[skottie] Add a tool for dumping encoded animation frames

Exports animation frames as a sequence of .png files:

  0000000.png
  0000001.png
  ...

Usage:

  skottie_tool -i <input_json> -w <out_dir>

Other options:

  --width  Frame width (default: 800)
  --height Frame height (default: 600)
  --fps    Frames per second (default: 30)
  --t0     Normalized timeline start (default: 0)
  --t1     Normalized timeline end (default: 1)

Change-Id: I4a79be0f823da15e6863909b6d67d38aa74bb740
Reviewed-on: https://skia-review.googlesource.com/132265
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/modules/skottie/BUILD.gn b/modules/skottie/BUILD.gn
index 59223de916..26b48bc59d 100644
--- a/modules/skottie/BUILD.gn
+++ b/modules/skottie/BUILD.gn
@@ -58,3 +58,21 @@ source_set("fuzz") {
     ]
   }
 }
+
+source_set("tool") {
+  testonly = true
+
+  configs += [ "../..:skia_private" ]
+  sources = [
+    "src/SkottieTool.cpp",
+  ]
+
+  deps = [
+    "../..:flags",
+    "../..:skia",
+  ]
+
+  public_deps = [
+    ":skottie",
+  ]
+}