mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 15:29:46 +00:00
e506719f43
git-svn-id: svn://svn.cc65.org/cc65/trunk@3316 b7a2c559-68d2-44c3-8de9-860c34a00d81
1000 lines
24 KiB
ArmAsm
1000 lines
24 KiB
ArmAsm
;
|
|
; Graphics driver for the 160x102x16 mode on the Lynx.
|
|
;
|
|
; All the drawing functions are simply done by sprites as the sprite
|
|
; engine is the only way to do fast graphics on a Lynx.
|
|
;
|
|
; So the code is not really based on any algorithms done by somebody.
|
|
; I have looked at other routines in the cc65 libs to see what kind of
|
|
; entry points we need. And I have looked at the old cc65 libs by
|
|
; Bastian Schick to see how things worked in the past.
|
|
;
|
|
; This code is written by Karri Kaksonen, 2004 for the cc65 compiler.
|
|
;
|
|
|
|
.include "zeropage.inc"
|
|
.include "extzp.inc"
|
|
|
|
.include "tgi-kernel.inc"
|
|
.include "tgi-mode.inc"
|
|
.include "tgi-error.inc"
|
|
|
|
.include "lynx.inc"
|
|
|
|
.macpack generic
|
|
|
|
; ------------------------------------------------------------------------
|
|
; Header. Includes jump table and constants.
|
|
|
|
.segment "JUMPTABLE"
|
|
|
|
; First part of the header is a structure that has a magic and defines the
|
|
; capabilities of the driver
|
|
|
|
.byte $74, $67, $69 ; "tgi"
|
|
.byte TGI_API_VERSION ; TGI API version number
|
|
.word 160 ; X resolution
|
|
.word 102 ; Y resolution
|
|
.byte 16 ; Number of drawing colors
|
|
.byte 2 ; Number of screens available
|
|
.byte 8 ; System font X size
|
|
.byte 8 ; System font Y size
|
|
.res 4, $00 ; Reserved for future extensions
|
|
|
|
; Next comes the jump table. Currently all entries must be valid and may point
|
|
; to an RTS for test versions (function not implemented). A future version may
|
|
; allow for emulation: In this case the vector will be zero. Emulation means
|
|
; that the graphics kernel will emulate the function by using lower level
|
|
; primitives - for example ploting a line by using calls to SETPIXEL.
|
|
|
|
.addr INSTALL
|
|
.addr UNINSTALL
|
|
.addr INIT
|
|
.addr DONE
|
|
.addr GETERROR
|
|
.addr CONTROL
|
|
.addr CLEAR
|
|
.addr SETVIEWPAGE
|
|
.addr SETDRAWPAGE
|
|
.addr SETCOLOR
|
|
.addr SETPALETTE
|
|
.addr GETPALETTE
|
|
.addr GETDEFPALETTE
|
|
.addr SETPIXEL
|
|
.addr GETPIXEL
|
|
.addr LINE
|
|
.addr BAR
|
|
.addr CIRCLE
|
|
.addr TEXTSTYLE
|
|
.addr OUTTEXT
|
|
.addr 0 ; IRQ entry is unused
|
|
|
|
|
|
; ------------------------------------------------------------------------
|
|
; Data.
|
|
|
|
; Variables mapped to the zero page segment variables. Some of these are
|
|
; used for passing parameters to the driver.
