gfx/color_utils_unittest.cc

   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 "gfx/color_utils.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9 #include "third_party/skia/include/core/SkBitmap.h"
  10 #include "third_party/skia/include/core/SkColorPriv.h"
  11
  12 TEST(ColorUtils, SkColorToHSLRed) {
  13   color_utils::HSL hsl = { 0, 0, 0 };
  14   color_utils::SkColorToHSL(SK_ColorRED, &hsl);
  15   EXPECT_EQ(hsl.h, 0);
  16   EXPECT_EQ(hsl.s, 1);
  17   EXPECT_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_EQ(hsl.h, 0);
  24   EXPECT_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 TEST(ColorUtils, ColorToHSLRegisterSpill) {
  40   // In a opt build on Linux, this was causing a register spill on my laptop
  41   // (Pentium M) when converting from SkColor to HSL.
  42   SkColor input = SkColorSetARGB(255, 206, 154, 89);
  43   color_utils::HSL hsl = { -1, -1, -1 };
  44   SkColor result = color_utils::HSLShift(input, hsl);
  45   EXPECT_EQ(255U, SkColorGetA(result));
  46   EXPECT_EQ(206U, SkColorGetR(result));
  47   EXPECT_EQ(153U, SkColorGetG(result));
  48   EXPECT_EQ(88U, SkColorGetB(result));
  49 }