bdb34d0345
The Chrome opts targets (sse2, ssse3, sse41, etc) don't have include/private on their include path. This should unblock the roll. TBR=reed@google.com BUG=skia:4117 Review URL: https://codereview.chromium.org/1268853007
134 lines
4.5 KiB
C++
134 lines
4.5 KiB
C++
/*
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* Copyright 2006 The Android Open Source Project
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkUtils_DEFINED
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#define SkUtils_DEFINED
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#include "SkTypes.h"
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namespace SkOpts {
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extern void (*memset16)(uint16_t[], uint16_t, int);
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extern void (*memset32)(uint32_t[], uint32_t, int);
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}
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///////////////////////////////////////////////////////////////////////////////
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// The inlining heuristics below were determined using bench/MemsetBench.cpp
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// on a x86 desktop, a Nexus 7 with and without NEON, and a Nexus 9:
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// - on x86, inlining was never faster,
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// - on ARMv7, inlining was faster for N<=10. Putting this check inside the NEON
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// code was not helpful; it's got to be here outside.
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// - NEON code generation for ARMv8 with GCC 4.9 is terrible,
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// making the NEON code ~8x slower that just a serial loop.
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/** Similar to memset(), but it assigns a 16bit value into the buffer.
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@param buffer The memory to have value copied into it
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@param value The 16bit value to be copied into buffer
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@param count The number of times value should be copied into the buffer.
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*/
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static inline void sk_memset16(uint16_t buffer[], uint16_t value, int count) {
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#if defined(SK_CPU_ARM64)
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while (count --> 0) { *buffer++ = value; } return;
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#elif defined(SK_CPU_ARM32)
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if (count <= 10) { while (count --> 0) { *buffer++ = value; } return; }
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#endif
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SkOpts::memset16(buffer, value, count);
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}
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/** Similar to memset(), but it assigns a 32bit value into the buffer.
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@param buffer The memory to have value copied into it
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@param value The 32bit value to be copied into buffer
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@param count The number of times value should be copied into the buffer.
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*/
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static inline void sk_memset32(uint32_t buffer[], uint32_t value, int count) {
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#if defined(SK_CPU_ARM64)
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while (count --> 0) { *buffer++ = value; } return;
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#elif defined(SK_CPU_ARM32)
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if (count <= 10) { while (count --> 0) { *buffer++ = value; } return; }
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#endif
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SkOpts::memset32(buffer, value, count);
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}
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///////////////////////////////////////////////////////////////////////////////
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#define kMaxBytesInUTF8Sequence 4
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#ifdef SK_DEBUG
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int SkUTF8_LeadByteToCount(unsigned c);
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#else
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#define SkUTF8_LeadByteToCount(c) ((((0xE5 << 24) >> ((unsigned)c >> 4 << 1)) & 3) + 1)
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#endif
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inline int SkUTF8_CountUTF8Bytes(const char utf8[]) {
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SkASSERT(utf8);
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return SkUTF8_LeadByteToCount(*(const uint8_t*)utf8);
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}
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int SkUTF8_CountUnichars(const char utf8[]);
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int SkUTF8_CountUnichars(const char utf8[], size_t byteLength);
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SkUnichar SkUTF8_ToUnichar(const char utf8[]);
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SkUnichar SkUTF8_NextUnichar(const char**);
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SkUnichar SkUTF8_PrevUnichar(const char**);
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/** Return the number of bytes need to convert a unichar
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into a utf8 sequence. Will be 1..kMaxBytesInUTF8Sequence,
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or 0 if uni is illegal.
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*/
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size_t SkUTF8_FromUnichar(SkUnichar uni, char utf8[] = NULL);
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///////////////////////////////////////////////////////////////////////////////
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#define SkUTF16_IsHighSurrogate(c) (((c) & 0xFC00) == 0xD800)
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#define SkUTF16_IsLowSurrogate(c) (((c) & 0xFC00) == 0xDC00)
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int SkUTF16_CountUnichars(const uint16_t utf16[]);
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int SkUTF16_CountUnichars(const uint16_t utf16[], int numberOf16BitValues);
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// returns the current unichar and then moves past it (*p++)
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SkUnichar SkUTF16_NextUnichar(const uint16_t**);
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// this guy backs up to the previus unichar value, and returns it (*--p)
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SkUnichar SkUTF16_PrevUnichar(const uint16_t**);
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size_t SkUTF16_FromUnichar(SkUnichar uni, uint16_t utf16[] = NULL);
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size_t SkUTF16_ToUTF8(const uint16_t utf16[], int numberOf16BitValues,
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char utf8[] = NULL);
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inline bool SkUnichar_IsVariationSelector(SkUnichar uni) {
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/* The 'true' ranges are:
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* 0x180B <= uni <= 0x180D
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* 0xFE00 <= uni <= 0xFE0F
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* 0xE0100 <= uni <= 0xE01EF
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*/
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if (uni < 0x180B || uni > 0xE01EF) {
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return false;
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}
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if ((uni > 0x180D && uni < 0xFE00) || (uni > 0xFE0F && uni < 0xE0100)) {
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return false;
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}
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return true;
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}
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///////////////////////////////////////////////////////////////////////////////
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class SkAutoTrace {
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public:
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/** NOTE: label contents are not copied, just the ptr is
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retained, so DON'T DELETE IT.
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*/
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SkAutoTrace(const char label[]) : fLabel(label) {
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SkDebugf("--- trace: %s Enter\n", fLabel);
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}
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~SkAutoTrace() {
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SkDebugf("--- trace: %s Leave\n", fLabel);
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}
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private:
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const char* fLabel;
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};
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#define SkAutoTrace(...) SK_REQUIRE_LOCAL_VAR(SkAutoTrace)
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#endif
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