1 /*
2 * Copyright 2006 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #ifndef SkTypes_DEFINED
9 #define SkTypes_DEFINED
10
11 /** \file SkTypes.h
12 */
13
14 // Pre-SkUserConfig.h setup.
15
16 // Allows embedders that want to disable macros that take arguments to just
17 // define that symbol to be one of these
18 #define SK_NOTHING_ARG1(arg1)
19 #define SK_NOTHING_ARG2(arg1, arg2)
20 #define SK_NOTHING_ARG3(arg1, arg2, arg3)
21
22 #if !defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_WIN) && \
23 !defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_MAC) && !defined(SK_BUILD_FOR_OHOS)
24
25 #ifdef __APPLE__
26 #include <TargetConditionals.h>
27 #endif
28
29 #if defined(_WIN32) || defined(__SYMBIAN32__)
30 #define SK_BUILD_FOR_WIN
31 #elif defined(ANDROID) || defined(__ANDROID__)
32
33 #elif defined(linux) || defined(__linux) || defined(__FreeBSD__) || \
34 defined(__OpenBSD__) || defined(__sun) || defined(__NetBSD__) || \
35 defined(__DragonFly__) || defined(__Fuchsia__) || \
36 defined(__GLIBC__) || defined(__GNU__) || defined(__unix__)
37
38 #elif TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
39 #define SK_BUILD_FOR_IOS
40 #else
41 #define SK_BUILD_FOR_MAC
42 #endif
43
44 #endif
45
46 #if defined(SK_BUILD_FOR_WIN) && !defined(__clang__)
47 #if !defined(SK_RESTRICT)
48 #define SK_RESTRICT __restrict
49 #endif
50 #if !defined(SK_WARN_UNUSED_RESULT)
51 #define SK_WARN_UNUSED_RESULT
52 #endif
53 #endif
54
55 #if !defined(SK_RESTRICT)
56 #define SK_RESTRICT __restrict__
57 #endif
58
59 #if !defined(SK_WARN_UNUSED_RESULT)
60 #define SK_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
61 #endif
62
63 #if !defined(SK_CPU_BENDIAN) && !defined(SK_CPU_LENDIAN)
64 #if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
65 #define SK_CPU_BENDIAN
66 #elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
67 #define SK_CPU_LENDIAN
68 #elif defined(__sparc) || defined(__sparc__) || \
69 defined(_POWER) || defined(__powerpc__) || \
70 defined(__ppc__) || defined(__hppa) || \
71 defined(__PPC__) || defined(__PPC64__) || \
72 defined(_MIPSEB) || defined(__ARMEB__) || \
73 defined(__s390__) || \
74 (defined(__sh__) && defined(__BIG_ENDIAN__)) || \
75 (defined(__ia64) && defined(__BIG_ENDIAN__))
76 #define SK_CPU_BENDIAN
77 #else
78 #define SK_CPU_LENDIAN
79 #endif
80 #endif
81
82 #if defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)
83 #define SK_CPU_X86 1
84 #endif
85
86 /**
87 * SK_CPU_SSE_LEVEL
88 *
89 * If defined, SK_CPU_SSE_LEVEL should be set to the highest supported level.
90 * On non-intel CPU this should be undefined.
91 */
92 #define SK_CPU_SSE_LEVEL_SSE1 10
93 #define SK_CPU_SSE_LEVEL_SSE2 20
94 #define SK_CPU_SSE_LEVEL_SSE3 30
95 #define SK_CPU_SSE_LEVEL_SSSE3 31
96 #define SK_CPU_SSE_LEVEL_SSE41 41
97 #define SK_CPU_SSE_LEVEL_SSE42 42
98 #define SK_CPU_SSE_LEVEL_AVX 51
99 #define SK_CPU_SSE_LEVEL_AVX2 52
100 #define SK_CPU_SSE_LEVEL_SKX 60
101
102 // Are we in GCC/Clang?
103 #ifndef SK_CPU_SSE_LEVEL
104 // These checks must be done in descending order to ensure we set the highest
105 // available SSE level.
106 #if defined(__AVX512F__) && defined(__AVX512DQ__) && defined(__AVX512CD__) && \
107 defined(__AVX512BW__) && defined(__AVX512VL__)
108 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SKX
109 #elif defined(__AVX2__)
110 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2
111 #elif defined(__AVX__)
112 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX
113 #elif defined(__SSE4_2__)
114 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE42
115 #elif defined(__SSE4_1__)
116 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE41
117 #elif defined(__SSSE3__)
118 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSSE3
119 #elif defined(__SSE3__)
120 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE3
121 #elif defined(__SSE2__)
122 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
123 #endif
124 #endif
125
126 // Are we in VisualStudio?
