mirror of
https://github.com/irmen/prog8.git
synced 2024-11-19 11:32:17 +00:00
240 lines
6.9 KiB
Lua
240 lines
6.9 KiB
Lua
%import textio
|
|
%import graphics
|
|
%import test_stack
|
|
%zeropage basicsafe
|
|
%option no_sysinit
|
|
|
|
; TODO full-screen graphics mode library, in development. (as replacement for the graphics routines in ROM that are constrained to 200 vertical pixels and lores mode only)
|
|
|
|
|
|
main {
|
|
|
|
sub start () {
|
|
ubyte[] modes = [0, 1, 128]
|
|
ubyte mode
|
|
for mode in modes {
|
|
gfx2.set_mode(mode)
|
|
draw()
|
|
cx16.wait(120)
|
|
}
|
|
}
|
|
|
|
sub draw() {
|
|
uword offset
|
|
ubyte angle
|
|
uword x
|
|
uword y
|
|
when gfx2.active_mode {
|
|
0, 1 -> {
|
|
for offset in 0 to 90 step 3 {
|
|
for angle in 0 to 255 {
|
|
x = $0008+sin8u(angle)/2
|
|
y = $0008+cos8u(angle)/2
|
|
gfx2.plot(x+offset*2,y+offset, lsb(x+y))
|
|
}
|
|
}
|
|
}
|
|
128 -> {
|
|
for offset in 0 to 190 step 6 {
|
|
for angle in 0 to 255 {
|
|
x = $0008+sin8u(angle)
|
|
y = $0008+cos8u(angle)
|
|
gfx2.plot(x+offset*2,y+offset, 1)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
gfx2 {
|
|
|
|
; read-only control variables:
|
|
ubyte active_mode = 255
|
|
uword width = 0
|
|
uword height = 0
|
|
ubyte bpp = 0
|
|
|
|
sub set_mode(ubyte mode) {
|
|
; mode 0 = bitmap 320 x 240 x 1c monochrome
|
|
; mode 1 = bitmap 320 x 240 x 256c
|
|
; mode 128 = bitmap 640 x 480 x 1c monochrome
|
|
; ...other modes?
|
|
|
|
when mode {
|
|
0 -> {
|
|
; 320 x 240 x 1c
|
|
cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000 ; enable only layer 1
|
|
cx16.VERA_DC_HSCALE = 64
|
|
cx16.VERA_DC_VSCALE = 64
|
|
cx16.VERA_L1_CONFIG = %00000100
|
|
cx16.VERA_L1_MAPBASE = 0
|
|
cx16.VERA_L1_TILEBASE = 0
|
|
width = 320
|
|
height = 240
|
|
bpp = 1
|
|
}
|
|
1 -> {
|
|
; 320 x 240 x 256c
|
|
cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000 ; enable only layer 1
|
|
cx16.VERA_DC_HSCALE = 64
|
|
cx16.VERA_DC_VSCALE = 64
|
|
cx16.VERA_L1_CONFIG = %00000111
|
|
cx16.VERA_L1_MAPBASE = 0
|
|
cx16.VERA_L1_TILEBASE = 0
|
|
width = 320
|
|
height = 240
|
|
bpp = 8
|
|
}
|
|
128 -> {
|
|
; 640 x 480 x 1c
|
|
cx16.VERA_DC_VIDEO = (cx16.VERA_DC_VIDEO & %11001111) | %00100000 ; enable only layer 1
|
|
cx16.VERA_DC_HSCALE = 128
|
|
cx16.VERA_DC_VSCALE = 128
|
|
cx16.VERA_L1_CONFIG = %00000100
|
|
cx16.VERA_L1_MAPBASE = 0
|
|
cx16.VERA_L1_TILEBASE = %00000001
|
|
width = 640
|
|
height = 480
|
|
bpp = 1
|
|
}
|
|
}
|
|
active_mode = mode
|
|
clear_screen()
|
|
}
|
|
|
|
sub clear_screen() {
|
|
cx16.VERA_CTRL = 0
|
|
cx16.VERA_ADDR_H = %00010000
|
|
cx16.VERA_ADDR_M = 0
|
|
cx16.VERA_ADDR_L = 0
|
|
when active_mode {
|
|
0 -> {
|
|
; 320 x 240 x 1c
|
|
repeat 240/2/8
