cc/render_surface_filters_unittest.cc

   1 // Copyright 2012 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 "cc/render_surface_filters.h"
   6
   7 #include "cc/test/compositor_fake_web_graphics_context_3d.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9 #include <public/WebFilterOperation.h>
  10 #include <public/WebFilterOperations.h>
  11
  12 using namespace WebKit;
  13
  14 namespace cc {
  15 namespace {
  16
  17 // Checks whether op can be combined with a following color matrix.
  18 bool isCombined(const WebFilterOperation& op)
  19 {
  20     WebFilterOperations filters;
  21     filters.append(op);
  22     filters.append(WebFilterOperation::createBrightnessFilter(0)); // brightness(0) is identity.
  23     WebFilterOperations optimized = RenderSurfaceFilters::optimize(filters);
  24     return optimized.size() == 1;
  25 }
  26
  27 TEST(RenderSurfaceFiltersTest, testColorMatrixFiltersCombined)
  28 {
  29     // Several filters should always combine for any amount between 0 and 1:
  30     // grayscale, saturate, invert, contrast, opacity.
  31     EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(0)));
  32     // Note that we use 0.3f to avoid "argument is truncated from 'double' to
  33     // 'float'" warnings on Windows. 0.5 is exactly representable as a float, so
  34     // there is no warning.
  35     EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(0.3f)));
  36     EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(0.5)));
  37     EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(1)));
  38
  39     EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(0)));
  40     EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(0.3f)));
  41     EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(0.5)));
  42     EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(1)));
  43
  44     EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(0)));
  45     EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(0.3f)));
  46     EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(0.5)));
  47     EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(1)));
  48
  49     EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(0)));
  50     EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(0.3f)));
  51     EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(0.5)));
  52     EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(1)));
  53
  54     EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(0)));
  55     EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(0.3f)));
  56     EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(0.5)));
  57     EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(1)));
  58
  59     // Several filters should never combine: brightness(amount > 0), blur, drop-shadow.
  60     EXPECT_FALSE(isCombined(WebFilterOperation::createBrightnessFilter(0.5)));
  61     EXPECT_FALSE(isCombined(WebFilterOperation::createBrightnessFilter(1)));
  62     EXPECT_FALSE(isCombined(WebFilterOperation::createBlurFilter(3)));
  63     EXPECT_FALSE(isCombined(WebFilterOperation::createDropShadowFilter(WebPoint(2, 2), 3, 0xffffffff)));
  64
  65     // sepia and hue may or may not combine depending on the value.
  66     EXPECT_TRUE(isCombined(WebFilterOperation::createSepiaFilter(0)));
  67     EXPECT_FALSE(isCombined(WebFilterOperation::createSepiaFilter(1)));
  68     EXPECT_TRUE(isCombined(WebFilterOperation::createHueRotateFilter(0)));
  69     EXPECT_FALSE(isCombined(WebFilterOperation::createHueRotateFilter(180)));
  70
  71     float matrix1[20] = {
  72         1, 0, 0, 0, 0,
  73         0, 1, 0, 0, 0,
  74         0, 0, 1, 0, 0,
  75         0, 0, 0, 1, 0,
  76     };
  77     EXPECT_TRUE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix1)));
  78
  79     float matrix2[20] = {
  80         1, 1, 0, 0, 0,
  81         0, 1, 0, 0, 0,
  82         0, 0, 1, 0, 0,
  83         0, 0, 0, 1, 0,
  84     };
  85     EXPECT_FALSE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix2)));
  86
  87     float matrix3[20] = {
  88         0.25, 0, 0, 0, 255*0.75,
  89         0, 1, 0, 0, 0,
  90         0, 0, 1, 0, 0,
  91         0, 0, 0, 1, 0,
  92     };
  93     EXPECT_TRUE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix3)));
  94
  95     float matrix4[20] = {
  96         -0.25, 0.75, 0, 0, 255*0.25,
  97         0, 1, 0, 0, 0,
  98         0, 0, 1, 0, 0,
  99         0, 0, 0, 1, 0,
 100     };
 101     EXPECT_TRUE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix4)));
 102 }
 103
 104 TEST(RenderSurfaceFiltersTest, testOptimize)
 105 {
 106     WebFilterOperation combines(WebFilterOperation::createBrightnessFilter(0));
 107     WebFilterOperation doesntCombine(WebFilterOperation::createBrightnessFilter(1));
 108
 109     WebFilterOperations filters;
 110     WebFilterOperations optimized = RenderSurfaceFilters::optimize(filters);
 111     EXPECT_EQ(0u, optimized.size());
 112
 113     filters.append(combines);
 114     optimized = RenderSurfaceFilters::optimize(filters);
 115     EXPECT_EQ(1u, optimized.size());
 116
 117     filters.append(combines);
 118     optimized = RenderSurfaceFilters::optimize(filters);
 119     EXPECT_EQ(1u, optimized.size());
 120
 121     filters.append(doesntCombine);
 122     optimized = RenderSurfaceFilters::optimize(filters);
 123     EXPECT_EQ(1u, optimized.size());
 124
 125     filters.append(combines);
 126     optimized = RenderSurfaceFilters::optimize(filters);
 127     EXPECT_EQ(2u, optimized.size());
 128
 129     filters.append(doesntCombine);
 130     optimized = RenderSurfaceFilters::optimize(filters);
 131     EXPECT_EQ(2u, optimized.size());
 132
 133     filters.append(doesntCombine);
 134     optimized = RenderSurfaceFilters::optimize(filters);
 135     EXPECT_EQ(3u, optimized.size());
 136 }
 137
 138 }  // namespace
 139 }  // namespace cc