An Avm2 button appears to run a 'nested frame' during construction -
the same type of 'nested frame' performed by a goto. This will
run framescripts for all objects in the display hierarchy (including
orphans), resulting in an unusual child->parent framescript execution
order that DeathVsMonstars_decrypted.swf depends on.
This allows us to hide things like `MovieClip.isPlaying` from older
SWFs, which may define an `isPlaying` method without marking it
as an override.
This has the largest impact on public namespaces. There is no longer
just one public namespace - we now have a public namespace per API
version. Most callsites should use `Avm2.find_public_namespace()`,
which determines the public namespace based on the root SWF API version.
This ensures that explicit property access in Ruffle (e.g. calling
"toString") are able to see things defined in the user SWF.
This requires several changes other:
* A new `ApiVersion` enum is introduced, storing all of the api versions
defined in avmplus
* NamespaceData::Namespace now holds an `ApiVersion`. When we read a
namespace from a user-defined ABC file, we use the `ApiVersion` from
the root movie clip. This matches Flash Player's behavior - when a
child SWF is loaded through `Loader`, its API version gets overwritten
with the parent's API version, which affects definition visibility and
'override' requirements in the child SWF. Note that 'behavior changes'
in methods like `gotoAndPlay` are unaffected.
* The `PartialEq` impl for `Namespace` has been removed - each call site must now choose
to compare namespaces either by an exact version match, or by
'compatible' versions (a `<=` check) with `Namespace::matches_ns`
* `PropertyMap` now uses `Namespace::matches_ns` to check for a
compatible version when looking up a definition.
* When compiling our playerglobal, we pass in the `-apiversioning` flag,
which causes asc.jar to convert `[API]` metadata into a special
Unicode 'version mark' suffix in namespace URLs. We parse this
when loading namespaces to determine the API version to use for
playerglobal definitions (unmarked definitions use the lowest possible
version).
Unfortunately, this makes ffdec unable to decompile our
playerglobal.swc
I've going to file an upstream issue
When a UTF-16 BOM is present, ByteArray.toString automatically
strips it out, and treats the remaining data as a UTF-16 string
with the specified endianness.
* avm2: Use RawTable to implement 'public index' iteration
This makes our implementation more closely aligned with avmplus.
In particular, it's now possible to delete keys from an object
while iterating without disturbing the iteration order (as long
as those keys were already produced by the iterator).
This is based on @Bale001's work on RawTable-based iteration
A few tests had their output changed (they depend on the exact
object iteration order, and don't neccessarily match Flash Player
exactly).
* Use Cell to store index fields
* Remove outdated comment
This is our first non-rgba texture format (it uses Bc3RgbaUnorm).
ATF files store these textures in a very convoluted way - fortunately,
the 'dds2atf' tool is open-source, which allowed me to figure out
how to decode the texture back to a DXT5/DXT1 texture.
Nathan Adams