Add gn_to_bp.py.
The general idea here is, run GN in --ide=json mode to get most information. Then, read a couple .gni files to get the rest (platform specific source lists, Android framework defines). For now, I'm generating Android.bp and SkUserConfig.h. I figure we can do DM and nanobench once these work? Change-Id: I8e7f60d6572f2d4769760cf872895518a15d841b Reviewed-on: https://skia-review.googlesource.com/5554 Reviewed-by: Leon Scroggins <scroggo@google.com> Commit-Queue: Mike Klein <mtklein@chromium.org>
This commit is contained in:
Mike Klein
Skia Commit-Bot
parent
75b5718d20
commit
308b5ac681
5
BUILD.gn
5
BUILD.gn
@ -697,6 +697,11 @@ component("skia") {
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# Targets guarded by skia_enable_tools may use //third_party freely.
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if (skia_enable_tools) {
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# Used by gn_to_bp.py to list our public include dirs.
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source_set("public") {
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configs += [ ":skia_public" ]
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}
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config("skia.h_config") {
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include_dirs = [ "$target_gen_dir" ]
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}
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183
gn/gn_to_bp.py
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183
gn/gn_to_bp.py
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@ -0,0 +1,183 @@
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#!/usr/bin/env python
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#
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# Copyright 2016 Google Inc.
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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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# Generate Android.bp for Skia from GN configuration.
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import json
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import os
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import pprint
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import string
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import subprocess
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import sys
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import tempfile
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# First we start off with a template for Android.bp,
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# with holes for source lists and include directories.
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bp = string.Template('''// This file is autogenerated by gn_to_bp.py.
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cc_library {
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name: "libskia",
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cflags: [
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"-fexceptions",
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"-Wno-unused-parameter",
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"-U_FORTIFY_SOURCE",
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"-D_FORTIFY_SOURCE=1",
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"-DSKIA_IMPLEMENTATION=1",
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],
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export_include_dirs: $export_includes,
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local_include_dirs: $local_includes,
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srcs: $srcs,
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arch: {
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arm: {
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srcs: $arm_srcs,
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armv7_a_neon: {
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srcs: $arm_neon_srcs,
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},
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},
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arm64: {
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srcs: $arm64_srcs,
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},
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mips: {
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srcs: $mips_srcs,
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},
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mips64: {
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srcs: $mips64_srcs,
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},
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x86: {
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srcs: $x86_srcs,
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},
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x86_64: {
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srcs: $x86_srcs,
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},
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}
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shared_libs: [
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"libEGL",
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"libGLESv2",
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"libdng_sdk",
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"libexpat",
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"libft2",
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"libicui18n",
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"libicuuc",
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"libjpeg",
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"liblog",
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"libpiex",
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"libpng",
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"libvulkan",
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"libz",
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],
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static_libs: [
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"cpufeatures", // TODO: use this for CRC32 detection
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"libsfntly",
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"libwebp-decode",
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"libwebp-encode",
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],
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}
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''')
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# We'll run GN to get the main source lists and include directories for Skia.
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gn_args = {
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'skia_enable_vulkan_debug_layers': 'false',
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'skia_use_vulkan': 'true',
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'target_os': '"android"',
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}
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gn_args = ' '.join(sorted('%s=%s' % (k,v) for (k,v) in gn_args.iteritems()))
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tmp = tempfile.mkdtemp()
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subprocess.check_call(['gn', 'gen', tmp, '--args=%s' % gn_args, '--ide=json'])
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js = json.load(open(os.path.join(tmp, 'project.json')))
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def strip_slashes(lst):
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return [p.lstrip('/') for p in lst]
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srcs = strip_slashes(js['targets']['//:skia']['sources'])
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local_includes = strip_slashes(js['targets']['//:skia']['include_dirs'])
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export_includes = strip_slashes(js['targets']['//:public']['include_dirs'])
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# Most defines go into SkUserConfig.h, where they're seen by Skia and its users.
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# Start with the defines :skia uses, minus a couple. We'll add more in a bit.
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defines = [str(d) for d in js['targets']['//:skia']['defines']]
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defines.remove('SKIA_IMPLEMENTATION=1') # Only libskia should have this define.
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defines.remove('XML_STATIC') # On Android, libexpat is dynamically linked.
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# For architecture specific files, it's easier to just read the same source
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# that GN does (opts.gni) rather than re-run GN once for each architecture.
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# This .gni file we want to read is close enough to Python syntax
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# that we can use execfile() if we supply definitions for GN builtins.
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# While we're at it, grab defines specific to Android Framework the same way.
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def get_path_info(path, kind):
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assert kind == "abspath"
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# While we want absolute paths in GN, relative paths work best here.
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return path
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builtins = { 'get_path_info': get_path_info }
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defs = {}
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here = os.path.dirname(sys.argv[0])
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execfile(os.path.join(here, 'opts.gni'), builtins, defs)
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execfile(os.path.join(here, 'android_framework_defines.gni'), builtins, defs)
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# This should finish off the defines.
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defines += defs['android_framework_defines']
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defines.extend([
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'GR_GL_CUSTOM_SETUP_HEADER "gl/GrGLConfig_chrome.h"',
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'SKIA_DLL',
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'SK_BUILD_FOR_ANDROID_FRAMEWORK',
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'SK_DEFAULT_FONT_CACHE_LIMIT (768 * 1024)',
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'SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE (512 * 1024)',
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'SK_IGNORE_ETC1_SUPPORT',
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'SK_USE_FREETYPE_EMBOLDEN',
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])
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defines.sort()
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# Turns paths from opts.gni into paths relative to external/skia.
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def scrub(lst):
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# Perform any string substitutions.
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for var in defs:
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if type(defs[var]) is str:
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lst = [ p.replace('$'+var, defs[var]) for p in lst ]
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# Relativize paths to top-level skia/ directory.
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return [os.path.relpath(p, '..') for p in lst]
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# Turn a list of strings into a pretty string version of a list of strings.
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def pretty(lst):
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return pprint.pformat(lst).replace("'", '"')
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# OK! We have everything to fill in Android.bp...
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with open('Android.bp', 'w') as f:
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print >>f, bp.substitute({
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'export_includes': pretty(export_includes),
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'local_includes': pretty(local_includes),
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'srcs': pretty(srcs),
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'arm_srcs': pretty(scrub(defs['armv7'])),
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'arm_neon_srcs': pretty(scrub(defs['neon'])),
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'arm64_srcs': pretty(scrub(defs['arm64'] +
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defs['crc32'])),
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'mips_srcs': pretty(scrub(defs['mips_dsp'])),
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'mips64_srcs': pretty(scrub(defs['none'])),
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'x86_srcs': pretty(scrub(defs['sse2'] +
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defs['ssse3'] +
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defs['sse41'] +
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defs['sse42'] +
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defs['avx' ] +
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defs['hsw' ]))
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})
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#... and all the #defines we want to put in SkUserConfig.h.
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with open('SkUserConfig.h', 'w') as f:
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print >>f, '// This file is autogenerated by gn_to_bp.py.'
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print >>f, '#ifndef SkUserConfig_DEFINED'
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print >>f, '#define SkUserConfig_DEFINED'
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for define in defines:
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print >>f, ' #define', define
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print >>f, '#endif//SkUserConfig_DEFINED'
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