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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 #ifndef SkImageInfo_DEFINED | 8 #ifndef SkImageInfo_DEFINED |
9 #define SkImageInfo_DEFINED | 9 #define SkImageInfo_DEFINED |
10 | 10 |
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56 } | 56 } |
57 | 57 |
58 /////////////////////////////////////////////////////////////////////////////// | 58 /////////////////////////////////////////////////////////////////////////////// |
59 | 59 |
60 /** | 60 /** |
61 * Describes how to interpret the components of a pixel. | 61 * Describes how to interpret the components of a pixel. |
62 */ | 62 */ |
63 enum SkColorType { | 63 enum SkColorType { |
64 kAlpha_8_SkColorType, | 64 kAlpha_8_SkColorType, |
65 kRGB_565_SkColorType, | 65 kRGB_565_SkColorType, |
| 66 kARGB_4444_SkColorType, |
66 kRGBA_8888_SkColorType, | 67 kRGBA_8888_SkColorType, |
67 kBGRA_8888_SkColorType, | 68 kBGRA_8888_SkColorType, |
68 kIndex8_SkColorType, | 69 kIndex8_SkColorType, |
69 | 70 |
70 kLastEnum_SkColorType = kIndex8_SkColorType, | 71 kLastEnum_SkColorType = kIndex8_SkColorType, |
71 | 72 |
72 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) | 73 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) |
73 kPMColor_SkColorType = kBGRA_8888_SkColorType | 74 kPMColor_SkColorType = kBGRA_8888_SkColorType |
74 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) | 75 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) |
75 kPMColor_SkColorType = kRGBA_8888_SkColorType | 76 kPMColor_SkColorType = kRGBA_8888_SkColorType |
76 #else | 77 #else |
77 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order" | 78 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order" |
78 #endif | 79 #endif |
79 }; | 80 }; |
80 | 81 |
81 static int SkColorTypeBytesPerPixel(SkColorType ct) { | 82 static int SkColorTypeBytesPerPixel(SkColorType ct) { |
82 static const uint8_t gSize[] = { | 83 static const uint8_t gSize[] = { |
83 1, // Alpha_8 | 84 1, // Alpha_8 |
84 2, // RGB_565 | 85 2, // RGB_565 |
| 86 2, // ARGB_4444 |
85 4, // RGBA_8888 | 87 4, // RGBA_8888 |
86 4, // BGRA_8888 | 88 4, // BGRA_8888 |
87 1, // kIndex_8 | 89 1, // kIndex_8 |
88 }; | 90 }; |
89 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType +
1), | 91 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType +
1), |
90 size_mismatch_with_SkColorType_enum); | 92 size_mismatch_with_SkColorType_enum); |
91 | 93 |
92 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize)); | 94 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize)); |
93 return gSize[ct]; | 95 return gSize[ct]; |
94 } | 96 } |
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105 SkAlphaType fAlphaType; | 107 SkAlphaType fAlphaType; |
106 | 108 |
107 bool isOpaque() const { | 109 bool isOpaque() const { |
108 return SkAlphaTypeIsOpaque(fAlphaType); | 110 return SkAlphaTypeIsOpaque(fAlphaType); |
109 } | 111 } |
110 | 112 |
111 int bytesPerPixel() const { | 113 int bytesPerPixel() const { |
112 return SkColorTypeBytesPerPixel(fColorType); | 114 return SkColorTypeBytesPerPixel(fColorType); |
113 } | 115 } |
114 | 116 |
| 117 size_t minRowBytes() const { |
| 118 return fWidth * this->bytesPerPixel(); |
| 119 } |
| 120 |
115 bool operator==(const SkImageInfo& other) const { | 121 bool operator==(const SkImageInfo& other) const { |
116 return 0 == memcmp(this, &other, sizeof(other)); | 122 return 0 == memcmp(this, &other, sizeof(other)); |
117 } | 123 } |
118 bool operator!=(const SkImageInfo& other) const { | 124 bool operator!=(const SkImageInfo& other) const { |
119 return 0 != memcmp(this, &other, sizeof(other)); | 125 return 0 != memcmp(this, &other, sizeof(other)); |
120 } | 126 } |
| 127 |
| 128 bool isValid() const { |
| 129 return fWidth >= 0 && |
| 130 fHeight >= 0 && |
| 131 fColorType <= kLastEnum_SkColorType && |
| 132 fAlphaType <= kLastEnum_SkAlphaType; |
| 133 } |
| 134 |
| 135 void validate() const { |
| 136 SkASSERT(this->isValid()); |
| 137 } |
121 }; | 138 }; |
122 | 139 |
123 #endif | 140 #endif |
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