OLD | NEW |
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 |
11 #include "SkMath.h" | 11 #include "SkTypes.h" |
12 #include "SkSize.h" | 12 #include "SkSize.h" |
13 | 13 |
14 class SkWriteBuffer; | 14 class SkWriteBuffer; |
15 class SkReadBuffer; | 15 class SkReadBuffer; |
16 | 16 |
17 /** | 17 /** |
18 * Describes how to interpret the alpha compoent of a pixel. | 18 * Describes how to interpret the alpha compoent of a pixel. |
19 */ | 19 */ |
20 enum SkAlphaType { | 20 enum SkAlphaType { |
21 /** | 21 /** |
(...skipping 30 matching lines...) Expand all Loading... |
52 }; | 52 }; |
53 | 53 |
54 static inline bool SkAlphaTypeIsOpaque(SkAlphaType at) { | 54 static inline bool SkAlphaTypeIsOpaque(SkAlphaType at) { |
55 SK_COMPILE_ASSERT(kIgnore_SkAlphaType < kOpaque_SkAlphaType, bad_alphatype_o
rder); | 55 SK_COMPILE_ASSERT(kIgnore_SkAlphaType < kOpaque_SkAlphaType, bad_alphatype_o
rder); |
56 SK_COMPILE_ASSERT(kPremul_SkAlphaType > kOpaque_SkAlphaType, bad_alphatype_o
rder); | 56 SK_COMPILE_ASSERT(kPremul_SkAlphaType > kOpaque_SkAlphaType, bad_alphatype_o
rder); |
57 SK_COMPILE_ASSERT(kUnpremul_SkAlphaType > kOpaque_SkAlphaType, bad_alphatype
_order); | 57 SK_COMPILE_ASSERT(kUnpremul_SkAlphaType > kOpaque_SkAlphaType, bad_alphatype
_order); |
58 | 58 |
59 return (unsigned)at <= kOpaque_SkAlphaType; | 59 return (unsigned)at <= kOpaque_SkAlphaType; |
60 } | 60 } |
61 | 61 |
62 static inline bool SkAlphaTypeIsValid(unsigned value) { | |
63 return value <= kLastEnum_SkAlphaType; | |
64 } | |
65 | |
66 /////////////////////////////////////////////////////////////////////////////// | 62 /////////////////////////////////////////////////////////////////////////////// |
67 | 63 |
68 /** | 64 /** |
69 * Describes how to interpret the components of a pixel. | 65 * Describes how to interpret the components of a pixel. |
70 */ | 66 */ |
71 enum SkColorType { | 67 enum SkColorType { |
72 kUnknown_SkColorType, | |
73 kAlpha_8_SkColorType, | 68 kAlpha_8_SkColorType, |
74 kRGB_565_SkColorType, | 69 kRGB_565_SkColorType, |
75 kARGB_4444_SkColorType, | 70 kARGB_4444_SkColorType, |
76 kRGBA_8888_SkColorType, | 71 kRGBA_8888_SkColorType, |
77 kBGRA_8888_SkColorType, | 72 kBGRA_8888_SkColorType, |
78 kIndex_8_SkColorType, | 73 kIndex_8_SkColorType, |
79 | 74 |
80 kLastEnum_SkColorType = kIndex_8_SkColorType, | 75 kLastEnum_SkColorType = kIndex_8_SkColorType, |
81 | 76 |
82 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) | 77 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) |
83 kPMColor_SkColorType = kBGRA_8888_SkColorType | 78 kPMColor_SkColorType = kBGRA_8888_SkColorType |
84 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) | 79 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) |
85 kPMColor_SkColorType = kRGBA_8888_SkColorType | 80 kPMColor_SkColorType = kRGBA_8888_SkColorType |
86 #else | 81 #else |
87 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order" | 82 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order" |
88 #endif | 83 #endif |
89 }; | 84 }; |
90 | 85 |
91 static int SkColorTypeBytesPerPixel(SkColorType ct) { | 86 static int SkColorTypeBytesPerPixel(SkColorType ct) { |
92 static const uint8_t gSize[] = { | 87 static const uint8_t gSize[] = { |
93 0, // Unknown | |
94 1, // Alpha_8 | 88 1, // Alpha_8 |
95 2, // RGB_565 | 89 2, // RGB_565 |
96 2, // ARGB_4444 | 90 2, // ARGB_4444 |
97 4, // RGBA_8888 | 91 4, // RGBA_8888 |
98 4, // BGRA_8888 | 92 4, // BGRA_8888 |
99 1, // kIndex_8 | 93 1, // kIndex_8 |
100 }; | 94 }; |
101 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType +
1), | 95 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType +
1), |
102 size_mismatch_with_SkColorType_enum); | 96 size_mismatch_with_SkColorType_enum); |
103 | 97 |
104 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize)); | 98 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize)); |
105 return gSize[ct]; | 99 return gSize[ct]; |
106 } | 100 } |
