reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 2 | * Copyright 2006 The Android Open Source Project |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 3 | * |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #ifndef SkTypes_DEFINED |
| 9 | #define SkTypes_DEFINED |
| 10 | |
bungeman | f20488b | 2015-07-29 11:49:40 -0700 | [diff] [blame] | 11 | // IWYU pragma: begin_exports |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 12 | #include "SkPreConfig.h" |
| 13 | #include "SkUserConfig.h" |
| 14 | #include "SkPostConfig.h" |
bungeman | f20488b | 2015-07-29 11:49:40 -0700 | [diff] [blame] | 15 | #include <stddef.h> |
bungeman@google.com | fab44db | 2013-10-11 18:50:45 +0000 | [diff] [blame] | 16 | #include <stdint.h> |
bungeman | f20488b | 2015-07-29 11:49:40 -0700 | [diff] [blame] | 17 | // IWYU pragma: end_exports |
| 18 | |
bungeman | f20488b | 2015-07-29 11:49:40 -0700 | [diff] [blame] | 19 | #include <string.h> |
Mike Klein | 22ce794 | 2018-06-12 11:05:16 -0400 | [diff] [blame] | 20 | #include <utility> |
Mike Reed | ea5e676 | 2017-03-02 20:22:35 +0000 | [diff] [blame] | 21 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 22 | /** \file SkTypes.h |
| 23 | */ |
| 24 | |
reed@android.com | 9aa8b32 | 2010-04-13 13:22:54 +0000 | [diff] [blame] | 25 | /** See SkGraphics::GetVersion() to retrieve these at runtime |
| 26 | */ |
| 27 | #define SKIA_VERSION_MAJOR 1 |
| 28 | #define SKIA_VERSION_MINOR 0 |
| 29 | #define SKIA_VERSION_PATCH 0 |
| 30 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 31 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 32 | /** Called internally if we hit an unrecoverable error. |
| 33 | The platform implementation must not return, but should either throw |
| 34 | an exception or otherwise exit. |
| 35 | */ |
djsollen | f2b340f | 2016-01-29 08:51:04 -0800 | [diff] [blame] | 36 | SK_API extern void sk_abort_no_print(void); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 37 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 38 | #ifndef SkDebugf |
george | c4ade57 | 2014-08-01 12:02:07 -0700 | [diff] [blame] | 39 | SK_API void SkDebugf(const char format[], ...); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 40 | #endif |
| 41 | |
Mike Klein | 37bbfe3 | 2017-09-28 09:47:45 -0400 | [diff] [blame] | 42 | // SkASSERT, SkASSERTF and SkASSERT_RELEASE can be used as stand alone assertion expressions, e.g. |
| 43 | // uint32_t foo(int x) { |
| 44 | // SkASSERT(x > 4); |
| 45 | // return x - 4; |
| 46 | // } |
| 47 | // and are also written to be compatible with constexpr functions: |
| 48 | // constexpr uint32_t foo(int x) { |
| 49 | // return SkASSERT(x > 4), |
| 50 | // x - 4; |
| 51 | // } |
caryclark | d656200 | 2016-07-27 12:02:07 -0700 | [diff] [blame] | 52 | #define SkASSERT_RELEASE(cond) \ |
Mike Klein | 37bbfe3 | 2017-09-28 09:47:45 -0400 | [diff] [blame] | 53 | static_cast<void>( (cond) ? (void)0 : []{ SK_ABORT("assert(" #cond ")"); }() ) |
djsollen | f2b340f | 2016-01-29 08:51:04 -0800 | [diff] [blame] | 54 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 55 | #ifdef SK_DEBUG |
Mike Klein | 37bbfe3 | 2017-09-28 09:47:45 -0400 | [diff] [blame] | 56 | #define SkASSERT(cond) SkASSERT_RELEASE(cond) |
| 57 | #define SkASSERTF(cond, fmt, ...) static_cast<void>( (cond) ? (void)0 : [&]{ \ |
| 58 | SkDebugf(fmt"\n", __VA_ARGS__); \ |
| 59 | SK_ABORT("assert(" #cond ")"); \ |
| 60 | }() ) |
bungeman | 1f790aa | 2016-07-20 09:49:10 -0700 | [diff] [blame] | 61 | #define SkDEBUGFAIL(message) SK_ABORT(message) |
herb | 966e3d3 | 2015-09-18 07:00:48 -0700 | [diff] [blame] | 62 | #define SkDEBUGFAILF(fmt, ...) SkASSERTF(false, fmt, ##__VA_ARGS__) |
