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skia2/include/core/SkPreConfig.h
Leon Scroggins III c41a5f58b2 Generate Android Framework host-side Skia (linux) 
Bug: b/118742766

Update gn_to_bp to write an Android.bp file that will build a host-side
Skia library.

Switch some methods from SK_BUILD_FOR_ANDROID to
SK_BUILD_FOR_ANDROID_FRAMEWORK.

Prior reviews were done at ag/5482397.

gn_to_bp.py:
- Run GN twice - once for android and once for linux
- Disable GPU (depends on a to-be-written host side GL target) and HEIF
  (which relies on Android hardware) on linux
  - TODO: Turn on GPU on linux
- Split sources into everywhere, android-only, and linux-only.
  It seems that Android.bp does not allow using the same cpp
  file in multiple targets.
  - note that we currently *only* divide out the sources. The cflags are
    the same (except for a couple manual ones) and include
    directories are mostly the same (again, except for manual ones).
    Android has a "gpu" include directory, which I don't expect to
    make a difference to the linux build, which isn't using GPU (yet).
- Use the same "custom empty" font manager on the host as on Android
- Write separate SkUserConfig files; one for android and one for linux.
  This allows libskia to force libraries that use it to use the right
  defines by setting export_include_dirs.
- Add extra checks to SkUserConfig.h to ensure we have only the
  appropriate SK_BUILD_FOR macro defined
- Add host_supported: true for libskia

gn_to_bp_utils.py:
- Switch SkUserConfig.h from include guards to pragma once so it is
  easier to append to the end. This matches how Android generally
  includes headers.

BUILD.gn:
- Add skia_use_fixed_gamma_text so host build can use the same SK_GAMMA
  defines as the device.

SkPreConfig.h:
- Stop making SK_BUILD_FOR_ANDROID_FRAMEWORK imply SK_BUILD_FOR_ANDROID.
  The host build needs the former defined but not the latter.

SkRegion.cpp/.h:
- Make toString() SK_BUILD_FOR_ANDROID_FRAMEWORK so it can be called on
  the host.

SkCamera.h/.cpp:
- Switch methods to SK_BUILD_FOR_ANDROID_FRAMEWORK so they can be called
  on the host.
- Make getCameraLocation*() const. They are logically const, and this
  allows removing a const_cast + TODO in hwui.

Change-Id: I771f825d06380e01c0488fd1c00df1d8a2454dc0
Reviewed-on: https://skia-review.googlesource.com/c/171231
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
2018-11-19 17:51:32 +00:00