127 #ifndef SK_CPU_SSE_LEVEL
128 // These checks must be done in descending order to ensure we set the highest
129 // available SSE level. 64-bit intel guarantees at least SSE2 support.
130 #if defined(__AVX512F__) && defined(__AVX512DQ__) && defined(__AVX512CD__) && \
131 defined(__AVX512BW__) && defined(__AVX512VL__)
132 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SKX
133 #elif defined(__AVX2__)
134 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2
135 #elif defined(__AVX__)
136 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX
137 #elif defined(_M_X64) || defined(_M_AMD64)
138 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
139 #elif defined(_M_IX86_FP)
140 #if _M_IX86_FP >= 2
141 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
142 #elif _M_IX86_FP == 1
143 #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE1
144 #endif
145 #endif
146 #endif
147
148 // ARM defines
149 #if defined(__arm__) && (!defined(__APPLE__) || !TARGET_IPHONE_SIMULATOR)
150 #define SK_CPU_ARM32
151 #elif defined(__aarch64__)
152 #define SK_CPU_ARM64
153 #endif
154
155 // All 64-bit ARM chips have NEON. Many 32-bit ARM chips do too.
156 #if !defined(SK_ARM_HAS_NEON) && defined(__ARM_NEON)
157 #define SK_ARM_HAS_NEON
158 #endif
159
160 #if defined(__ARM_FEATURE_CRC32)
161 #define SK_ARM_HAS_CRC32
162 #endif
163
164
165 // DLL/.so exports.
166 #if !defined(SKIA_IMPLEMENTATION)
167 #define SKIA_IMPLEMENTATION 0
168 #endif
169 #if !defined(SK_API)
170 #if defined(SKIA_DLL)
171 #if defined(_MSC_VER)
172 #if SKIA_IMPLEMENTATION
173 #define SK_API __declspec(dllexport)
174 #else
175 #define SK_API __declspec(dllimport)
176 #endif
177 #else
178 #define SK_API __attribute__((visibility("default")))
179 #endif
180 #else
181 #define SK_API
182 #endif
183 #endif
184
185 // SK_SPI is functionally identical to SK_API, but used within src to clarify that it's less stable
186 #if !defined(SK_SPI)
187 #define SK_SPI SK_API
188 #endif
189
190 // IWYU pragma: begin_exports
191 #if defined (SK_USER_CONFIG_HEADER)
192 #include SK_USER_CONFIG_HEADER
193 #else
194 #include "include/config/SkUserConfig.h"
195 #endif
196 #include <stddef.h>
197 #include <stdint.h>
198 // IWYU pragma: end_exports
199
200 // Post SkUserConfig.h checks and such.
201 #if !defined(SK_DEBUG) && !defined(SK_RELEASE)
202 #ifdef NDEBUG
203 #define SK_RELEASE
204 #else
205 #define SK_DEBUG
206 #endif
207 #endif
208
209 #if defined(SK_DEBUG) && defined(SK_RELEASE)
210 # error "cannot define both SK_DEBUG and SK_RELEASE"
211 #elif !defined(SK_DEBUG) && !defined(SK_RELEASE)
212 # error "must define either SK_DEBUG or SK_RELEASE"
213 #endif
214
215 #if defined(SK_CPU_LENDIAN) && defined(SK_CPU_BENDIAN)
216 # error "cannot define both SK_CPU_LENDIAN and SK_CPU_BENDIAN"
217 #elif !defined(SK_CPU_LENDIAN) && !defined(SK_CPU_BENDIAN)
218 # error "must define either SK_CPU_LENDIAN or SK_CPU_BENDIAN"
219 #endif
220
221 #if defined(SK_CPU_BENDIAN) && !defined(I_ACKNOWLEDGE_SKIA_DOES_NOT_SUPPORT_BIG_ENDIAN)
222 #error "The Skia team is not endian-savvy enough to support big-endian CPUs."
223 #error "If you still want to use Skia,"
224 #error "please define I_ACKNOWLEDGE_SKIA_DOES_NOT_SUPPORT_BIG_ENDIAN."
