mirror of
https://github.com/irmen/prog8.git
synced 2024-06-26 07:29:32 +00:00
optimized text screen clear/fill and scrolling on c64
This commit is contained in:
Irmen de Jong
parent
00071d53d5
commit
4b53641e1d
|
|
@ -38,13 +38,13 @@ asmsub clear_screenchars (ubyte char @ A) clobbers(Y) {
|
|||
; ---- clear the character screen with the given fill character (leaves colors)
|
||||
; (assumes screen matrix is at the default address)
|
||||
%asm {{
|
||||
ldy #0
|
||||
_loop sta c64.Screen,y
|
||||
sta c64.Screen+$0100,y
|
||||
sta c64.Screen+$0200,y
|
||||
sta c64.Screen+$02e8,y
|
||||
iny
|
||||
bne _loop
|
||||
ldy #250
|
||||
- sta c64.Screen+250*0-1,y
|
||||
sta c64.Screen+250*1-1,y
|
||||
sta c64.Screen+250*2-1,y
|
||||
sta c64.Screen+250*3-1,y
|
||||
dey
|
||||
bne -
|
||||
rts
|
||||
}}
|
||||
}
|
||||
|
|
@ -53,13 +53,13 @@ asmsub clear_screencolors (ubyte color @ A) clobbers(Y) {
|
|||
; ---- clear the character screen colors with the given color (leaves characters).
|
||||
; (assumes color matrix is at the default address)
|
||||
%asm {{
|
||||
ldy #0
|
||||
_loop sta c64.Colors,y
|
||||
sta c64.Colors+$0100,y
|
||||
sta c64.Colors+$0200,y
|
||||
sta c64.Colors+$02e8,y
|
||||
iny
|
||||
bne _loop
|
||||
ldy #250
|
||||
- sta c64.Colors+250*0-1,y
|
||||
sta c64.Colors+250*1-1,y
|
||||
sta c64.Colors+250*2-1,y
|
||||
sta c64.Colors+250*3-1,y
|
||||
dey
|
||||
bne -
|
||||
rts
|
||||
}}
|
||||
}
|
||||
|
|
@ -83,29 +83,31 @@ asmsub scroll_left (ubyte alsocolors @ Pc) clobbers(A, Y) {
|
|||
|
||||
%asm {{
|
||||
stx P8ZP_SCRATCH_REG
|
||||
bcs +
|
||||
jmp _scroll_screen
|
||||
bcc _scroll_screen
|
||||
|
||||
+ ; scroll the color memory
|
||||
+ ; scroll the screen and the color memory
|
||||
ldx #0
|
||||
ldy #38
|
||||
-
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Colors + 40*row + 1,x
|
||||
sta c64.Colors + 40*row,x
|
||||
.next
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Screen + 40*row + 1,x
|
||||
sta c64.Screen + 40*row + 0,x
|
||||
lda c64.Colors + 40*row + 1,x
|
||||
sta c64.Colors + 40*row + 0,x
|
||||
.next
|
||||
inx
|
||||
dey
|
||||
bpl -
|
||||
rts
|
||||
|
||||
_scroll_screen ; scroll the screen memory
|
||||
_scroll_screen ; scroll only the screen memory
|
||||
ldx #0
|
||||
ldy #38
|
||||
-
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Screen + 40*row + 1,x
|
||||
sta c64.Screen + 40*row,x
|
||||
.next
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Screen + 40*row + 1,x
|
||||
sta c64.Screen + 40*row + 0,x
|
||||
.next
|
||||
inx
|
||||
dey
|
||||
bpl -
|
||||
|
|
@ -121,26 +123,28 @@ asmsub scroll_right (ubyte alsocolors @ Pc) clobbers(A) {
|
|||
; Carry flag determines if screen color data must be scrolled too
