Add SkCodec, including PNG implementation.

gyp/codec.gyp

Index: gyp/codec.gyp
diff --git a/gyp/codec.gyp b/gyp/codec.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..f538e63531300752f4263a16e88bf823ee5797a7
--- /dev/null
+++ b/gyp/codec.gyp
@@ -0,0 +1,50 @@
+# GYP file for codec project.
+{
+  'targets': [
+    {
+      'target_name': 'codec',
+      'product_name': 'skia_codec',
+      'type': 'static_library',
+      'standalone_static_library': 1,
+      'dependencies': [
+        'core.gyp:*',
+        'libjpeg.gyp:*',
+        'etc1.gyp:libetc1',
+        'ktx.gyp:libSkKTX',
+        'libwebp.gyp:libwebp',
+        'utils.gyp:utils',
+      ],
+      'include_dirs': [
+        '../include/codec',
+        '../src/codec',
+      ],
+      'sources': [
+        '../src/codec/SkCodec.cpp',
+        '../src/codec/SkCodec_libpng.cpp',
+        '../src/codec/SkSwizzler.cpp',
+      ],
+      'conditions': [
+        [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "android", "mac", "ios"]', {

[djsollen, 2015/02/25 20:52:15]

I think you can remove this condition and the one below it and just make it a
constant dependency.

[scroggo, 2015/02/25 21:33:52]

Done. This explains my Windows trybot failure, I think...

+          'dependencies': [
+            'libpng.gyp:libpng',

[djsollen, 2015/02/25 20:52:15]

this gyp file still uses the android_deps.gyp internally unless you set the
skia_libpng_static variable.  Not sure if you can set it here and have it be
picked up by the dependency or not.

[scroggo, 2015/02/25 21:33:52]

I set it in common_variables.

+          ],
+        }],
+        [ 'skia_os == "chromeos"', {
+          'dependencies': [
+             'libpng.gyp:libpng',
+          ],
+        }],
+        [ 'skia_os == "ios"', {
+           'include_dirs': [
+             '../include/utils/mac',

[djsollen, 2015/02/25 20:52:15]

is this needed?

[scroggo, 2015/02/25 21:33:52]

No. Removed.

+           ],
+        }],
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '../include/codec',
+        ],
+      },
+    },
+  ],
+}