csmartdalton | ceeaa78 | 2016-08-10 10:07:57 -0700 | [diff] [blame] | 63 | #define SkDEBUGCODE(...) __VA_ARGS__ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 64 | #define SkDEBUGF(args ) SkDebugf args |
| 65 | #define SkAssertResult(cond) SkASSERT(cond) |
| 66 | #else |
Mike Klein | 37bbfe3 | 2017-09-28 09:47:45 -0400 | [diff] [blame] | 67 | #define SkASSERT(cond) static_cast<void>(0) |
| 68 | #define SkASSERTF(cond, fmt, ...) static_cast<void>(0) |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 69 | #define SkDEBUGFAIL(message) |
hstern | e6f8ff0 | 2016-08-15 15:26:31 -0700 | [diff] [blame] | 70 | #define SkDEBUGFAILF(fmt, ...) |
csmartdalton | ceeaa78 | 2016-08-10 10:07:57 -0700 | [diff] [blame] | 71 | #define SkDEBUGCODE(...) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 72 | #define SkDEBUGF(args) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 73 | |
bsalomon | 9daa4b9 | 2016-05-09 09:14:36 -0700 | [diff] [blame] | 74 | // unlike SkASSERT, this guy executes its condition in the non-debug build. |
bsalomon | 1b4c01c | 2016-05-09 12:35:17 -0700 | [diff] [blame] | 75 | // The if is present so that this can be used with functions marked SK_WARN_UNUSED_RESULT. |
| 76 | #define SkAssertResult(cond) if (cond) {} do {} while(false) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 77 | #endif |
| 78 | |
Hal Canary | bc718c1 | 2018-06-12 14:16:11 -0400 | [diff] [blame] | 79 | //////////////////////////////////////////////////////////////////////////////// |
| 80 | |
Cary Clark | 9988541 | 2018-04-05 13:09:58 -0400 | [diff] [blame] | 81 | // some clients (e.g. third_party/WebKit/Source/platform/fonts/FontCustomPlatformData.h) |
| 82 | // depend on SkString forward declaration below. Remove this once dependencies are fixed. |
| 83 | class SkString; |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 84 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 85 | /////////////////////////////////////////////////////////////////////// |
| 86 | |
reed@google.com | 37a3133 | 2011-01-25 14:55:42 +0000 | [diff] [blame] | 87 | /** |
reed@google.com | 37a3133 | 2011-01-25 14:55:42 +0000 | [diff] [blame] | 88 | * Fast type for unsigned 8 bits. Use for parameter passing and local |
| 89 | * variables, not for storage |
| 90 | */ |
| 91 | typedef unsigned U8CPU; |
| 92 | |
| 93 | /** |
| 94 | * Fast type for signed 16 bits. Use for parameter passing and local variables, |
| 95 | * not for storage |
| 96 | */ |
| 97 | typedef int S16CPU; |
| 98 | |
| 99 | /** |
| 100 | * Fast type for unsigned 16 bits. Use for parameter passing and local |
| 101 | * variables, not for storage |
| 102 | */ |
| 103 | typedef unsigned U16CPU; |
| 104 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 105 | /** Returns 0 or 1 based on the condition |
| 106 | */ |
Ben Wagner | 5b07178 | 2017-08-28 15:06:57 -0400 | [diff] [blame] | 107 | #define SkToBool(cond) ((cond) != 0) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 108 | |
| 109 | #define SK_MaxS16 32767 |
| 110 | #define SK_MinS16 -32767 |
| 111 | #define SK_MaxU16 0xFFFF |
| 112 | #define SK_MinU16 0 |
| 113 | #define SK_MaxS32 0x7FFFFFFF |
caryclark@google.com | 594dd3c | 2012-09-24 19:33:57 +0000 | [diff] [blame] | 114 | #define SK_MinS32 -SK_MaxS32 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 115 | #define SK_MaxU32 0xFFFFFFFF |
| 116 | #define SK_MinU32 0 |
caryclark | 952538e | 2016-02-26 05:01:42 -0800 | [diff] [blame] | 117 | #define SK_NaN32 ((int) (1U << 31)) |
Mike Reed | 7281801 | 2017-10-09 11:37:44 -0400 | [diff] [blame] | 118 | #define SK_MaxSizeT SIZE_MAX |