|
|
|
|
X1 := ptr1
|
|
Y1 := ptr2
|
|
X2 := ptr3
|
|
Y2 := ptr4
|
|
|
|
STRPTR := ptr3
|
|
FONTOFF := ptr4
|
|
STROFF := tmp3
|
|
STRLEN := tmp4
|
|
|
|
; Absolute variables used in the code
|
|
|
|
.bss
|
|
|
|
ERROR: .res 1 ; Error code
|
|
|
|
DRAWINDEX: .res 1 ; Pen to use for drawing
|
|
VIEWPAGEL: .res 1
|
|
VIEWPAGEH: .res 1
|
|
DRAWPAGEL: .res 1
|
|
DRAWPAGEH: .res 1
|
|
|
|
; Text output stuff
|
|
TEXTMAGX: .res 1
|
|
TEXTMAGY: .res 1
|
|
TEXTDIR: .res 1
|
|
BGINDEX: .res 1 ; Pen to use for text background
|
|
|
|
text_bitmap: .res 8*(1+20+1)+1
|
|
; 8 rows with (one offset-byte plus 20 character bytes plus one fill-byte) plus one 0-offset-byte
|
|
|
|
; Constants and tables
|
|
|
|
.rodata
|
|
|
|
DEFPALETTE: .byte >$000
|
|
.byte >$007
|
|
.byte >$070
|
|
.byte >$700
|
|
.byte >$077
|
|
.byte >$770
|
|
.byte >$707
|
|
.byte >$777
|
|
.byte >$333
|
|
.byte >$00F
|
|
.byte >$0F0
|
|
.byte >$F00
|
|
.byte >$0FF
|
|
.byte >$FF0
|
|
.byte >$F0F
|
|
.byte >$FFF
|
|
.byte <$000
|
|
.byte <$007
|
|
.byte <$070
|
|
.byte <$700
|
|
.byte <$077
|
|
.byte <$770
|
|
.byte <$707
|
|
.byte <$777
|
|
.byte <$333
|
|
.byte <$00F
|
|
.byte <$0F0
|
|
.byte <$F00
|
|
.byte <$0FF
|
|
.byte <$FF0
|
|
.byte <$F0F
|
|
.byte <$FFF
|
|
|
|
PALETTESIZE = * - DEFPALETTE
|
|
|
|
.code
|
|
|
|
; ------------------------------------------------------------------------
|
|
; INSTALL routine. Is called after the driver is loaded into memory. May
|
|
; initialize anything that has to be done just once. Is probably empty
|
|
; most of the time.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
INSTALL:
|
|
lda #1
|
|
sta TEXTMAGX
|
|
sta TEXTMAGY
|
|
stz BGINDEX
|
|
rts
|
|
|
|
|
|
; ------------------------------------------------------------------------
|
|
; UNINSTALL routine. Is called before the driver is removed from memory. May
|
|
; clean up anything done by INSTALL but is probably empty most of the time.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
UNINSTALL:
|
|
rts
|
|
|
|
|
|
; ------------------------------------------------------------------------
|
|
; INIT: Changes an already installed device from text mode to graphics
|
|
; mode.
|
|
; Note that INIT/DONE may be called multiple times while the driver
|
|
; is loaded, while INSTALL is only called once, so any code that is needed
|
|
; to initializes variables and so on must go here. Setting palette and
|
|
; clearing the screen is not needed because this is called by the graphics
|
|
; kernel later.
|
|
; The graphics kernel will never call INIT when a graphics mode is already
|
|
; active, so there is no need to protect against that.
|
|
;
|
|
; Must set an error code: YES
|
|
;
|
|
|
|
INIT:
|
|
; Done, reset the error code
|
|
lda #TGI_ERR_OK
|
|
sta ERROR
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; DONE: Will be called to switch the graphics device back into text mode.
|
|
; The graphics kernel will never call DONE when no graphics mode is active,
|
|
; so there is no need to protect against that.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
DONE:
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; GETERROR: Return the error code in A and clear it.
|
|
|
|
GETERROR:
|
|
ldx #TGI_ERR_OK
|
|
lda ERROR
|
|
stx ERROR
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; CONTROL: Platform/driver specific entry point.
|
|
;
|
|
; Must set an error code: YES
|
|
;
|
|
; The TGI lacks a way to draw sprites. As that functionality is vital to
|
|
; Lynx games we borrow this CONTROL function to implement the still
|
|
; missing tgi_draw_sprite funtion. To use this in your C-program
|
|
; do a #define tgi_draw_sprite(spr) tgi_ioctl(0, spr)
|
|
;
|
|
; To do a flip-screen call tgi_ioctl(1, 0)
|
|
;
|
|
; To set the background index for text outputs call tgi_ioctl(2, bgindex)
|
|
|
|
CONTROL:
|
|
cmp #2
|
|
bne @L0
|
|
lda ptr1
|
|
sta BGINDEX
|
|
lda #TGI_ERR_OK
|
|
sta ERROR
|
|
rts
|
|
@L0:
|
|
cmp #1
|
|
bne @L2
|
|
lda __sprsys
|
|
eor #8
|
|
sta __sprsys
|
|
sta SPRSYS
|
|
|
|
lda __viddma
|
|
eor #2
|
|
sta __viddma
|
|
sta DISPCTL
|
|
ldy VIEWPAGEL
|
|
ldx VIEWPAGEH
|
|
and #2
|
|
beq @L1
|
|
clc
|
|
tya
|
|
adc #<8159
|
|
tay
|
|
txa
|
|
adc #>8159
|
|
tax
|
|
@L1:
|
|
sty DISPADRL
|
|
stx DISPADRH
|
|
lda #TGI_ERR_OK
|
|
sta ERROR
|
|
rts
|
|
@L2:
|
|
lda ptr1 ; Get the sprite address
|
|
ldx ptr1+1
|
|
|
|
draw_sprite: ; Draw it in render buffer
|
|
sta SCBNEXTL
|
|
stx SCBNEXTH
|
|
lda DRAWPAGEL
|
|
ldx DRAWPAGEH
|
|
sta VIDBASL
|
|
stx VIDBASH
|
|
lda #1
|
|
sta SPRGO
|
|
stz SDONEACK
|
|
@L3: stz CPUSLEEP
|
|
lda SPRSYS
|
|
lsr
|
|
bcs @L3
|
|
stz SDONEACK
|
|
lda #TGI_ERR_OK
|
|
sta ERROR
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; CLEAR: Clears the screen.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
.rodata
|
|
pixel_bitmap:
|
|
.byte 3,%10000100,%00000000, $0 ; A pixel bitmap
|
|
cls_sprite:
|
|
.byte %00000001 ; A pixel sprite
|
|
.byte %00010000
|
|
.byte %00100000
|
|
.addr 0,pixel_bitmap
|
|
.word 0
|
|
.word 0
|
|
.word $a000 ; 160
|
|
.word $6600 ; 102
|
|
.byte $00
|
|
|
|
.code
|
|
CLEAR: lda #<cls_sprite
|
|
ldx #>cls_sprite
|
|
bra draw_sprite
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETVIEWPAGE: Set the visible page. Called with the new page in A (0..n).
