Apple-2gs-SW/iigs-game-engine
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iigs-game-engine/demos/shell/font.s

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More play-around
2020-08-23 05:25:39 +00:00
****************************************
* FONT ENGINE (v3?) *
* *
* Dagen Brock <dagenbrock@gmail.com> *
* 2013-07-20 *
****************************************
* A= ptr to string preceded by length *
* X= screen location *
****************************************
; each char:
; draw char at loc
; update loc
; see if length hit - no? back to draw char
rel
mx %00
]F_Length ds 2 ;length of string (only one byte currently used)
]F_CharIdx ds 2 ;index of current character
]F_CurrentPos ds 2 ;current top left char position
Fix addressing issue in font routine and data-overwrite bug; Render no longer crashes!
2021-07-10 22:15:35 +00:00
]F_StrPtr equ $01 ;pointer to string (including length byte) / DP
]F_StrClr equ $03
More play-around
2020-08-23 05:25:39 +00:00
DrawString
Fix addressing issue in font routine and data-overwrite bug; Render no longer crashes!
2021-07-10 22:15:35 +00:00
pha ; local variable space
pha
tsc
phd
tcd
; sta ]F_StrPtr ; (done in pha init above) store at dp 0 ($00) for indirect loads
More play-around
2020-08-23 05:25:39 +00:00
stx ]F_CurrentPos
sty ]F_StrClr
stz ]F_CharIdx
lda (]F_StrPtr)
and #$00ff ;strip off first char (len is only one byte)
sta ]F_Length ;get our length byte
NextChar lda ]F_CharIdx
cmp ]F_Length
bne :notDone
Fix tile rendering This is not quite correct yet. IT appears that two rows or columns are drawn on the edges when only a single solumn or row is necessary. Also, this code is based on the old GTE codebase, so the initial rectangle for rendering tiles is width+1, height+1. This can be improved.
2021-08-10 12:59:14 +00:00
ldy ]F_StrClr ;restore the color pattern
Fix addressing issue in font routine and data-overwrite bug; Render no longer crashes!
2021-07-10 22:15:35 +00:00
pld
pla
pla
More play-around
2020-08-23 05:25:39 +00:00
rts ;DONE! Return to caller
:notDone inc ]F_CharIdx
ldy ]F_CharIdx
Fix addressing issue in font routine and data-overwrite bug; Render no longer crashes!
2021-07-10 22:15:35 +00:00
lda (]F_StrPtr),y ;get next char!
More play-around
2020-08-23 05:25:39 +00:00
and #$00FF ;mask high byte
sec
sbc #' ' ;our table starts with space ' '
asl ;*2
tay
ldx ]F_CurrentPos
jsr :drawChar
inc ]F_CurrentPos ;compare to addition time (?)
inc ]F_CurrentPos
inc ]F_CurrentPos
inc ]F_CurrentPos ;update screen pos (2 words=8 pixels)
bra NextChar
;x = TopLeft screen pos
;y = char table offset
:drawChar lda FontTable,y ;get real address of char data
sec
sbc #FontData ;pivot offset - now a is offset of fontdata
tay ;so we'll index with that
lda FontData,y
and ]F_StrClr
stal $E12000,x
lda FontData+2,y
and ]F_StrClr
stal $E12000+2,x
lda FontData+4,y
and ]F_StrClr
stal $E12000+160,x
lda FontData+6,y
and ]F_StrClr
stal $E12000+160+2,x
lda FontData+8,y
and ]F_StrClr
stal {$E12000+160*2},x
lda FontData+10,y
and ]F_StrClr
stal {$E12000+160*2+2},x
lda FontData+12,y
and ]F_StrClr
stal {$E12000+160*3},x
lda FontData+14,y
and ]F_StrClr
stal {$E12000+160*3+2},x
lda FontData+16,y
and ]F_StrClr
stal {$E12000+160*4},x
lda FontData+18,y
and ]F_StrClr
stal {$E12000+160*4+2},x
lda FontData+20,y
and ]F_StrClr
stal {$E12000+160*5},x
lda FontData+22,y
and ]F_StrClr
stal {$E12000+160*5+2},x
