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skia2/gn/gn_to_bp.py
Ben Wagner 51d83abcd2 Ease HarfBuzz API change with feature detection 
Skia has been using the not entirely public HarfBuzz subsetting API.
This API is changing for public release. In order to make the transition
from old to new build flags were added, which would require build
changes as HarfBuzz is updated downstream. Instead detect the existence
of the old or new API and use whichever is present automatically.

Change-Id: I0727f97ad7d394dfb24553076d4b383570cf0002
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/437121
Reviewed-by: Garret Rieger <grieger@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2021-08-06 17:22:22 +00:00

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#!/usr/bin/env python
#
# Copyright 2016 Google Inc.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Generate Android.bp for Skia from GN configuration.
from __future__ import print_function
import os
import pprint
import string
import subprocess
import tempfile
import gn_to_bp_utils
# First we start off with a template for Android.bp,
# with holes for source lists and include directories.
bp = string.Template('''// This file is autogenerated by gn_to_bp.py.
// To make changes to this file, follow the instructions on skia.org for
// downloading Skia and submitting changes. Modify gn_to_bp.py (or the build
// files it uses) and submit. The autoroller will then create the updated
// Android.bp. Or ask a Skia engineer for help.
package {
default_applicable_licenses: ["external_skia_license"],
}
// Added automatically by a large-scale-change that took the approach of
// 'apply every license found to every target'. While this makes sure we respect
// every license restriction, it may not be entirely correct.
//
// e.g. GPL in an MIT project might only apply to the contrib/ directory.
//
// Please consider splitting the single license below into multiple licenses,
// taking care not to lose any license_kind information, and overriding the
// default license using the 'licenses: [...]' property on targets as needed.
//
// For unused files, consider creating a 'fileGroup' with "//visibility:private"
// to attach the license to, and including a comment whether the files may be
// used in the current project.
//
// large-scale-change included anything that looked like it might be a license
// text as a license_text. e.g. LICENSE, NOTICE, COPYING etc.
//
// Please consider removing redundant or irrelevant files from 'license_text:'.
//
// large-scale-change filtered out the below license kinds as false-positives:
// SPDX-license-identifier-CC-BY-NC
// SPDX-license-identifier-GPL-2.0
// SPDX-license-identifier-LGPL-2.1
// SPDX-license-identifier-OFL:by_exception_only
// See: http://go/android-license-faq
license {
name: "external_skia_license",
visibility: [":__subpackages__"],
license_kinds: [
"SPDX-license-identifier-Apache-2.0",
"SPDX-license-identifier-BSD",
"SPDX-license-identifier-CC0-1.0",
"SPDX-license-identifier-FTL",
"SPDX-license-identifier-MIT",
"SPDX-license-identifier-MPL",
"legacy_unencumbered",
],
license_text: [
"LICENSE",
"NOTICE",
],
}
cc_defaults {
name: "skia_defaults",
cflags: [
$cflags
],
cppflags:[
$cflags_cc
],
export_include_dirs: [
$export_includes
],
local_include_dirs: [
$local_includes
],
arch: {
arm: {
srcs: [
$arm_srcs
],
neon: {
srcs: [
$arm_neon_srcs
],
},
},
arm64: {
srcs: [
$arm64_srcs
],
},
x86: {
srcs: [
$x86_srcs
],
},
x86_64: {
srcs: [
$x86_srcs
],
},
},
target: {
android: {
srcs: [
"third_party/vulkanmemoryallocator/GrVulkanMemoryAllocator.cpp",
],
local_include_dirs: [
"third_party/vulkanmemoryallocator/",
],
},
},
}
cc_library_static {
// Smaller version of Skia, without e.g. codecs, intended for use by RenderEngine.
name: "libskia_renderengine",
defaults: ["skia_defaults",
"skia_renderengine_deps"],
srcs: [
$renderengine_srcs
],
local_include_dirs: [
"renderengine",
],
export_include_dirs: [
"renderengine",
],
}
cc_library_static {
name: "libskia",
host_supported: true,
cppflags:[
// Exceptions are necessary for SkRawCodec.
// FIXME: Should we split SkRawCodec into a separate target so the rest
// of Skia need not be compiled with exceptions?
"-fexceptions",
],
srcs: [
$srcs
],
target: {
android: {
srcs: [
$android_srcs
],
local_include_dirs: [
"android",
],
export_include_dirs: [
"android",
],
},
linux_glibc: {
cflags: [
"-mssse3",
],
srcs: [
$linux_srcs
],
local_include_dirs: [
"linux",
],
export_include_dirs: [
"linux",
],
},
darwin: {
cflags: [
"-mssse3",
],
srcs: [
$mac_srcs
],
local_include_dirs: [
"mac",
],
export_include_dirs: [
"mac",
],
},
windows: {
enabled: true,
cflags: [
"-mssse3",
"-Wno-unknown-pragmas",
],
srcs: [
$win_srcs
],
local_include_dirs: [
"win",
],
export_include_dirs: [
"win",
],
},
},
defaults: ["skia_deps",
"skia_pgo",
"skia_defaults",
],
}
// Build libskia with PGO by default.