|
|
; The page number is already checked to be valid by the graphics kernel.
|
|
;
|
|
; Must set an error code: NO (will only be called if page ok)
|
|
;
|
|
; It is a good idea to call this function during the vertical blanking
|
|
; period. If you call it in the middle of the screen update then half of
|
|
; the drawn frame will be from the old buffer and the other half is
|
|
; from the new buffer. This is usually noticed by the user.
|
|
|
|
SETVIEWPAGE:
|
|
cmp #1
|
|
beq @L1 ; page == maxpages-1
|
|
ldy #<$de20 ; page 0
|
|
ldx #>$de20
|
|
bra @L2
|
|
@L1:
|
|
ldy #<$be40 ; page 1
|
|
ldx #>$be40
|
|
@L2:
|
|
sty VIEWPAGEL ; Save viewpage for getpixel
|
|
stx VIEWPAGEH
|
|
|
|
lda __viddma ; Process flipped displays
|
|
and #2
|
|
beq @L3
|
|
clc
|
|
tya
|
|
adc #<8159
|
|
tay
|
|
txa
|
|
adc #>8159
|
|
tax
|
|
@L3:
|
|
sty DISPADRL ; $FD94
|
|
stx DISPADRH ; $FD95
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETDRAWPAGE: Set the drawable page. Called with the new page in A (0..n).
|
|
; The page number is already checked to be valid by the graphics kernel.
|
|
;
|
|
; Must set an error code: NO (will only be called if page ok)
|
|
;
|
|
|
|
SETDRAWPAGE:
|
|
cmp #1
|
|
beq @L1 ; page == maxpages-1
|
|
lda #<$de20 ; page 0
|
|
ldx #>$de20
|
|
bra @L2
|
|
@L1:
|
|
lda #<$be40 ; page 1
|
|
ldx #>$be40
|
|
@L2:
|
|
sta DRAWPAGEL
|
|
stx DRAWPAGEH
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETCOLOR: Set the drawing color (in A). The new color is already checked
|
|
; to be in a valid range (0..maxcolor-1).
|
|
;
|
|
; Must set an error code: NO (will only be called if color ok)
|
|
;
|
|
|
|
SETCOLOR:
|
|
sta DRAWINDEX
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETPALETTE: Set the palette (not available with all drivers/hardware).
|
|
; A pointer to the palette is passed in ptr1. Must set an error if palettes
|
|
; are not supported
|
|
;
|
|
; Must set an error code: YES
|
|
;
|
|
|
|
SETPALETTE:
|
|
ldy #31
|
|
@L1: lda (ptr1),y
|
|
sta GCOLMAP,y ; $FDA0
|
|
dey
|
|
bpl @L1
|
|
|
|
; Done, reset the error code
|
|
|
|
lda #TGI_ERR_OK
|
|
sta ERROR
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; GETPALETTE: Return the current palette in A/X. Even drivers that cannot
|
|
; set the palette should return the default palette here, so there's no
|
|
; way for this function to fail.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
GETPALETTE:
|
|
lda #<GCOLMAP ; $FDA0
|
|
ldx #>GCOLMAP
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; GETDEFPALETTE: Return the default palette for the driver in A/X. All
|
|
; drivers should return something reasonable here, even drivers that don't
|
|
; support palettes, otherwise the caller has no way to determine the colors
|
|
; of the (not changeable) palette.
