SWF FILE FORMAT SPECIFICATION
V
ERSION 19
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Contents
Introduction ............................................................................................................................................................. 12
Chapter 1: Basic Data Types .................................................................................................................................... 14
Coordinates and twips ......................................................................................................................................... 14
Integer types and byte order ............................................................................................................................... 14
Fixed-point numbers ........................................................................................................................................... 15
Floating-point numbers ....................................................................................................................................... 16
Encoded integers ................................................................................................................................................. 16
Bit values ............................................................................................................................................................. 17
Using bit values .................................................................................................................................................... 18
String values ........................................................................................................................................................ 19
Language code ..................................................................................................................................................... 20
RGB color record ................................................................................................................................................. 21
RGBA color with alpha record ............................................................................................................................. 21
ARGB color with alpha record ............................................................................................................................. 21
Rectangle record ................................................................................................................................................. 22
MATRIX record..................................................................................................................................................... 22
Color transform record ........................................................................................................................................ 24
Color transform with alpha record ...................................................................................................................... 25
Chapter 2: SWF Structure Summary
................................................................................................................. 27
The SWF header .................................................................................................................................................. 27
SWF file structure ................................................................................................................................................ 28
Tag format ........................................................................................................................................................... 29
Definition and control tags .................................................................................................................................. 29
Tag ordering in SWF files ..................................................................................................................................... 30
The dictionary ...................................................................................................................................................... 30
Processing a SWF file ........................................................................................................................................... 32
File compression strategy .................................................................................................................................... 32
Summary .............................................................................................................................................................. 32
Chapter 3: The Display List ...................................................................................................................................... 33
Clipping layers ..................................................................................................................................................... 33
Using the display list ............................................................................................................................................ 33
Display list tags .................................................................................................................................................... 34
PlaceObject ...................................................................................................................................................... 34
PlaceObject2 .................................................................................................................................................... 35
PlaceObject3 .................................................................................................................................................... 38
Color Matrix filter ............................................................................................................................................ 42
Convolution filter ............................................................................................................................................. 42
Blur filter .......................................................................................................................................................... 44
Drop Shadow filter........................................................................................................................................... 45
Glow filter ........................................................................................................................................................ 46
Bevel filter ....................................................................................................................................................... 46
Gradient Glow and Gradient Bevel filters ....................................................................................................... 47
ClipEventFlags .................................................................................................................................................. 48
RemoveObject ................................................................................................................................................. 50
RemoveObject2 ............................................................................................................................................... 50
ShowFrame ...................................................................................................................................................... 51
Chapter 4: Control Tags ........................................................................................................................................... 52
SetBackgroundColor ............................................................................................................................................ 52
FrameLabel .......................................................................................................................................................... 52
Protect ................................................................................................................................................................. 53
End ....................................................................................................................................................................... 53
ExportAssets ........................................................................................................................................................ 53
ImportAssets ........................................................................................................................................................ 54
EnableDebugger .................................................................................................................................................. 55
EnableDebugger2 ................................................................................................................................................ 55
ScriptLimits .......................................................................................................................................................... 56
SetTabIndex ......................................................................................................................................................... 56
FileAttributes ....................................................................................................................................................... 57
ImportAssets2...................................................................................................................................................... 58
SymbolClass ......................................................................................................................................................... 59
Metadata ............................................................................................................................................................. 59
DefineScalingGrid ................................................................................................................................................ 60
DefineSceneAndFrameLabelData ........................................................................................................................ 62
Chapter 5: Actions ................................................................................................................................................... 63
SWF 3 action model ............................................................................................................................................. 63
SWF 3 actions .................................................................................................................................................. 64
SWF 4 action model ............................................................................................................................................. 67
The program counter ....................................................................................................................................... 68
SWF 4 actions .................................................................................................................................................. 68
SWF 5 action model ............................................................................................................................................. 89
SWF 5 actions .................................................................................................................................................. 89
ScriptObject actions ......................................................................................................................................... 90
Type actions ................................................................................................................................................... 100
Math actions .................................................................................................................................................. 102