// Location of PGO profile data is defined in build/soong/cc/pgo.go
// and is separate from skia.
// To turn it off, set ANDROID_PGO_NO_PROFILE_USE environment variable
// or set enable_profile_use property to false.
cc_defaults {
name: "skia_pgo",
pgo: {
instrumentation: true,
profile_file: "hwui/hwui.profdata",
benchmarks: ["hwui", "skia"],
enable_profile_use: true,
},
}
// "defaults" property to disable profile use for Skia tools and benchmarks.
cc_defaults {
name: "skia_pgo_no_profile_use",
defaults: [
"skia_pgo",
],
pgo: {
enable_profile_use: false,
},
}
cc_defaults {
// Subset of the larger "skia_deps", which includes only the dependencies
// needed for libskia_renderengine. Note that it includes libpng and libz
// for the purposes of MSKP captures, but we could instead leave it up to
// RenderEngine to provide its own SkSerializerProcs if another client
// wants an even smaller version of libskia.
name: "skia_renderengine_deps",
shared_libs: [
"libcutils",
"liblog",
"libpng",
"libz",
],
static_libs: [
"libarect",
],
group_static_libs: true,
target: {
android: {
shared_libs: [
"libEGL",
"libGLESv2",
"libvulkan",
"libnativewindow",
],
export_shared_lib_headers: [
"libvulkan",
],
},
},
}
cc_defaults {
name: "skia_deps",
defaults: ["skia_renderengine_deps"],
shared_libs: [
"libdng_sdk",
"libjpeg",
"libpiex",
"libexpat",
"libft2",
],
static_libs: [
"libwebp-decode",
"libwebp-encode",
"libsfntly",
],
target: {
android: {
shared_libs: [
"libheif",
],
},
darwin: {
host_ldlibs: [
"-framework AppKit",
],
},
windows: {
host_ldlibs: [
"-lgdi32",
"-loleaut32",
"-lole32",
"-lopengl32",
"-luuid",
"-lwindowscodecs",
],
},
},
}
cc_defaults {
name: "skia_tool_deps",
defaults: [
"skia_deps",
"skia_pgo_no_profile_use"
],
shared_libs: [
"libicu",
"libharfbuzz_ng",
],
static_libs: [
"libskia",
],
cflags: [
"-DSK_SHAPER_HARFBUZZ_AVAILABLE",
"-DSK_UNICODE_AVAILABLE",
"-Wno-implicit-fallthrough",
"-Wno-unused-parameter",
"-Wno-unused-variable",
],
target: {
windows: {
enabled: true,
},
},
}
cc_test {
name: "skia_dm",
defaults: [
"skia_tool_deps"
],
local_include_dirs: [
$dm_includes
],
srcs: [
$dm_srcs
],
shared_libs: [
"libbinder",
"libutils",
],
}
cc_test {
name: "skia_nanobench",
defaults: [
"skia_tool_deps"
],
local_include_dirs: [
$nanobench_includes
],
srcs: [
$nanobench_srcs
],
data: [
"resources/**/*",
],
}''')
# We'll run GN to get the main source lists and include directories for Skia.
def generate_args(target_os, enable_gpu, renderengine = False):
d = {
'is_official_build': 'true',
# gn_to_bp_utils' GetArchSources will take care of architecture-specific
# files.
'target_cpu': '"none"',
# Use the custom FontMgr, as the framework will handle fonts.
'skia_enable_fontmgr_custom_directory': 'false',
'skia_enable_fontmgr_custom_embedded': 'false',
'skia_enable_fontmgr_android': 'false',
'skia_enable_fontmgr_win': 'false',
'skia_enable_fontmgr_win_gdi': 'false',
'skia_use_fonthost_mac': 'false',
# enable features used in skia_nanobench
'skia_tools_require_resources': 'true',
'skia_use_fontconfig': 'false',
'skia_include_multiframe_procs': 'false',
'skia_libgifcodec_path': '"third_party/libgifcodec"',
}
d['target_os'] = target_os
if target_os == '"android"':
d['skia_enable_tools'] = 'true'
d['skia_include_multiframe_procs'] = 'true'
if enable_gpu:
d['skia_use_vulkan'] = 'true'
else:
d['skia_use_vulkan'] = 'false'
d['skia_enable_gpu'] = 'false'
if target_os == '"win"':
# The Android Windows build system does not provide FontSub.h
d['skia_use_xps'] = 'false'
