mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 04:30:10 +00:00
386 lines
10 KiB
ArmAsm
386 lines
10 KiB
ArmAsm
;
|
|
; Graphics driver for the 228x200x3 palette mode on the Telestrat
|
|
;
|
|
; Jede (jede@oric.org), 2017-10-15
|
|
|
|
.include "zeropage.inc"
|
|
|
|
.include "tgi-kernel.inc"
|
|
.include "tgi-error.inc"
|
|
.include "telestrat.inc"
|
|
|
|
.macpack generic
|
|
.macpack module
|
|
|
|
XSIZE = 6 ; System font width
|
|
YSIZE = 8 ; System font height
|
|
|
|
; ------------------------------------------------------------------------
|
|
; Header. Includes jump table and constants.
|
|
|
|
module_header _telestrat_228_200_3_tgi
|
|
|
|
; The first part of the header is a structure that has a signature,
|
|
; and defines the capabilities of the driver.
|
|
|
|
.byte "tgi"
|
|
.byte TGI_API_VERSION ; TGI API version number
|
|
.addr $0000 ; Library reference
|
|
.word 228 ; x resolution
|
|
.word 200 ; y resolution
|
|
.byte 3 ; Number of drawing colors
|
|
.byte 1 ; Number of screens available
|
|
.byte XSIZE ; System font x size
|
|
.byte YSIZE ; System font y size
|
|
.word $011C ; Aspect ratio (based on 4/3 display)
|
|
.byte 0 ; TGI driver flags
|
|
|
|
; Next comes the jump table. Currently, all entries must be valid;
|
|
; and, may point to an RTS, for test versions (function not implemented).
|
|
|
|
.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
|
|
|
|
; ------------------------------------------------------------------------
|
|
; Data.
|
|
|
|
; Variables mapped to the zero-page segment variables. These are
|
|
; used for passing parameters to the driver.
|
|
|
|
X1 := ptr1
|
|
Y1 := ptr2
|
|
X2 := ptr3
|
|
Y2 := ptr4
|
|
|
|
; Absolute variables used in the code
|
|
|
|
.bss
|
|
|
|
ERROR: .res 1 ; Error code
|
|
MODE: .res 1 ; Graphics mode
|
|
PALETTE: .res 2
|
|
|
|
; Constant table
|
|
|
|
.rodata
|
|
|
|
; Default colors: black background, white foreground
|
|
; (The third "color" actually flips a pixel
|
|
; between the foreground and background colors.)
|
|
;
|
|
DEFPALETTE: .byte 0, 1
|
|
|
|
.code
|
|
|
|
; ------------------------------------------------------------------------
|
|
; 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 called only once. So, any code that is needed
|
|
; to initialize variables and so on must go here. Setting palette and
|
|
; clearing the screen are not needed because they are called by the graphics
|
|
; kernel later.
|
|
; The graphics kernel never will 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:
|
|
|
|
; Switch into graphics mode.
|
|
BRK_TELEMON(XHIRES)
|
|
|
|
; Done, reset the error code.
|
|
|
|
lda #TGI_ERR_OK
|
|
sta ERROR
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; GETERROR: Return the error code in A, and clear it.
|
|
|
|
GETERROR:
|
|
ldx #TGI_ERR_OK
|
|
lda ERROR
|
|
stx ERROR
|
|
rts
|
|
; ------------------------------------------------------------------------
|
|
; 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:
|
|
|
|
; ------------------------------------------------------------------------
|
|
; UNINSTALL routine. Is called before the driver is removed from memory. May
|
|
; clean up anything done by INSTALL, but probably is empty most of the time.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
UNINSTALL:
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; DONE: Will be called to switch the graphics device back into text mode.
|
|
; The graphics kernel never will call DONE when no graphics mode is active,
|
|
; so there is no need to protect against that.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
DONE:
|
|
BRK_TELEMON(XTEXT)
|
|
rts
|
|
; ------------------------------------------------------------------------
|
|
; CONTROL: Platform-/driver-specific entry point.
