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comparison: gfx/skia/trunk/include/core/SkUtils.h
gfx/skia/trunk/include/core/SkUtils.h
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- TOR_BUG_3246
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- 129ffea94266
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| -1:000000000000 | 0:3fa4eb7f3002 |
|---|---|
| 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 SkUtils_DEFINED | |
| 9 #define SkUtils_DEFINED | |
| 10 | |
| 11 #include "SkTypes.h" | |
| 12 | |
| 13 /////////////////////////////////////////////////////////////////////////////// | |
| 14 | |
| 15 /** Similar to memset(), but it assigns a 16bit value into the buffer. | |
| 16 @param buffer The memory to have value copied into it | |
| 17 @param value The 16bit value to be copied into buffer | |
| 18 @param count The number of times value should be copied into the buffer. | |
| 19 */ | |
| 20 void sk_memset16_portable(uint16_t dst[], uint16_t value, int count); | |
| 21 typedef void (*SkMemset16Proc)(uint16_t dst[], uint16_t value, int count); | |
| 22 SkMemset16Proc SkMemset16GetPlatformProc(); | |
| 23 | |
| 24 /** Similar to memset(), but it assigns a 32bit value into the buffer. | |
| 25 @param buffer The memory to have value copied into it | |
| 26 @param value The 32bit value to be copied into buffer | |
| 27 @param count The number of times value should be copied into the buffer. | |
| 28 */ | |
| 29 void sk_memset32_portable(uint32_t dst[], uint32_t value, int count); | |
| 30 typedef void (*SkMemset32Proc)(uint32_t dst[], uint32_t value, int count); | |
| 31 SkMemset32Proc SkMemset32GetPlatformProc(); | |
| 32 | |
| 33 #ifndef sk_memset16 | |
| 34 extern SkMemset16Proc sk_memset16; | |
| 35 #endif | |
| 36 | |
| 37 #ifndef sk_memset32 | |
| 38 extern SkMemset32Proc sk_memset32; | |
| 39 #endif | |
| 40 | |
| 41 /////////////////////////////////////////////////////////////////////////////// | |
| 42 | |
| 43 #define kMaxBytesInUTF8Sequence 4 | |
| 44 | |
| 45 #ifdef SK_DEBUG | |
| 46 int SkUTF8_LeadByteToCount(unsigned c); | |
| 47 #else | |
| 48 #define SkUTF8_LeadByteToCount(c) ((((0xE5 << 24) >> ((unsigned)c >> 4 << 1)) & 3) + 1) | |
| 49 #endif | |
| 50 | |
| 51 inline int SkUTF8_CountUTF8Bytes(const char utf8[]) { | |
| 52 SkASSERT(utf8); | |
| 53 return SkUTF8_LeadByteToCount(*(const uint8_t*)utf8); | |
| 54 } | |
| 55 | |
| 56 int SkUTF8_CountUnichars(const char utf8[]); | |
| 57 int SkUTF8_CountUnichars(const char utf8[], size_t byteLength); | |
| 58 SkUnichar SkUTF8_ToUnichar(const char utf8[]); | |
| 59 SkUnichar SkUTF8_NextUnichar(const char**); | |
| 60 SkUnichar SkUTF8_PrevUnichar(const char**); | |
| 61 | |
| 62 /** Return the number of bytes need to convert a unichar | |
| 63 into a utf8 sequence. Will be 1..kMaxBytesInUTF8Sequence, | |
| 64 or 0 if uni is illegal. | |
| 65 */ | |
| 66 size_t SkUTF8_FromUnichar(SkUnichar uni, char utf8[] = NULL); | |
| 67 | |
| 68 /////////////////////////////////////////////////////////////////////////////// | |
| 69 | |
| 70 #define SkUTF16_IsHighSurrogate(c) (((c) & 0xFC00) == 0xD800) | |
| 71 #define SkUTF16_IsLowSurrogate(c) (((c) & 0xFC00) == 0xDC00) | |
| 72 | |
| 73 int SkUTF16_CountUnichars(const uint16_t utf16[]); | |
| 74 int SkUTF16_CountUnichars(const uint16_t utf16[], int numberOf16BitValues); | |
| 75 // returns the current unichar and then moves past it (*p++) | |
| 76 SkUnichar SkUTF16_NextUnichar(const uint16_t**); | |
| 77 // this guy backs up to the previus unichar value, and returns it (*--p) | |
| 78 SkUnichar SkUTF16_PrevUnichar(const uint16_t**); | |
| 79 size_t SkUTF16_FromUnichar(SkUnichar uni, uint16_t utf16[] = NULL); | |
| 80 | |
| 81 size_t SkUTF16_ToUTF8(const uint16_t utf16[], int numberOf16BitValues, | |
| 82 char utf8[] = NULL); | |
| 83 | |
| 84 inline bool SkUnichar_IsVariationSelector(SkUnichar uni) { | |
| 85 /* The 'true' ranges are: | |
| 86 * 0x180B <= uni <= 0x180D | |
| 87 * 0xFE00 <= uni <= 0xFE0F | |
| 88 * 0xE0100 <= uni <= 0xE01EF | |
| 89 */ | |
| 90 if (uni < 0x180B || uni > 0xE01EF) { | |
| 91 return false; | |
| 92 } | |
| 93 if ((uni > 0x180D && uni < 0xFE00) || (uni > 0xFE0F && uni < 0xE0100)) { | |
| 94 return false; | |
| 95 } | |
| 96 return true; | |
| 97 } | |
| 98 | |
| 99 /////////////////////////////////////////////////////////////////////////////// | |
| 100 | |
| 101 class SkAutoTrace { | |
| 102 public: | |
| 103 /** NOTE: label contents are not copied, just the ptr is | |
| 104 retained, so DON'T DELETE IT. | |
| 105 */ | |
| 106 SkAutoTrace(const char label[]) : fLabel(label) { | |
| 107 SkDebugf("--- trace: %s Enter\n", fLabel); | |
| 108 } | |
| 109 ~SkAutoTrace() { | |
| 110 SkDebugf("--- trace: %s Leave\n", fLabel); | |
| 111 } | |
| 112 private: | |
| 113 const char* fLabel; | |
| 114 }; | |
| 115 #define SkAutoTrace(...) SK_REQUIRE_LOCAL_VAR(SkAutoTrace) | |
| 116 | |
| 117 #endif |
