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      1 # Copyright 2012 The Android Open Source Project
      2 #
      3 # Use of this source code is governed by a BSD-style license that can be
      4 # found in the LICENSE file.
      5 
      6 {
      7   # Get ready for the ugly...
      8   #
      9   # - We have to nest our variables dictionaries multiple levels deep, so that
     10   #   this and other gyp files can rely on previously-set variable values in
     11   #   their 'variables': { 'conditions': [] } clauses.
     12   #
     13   #   Example 1:
     14   #   Within this file, we use the value of variable 'skia_os' to set the
     15   #   value of variable 'os_posix', so 'skia_os' must be defined within a
     16   #   "more inner" (enclosed) scope than 'os_posix'.
     17   #
     18   #   Example 2:
     19   #   http://src.chromium.org/viewvc/chrome/trunk/src/third_party/libjpeg/libjpeg.gyp?revision=102306 ,
     20   #   which we currently import into our build, uses the value of 'os_posix'
     21   #   within the 'conditions' list in its 'variables' dict.
     22   #   In order for that to work, it needs the value of 'os_posix' to have been
     23   #   set within a "more inner" (enclosed) scope than its own 'variables' dict.
     24   #
     25   # - On the other hand, key/value pairs of a given 'variable' dict are only
     26   #   inherited by:
     27   #   1. directly enclosing 'variable' dicts, and
     28   #   2. "sibling" 'variable' dicts (which, I guess, are combined into a single
     29   #      'variable' dict during gyp processing)
     30   #   and NOT inherited by "uncles" (siblings of directly enclosing 'variable'
     31   #   dicts), so we have to re-define every variable at every enclosure level
     32   #   within our ridiculous matryoshka doll of 'variable' dicts.  That's why
     33   #   we have variable definitions like this:  'skia_os%': '<(skia_os)',
     34   #
     35   # See http://src.chromium.org/viewvc/chrome/trunk/src/build/common.gypi?revision=127004 ,
     36   # which deals with these same constraints in a similar manner.
     37   #
     38   'variables': {  # level 1
     39     'variables': {  # level 2
     40 
     41       # Variables needed by conditions list within the level-2 variables dict.
     42       'variables': {  # level 3
     43         # We use 'skia_os' instead of 'OS' throughout our gyp files, to allow
     44         # for cross-compilation (e.g. building for either MacOS or iOS on Mac).
     45         # We set it automatically based on 'OS' (the host OS), but allow the
     46         # user to override it via GYP_DEFINES if they like.
     47         'skia_os%': '<(OS)',
     48 
     49         'skia_android_framework%': 0,
     50         'skia_arch_type%': 'x86',
     51         'arm_version%': 0,
     52         'arm_neon%': 0,
     53       },
     54 
     55       # Re-define all variables defined within the level-3 'variables' dict,
     56       # so that siblings of the level-2 'variables' dict can see them.
     57       # (skia_os will depend on skia_android_framework.)
     58       'skia_android_framework%': '<(skia_android_framework)',
     59       'skia_arch_type%': '<(skia_arch_type)',
     60       'arm_version%': '<(arm_version)',
     61       'arm_neon%': '<(arm_neon)',
     62 
     63       'conditions': [
     64         [ 'skia_android_framework == 1', {
     65           'skia_os%': 'android',
     66           'skia_chrome_utils%': 0,
     67           'skia_use_system_json%': 1,
     68         }, {
     69           'skia_os%': '<(skia_os)',
     70           'skia_chrome_utils%': 1,
     71           'skia_use_system_json%': 0,
     72         }],
     73         [ 'skia_os == "win"', {
     74           'os_posix%': 0,
     75         }, {
     76           'os_posix%': 1,
     77         }],
     78         [ 'skia_os in ["linux"]', {
     79           'skia_poppler_enabled%': 1,
     80         }, {
     81           'skia_poppler_enabled%': 0,
     82         }],
     83         [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "mac"] or skia_arch_type == "arm64"', {
     84           'skia_arch_width%': 64,
     85         }, {
     86           'skia_arch_width%': 32,
     87         }],
     88         [ 'skia_os == "android"', {
     89           'skia_static_initializers%': 0,
     90         }, {
     91           'skia_static_initializers%': 1,
     92         }],
     93         [ 'skia_os == "ios"', {
     94           'skia_arch_type%': 'arm',
     95           'arm_version%': 7,
     96           'arm_neon%': 0, # neon asm files known not to work with the ios build
     97         }],
     98         [ 'skia_os in ["android", "nacl"] and not skia_android_framework',
     99           # skia_freetype_static - on OS variants that normally would
    100           #     dynamically link the system FreeType library, don't do
    101           #     that; instead statically link to the version in
    102           #     third_party/freetype and third_party/externals/freetype.
    103           {
    104             'skia_freetype_static%': '1',
    105           }, {
    106             'skia_freetype_static%': '0',
    107           }
    108         ],
    109       ],
    110 
    111       # skia_giflib_static - on OS variants that normally would link giflib
    112       #     with '-lgif' and include the headers from '/usr/include/gif_lib.h',
    113       #     don't do that; instead compile and staticlly link the version of
    114       #     giflib in third_party/externals/giflib.
    115       'skia_giflib_static%': '0',
    116 
    117       # skia_libpng_static - on OS variants that normally would link libpng
    118       #     with '-lpng' and include the headers from '/usr/include/png.h',
    119       #     don't do that; instead compile and staticlly link the version of
    120       #     libpng in third_party/externals/libpng.
    121       'skia_libpng_static%': '0',
    122 
    123       # skia_zlib_static - on OS variants that normally would link zlib with
    124       #     '-lz' or libz.dylib and include the headers from '<zlib.h>',
    125       #     don't do that; instead compile and staticlly link the version of
    126       #     zlib in third_party/externals/zlib.
