add more docs/examples from named fiddles.

ignore offscreen, srgb, and animated fiddles for now.

Change-Id: I923131b684865698e6cda138b004930e11f504d5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263713
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 315ccc3..c31e676 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -2296,7 +2296,10 @@
         "tools/fiddle/examples.h",
       ]
       if (is_win) {
-        cflags = [ "/wd4756" ]  # Overflow in constant arithmetic
+        cflags = [
+          "/wd4756",  # Overflow in constant arithmetic
+          "/wd4305",  # truncation from 'double' to 'float'
+        ]
       }
       deps = [
         ":skia",