|
||||
%asm {{
|
||||
stx P8ZP_SCRATCH_REG
|
||||
bcs +
|
||||
jmp _scroll_screen
|
||||
bcc _scroll_screen
|
||||
|
||||
+ ; scroll the color memory
|
||||
+ ; scroll the screen and the color memory
|
||||
ldx #38
|
||||
-
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Colors + 40*row + 0,x
|
||||
sta c64.Colors + 40*row + 1,x
|
||||
.next
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Screen + 40*row + 0,x
|
||||
sta c64.Screen + 40*row + 1,x
|
||||
lda c64.Colors + 40*row + 0,x
|
||||
sta c64.Colors + 40*row + 1,x
|
||||
.next
|
||||
dex
|
||||
bpl -
|
||||
rts
|
||||
|
||||
_scroll_screen ; scroll the screen memory
|
||||
_scroll_screen ; scroll only the screen memory
|
||||
ldx #38
|
||||
-
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Screen + 40*row + 0,x
|
||||
sta c64.Screen + 40*row + 1,x
|
||||
.next
|
||||
.for row=0, row<=24, row+=1
|
||||
lda c64.Screen + 40*row + 0,x
|
||||
sta c64.Screen + 40*row + 1,x
|
||||
.next
|
||||
dex
|
||||
bpl -
|
||||
|
||||
|
|
@ -155,26 +159,28 @@ asmsub scroll_up (ubyte alsocolors @ Pc) clobbers(A) {
|
|||
; Carry flag determines if screen color data must be scrolled too
|
||||
%asm {{
|
||||
stx P8ZP_SCRATCH_REG
|
||||
bcs +
|
||||
jmp _scroll_screen
|
||||
bcc _scroll_screen
|
||||
|
||||
+ ; scroll the color memory
|
||||
+ ; scroll the screen and the color memory
|
||||
ldx #39
|
||||
-
|
||||
.for row=1, row<=24, row+=1
|
||||
lda c64.Colors + 40*row,x
|
||||
sta c64.Colors + 40*(row-1),x
|
||||
.next
|
||||
.for row=1, row<=24, row+=1
|
||||
lda c64.Screen + 40*row,x
|
||||
sta c64.Screen + 40*(row-1),x
|
||||
lda c64.Colors + 40*row,x
|
||||
sta c64.Colors + 40*(row-1),x
|
||||
.next
|
||||
dex
|
||||
bpl -
|
||||
rts
|
||||
|
||||
_scroll_screen ; scroll the screen memory
|
||||
_scroll_screen ; scroll only the screen memory
|
||||
ldx #39
|
||||
-
|
||||
.for row=1, row<=24, row+=1
|
||||
lda c64.Screen + 40*row,x
|
||||
sta c64.Screen + 40*(row-1),x
|
||||
.next
|
||||
.for row=1, row<=24, row+=1
|
||||
lda c64.Screen + 40*row,x
|
||||
sta c64.Screen + 40*(row-1),x
|
||||
.next
|
||||
dex
|
||||
bpl -
|
||||
|
||||
|
|
@ -189,26 +195,28 @@ asmsub scroll_down (ubyte alsocolors @ Pc) clobbers(A) {
|
|||
; Carry flag determines if screen color data must be scrolled too
|
||||
%asm {{
|
||||
stx P8ZP_SCRATCH_REG
|
||||
bcs +
|
||||
jmp _scroll_screen
|
||||
bcc _scroll_screen
|
||||
|
||||
+ ; scroll the color memory
|
||||
+ ; scroll the screen and the color memory
|
||||
ldx #39
|
||||
-
|
||||
.for row=23, row>=0, row-=1
|
||||
lda c64.Colors + 40*row,x
|
||||
sta c64.Colors + 40*(row+1),x
|
||||
.next
|
||||
.for row=23, row>=0, row-=1
|
||||
lda c64.Colors + 40*row,x