rts
FontTable dw s_Space
dw s_Exclaim
dw s_Quote
dw s_Number
dw s_Dollar
dw s_Percent
dw s_Amper
dw s_Single
dw s_OpenParen
dw s_CloseParen
dw s_Asterix
dw s_Plus
dw s_Comma
dw s_Minus
dw s_Period
dw s_Slash
dw s_N0
dw s_N1
dw s_N2
dw s_N3
dw s_N4
dw s_N5
dw s_N6
dw s_N7
dw s_N8
dw s_N9
dw s_Colon
dw s_Semi
dw s_LAngle
dw s_Equal
dw s_RAngle
dw s_Question
dw s_At
dw s_A
dw s_B
dw s_C
dw s_D
dw s_E
dw s_F
dw s_G
dw s_H
dw s_I
dw s_J
dw s_K
dw s_L
dw s_M
dw s_N
dw s_O
dw s_P
dw s_Q
dw s_R
dw s_S
dw s_T
dw s_U
dw s_V
dw s_W
dw s_X
dw s_Y
dw s_Z
dw s_LBracket
dw s_BackSlash
dw s_RBracket
dw s_Carot
dw s_UnderLine
FontData = *
s_Space hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex 00000000
s_Exclaim hex 000FF000
hex 000FF000
hex 000FF000
hex 000FF000
hex 00000000
hex 000FF000
s_Quote hex 0FF00FF0
hex 00F000F0
hex 00000000
hex 00000000
hex 00000000
hex 00000000
s_Number hex 00000000
hex 00F00F00
hex 0FFFFFF0
hex 00F00F00
hex 0FFFFFF0
hex 00F00F00
s_Dollar hex 000F0F00
hex 00FFFFF0
hex 0F0F0F00
hex 00FFFF00
hex 000F0FF0
hex 0FFFFF00
s_Percent hex 0FF000F0
hex 00000F00
hex 0000F000
hex 000F0000
hex 00F00000
hex 0F000FF0
s_Amper hex 000FF000
hex 00F00F00
hex 0F00F000
hex 00F000F0
hex 0F0FFF00
hex 00F0F000
s_Single hex 000FF000
hex 0000F000
hex 00000000
hex 00000000
hex 00000000
hex 00000000
s_OpenParen hex 000FF000
hex 00FF0000
hex 0FF00000
hex 0FF00000
hex 00FF0000
hex 000FF000
s_CloseParen hex 000FF000
hex 0000FF00
hex 00000FF0
hex 00000FF0
hex 0000FF00
hex 000FF000
s_Asterix hex 00000000
hex 00F0F0F0
hex 000FFF00
hex 00FFFFF0
hex 000FFF00
hex 00F0F0F0
s_Plus hex 000F0000
hex 000F0000
hex 0FFFFF00
hex 000F0000
hex 000F0000
hex 00000000
s_Comma hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex 0000FF00
hex 0000F000
s_Minus hex 00000000
hex 00000000
hex 0FFFFF00
hex 00000000
hex 00000000
hex 00000000
s_Period hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex 0000FF00
hex 0000FF00
s_Slash hex 000000F0
hex 00000F00
hex 0000F000
hex 000F0000
hex 00F00000
hex 0F000000
s_N0 hex 00FFFF00
hex 0F000FF0
hex 0F00F0F0
hex 0F0F00F0
hex 0FF000F0
hex 00FFFF00
s_N1 hex 000F0000
hex 00FF0000
hex 000F0000
hex 000F0000
hex 000F0000
hex 00FFF000
s_N2 hex 00FFFF00
hex 0F0000F0
hex 00000F00
hex 000FF000
hex 00F00000
hex 0FFFFFF0
s_N3 hex 00FFFF00
hex 000000F0
hex 000FFF00
hex 000000F0
hex 000000F0
hex 00FFFF00
s_N4 hex 0000FF00
hex 000F0F00
hex 00F00F00
hex 0FFFFFF0
hex 00000F00
hex 00000F00
s_N5 hex 0FFFFFF0
hex 0F000000
hex 0FFFFF00
hex 000000F0
hex 0F0000F0
hex 00FFFF00
s_N6 hex 000FFF00
hex 00F00000
hex 0F000000
hex 0FFFFF00
hex 0F0000F0
hex 00FFFFF0
s_N7 hex 0FFFFFF0
hex 000000F0
hex 00000F00
hex 0000F000
hex 000F0000
hex 000F0000
s_N8 hex 00FFFF00
hex 0F0000F0
hex 00FFFF00
hex 0F0000F0
hex 0F0000F0
hex 00FFFF00
s_N9 hex 00FFFF00
hex 0F0000F0
hex 00FFFF00
hex 0000F000
hex 000F0000
hex 00F00000
s_Colon hex 000FF000
hex 000FF000
hex 00000000
hex 000FF000
hex 000FF000
hex 00000000
s_Semi hex 00000000
hex 000FF000
hex 000FF000
hex 00000000
hex 000FF000
hex 000F0000
s_LAngle hex 0000F000
hex 000F0000
hex 00F00000
hex 000F0000
hex 0000F000
hex 00000000
s_Equal hex 00000000
hex 00000000
hex 0FFFFF00
hex 00000000
hex 0FFFFF00
hex 00000000
s_RAngle hex 0000F000
hex 00000F00
hex 000000F0
hex 00000F00
hex 0000F000
hex 00000000
s_Question hex 00FFF000
hex 0F000F00
hex 00000F00
hex 000FF000
hex 00000000
hex 000FF000
s_At hex 00FFFF00
