src/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/debug/trace_event_argument.h"
   8 #include "base/values.h"
   9 #include "cc/base/math_util.h"
  10 #include "cc/output/filter_operation.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   if (type_ == ALPHA_THRESHOLD) {
  28     return region_ == other.region_ &&
  29         amount_ == other.amount_ &&
  30         outer_threshold_ == other.outer_threshold_;
  31   }
  32   return amount_ == other.amount_;
  33 }
  34
  35 FilterOperation::FilterOperation(FilterType type, float amount)
  36     : type_(type),
  37       amount_(amount),
  38       outer_threshold_(0),
  39       drop_shadow_offset_(0, 0),
  40       drop_shadow_color_(0),
  41       zoom_inset_(0) {
  42   DCHECK_NE(type_, DROP_SHADOW);
  43   DCHECK_NE(type_, COLOR_MATRIX);
  44   DCHECK_NE(type_, REFERENCE);
  45   memset(matrix_, 0, sizeof(matrix_));
  46 }
  47
  48 FilterOperation::FilterOperation(FilterType type,
  49                                  const gfx::Point& offset,
  50                                  float stdDeviation,
  51                                  SkColor color)
  52     : type_(type),
  53       amount_(stdDeviation),
  54       outer_threshold_(0),
  55       drop_shadow_offset_(offset),
  56       drop_shadow_color_(color),
  57       zoom_inset_(0) {
  58   DCHECK_EQ(type_, DROP_SHADOW);
  59   memset(matrix_, 0, sizeof(matrix_));
  60 }
  61
  62 FilterOperation::FilterOperation(FilterType type, SkScalar matrix[20])
  63     : type_(type),
  64       amount_(0),
  65       outer_threshold_(0),
  66       drop_shadow_offset_(0, 0),
  67       drop_shadow_color_(0),
  68       zoom_inset_(0) {
  69   DCHECK_EQ(type_, COLOR_MATRIX);
  70   memcpy(matrix_, matrix, sizeof(matrix_));
  71 }
  72
  73 FilterOperation::FilterOperation(FilterType type, float amount, int inset)
  74     : type_(type),
  75       amount_(amount),
  76       outer_threshold_(0),
  77       drop_shadow_offset_(0, 0),
  78       drop_shadow_color_(0),
  79       zoom_inset_(inset) {
  80   DCHECK_EQ(type_, ZOOM);
  81   memset(matrix_, 0, sizeof(matrix_));
  82 }
  83
  84 FilterOperation::FilterOperation(
  85     FilterType type,
  86     const skia::RefPtr<SkImageFilter>& image_filter)
  87     : type_(type),
  88       amount_(0),
  89       outer_threshold_(0),
  90       drop_shadow_offset_(0, 0),
  91       drop_shadow_color_(0),
  92       image_filter_(image_filter),
  93       zoom_inset_(0) {
  94   DCHECK_EQ(type_, REFERENCE);
  95   memset(matrix_, 0, sizeof(matrix_));
  96 }
  97
  98 FilterOperation::FilterOperation(FilterType type,
  99                                  const SkRegion& region,
 100                                  float inner_threshold,
 101                                  float outer_threshold)
 102     : type_(type),
 103       amount_(inner_threshold),
 104       outer_threshold_(outer_threshold),
 105       drop_shadow_offset_(0, 0),
 106       drop_shadow_color_(0),
 107       zoom_inset_(0),
 108       region_(region) {
 109   DCHECK_EQ(type_, ALPHA_THRESHOLD);
 110   memset(matrix_, 0, sizeof(matrix_));
 111 }
 112
 113 FilterOperation::FilterOperation(const FilterOperation& other)
 114     : type_(other.type_),
 115       amount_(other.amount_),
 116       outer_threshold_(other.outer_threshold_),
 117       drop_shadow_offset_(other.drop_shadow_offset_),
 118       drop_shadow_color_(other.drop_shadow_color_),
 119       image_filter_(other.image_filter_),
 120       zoom_inset_(other.zoom_inset_),
 121       region_(other.region_) {
 122   memcpy(matrix_, other.matrix_, sizeof(matrix_));
 123 }
 124
 125 FilterOperation::~FilterOperation() {
 126 }
 127
 128 static FilterOperation CreateNoOpFilter(FilterOperation::FilterType type) {
 129   switch (type) {
 130     case FilterOperation::GRAYSCALE:
 131       return FilterOperation::CreateGrayscaleFilter(0.f);
 132     case FilterOperation::SEPIA:
 133       return FilterOperation::CreateSepiaFilter(0.f);
 134     case FilterOperation::SATURATE:
 135       return FilterOperation::CreateSaturateFilter(1.f);
 136     case FilterOperation::HUE_ROTATE:
 137       return FilterOperation::CreateHueRotateFilter(0.f);
 138     case FilterOperation::INVERT:
 139       return FilterOperation::CreateInvertFilter(0.f);
 140     case FilterOperation::BRIGHTNESS:
 141       return FilterOperation::CreateBrightnessFilter(1.f);
 142     case FilterOperation::CONTRAST:
 143       return FilterOperation::CreateContrastFilter(1.f);
 144     case FilterOperation::OPACITY:
 145       return FilterOperation::CreateOpacityFilter(1.f);
 146     case FilterOperation::BLUR:
 147       return FilterOperation::CreateBlurFilter(0.f);
 148     case FilterOperation::DROP_SHADOW:
 149       return FilterOperation::CreateDropShadowFilter(
 150           gfx::Point(0, 0), 0.f, SK_ColorTRANSPARENT);
 151     case FilterOperation::COLOR_MATRIX: {
 152       SkScalar matrix[20];
 153       memset(matrix, 0, 20 * sizeof(SkScalar));
 154       matrix[0] = matrix[6] = matrix[12] = matrix[18] = 1.f;
 155       return FilterOperation::CreateColorMatrixFilter(matrix);
 156     }
 157     case FilterOperation::ZOOM:
 158       return FilterOperation::CreateZoomFilter(1.f, 0);
 159     case FilterOperation::SATURATING_BRIGHTNESS:
 160       return FilterOperation::CreateSaturatingBrightnessFilter(0.f);
 161     case FilterOperation::REFERENCE:
 162       return FilterOperation::CreateReferenceFilter(
 163           skia::RefPtr<SkImageFilter>());
 164     case FilterOperation::ALPHA_THRESHOLD:
 165       return FilterOperation::CreateAlphaThresholdFilter(SkRegion(), 1.f, 0.f);
 166   }
 167   NOTREACHED();
 168   return FilterOperation::CreateEmptyFilter();
 169 }
 170
 171 static float ClampAmountForFilterType(float amount,
 172                                       FilterOperation::FilterType type) {
 173   switch (type) {
 174     case FilterOperation::GRAYSCALE:
 175     case FilterOperation::SEPIA:
 176     case FilterOperation::INVERT:
 177     case FilterOperation::OPACITY:
 178     case FilterOperation::ALPHA_THRESHOLD:
 179       return MathUtil::ClampToRange(amount, 0.f, 1.f);
 180     case FilterOperation::SATURATE:
 181     case FilterOperation::BRIGHTNESS:
 182     case FilterOperation::CONTRAST:
 183     case FilterOperation::BLUR:
 184     case FilterOperation::DROP_SHADOW:
 185       return std::max(amount, 0.f);
 186     case FilterOperation::ZOOM:
 187       return std::max(amount, 1.f);
 188     case FilterOperation::HUE_ROTATE:
 189     case FilterOperation::SATURATING_BRIGHTNESS:
 190       return amount;
 191     case FilterOperation::COLOR_MATRIX:
 192     case FilterOperation::REFERENCE:
 193       NOTREACHED();
 194       return amount;
 195   }
 196   NOTREACHED();
 197   return amount;
 198 }
 199
 200 // static
 201 FilterOperation FilterOperation::Blend(const FilterOperation* from,
 202                                        const FilterOperation* to,
 203                                        double progress) {
 204   FilterOperation blended_filter = FilterOperation::CreateEmptyFilter();
 205
 206   if (!from && !to)
 207     return blended_filter;
 208
 209   const FilterOperation& from_op = from ? *from : CreateNoOpFilter(to->type());
 210   const FilterOperation& to_op = to ? *to : CreateNoOpFilter(from->type());
 211
 212   if (from_op.type() != to_op.type())
 213     return blended_filter;
 214
 215   DCHECK(to_op.type() != FilterOperation::COLOR_MATRIX);
 216   blended_filter.set_type(to_op.type());
 217
 218   if (to_op.type() == FilterOperation::REFERENCE) {
 219     if (progress > 0.5)
 220       blended_filter.set_image_filter(to_op.image_filter());
 221     else
 222       blended_filter.set_image_filter(from_op.image_filter());
 223     return blended_filter;
 224   }
 225
 226   blended_filter.set_amount(ClampAmountForFilterType(
 227       gfx::Tween::FloatValueBetween(progress, from_op.amount(), to_op.amount()),
 228       to_op.type()));
 229
 230   if (to_op.type() == FilterOperation::DROP_SHADOW) {