Mike Reed | 3d5a6b5 | 2018-01-31 15:55:47 -0500 | [diff] [blame] | 119 | static constexpr int64_t SK_MaxS64 = 0x7FFFFFFFFFFFFFFF; |
| 120 | static constexpr int64_t SK_MinS64 = -SK_MaxS64; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 121 | |
Hal Canary | bb9ee9b | 2018-06-12 16:47:47 -0400 | [diff] [blame^] | 122 | static inline constexpr int32_t SkLeftShift(int32_t value, int32_t shift) { |
caryclark | 3127c99 | 2015-12-09 12:02:30 -0800 | [diff] [blame] | 123 | return (int32_t) ((uint32_t) value << shift); |
| 124 | } |
| 125 | |
Hal Canary | bb9ee9b | 2018-06-12 16:47:47 -0400 | [diff] [blame^] | 126 | static inline constexpr int64_t SkLeftShift(int64_t value, int32_t shift) { |
caryclark | 3127c99 | 2015-12-09 12:02:30 -0800 | [diff] [blame] | 127 | return (int64_t) ((uint64_t) value << shift); |
| 128 | } |
| 129 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 130 | ////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 131 | |
mtklein | fc00a7c | 2015-05-07 10:58:44 -0700 | [diff] [blame] | 132 | /** Returns the number of entries in an array (not a pointer) */ |
| 133 | template <typename T, size_t N> char (&SkArrayCountHelper(T (&array)[N]))[N]; |
caryclark | 95b96d6 | 2015-08-19 10:12:59 -0700 | [diff] [blame] | 134 | #define SK_ARRAY_COUNT(array) (sizeof(SkArrayCountHelper(array))) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 135 | |
Hal Canary | bc718c1 | 2018-06-12 14:16:11 -0400 | [diff] [blame] | 136 | //////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 137 | |
Hal Canary | bb9ee9b | 2018-06-12 16:47:47 -0400 | [diff] [blame^] | 138 | template <typename T> static constexpr T SkAlign2(T x) { return (x + 1) >> 1 << 1; } |
| 139 | template <typename T> static constexpr T SkAlign4(T x) { return (x + 3) >> 2 << 2; } |
| 140 | template <typename T> static constexpr T SkAlign8(T x) { return (x + 7) >> 3 << 3; } |
reed@google.com | c6faa5a | 2012-06-27 15:07:11 +0000 | [diff] [blame] | 141 | |
Hal Canary | bb9ee9b | 2018-06-12 16:47:47 -0400 | [diff] [blame^] | 142 | template <typename T> static constexpr bool SkIsAlign2(T x) { return 0 == (x & 1); } |
| 143 | template <typename T> static constexpr bool SkIsAlign4(T x) { return 0 == (x & 3); } |
| 144 | template <typename T> static constexpr bool SkIsAlign8(T x) { return 0 == (x & 7); } |
tomhudson@google.com | 01224d5 | 2011-11-28 18:22:01 +0000 | [diff] [blame] | 145 | |
Hal Canary | bb9ee9b | 2018-06-12 16:47:47 -0400 | [diff] [blame^] | 146 | template <typename T> static constexpr T SkAlignPtr(T x) { |
Hal Canary | bc718c1 | 2018-06-12 14:16:11 -0400 | [diff] [blame] | 147 | return sizeof(void*) == 8 ? SkAlign8(x) : SkAlign4(x); |
| 148 | } |
Hal Canary | bb9ee9b | 2018-06-12 16:47:47 -0400 | [diff] [blame^] | 149 | template <typename T> static constexpr bool SkIsAlignPtr(T x) { |
Hal Canary | bc718c1 | 2018-06-12 14:16:11 -0400 | [diff] [blame] | 150 | return sizeof(void*) == 8 ? SkIsAlign8(x) : SkIsAlign4(x); |
| 151 | } |
mtklein | 0209e95 | 2014-08-28 14:10:05 -0700 | [diff] [blame] | 152 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 153 | typedef uint32_t SkFourByteTag; |
Hal Canary | bb9ee9b | 2018-06-12 16:47:47 -0400 | [diff] [blame^] | 154 | static inline constexpr SkFourByteTag SkSetFourByteTag(char a, char b, char c, char d) { |
Hal Canary | bc718c1 | 2018-06-12 14:16:11 -0400 | [diff] [blame] | 155 | return (((uint8_t)a << 24) | ((uint8_t)b << 16) | ((uint8_t)c << 8) | (uint8_t)d); |
| 156 | } |
| 157 | |
| 158 | //////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 159 | |
| 160 | /** 32 bit integer to hold a unicode value |
| 161 | */ |
| 162 | typedef int32_t SkUnichar; |
benjaminwagner | ec4d4d7 | 2016-03-25 12:59:53 -0700 | [diff] [blame] | 163 | |