|
|
;
|
|
; Must set an error code: NO (all drivers must have a default palette)
|
|
;
|
|
|
|
GETDEFPALETTE:
|
|
lda #<DEFPALETTE
|
|
ldx #>DEFPALETTE
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETPIXEL: Draw one pixel at X1/Y1 = ptr1/ptr2 with the current drawing
|
|
; color. The coordinates passed to this function are never outside the
|
|
; visible screen area, so there is no need for clipping inside this function.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
.data
|
|
pixel_sprite:
|
|
.byte %00000001 ; A pixel sprite
|
|
.byte %00010000
|
|
.byte %00100000
|
|
.addr 0,pixel_bitmap
|
|
pix_x: .word 0
|
|
pix_y: .word 0
|
|
.word $100
|
|
.word $100
|
|
pix_c: .byte $00
|
|
|
|
.code
|
|
SETPIXEL:
|
|
lda X1
|
|
sta pix_x
|
|
lda Y1
|
|
sta pix_y
|
|
lda DRAWINDEX
|
|
sta pix_c
|
|
lda #<pixel_sprite
|
|
ldx #>pixel_sprite
|
|
jmp draw_sprite
|
|
|
|
; ------------------------------------------------------------------------
|
|
; GETPIXEL: Read the color value of a pixel and return it in A/X. The
|
|
; coordinates passed to this function are never outside the visible screen
|
|
; area, so there is no need for clipping inside this function.
|
|
|
|
|
|
GETPIXEL:
|
|
lda Y1
|
|
sta MATHD ; Hardware multiply
|
|
stz MATHC
|
|
lda #80
|
|
sta MATHB
|
|
stz MATHA
|
|
lda X1
|
|
lsr A
|
|
php
|
|
tay
|
|
|
|
clc
|
|
lda VIEWPAGEL
|
|
adc MATHH
|
|
sta ptr1
|
|
lda VIEWPAGEH
|
|
adc MATHG
|
|
sta ptr1+1
|
|
|
|
ldx #0
|
|
lda #15
|
|
sta MAPCTL
|
|
lda (ptr1),y
|
|
tay
|
|
lda #$0c
|
|
sta MAPCTL
|
|
tya
|
|
plp
|
|
bcc @L1
|
|
and #$f
|
|
rts
|
|
|
|
@L1: lsr A
|
|
lsr A
|
|
lsr A
|
|
lsr A
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; LINE: Draw a line from X1/Y1 to X2/Y2, where X1/Y1 = ptr1/ptr2 and
|
|
; X2/Y2 = ptr3/ptr4 using the current drawing color.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
.data
|
|
line_sprite:
|
|
.byte 0 ; Will be replaced by the code
|
|
.byte %00110000
|
|
.byte %00100000
|
|
.word 0,pixel_bitmap
|
|
line_x:
|
|
.word 0
|
|
line_y:
|
|
.word 0
|
|
line_sx:
|
|
.word $100
|
|
line_sy:
|
|
.word $100
|
|
.word 0
|
|
line_tilt:
|
|
.word 0
|
|
line_c:
|
|
.byte $e
|
|
|
|
.code
|
|
LINE:
|
|
lda DRAWINDEX
|
|
sta line_c
|
|
stz line_sx
|
|
stz line_sy
|
|
|
|
sec
|
|
lda X2
|
|
sbc X1
|
|
lda X2+1
|
|
sbc X1+1
|
|
bpl @L1
|
|
lda X1
|
|
ldx X2
|
|
sta X2
|
|
stx X1
|
|
lda X1+1
|
|
ldx X2+1
|
|
sta X2+1
|
|
stx X1+1
|
|
lda Y1
|
|
ldx Y2
|
|
sta Y2
|
|
stx Y1
|
|
lda Y1+1
|
|
ldx Y2+1
|
|
sta Y2+1
|
|
stx Y1+1
|
|
@L1:
|
|
lda #%00000000 ; Not flipped
|
|
sta line_sprite
|
|
|
|
sec
|
|
lda Y2
|
|
sbc Y1
|
|
sta Y2
|
|
lda Y2+1
|
|
sbc Y1+1
|
|
sta Y2+1
|
|
bpl @L2
|
|
sec
|
|
lda #0
|
|
sbc Y2
|
|
sta Y2
|
|
lda #0
|
|
sbc Y2+1
|
|
sta Y2+1
|
|
lda #%00010000 ; Vertical flip
|
|
sta line_sprite
|
|
@L2:
|
|
lda X1
|
|
sta line_x
|
|
lda X1+1
|
|
sta line_x+1
|
|
lda Y1
|
|
sta line_y
|
|
lda Y1+1
|
|
sta line_y+1
|
|
|
|
lda Y2
|
|
ina
|
|
sta line_sy+1
|
|
sta MATHP ; hardware divide
|
|
stz MATHN
|
|
|
|
stz MATHH
|
|
stz MATHG
|
|
sec
|
|
lda X2
|
|
sbc X1
|
|
ina
|
|
sta MATHF
|
|
stz MATHE
|
|
@L3:
|
|
lda SPRSYS
|
|
bmi @L3 ; wait for math done (bit 7 of sprsys)
|
|
lda MATHC
|
|
sta line_tilt
|
|
lda MATHB
|
|
sta line_tilt+1
|
|
bne @L4
|
|
lda #1
|
|
sta line_sx+1
|
|
bra @L6
|
|
@L4:
|
|
bit line_tilt
|
|
bpl @L5
|
|
ina
|
|
@L5:
|
|
sta line_sx+1
|
|
@L6:
|
|
lda #<line_sprite
|
|
ldx #>line_sprite
|
|
jmp draw_sprite
|
|
|
|
; ------------------------------------------------------------------------
|
|
; BAR: Draw a filled rectangle with the corners X1/Y1, X2/Y2, where
|
|
; X1/Y1 = ptr1/ptr2 and X2/Y2 = ptr3/ptr4 using the current drawing color.
