Apple-2-SW/prog8
1
0
Fork 0
mirror of https://github.com/irmen/prog8.git synced 2025-01-12 04:30:03 +00:00
Code Issues Projects Releases Wiki Activity

optimized gfx2.vertical_line for lores monochrome mode

Browse Source
This commit is contained in:
Irmen de Jong 2021-04-28 01:00:50 +02:00
parent a5961cbeab
commit 481214c46e
2 changed files with 66 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
compiler/res/prog8lib/cx16/gfx2.p8
View File

@ -293,17 +293,67 @@ _done
sub vertical_line(uword x, uword y, uword height, ubyte color) {
when active_mode {
1, 5 -> {
; monochrome, either resolution
1 -> {
; monochrome, lo-res
cx16.r15L = gfx2.plot.bits[x as ubyte & 7] ; bitmask
if color {
if monochrome_dont_stipple_flag {
; draw continuous line.
position2(x,y,true)
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | (11<<4) ; 40 increment = 1 line in 320 px monochrome
cx16.VERA_CTRL = 1
cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | (11<<4) ; 40 increment = 1 line in 320 px monochrome
repeat height {
%asm {{
lda cx16.VERA_DATA0
ora cx16.r15L
sta cx16.VERA_DATA1
}}
}
} else {
; draw stippled line.
if x&1 {
y++
height--
}
position2(x,y,true)
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | (12<<4) ; 80 increment = 2 line in 320 px monochrome
cx16.VERA_CTRL = 1
cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | (12<<4) ; 80 increment = 2 line in 320 px monochrome
repeat height/2 {
%asm {{
lda cx16.VERA_DATA0
ora cx16.r15L
sta cx16.VERA_DATA1
}}
}
}
} else {
position2(x,y,true)
cx16.r15 = ~cx16.r15 ; erase pixels
cx16.VERA_CTRL = 0
cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | (11<<4) ; 40 increment = 1 line in 320 px monochrome
cx16.VERA_CTRL = 1
cx16.VERA_ADDR_H = cx16.VERA_ADDR_H & %00000111 | (11<<4) ; 40 increment = 1 line in 320 px monochrome
repeat height {
%asm {{
lda cx16.VERA_DATA0
and cx16.r15L
sta cx16.VERA_DATA1
}}
}
}
}
5 -> {
; monochrome, highres
; note for the 1 bpp modes we can't use vera's auto increment mode because we have to 'or' the pixel data in place.
; TODO use TWO vera adress pointers simultaneously one for reading, one for writing, so auto-increment IS possible
position(x,y)
cx16.VERA_ADDR_H &= %00000111 ; no auto advance
cx16.r15 = gfx2.plot.bits[x as ubyte & 7] ; bitmask
if active_mode==5
cx16.r14 = 640/8
else
cx16.r14 = 320/8
cx16.r14 = 640/8
if color {
if monochrome_dont_stipple_flag {
repeat height {

26
examples/test.p8
View File

@ -4,30 +4,24 @@
main {
sub start() {
gfx2.screen_mode(6) ; high res 4 colors
gfx2.screen_mode(1) ; lo res monochrome
gfx2.text_charset(3)
gfx2.text(10, 10, 1, @"Hello!")
c64.SETTIM(0,0,0)
repeat 1 {
repeat 4 {
uword xx
; gfx2.monochrome_stipple(true)
; for xx in 0 to 639 {
; gfx2.vertical_line(xx, 20, 220, 1)
; }
; gfx2.monochrome_stipple(false)
for xx in 0 to 639 {
gfx2.vertical_line(xx, 20, 450, 1)
gfx2.monochrome_stipple(true)
for xx in 0 to 319 {
gfx2.vertical_line(xx, 20, 210, 1)
}
for xx in 0 to 639 {
gfx2.vertical_line(xx, 20, 450, 2)
gfx2.monochrome_stipple(false)
for xx in 0 to 319 {
gfx2.vertical_line(xx, 20, 210, 1)
}
for xx in 0 to 639 {
gfx2.vertical_line(xx, 20, 450, 3)
}
for xx in 0 to 639 {
gfx2.vertical_line(xx, 20, 450, 0)
for xx in 0 to 319 {
gfx2.vertical_line(xx, 20, 210, 0)
}
}