halcanary | d0e95a5 | 2016-07-25 07:18:12 -0700 | [diff] [blame] | 164 | /** 16 bit unsigned integer to hold a glyph index |
| 165 | */ |
| 166 | typedef uint16_t SkGlyphID; |
| 167 | |
benjaminwagner | ec4d4d7 | 2016-03-25 12:59:53 -0700 | [diff] [blame] | 168 | /** 32 bit value to hold a millisecond duration |
| 169 | * Note that SK_MSecMax is about 25 days. |
| 170 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 171 | typedef uint32_t SkMSec; |
benjaminwagner | ec4d4d7 | 2016-03-25 12:59:53 -0700 | [diff] [blame] | 172 | /** maximum representable milliseconds; 24d 20h 31m 23.647s. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 173 | */ |
| 174 | #define SK_MSecMax 0x7FFFFFFF |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 175 | |
commit-bot@chromium.org | 2b4e370 | 2014-04-07 18:26:22 +0000 | [diff] [blame] | 176 | /** The generation IDs in Skia reserve 0 has an invalid marker. |
| 177 | */ |
| 178 | #define SK_InvalidGenID 0 |
bsalomon | 1c63bf6 | 2014-07-22 13:09:46 -0700 | [diff] [blame] | 179 | /** The unique IDs in Skia reserve 0 has an invalid marker. |
| 180 | */ |
| 181 | #define SK_InvalidUniqueID 0 |
commit-bot@chromium.org | 2b4e370 | 2014-04-07 18:26:22 +0000 | [diff] [blame] | 182 | |
bsalomon@google.com | ff43661 | 2013-02-27 19:07:32 +0000 | [diff] [blame] | 183 | /** Generic swap function. Classes with efficient swaps should specialize this function to take |
| 184 | their fast path. This function is used by SkTSort. */ |
Mike Klein | bde64e4 | 2016-11-14 08:39:39 -0500 | [diff] [blame] | 185 | template <typename T> static inline void SkTSwap(T& a, T& b) { |
bungeman | 6f4293a | 2016-10-26 12:11:28 -0700 | [diff] [blame] | 186 | T c(std::move(a)); |
| 187 | a = std::move(b); |
| 188 | b = std::move(c); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 189 | } |
| 190 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 191 | static inline int32_t SkAbs32(int32_t value) { |
mtklein | 09a22e9 | 2014-11-21 11:38:53 -0800 | [diff] [blame] | 192 | SkASSERT(value != SK_NaN32); // The most negative int32_t can't be negated. |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 193 | if (value < 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 194 | value = -value; |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 195 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 196 | return value; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 197 | } |
| 198 | |
Mike Klein | bde64e4 | 2016-11-14 08:39:39 -0500 | [diff] [blame] | 199 | template <typename T> static inline T SkTAbs(T value) { |
reed@google.com | 2b57dc6 | 2013-01-08 13:23:32 +0000 | [diff] [blame] | 200 | if (value < 0) { |
| 201 | value = -value; |
| 202 | } |
| 203 | return value; |
| 204 | } |
| 205 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 206 | static inline int32_t SkMax32(int32_t a, int32_t b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 207 | if (a < b) |
| 208 | a = b; |
| 209 | return a; |
| 210 | } |
| 211 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 212 | static inline int32_t SkMin32(int32_t a, int32_t b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 213 | if (a > b) |
| 214 | a = b; |
| 215 | return a; |
| 216 | } |
| 217 | |
halcanary | a0af771 | 2016-05-23 09:11:58 -0700 | [diff] [blame] | 218 | template <typename T> constexpr const T& SkTMin(const T& a, const T& b) { |
caryclark@google.com | 3b97af5 | 2013-04-23 11:56:44 +0000 | [diff] [blame] | 219 | return (a < b) ? a : b; |
| 220 | } |
| 221 | |
halcanary | a0af771 | 2016-05-23 09:11:58 -0700 | [diff] [blame] | 222 | template <typename T> constexpr const T& SkTMax(const T& a, const T& b) { |