|
|
; Contrary to most other functions, the graphics kernel will sort and clip
|
|
; the coordinates before calling the driver, so on entry the following
|
|
; conditions are valid:
|
|
; X1 <= X2
|
|
; Y1 <= Y2
|
|
; (X1 >= 0) && (X1 < XRES)
|
|
; (X2 >= 0) && (X2 < XRES)
|
|
; (Y1 >= 0) && (Y1 < YRES)
|
|
; (Y2 >= 0) && (Y2 < YRES)
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
.data
|
|
bar_sprite:
|
|
.byte %00000001 ; A pixel sprite
|
|
.byte %00010000
|
|
.byte %00100000
|
|
.addr 0,pixel_bitmap
|
|
bar_x: .word 0
|
|
bar_y: .word 0
|
|
bar_sx: .word $0100
|
|
bar_sy: .word $0100
|
|
bar_c: .byte $00
|
|
|
|
.code
|
|
BAR: lda X1
|
|
sta bar_x
|
|
lda Y1
|
|
sta bar_y
|
|
lda X2
|
|
sec
|
|
sbc X1
|
|
ina
|
|
sta bar_sx+1
|
|
lda Y2
|
|
sec
|
|
sbc Y1
|
|
ina
|
|
sta bar_sy+1
|
|
lda DRAWINDEX
|
|
sta bar_c
|
|
lda #<bar_sprite
|
|
ldx #>bar_sprite
|
|
jmp draw_sprite
|
|
|
|
; ------------------------------------------------------------------------
|
|
; CIRCLE: Draw a circle around the center X1/Y1 (= ptr1/ptr2) with the
|
|
; radius in tmp1 and the current drawing color.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
; There is no sensible way of drawing a circle on a Lynx. As I would
|
|
; have to use line elements to do the circle I rather do it in C than
|
|
; create it here in the driver.
|
|
|
|
; To do a circle please add this to your C program
|
|
|
|
;int sintbl[9] = {
|
|
; 0, // 0 degrees
|
|
; 3196, // 11.25 degrees
|
|
; 6270, // 22.5 degrees
|
|
; 9102, // 33.75 degrees
|
|
; 11585, // 45 degrees
|
|
; 13623, // 56.25 degrees
|
|
; 15137, // 67.5 degrees
|
|
; 16069, // 78.75 degrees
|
|
; 16384 // 90 degrees
|
|
;};
|
|
|
|
;int sin(char d)
|
|
;{
|
|
; char neg;
|
|
; d = d & 31;
|
|
; neg = d > 16;
|
|
; d = d & 15;
|
|
; if (d > 8)
|
|
; d = 16 - d;
|
|
; if (neg)
|
|
; return -sintbl[d];
|
|
; else
|
|
; return sintbl[d];
|
|
;}
|
|
|
|
;void tgi_Circle(int x0, int y0, unsigned char r)
|
|
;{
|
|
; char i;
|
|
; int x1, y1, x2, y2;
|
|
;
|
|
; x1 = ((long)sin(0) * r + 8192) / 16384 + x0;
|
|
; y1 = ((long)sin(8) * r + 8192) / 16384 + y0;
|
|
; for (i = 1; i <= 32; i++) {
|
|
; x2 = ((long)sin(i) * r + 8192) / 16384 + x0;
|
|
; y2 = ((long)sin(i+8) * r + 8192) / 16384 + y0;
|
|
; tgi_line(x1, y1, x2, y2);
|
|
; x1 = x2;
|
|
; y1 = y2;
|
|
; }
|
|
;}
|
|
|
|
;#define tgi_circle tgi_Circle
|
|
|
|
CIRCLE:
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; TEXTSTYLE: Set the style used when calling OUTTEXT. Text scaling in X and Y
|
|
