root/cc/output/filter_operations_unittest.cc

DEFINITIONS

1. TEST
2. TEST
3. TEST
4. TEST
5. TEST
6. TEST
7. TEST
8. TEST
9. TEST
10. TEST
11. TEST
12. TEST
13. TEST
14. TEST
15. TEST
16. TEST
17. TEST
18. TEST
19. TEST
20. TEST
21. TEST
22. TEST
23. TEST
24. TEST
25. TEST
26. TEST
27. TEST
28. TEST
29. TEST
30. TEST
31. TEST
32. TEST
33. TEST
34. TEST

// 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.

#include "cc/output/filter_operations.h"
#include "skia/ext/refptr.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/effects/SkBlurImageFilter.h"
#include "ui/gfx/point.h"

namespace cc {
namespace {

TEST(FilterOperationsTest, GetOutsetsBlur) {
  FilterOperations ops;
  ops.Append(FilterOperation::CreateBlurFilter(20));
  int top, right, bottom, left;
  top = right = bottom = left = 0;
  ops.GetOutsets(&top, &right, &bottom, &left);
  EXPECT_EQ(57, top);
  EXPECT_EQ(57, right);
  EXPECT_EQ(57, bottom);
  EXPECT_EQ(57, left);
}

TEST(FilterOperationsTest, GetOutsetsDropShadow) {
  FilterOperations ops;
  ops.Append(FilterOperation::CreateDropShadowFilter(gfx::Point(3, 8), 20, 0));
  int top, right, bottom, left;
  top = right = bottom = left = 0;
  ops.GetOutsets(&top, &right, &bottom, &left);
  EXPECT_EQ(49, top);
  EXPECT_EQ(60, right);
  EXPECT_EQ(65, bottom);
  EXPECT_EQ(54, left);
}

#define SAVE_RESTORE_AMOUNT(filter_name, filter_type, a)                  \
  {                                                                       \
    FilterOperation op = FilterOperation::Create##filter_name##Filter(a); \
    EXPECT_EQ(FilterOperation::filter_type, op.type());                   \
    EXPECT_EQ(a, op.amount());                                            \
                                                                          \
    FilterOperation op2 = FilterOperation::CreateEmptyFilter();           \
    op2.set_type(FilterOperation::filter_type);                           \
                                                                          \
    EXPECT_NE(a, op2.amount());                                           \
                                                                          \
    op2.set_amount(a);                                                    \
                                                                          \
    EXPECT_EQ(FilterOperation::filter_type, op2.type());                  \
    EXPECT_EQ(a, op2.amount());                                           \
  }

#define SAVE_RESTORE_OFFSET_AMOUNT_COLOR(filter_name, filter_type, a, b, c) \
  {                                                                         \
    FilterOperation op =                                                    \
        FilterOperation::Create##filter_name##Filter(a, b, c);              \
    EXPECT_EQ(FilterOperation::filter_type, op.type());                     \
    EXPECT_EQ(a, op.drop_shadow_offset());                                  \
    EXPECT_EQ(b, op.amount());                                              \
    EXPECT_EQ(c, op.drop_shadow_color());                                   \
                                                                            \
    FilterOperation op2 = FilterOperation::CreateEmptyFilter();             \
    op2.set_type(FilterOperation::filter_type);                             \
                                                                            \
    EXPECT_NE(a, op2.drop_shadow_offset());                                 \
    EXPECT_NE(b, op2.amount());                                             \
    EXPECT_NE(c, op2.drop_shadow_color());                                  \
                                                                            \
    op2.set_drop_shadow_offset(a);                                          \
    op2.set_amount(b);                                                      \
    op2.set_drop_shadow_color(c);                                           \
                                                                            \
    EXPECT_EQ(FilterOperation::filter_type, op2.type());                    \
    EXPECT_EQ(a, op2.drop_shadow_offset());                                 \
    EXPECT_EQ(b, op2.amount());                                             \
    EXPECT_EQ(c, op2.drop_shadow_color());                                  \
  }