 231     gfx::Point blended_offset(
 232         gfx::Tween::LinearIntValueBetween(progress,
 233                                           from_op.drop_shadow_offset().x(),
 234                                           to_op.drop_shadow_offset().x()),
 235         gfx::Tween::LinearIntValueBetween(progress,
 236                                           from_op.drop_shadow_offset().y(),
 237                                           to_op.drop_shadow_offset().y()));
 238     blended_filter.set_drop_shadow_offset(blended_offset);
 239     blended_filter.set_drop_shadow_color(gfx::Tween::ColorValueBetween(
 240         progress, from_op.drop_shadow_color(), to_op.drop_shadow_color()));
 241   } else if (to_op.type() == FilterOperation::ZOOM) {
 242     blended_filter.set_zoom_inset(
 243         std::max(gfx::Tween::LinearIntValueBetween(
 244                      from_op.zoom_inset(), to_op.zoom_inset(), progress),
 245                  0));
 246   } else if (to_op.type() == FilterOperation::ALPHA_THRESHOLD) {
 247     blended_filter.set_outer_threshold(ClampAmountForFilterType(
 248             gfx::Tween::FloatValueBetween(progress,
 249                                           from_op.outer_threshold(),
 250                                           to_op.outer_threshold()),
 251             to_op.type()));
 252     blended_filter.set_region(to_op.region());
 253   }
 254
 255   return blended_filter;
 256 }
 257
 258 void FilterOperation::AsValueInto(base::debug::TracedValue* value) const {
 259   value->SetInteger("type", type_);
 260   switch (type_) {
 261     case FilterOperation::GRAYSCALE:
 262     case FilterOperation::SEPIA:
 263     case FilterOperation::SATURATE:
 264     case FilterOperation::HUE_ROTATE:
 265     case FilterOperation::INVERT:
 266     case FilterOperation::BRIGHTNESS:
 267     case FilterOperation::CONTRAST:
 268     case FilterOperation::OPACITY:
 269     case FilterOperation::BLUR:
 270     case FilterOperation::SATURATING_BRIGHTNESS:
 271       value->SetDouble("amount", amount_);
 272       break;
 273     case FilterOperation::DROP_SHADOW:
 274       value->SetDouble("std_deviation", amount_);
 275       value->BeginArray("offset");
 276       MathUtil::AddToTracedValue(drop_shadow_offset_, value);
 277       value->EndArray();
 278       value->SetInteger("color", drop_shadow_color_);
 279       break;
 280     case FilterOperation::COLOR_MATRIX: {
 281       value->BeginArray("matrix");
 282       for (size_t i = 0; i < arraysize(matrix_); ++i)
 283         value->AppendDouble(matrix_[i]);
 284       value->EndArray();
 285       break;
 286     }
 287     case FilterOperation::ZOOM:
 288       value->SetDouble("amount", amount_);
 289       value->SetDouble("inset", zoom_inset_);
 290       break;
 291     case FilterOperation::REFERENCE: {
 292       int count_inputs = 0;
 293       bool can_filter_image_gpu = false;
 294       if (image_filter_) {
 295         count_inputs = image_filter_->countInputs();
 296         can_filter_image_gpu = image_filter_->canFilterImageGPU();
 297       }
 298       value->SetBoolean("is_null", !image_filter_);
 299       value->SetInteger("count_inputs", count_inputs);
 300       value->SetBoolean("can_filter_image_gpu", can_filter_image_gpu);
 301       break;
 302     }
 303     case FilterOperation::ALPHA_THRESHOLD: {
 304         value->SetDouble("inner_threshold", amount_);
 305         value->SetDouble("outer_threshold", outer_threshold_);
 306         scoped_ptr<base::ListValue> region_value(new base::ListValue());
 307         value->BeginArray("region");
 308         for (SkRegion::Iterator it(region_); !it.done(); it.next()) {
 309           value->AppendInteger(it.rect().x());
 310           value->AppendInteger(it.rect().y());
 311           value->AppendInteger(it.rect().width());
 312           value->AppendInteger(it.rect().height());
 313         }
 314         value->EndArray();
 315       }
 316       break;
 317   }
 318 }
 319
 320 }  // namespace cc