; direction is passend in X/Y, the text direction is passed in A.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
TEXTSTYLE:
|
|
stx TEXTMAGX
|
|
sty TEXTMAGY
|
|
sta TEXTDIR
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; OUTTEXT: Output text at X/Y = ptr1/ptr2 using the current color and the
|
|
; current text style. The text to output is given as a zero terminated
|
|
; string with address in ptr3.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
OUTTEXT:
|
|
lda TEXTMAGX ; Scale sprite
|
|
sta text_sx+1
|
|
lda TEXTMAGY
|
|
sta text_sy+1
|
|
|
|
stz text_sprite ; Set normal sprite
|
|
lda BGINDEX
|
|
bne @L1
|
|
lda #4
|
|
sta text_sprite ; Set opaque sprite
|
|
@L1:
|
|
lda DRAWINDEX ; Set color
|
|
asl
|
|
asl
|
|
asl
|
|
asl
|
|
ora BGINDEX
|
|
sta text_c
|
|
|
|
lda X1 ; Set start position
|
|
sta text_x
|
|
lda X1+1
|
|
sta text_x+1
|
|
lda Y1
|
|
sta text_y
|
|
lda Y1+1
|
|
sta text_y+1
|
|
|
|
ldy #-1 ; Calculate string length
|
|
@L2:
|
|
iny
|
|
lda (STRPTR),y
|
|
bne @L2
|
|
cpy #20
|
|
bmi @L3
|
|
ldy #20
|
|
@L3:
|
|
sty STRLEN
|
|
bne @L4
|
|
rts ; Zero length string
|
|
@L4:
|
|
iny ; Prepare text_bitmap
|
|
iny
|
|
sty STROFF
|
|
|
|
ldy #8-1 ; 8 pixel lines per character
|
|
ldx #0
|
|
clc
|
|
@L5:
|
|
lda STROFF
|
|
sta text_bitmap,x
|
|
txa
|
|
adc STROFF
|
|
tax
|
|
lda #$ff
|
|
sta text_bitmap-1,x
|
|
dey
|
|
bpl @L5
|
|
stz text_bitmap,x
|
|
|
|
stz tmp2
|
|
iny
|
|
@L6:
|
|
lda (STRPTR),y
|
|
sty tmp1
|
|
|
|
sec ; (ch-' ') * 8
|
|
sbc #32
|
|
stz FONTOFF
|
|
stz FONTOFF+1
|
|
asl
|
|
asl
|
|
rol FONTOFF+1
|
|
asl
|
|
rol FONTOFF+1
|
|
clc ; Choose font
|
|
adc #<font
|
|
sta FONTOFF
|
|
lda FONTOFF+1
|
|
adc #>font
|
|
sta FONTOFF+1
|
|
|
|
; and now copy the 8 bytes of that char
|
|
|
|
ldx tmp2
|
|
inx
|
|
stx tmp2
|
|
|
|
; draw char from top to bottom, reading char-data from offset 8-1 to offset 0
|
|
ldy #8-1
|
|
@L7:
|
|
lda (FONTOFF),y ; *chptr
|
|
sta text_bitmap,x ;textbuf[y*(1+len+1)+1+x]
|
|
|
|
txa
|
|
adc STROFF
|
|
tax
|
|
|
|
dey
|
|
bpl @L7
|
|
|
|
; goto next char
|
|
ldy tmp1
|
|
iny
|
|
dec STRLEN
|
|
bne @L6
|
|
|
|
lda #<text_sprite
|
|
ldx #>text_sprite
|
|
jmp draw_sprite
|
|
|
|
.data
|
|
text_sprite:
|
|
.byte $00,$90,$20
|
|
.addr 0, text_bitmap
|
|
text_x:
|
|
.word 0
|
|
text_y:
|
|
.word 0
|
|
text_sx:
|
|
.word $100
|
|
text_sy:
|
|
.word $100
|
|
text_c:
|
|
.byte 0
|
|
|
|
.rodata
|
|
; The Font
|
|
; 96 characters from ASCII 32 to 127
|
|
; 8 pixels wide, 8 pixels high
|
|
; bit value 0 = foreground, bit value 1 = background / transparent
|
|
font:
|
|
; VERSAIL
|
|
