TextRenderingProcess

Text Rendering in OpenOffice.org consists of these steps:

The application layers

• decide which font to use and which font attributes to apply
• measure text in this font
• determine where to put this text item
• requests the graphic layer to display the text item

The platform independent part of the graphics system layer

• converts the application layer's font request into a device specific font request
• converts the application coordinates to device coordinates
• requests the service of a typographic layout engine to layout the text item
• adjusts the layouted text item to the requested needs of the application
• draws the typographically layouted text item to the system device
• adds text decorations like underlines, emphasis marks, etc.

The platform dependent part of the graphics system layer

• extracts system specific details of the typography related information and abstracts them for the system independent layer
• provides the services of the system's typographic layout engine to the system independent layer
• extends the services of the system's typographic layout engine to the minimum requirements of the system independent layer
• provides the services of system specific font subsetting/embedding
• draws the typographic layout on the target device