GetTrackDimensions
The GetTrackDimensions function allows your application to determine a track's source, or display, rectangle.
pascal void GetTrackDimensions (Track theTrack, Fixed *width,
Fixed *height);
theTrack
- Specifies the track for this operation. Your application obtains this track identifier from such Movie Toolbox functions as
NewMovieTrack and GetMovieTrack (described on page 2-136 and page 2-188, respectively).
width
- Contains a pointer to a fixed-point number. The Movie Toolbox returns the width, in pixels, of the track's rectangle. This value corresponds to the x coordinate of the lower-right corner of the track's rectangle.
height
- Contains a pointer to a fixed-point number. The Movie Toolbox returns the height, in pixels, of the track's rectangle. This value corresponds to the y coordinate of the lower-right corner of the track's rectangle.
DESCRIPTION
A track's source rectangle defines the coordinate system of the track. You specify the dimensions of the rectangle by providing the coordinates of the lower-right corner of the rectangle. The Movie Toolbox sets the upper-left corner to (0,0) in the track's coordinate system.
ERROR CODES
| invalidTrack | -2009 | This track is corrupted or invalid |
SEE ALSO
You can use the SetTrackDimensions function, which is described in the previous section, to set a track's rectangle.
