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VGABitmap8BPP-Demo.spin2
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{
----------------------------------------------------------------------------------------------------
Filename: VGAbitmap8BPP-Demo.spin2
Description: Demo of the 8bpp VGA bitmap driver
Author: Jesse Burt
Started: Apr 6, 2020
Updated: Sep 6, 2024
Copyright (c) 2024 - See end of file for terms of use.
----------------------------------------------------------------------------------------------------
}
CON
_clkfreq = 180_000_000
_xtlfreq = 20_000_000
VAR
long _stack_timer[50]
long _timer_set
byte _timer_cog
OBJ
fnt: "font.5x8"
math: "math.int"
ser: "com.serial.terminal.ansi" | SER_BAUD=2_000_000
vga: "display.vga.bitmap-8bpp" | BASEPIN=24, VF=10, VB=33, HF=16, HS=96, HB=48, HV=640
' NOTE: Timings can also be changed with set_timings() (before calling driver start() )
PUB main() | time_ms
setup()
vga.clear()
demo_greet()
waitms(5_000)
vga.clear()
time_ms := 5_000
ser.pos_xy(0, 3)
demo_shadebobs(time_ms)
demo_sinewave(time_ms)
vga.clear()
demo_tri_wave(time_ms)
vga.clear()
demo_mem_scroller(time_ms, $0000, $7_FFFF)
vga.clear()
demo_bitmap(time_ms, $1_0000)
vga.clear()
demo_box(time_ms)
vga.clear()
demo_box_filled(time_ms)
vga.clear()
demo_linesweep_x(time_ms)
vga.clear()
demo_linesweep_y(time_ms)
vga.clear()
demo_line(time_ms)
vga.clear()
demo_plot(time_ms)
vga.clear()
demo_bouncing_ball(time_ms, 5)
vga.clear()
demo_circle(time_ms)
vga.clear()
demo_wander(time_ms)
vga.clear()
demo_seq_text(time_ms)
vga.clear()
demo_rnd_text(time_ms)
waitms(2000)
vga.clear()
repeat
PUB demo_bouncing_ball(testtime, radius) | iteration, bx, by, dx, dy
' Draws a simple ball bouncing off screen edges
bx := (math.rndi(XMAX) // (WIDTH - radius * 4)) + radius * 2 'Pick a random screen location to
by := (math.rndi(YMAX) // (HEIGHT - radius * 4)) + radius * 2 ' start from
dx := math.rndi(4) // 2 * 2 - 1 'Pick a random direction to
dy := math.rndi(4) // 2 * 2 - 1 ' start moving
ser.str(@"demo_bouncing_ball - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
bx += dx
by += dy
if ((by <= radius) OR (by >= YMAX - radius)) ' If we reach the top or bottom of the
dy *= -1 ' screen, change direction
if ((bx <= radius) OR (bx >= XMAX - radius)) ' Same with the left or right sides
dx *= -1
vga.circle(bx, by, radius, vga#MAX_COLOR, false)
vga.wait_vsync()
iteration++
vga.clear()
report(testtime, iteration)
PUB demo_bitmap(testtime, bitmap_addr) | iteration
' Continuously redraws bitmap at address bitmap_addr
ser.str(@"demo_bitmap - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
vga.bitmap(bitmap_addr, 0, 0, XMAX, YMAX)
iteration++
report(testtime, iteration)
PUB demo_box(testtime) | iteration, c
' Draws random boxes
ser.str(@"demo_box - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
c := math.rndi(vga.MAX_COLOR)
vga.box(math.rndi(XMAX), math.rndi(YMAX), math.rndi(XMAX), math.rndi(YMAX), c, FALSE)
iteration++
report(testtime, iteration)
PUB demo_box_filled(testtime) | iteration, c
' Draws random filled boxes
ser.str(@"demo_box_filled - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
c := math.rndi(vga.MAX_COLOR)
vga.box(math.rndi(XMAX), math.rndi(YMAX), math.rndi(XMAX), math.rndi(YMAX), c, TRUE)
iteration++
report(testtime, iteration)
PUB demo_circle(testtime) | iteration, x, y, r, c
' Draws circles at random locations
ser.str(@"demo_circle - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
x := math.rndi(XMAX)
y := math.rndi(YMAX)
r := math.rndi(YMAX/2)
c := math.rndi(vga.MAX_COLOR)
vga.circle(x, y, r, c, false)
iteration++
report(testtime, iteration)
PUB demo_greet()
' Display the banner/greeting
vga.fgcolor(vga.MAX_COLOR)
vga.bgcolor(0)
vga.pos_xy(0, 1)
vga.printf("VGA 8bpp on the Parallax P2X8C4M64P @ %dMHz\n\r", clkfreq/1_000_000)
vga.printf("%dx%d", WIDTH, HEIGHT)
PUB demo_line(testtime) | iteration, c
' Draws random lines
ser.printf("demo_line - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
c := math.rndi(vga.MAX_COLOR)
vga.line(math.rndi(XMAX), math.rndi(YMAX), math.rndi(XMAX), math.rndi(YMAX), c)
iteration++
report(testtime, iteration)
PUB demo_linesweep_x(testtime) | iteration, x, c
' Draws lines sweeping from left-right to the opposite diagonal direction
x := 0
ser.printf("demo_linesweep_x - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
x++
if (x > XMAX)
x := 0
c++
if (c > vga.MAX_COLOR)
c := 0
vga.line(x, 0, XMAX-x, YMAX, c)
iteration++
report(testtime, iteration)
PUB demo_linesweep_y(testtime) | iteration, y, c
