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1 /* | 1 /* |
2 * Copyright 2010 Google Inc. | 2 * Copyright 2010 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkImageInfo.h" | 8 #include "SkImageInfo.h" |
9 #include "SkReadBuffer.h" | 9 #include "SkReadBuffer.h" |
10 #include "SkWriteBuffer.h" | 10 #include "SkWriteBuffer.h" |
11 | 11 |
12 static bool alpha_type_is_valid(SkAlphaType alphaType) { | 12 static bool alpha_type_is_valid(SkAlphaType alphaType) { |
13 return (alphaType >= 0) && (alphaType <= kLastEnum_SkAlphaType); | 13 return (alphaType >= 0) && (alphaType <= kLastEnum_SkAlphaType); |
14 } | 14 } |
15 | 15 |
16 static bool color_type_is_valid(SkColorType colorType) { | 16 static bool color_type_is_valid(SkColorType colorType) { |
17 return (colorType >= 0) && (colorType <= kLastEnum_SkColorType); | 17 return (colorType >= 0) && (colorType <= kLastEnum_SkColorType); |
18 } | 18 } |
19 | 19 |
20 static bool color_type_supports_sRGB(SkColorType colorType) { | |
21 switch (colorType) { | |
22 case kRGBA_8888_SkColorType: | |
23 case kBGRA_8888_SkColorType: | |
24 return true; | |
bsalomon
2014/08/27 17:11:30
// case kLuminance:
reed1
2014/08/27 18:52:49
Done.
| |
25 default: | |
26 return false; | |
27 } | |
28 } | |
29 | |
30 static bool color_type_supports_gamma(SkColorType colorType) { | |
31 switch (colorType) { | |
32 case kRGBA_8888_SkColorType: | |
33 case kBGRA_8888_SkColorType: | |
34 // case kLuminance ... | |
35 return true; | |
36 default: | |
37 return false; | |
38 } | |
39 } | |
40 | |
41 static bool gamma_in_range(float gamma, float* pinnedGamma) { | |
42 if (!SkScalarIsFinite(gamma)) { | |
43 return false; | |
44 } | |
45 const float min_gamma = 0.01f; | |
46 const float max_gamma = 100.0f; | |
bungeman-skia
2014/08/27 18:08:52
I actually currently have a max of 4.0 - epsilon o
reed1
2014/08/27 18:52:49
Done.
| |
47 *pinnedGamma = SkScalarPin(gamma, min_gamma, max_gamma); | |
48 return true; | |
49 } | |
50 | |
51 SkImageInfo SkImageInfo::MakeSRGB(int width, int height, SkColorType ct, SkAlpha Type at) { | |
52 SkImageInfo info = Make(width, height, ct, at); | |
53 if (color_type_supports_sRGB(info.colorType())) { | |
54 fProfile = kSRGB_Profile; | |
55 fGamma = 0; | |
56 } | |
57 return info; | |
58 } | |
59 | |
60 SkImageInfo SkImageInfo::MakeWithGamma(int width, int height, SkColorType ct, Sk AlphaType at, | |
61 float gamma) { | |
62 SkImageInfo info = Make(width, height, ct, at); | |
63 if (color_type_supports_gamma(info.colorType()) && gamma_in_range(gamma, &fG amma)) { | |
64 fProfile = kExponential_Profile; | |
65 } | |
66 return info; | |
67 } | |
68 | |
20 void SkImageInfo::unflatten(SkReadBuffer& buffer) { | 69 void SkImageInfo::unflatten(SkReadBuffer& buffer) { |
21 fWidth = buffer.read32(); | 70 fWidth = buffer.read32(); |
22 fHeight = buffer.read32(); | 71 fHeight = buffer.read32(); |
23 | 72 |
24 uint32_t packed = buffer.read32(); | 73 uint32_t packed = buffer.read32(); |
25 SkASSERT(0 == (packed >> 16)); | 74 SkASSERT(0 == (packed >> 16)); |
26 fAlphaType = (SkAlphaType)((packed >> 8) & 0xFF); | 75 fAlphaType = (SkAlphaType)((packed >> 8) & 0xFF); |
27 fColorType = (SkColorType)((packed >> 0) & 0xFF); | 76 fColorType = (SkColorType)((packed >> 0) & 0xFF); |
28 buffer.validate(alpha_type_is_valid(fAlphaType) && | 77 buffer.validate(alpha_type_is_valid(fAlphaType) && |
29 color_type_is_valid(fColorType)); | 78 color_type_is_valid(fColorType)); |
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62 alphaType = kOpaque_SkAlphaType; | 111 alphaType = kOpaque_SkAlphaType; |
63 break; | 112 break; |
64 default: | 113 default: |
65 return false; | 114 return false; |
66 } | 115 } |
67 if (canonical) { | 116 if (canonical) { |
68 *canonical = alphaType; | 117 *canonical = alphaType; |
69 } | 118 } |
70 return true; | 119 return true; |
71 } | 120 } |
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