1 // Copyright (c) 2006-2008 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 <stdlib.h> 6 7 #include "testing/gtest/include/gtest/gtest.h" 8 #include "third_party/skia/include/core/SkBitmap.h" 9 #include "third_party/skia/include/core/SkColorPriv.h" 10 #include "ui/gfx/color_utils.h" 11 12 TEST(ColorUtils, SkColorToHSLRed) { 13 color_utils::HSL hsl = { 0, 0, 0 }; 14 color_utils::SkColorToHSL(SK_ColorRED, &hsl); 15 EXPECT_DOUBLE_EQ(hsl.h, 0); 16 EXPECT_DOUBLE_EQ(hsl.s, 1); 17 EXPECT_DOUBLE_EQ(hsl.l, 0.5); 18 } 19 20 TEST(ColorUtils, SkColorToHSLGrey) { 21 color_utils::HSL hsl = { 0, 0, 0 }; 22 color_utils::SkColorToHSL(SkColorSetARGB(255, 128, 128, 128), &hsl); 23 EXPECT_DOUBLE_EQ(hsl.h, 0); 24 EXPECT_DOUBLE_EQ(hsl.s, 0); 25 EXPECT_EQ(static_cast<int>(hsl.l * 100), 26 static_cast<int>(0.5 * 100)); // Accurate to two decimal places. 27 } 28 29 TEST(ColorUtils, HSLToSkColorWithAlpha) { 30 SkColor red = SkColorSetARGB(128, 255, 0, 0); 31 color_utils::HSL hsl = { 0, 1, 0.5 }; 32 SkColor result = color_utils::HSLToSkColor(hsl, 128); 33 EXPECT_EQ(SkColorGetA(red), SkColorGetA(result)); 34 EXPECT_EQ(SkColorGetR(red), SkColorGetR(result)); 35 EXPECT_EQ(SkColorGetG(red), SkColorGetG(result)); 36 EXPECT_EQ(SkColorGetB(red), SkColorGetB(result)); 37 } 38 39 40 TEST(ColorUtils, RGBtoHSLRoundTrip) { 41 // Just spot check values near the edges. 42 for (int r = 0; r < 10; ++r) { 43 for (int g = 0; g < 10; ++g) { 44 for (int b = 0; b < 10; ++b) { 45 SkColor rgb = SkColorSetARGB(255, r, g, b); 46 color_utils::HSL hsl = { 0, 0, 0 }; 47 color_utils::SkColorToHSL(rgb, &hsl); 48 SkColor out = color_utils::HSLToSkColor(hsl, 255); 49 EXPECT_EQ(SkColorGetR(out), SkColorGetR(rgb)); 50 EXPECT_EQ(SkColorGetG(out), SkColorGetG(rgb)); 51 EXPECT_EQ(SkColorGetB(out), SkColorGetB(rgb)); 52 } 53 } 54 } 55 for (int r = 240; r < 256; ++r) { 56 for (int g = 240; g < 256; ++g) { 57 for (int b = 240; b < 256; ++b) { 58 SkColor rgb = SkColorSetARGB(255, r, g, b); 59 color_utils::HSL hsl = { 0, 0, 0 }; 60 color_utils::SkColorToHSL(rgb, &hsl); 61 SkColor out = color_utils::HSLToSkColor(hsl, 255); 62 EXPECT_EQ(SkColorGetR(out), SkColorGetR(rgb)); 63 EXPECT_EQ(SkColorGetG(out), SkColorGetG(rgb)); 64 EXPECT_EQ(SkColorGetB(out), SkColorGetB(rgb)); 65 } 66 } 67 } 68 } 69 70 TEST(ColorUtils, ColorToHSLRegisterSpill) { 71 // In a opt build on Linux, this was causing a register spill on my laptop 72 // (Pentium M) when converting from SkColor to HSL. 73 SkColor input = SkColorSetARGB(255, 206, 154, 89); 74 color_utils::HSL hsl = { -1, -1, -1 }; 75 SkColor result = color_utils::HSLShift(input, hsl); 76 // |result| should be the same as |input| since we passed in a value meaning 77 // no color shift. 78 EXPECT_EQ(SkColorGetA(input), SkColorGetA(result)); 79 EXPECT_EQ(SkColorGetR(input), SkColorGetR(result)); 80 EXPECT_EQ(SkColorGetG(input), SkColorGetG(result)); 81 EXPECT_EQ(SkColorGetB(input), SkColorGetB(result)); 82 } 83 84 TEST(ColorUtils, AlphaBlend) { 85 SkColor fore = SkColorSetARGB(255, 200, 200, 200); 86 SkColor back = SkColorSetARGB(255, 100, 100, 100); 87 88 EXPECT_TRUE(color_utils::AlphaBlend(fore, back, 255) == 89 fore); 90 EXPECT_TRUE(color_utils::AlphaBlend(fore, back, 0) == 91 back); 92 93 // One is fully transparent, result is partially transparent. 94 back = SkColorSetA(back, 0); 95 EXPECT_EQ(136U, SkColorGetA(color_utils::AlphaBlend(fore, back, 136))); 96 97 // Both are fully transparent, result is fully transparent. 98 fore = SkColorSetA(fore, 0); 99 EXPECT_EQ(0U, SkColorGetA(color_utils::AlphaBlend(fore, back, 255))); 100 } 101
