset_(other.zoom_inset_) {
  95   memcpy(matrix_, other.matrix_, sizeof(matrix_));
  96 }
  97
  98 FilterOperation::~FilterOperation() {
  99 }
 100
 101 static FilterOperation CreateNoOpFilter(FilterOperation::FilterType type) {
 102   switch (type) {
 103     case FilterOperation::GRAYSCALE:
 104       return FilterOperation::CreateGrayscaleFilter(0.f);
 105     case FilterOperation::SEPIA:
 106       return FilterOperation::CreateSepiaFilter(0.f);
 107     case FilterOperation::SATURATE:
 108       return FilterOperation::CreateSaturateFilter(1.f);
 109     case FilterOperation::HUE_ROTATE:
 110       return FilterOperation::CreateHueRotateFilter(0.f);
 111     case FilterOperation::INVERT:
 112       return FilterOperation::CreateInvertFilter(0.f);
 113     case FilterOperation::BRIGHTNESS:
 114       return FilterOperation::CreateBrightnessFilter(1.f);
 115     case FilterOperation::CONTRAST:
 116       return FilterOperation::CreateContrastFilter(1.f);
 117     case FilterOperation::OPACITY:
 118       return FilterOperation::CreateOpacityFilter(1.f);
 119     case FilterOperation::BLUR:
 120       return FilterOperation::CreateBlurFilter(0.f);
 121     case FilterOperation::DROP_SHADOW:
 122       return FilterOperation::CreateDropShadowFilter(
 123           gfx::Point(0, 0), 0.f, SK_ColorTRANSPARENT);
 124     case FilterOperation::COLOR_MATRIX: {
 125       SkScalar matrix[20];
 126       memset(matrix, 0, 20 * sizeof(SkScalar));
 127       matrix[0] = matrix[6] = matrix[12] = matrix[18] = 1.f;
 128       return FilterOperation::CreateColorMatrixFilter(matrix);
 129     }
 130     case FilterOperation::ZOOM:
 131       return FilterOperation::CreateZoomFilter(1.f, 0);
 132     case FilterOperation::SATURATING_BRIGHTNESS:
 133       return FilterOperation::CreateSaturatingBrightnessFilter(0.f);
 134     case FilterOperation::REFERENCE:
 135       return FilterOperation::CreateReferenceFilter(
 136           skia::RefPtr<SkImageFilter>());
 137   }
 138   NOTREACHED();
 139   return FilterOperation::CreateEmptyFilter();
 140 }
 141
 142 static float ClampAmountForFilterType(float amount,
 143                                       FilterOperation::FilterType type) {
 144   switch (type) {
 145     case FilterOperation::GRAYSCALE:
 146     case FilterOperation::SEPIA:
 147     case FilterOperation::INVERT:
 148     case FilterOperation::OPACITY:
 149       return MathUtil::ClampToRange(amount, 0.f, 1.f);
 150     case FilterOperation::SATURATE:
 151     case FilterOperation::BRIGHTNESS:
 152     case FilterOperation::CONTRAST:
 153     case FilterOperation::BLUR:
 154     case FilterOperation::DROP_SHADOW:
 155       return std::max(amount, 0.f);
 156     case FilterOperation::ZOOM:
 157       return std::max(amount, 1.f);
 158     case FilterOperation::HUE_ROTATE:
 159     case FilterOperation::SATURATING_BRIGHTNESS:
 160       return amount;
 161     case FilterOperation::COLOR_MATRIX:
 162     case FilterOperation::REFERENCE:
 163       NOTREACHED();
 164       return amount;
 165   }
 166   NOTREACHED();
 167   return amount;
 168 }
 169
 170 // static
 171 FilterOperation FilterOperation::Blend(const FilterOperation* from,
 172                                        const FilterOperation* to,
 173                                        double progress) {
 174   FilterOperation blended_filter = FilterOperation::CreateEmptyFilter();
 175
 176   if (!from && !to)
 177     return blended_filter;
 178
 179   const FilterOperation& from_op = from ? *from : CreateNoOpFilter(to->type());
 180   const FilterOperation& to_op = to ? *to : CreateNoOpFilter(from->type());
 181
 182   if (from_op.type() != to_op.type())
