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skia2/include/core/SkPostConfig.h
halcanary 4871f22777 SkPDF: Glyph validation change 
Instead of mapping invaid glyphIDs to zero or maxGlyphID,
don't draw them at all.

Validate glyphs when glyph is written, not ahead of time.

Don't allocate array to copy user-provided glyphs.

Easy early exit from SkPDFDevice::internalDrawText()
    GlyphPositioner::flush() called ~GlyphPositioner()
    SkScopeExit class now exists.

Assume SkTypeface* pointers are now never null in more
places.

precalculate alignmentFactor to clean up code.

SkPDFDevice::updateFont must be called with validated
glyphID.  Skip bad glyphs to make this true.

SkPDFDevice::updateFont always succeeds.

SkPDFFont::GetFontResource always succeeds (preconditions are
asserted).  If GetMetrics fails, don't call GetFontResource.

SkPDFFont::glyphsToPDFFontEncodingCount() becomes
SkPDFFont::countStretch() and is inlined.

SkPDFFont::glyphsToPDFFontEncoding now works one Glyph at a
time and is inlined.

SkPDFFont::noteGlyphUsage() operates one glyph at a time.

Add SkScopeExit.h; also a unit test for it.

SkPostConfig: Fix SK_UNUSED for Win32.

No public API changes.
TBR=reed@google.com

BUG=625995

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2278703002

Review-Url: https://codereview.chromium.org/2278703002
2016-08-26 13:17:44 -07:00