#define SAVE_RESTORE_MATRIX(filter_name, filter_type, a)                  \
  {                                                                       \
    FilterOperation op = FilterOperation::Create##filter_name##Filter(a); \
    EXPECT_EQ(FilterOperation::filter_type, op.type());                   \
    for (size_t i = 0; i < 20; ++i)                                       \
      EXPECT_EQ(a[i], op.matrix()[i]);                                    \
                                                                          \
    FilterOperation op2 = FilterOperation::CreateEmptyFilter();           \
    op2.set_type(FilterOperation::filter_type);                           \
                                                                          \
    for (size_t i = 0; i < 20; ++i)                                       \
      EXPECT_NE(a[i], op2.matrix()[i]);                                   \
                                                                          \
    op2.set_matrix(a);                                                    \
                                                                          \
    EXPECT_EQ(FilterOperation::filter_type, op2.type());                  \
    for (size_t i = 0; i < 20; ++i)                                       \
      EXPECT_EQ(a[i], op.matrix()[i]);                                    \
  }

#define SAVE_RESTORE_AMOUNT_INSET(filter_name, filter_type, a, b)            \
  {                                                                          \
    FilterOperation op = FilterOperation::Create##filter_name##Filter(a, b); \
    EXPECT_EQ(FilterOperation::filter_type, op.type());                      \
    EXPECT_EQ(a, op.amount());                                               \
    EXPECT_EQ(b, op.zoom_inset());                                           \
                                                                             \
    FilterOperation op2 = FilterOperation::CreateEmptyFilter();              \
    op2.set_type(FilterOperation::filter_type);                              \
                                                                             \
    EXPECT_NE(a, op2.amount());                                              \
    EXPECT_NE(b, op2.zoom_inset());                                          \
                                                                             \
    op2.set_amount(a);                                                       \
    op2.set_zoom_inset(b);                                                   \
                                                                             \
    EXPECT_EQ(FilterOperation::filter_type, op2.type());                     \
    EXPECT_EQ(a, op2.amount());                                              \
    EXPECT_EQ(b, op2.zoom_inset());                                          \
  }

TEST(FilterOperationsTest, SaveAndRestore) {
  SAVE_RESTORE_AMOUNT(Grayscale, GRAYSCALE, 0.6f);
  SAVE_RESTORE_AMOUNT(Sepia, SEPIA, 0.6f);
  SAVE_RESTORE_AMOUNT(Saturate, SATURATE, 0.6f);
  SAVE_RESTORE_AMOUNT(HueRotate, HUE_ROTATE, 0.6f);
  SAVE_RESTORE_AMOUNT(Invert, INVERT, 0.6f);
  SAVE_RESTORE_AMOUNT(Brightness, BRIGHTNESS, 0.6f);
  SAVE_RESTORE_AMOUNT(Contrast, CONTRAST, 0.6f);
  SAVE_RESTORE_AMOUNT(Opacity, OPACITY, 0.6f);
  SAVE_RESTORE_AMOUNT(Blur, BLUR, 0.6f);
  SAVE_RESTORE_AMOUNT(SaturatingBrightness, SATURATING_BRIGHTNESS, 0.6f);
  SAVE_RESTORE_OFFSET_AMOUNT_COLOR(
      DropShadow, DROP_SHADOW, gfx::Point(3, 4), 0.4f, 0xffffff00);

  SkScalar matrix[20] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
                         17, 18, 19, 20};
  SAVE_RESTORE_MATRIX(ColorMatrix, COLOR_MATRIX, matrix);