# BUILDCONFIG.gn expects these to be set when building for Windows, but
# we're just creating Android.bp, so we don't need them. Populate with
# some placeholder values.
d['win_vc'] = '"placeholder_version"'
d['win_sdk_version'] = '"placeholder_version"'
d['win_toolchain_version'] = '"placeholder_version"'
if target_os == '"android"' and not renderengine:
d['skia_use_libheif'] = 'true'
else:
d['skia_use_libheif'] = 'false'
if renderengine:
d['skia_use_libpng_decode'] = 'false'
d['skia_use_libjpeg_turbo_decode'] = 'false'
d['skia_use_libjpeg_turbo_encode'] = 'false'
d['skia_use_libwebp_decode'] = 'false'
d['skia_use_libwebp_encode'] = 'false'
d['skia_use_libgifcodec'] = 'false'
d['skia_enable_pdf'] = 'false'
d['skia_use_freetype'] = 'false'
d['skia_use_fixed_gamma_text'] = 'false'
d['skia_use_expat'] = 'false'
d['skia_enable_fontmgr_custom_empty'] = 'false'
else:
d['skia_enable_android_utils'] = 'true'
d['skia_use_freetype'] = 'true'
d['skia_use_fixed_gamma_text'] = 'true'
d['skia_enable_fontmgr_custom_empty'] = 'true'
return d
gn_args = generate_args('"android"', True)
gn_args_linux = generate_args('"linux"', False)
gn_args_mac = generate_args('"mac"', False)
gn_args_win = generate_args('"win"', False)
gn_args_renderengine = generate_args('"android"', True, True)
js = gn_to_bp_utils.GenerateJSONFromGN(gn_args)
def strip_slashes(lst):
return {str(p.lstrip('/')) for p in lst}
android_srcs = strip_slashes(js['targets']['//:skia']['sources'])
cflags = strip_slashes(js['targets']['//:skia']['cflags'])
cflags_cc = strip_slashes(js['targets']['//:skia']['cflags_cc'])
local_includes = strip_slashes(js['targets']['//:skia']['include_dirs'])
export_includes = strip_slashes(js['targets']['//:public']['include_dirs'])
dm_srcs = strip_slashes(js['targets']['//:dm']['sources'])
dm_includes = strip_slashes(js['targets']['//:dm']['include_dirs'])
nanobench_target = js['targets']['//:nanobench']
nanobench_srcs = strip_slashes(nanobench_target['sources'])
nanobench_includes = strip_slashes(nanobench_target['include_dirs'])
gn_to_bp_utils.GrabDependentValues(js, '//:dm', 'sources', dm_srcs, 'skia')
gn_to_bp_utils.GrabDependentValues(js, '//:nanobench', 'sources',
nanobench_srcs, 'skia')
# skcms is a little special, kind of a second-party library.
local_includes.add("include/third_party/skcms")
dm_includes .add("include/third_party/skcms")
# Android's build will choke if we list headers.
def strip_headers(sources):
return {s for s in sources if not s.endswith('.h')}
gn_to_bp_utils.GrabDependentValues(js, '//:skia', 'sources', android_srcs, None)
android_srcs = strip_headers(android_srcs)
js_linux = gn_to_bp_utils.GenerateJSONFromGN(gn_args_linux)
linux_srcs = strip_slashes(js_linux['targets']['//:skia']['sources'])
gn_to_bp_utils.GrabDependentValues(js_linux, '//:skia', 'sources', linux_srcs,
None)
linux_srcs = strip_headers(linux_srcs)
js_mac = gn_to_bp_utils.GenerateJSONFromGN(gn_args_mac)
mac_srcs = strip_slashes(js_mac['targets']['//:skia']['sources'])
gn_to_bp_utils.GrabDependentValues(js_mac, '//:skia', 'sources', mac_srcs,
None)
mac_srcs = strip_headers(mac_srcs)
js_win = gn_to_bp_utils.GenerateJSONFromGN(gn_args_win)
win_srcs = strip_slashes(js_win['targets']['//:skia']['sources'])
gn_to_bp_utils.GrabDependentValues(js_win, '//:skia', 'sources', win_srcs,
None)
win_srcs = strip_headers(win_srcs)
srcs = android_srcs.intersection(linux_srcs).intersection(mac_srcs)
srcs = srcs.intersection(win_srcs)
android_srcs = android_srcs.difference(srcs)
linux_srcs = linux_srcs.difference(srcs)
mac_srcs = mac_srcs.difference(srcs)
win_srcs = win_srcs.difference(srcs)
js_renderengine = gn_to_bp_utils.GenerateJSONFromGN(gn_args_renderengine)
renderengine_srcs = strip_slashes(
js_renderengine['targets']['//:skia']['sources'])
