1# Copyright 2018 Google Inc.
2#
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6import("../third_party.gni")
7
8third_party("wuffs") {
9  public_include_dirs = [ "../externals/wuffs/release/c" ]
10
11  defines = [
12    # Copy/pasting from "../externals/wuffs/release/c/wuffs-*.c":
13    #
14    # ----
15    #
16    # Wuffs ships as a "single file C library" or "header file library" as per
17    # https://github.com/nothings/stb/blob/master/docs/stb_howto.txt
18    #
19    # To use that single file as a "foo.c"-like implementation, instead of a
20    # "foo.h"-like header, #define WUFFS_IMPLEMENTATION before #include'ing or
21    # compiling it.
22    #
23    # ----
24    "WUFFS_IMPLEMENTATION",
25
26    # Continuing to copy/paste:
27    #
28    # ----
29    #
30    # Defining the WUFFS_CONFIG__MODULE* macros are optional, but it lets users
31    # of Wuffs' .c file whitelist which parts of Wuffs to build. That file
32    # contains the entire Wuffs standard library, implementing a variety of
33    # codecs and file formats. Without this macro definition, an optimizing
34    # compiler or linker may very well discard Wuffs code for unused codecs,
35    # but listing the Wuffs modules we use makes that process explicit.
36    # Preprocessing means that such code simply isn't compiled.
37    #
38    # ----
39    #
40    # For Skia, we're only interested in particular image codes (e.g. GIF) and
41    # their dependencies (e.g. BASE, LZW).
42    "WUFFS_CONFIG__MODULES",
43    "WUFFS_CONFIG__MODULE__BASE",
44    "WUFFS_CONFIG__MODULE__GIF",
45    "WUFFS_CONFIG__MODULE__LZW",
46  ]
47
48  sources = [
49    "../externals/wuffs/release/c/wuffs-v0.2.c",
50  ]
51}
52