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1 /* | 1 /* |
2 * Copyright 2016 Google Inc. | 2 * Copyright 2016 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 SkEncodedInfo_DEFINED | 8 #ifndef SkEncodedInfo_DEFINED |
9 #define SkEncodedInfo_DEFINED | 9 #define SkEncodedInfo_DEFINED |
10 | 10 |
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58 kYUVA_Color, | 58 kYUVA_Color, |
59 | 59 |
60 // JPEG | 60 // JPEG |
61 // Photoshop actually writes inverted CMYK data into JPEGs, where zero | 61 // Photoshop actually writes inverted CMYK data into JPEGs, where zero |
62 // represents 100% ink coverage. For this reason, we treat CMYK JPEGs | 62 // represents 100% ink coverage. For this reason, we treat CMYK JPEGs |
63 // as having inverted CMYK. libjpeg-turbo warns that this may break | 63 // as having inverted CMYK. libjpeg-turbo warns that this may break |
64 // other applications, but the CMYK JPEGs we see on the web expect to | 64 // other applications, but the CMYK JPEGs we see on the web expect to |
65 // be treated as inverted CMYK. | 65 // be treated as inverted CMYK. |
66 kInvertedCMYK_Color, | 66 kInvertedCMYK_Color, |
67 kYCCK_Color, | 67 kYCCK_Color, |
68 | |
69 // PNG | |
70 // 565 images may be encoded to PNG by specifying the number of | |
71 // significant bits for each channel. This is a strange 565 | |
72 // representation because the image is still encoded with 8 bits per | |
73 // component. | |
74 k565_Color, | |
68 }; | 75 }; |
69 | 76 |
70 static SkEncodedInfo Make(Color color, Alpha alpha, int bitsPerComponent) { | 77 static SkEncodedInfo Make(Color color, Alpha alpha, int bitsPerComponent) { |
71 SkASSERT(1 == bitsPerComponent || | 78 SkASSERT(1 == bitsPerComponent || |
72 2 == bitsPerComponent || | 79 2 == bitsPerComponent || |
73 4 == bitsPerComponent || | 80 4 == bitsPerComponent || |
74 8 == bitsPerComponent || | 81 8 == bitsPerComponent || |
75 16 == bitsPerComponent); | 82 16 == bitsPerComponent); |
76 | 83 |
77 switch (color) { | 84 switch (color) { |
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98 break; | 105 break; |
99 case kRGBA_Color: | 106 case kRGBA_Color: |
100 SkASSERT(kOpaque_Alpha != alpha); | 107 SkASSERT(kOpaque_Alpha != alpha); |
101 SkASSERT(bitsPerComponent >= 8); | 108 SkASSERT(bitsPerComponent >= 8); |
102 break; | 109 break; |
103 case kBGRA_Color: | 110 case kBGRA_Color: |
104 case kYUVA_Color: | 111 case kYUVA_Color: |
105 SkASSERT(kOpaque_Alpha != alpha); | 112 SkASSERT(kOpaque_Alpha != alpha); |
106 SkASSERT(8 == bitsPerComponent); | 113 SkASSERT(8 == bitsPerComponent); |
107 break; | 114 break; |
108 default: | 115 case k565_Color: |
mtklein
2016/08/04 17:52:51
No need for defaults anymore?