225 #endif
226
227 #if !defined(SK_ATTRIBUTE)
228 # if defined(__clang__) || defined(__GNUC__)
229 # define SK_ATTRIBUTE(attr) __attribute__((attr))
230 # else
231 # define SK_ATTRIBUTE(attr)
232 # endif
233 #endif
234
235 #if !defined(SK_SUPPORT_GPU)
236 # define SK_SUPPORT_GPU true
237 #endif
238
239 #if SK_SUPPORT_GPU || SK_GRAPHITE_ENABLED
240 # if !defined(SK_ENABLE_SKSL)
241 # define SK_ENABLE_SKSL
242 # endif
243 #else
244 # undef SK_GL
245 # undef SK_VULKAN
246 # undef SK_METAL
247 # undef SK_DAWN
248 # undef SK_DIRECT3D
249 #endif
250
251 #if !defined(SkUNREACHABLE)
252 # if defined(_MSC_VER) && !defined(__clang__)
253 # include <intrin.h>
254 # define FAST_FAIL_INVALID_ARG 5
255 // See https://developercommunity.visualstudio.com/content/problem/1128631/code-flow-doesnt-see-noreturn-with-extern-c.html
256 // for why this is wrapped. Hopefully removable after msvc++ 19.27 is no longer supported.
sk_fast_fail()257 [[noreturn]] static inline void sk_fast_fail() { __fastfail(FAST_FAIL_INVALID_ARG); }
258 # define SkUNREACHABLE sk_fast_fail()
259 # else
260 # define SkUNREACHABLE __builtin_trap()
261 # endif
262 #endif
263
264 #if defined(SK_BUILD_FOR_GOOGLE3)
265 void SkDebugfForDumpStackTrace(const char* data, void* unused);
266 void DumpStackTrace(int skip_count, void w(const char*, void*), void* arg);
267 # define SK_DUMP_GOOGLE3_STACK() DumpStackTrace(0, SkDebugfForDumpStackTrace, nullptr)
268 #else
269 # define SK_DUMP_GOOGLE3_STACK()
270 #endif
271
272 #ifndef SK_ABORT
273 # ifdef SK_BUILD_FOR_WIN
274 // This style lets Visual Studio follow errors back to the source file.
275 # define SK_DUMP_LINE_FORMAT "%s(%d)"
276 # else
277 # define SK_DUMP_LINE_FORMAT "%s:%d"
278 # endif
279 # ifdef SK_BUILD_FOR_OHOS
280 # define SK_ABORT(message, ...)
281 # else
282 # define SK_ABORT(message, ...) \
283 do { \
284 SkDebugf(SK_DUMP_LINE_FORMAT ": fatal error: \"" message "\"\n", \
285 __FILE__, __LINE__, ##__VA_ARGS__); \
286 SK_DUMP_GOOGLE3_STACK(); \
287 sk_abort_no_print(); \
288 } while (false)
289 # endif
290 #endif
291
292 // If SK_R32_SHIFT is set, we'll use that to choose RGBA or BGRA.
293 // If not, we'll default to RGBA everywhere except BGRA on Windows.
294 #if defined(SK_R32_SHIFT)
295 static_assert(SK_R32_SHIFT == 0 || SK_R32_SHIFT == 16, "");
296 #elif defined(SK_BUILD_FOR_WIN)
297 #define SK_R32_SHIFT 16
298 #else
299 #define SK_R32_SHIFT 0
300 #endif
301
302 #if defined(SK_B32_SHIFT)
303 static_assert(SK_B32_SHIFT == (16-SK_R32_SHIFT), "");
304 #else
305 #define SK_B32_SHIFT (16-SK_R32_SHIFT)
306 #endif
307
308 #define SK_G32_SHIFT 8
309 #define SK_A32_SHIFT 24
310
311
312 /**
313 * SK_PMCOLOR_BYTE_ORDER can be used to query the byte order of SkPMColor at compile time.
