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Side by Side Diff: app/gfx/color_utils.h

Issue 214054: Eliminate a bunch of color conversions. I was going to try and clean up the ... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: Created 11 years, 3 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef APP_GFX_COLOR_UTILS_H_ 5 #ifndef APP_GFX_COLOR_UTILS_H_
6 #define APP_GFX_COLOR_UTILS_H_ 6 #define APP_GFX_COLOR_UTILS_H_
7 7
8 #include "third_party/skia/include/core/SkColor.h" 8 #include "third_party/skia/include/core/SkColor.h"
9 9
10 class SkBitmap; 10 class SkBitmap;
11 11
12 namespace color_utils { 12 namespace color_utils {
13 13
14 // Represents set of CIE XYZ tristimulus values.
15 struct CIE_XYZ {
16 double X;
17 double Y; // luminance
18 double Z;
19 };
20
21 // Represents a L*a*b* color value
22 struct LabColor {
23 int L;
24 int a;
25 int b;
26 };
27
28 // Note: these transformations assume sRGB as the source color space
29
30 // Convert between different color spaces
31 void SkColorToCIEXYZ(SkColor c, CIE_XYZ* xyz);
32 SkColor CIEXYZToSkColor(SkAlpha alpha, const CIE_XYZ& xyz);
33
34 void SkColorToLabColor(SkColor c, LabColor* lab);
35 SkColor LabColorToSkColor(const LabColor& lab, SkAlpha alpha);
36
37 void CIEXYZToLabColor(const CIE_XYZ& xyz, LabColor* lab);
38 void LabColorToCIEXYZ(const LabColor& lab, CIE_XYZ* xyz);
39
40 // Determine if a given alpha value is nearly completely transparent. 14 // Determine if a given alpha value is nearly completely transparent.
41 bool IsColorCloseToTransparent(SkAlpha alpha); 15 bool IsColorCloseToTransparent(SkAlpha alpha);
42 16
43 // Determine if a color is near grey. 17 // Determine if a color is near grey.
44 bool IsColorCloseToGrey(int r, int g, int b); 18 bool IsColorCloseToGrey(int r, int g, int b);
45 19
46 // Gets a color representing a bitmap. The definition of "representing" is the 20 // Gets a color representing a bitmap. The definition of "representing" is the
47 // average color in the bitmap. The color returned is modified to have the 21 // average color in the bitmap. The color returned is modified to have the
48 // specified alpha. 22 // specified alpha.
49 SkColor GetAverageColorOfFavicon(SkBitmap* bitmap, SkAlpha alpha); 23 SkColor GetAverageColorOfFavicon(SkBitmap* bitmap, SkAlpha alpha);
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61 SkColor PickMoreReadableColor(SkColor foreground1, 35 SkColor PickMoreReadableColor(SkColor foreground1,
62 SkColor foreground2, 36 SkColor foreground2,
63 SkColor background); 37 SkColor background);
64 38
65 // Gets a Windows system color as a SkColor 39 // Gets a Windows system color as a SkColor
66 SkColor GetSysSkColor(int which); 40 SkColor GetSysSkColor(int which);
67 41
68 } // namespace color_utils 42 } // namespace color_utils
69 43
70 #endif // APP_GFX_COLOR_UTILS_H_ 44 #endif // APP_GFX_COLOR_UTILS_H_
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