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Side by Side Diff: include/core/SkImageInfo.h

Issue 108993002: Revert "Revert "Revert "PixelRef now returns (nearly) everything that is currently in SkBitmap. The… (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: Created 7 years ago
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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
11 #include "SkTypes.h" 11 #include "SkTypes.h"
12 12
13 class SkFlattenableWriteBuffer;
14 class SkFlattenableReadBuffer;
15
16 /** 13 /**
17 * Describes how to interpret the alpha compoent of a pixel. 14 * Describes how to interpret the alpha compoent of a pixel.
18 */ 15 */
19 enum SkAlphaType { 16 enum SkAlphaType {
20 /** 17 /**
21 * All pixels should be treated as opaque, regardless of the value stored 18 * All pixels should be treated as opaque, regardless of the value stored
22 * in their alpha field. Used for legacy images that wrote 0 or garbarge 19 * in their alpha field. Used for legacy images that wrote 0 or garbarge
23 * in their alpha field, but intended the RGB to be treated as opaque. 20 * in their alpha field, but intended the RGB to be treated as opaque.
24 */ 21 */
25 kIgnore_SkAlphaType, 22 kIgnore_SkAlphaType,
(...skipping 33 matching lines...) Expand 10 before | Expand all | Expand 10 after
59 } 56 }
60 57
61 /////////////////////////////////////////////////////////////////////////////// 58 ///////////////////////////////////////////////////////////////////////////////
62 59
63 /** 60 /**
64 * Describes how to interpret the components of a pixel. 61 * Describes how to interpret the components of a pixel.
65 */ 62 */
66 enum SkColorType { 63 enum SkColorType {
67 kAlpha_8_SkColorType, 64 kAlpha_8_SkColorType,
68 kRGB_565_SkColorType, 65 kRGB_565_SkColorType,
69 kARGB_4444_SkColorType,
70 kRGBA_8888_SkColorType, 66 kRGBA_8888_SkColorType,
71 kBGRA_8888_SkColorType, 67 kBGRA_8888_SkColorType,
72 kIndex8_SkColorType, 68 kIndex8_SkColorType,
73 69
74 kLastEnum_SkColorType = kIndex8_SkColorType, 70 kLastEnum_SkColorType = kIndex8_SkColorType,
75 71
76 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) 72 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
77 kPMColor_SkColorType = kBGRA_8888_SkColorType 73 kPMColor_SkColorType = kBGRA_8888_SkColorType
78 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) 74 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
79 kPMColor_SkColorType = kRGBA_8888_SkColorType 75 kPMColor_SkColorType = kRGBA_8888_SkColorType
80 #else 76 #else
81 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order" 77 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order"
82 #endif 78 #endif
83 }; 79 };
84 80
85 static int SkColorTypeBytesPerPixel(SkColorType ct) { 81 static int SkColorTypeBytesPerPixel(SkColorType ct) {
86 static const uint8_t gSize[] = { 82 static const uint8_t gSize[] = {
87 1, // Alpha_8 83 1, // Alpha_8
88 2, // RGB_565 84 2, // RGB_565
89 2, // ARGB_4444
90 4, // RGBA_8888 85 4, // RGBA_8888
91 4, // BGRA_8888 86 4, // BGRA_8888
92 1, // kIndex_8 87 1, // kIndex_8
93 }; 88 };
94 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType + 1), 89 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType + 1),
95 size_mismatch_with_SkColorType_enum); 90 size_mismatch_with_SkColorType_enum);
96 91
97 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize)); 92 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize));
98 return gSize[ct]; 93 return gSize[ct];
99 } 94 }
(...skipping 10 matching lines...) Expand all
110 SkAlphaType fAlphaType; 105 SkAlphaType fAlphaType;
111 106
112 bool isOpaque() const { 107 bool isOpaque() const {
113 return SkAlphaTypeIsOpaque(fAlphaType); 108 return SkAlphaTypeIsOpaque(fAlphaType);
114 } 109 }
115 110
116 int bytesPerPixel() const { 111 int bytesPerPixel() const {
117 return SkColorTypeBytesPerPixel(fColorType); 112 return SkColorTypeBytesPerPixel(fColorType);
118 } 113 }
119 114
120 size_t minRowBytes() const {
121 return fWidth * this->bytesPerPixel();
122 }
123
124 bool operator==(const SkImageInfo& other) const { 115 bool operator==(const SkImageInfo& other) const {
125 return 0 == memcmp(this, &other, sizeof(other)); 116 return 0 == memcmp(this, &other, sizeof(other));
126 } 117 }
127 bool operator!=(const SkImageInfo& other) const { 118 bool operator!=(const SkImageInfo& other) const {
128 return 0 != memcmp(this, &other, sizeof(other)); 119 return 0 != memcmp(this, &other, sizeof(other));
129 } 120 }
130
131 void unflatten(SkFlattenableReadBuffer&);
132 void flatten(SkFlattenableWriteBuffer&) const;
133
134 size_t getSafeSize(size_t rowBytes) const {
135 if (0 == fHeight) {
136 return 0;
137 }
138 return (fHeight - 1) * rowBytes + fWidth * this->bytesPerPixel();
139 }
140 }; 121 };
141 122
142 #endif 123 #endif
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