|
|
cs_innerloop640()
|
|
}
|
|
1 -> {
|
|
; 320 x 240 x 256c
|
|
repeat 240/2
|
|
cs_innerloop640()
|
|
}
|
|
128 -> {
|
|
; 640 x 480 x 1c
|
|
repeat 480/8
|
|
cs_innerloop640()
|
|
}
|
|
}
|
|
}
|
|
|
|
sub plot(uword x, uword y, ubyte color) {
|
|
ubyte[8] bits = [128, 64, 32, 16, 8, 4, 2, 1]
|
|
when active_mode {
|
|
0 -> cx16.vpoke_or(0, y*(320/8) + x/8, bits[lsb(x)&7])
|
|
128 -> cx16.vpoke_or(0, y*(640/8) + x/8, bits[lsb(x)&7])
|
|
1 -> {
|
|
void addr_mul_320_add_24(y, x) ; 24 bits result is in r0 and r1L
|
|
cx16.vpoke(lsb(cx16.r1), cx16.r0, color)
|
|
}
|
|
}
|
|
; activate vera auto-increment mode so next_pixel() can be used after this
|
|
cx16.VERA_ADDR_H = (cx16.VERA_ADDR_H & %00000111) | %00010000
|
|
return
|
|
}
|
|
|
|
sub location(uword x, uword y) {
|
|
when active_mode {
|
|
0 -> cx16.vaddr(0, y*(320/8) + x/8, 0, 1)
|
|
128 -> cx16.vaddr(0, y*(640/8) + x/8, 0, 1)
|
|
1 -> {
|
|
void addr_mul_320_add_24(y, x) ; 24 bits result is in r0 and r1L
|
|
cx16.vaddr(lsb(cx16.r1), cx16.r0, 0, 1)
|
|
}
|
|
}
|
|
}
|
|
|
|
asmsub next_pixel(ubyte color @A) {
|
|
; -- sets the next pixel byte to the graphics chip.
|
|
; for 8 bpp screens this will plot 1 pixel. for 1 bpp screens it will actually plot 8 pixels at once (bitmask).
|
|
%asm {{
|
|
sta cx16.VERA_DATA0
|
|
rts
|
|
}}
|
|
}
|
|
|
|
sub next_pixels(uword pixels, uword amount) {
|
|
repeat msb(amount) {
|
|
repeat 256 {
|
|
cx16.VERA_DATA0 = @(pixels)
|
|
pixels++
|
|
}
|
|
}
|
|
repeat lsb(amount) {
|
|
cx16.VERA_DATA0 = @(pixels)
|
|
pixels++
|
|
}
|
|
}
|
|
|
|
asmsub cs_innerloop640() {
|
|
%asm {{
|
|
ldy #80
|
|
- stz cx16.VERA_DATA0
|
|
stz cx16.VERA_DATA0
|
|
stz cx16.VERA_DATA0
|
|
stz cx16.VERA_DATA0
|
|
stz cx16.VERA_DATA0
|
|
stz cx16.VERA_DATA0
|
|
stz cx16.VERA_DATA0
|
|
stz cx16.VERA_DATA0
|
|
dey
|
|
bne -
|
|
rts
|
|
}}
|
|
}
|
|
|
|
asmsub addr_mul_320_add_24(uword address @R0, uword value @AY) -> uword @R0, ubyte @R1 {
|
|
%asm {{
|
|
sta P8ZP_SCRATCH_W1
|
|
sty P8ZP_SCRATCH_W1+1
|
|
lda cx16.r0
|
|
sta P8ZP_SCRATCH_B1
|
|
lda cx16.r0+1
|
|
sta cx16.r1
|
|
sta P8ZP_SCRATCH_REG
|
|
lda cx16.r0
|
|
asl a
|
|
rol P8ZP_SCRATCH_REG
|
|
asl a
|
|
rol P8ZP_SCRATCH_REG
|
|
asl a
|
|
rol P8ZP_SCRATCH_REG
|
|
asl a
|
|
rol P8ZP_SCRATCH_REG
|
|
asl a
|
|
rol P8ZP_SCRATCH_REG
|
|
asl a
|
|
rol P8ZP_SCRATCH_REG
|
|
sta cx16.r0
|
|
lda P8ZP_SCRATCH_B1
|
|
clc
|
|
adc P8ZP_SCRATCH_REG
|
|
sta cx16.r0+1
|
|
bcc +
|
|
inc cx16.r1
|
|
+ ; now add the value to this 24-bits number
|
|
lda cx16.r0
|
|
clc
|
|
adc P8ZP_SCRATCH_W1
|
|
sta cx16.r0
|
|
lda cx16.r0+1
|
|
adc P8ZP_SCRATCH_W1+1
|
|
sta cx16.r0+1
|
|
bcc +
|
|
inc cx16.r1
|
|
+ lda cx16.r1
|
|
rts
|
|
}}
|
|
}
|
|
|
|
}
|