mirror of
https://github.com/cc65/cc65.git
synced 2025-04-11 09:37:10 +00:00
Use correction values for the coordinates so that the x/y coordinates are
0/0 if the upper left corner of the mouse sprite is in the upper left corner of the screen. Use always sprite #0 for the mouse pointer. git-svn-id: svn://svn.cc65.org/cc65/trunk@892 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
parent
35f403b702
commit
20f23128cd
@ -12,33 +12,39 @@
|
||||
.export _mouse_buttons, _mouse_info
|
||||
|
||||
.import _readjoy
|
||||
.import popa, popsreg, addysp1
|
||||
.import popa, popax, addysp1
|
||||
.importzp ptr1, sp, sreg
|
||||
|
||||
.include "c64.inc"
|
||||
|
||||
.macpack generic
|
||||
|
||||
|
||||
.code
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; Constants
|
||||
;
|
||||
|
||||
SPRITE_HEIGHT = 21
|
||||
SPRITE_WIDTH = 24
|
||||
SCREEN_HEIGHT = 200
|
||||
SCREEN_WIDTH = 320
|
||||
XCORR = SPRITE_WIDTH
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; unsigned char __fastcall__ mouse_init (unsigned char port,
|
||||
; unsigned char sprite,
|
||||
; unsigned char type);
|
||||
;
|
||||
|
||||
_mouse_init:
|
||||
jsr popa ; Ignore the type, get sprite param
|
||||
tax ; Save sprite number
|
||||
jsr popa ; Get the port number
|
||||
jsr popa ; Ignore type and port
|
||||
|
||||
ldy OldIRQ+1 ; Already initialized?
|
||||
bne AlreadyInitialized ; Jump if yes
|
||||
|
||||
stx MouseSprite ; Remember the sprite number
|
||||
sta MousePort ; Remember the port number
|
||||
|
||||
; Initialize variables
|
||||
|
||||
ldx #0
|
||||
@ -49,18 +55,22 @@ _mouse_init:
|
||||
stx OldPotX
|
||||
stx OldPotY
|
||||
stx XMin
|
||||
stx XMin+1 ; XMin = 0
|
||||
lda #29
|
||||
stx XMin+1 ; XMin = 0
|
||||
lda #50 ; ## FIXME: This is the PAL value
|
||||
sta YCorr
|
||||
sec
|
||||
sbc #SPRITE_HEIGHT ; Sprite height in pixels
|
||||
sta YMin
|
||||
stx YMin+1 ; YMin = 29
|
||||
lda #250
|
||||
stx YMin+1 ; YMin = 29
|
||||
lda #SCREEN_HEIGHT ; Vertical screen res
|
||||
add YCorr ; Add correction factor
|
||||
sta YMax
|
||||
stx YMax+1 ; YMax = 250
|
||||
inx ; X = 1
|
||||
stx Invisible ; Mouse *not* visible
|
||||
lda #<344
|
||||
stx YMax+1
|
||||
inx ; X = 1
|
||||
stx Invisible ; Mouse *not* visible
|
||||
lda #<(SCREEN_WIDTH + SPRITE_WIDTH)
|
||||
sta XMax
|
||||
stx XMax+1 ; XMax = 344
|
||||
stx XMax+1 ; XMax = 320 + sprite width
|
||||
|
||||
; Remember the old IRQ vector
|
||||
|
||||
@ -107,11 +117,8 @@ Done: rts
|
||||
_mouse_hide:
|
||||
lda Invisible ; Get the flag
|
||||
bne @L1 ; Jump if already invisible
|
||||
ldx MouseSprite ; Sprite defined?
|
||||
beq @L1 ; Jump if no
|
||||
|
||||
lda NotMask-1,x ; Get clean mask
|
||||
|
||||
lda #$FE ; Clear bit for sprite #0
|
||||
sei ; Disable interrupts
|
||||
and VIC_SPR_ENA
|
||||
sta VIC_SPR_ENA ; Disable sprite
|
||||
@ -130,17 +137,12 @@ _mouse_show:
|
||||
beq @L1 ; Jump if no
|
||||
dec Invisible ; Set the flag
|
||||
bne @L1 ; Jump if still invisible
|
||||
ldx MouseSprite ; Sprite defined?
