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Fix drawing with relative coords (ticket #116)

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Bobbi Webber-Manners 2022-09-22 23:41:52 -04:00
parent ec264aa4b0
commit 1aeacf29b6
3 changed files with 27 additions and 39 deletions
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BIN
applecorn.po
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33
auxmem.gfx.s
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@ -149,10 +149,6 @@ HGRPLOTTER2 LDA VDUQ+5,X
*
HGRPLOT JSR CVTCOORD ; Convert coordinate system
HGRPLOT2 LDA VDUQ+4
AND #$04 ; Bit 2 set -> absolute
BNE HGRPLOTABS
JSR RELCOORD ; Add coords to XPIXEL/YPIXEL
HGRPLOTABS LDA VDUQ+4
AND #$03
CMP #$0 ; Bits 0,1 clear -> just move
BNE HGRPLOTACT
@ -325,33 +321,4 @@ CVTCOORD
STA VDUQ+6
BRA :YCOORD
* Add coordinates to XPIXEL, YPIXEL
RELCOORD CLC
LDA XPIXEL+0
ADC VDUQ+5
STA VDUQ+5
LDA XPIXEL+1
ADC VDUQ+6
STA VDUQ+6
CLC
LDA YPIXEL
ADC VDUQ+7
STA VDUQ+7
RTS

33
auxmem.vdu.s
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@ -1063,16 +1063,17 @@ VDUCOPYEXIT RTS
* x is in VDUQ+5,VDUQ+6
* y is in VDUQ+7,VDUQ+8
*
VDU25 LDA VDUPIXELS
BEQ VDU25NULL
* TO DO:
* coord=coord+origin
* scale coord
* clip to viewport
JSR HGRPLOTTER
VDU25NULL LDX #7
VDU25 LDA VDUQ+4
AND #$04 ; Bit 2 set -> absolute
BNE :S0
JSR RELCOORD
:S0 LDX #7
VDU25BACKUP1 LDA PIXELPLOTX+0,X ; Copy pixel coords
STA PIXELPLOTX+4,X ; POSN becomes LAST
DEX ; and PLOT becomes POSN
@ -1084,13 +1085,33 @@ VDU25BACKUP2 LDA GFXPOSNX,X ; POSN becomes LAST
STA GFXPOSNX,X
DEX
BPL VDU25BACKUP2
LDA $C000 ; This and PRCHRC need to be
LDA VDUPIXELS
BEQ :S1
JSR HGRPLOTTER
:S1 LDA $C000 ; This and PRCHRC need to be
EOR #$80 ; made more generalised
BMI VDU25EXIT ; No key pressed
JSR KBDCHKESC ; Ask KBD to test if Escape
VDU25EXIT RTS
* Add coordinates to GFXPOSNX, GFXPOSNY
RELCOORD CLC
LDA GFXPOSNX+0
ADC VDUQ+5
STA VDUQ+5
LDA GFXPOSNX+1
ADC VDUQ+6
STA VDUQ+6
CLC
LDA GFXPOSNY+0
ADC VDUQ+7
STA VDUQ+7
LDA GFXPOSNY+1
ADC VDUQ+8
STA VDUQ+8
RTS
* Program video system and define characters
********************************************
VDU23 RTS