314 */
315 #ifdef SK_CPU_BENDIAN
316 # define SK_PMCOLOR_BYTE_ORDER(C0, C1, C2, C3) \
317 (SK_ ## C3 ## 32_SHIFT == 0 && \
318 SK_ ## C2 ## 32_SHIFT == 8 && \
319 SK_ ## C1 ## 32_SHIFT == 16 && \
320 SK_ ## C0 ## 32_SHIFT == 24)
321 #else
322 # define SK_PMCOLOR_BYTE_ORDER(C0, C1, C2, C3) \
323 (SK_ ## C0 ## 32_SHIFT == 0 && \
324 SK_ ## C1 ## 32_SHIFT == 8 && \
325 SK_ ## C2 ## 32_SHIFT == 16 && \
326 SK_ ## C3 ## 32_SHIFT == 24)
327 #endif
328
329 #if defined SK_DEBUG && defined SK_BUILD_FOR_WIN
330 #ifdef free
331 #undef free
332 #endif
333 #include <crtdbg.h>
334 #undef free
335 #endif
336
337 #if !defined(SK_UNUSED)
338 # if !defined(__clang__) && defined(_MSC_VER)
339 # define SK_UNUSED __pragma(warning(suppress:4189))
340 # else
341 # define SK_UNUSED SK_ATTRIBUTE(unused)
342 # endif
343 #endif
344
345 #if !defined(SK_MAYBE_UNUSED)
346 # if defined(__clang__) || defined(__GNUC__)
347 # define SK_MAYBE_UNUSED [[maybe_unused]]
348 # else
349 # define SK_MAYBE_UNUSED
350 # endif
351 #endif
352
353 /**
354 * If your judgment is better than the compiler's (i.e. you've profiled it),
355 * you can use SK_ALWAYS_INLINE to force inlining. E.g.
356 * inline void someMethod() { ... } // may not be inlined
357 * SK_ALWAYS_INLINE void someMethod() { ... } // should always be inlined
358 */
359 #if !defined(SK_ALWAYS_INLINE)
360 # if defined(SK_BUILD_FOR_WIN)
361 # define SK_ALWAYS_INLINE __forceinline
362 # else
363 # define SK_ALWAYS_INLINE SK_ATTRIBUTE(always_inline) inline
364 # endif
365 #endif
366
367 /**
368 * If your judgment is better than the compiler's (i.e. you've profiled it),
369 * you can use SK_NEVER_INLINE to prevent inlining.
370 */
371 #if !defined(SK_NEVER_INLINE)
372 # if defined(SK_BUILD_FOR_WIN)
373 # define SK_NEVER_INLINE __declspec(noinline)
374 # else
375 # define SK_NEVER_INLINE SK_ATTRIBUTE(noinline)
376 # endif
377 #endif
378
379 #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1
380 #define SK_PREFETCH(ptr) _mm_prefetch(reinterpret_cast<const char*>(ptr), _MM_HINT_T0)
381 #elif defined(__GNUC__)
382 #define SK_PREFETCH(ptr) __builtin_prefetch(ptr)
383 #else
384 #define SK_PREFETCH(ptr)
385 #endif
386
387 #ifndef SK_PRINTF_LIKE
388 # if defined(__clang__) || defined(__GNUC__)
389 # define SK_PRINTF_LIKE(A, B) __attribute__((format(printf, (A), (B))))
390 # else
391 # define SK_PRINTF_LIKE(A, B)
392 # endif
393 #endif
394
395 #ifndef SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
396 #define SK_ALLOW_STATIC_GLOBAL_INITIALIZERS 0
397 #endif
398
399 #if !defined(SK_GAMMA_EXPONENT)
400 #define SK_GAMMA_EXPONENT (0.0f) // SRGB
401 #endif
402
403 #ifndef GR_TEST_UTILS
404 # define GR_TEST_UTILS 0
405 #endif
406
407 #ifndef SK_GPU_V1
408 # define SK_GPU_V1 1
409 #endif
410
411 #if defined(SK_HISTOGRAM_ENUMERATION) || \
412 defined(SK_HISTOGRAM_BOOLEAN) || \
413 defined(SK_HISTOGRAM_EXACT_LINEAR) || \
414 defined(SK_HISTOGRAM_MEMORY_KB)
415 # define SK_HISTOGRAMS_ENABLED 1
416 #else
417 # define SK_HISTOGRAMS_ENABLED 0
418 #endif
419
420 #ifndef SK_HISTOGRAM_BOOLEAN
421 # define SK_HISTOGRAM_BOOLEAN(name, sample)
422 #endif
423
424 #ifndef SK_HISTOGRAM_ENUMERATION
425 # define SK_HISTOGRAM_ENUMERATION(name, sample, enum_size)
426 #endif
427
428 #ifndef SK_HISTOGRAM_EXACT_LINEAR
429 # define SK_HISTOGRAM_EXACT_LINEAR(name, sample, value_max)
430 #endif
431
432 #ifndef SK_HISTOGRAM_MEMORY_KB
433 # define SK_HISTOGRAM_MEMORY_KB(name, sample)
434 #endif
435
436 #define SK_HISTOGRAM_PERCENTAGE(name, percent_as_int) \
437 SK_HISTOGRAM_EXACT_LINEAR(name, percent_as_int, 101)
438
439 #ifndef SK_DISABLE_LEGACY_SHADERCONTEXT
440 #define SK_ENABLE_LEGACY_SHADERCONTEXT
441 #endif
442
443 #ifdef SK_ENABLE_API_AVAILABLE
444 #define SK_API_AVAILABLE API_AVAILABLE
445 #else
446 #define SK_API_AVAILABLE(...)