.byte $FF, $FF, $FF, $FF, $FF, $FF, $FF, $FF ;32
|
|
.byte $FF, $E7, $FF, $FF, $E7, $E7, $E7, $E7 ;33
|
|
.byte $FF, $FF, $FF, $FF, $FF, $99, $99, $99 ;34
|
|
.byte $FF, $99, $99, $00, $99, $00, $99, $99 ;35
|
|
.byte $FF, $E7, $83, $F9, $C3, $9F, $C1, $E7 ;36
|
|
.byte $FF, $B9, $99, $CF, $E7, $F3, $99, $9D ;37
|
|
.byte $FF, $C0, $99, $98, $C7, $C3, $99, $C3 ;38
|
|
.byte $FF, $FF, $FF, $FF, $FF, $E7, $F3, $F9 ;39
|
|
.byte $FF, $F3, $E7, $CF, $CF, $CF, $E7, $F3 ;40
|
|
.byte $FF, $CF, $E7, $F3, $F3, $F3, $E7, $CF ;41
|
|
.byte $FF, $FF, $99, $C3, $00, $C3, $99, $FF ;42
|
|
.byte $FF, $FF, $E7, $E7, $81, $E7, $E7, $FF ;43
|
|
.byte $CF, $E7, $E7, $FF, $FF, $FF, $FF, $FF ;44
|
|
.byte $FF, $FF, $FF, $FF, $81, $FF, $FF, $FF ;45
|
|
.byte $FF, $E7, $E7, $FF, $FF, $FF, $FF, $FF ;46
|
|
.byte $FF, $9F, $CF, $E7, $F3, $F9, $FC, $FF ;47
|
|
.byte $FF, $C3, $99, $99, $89, $91, $99, $C3 ;48
|
|
.byte $FF, $81, $E7, $E7, $E7, $C7, $E7, $E7 ;49
|
|
.byte $FF, $81, $9F, $CF, $F3, $F9, $99, $C3 ;50
|
|
.byte $FF, $C3, $99, $F9, $E3, $F9, $99, $C3 ;51
|
|
.byte $FF, $F9, $F9, $80, $99, $E1, $F1, $F9 ;52
|
|
.byte $FF, $C3, $99, $F9, $F9, $83, $9F, $81 ;53
|
|
.byte $FF, $C3, $99, $99, $83, $9F, $99, $C3 ;54
|
|
.byte $FF, $E7, $E7, $E7, $E7, $F3, $99, $81 ;55
|
|
.byte $FF, $C3, $99, $99, $C3, $99, $99, $C3 ;56
|
|
.byte $FF, $C3, $99, $F9, $C1, $99, $99, $C3 ;57
|
|
.byte $FF, $FF, $E7, $FF, $FF, $E7, $FF, $FF ;58
|
|
.byte $CF, $E7, $E7, $FF, $FF, $E7, $FF, $FF ;59
|
|
.byte $FF, $F1, $E7, $CF, $9F, $CF, $E7, $F1 ;60
|
|
.byte $FF, $FF, $FF, $81, $FF, $81, $FF, $FF ;61
|
|
.byte $FF, $8F, $E7, $F3, $F9, $F3, $E7, $8F ;62
|
|
.byte $FF, $E7, $FF, $E7, $F3, $F9, $99, $C3 ;63
|
|
|
|
|
|
.byte $FF, $C3, $9D, $9F, $91, $91, $99, $C3 ;0
|
|
.byte $FF, $99, $99, $99, $81, $99, $C3, $E7 ;1
|
|
.byte $FF, $83, $99, $99, $83, $99, $99, $83 ;2
|
|
.byte $FF, $C3, $99, $9F, $9F, $9F, $99, $C3 ;3
|
|
.byte $FF, $87, $93, $99, $99, $99, $93, $87 ;4
|
|
.byte $FF, $81, $9F, $9F, $87, $9F, $9F, $81 ;5
|
|
.byte $FF, $9F, $9F, $9F, $87, $9F, $9F, $81 ;6
|
|
.byte $FF, $C3, $99, $99, $91, $9F, $99, $C3 ;7
|
|
.byte $FF, $99, $99, $99, $81, $99, $99, $99 ;8
|
|
.byte $FF, $C3, $E7, $E7, $E7, $E7, $E7, $C3 ;9
|
|
.byte $FF, $C7, $93, $F3, $F3, $F3, $F3, $E1 ;10
|
|
.byte $FF, $99, $93, $87, $8F, $87, $93, $99 ;11
|
|
.byte $FF, $81, $9F, $9F, $9F, $9F, $9F, $9F ;12
|
|
.byte $FF, $9C, $9C, $9C, $94, $80, $88, $9C ;13
|
|
.byte $FF, $99, $99, $91, $81, $81, $89, $99 ;14
|
|
.byte $FF, $C3, $99, $99, $99, $99, $99, $C3 ;15
|
|
.byte $FF, $9F, $9F, $9F, $83, $99, $99, $83 ;16