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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 SkPreConfig_DEFINED
#define SkPreConfig_DEFINED
// Allows embedders that want to disable macros that take arguments to just
// define that symbol to be one of these
#define SK_NOTHING_ARG1(arg1)
#define SK_NOTHING_ARG2(arg1, arg2)
#define SK_NOTHING_ARG3(arg1, arg2, arg3)
//////////////////////////////////////////////////////////////////////
#if !defined(SK_BUILD_FOR_ANDROID) && !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_WIN) && \
!defined(SK_BUILD_FOR_UNIX) && !defined(SK_BUILD_FOR_MAC)
#ifdef __APPLE__
#include "TargetConditionals.h"
#endif
#if defined(_WIN32) || defined(__SYMBIAN32__)
#define SK_BUILD_FOR_WIN
#elif defined(ANDROID) || defined(__ANDROID__)
#define SK_BUILD_FOR_ANDROID
#elif defined(linux) || defined(__linux) || defined(__FreeBSD__) || \
defined(__OpenBSD__) || defined(__sun) || defined(__NetBSD__) || \
defined(__DragonFly__) || defined(__Fuchsia__) || \
defined(__GLIBC__) || defined(__GNU__) || defined(__unix__)
#define SK_BUILD_FOR_UNIX
#elif TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
#define SK_BUILD_FOR_IOS
#else
#define SK_BUILD_FOR_MAC
#endif
#endif
//////////////////////////////////////////////////////////////////////
#ifdef SK_BUILD_FOR_WIN
#if !defined(SK_RESTRICT)
#define SK_RESTRICT __restrict
#endif
#if !defined(SK_WARN_UNUSED_RESULT)
#define SK_WARN_UNUSED_RESULT
#endif
#endif
#if !defined(SK_RESTRICT)
#define SK_RESTRICT __restrict__
#endif
#if !defined(SK_WARN_UNUSED_RESULT)
#define SK_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
#endif
//////////////////////////////////////////////////////////////////////
#if !defined(SK_CPU_BENDIAN) && !defined(SK_CPU_LENDIAN)
#if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#define SK_CPU_BENDIAN
#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
#define SK_CPU_LENDIAN
#elif defined(__sparc) || defined(__sparc__) || \
defined(_POWER) || defined(__powerpc__) || \
defined(__ppc__) || defined(__hppa) || \
defined(__PPC__) || defined(__PPC64__) || \
defined(_MIPSEB) || defined(__ARMEB__) || \
defined(__s390__) || \
(defined(__sh__) && defined(__BIG_ENDIAN__)) || \
(defined(__ia64) && defined(__BIG_ENDIAN__))
#define SK_CPU_BENDIAN
#else
#define SK_CPU_LENDIAN
#endif
#endif
//////////////////////////////////////////////////////////////////////
#if defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)
#define SK_CPU_X86 1
#endif
/**
* SK_CPU_SSE_LEVEL
*
* If defined, SK_CPU_SSE_LEVEL should be set to the highest supported level.
* On non-intel CPU this should be undefined.
*/
#define SK_CPU_SSE_LEVEL_SSE1 10
#define SK_CPU_SSE_LEVEL_SSE2 20
#define SK_CPU_SSE_LEVEL_SSE3 30
#define SK_CPU_SSE_LEVEL_SSSE3 31
#define SK_CPU_SSE_LEVEL_SSE41 41
#define SK_CPU_SSE_LEVEL_SSE42 42
#define SK_CPU_SSE_LEVEL_AVX 51
#define SK_CPU_SSE_LEVEL_AVX2 52
#define SK_CPU_SSE_LEVEL_AVX512 60
// When targetting iOS and using gyp to generate the build files, it is not
// possible to select files to build depending on the architecture (i.e. it
// is not possible to use hand optimized assembly implementation). In that
// configuration SK_BUILD_NO_OPTS is defined. Remove optimisation then.
#ifdef SK_BUILD_NO_OPTS
#define SK_CPU_SSE_LEVEL 0
#endif
// Are we in GCC/Clang?
#ifndef SK_CPU_SSE_LEVEL
// These checks must be done in descending order to ensure we set the highest
// available SSE level.
#if defined(__AVX512F__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX512
#elif defined(__AVX2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2
#elif defined(__AVX__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX
#elif defined(__SSE4_2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE42
#elif defined(__SSE4_1__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE41
#elif defined(__SSSE3__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSSE3
#elif defined(__SSE3__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE3
#elif defined(__SSE2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
#endif
#endif
// Are we in VisualStudio?
#ifndef SK_CPU_SSE_LEVEL
// These checks must be done in descending order to ensure we set the highest
// available SSE level. 64-bit intel guarantees at least SSE2 support.
#if defined(__AVX2__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX2
#elif defined(__AVX__)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_AVX
#elif defined(_M_X64) || defined(_M_AMD64)
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
#elif defined(_M_IX86_FP)
#if _M_IX86_FP >= 2
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
#elif _M_IX86_FP == 1
#define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE1
#endif
#endif
#endif
//////////////////////////////////////////////////////////////////////
// ARM defines
#if defined(__arm__) && (!defined(__APPLE__) || !TARGET_IPHONE_SIMULATOR)
#define SK_CPU_ARM32
#elif defined(__aarch64__) && !defined(SK_BUILD_NO_OPTS)
#define SK_CPU_ARM64
#endif
// All 64-bit ARM chips have NEON. Many 32-bit ARM chips do too.
#if !defined(SK_ARM_HAS_NEON) && !defined(SK_BUILD_NO_OPTS) && defined(__ARM_NEON)
#define SK_ARM_HAS_NEON
#endif
// Really this __APPLE__ check shouldn't be necessary, but it seems that Apple's Clang defines
// __ARM_FEATURE_CRC32 for -arch arm64, even though their chips don't support those instructions!
#if defined(__ARM_FEATURE_CRC32) && !defined(__APPLE__)
#define SK_ARM_HAS_CRC32
#endif
//////////////////////////////////////////////////////////////////////
#if !defined(SKIA_IMPLEMENTATION)
#define SKIA_IMPLEMENTATION 0
#endif
#if !defined(SK_API)
#if defined(SKIA_DLL)
#if defined(_MSC_VER)
#if SKIA_IMPLEMENTATION
#define SK_API __declspec(dllexport)
#else
#define SK_API __declspec(dllimport)
#endif
#else
#define SK_API __attribute__((visibility("default")))
#endif
#else
#define SK_API
#endif
#endif
#endif
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