  SAVE_RESTORE_AMOUNT_INSET(Zoom, ZOOM, 0.5f, 32);
}

TEST(FilterOperationsTest, BlendGrayscaleFilters) {
  FilterOperation from = FilterOperation::CreateGrayscaleFilter(0.25f);
  FilterOperation to = FilterOperation::CreateGrayscaleFilter(0.75f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateGrayscaleFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateGrayscaleFilter(0.625f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.8);
  expected = FilterOperation::CreateGrayscaleFilter(1.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendGrayscaleWithNull) {
  FilterOperation filter = FilterOperation::CreateGrayscaleFilter(1.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateGrayscaleFilter(0.75f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateGrayscaleFilter(0.25f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendSepiaFilters) {
  FilterOperation from = FilterOperation::CreateSepiaFilter(0.25f);
  FilterOperation to = FilterOperation::CreateSepiaFilter(0.75f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateSepiaFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateSepiaFilter(0.625f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.8);
  expected = FilterOperation::CreateSepiaFilter(1.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendSepiaWithNull) {
  FilterOperation filter = FilterOperation::CreateSepiaFilter(1.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateSepiaFilter(0.75f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateSepiaFilter(0.25f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendSaturateFilters) {
  FilterOperation from = FilterOperation::CreateSaturateFilter(0.25f);
  FilterOperation to = FilterOperation::CreateSaturateFilter(0.75f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateSaturateFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateSaturateFilter(0.625f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 2.0);
  expected = FilterOperation::CreateSaturateFilter(1.25f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendSaturateWithNull) {
  FilterOperation filter = FilterOperation::CreateSaturateFilter(0.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateSaturateFilter(0.25f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateSaturateFilter(0.75f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendHueRotateFilters) {
  FilterOperation from = FilterOperation::CreateHueRotateFilter(3.f);
  FilterOperation to = FilterOperation::CreateHueRotateFilter(7.f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateHueRotateFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateHueRotateFilter(6.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  expected = FilterOperation::CreateHueRotateFilter(9.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendHueRotateWithNull) {
  FilterOperation filter = FilterOperation::CreateHueRotateFilter(1.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateHueRotateFilter(0.75f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateHueRotateFilter(0.25f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendInvertFilters) {
  FilterOperation from = FilterOperation::CreateInvertFilter(0.25f);
  FilterOperation to = FilterOperation::CreateInvertFilter(0.75f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateInvertFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateInvertFilter(0.625f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.8);
  expected = FilterOperation::CreateInvertFilter(1.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendInvertWithNull) {
  FilterOperation filter = FilterOperation::CreateInvertFilter(1.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateInvertFilter(0.75f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateInvertFilter(0.25f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendBrightnessFilters) {
  FilterOperation from = FilterOperation::CreateBrightnessFilter(3.f);
  FilterOperation to = FilterOperation::CreateBrightnessFilter(7.f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.9);
  FilterOperation expected = FilterOperation::CreateBrightnessFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateBrightnessFilter(6.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  expected = FilterOperation::CreateBrightnessFilter(9.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendBrightnessWithNull) {
  FilterOperation filter = FilterOperation::CreateBrightnessFilter(0.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateBrightnessFilter(0.25f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateBrightnessFilter(0.75f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendContrastFilters) {
  FilterOperation from = FilterOperation::CreateContrastFilter(3.f);
  FilterOperation to = FilterOperation::CreateContrastFilter(7.f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.9);
  FilterOperation expected = FilterOperation::CreateContrastFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateContrastFilter(6.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  expected = FilterOperation::CreateContrastFilter(9.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendContrastWithNull) {
  FilterOperation filter = FilterOperation::CreateContrastFilter(0.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateContrastFilter(0.25f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateContrastFilter(0.75f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendOpacityFilters) {
  FilterOperation from = FilterOperation::CreateOpacityFilter(0.25f);
  FilterOperation to = FilterOperation::CreateOpacityFilter(0.75f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateOpacityFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateOpacityFilter(0.625f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.8);
  expected = FilterOperation::CreateOpacityFilter(1.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendOpacityWithNull) {
  FilterOperation filter = FilterOperation::CreateOpacityFilter(0.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateOpacityFilter(0.25f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateOpacityFilter(0.75f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendBlurFilters) {
  FilterOperation from = FilterOperation::CreateBlurFilter(3.f);
  FilterOperation to = FilterOperation::CreateBlurFilter(7.f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.9);
  FilterOperation expected = FilterOperation::CreateBlurFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateBlurFilter(6.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  expected = FilterOperation::CreateBlurFilter(9.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendBlurWithNull) {
  FilterOperation filter = FilterOperation::CreateBlurFilter(1.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateBlurFilter(0.75f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateBlurFilter(0.25f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendDropShadowFilters) {
  FilterOperation from = FilterOperation::CreateDropShadowFilter(
      gfx::Point(0, 0), 2.f, SkColorSetARGB(15, 34, 68, 136));
  FilterOperation to = FilterOperation::CreateDropShadowFilter(
      gfx::Point(3, 5), 6.f, SkColorSetARGB(51, 30, 60, 120));