447 #endif
448
449 #if defined(SK_BUILD_FOR_LIBFUZZER) || defined(SK_BUILD_FOR_AFL_FUZZ)
450 #define SK_BUILD_FOR_FUZZER
451 #endif
452
453 /** Called internally if we hit an unrecoverable error.
454 The platform implementation must not return, but should either throw
455 an exception or otherwise exit.
456 */
457 [[noreturn]] SK_API extern void sk_abort_no_print(void);
458
459 #ifndef SkDebugf
460 SK_API void SkDebugf(const char format[], ...) SK_PRINTF_LIKE(1, 2);
461 #endif
462
463 // SkASSERT, SkASSERTF and SkASSERT_RELEASE can be used as stand alone assertion expressions, e.g.
464 // uint32_t foo(int x) {
465 // SkASSERT(x > 4);
466 // return x - 4;
467 // }
468 // and are also written to be compatible with constexpr functions:
469 // constexpr uint32_t foo(int x) {
470 // return SkASSERT(x > 4),
471 // x - 4;
472 // }
473 #define SkASSERT_RELEASE(cond) \
474 static_cast<void>( (cond) ? (void)0 : []{ SK_ABORT("assert(%s)", #cond); }() )
475
476 #ifdef SK_DEBUG
477 #define SkASSERT(cond) SkASSERT_RELEASE(cond)
478 #define SkASSERTF(cond, fmt, ...) static_cast<void>( (cond) ? (void)0 : [&]{ \
479 SkDebugf(fmt"\n", ##__VA_ARGS__); \
480 SK_ABORT("assert(%s)", #cond); \
481 }() )
482 #define SkDEBUGFAIL(message) SK_ABORT("%s", message)
483 #define SkDEBUGFAILF(fmt, ...) SK_ABORT(fmt, ##__VA_ARGS__)
484 #define SkDEBUGCODE(...) __VA_ARGS__
485 #define SkDEBUGF(...) SkDebugf(__VA_ARGS__)
486 #define SkAssertResult(cond) SkASSERT(cond)
487 #else
488 #define SkASSERT(cond) static_cast<void>(0)
489 #define SkASSERTF(cond, fmt, ...) static_cast<void>(0)
490 #define SkDEBUGFAIL(message)
491 #define SkDEBUGFAILF(fmt, ...)
492 #define SkDEBUGCODE(...)
493 #define SkDEBUGF(...)
494 #ifdef SK_BUILD_FOR_OHOS
495 #define SkDebugf(...)
496 #endif
497
498 // unlike SkASSERT, this macro executes its condition in the non-debug build.
499 // The if is present so that this can be used with functions marked SK_WARN_UNUSED_RESULT.
500 #define SkAssertResult(cond) if (cond) {} do {} while(false)
501 #endif
502
503 ////////////////////////////////////////////////////////////////////////////////
504
505 /** Fast type for unsigned 8 bits. Use for parameter passing and local
506 variables, not for storage
507 */
508 typedef unsigned U8CPU;
509
510 /** Fast type for unsigned 16 bits. Use for parameter passing and local
511 variables, not for storage
512 */
513 typedef unsigned U16CPU;
514
515 /** @return false or true based on the condition
516 */
SkToBool(const T & x)517 template <typename T> static constexpr bool SkToBool(const T& x) {
518 return 0 != x; // NOLINT(modernize-use-nullptr)
519 }
520
521 static constexpr int16_t SK_MaxS16 = INT16_MAX;
522 static constexpr int16_t SK_MinS16 = -SK_MaxS16;
523
524 static constexpr int32_t SK_MaxS32 = INT32_MAX;
525 static constexpr int32_t SK_MinS32 = -SK_MaxS32;
526 static constexpr int32_t SK_NaN32 = INT32_MIN;
527
528 static constexpr int64_t SK_MaxS64 = INT64_MAX;
529 static constexpr int64_t SK_MinS64 = -SK_MaxS64;
530
SkLeftShift(int32_t value,int32_t shift)531 static inline constexpr int32_t SkLeftShift(int32_t value, int32_t shift) {
532 return (int32_t) ((uint32_t) value << shift);
533 }
534
SkLeftShift(int64_t value,int32_t shift)535 static inline constexpr int64_t SkLeftShift(int64_t value, int32_t shift) {
536 return (int64_t) ((uint64_t) value << shift);
537 }
538
539 ////////////////////////////////////////////////////////////////////////////////
540