' Draws lines sweeping from top-down to the opposite diagonal direction
y := 0
ser.printf("demo_linesweep_y - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
y++
if (y > YMAX)
y := 0
c++
if (c > vga.MAX_COLOR)
c := 0
vga.line(XMAX, y, 0, YMAX-y, c)
iteration++
report(testtime, iteration)
PUB demo_mem_scroller(testtime, start_addr, end_addr) | iteration, pos, st, en
' Dumps Propeller Hub RAM (and/or ROM) to the display buffer
pos := start_addr
ser.printf("demo_mem_scroller - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
pos += BPL
if (pos > end_addr)
pos := start_addr
vga.bitmap(pos, 0, 0, XMAX, YMAX)
iteration++
report(testtime, iteration)
PUB demo_plot(testtime) | iteration, x, y, c
' Draws random pixels to the screen
ser.printf("demo_plot - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
c := math.rndi(vga.MAX_COLOR)
vga.plot(math.rndi(XMAX), math.rndi(YMAX), c)
iteration++
report(testtime, iteration)
PUB demo_shadebobs(testtime) | iteration, x, y, xs, ys, p, offset, div, modifier
' Draws shadebobs along a sine-wave
ser.printf("demo_shadebobs - ")
div := 1024
offset := YMAX/2
_timer_set := testtime
iteration := 0
repeat while _timer_set
repeat x from 0 to XMAX
modifier := (abs(getct()) / 1_000_000)
y := offset + math.sin(x * modifier) / div
repeat ys from y to y+10
repeat xs from x to x+10
p := vga.point(xs, ys) + 1
if (p > vga.MAX_COLOR)
p := 0
vga.plot(xs, ys, p)
iteration++
report(testtime, iteration)
PUB demo_sinewave(testtime) | iteration, x, y, modifier, offset, div
' Draws a sine wave the length of the screen, influenced by the system counter
ser.printf("demo_sinewave - ")
div := 1024
offset := YMAX/2 ' Offset for Y axis
_timer_set := testtime
iteration := 0
repeat while _timer_set
repeat x from 0 to XMAX
modifier := (abs(getct()) / 1_000_000) ' Use system counter as modifier
y := offset + math.sin(x * modifier) / div
vga.plot(x, y, vga.MAX_COLOR)
vga.wait_vsync()
iteration++
vga.clear()
report(testtime, iteration)
PUB demo_seq_text(testtime) | iteration, col, row, ch, fg, bg
' Sequentially draws the whole font table to the screen
ch := $20
ser.printf("demo_seq_text - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
ch++
if (ch > $7F)
ch := $20
fg++
if (fg > vga.MAX_COLOR)
fg := 0
bg--
if (bg < 0)
bg := vga.MAX_COLOR
vga.fgcolor(fg)
vga.bgcolor(bg)
vga.char(ch)
iteration++
report(testtime, iteration)
PUB demo_rnd_text(testtime) | iteration, col, row, fg, bg
' Draws random characters to the screen
ser.printf("demo_rnd_text - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
fg++
if (fg > vga.MAX_COLOR)
fg := 0
bg--
if (bg < 0)
bg := vga.MAX_COLOR
vga.fgcolor(fg)
vga.bgcolor(bg)
vga.char(32 #> math.rndi(127))
iteration++
report(testtime, iteration)
PUB demo_tri_wave(testtime) | iteration, x, y, ydir
' Draws a simple triangular wave
ydir := 1
y := 0
ser.printf("demo_tri_wave - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
repeat x from 0 to XMAX
if (y == YMAX)
ydir := -1
if (y == 0)
ydir := 1
y := y + ydir
vga.plot(x, y, vga.MAX_COLOR)
vga.wait_vsync()
vga.clear()
iteration++
report(testtime, iteration)
PUB demo_wander(testtime) | iteration, x, y, d, c, movestep
' Draws randomly wandering pixels
x := XMAX/2
y := YMAX/2
movestep := 2
ser.printf("demo_wander - ")
_timer_set := testtime
iteration := 0
repeat while _timer_set
case d := math.rndi(4)
1:
x += movestep
if x > XMAX
x := 0
2:
x -= movestep
if x < 0
x := XMAX
3:
y += movestep
if y > YMAX
y := 0
4:
y -= movestep
if y < 0
y := YMAX
c := math.rndi(vga.MAX_COLOR)
vga.plot(x, y, c)
iteration++
report(testtime, iteration)
PUB report(testtime, iterations) | msec
' Display performance results
msec := (testtime * 1_000) / iterations
ser.printf( @"Total iterations: %d, iterations/sec: %d, ms/iteration: %d.%03.3d\n\r", ...
iterations, ...
iterations / (testtime/1000), ...
(msec/1000), ...
(msec//1000) )
PUB cog_timer() | time_left
repeat
repeat until _timer_set
time_left := _timer_set
repeat
time_left--
waitms(1)
while (time_left > 0)
_timer_set := 0
PUB setup()
ser.start()
ser.clear()
ser.printf("Serial terminal started - p2 @ %dMHz\n\r", clkfreq/1000000)
vga.defaults()
vga.start()
ser.strln(@"VGA 8bpp driver started")
vga.set_font(fnt.ptr(), fnt.setup())
vga.char_attrs(vga.TERMINAL) ' don't print glyphs for codes like 'CR' and 'LF'
vga.clear()
_timer_cog := cogspin(NEWCOG, cog_timer(), @_stack_timer)
CON
WIDTH = vga.WIDTH
HEIGHT = vga.HEIGHT
XMAX = WIDTH-1
YMAX = HEIGHT-1
BPL = WIDTH
DAT
{
Copyright 2024 Jesse Burt
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
}