107 | 101 |
108 static inline size_t SkColorTypeMinRowBytes(SkColorType ct, int width) { | |
109 return width * SkColorTypeBytesPerPixel(ct); | |
110 } | |
111 | |
112 static inline bool SkColorTypeIsValid(unsigned value) { | |
113 return value <= kLastEnum_SkColorType; | |
114 } | |
115 | |
116 /////////////////////////////////////////////////////////////////////////////// | 102 /////////////////////////////////////////////////////////////////////////////// |
117 | 103 |
118 /** | 104 /** |
119 * Describe an image's dimensions and pixel type. | 105 * Describe an image's dimensions and pixel type. |
120 */ | 106 */ |
121 struct SkImageInfo { | 107 struct SkImageInfo { |
122 int fWidth; | 108 int fWidth; |
123 int fHeight; | 109 int fHeight; |
124 SkColorType fColorType; | 110 SkColorType fColorType; |
125 SkAlphaType fAlphaType; | 111 SkAlphaType fAlphaType; |
(...skipping 40 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
166 | 152 |
167 static SkImageInfo MakeA8(int width, int height) { | 153 static SkImageInfo MakeA8(int width, int height) { |
168 SkASSERT(width >= 0); | 154 SkASSERT(width >= 0); |
169 SkASSERT(height >= 0); | 155 SkASSERT(height >= 0); |
170 SkImageInfo info = { | 156 SkImageInfo info = { |
171 width, height, kAlpha_8_SkColorType, kPremul_SkAlphaType | 157 width, height, kAlpha_8_SkColorType, kPremul_SkAlphaType |
172 }; | 158 }; |
173 return info; | 159 return info; |
174 } | 160 } |
175 | 161 |
176 int width() const { return fWidth; } | |
177 int height() const { return fHeight; } | |
178 SkColorType colorType() const { return fColorType; } | |
179 SkAlphaType alphaType() const { return fAlphaType; } | |
180 | |
181 bool isEmpty() const { return fWidth <= 0 || fHeight <= 0; } | |
182 | |
183 bool isOpaque() const { | 162 bool isOpaque() const { |
184 return SkAlphaTypeIsOpaque(fAlphaType); | 163 return SkAlphaTypeIsOpaque(fAlphaType); |
185 } | 164 } |
186 | 165 |
187 SkISize dimensions() const { return SkISize::Make(fWidth, fHeight); } | |
188 | |
189 int bytesPerPixel() const { | 166 int bytesPerPixel() const { |
190 return SkColorTypeBytesPerPixel(fColorType); | 167 return SkColorTypeBytesPerPixel(fColorType); |
191 } | 168 } |
192 | 169 |
193 uint64_t minRowBytes64() const { | |
194 return sk_64_mul(fWidth, this->bytesPerPixel()); | |
195 } | |
196 | |
197 size_t minRowBytes() const { | 170 size_t minRowBytes() const { |
198 return (size_t)this->minRowBytes64(); | 171 return fWidth * this->bytesPerPixel(); |
199 } | 172 } |
200 | 173 |
201 bool operator==(const SkImageInfo& other) const { | 174 bool operator==(const SkImageInfo& other) const { |
202 return 0 == memcmp(this, &other, sizeof(other)); | 175 return 0 == memcmp(this, &other, sizeof(other)); |
203 } | 176 } |
204 bool operator!=(const SkImageInfo& other) const { | 177 bool operator!=(const SkImageInfo& other) const { |
205 return 0 != memcmp(this, &other, sizeof(other)); | 178 return 0 != memcmp(this, &other, sizeof(other)); |
206 } | 179 } |
207 | 180 |
208 void unflatten(SkReadBuffer&); | 181 void unflatten(SkReadBuffer&); |
209 void flatten(SkWriteBuffer&) const; | 182 void flatten(SkWriteBuffer&) const; |
210 | 183 |
211 int64_t getSafeSize64(size_t rowBytes) const { | 184 size_t getSafeSize(size_t rowBytes) const { |
212 if (0 == fHeight) { | 185 if (0 == fHeight) { |
213 return 0; | 186 return 0; |
214 } | 187 } |
215 return sk_64_mul(fHeight - 1, rowBytes) + fWidth * this->bytesPerPixel()
; | 188 return (fHeight - 1) * rowBytes + fWidth * this->bytesPerPixel(); |
216 } | 189 } |
217 | |
218 size_t getSafeSize(size_t rowBytes) const { | |
219 return (size_t)this->getSafeSize64(rowBytes); | |
220 } | |
221 | |
222 bool validRowBytes(size_t rowBytes) const { | |
223 uint64_t rb = sk_64_mul(fWidth, this->bytesPerPixel()); | |
224 return rowBytes >= rb; | |
225 } | |
226 | |
227 SkDEBUGCODE(void validate() const;) | |
228 }; | 190 }; |
229 | 191 |
230 #endif | 192 #endif |
OLD | NEW |