 183     return blended_filter;
 184
 185   DCHECK(to_op.type() != FilterOperation::COLOR_MATRIX);
 186   blended_filter.set_type(to_op.type());
 187
 188   if (to_op.type() == FilterOperation::REFERENCE) {
 189     if (progress > 0.5)
 190       blended_filter.set_image_filter(to_op.image_filter());
 191     else
 192       blended_filter.set_image_filter(from_op.image_filter());
 193     return blended_filter;
 194   }
 195
 196   blended_filter.set_amount(ClampAmountForFilterType(
 197       gfx::Tween::FloatValueBetween(progress, from_op.amount(), to_op.amount()),
 198       to_op.type()));
 199
 200   if (to_op.type() == FilterOperation::DROP_SHADOW) {
 201     gfx::Point blended_offset(
 202         gfx::Tween::LinearIntValueBetween(progress,
 203                                           from_op.drop_shadow_offset().x(),
 204                                           to_op.drop_shadow_offset().x()),
 205         gfx::Tween::LinearIntValueBetween(progress,
 206                                           from_op.drop_shadow_offset().y(),
 207                                           to_op.drop_shadow_offset().y()));
 208     blended_filter.set_drop_shadow_offset(blended_offset);
 209     blended_filter.set_drop_shadow_color(gfx::Tween::ColorValueBetween(
 210         progress, from_op.drop_shadow_color(), to_op.drop_shadow_color()));
 211   } else if (to_op.type() == FilterOperation::ZOOM) {
 212     blended_filter.set_zoom_inset(
 213         std::max(gfx::Tween::LinearIntValueBetween(
 214                      from_op.zoom_inset(), to_op.zoom_inset(), progress),
 215                  0));
 216   }
 217
 218   return blended_filter;
 219 }
 220
 221 scoped_ptr<base::Value> FilterOperation::AsValue() const {
 222   scoped_ptr<base::DictionaryValue> value(new base::DictionaryValue);
 223   value->SetInteger("type", type_);
 224   switch (type_) {
 225     case FilterOperation::GRAYSCALE:
 226     case FilterOperation::SEPIA:
 227     case FilterOperation::SATURATE:
 228     case FilterOperation::HUE_ROTATE:
 229     case FilterOperation::INVERT:
 230     case FilterOperation::BRIGHTNESS:
 231     case FilterOperation::CONTRAST:
 232     case FilterOperation::OPACITY:
 233     case FilterOperation::BLUR:
 234     case FilterOperation::SATURATING_BRIGHTNESS:
 235       value->SetDouble("amount", amount_);
 236       break;
 237     case FilterOperation::DROP_SHADOW:
 238       value->SetDouble("std_deviation", amount_);
 239       value->Set("offset", MathUtil::AsValue(drop_shadow_offset_).release());
 240       value->SetInteger("color", drop_shadow_color_);
 241       break;
 242     case FilterOperation::COLOR_MATRIX: {
 243       scoped_ptr<base::ListValue> matrix(new base::ListValue);
 244       for (size_t i = 0; i < arraysize(matrix_); ++i)
 245         matrix->AppendDouble(matrix_[i]);
 246       value->Set("matrix", matrix.release());
 247       break;
 248     }
 249     case FilterOperation::ZOOM:
 250       value->SetDouble("amount", amount_);
 251       value->SetDouble("inset", zoom_inset_);
 252       break;
 253     case FilterOperation::REFERENCE: {
 254       int count_inputs = 0;
 255       bool can_filter_image_gpu = false;
 256       if (image_filter_) {
 257         count_inputs = image_filter_->countInputs();
 258         can_filter_image_gpu = image_filter_->canFilterImageGPU();
 259       }
 260       value->SetBoolean("is_null", !image_filter_);
 261       value->SetInteger("count_inputs", count_inputs);
 262       value->SetBoolean("can_filter_image_gpu", can_filter_image_gpu);
 263       break;
 264     }
 265   }
 266   return value.PassAs<base::Value>();
 267 }
 268
 269 }  // namespace cc