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skia2/include/core/SkPostConfig.h
derekf 29dda80c01 Add support for EGL on linux 
Allow setting skia_egl=1 to build skia against EGL instead of GLX on unix

Review URL: https://codereview.chromium.org/604853003
2014-10-01 10:52:52 -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.
*/
#ifndef SkPostConfig_DEFINED
#define SkPostConfig_DEFINED
#if defined(SK_BUILD_FOR_WIN32) || defined(SK_BUILD_FOR_WINCE)
# define SK_BUILD_FOR_WIN
#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 double, as that is faster given our impl uses doubles
* for intermediate calculations.
*/
#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_DOUBLE
#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
#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
#if defined(SK_ZLIB_INCLUDE) && defined(SK_SYSTEM_ZLIB)
# error "cannot define both SK_ZLIB_INCLUDE and SK_SYSTEM_ZLIB"
#elif defined(SK_ZLIB_INCLUDE) || defined(SK_SYSTEM_ZLIB)
# define SK_HAS_ZLIB
#endif
///////////////////////////////////////////////////////////////////////////////
#ifndef SkNEW
# define SkNEW(type_name) (new type_name)
# define SkNEW_ARGS(type_name, args) (new type_name args)
# define SkNEW_ARRAY(type_name, count) (new type_name[(count)])
# define SkNEW_PLACEMENT(buf, type_name) (new (buf) type_name)
# define SkNEW_PLACEMENT_ARGS(buf, type_name, args) (new (buf) type_name args)
# define SkDELETE(obj) (delete (obj))
# define SkDELETE_ARRAY(array) (delete[] (array))
#endif
#ifndef SK_CRASH
# ifdef SK_BUILD_FOR_WIN
# define SK_CRASH() __debugbreak()
# else
# if 1 // set to 0 for infinite loop, which can help connecting gdb
# define SK_CRASH() do { SkNO_RETURN_HINT(); *(int *)(uintptr_t)0xbbadbeef = 0; } while (false)
# else
# define SK_CRASH() do { SkNO_RETURN_HINT(); } while (true)
# endif
# endif
#endif
///////////////////////////////////////////////////////////////////////////////
/**
* SK_ENABLE_INST_COUNT controlls printing how many reference counted objects
* are still held on exit.
* Defaults to 1 in DEBUG and 0 in RELEASE.
*/
#ifndef SK_ENABLE_INST_COUNT
# ifdef SK_DEBUG
// Only enabled for static builds, because instance counting relies on static
// variables in functions defined in header files.
# define SK_ENABLE_INST_COUNT !defined(SKIA_DLL)
# else
# define SK_ENABLE_INST_COUNT 0
# endif
#endif
///////////////////////////////////////////////////////////////////////////////
#ifdef SK_BUILD_FOR_WIN
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
# define WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
# endif
# ifndef NOMINMAX
# define NOMINMAX
# define NOMINMAX_WAS_LOCALLY_DEFINED
# endif
#
# include <windows.h>
#
# ifdef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
# undef WIN32_IS_MEAN_WAS_LOCALLY_DEFINED
# undef WIN32_LEAN_AND_MEAN
# endif
# ifdef NOMINMAX_WAS_LOCALLY_DEFINED
# undef NOMINMAX_WAS_LOCALLY_DEFINED
# undef NOMINMAX
# endif
#
# 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
#ifndef SK_ALWAYSBREAK
# ifdef SK_DEBUG
# define SK_ALWAYSBREAK(cond) do { \
if (cond) break; \
SkNO_RETURN_HINT(); \
SkDebugf("%s:%d: failed assertion \"%s\"\n", __FILE__, __LINE__, #cond); \
SK_CRASH(); \
} while (false)
# else
# define SK_ALWAYSBREAK(cond) do { if (cond) break; SK_CRASH(); } while (false)
# endif
#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
//////////////////////////////////////////////////////////////////////
// TODO: rebaseline as needed so we can remove this flag entirely.
// - all platforms have int64_t now
// - we have slightly different fixed math results because of this check
// since we don't define this for linux/android
#if defined(SK_BUILD_FOR_WIN32) || defined(SK_BUILD_FOR_MAC)
# ifndef SkLONGLONG
# define SkLONGLONG int64_t
# endif
#endif
//////////////////////////////////////////////////////////////////////////////////////////////
#ifndef SK_BUILD_FOR_WINCE
# include <string.h>
# include <stdlib.h>
#else
# define _CMNINTRIN_DECLARE_ONLY
# include "cmnintrin.h"
#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
//////////////////////////////////////////////////////////////////////
#ifndef SK_OVERRIDE
# if defined(_MSC_VER)
# define SK_OVERRIDE override
# elif defined(__clang__)
// Using __attribute__((override)) on clang does not appear to always work.
// Clang defaults to C++03 and warns about using override. Squelch that. Intentionally no
// push/pop here so all users of SK_OVERRIDE ignore the warning too. This is like passing
// -Wno-c++11-extensions, except that GCC won't die (because it won't see this pragma).
# pragma clang diagnostic ignored "-Wc++11-extensions"
#
# if __has_feature(cxx_override_control)
# define SK_OVERRIDE override
# elif defined(__has_extension) && __has_extension(cxx_override_control)
# define SK_OVERRIDE override
# endif
# endif
# ifndef SK_OVERRIDE
# define SK_OVERRIDE
# endif
#endif
//////////////////////////////////////////////////////////////////////
#if !defined(SK_UNUSED)
# define SK_UNUSED SK_ATTRIBUTE(unused)
#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 defined(__clang__) || 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_ATOMICS_PLATFORM_H
# if defined(_MSC_VER)
# define SK_ATOMICS_PLATFORM_H "../../src/ports/SkAtomics_win.h"
# else
# define SK_ATOMICS_PLATFORM_H "../../src/ports/SkAtomics_sync.h"
# endif
#endif
#ifndef SK_MUTEX_PLATFORM_H
# if defined(SK_BUILD_FOR_WIN)
# define SK_MUTEX_PLATFORM_H "../../src/ports/SkMutex_win.h"
# else
# define SK_MUTEX_PLATFORM_H "../../src/ports/SkMutex_pthread.h"
# endif
#endif
#ifndef SK_BARRIERS_PLATFORM_H
# if SK_HAS_COMPILER_FEATURE(thread_sanitizer)
# define SK_BARRIERS_PLATFORM_H "../../src/ports/SkBarriers_tsan.h"
# elif defined(SK_CPU_ARM32) || defined(SK_CPU_ARM64)
# define SK_BARRIERS_PLATFORM_H "../../src/ports/SkBarriers_arm.h"
# else
# define SK_BARRIERS_PLATFORM_H "../../src/ports/SkBarriers_x86.h"
# endif
#endif
//////////////////////////////////////////////////////////////////////
#ifndef SK_EGL
# if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_NACL)
# define SK_EGL 1
# else
# define SK_EGL 0
# endif
#endif
//////////////////////////////////////////////////////////////////////
#if defined(SK_GAMMA_EXPONENT) && defined(SK_GAMMA_SRGB)
# error "cannot define both SK_GAMMA_EXPONENT and SK_GAMMA_SRGB"
#elif defined(SK_GAMMA_SRGB)
# define SK_GAMMA_EXPONENT (0.0f)
#elif !defined(SK_GAMMA_EXPONENT)
# define SK_GAMMA_EXPONENT (2.2f)
#endif
#endif // SkPostConfig_DEFINED
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