541 /** @return the number of entries in an array (not a pointer)
542 */
543 template <typename T, size_t N> char (&SkArrayCountHelper(T (&array)[N]))[N];
544 #define SK_ARRAY_COUNT(array) (sizeof(SkArrayCountHelper(array)))
545
546 ////////////////////////////////////////////////////////////////////////////////
547
SkAlign2(T x)548 template <typename T> static constexpr T SkAlign2(T x) { return (x + 1) >> 1 << 1; }
SkAlign4(T x)549 template <typename T> static constexpr T SkAlign4(T x) { return (x + 3) >> 2 << 2; }
SkAlign8(T x)550 template <typename T> static constexpr T SkAlign8(T x) { return (x + 7) >> 3 << 3; }
551
SkIsAlign2(T x)552 template <typename T> static constexpr bool SkIsAlign2(T x) { return 0 == (x & 1); }
SkIsAlign4(T x)553 template <typename T> static constexpr bool SkIsAlign4(T x) { return 0 == (x & 3); }
SkIsAlign8(T x)554 template <typename T> static constexpr bool SkIsAlign8(T x) { return 0 == (x & 7); }
555
SkAlignPtr(T x)556 template <typename T> static constexpr T SkAlignPtr(T x) {
557 return sizeof(void*) == 8 ? SkAlign8(x) : SkAlign4(x);
558 }
SkIsAlignPtr(T x)559 template <typename T> static constexpr bool SkIsAlignPtr(T x) {
560 return sizeof(void*) == 8 ? SkIsAlign8(x) : SkIsAlign4(x);
561 }
562
563 /**
564 * align up to a power of 2
565 */
SkAlignTo(size_t x,size_t alignment)566 static inline constexpr size_t SkAlignTo(size_t x, size_t alignment) {
567 // The same as alignment && SkIsPow2(value), w/o a dependency cycle.
568 SkASSERT(alignment && (alignment & (alignment - 1)) == 0);
569 return (x + alignment - 1) & ~(alignment - 1);
570 }
571
572 typedef uint32_t SkFourByteTag;
SkSetFourByteTag(char a,char b,char c,char d)573 static inline constexpr SkFourByteTag SkSetFourByteTag(char a, char b, char c, char d) {
574 return (((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | (uint32_t)d);
575 }
576
577 ////////////////////////////////////////////////////////////////////////////////
578
579 /** 32 bit integer to hold a unicode value
580 */
581 typedef int32_t SkUnichar;
582
583 /** 16 bit unsigned integer to hold a glyph index
584 */
585 typedef uint16_t SkGlyphID;
586
587 /** 32 bit value to hold a millisecond duration
588 Note that SK_MSecMax is about 25 days.
589 */
590 typedef uint32_t SkMSec;
591
592 /** Maximum representable milliseconds; 24d 20h 31m 23.647s.
593 */
594 static constexpr SkMSec SK_MSecMax = INT32_MAX;
595
596 /** The generation IDs in Skia reserve 0 has an invalid marker.
597 */
598 static constexpr uint32_t SK_InvalidGenID = 0;
599
600 /** The unique IDs in Skia reserve 0 has an invalid marker.
601 */
602 static constexpr uint32_t SK_InvalidUniqueID = 0;
603
SkAbs32(int32_t value)604 static inline int32_t SkAbs32(int32_t value) {
605 SkASSERT(value != SK_NaN32); // The most negative int32_t can't be negated.
606 if (value < 0) {
607 value = -value;
608 }
609 return value;
610 }
611
SkTAbs(T value)612 template <typename T> static inline T SkTAbs(T value) {
613 if (value < 0) {
614 value = -value;
615 }
616 return value;
617 }
618
619 ////////////////////////////////////////////////////////////////////////////////
620
621 /** Indicates whether an allocation should count against a cache budget.
622 */
623 enum class SkBudgeted : bool {
624 kNo = false,
625 kYes = true
626 };
627
628 /** Indicates whether a backing store needs to be an exact match or can be
629 larger than is strictly necessary
630 */
631 enum class SkBackingFit {
632 kApprox,
633 kExact
634 };
635
636 #endif
637