hex 0F0000F0
hex 0F00F0F0
hex 0FFFF0F0
hex 000000F0
hex 0FFFFF00
s_A hex 000FF000
hex 00F00F00
hex 0F0000F0
hex 0FFFFFF0
hex 0F0000F0
hex 0F0000F0
s_B hex 0FFFFF00
hex 0F0000F0
hex 0FFFFF00
hex 0F0000F0
hex 0F0000F0
hex 0FFFFF00
s_C hex 00FFFFF0
hex 0F000000
hex 0F000000
hex 0F000000
hex 0F000000
hex 00FFFFF0
s_D hex 0FFFFF00
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 0FFFFF00
s_E hex 0FFFFFF0
hex 0F000000
hex 0FFFF000
hex 0F000000
hex 0F000000
hex 0FFFFFF0
s_F hex 0FFFFFF0
hex 0F000000
hex 0FFFF000
hex 0F000000
hex 0F000000
hex 0F000000
s_G hex 00FFFFF0
hex 0F000000
hex 0F000000
hex 0F00FFF0
hex 0F0000F0
hex 00FFFF00
s_H hex 0F0000F0
hex 0F0000F0
hex 0FFFFFF0
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
s_I hex 0FFFFF00
hex 000F0000
hex 000F0000
hex 000F0000
hex 000F0000
hex 0FFFFF00
s_J hex 000000F0
hex 000000F0
hex 000000F0
hex 0F0000F0
hex 0F0000F0
hex 00FFFF00
s_K hex 0F000F00
hex 0F00F000
hex 0FFF0000
hex 0F00F000
hex 0F000F00
hex 0F000F00
s_L hex 0F000000
hex 0F000000
hex 0F000000
hex 0F000000
hex 0F000000
hex 0FFFFFF0
s_M hex 0F0000F0
hex 0FF00FF0
hex 0F0FF0F0
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
s_N hex 0F0000F0
hex 0FF000F0
hex 0F0F00F0
hex 0F00F0F0
hex 0F000FF0
hex 0F0000F0
s_O hex 00FFFF00
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 00FFFF00
s_P hex 0FFFFF00
hex 0F0000F0
hex 0FFFFF00
hex 0F000000
hex 0F000000
hex 0F000000
s_Q hex 00FFFF00
hex 0F0000F0
hex 0F0000F0
hex 0F00F0F0
hex 0F000FF0
hex 00FFFFF0
s_R hex 0FFFFF00
hex 0F0000F0
hex 0FFFFF00
hex 0F000F00
hex 0F0000F0
hex 0F0000F0
s_S hex 00FFFFF0
hex 0F000000
hex 00FFFF00
hex 000000F0
hex 000000F0
hex 0FFFFF00
s_T hex 0FFFFF00
hex 000F0000
hex 000F0000
hex 000F0000
hex 000F0000
hex 000F0000
s_U hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 00FFFF00
s_V hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 00F00F00
hex 000FF000
s_W hex 0F0000F0
hex 0F0000F0
hex 0F0000F0
hex 0F0FF0F0
hex 0FF00FF0
hex 0F0000F0
s_X hex 0F0000F0
hex 00F00F00
hex 000FF000
hex 000FF000
hex 00F00F00
hex 0F0000F0
s_Y hex F00000F0
hex 0F000F00
hex 00F0F000
hex 000F0000
hex 000F0000
hex 000F0000
s_Z hex 0FFFFFF0
hex 00000F00
hex 0000F000
hex 000F0000
hex 00F00000
hex 0FFFFFF0
s_LBracket hex 000FFF00
hex 000F0000
hex 000F0000
hex 000F0000
hex 000F0000
hex 000FFF00
s_BackSlash hex 0F000000
hex 00F00000
hex 000F0000
hex 0000F000
hex 00000F00
hex 000000F0
s_RBracket hex 00FFF000
hex 0000F000
hex 0000F000
hex 0000F000
hex 0000F000
hex 00FFF000
s_Carot hex 0000F000
hex 000F0F00
hex 00F000F0
hex 00000000
hex 00000000
hex 00000000
s_UnderLine hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex FFFFFFF0
s_Template hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex 00000000
hex 00000000
Fix addressing issue in font routine and data-overwrite bug; Render no longer crashes!
2021-07-10 22:15:35 +00:00
More play-around
2020-08-23 05:25:39 +00:00
Fix tile rendering This is not quite correct yet. IT appears that two rows or columns are drawn on the edges when only a single solumn or row is necessary. Also, this code is based on the old GTE codebase, so the initial rectangle for rendering tiles is width+1, height+1. This can be improved.
2021-08-10 12:59:14 +00:00
More play-around
2020-08-23 05:25:39 +00:00
Reorg files; focus on S16 artifact
2021-03-22 02:59:54 +00:00
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