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateDropShadowFilter(
      gfx::Point(-2, -4), 0.f, SkColorSetARGB(0, 0, 0, 0));
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.25);
  expected = FilterOperation::CreateDropShadowFilter(
      gfx::Point(1, 1), 3.f, SkColorSetARGB(24, 32, 64, 128));
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateDropShadowFilter(
      gfx::Point(2, 4), 5.f, SkColorSetARGB(42, 30, 61, 121));
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  expected = FilterOperation::CreateDropShadowFilter(
      gfx::Point(5, 8), 8.f, SkColorSetARGB(69, 30, 59, 118));
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendDropShadowWithNull) {
  FilterOperation filter = FilterOperation::CreateDropShadowFilter(
      gfx::Point(4, 4), 4.f, SkColorSetARGB(255, 40, 0, 0));

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateDropShadowFilter(
      gfx::Point(3, 3), 3.f, SkColorSetARGB(191, 40, 0, 0));
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateDropShadowFilter(
      gfx::Point(1, 1), 1.f, SkColorSetARGB(64, 40, 0, 0));
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendZoomFilters) {
  FilterOperation from = FilterOperation::CreateZoomFilter(2.f, 3);
  FilterOperation to = FilterOperation::CreateZoomFilter(6.f, 0);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected = FilterOperation::CreateZoomFilter(1.f, 5);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateZoomFilter(5.f, 1);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  expected = FilterOperation::CreateZoomFilter(8.f, 0);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendZoomWithNull) {
  FilterOperation filter = FilterOperation::CreateZoomFilter(2.f, 1);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected = FilterOperation::CreateZoomFilter(1.75f, 1);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateZoomFilter(1.25f, 0);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendSaturatingBrightnessFilters) {
  FilterOperation from = FilterOperation::CreateSaturatingBrightnessFilter(3.f);
  FilterOperation to = FilterOperation::CreateSaturatingBrightnessFilter(7.f);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  FilterOperation expected =
      FilterOperation::CreateSaturatingBrightnessFilter(0.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 0.75);
  expected = FilterOperation::CreateSaturatingBrightnessFilter(6.f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  expected = FilterOperation::CreateSaturatingBrightnessFilter(9.f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendSaturatingBrightnessWithNull) {
  FilterOperation filter =
      FilterOperation::CreateSaturatingBrightnessFilter(1.f);

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  FilterOperation expected =
      FilterOperation::CreateSaturatingBrightnessFilter(0.75f);
  EXPECT_EQ(expected, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  expected = FilterOperation::CreateSaturatingBrightnessFilter(0.25f);
  EXPECT_EQ(expected, blended);
}

TEST(FilterOperationsTest, BlendReferenceFilters) {
  skia::RefPtr<SkImageFilter> from_filter = skia::AdoptRef(
      new SkBlurImageFilter(1.f, 1.f));
  skia::RefPtr<SkImageFilter> to_filter = skia::AdoptRef(
      new SkBlurImageFilter(2.f, 2.f));
  FilterOperation from = FilterOperation::CreateReferenceFilter(from_filter);
  FilterOperation to = FilterOperation::CreateReferenceFilter(to_filter);