gn_to_bp_utils.GrabDependentValues(js_renderengine, '//:skia', 'sources',
renderengine_srcs, None)
renderengine_srcs = strip_headers(renderengine_srcs)
dm_srcs = strip_headers(dm_srcs)
nanobench_srcs = strip_headers(nanobench_srcs)
cflags = gn_to_bp_utils.CleanupCFlags(cflags)
cflags_cc = gn_to_bp_utils.CleanupCCFlags(cflags_cc)
here = os.path.dirname(__file__)
defs = gn_to_bp_utils.GetArchSources(os.path.join(here, 'opts.gni'))
def get_defines(json):
return {str(d) for d in json['targets']['//:skia']['defines']}
android_defines = get_defines(js)
linux_defines = get_defines(js_linux)
mac_defines = get_defines(js_mac)
win_defines = get_defines(js_win)
renderengine_defines = get_defines(js_renderengine)
def mkdir_if_not_exists(path):
if not os.path.exists(path):
os.makedirs(path)
mkdir_if_not_exists('android/include/config/')
mkdir_if_not_exists('linux/include/config/')
mkdir_if_not_exists('mac/include/config/')
mkdir_if_not_exists('win/include/config/')
mkdir_if_not_exists('renderengine/include/config/')
platforms = { 'IOS', 'MAC', 'WIN', 'ANDROID', 'UNIX' }
def disallow_platforms(config, desired):
with open(config, 'a') as f:
p = sorted(platforms.difference({ desired }))
s = '#if '
for i in range(len(p)):
s = s + 'defined(SK_BUILD_FOR_%s)' % p[i]
if i < len(p) - 1:
s += ' || '
if i % 2 == 1:
s += '\\\n '
print(s, file=f)
print(' #error "Only SK_BUILD_FOR_%s should be defined!"' % desired, file=f)
print('#endif', file=f)
def append_to_file(config, s):
with open(config, 'a') as f:
print(s, file=f)
def write_android_config(config_path, defines):
gn_to_bp_utils.WriteUserConfig(config_path, defines)
append_to_file(config_path, '''
#ifndef SK_BUILD_FOR_ANDROID
#error "SK_BUILD_FOR_ANDROID must be defined!"
#endif''')
disallow_platforms(config_path, 'ANDROID')
write_android_config('android/include/config/SkUserConfig.h', android_defines)
write_android_config('renderengine/include/config/SkUserConfig.h', renderengine_defines)
def write_config(config_path, defines, platform):
gn_to_bp_utils.WriteUserConfig(config_path, defines)
append_to_file(config_path, '''
// Correct SK_BUILD_FOR flags that may have been set by
// SkTypes.h/Android.bp
#ifndef SK_BUILD_FOR_%s
#define SK_BUILD_FOR_%s
#endif
#ifdef SK_BUILD_FOR_ANDROID
#undef SK_BUILD_FOR_ANDROID
#endif''' % (platform, platform))
disallow_platforms(config_path, platform)
write_config('linux/include/config/SkUserConfig.h', linux_defines, 'UNIX')
write_config('mac/include/config/SkUserConfig.h', mac_defines, 'MAC')
write_config('win/include/config/SkUserConfig.h', win_defines, 'WIN')
# Turn a list of strings into the style bpfmt outputs.
def bpfmt(indent, lst, sort=True):
if sort:
lst = sorted(lst)
return ('\n' + ' '*indent).join('"%s",' % v for v in lst)
# OK! We have everything to fill in Android.bp...
with open('Android.bp', 'w') as Android_bp:
print(bp.substitute({
'export_includes': bpfmt(8, export_includes),
'local_includes': bpfmt(8, local_includes),
'srcs': bpfmt(8, srcs),
'cflags': bpfmt(8, cflags, False),
'cflags_cc': bpfmt(8, cflags_cc),
'arm_srcs': bpfmt(16, strip_headers(defs['armv7'])),
'arm_neon_srcs': bpfmt(20, strip_headers(defs['neon'])),
'arm64_srcs': bpfmt(16, strip_headers(defs['arm64'] +
defs['crc32'])),
'x86_srcs': bpfmt(16, strip_headers(defs['sse2'] +
defs['ssse3'] +
defs['sse41'] +
defs['sse42'] +
defs['avx' ] +
defs['hsw' ] +
defs['skx' ])),
'dm_includes' : bpfmt(8, dm_includes),
'dm_srcs' : bpfmt(8, dm_srcs),
'nanobench_includes' : bpfmt(8, nanobench_includes),
'nanobench_srcs' : bpfmt(8, nanobench_srcs),
'android_srcs': bpfmt(10, android_srcs),
'linux_srcs': bpfmt(10, linux_srcs),
'mac_srcs': bpfmt(10, mac_srcs),
'win_srcs': bpfmt(10, win_srcs),
'renderengine_srcs': bpfmt(8, renderengine_srcs),
}), file=Android_bp)
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