msarett
2016/08/04 19:04:10
Yeah, all values of the enum are handled. This us
| |
109 SkASSERT(false); | 116 SkASSERT(kOpaque_Alpha == alpha); |
110 break; | 117 break; |
111 } | 118 } |
112 | 119 |
113 return SkEncodedInfo(color, alpha, bitsPerComponent); | 120 return SkEncodedInfo(color, alpha, bitsPerComponent); |
114 } | 121 } |
115 | 122 |
116 /* | 123 /* |
117 * Returns an SkImageInfo with Skia color and alpha types that are the | 124 * Returns an SkImageInfo with Skia color and alpha types that are the |
118 * closest possible match to the encoded info. | 125 * closest possible match to the encoded info. |
119 */ | 126 */ |
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141 case kYCCK_Color: | 148 case kYCCK_Color: |
142 SkASSERT(kOpaque_Alpha == fAlpha); | 149 SkASSERT(kOpaque_Alpha == fAlpha); |
143 return SkImageInfo::Make(width, height, kN32_SkColorType, | 150 return SkImageInfo::Make(width, height, kN32_SkColorType, |
144 kOpaque_SkAlphaType, colorSpace); | 151 kOpaque_SkAlphaType, colorSpace); |
145 case kRGBA_Color: | 152 case kRGBA_Color: |
146 case kBGRA_Color: | 153 case kBGRA_Color: |
147 case kYUVA_Color: | 154 case kYUVA_Color: |
148 SkASSERT(kOpaque_Alpha != fAlpha); | 155 SkASSERT(kOpaque_Alpha != fAlpha); |
149 return SkImageInfo::Make(width, height, kN32_SkColorType, | 156 return SkImageInfo::Make(width, height, kN32_SkColorType, |
150 kUnpremul_SkAlphaType, std::move(colorS pace)); | 157 kUnpremul_SkAlphaType, std::move(colorS pace)); |
151 default: | 158 case k565_Color: |
152 SkASSERT(false); | 159 SkASSERT(kOpaque_Alpha == fAlpha); |
153 return SkImageInfo::MakeUnknown(); | 160 return SkImageInfo::Make(width, height, kRGB_565_SkColorType, |
161 kOpaque_SkAlphaType, std::move(colorSpa ce)); | |
154 } | 162 } |
155 } | 163 } |
156 | 164 |
157 Color color() const { return fColor; } | 165 Color color() const { return fColor; } |
158 Alpha alpha() const { return fAlpha; } | 166 Alpha alpha() const { return fAlpha; } |
159 uint8_t bitsPerComponent() const { return fBitsPerComponent; } | 167 uint8_t bitsPerComponent() const { return fBitsPerComponent; } |
160 | 168 |
161 uint8_t bitsPerPixel() const { | 169 uint8_t bitsPerPixel() const { |
162 switch (fColor) { | 170 switch (fColor) { |
163 case kGray_Color: | 171 case kGray_Color: |
164 return fBitsPerComponent; | 172 return fBitsPerComponent; |
165 case kGrayAlpha_Color: | 173 case kGrayAlpha_Color: |
166 return 2 * fBitsPerComponent; | 174 return 2 * fBitsPerComponent; |
167 case kPalette_Color: | 175 case kPalette_Color: |
168 return fBitsPerComponent; | 176 return fBitsPerComponent; |
169 case kRGB_Color: | 177 case kRGB_Color: |
170 case kBGR_Color: | 178 case kBGR_Color: |
171 case kYUV_Color: | 179 case kYUV_Color: |
180 case k565_Color: | |
172 return 3 * fBitsPerComponent; | 181 return 3 * fBitsPerComponent; |
173 case kRGBA_Color: | 182 case kRGBA_Color: |
174 case kBGRA_Color: | 183 case kBGRA_Color: |
175 case kBGRX_Color: | 184 case kBGRX_Color: |
176 case kYUVA_Color: | 185 case kYUVA_Color: |
177 case kInvertedCMYK_Color: | 186 case kInvertedCMYK_Color: |
178 case kYCCK_Color: | 187 case kYCCK_Color: |
179 return 4 * fBitsPerComponent; | 188 return 4 * fBitsPerComponent; |
180 default: | 189 default: |
181 SkASSERT(false); | 190 SkASSERT(false); |
182 return 0; | 191 return 0; |
183 } | 192 } |
184 } | 193 } |
185 | 194 |
186 private: | 195 private: |
187 | 196 |
188 SkEncodedInfo(Color color, Alpha alpha, uint8_t bitsPerComponent) | 197 SkEncodedInfo(Color color, Alpha alpha, uint8_t bitsPerComponent) |
189 : fColor(color) | 198 : fColor(color) |
190 , fAlpha(alpha) | 199 , fAlpha(alpha) |
191 , fBitsPerComponent(bitsPerComponent) | 200 , fBitsPerComponent(bitsPerComponent) |
192 {} | 201 {} |
193 | 202 |
194 Color fColor; | 203 Color fColor; |
195 Alpha fAlpha; | 204 Alpha fAlpha; |
196 uint8_t fBitsPerComponent; | 205 uint8_t fBitsPerComponent; |
197 }; | 206 }; |
198 | 207 |
199 #endif | 208 #endif |
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