  FilterOperation blended = FilterOperation::Blend(&from, &to, -0.75);
  EXPECT_EQ(from, blended);

  blended = FilterOperation::Blend(&from, &to, 0.5);
  EXPECT_EQ(from, blended);

  blended = FilterOperation::Blend(&from, &to, 0.6);
  EXPECT_EQ(to, blended);

  blended = FilterOperation::Blend(&from, &to, 1.5);
  EXPECT_EQ(to, blended);
}

TEST(FilterOperationsTest, BlendReferenceWithNull) {
  skia::RefPtr<SkImageFilter> image_filter = skia::AdoptRef(
      new SkBlurImageFilter(1.f, 1.f));
  FilterOperation filter = FilterOperation::CreateReferenceFilter(image_filter);
  FilterOperation null_filter =
      FilterOperation::CreateReferenceFilter(skia::RefPtr<SkImageFilter>());

  FilterOperation blended = FilterOperation::Blend(&filter, NULL, 0.25);
  EXPECT_EQ(filter, blended);
  blended = FilterOperation::Blend(&filter, NULL, 0.75);
  EXPECT_EQ(null_filter, blended);

  blended = FilterOperation::Blend(NULL, &filter, 0.25);
  EXPECT_EQ(null_filter, blended);
  blended = FilterOperation::Blend(NULL, &filter, 0.75);
  EXPECT_EQ(filter, blended);
}

// Tests blending non-empty sequences that have the same length and matching
// operations.
TEST(FilterOperationsTest, BlendMatchingSequences) {
  FilterOperations from;
  FilterOperations to;

  from.Append(FilterOperation::CreateBlurFilter(0.f));
  to.Append(FilterOperation::CreateBlurFilter(2.f));

  from.Append(FilterOperation::CreateSaturateFilter(4.f));
  to.Append(FilterOperation::CreateSaturateFilter(0.f));

  from.Append(FilterOperation::CreateZoomFilter(2.0f, 1));
  to.Append(FilterOperation::CreateZoomFilter(10.f, 9));

  FilterOperations blended = to.Blend(from, -0.75);
  FilterOperations expected;
  expected.Append(FilterOperation::CreateBlurFilter(0.f));
  expected.Append(FilterOperation::CreateSaturateFilter(7.f));
  expected.Append(FilterOperation::CreateZoomFilter(1.f, 0));
  EXPECT_EQ(blended, expected);

  blended = to.Blend(from, 0.75);
  expected.Clear();
  expected.Append(FilterOperation::CreateBlurFilter(1.5f));
  expected.Append(FilterOperation::CreateSaturateFilter(1.f));
  expected.Append(FilterOperation::CreateZoomFilter(8.f, 7));
  EXPECT_EQ(blended, expected);

  blended = to.Blend(from, 1.5);
  expected.Clear();
  expected.Append(FilterOperation::CreateBlurFilter(3.f));
  expected.Append(FilterOperation::CreateSaturateFilter(0.f));
  expected.Append(FilterOperation::CreateZoomFilter(14.f, 13));
  EXPECT_EQ(blended, expected);
}

TEST(FilterOperationsTest, BlendEmptyAndNonEmptySequences) {
  FilterOperations empty;
  FilterOperations filters;

  filters.Append(FilterOperation::CreateGrayscaleFilter(0.75f));
  filters.Append(FilterOperation::CreateBrightnessFilter(2.f));
  filters.Append(FilterOperation::CreateHueRotateFilter(10.0f));

  FilterOperations blended = empty.Blend(filters, -0.75);
  FilterOperations expected;
  expected.Append(FilterOperation::CreateGrayscaleFilter(1.f));
  expected.Append(FilterOperation::CreateBrightnessFilter(2.75f));
  expected.Append(FilterOperation::CreateHueRotateFilter(17.5f));
  EXPECT_EQ(blended, expected);

  blended = empty.Blend(filters, 0.75);
  expected.Clear();
  expected.Append(FilterOperation::CreateGrayscaleFilter(0.1875f));
  expected.Append(FilterOperation::CreateBrightnessFilter(1.25f));
  expected.Append(FilterOperation::CreateHueRotateFilter(2.5f));
  EXPECT_EQ(blended, expected);

  blended = empty.Blend(filters, 1.5);
  expected.Clear();
  expected.Append(FilterOperation::CreateGrayscaleFilter(0.f));
  expected.Append(FilterOperation::CreateBrightnessFilter(0.5f));
  expected.Append(FilterOperation::CreateHueRotateFilter(-5.f));
  EXPECT_EQ(blended, expected);

