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Adding toc reading.

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This commit is contained in:
Luigi Rosso
2020-09-15 11:34:27 -07:00
parent 151efaf8f7
commit 07f63ba8dc
1 changed files with 74 additions and 30 deletions
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104
lib/src/rive_file.dart
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@ -1,5 +1,11 @@
import 'dart:collection';
import 'dart:typed_data';
import 'package:rive/src/core/field_types/core_color_type.dart';
import 'package:rive/src/core/field_types/core_double_type.dart';
import 'package:rive/src/core/field_types/core_field_type.dart';
import 'package:rive/src/core/field_types/core_string_type.dart';
import 'package:rive/src/core/field_types/core_uint_type.dart';
import 'package:rive/src/rive_core/component.dart';
import 'package:rive/src/rive_core/runtime/runtime_header.dart';
import 'package:rive/src/rive_core/backboard.dart';
@ -19,6 +25,8 @@ class RiveFile {
Backboard _backboard;
Backboard get backboard => _backboard;
final _propertyToField = HashMap<int, CoreFieldType>();
final List<Artboard> _artboards = [];
List<Artboard> get artboards => _artboards;
@ -29,7 +37,37 @@ class RiveFile {
var reader = BinaryReader(bytes);
_header = RuntimeHeader.read(reader);
_backboard = readRuntimeObject<Backboard>(reader);
// Read property fields toc.
final indexToField = <CoreFieldType>[
RiveCoreContext.uintType,
RiveCoreContext.stringType,
RiveCoreContext.doubleType,
RiveCoreContext.colorType
];
var propertyKeys = <int>[];
for (int propertyKey = reader.readVarUint();
propertyKey != 0;
propertyKey = reader.readVarUint()) {
propertyKeys.add(propertyKey);
}
int currentInt = 0;
int currentBit = 8;
for (final propertyKey in propertyKeys) {
if (currentBit == 8) {
currentInt = reader.readUint32();
currentBit = 0;
}
int fieldIndex = (currentInt >> currentBit) & 3;
if (fieldIndex < 0 || fieldIndex >= indexToField.length) {
throw RiveFormatErrorException('unexpected field index $fieldIndex');
}
_propertyToField[propertyKey] = indexToField[fieldIndex];
currentBit += 2;
}
_backboard = _readRuntimeObject<Backboard>(reader);
if (_backboard == null) {
throw const RiveFormatErrorException(
'expected first object to be a Backboard');
@ -42,7 +80,7 @@ class RiveFile {
throw const RiveFormatErrorException(
'artboards must contain at least one object (themselves)');
}
var artboard = readRuntimeObject(reader, RuntimeArtboard());
var artboard = _readRuntimeObject(reader, RuntimeArtboard());
// Kind of weird, but the artboard is the core context at runtime, so we
// want other objects to be able to resolve it. It's always at the 0
// index.
@ -50,7 +88,7 @@ class RiveFile {
_artboards.add(artboard);
// var objects = List<Core<RiveCoreContext>>(numObjects);
for (int i = 1; i < numObjects; i++) {
Core<CoreContext> object = readRuntimeObject(reader);
Core<CoreContext> object = _readRuntimeObject(reader);
// N.B. we add objects that don't load (null) too as we need to look
// them up by index.
artboard.addObject(object);
@ -60,7 +98,7 @@ class RiveFile {
// in before the hierarchy resolves (batch add completes).
var numAnimations = reader.readVarUint();
for (int i = 0; i < numAnimations; i++) {
var animation = readRuntimeObject<Animation>(reader);
var animation = _readRuntimeObject<Animation>(reader);
if (animation == null) {
continue;
}
@ -70,7 +108,7 @@ class RiveFile {
var numKeyedObjects = reader.readVarUint();
var keyedObjects = List<KeyedObject>(numKeyedObjects);
for (int j = 0; j < numKeyedObjects; j++) {
var keyedObject = readRuntimeObject<KeyedObject>(reader);
var keyedObject = _readRuntimeObject<KeyedObject>(reader);
if (keyedObject == null) {
continue;
}
@ -81,7 +119,7 @@ class RiveFile {
var numKeyedProperties = reader.readVarUint();
for (int k = 0; k < numKeyedProperties; k++) {
var keyedProperty = readRuntimeObject<KeyedProperty>(reader);
var keyedProperty = _readRuntimeObject<KeyedProperty>(reader);
if (keyedProperty == null) {
continue;
}
@ -90,7 +128,7 @@ class RiveFile {
var numKeyframes = reader.readVarUint();
for (int l = 0; l < numKeyframes; l++) {
var keyframe = readRuntimeObject<KeyFrame>(reader);
var keyframe = _readRuntimeObject<KeyFrame>(reader);
if (keyframe == null) {
continue;
}
@ -126,32 +164,38 @@ class RiveFile {
return true;
}
}
T readRuntimeObject<T extends Core<CoreContext>>(BinaryReader reader,
[T instance]) {
int coreObjectKey = reader.readVarUint();
var object = instance ?? RiveCoreContext.makeCoreInstance(coreObjectKey);
if (object is! T) {
return null;
}
while (true) {
int propertyKey = reader.readVarUint();
if (propertyKey == 0) {
// Terminator. https://media.giphy.com/media/7TtvTUMm9mp20/giphy.gif
break;
}
var fieldType = RiveCoreContext.coreType(propertyKey);
if (fieldType == null) {
void _skipProperty(BinaryReader reader, int propertyKey) {
var field = _propertyToField[propertyKey];
if (field == null) {
throw UnsupportedError('Unsupported property key $propertyKey. '
'A new runtime is likely necessary to play this file.');
}
RiveCoreContext.setObjectProperty(
object, propertyKey, fieldType.deserialize(reader));
// Desrialize but don't do anything with the contents...
field.deserialize(reader);
}
T _readRuntimeObject<T extends Core<CoreContext>>(BinaryReader reader,
[T instance]) {
int coreObjectKey = reader.readVarUint();
var object = instance ?? RiveCoreContext.makeCoreInstance(coreObjectKey);
while (true) {
int propertyKey = reader.readVarUint();
if (propertyKey == 0) {
// Terminator. https://media.giphy.com/media/7TtvTUMm9mp20/giphy.gif
break;
}
var fieldType = RiveCoreContext.coreType(propertyKey);
if (fieldType == null || object == null) {
_skipProperty(reader, propertyKey);
} else if (object != null) {
RiveCoreContext.setObjectProperty(
object, propertyKey, fieldType.deserialize(reader));
}
}
return object as T;
}
return object as T;
}