Update wuffs to match the version used by Skia
Change-Id: I4c98412464785f1175af68d6d7ae9f8b1038ace2
diff --git a/BUILD.gn b/BUILD.gn
new file mode 100644
index 0000000..93a76eb
--- /dev/null
+++ b/BUILD.gn
@@ -0,0 +1,61 @@
+# Copyright 2013 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+config("wuffs_public") {
+ include_dirs = [ "release/c" ]
+
+ cflags = []
+
+ if (is_clang) {
+ cflags += [
+ "-Wno-unused-function",
+ "-Wno-c++11-narrowing",
+ ]
+ }
+}
+
+source_set("wuffs") {
+ public_configs = [ ":wuffs_public" ]
+
+ defines = [
+ # Copy/pasting from "../externals/wuffs/release/c/wuffs-*.c":
+ #
+ # ----
+ #
+ # Wuffs ships as a "single file C library" or "header file library" as per
+ # https://github.com/nothings/stb/blob/master/docs/stb_howto.txt
+ #
+ # To use that single file as a "foo.c"-like implementation, instead of a
+ # "foo.h"-like header, #define WUFFS_IMPLEMENTATION before #include'ing or
+ # compiling it.
+ #
+ # ----
+ "WUFFS_IMPLEMENTATION",
+
+ # Continuing to copy/paste:
+ #
+ # ----
+ #
+ # Defining the WUFFS_CONFIG__MODULE* macros are optional, but it lets users
+ # of Wuffs' .c file whitelist which parts of Wuffs to build. That file
+ # contains the entire Wuffs standard library, implementing a variety of
+ # codecs and file formats. Without this macro definition, an optimizing
+ # compiler or linker may very well discard Wuffs code for unused codecs,
+ # but listing the Wuffs modules we use makes that process explicit.
+ # Preprocessing means that such code simply isn't compiled.
+ #
+ # ----
+ #
+ # For Skia, we're only interested in particular image codes (e.g. GIF) and
+ # their dependencies (e.g. BASE, LZW).
+ "WUFFS_CONFIG__MODULES",
+ "WUFFS_CONFIG__MODULE__BASE",
+ "WUFFS_CONFIG__MODULE__GIF",
+ "WUFFS_CONFIG__MODULE__LZW",
+ ]
+
+ sources = [
+ "release/c/wuffs-v0.2.c",
+ ]
+}