|
|
;
|
|
; Must set an error code: YES
|
|
;
|
|
|
|
CONTROL:
|
|
; not done yet
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; CLEAR: Clears the screen.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
CLEAR:
|
|
BRK_TELEMON(XEFFHI)
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETVIEWPAGE: Set the visible page. Called with the new page in A (0..n).
|
|
; The page number already is checked to be valid, by the graphics kernel.
|
|
;
|
|
; Must set an error code: NO (will be called only if page OK)
|
|
;
|
|
|
|
SETVIEWPAGE:
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETDRAWPAGE: Set the drawable page. Called with the new page in A (0..n).
|
|
; The page number already is checked to be valid, by the graphics kernel.
|
|
;
|
|
; Must set an error code: NO (will be called only if page OK)
|
|
;
|
|
|
|
SETDRAWPAGE:
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; SETCOLOR: Set the drawing color (in A). The new color already is checked
|
|
; to be in a valid range (0..maxcolor-1).
|
|
;
|
|
; Must set an error code: NO (will be called only if color OK)
|
|
;
|
|
|
|
SETCOLOR:
|
|
; not done yet
|
|
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:
|
|
; not done yet
|
|
rts
|
|
|
|
flipcolor:
|
|
; not done yet
|
|
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:
|
|
; not done yet
|
|
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 co-ordinates 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
|
|
;
|
|
|
|
SETPIXEL:
|
|
lda #$80
|
|
|
|
SETPIXELSETMODE:
|
|
sta HRSFB
|
|
lda X1
|
|
sta HRS1
|
|
lda Y1
|
|
sta HRS2
|
|
|
|
|
|
|
|
BRK_TELEMON(XCURSE)
|
|
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; GETPIXEL: Read the color value of a pixel, and return it in A/X. The
|
|
; co-ordinates passed to this function are never outside the visible screen
|
|
; area, so there is no need for clipping inside this function.
|
|
|
|
GETPIXEL:
|
|
; not done yet
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; LINE: Draw a line from X1/Y1 to X2/Y2, where X1/Y1 = ptr1/ptr2 and
|
|
; X2/Y2 = ptr3/ptr4, using the current drawing color.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
LINE:
|
|
; not done yet
|
|
lda X1
|
|
sta HRS1
|
|
lda Y1
|
|
sta HRS2
|
|
|
|
lda X2
|
|
sta HRS3
|
|
lda Y2
|
|
sta HRS4
|
|
|
|
lda X1+1
|
|
sta HRS1+1
|
|
|
|
lda Y1+1
|
|
sta HRS2+1
|
|
|
|
lda X2+1
|
|
sta HRS3+1
|
|
|
|
lda Y2+1
|
|
sta HRS4+1
|
|
|
|
lda #$FF
|
|
sta HRSPAT
|
|
|
|
BRK_TELEMON(XDRAWA)
|
|
rts
|
|
|
|
|
|
|
|
CIRCLE:
|
|
; not done yet
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; 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 co-ordinates 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
|
|
;
|
|
|
|
BAR:
|
|
; not done yet
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
; TEXTSTYLE: Set the style used when calling OUTTEXT. Text scaling in the x
|
|
; and y directions is passed in X/Y, the text direction is passed in A.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
TEXTSTYLE:
|
|
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 its address in ptr3.
|
|
;
|
|
; Must set an error code: NO
|
|
;
|
|
|
|
OUTTEXT:
|
|
; put hires cursor in X & Y
|
|
lda #$00
|
|
jsr SETPIXELSETMODE
|
|
|
|
|
|
; count the length of the string
|
|
ldy #$00
|
|
loop:
|
|
lda (ptr3),y
|
|
beq out
|
|
iny
|
|
bne loop
|
|
out:
|
|
; XSCHAR routine from telemon needs to have the length of the string in X register
|
|
; copy Y register to X register. It could be optimized in 65C02 with TYX
|
|
tya
|
|
tax
|
|
|
|
lda ptr3 ; XSCHAR needs in A and Y the address of the string
|
|
ldy ptr3+1
|
|
BRK_TELEMON(XSCHAR)
|
|
rts
|