  blended = filters.Blend(empty, -0.75);
  expected.Clear();
  expected.Append(FilterOperation::CreateGrayscaleFilter(0.f));
  expected.Append(FilterOperation::CreateBrightnessFilter(0.25f));
  expected.Append(FilterOperation::CreateHueRotateFilter(-7.5f));
  EXPECT_EQ(blended, expected);

  blended = filters.Blend(empty, 0.75);
  expected.Clear();
  expected.Append(FilterOperation::CreateGrayscaleFilter(0.5625f));
  expected.Append(FilterOperation::CreateBrightnessFilter(1.75f));
  expected.Append(FilterOperation::CreateHueRotateFilter(7.5f));
  EXPECT_EQ(blended, expected);

  blended = filters.Blend(empty, 1.5);
  expected.Clear();
  expected.Append(FilterOperation::CreateGrayscaleFilter(1.f));
  expected.Append(FilterOperation::CreateBrightnessFilter(2.5f));
  expected.Append(FilterOperation::CreateHueRotateFilter(15.f));
  EXPECT_EQ(blended, expected);
}

TEST(FilterOperationsTest, BlendEmptySequences) {
  FilterOperations empty;

  FilterOperations blended = empty.Blend(empty, -0.75);
  EXPECT_EQ(blended, empty);

  blended = empty.Blend(empty, 0.75);
  EXPECT_EQ(blended, empty);

  blended = empty.Blend(empty, 1.5);
  EXPECT_EQ(blended, empty);
}

// Tests blending non-empty sequences that have non-matching operations.
TEST(FilterOperationsTest, BlendNonMatchingSequences) {
  FilterOperations from;
  FilterOperations to;

  from.Append(FilterOperation::CreateSaturateFilter(3.f));
  from.Append(FilterOperation::CreateBlurFilter(2.f));
  to.Append(FilterOperation::CreateSaturateFilter(4.f));
  to.Append(FilterOperation::CreateHueRotateFilter(0.5f));

  FilterOperations blended = to.Blend(from, -0.75);
  EXPECT_EQ(to, blended);
  blended = to.Blend(from, 0.75);
  EXPECT_EQ(to, blended);
  blended = to.Blend(from, 1.5);
  EXPECT_EQ(to, blended);
}

// Tests blending non-empty sequences of different sizes.
TEST(FilterOperationsTest, BlendRaggedSequences) {
  FilterOperations from;
  FilterOperations to;

  from.Append(FilterOperation::CreateSaturateFilter(3.f));
  from.Append(FilterOperation::CreateBlurFilter(2.f));
  to.Append(FilterOperation::CreateSaturateFilter(4.f));

  FilterOperations blended = to.Blend(from, -0.75);
  FilterOperations expected;
  expected.Append(FilterOperation::CreateSaturateFilter(2.25f));
  expected.Append(FilterOperation::CreateBlurFilter(3.5f));
  EXPECT_EQ(expected, blended);

  blended = to.Blend(from, 0.75);
  expected.Clear();
  expected.Append(FilterOperation::CreateSaturateFilter(3.75f));
  expected.Append(FilterOperation::CreateBlurFilter(0.5f));
  EXPECT_EQ(expected, blended);

  blended = to.Blend(from, 1.5);
  expected.Clear();
  expected.Append(FilterOperation::CreateSaturateFilter(4.5f));
  expected.Append(FilterOperation::CreateBlurFilter(0.f));
  EXPECT_EQ(expected, blended);

  from.Append(FilterOperation::CreateOpacityFilter(1.f));
  to.Append(FilterOperation::CreateOpacityFilter(1.f));
  blended = to.Blend(from, -0.75);
  EXPECT_EQ(to, blended);
  blended = to.Blend(from, 0.75);
  EXPECT_EQ(to, blended);
  blended = to.Blend(from, 1.5);
  EXPECT_EQ(to, blended);
}

}  // namespace
}  // namespace cc