ci8fb

README_DEMOS CONTENTS:
	Like autofill app, but renders using an 8-bit color index 
	frame buffer. See README file in application directory for 
	more information.

README CONTENTS:
	This program is an example of how a 8-bit framebuffer 
	would work.  It renders the image into an 8-bit buffer, 
	then copies/converts the buffer to a 16-bit RGBA 
	framebuffer.  The 8-bit buffer is actually located in 
	the same memory as the final 16-bit  framebuffer, so 
	no extra memory is used.  Also, any source (shading, 
	texture, primitive colors) can be used for the index 
	values, as long as the programmer is careful and designs 
	the CI TLUT to support the type of rendering chosen.

	This program prints data concerning the fill rate performance 
	for triangles of different areas and aspect ratios.  This data 
	can easily be plotted as a 3-D graph using gnuplot (see plot.gnu).

	The program works by increasing the number of triangles until 
	a frame time is exceeded and then backing off slightly.  
	At this point, the fill rate is recorded and the next 
	type of triangle is drawn.  The triangles are drawn at 
	random locations, but within the 320x240 screen so that 
	clipped triangles are not a factor.

	To define the extent of the graph, define the constants (in fill.h):
		ASPECT_HI
		ASPECT_LO
		ASPECT_STEP

		AREA_HI
		AREA_LO
		AREA_STEP
	Note that only the RDP performance is measured.  There is a 
	certain amount of DRAM bandwidth that is dedicated to loading 
	the display list into the input FIFO of the RDP.  To get the 
	most accurate answers, you should run with video blanked 
	(-b option), and don't do frame buffer clears (-c option).

DESCRIPTION:
	You should see an orange screen that is quickly covered 
	with a variety of colored triangles. The program works by 
	increasing the number of triangles until a frame time is 
	exceeded and then backing off slightly. Each pass (50 total) 
	will also be displayed on the computer monitor.  The monitor 
	will display the area, aspect, ntri per frame, time per tri 
	(usec), and fill (pix/sec)

CONTROLLER FUNCTIONS:
	n/a