caryclark@google.com | 3b97af5 | 2013-04-23 11:56:44 +0000 | [diff] [blame] | 223 | return (b < a) ? a : b; |
| 224 | } |
| 225 | |
reed@android.com | d457775 | 2009-11-21 02:48:11 +0000 | [diff] [blame] | 226 | static inline int32_t SkFastMin32(int32_t value, int32_t max) { |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 227 | if (value > max) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 228 | value = max; |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 229 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 230 | return value; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 231 | } |
| 232 | |
bungeman | 62ce030 | 2015-08-28 09:09:32 -0700 | [diff] [blame] | 233 | /** Returns value pinned between min and max, inclusively. */ |
halcanary | a0af771 | 2016-05-23 09:11:58 -0700 | [diff] [blame] | 234 | template <typename T> static constexpr const T& SkTPin(const T& value, const T& min, const T& max) { |
bungeman | 62ce030 | 2015-08-28 09:09:32 -0700 | [diff] [blame] | 235 | return SkTMax(SkTMin(value, max), min); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 236 | } |
| 237 | |
bsalomon | 5ec26ae | 2016-02-25 08:33:02 -0800 | [diff] [blame] | 238 | |
| 239 | /////////////////////////////////////////////////////////////////////////////// |
| 240 | |
| 241 | /** |
| 242 | * Indicates whether an allocation should count against a cache budget. |
| 243 | */ |
| 244 | enum class SkBudgeted : bool { |
| 245 | kNo = false, |
| 246 | kYes = true |
| 247 | }; |
| 248 | |
robertphillips | 76948d4 | 2016-05-04 12:47:41 -0700 | [diff] [blame] | 249 | /** |
| 250 | * Indicates whether a backing store needs to be an exact match or can be larger |
| 251 | * than is strictly necessary |
| 252 | */ |
| 253 | enum class SkBackingFit { |
| 254 | kApprox, |
| 255 | kExact |
| 256 | }; |
| 257 | |
reed@google.com | 1fcd51e | 2011-01-05 15:50:27 +0000 | [diff] [blame] | 258 | /////////////////////////////////////////////////////////////////////////////// |
| 259 | |
| 260 | /** |
| 261 | * Use to cast a pointer to a different type, and maintaining strict-aliasing |
| 262 | */ |
| 263 | template <typename Dst> Dst SkTCast(const void* ptr) { |
| 264 | union { |
| 265 | const void* src; |
| 266 | Dst dst; |
| 267 | } data; |
| 268 | data.src = ptr; |
| 269 | return data.dst; |
| 270 | } |
| 271 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 272 | ////////////////////////////////////////////////////////////////////////////// |
| 273 | |
| 274 | /** \class SkNoncopyable |
| 275 | |
fmalita | 055f6b5 | 2015-04-09 08:49:32 -0700 | [diff] [blame] | 276 | SkNoncopyable is the base class for objects that do not want to |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 277 | be copied. It hides its copy-constructor and its assignment-operator. |
| 278 | */ |
ctguil@chromium.org | 7ffb1b2 | 2011-03-15 21:27:08 +0000 | [diff] [blame] | 279 | class SK_API SkNoncopyable { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 280 | public: |
Chris Blume | 2b6be20 | 2017-04-25 17:33:13 -0700 | [diff] [blame] | 281 | SkNoncopyable() = default; |
reed@google.com | 1fcd51e | 2011-01-05 15:50:27 +0000 | [diff] [blame] | 282 | |
Chris Blume | 2b6be20 | 2017-04-25 17:33:13 -0700 | [diff] [blame] | 283 | SkNoncopyable(SkNoncopyable&&) = default; |
| 284 | SkNoncopyable& operator =(SkNoncopyable&&) = default; |
| 285 | |
| 286 | SkNoncopyable(const SkNoncopyable&) = delete; |
| 287 | SkNoncopyable& operator=(const SkNoncopyable&) = delete; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 288 | }; |
| 289 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 290 | #endif |