|
|
.byte $FF, $F1, $C3, $99, $99, $99, $99, $C3 ;17
|
|
.byte $FF, $99, $93, $87, $83, $99, $99, $83 ;18
|
|
.byte $FF, $C3, $99, $F9, $C3, $9F, $99, $C3 ;19
|
|
.byte $FF, $E7, $E7, $E7, $E7, $E7, $E7, $81 ;20
|
|
.byte $FF, $C3, $99, $99, $99, $99, $99, $99 ;21
|
|
.byte $FF, $E7, $C3, $99, $99, $99, $99, $99 ;22
|
|
.byte $FF, $9C, $88, $80, $94, $9C, $9C, $9C ;23
|
|
.byte $FF, $99, $99, $C3, $E7, $C3, $99, $99 ;24
|
|
.byte $FF, $E7, $E7, $E7, $C3, $99, $99, $99 ;25
|
|
.byte $FF, $81, $9F, $CF, $E7, $F3, $F9, $81 ;26
|
|
.byte $FF, $C3, $CF, $CF, $CF, $CF, $CF, $C3 ;27
|
|
.byte $FF, $03, $9D, $CF, $83, $CF, $ED, $F3 ;28
|
|
.byte $FF, $C3, $F3, $F3, $F3, $F3, $F3, $C3 ;29
|
|
.byte $E7, $E7, $E7, $E7, $81, $C3, $E7, $FF ;30
|
|
.byte $FF, $EF, $CF, $80, $80, $CF, $EF, $FF ;31
|
|
|
|
|
|
; gemena
|
|
.byte $FF, $C3, $9D, $9F, $91, $91, $99, $C3 ;224
|
|
.byte $FF, $C1, $99, $C1, $F9, $C3, $FF, $FF ;225
|
|
.byte $FF, $83, $99, $99, $83, $9F, $9F, $FF ;226
|
|
.byte $FF, $C3, $9F, $9F, $9F, $C3, $FF, $FF ;227
|
|
.byte $FF, $C1, $99, $99, $C1, $F9, $F9, $FF ;228
|
|
.byte $FF, $C3, $9F, $81, $99, $C3, $FF, $FF ;229
|
|
.byte $FF, $E7, $E7, $E7, $C1, $E7, $F1, $FF ;230
|
|
.byte $83, $F9, $C1, $99, $99, $C1, $FF, $FF ;231
|
|
.byte $FF, $99, $99, $99, $83, $9F, $9F, $FF ;232
|
|
.byte $FF, $C3, $E7, $E7, $C7, $FF, $E7, $FF ;233
|
|
.byte $C3, $F9, $F9, $F9, $F9, $FF, $F9, $FF ;234
|
|
.byte $FF, $99, $93, $87, $93, $9F, $9F, $FF ;235
|
|
.byte $FF, $C3, $E7, $E7, $E7, $E7, $C7, $FF ;236
|
|
.byte $FF, $9C, $94, $80, $80, $99, $FF, $FF ;237
|
|
.byte $FF, $99, $99, $99, $99, $83, $FF, $FF ;238
|
|
.byte $FF, $C3, $99, $99, $99, $C3, $FF, $FF ;239
|
|
.byte $9F, $9F, $83, $99, $99, $83, $FF, $FF ;240
|
|
.byte $F9, $F9, $C1, $99, $99, $C1, $FF, $FF ;241
|
|
.byte $FF, $9F, $9F, $9F, $99, $83, $FF, $FF ;242
|
|
.byte $FF, $83, $F9, $C3, $9F, $C1, $FF, $FF ;243
|
|
.byte $FF, $F1, $E7, $E7, $E7, $81, $E7, $FF ;244
|
|
.byte $FF, $C1, $99, $99, $99, $99, $FF, $FF ;245
|
|
.byte $FF, $E7, $C3, $99, $99, $99, $FF, $FF ;246
|
|
.byte $FF, $C9, $C1, $80, $94, $9C, $FF, $FF ;247
|
|
.byte $FF, $99, $C3, $E7, $C3, $99, $FF, $FF ;248
|
|
.byte $87, $F3, $C1, $99, $99, $99, $FF, $FF ;249
|
|
.byte $FF, $81, $CF, $E7, $F3, $81, $FF, $FF ;250
|
|
.byte $FF, $C3, $CF, $CF, $CF, $CF, $CF, $C3 ;251
|
|
.byte $FF, $03, $9D, $CF, $83, $CF, $ED, $F3 ;252
|
|
.byte $FF, $C3, $F3, $F3, $F3, $F3, $F3, $C3 ;253
|
|
.byte $E7, $E7, $E7, $E7, $81, $C3, $E7, $FF ;254
|
|
.byte $FF, $EF, $CF, $80, $80, $CF, $EF, $FF ;255
|