Name 

Description 

 

laUtils_ArrangeRectangle 

Calculates the position of a rectangle within the given bounds and in accordance with the given parameters. A use case for this is when an image and a text rectangle must be arranged in a button box. This version of the algorithm will calculate the location of the image rectangle. 

 

laUtils_ArrangeRectangleRelative 

Calculates the position of a rectangle within the given bounds and in accordance with the given parameters. A use case for this is when an image and a text rectangle must be arranged in a button box. This version of the algorithm will calculate the location of the text rectangle. 

 

laUtils_ChildIntersectsParent 

Performs an intersection test between a parent widget and a child widget 

 

laUtils_ClipRectToParent 

Clips a widget to the all the parents of a widget 

 

laUtils_GetLayer 

Finds the root parent of a widget, which should be a layer 

 

laUtils_GetNextHighestWidget 

Gets the next highest Z order widget in the tree from 'wgt' 

 

laUtils_ListOcclusionCullTest 

Performs an occlusion test on a list of widgets an a rectangular area. This attempts to find only the topmost widgets for the given area. If a widget is completely occluded then it is removed from the list. Any widgets that remain in the list should be redrawn by the rasterizer. 

 

laUtils_OcclusionCullTest 

Performs an occlusion test for a widget in the tree. A widget is occluded if it is completely covered by one or more widgets. This is useful for culling widgets before the rasterizing phase. 

 

laUtils_Pick 

Finds the top-most visible widget in the tree at the given coordinates. 

 

laUtils_PickFromLayer 

Finds the top-most visible widget in a layer at the given coordinates. 

 

laUtils_PickRect 

Finds all of the visible widgets in the given rectangular area. 

 

laUtils_PointScreenToLocalSpace 

Converts a point from layer space into the local space of a widget 

 

laUtils_PointToLayerSpace 

Converts a point from widget space into layer space 

 

laUtils_PreprocessImage 

Preprocesses an image to a specified memory address. 

 

laUtils_RectFromLayerSpace 

Converts a rectangle from layer space to widget local space 

 

laUtils_RectFromParentSpace 

Converts a rectangle from widget parent space to widget local space 

 

laUtils_RectToLayerSpace 

Converts a rectangle from widget local space to layer space 

 

laUtils_RectToParentSpace 

Converts a rectangle from widget local space to widget parent space. Widget must be a child of a layer for this to function. 

 

laUtils_RectToScreenSpace 

Converts a rectangle from widget local space to screen space 

 

laUtils_ScreenToMirroredSpace 

Takes a point in screen space and returns a transformed version in mirrored space. 

 

laUtils_ScreenToOrientedSpace 

Takes a point in screen space and returns a transformed version in oriented space. 

 

laUtils_WidgetIsOccluded 

Returns LA_TRUE if the specified widget is occluded in the specified rectangle area. 

 

laUtils_WidgetLayerRect 

Returns the bounding rectangle of a widget in layer space 

 

laUtils_WidgetLocalRect 

Returns the bounding rectangle of a widget in local space 

 

Name 

Description 

 

GFX_Point 

A two dimensional Cartesian point. 

 

GFX_Rect 

A rectangle definition. 

 

laLayer 

Primary definition of a layer. Builds on base functions of a standard widget. Should never have a direct parent. 

 

laList 

Linked list definition