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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// IWYU pragma: private, include "SkTypes.h"
#ifndef SkPostConfig_DEFINED
#define SkPostConfig_DEFINED
#if defined(SK_BUILD_FOR_WIN32)
# define SK_BUILD_FOR_WIN
#endif
#if !defined(SK_DEBUG) && !defined(SK_RELEASE)
#ifdef NDEBUG
#define SK_RELEASE
#else
#define SK_DEBUG
#endif
#endif
#if defined(SK_DEBUG) && defined(SK_RELEASE)
# error "cannot define both SK_DEBUG and SK_RELEASE"
#elif !defined(SK_DEBUG) && !defined(SK_RELEASE)
# error "must define either SK_DEBUG or SK_RELEASE"
#endif
#if defined(SK_SUPPORT_UNITTEST) && !defined(SK_DEBUG)
# error "can't have unittests without debug"
#endif
/**
* Matrix calculations may be float or double.
* The default is float, as that's what Chromium's using.
*/
#if defined(SK_MSCALAR_IS_DOUBLE) && defined(SK_MSCALAR_IS_FLOAT)
# error "cannot define both SK_MSCALAR_IS_DOUBLE and SK_MSCALAR_IS_FLOAT"
#elif !defined(SK_MSCALAR_IS_DOUBLE) && !defined(SK_MSCALAR_IS_FLOAT)
# define SK_MSCALAR_IS_FLOAT
#endif
#if defined(SK_CPU_LENDIAN) && defined(SK_CPU_BENDIAN)
# error "cannot define both SK_CPU_LENDIAN and SK_CPU_BENDIAN"
#elif !defined(SK_CPU_LENDIAN) && !defined(SK_CPU_BENDIAN)
# error "must define either SK_CPU_LENDIAN or SK_CPU_BENDIAN"
#endif
/**
* Ensure the port has defined all of SK_X32_SHIFT, or none of them.
*/
#ifdef SK_A32_SHIFT
# if !defined(SK_R32_SHIFT) || !defined(SK_G32_SHIFT) || !defined(SK_B32_SHIFT)
# error "all or none of the 32bit SHIFT amounts must be defined"
# endif
#else
# if defined(SK_R32_SHIFT) || defined(SK_G32_SHIFT) || defined(SK_B32_SHIFT)
# error "all or none of the 32bit SHIFT amounts must be defined"
# endif
#endif
#if !defined(SK_HAS_COMPILER_FEATURE)
# if defined(__has_feature)
# define SK_HAS_COMPILER_FEATURE(x) __has_feature(x)
# else
# define SK_HAS_COMPILER_FEATURE(x) 0
# endif
#endif
#if !defined(SK_ATTRIBUTE)
# if defined(__clang__) || defined(__GNUC__)
# define SK_ATTRIBUTE(attr) __attribute__((attr))
# else
# define SK_ATTRIBUTE(attr)
# endif
#endif
// As usual, there are two ways to increase alignment... the MSVC way and the everyone-else way.
#ifndef SK_STRUCT_ALIGN
#ifdef _MSC_VER
#define SK_STRUCT_ALIGN(N) __declspec(align(N))
#else
#define SK_STRUCT_ALIGN(N) __attribute__((aligned(N)))
#endif
#endif
#if defined(_MSC_VER) && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
#define SK_VECTORCALL __vectorcall
#elif defined(SK_CPU_ARM32) && defined(SK_ARM_HAS_NEON)
#define SK_VECTORCALL __attribute__((pcs("aapcs-vfp")))
#else
#define SK_VECTORCALL
#endif
#if !defined(SK_SUPPORT_GPU)
# define SK_SUPPORT_GPU 1
#endif
/**
* The clang static analyzer likes to know that when the program is not
* expected to continue (crash, assertion failure, etc). It will notice that
* some combination of parameters lead to a function call that does not return.
* It can then make appropriate assumptions about the parameters in code
* executed only if the non-returning function was *not* called.
*/
#if !defined(SkNO_RETURN_HINT)
# if SK_HAS_COMPILER_FEATURE(attribute_analyzer_noreturn)
static inline void SkNO_RETURN_HINT() __attribute__((analyzer_noreturn));
static inline void SkNO_RETURN_HINT() {}
# else
# define SkNO_RETURN_HINT() do {} while (false)
# endif
#endif
///////////////////////////////////////////////////////////////////////////////
// TODO(mdempsky): Move elsewhere as appropriate.
#include <new>
///////////////////////////////////////////////////////////////////////////////
#ifdef SK_BUILD_FOR_WIN
# ifndef SK_A32_SHIFT
# define SK_A32_SHIFT 24
# define SK_R32_SHIFT 16
# define SK_G32_SHIFT 8
# define SK_B32_SHIFT 0
# endif
#
#endif
#if defined(GOOGLE3)
void SkDebugfForDumpStackTrace(const char* data, void* unused);
void DumpStackTrace(int skip_count, void w(const char*, void*), void* arg);
# define SK_DUMP_GOOGLE3_STACK() DumpStackTrace(0, SkDebugfForDumpStackTrace, nullptr)
#else
# define SK_DUMP_GOOGLE3_STACK()
#endif
#ifndef SK_ABORT
# define SK_ABORT(message) \
do { \
SkNO_RETURN_HINT(); \
SkDebugf("%s:%d: fatal error: \"%s\"\n", __FILE__, __LINE__, message); \
SK_DUMP_GOOGLE3_STACK(); \
sk_abort_no_print(); \
} while (false)
#endif
/**
* We check to see if the SHIFT value has already been defined.
* if not, we define it ourself to some default values. We default to OpenGL
* order (in memory: r,g,b,a)
*/
#ifndef SK_A32_SHIFT
# ifdef SK_CPU_BENDIAN
# define SK_R32_SHIFT 24
# define SK_G32_SHIFT 16
# define SK_B32_SHIFT 8
# define SK_A32_SHIFT 0
# else
# define SK_R32_SHIFT 0
# define SK_G32_SHIFT 8
# define SK_B32_SHIFT 16
# define SK_A32_SHIFT 24
# endif
#endif
/**
* SkColor has well defined shift values, but SkPMColor is configurable. This
* macro is a convenience that returns true if the shift values are equal while
* ignoring the machine's endianness.
*/
#define SK_COLOR_MATCHES_PMCOLOR_BYTE_ORDER \
(SK_A32_SHIFT == 24 && SK_R32_SHIFT == 16 && SK_G32_SHIFT == 8 && SK_B32_SHIFT == 0)
/**
* SK_PMCOLOR_BYTE_ORDER can be used to query the byte order of SkPMColor at compile time. The