|
||||
sta c64.Colors + 40*(row+1),x
|
||||
lda c64.Screen + 40*row,x
|
||||
sta c64.Screen + 40*(row+1),x
|
||||
.next
|
||||
dex
|
||||
bpl -
|
||||
rts
|
||||
|
||||
_scroll_screen ; scroll the screen memory
|
||||
_scroll_screen ; scroll only the screen memory
|
||||
ldx #39
|
||||
-
|
||||
.for row=23, row>=0, row-=1
|
||||
lda c64.Screen + 40*row,x
|
||||
sta c64.Screen + 40*(row+1),x
|
||||
.next
|
||||
.for row=23, row>=0, row-=1
|
||||
lda c64.Screen + 40*row,x
|
||||
sta c64.Screen + 40*(row+1),x
|
||||
.next
|
||||
dex
|
||||
bpl -
|
||||
|
||||
|
|
|
|||
|
|
@ -17,7 +17,7 @@ main {
|
|||
|
||||
c64.SCROLX &= %11110111 ; 38 column mode
|
||||
|
||||
c64.set_rasterirq(1) ; enable animation
|
||||
c64.set_rasterirq(40) ; enable animation
|
||||
|
||||
ubyte target_height = 10
|
||||
ubyte active_height = 24
|
||||
|
|
|
|||
|
|
@ -41,7 +41,7 @@ main {
|
|||
rect(10, 10, 10, 10, false)
|
||||
rect(6, 0, 16, 20, true)
|
||||
|
||||
; test_stack.test()
|
||||
test_stack.test()
|
||||
|
||||
|
||||
sub rect(ubyte x1, ubyte y1, ubyte x2, ubyte y2, ubyte fill) {
|
||||
|
|
@ -140,21 +140,17 @@ main {
|
|||
ubyte xx
|
||||
|
||||
while x>=y {
|
||||
for xx in cx to cx+x {
|
||||
txt.setcc(xx, cy + y as ubyte, 81, 1)
|
||||
txt.setcc(xx, cy - y as ubyte, 81, 2)
|
||||
xx = cx-x
|
||||
repeat 2*x+1 {
|
||||
txt.setcc(xx, cy + y as ubyte, 81, 11)
|
||||
txt.setcc(xx, cy - y as ubyte, 81, 12)
|
||||
xx++
|
||||
}
|
||||
for xx in cx-x to cx-1 {
|
||||
txt.setcc(xx, cy + y as ubyte, 81, 3)
|
||||
txt.setcc(xx, cy - y as ubyte, 81, 4)
|
||||
}
|
||||
for xx in cx to cx+y {
|
||||
txt.setcc(xx, cy + x as ubyte, 81, 5)
|
||||
txt.setcc(xx, cy - x as ubyte, 81, 6)
|
||||
}
|
||||
for xx in cx-y to cx {
|
||||
txt.setcc(xx, cy + x as ubyte, 81, 7)
|
||||
txt.setcc(xx, cy - x as ubyte, 81, 8)
|
||||
xx = cx-y
|
||||
repeat 2*y+1 {
|
||||
txt.setcc(xx, cy + x as ubyte, 81, 13)
|
||||
txt.setcc(xx, cy - x as ubyte, 81, 14)
|
||||
xx++
|
||||
}
|
||||
y++
|
||||
if decisionOver2<=0
|
||||
|
|
|
|||
|
|
@ -7,27 +7,13 @@ main {
|
|||
sub start() {
|
||||
txt.fill_screen('.',2)
|
||||
|
||||
ubyte xx
|
||||
ubyte yy = 0
|
||||
for xx in 0 to txt.DEFAULT_WIDTH-1 {
|
||||
txt.setcc(xx, 0, xx, 1)
|
||||
txt.setcc(xx, txt.DEFAULT_HEIGHT-1, xx, 1)
|
||||
}
|
||||
for yy in 0 to txt.DEFAULT_HEIGHT-1 {
|
||||
txt.setcc(0, yy, yy,1)
|
||||
txt.setcc(txt.DEFAULT_WIDTH-1, yy, yy, 1)
|
||||
}
|
||||
|
||||
repeat {
|
||||
delay()
|
||||
txt.scroll_left(false)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
sub delay () {
|
||||
ubyte tt
|
||||
repeat 255 {
|
||||
repeat 55 {
|
||||
repeat 255 {
|
||||
tt++
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user