sma_swim.txt

sharp的arm920t 7A400的评估板附带光盘Sharp KEVLH7A400 v0.3b Welcome to the SHARP KEV7A400 Evaluation board

Library  : SMA_SWIM

Date     : 06/05/2002

Purpose  : Simple graphics drawing library with support for simple windows with frames, lines,
           boxes, images w/ scaling, multiple fonts.

Notes    : Library is portable to all frame buffer type devices. Display interface and memory
           must be configured externally to this library. 256 and 64Kcolors are only supported
           in this library.
           ONLY 16-bit output formats are supported to the physical LCD display. For 256 color
           images, where the frame buffer is stored as a series of pixels in 8-bit mode, the
           output to the LCD display is assumed to be converted to 16-bits through the palette
           table in the LCD controller. For 15- and 16-bit color modes, the data is raw to the
           LCD display. (It may be possible to use a raw 8-bit data mode without palette
           output.)

Issues   : Fonts are not clipped - be sure to provide a window size big enough for at least
           one character of a font size (vertically and horizontally), or the character will
           overflow out of the window. Some error checking is not performed in the code, as
           to keep the renderer fast - be careful with virtual/physical locations. Presently,
           image scrolling is very inefficient, but can be improved by using 32-bit moves
           instead of 8 or 16-bit moves.

Supporting packages:
           swim_fonts    - collection of files that contain font data and structures
                           Requires font data files and font header structure
           swim_image    - Image placement functions