* relationship between the byte order and shift values depends on machine endianness. If the shift
* order is R=0, G=8, B=16, A=24 then ((char*)&pmcolor)[0] will produce the R channel on a little
* endian machine and the A channel on a big endian machine. Thus, given those shifts values,
* SK_PMCOLOR_BYTE_ORDER(R,G,B,A) will be true on a little endian machine and
* SK_PMCOLOR_BYTE_ORDER(A,B,G,R) will be true on a big endian machine.
*/
#ifdef SK_CPU_BENDIAN
# define SK_PMCOLOR_BYTE_ORDER(C0, C1, C2, C3) \
(SK_ ## C3 ## 32_SHIFT == 0 && \
SK_ ## C2 ## 32_SHIFT == 8 && \
SK_ ## C1 ## 32_SHIFT == 16 && \
SK_ ## C0 ## 32_SHIFT == 24)
#else
# define SK_PMCOLOR_BYTE_ORDER(C0, C1, C2, C3) \
(SK_ ## C0 ## 32_SHIFT == 0 && \
SK_ ## C1 ## 32_SHIFT == 8 && \
SK_ ## C2 ## 32_SHIFT == 16 && \
SK_ ## C3 ## 32_SHIFT == 24)
#endif
//////////////////////////////////////////////////////////////////////////////////////////////
#if defined SK_DEBUG && defined SK_BUILD_FOR_WIN32
# ifdef free
# undef free
# endif
# include <crtdbg.h>
# undef free
#
# ifdef SK_DEBUGx
# if defined(SK_SIMULATE_FAILED_MALLOC) && defined(__cplusplus)
void * operator new(
size_t cb,
int nBlockUse,
const char * szFileName,
int nLine,
int foo
);
void * operator new[](
size_t cb,
int nBlockUse,
const char * szFileName,
int nLine,
int foo
);
void operator delete(
void *pUserData,
int, const char*, int, int
);
void operator delete(
void *pUserData
);
void operator delete[]( void * p );
# define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__, 0)
# else
# define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__)
# endif
# define new DEBUG_CLIENTBLOCK
# else
# define DEBUG_CLIENTBLOCK
# endif
#endif
//////////////////////////////////////////////////////////////////////
#if !defined(SK_UNUSED)
# if defined(_MSC_VER)
# define SK_UNUSED __pragma(warning(suppress:4189))
# else
# define SK_UNUSED SK_ATTRIBUTE(unused)
# endif
#endif
#if !defined(SK_ATTR_DEPRECATED)
// FIXME: we ignore msg for now...
# define SK_ATTR_DEPRECATED(msg) SK_ATTRIBUTE(deprecated)
#endif
#if !defined(SK_ATTR_EXTERNALLY_DEPRECATED)
# if !defined(SK_INTERNAL)
# define SK_ATTR_EXTERNALLY_DEPRECATED(msg) SK_ATTR_DEPRECATED(msg)
# else
# define SK_ATTR_EXTERNALLY_DEPRECATED(msg)
# endif
#endif
/**
* If your judgment is better than the compiler's (i.e. you've profiled it),
* you can use SK_ALWAYS_INLINE to force inlining. E.g.
* inline void someMethod() { ... } // may not be inlined
* SK_ALWAYS_INLINE void someMethod() { ... } // should always be inlined
*/
#if !defined(SK_ALWAYS_INLINE)
# if defined(SK_BUILD_FOR_WIN)
# define SK_ALWAYS_INLINE __forceinline
# else
# define SK_ALWAYS_INLINE SK_ATTRIBUTE(always_inline) inline
# endif
#endif
/**
* If your judgment is better than the compiler's (i.e. you've profiled it),
* you can use SK_NEVER_INLINE to prevent inlining.
*/
#if !defined(SK_NEVER_INLINE)
# if defined(SK_BUILD_FOR_WIN)
# define SK_NEVER_INLINE __declspec(noinline)
# else
# define SK_NEVER_INLINE SK_ATTRIBUTE(noinline)
# endif
#endif
//////////////////////////////////////////////////////////////////////
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1
#define SK_PREFETCH(ptr) _mm_prefetch(reinterpret_cast<const char*>(ptr), _MM_HINT_T0)
#define SK_WRITE_PREFETCH(ptr) _mm_prefetch(reinterpret_cast<const char*>(ptr), _MM_HINT_T0)
#elif defined(__GNUC__)
#define SK_PREFETCH(ptr) __builtin_prefetch(ptr)
#define SK_WRITE_PREFETCH(ptr) __builtin_prefetch(ptr, 1)
#else
#define SK_PREFETCH(ptr)
#define SK_WRITE_PREFETCH(ptr)
#endif
//////////////////////////////////////////////////////////////////////
#ifndef SK_PRINTF_LIKE
# if defined(__clang__) || defined(__GNUC__)
# define SK_PRINTF_LIKE(A, B) __attribute__((format(printf, (A), (B))))
# else
# define SK_PRINTF_LIKE(A, B)
# endif
#endif
//////////////////////////////////////////////////////////////////////
#ifndef SK_SIZE_T_SPECIFIER
# if defined(_MSC_VER)
# define SK_SIZE_T_SPECIFIER "%Iu"
# else
# define SK_SIZE_T_SPECIFIER "%zu"
# endif
#endif
//////////////////////////////////////////////////////////////////////
#ifndef SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
# define SK_ALLOW_STATIC_GLOBAL_INITIALIZERS 1
#endif
//////////////////////////////////////////////////////////////////////
#ifndef SK_EGL
# if defined(SK_BUILD_FOR_ANDROID)
# define SK_EGL 1
# else
# define SK_EGL 0
# endif
#endif
//////////////////////////////////////////////////////////////////////
#if !defined(SK_GAMMA_EXPONENT)
#define SK_GAMMA_EXPONENT (0.0f) // SRGB
#endif
//////////////////////////////////////////////////////////////////////
#ifndef GR_TEST_UTILS
# define GR_TEST_UTILS 1
#endif
//////////////////////////////////////////////////////////////////////
#if defined(SK_HISTOGRAM_ENUMERATION) && defined(SK_HISTOGRAM_BOOLEAN)
# define SK_HISTOGRAMS_ENABLED 1
#else
# define SK_HISTOGRAMS_ENABLED 0
#endif
#ifndef SK_HISTOGRAM_BOOLEAN
# define SK_HISTOGRAM_BOOLEAN(name, value)
#endif
#ifndef SK_HISTOGRAM_ENUMERATION
# define SK_HISTOGRAM_ENUMERATION(name, value, boundary_value)
#endif
#endif // SkPostConfig_DEFINED
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