    127       'skia_zlib_static%': '0',
    128 
    129       # skia_no_fontconfig - On POSIX systems that would normally use the
    130       #     SkFontHost_fontconfig interface; use the SkFontHost_linux
    131       #     version instead.
    132       'skia_no_fontconfig%': '0',
    133 
    134       'skia_sanitizer%': '',
    135       'skia_scalar%': 'float',
    136       'skia_mesa%': 0,
    137       'skia_stroke_path_rendering%': 0,
    138       'skia_android_path_rendering%': 0,
    139       'skia_resource_cache_mb_limit%': 0,
    140       'skia_resource_cache_count_limit%': 0,
    141       'skia_angle%': 0,
    142       'skia_directwrite%': 0,
    143       'skia_gpu%': 1,
    144       'skia_osx_deployment_target%': '',
    145       'skia_profile_enabled%': 0,
    146       'skia_win_debuggers_path%': '',
    147       'skia_shared_lib%': 0,
    148       'skia_opencl%': 0,
    149       'skia_force_distancefield_fonts%': 0,
    150 
    151       # These variables determine the default optimization level for different
    152       # compilers.
    153       'skia_default_vs_optimization_level': 3, # full (/Ox)
    154       'skia_default_gcc_optimization_level': 3, # -O3
    155     },
    156 
    157     'conditions': [
    158       [ 'skia_os == "win" and skia_arch_width == 32 or '
    159         'skia_os in ["linux", "freebsd", "openbsd", "solaris", "android"] '
    160             'and skia_android_framework == 0 or '
    161         'skia_os == "mac" and skia_arch_width == 32', {
    162         'skia_warnings_as_errors%': 1,
    163       }, {
    164         'skia_warnings_as_errors%': 0,
    165       }],
    166 
    167       # This variable allows the user to customize the optimization level used
    168       # by the compiler.  The user should be aware that this has different
    169       # meanings for different compilers and should exercise caution when
    170       # overriding it.
    171       [ 'skia_os == "win"', {
    172         'skia_release_optimization_level%': '<(skia_default_vs_optimization_level)',
    173       }, {
    174         'skia_release_optimization_level%': '<(skia_default_gcc_optimization_level)',
    175       }],
    176       [ 'skia_sanitizer', {
    177         'skia_clang_build': 1,
    178         'skia_keep_frame_pointer': 1,
    179       }, {
    180         'skia_clang_build%': 0,
    181         'skia_keep_frame_pointer%': 0,
    182       }],
    183     ],
    184 
    185     # Re-define all variables defined within the level-2 'variables' dict,
    186     # so that siblings of the level-1 'variables' dict can see them.
    187     'arm_version%': '<(arm_version)',
    188     'arm_neon%': '<(arm_neon)',
    189     'arm_neon_optional%': 0,
    190     'mips_arch_variant%': 'mips32',
    191     'mips_dsp%': 0,
    192     'skia_os%': '<(skia_os)',
    193     'os_posix%': '<(os_posix)',
    194 
    195     'skia_freetype_static%': '<(skia_freetype_static)',
    196     'skia_giflib_static%': '<(skia_giflib_static)',
    197     'skia_libpng_static%': '<(skia_libpng_static)',
    198     'skia_zlib_static%': '<(skia_zlib_static)',
    199     'skia_no_fontconfig%': '<(skia_no_fontconfig)',
    200     'skia_sanitizer%': '<(skia_sanitizer)',
    201     'skia_scalar%': '<(skia_scalar)',
    202     'skia_mesa%': '<(skia_mesa)',
    203     'skia_stroke_path_rendering%': '<(skia_stroke_path_rendering)',
    204     'skia_android_framework%': '<(skia_android_framework)',
    205     'skia_use_system_json%': '<(skia_use_system_json)',
    206     'skia_android_path_rendering%': '<(skia_android_path_rendering)',
    207     'skia_resource_cache_mb_limit%': '<(skia_resource_cache_mb_limit)',
    208     'skia_resource_cache_count_limit%': '<(skia_resource_cache_count_limit)',
    209     'skia_angle%': '<(skia_angle)',
    210     'skia_poppler_enabled%': '<(skia_poppler_enabled)',
    211     'skia_arch_width%': '<(skia_arch_width)',
    212     'skia_arch_type%': '<(skia_arch_type)',
    213     'skia_chrome_utils%': '<(skia_chrome_utils)',
    214     'skia_directwrite%': '<(skia_directwrite)',
    215     'skia_gpu%': '<(skia_gpu)',
    216     'skia_win_exceptions%': 0,
    217     'skia_osx_deployment_target%': '<(skia_osx_deployment_target)',
    218     'skia_profile_enabled%': '<(skia_profile_enabled)',
    219     'skia_shared_lib%': '<(skia_shared_lib)',
    220     'skia_opencl%': '<(skia_opencl)',
    221     'skia_force_distancefield_fonts%': '<(skia_force_distancefield_fonts)',
    222     'skia_static_initializers%': '<(skia_static_initializers)',
    223     'ios_sdk_version%': '6.0',
    224     'skia_win_debuggers_path%': '<(skia_win_debuggers_path)',
    225     'skia_run_pdfviewer_in_gm%': 0,
    226     'skia_disable_inlining%': 0,
    227     'skia_moz2d%': 0,
    228 
    229     # These are referenced by our .gypi files that list files (e.g. core.gypi)
    230     #
    231     'skia_src_path%': '../src',
    232     'skia_include_path%': '../include',
    233   },
    234 }
    235