Using Animated GIFs in Authorware

Import an animated GIF into Authorware by choosing Insert > Media > Animated GIF. Authorware supports the GIF89a format. GIFs must have a global color table to be imported. You can import an animated GIF within an Authorware file or link to an external file. An animated GIF can play at its original frame rate, or at a different rate that you specify.

You can make an animated GIF play direct-to-screen, meaning that it is immediately displayed on the Presentation window instead of being first composed in an off-screen buffer with other sprites. A direct-to-screen GIF take less time to load, but you cannot place other sprites in front of it or use a display mode other than Opaque.

To set properties for an animated GIF:

1 Select an animated GIF icon on the flowline and choose Modify > Icon > Properties.
2 Use the Icon Title field to view or edit the icon name.
3 To set specific animated GIF settings, click Options...
4 To change the file of a linked external media file, enter a new pathname in the Import field or click Browse to choose a new file. Click Internet to enter a new URL for a file to be imported from the Internet.
5 To achieve the fastest playback rate, turn on Direct to Screen.
When Direct to Screen is on, you can only use Opaque mode and you cannot place any sprites on top of the animated GIF sprite. Displaying multiple direct-to-screen GIFs in the Presentation window may reduce playback performance.
6 Choose an option from the Tempo pop-up menu.
Normal Plays at the GIF's original rate.
Fixed Plays at the frame rate you enter on the right.
Lock-Step Plays every frame at the rate specified as the global rate for your piece.

 

Scripting Reference

You can pause, resume and rewind an Animated GIF or set its properties by scripting. When you add a new Animated GIF icon to the flowline, the sprite takes the current property values stored with the sprite icon. When you change the icon's properties, its sprite is affected even when it isn't currently playing in the Presentation window. Changing a sprite's properties with SetSpriteProperty will affect the sprite only if it appears in the Presentation window.

The Animated GIF Xtra provides the following new properties and functions to control Animated GIF icons and sprites.

 

directToStage

  Syntax

SetIconProperty(IconID@"IconTitle", #directToStage, state)

GetIconProperty(IconID@"IconTitle", #directToStage )

  Type Icon property

  Description  This property affects how an Animated GIF is displayed in the Presentation window. The state parameter can have these values:

TRUE The Animated GIF plays in front of all other layers. No objects can appear in front of the animation.

FALSE The Animated GIF can appear in any layer in the Presentation window.

The directToStage property can be tested and set.

  Example  This script sets the setting of the directToStage property of an Animated GIF named "GIF89" to TRUE: 

SetIconProperty(@"GIF89", #directToStage,TRUE)


fixedRate

  Syntax SetIconProperty(IconID@"IconTitle", #fixedRate, rate)

GetIconProperty(IconID@"IconTitle", #fixedRate)

  Type Icon property

  Description  This property determines the frame rate for the specified animated GIF. The animated GIF's tempo should be set to fixed using either the Animated GIF Icon Properties dialog box or the playbackMode property.

  Example  The following example sets the animated GIF icon named "GIF89" to play back at 25 frames per second: 

SetIconProperty(@"GIF89", #playbackMode, #fixed)þ-- set the playbackmode to fixed
SetIconProperty(@"GIF89", #fixedRate, 25)


linked

  Syntax SetIconProperty(IconID@"IconTitle", #linked, state)

GetIconProperty(IconID@"IconTitle", #linked)

  Type Icon property

  Description  This property determines if the media in the animated GIF icon is embedded into Authorware or linked to an external file. The state parameter can be:

TRUE The animated GIF is linked to an external file.
FALSE The animated GIF is embedded into the Authorware file.
  Example 

This example sets the animated GIF icon's media to be a linked external file:

SetIconProperty( @"GIF89", #linked, TRUE )


internalPathName

  Syntax SetIconProperty(IconID@"IconTitle", #internalpathname, file)

GetIconProperty(IconID@"IconTitle", #internalpathname)

  Type Icon property

  Description  This property specifies the linked Animated GIF file to display at the specified icon title. The file parameter can be an absolute path, a relative path, or a URL.

The internalpathname property can be tested and set.

  Example  The following examples show three ways to specify the internalpathname property:
SetIconProperty(@"GIF89", #internalpathname, "sample.gif")
SetIconProperty(@"GIF89", #internalpathname, "C:\\sample.gif")
SetIconProperty(@"GIF89", #internalpathname, ¬
"http://www.animatedGIF.com/test/sample.gif")


pause

  Syntax CallSprite(IconID@"IconTitle", #pause)

  Type Xtra function

  Description  This function freezes the animation for the specified animated GIF.

  Example  This script pauses the animation in the sprite icon named "GIF89." 

CallSprite(@"GIF89", #pause)


playbackMode

  Syntax

SetIconProperty(IconID@"IconTitle", #playbackmode, mode)

GetIconProperty(IconID@"IconTitle", #playbackmode)

  Type Icon property

  Description  This property specifies the tempo setting for the animated GIF at the specified icon title. The playbackmode property can be tested and set.

The mode parameter can be:

#normal Plays at the animated GIF's original rate.
#fixed Plays at the frame rate set using either the Animated GIF Xtra Icon Properties dialog box or the fixedRate property.
#lockstep Plays the animated GIF at the global rate for the Authorware piece.
  Example  The following example shows thow to set the playbackmode property:
SetIconProperty(@"GIF89", #playbackmode,#normal)


resume

  Syntax CallSprite(IconID@"IconTitle", #resume)

  Type Xtra function

  Description  This function plays the animation for the specified animated GIF. Use this function to play animations that are paused using the pause function.

  Example  This script plays the animation in the sprite icon named "GIF89."
CallSprite(@"GIF89", #resume)


rewind

  Syntax CallSprite(IconID@"IconTitle", #rewind)

  Type Xtra function

  Description  This function resets the specified animated GIF to the first frame.

  Example  This script rewinds the animation in the sprite icon named "GIF89." 

CallSprite(@"GIF89", #rewind)