|
||||
beq @L1 ; Jump if no
|
||||
|
||||
sei ; Disable interrupts
|
||||
jsr MoveSprite1 ; Move the sprite to it's position
|
||||
|
||||
ldx MouseSprite ; Get sprite number (again)
|
||||
lda BitMask-1,x ; Get bit mask
|
||||
ora VIC_SPR_ENA
|
||||
sta VIC_SPR_ENA ; Enable sprite
|
||||
|
||||
lda VIC_SPR_ENA ; Get sprite enable register
|
||||
ora #$01 ; Enable sprite #0
|
||||
sta VIC_SPR_ENA ; Write back
|
||||
cli ; Enable interrupts
|
||||
|
||||
@L1: rts
|
||||
@ -153,32 +155,42 @@ _mouse_show:
|
||||
_mouse_box:
|
||||
ldy #0 ; Stack offset
|
||||
|
||||
sei ; Disable interrupts
|
||||
add YCorr ; Adjust the Y value
|
||||
bcc @L1
|
||||
inx
|
||||
clc
|
||||
@L1: sei ; Disable interrupts
|
||||
|
||||
sta YMax
|
||||
stx YMax+1 ; maxy
|
||||
stx YMax+1 ; maxy
|
||||
|
||||
lda (sp),y
|
||||
adc #XCORR
|
||||
sta XMax
|
||||
iny
|
||||
lda (sp),y
|
||||
sta XMax+1 ; maxx
|
||||
adc #$00
|
||||
sta XMax+1 ; maxx
|
||||
|
||||
iny
|
||||
lda (sp),y
|
||||
sta YMin
|
||||
add YCorr
|
||||
sta YMin
|
||||
iny
|
||||
lda (sp),y
|
||||
sta YMin+1 ; miny
|
||||
adc #$00
|
||||
sta YMin+1 ; miny
|
||||
|
||||
iny
|
||||
lda (sp),y
|
||||
sta XMin
|
||||
add #XCORR
|
||||
sta XMin
|
||||
iny
|
||||
lda (sp),y
|
||||
sta XMin+1 ; minx
|
||||
adc #$00
|
||||
sta XMin+1 ; minx
|
||||
|
||||
cli ; Enable interrupts
|
||||
cli ; Enable interrupts
|
||||
|
||||
jmp addysp1 ; Drop params, return
|
||||
|
||||
@ -192,25 +204,31 @@ _mouse_pos:
|
||||
sta ptr1
|
||||
stx ptr1+1 ; Remember the argument pointer
|
||||
|
||||
ldy #0 ; Structure offset
|
||||
|
||||
sei ; Disable interrupts
|
||||
ldy #0 ; Structure offset
|
||||
sec ; Needed for the SBC later
|
||||
|
||||
sei ; Disable interrupts
|
||||
lda XPos ; Transfer the position
|
||||
sbc #XCORR
|
||||
sta (ptr1),y
|
||||
lda XPos+1
|
||||
sbc #$00
|
||||
iny
|
||||
sta (ptr1),y
|
||||
lda YPos
|
||||
iny
|
||||
sta (ptr1),y
|
||||
lda YPos+1
|
||||
iny
|
||||
sta (ptr1),y
|
||||
ldx YPos+1
|
||||
cli ; Restore initial interrupt state
|
||||
|
||||
cli ; Restore initial interrupt state
|
||||
sub YCorr ; Apply the Y correction value
|
||||
bcs @L1
|
||||
dex
|
||||
@L1: iny
|
||||
sta (ptr1),y ; Store YPos
|
||||
txa
|
||||
iny
|
||||
sta (ptr1),y
|
||||
|
||||
rts ; Done
|
||||
rts ; Done
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
@ -229,9 +247,9 @@ _mouse_info:
|
||||
|
||||
; Fill in the button state
|
||||
|
||||
jsr _mouse_buttons ; Will not touch ptr1
|
||||
ldy #4
|
||||
sta (ptr1),y
|
||||
jsr _mouse_buttons ; Will not touch ptr1
|
||||
ldy #4
|
||||
sta (ptr1),y
|
||||
|
||||
rts
|
||||
|
||||
@ -241,29 +259,34 @@ _mouse_info:
|
||||
;
|
||||
|
||||
_mouse_move:
|
||||
jsr popsreg ; Get X
|
||||
sei ; Disable interrupts
|
||||
|
||||
add YCorr ; Add Y coordinate correction
|
||||
bcc @L1
|
||||
inx
|
||||
clc
|
||||
@L1: sei
|
||||
sta YPos
|
||||
stx YPos+1
|
||||
lda sreg
|
||||
ldx sreg+1
|
||||
sta XPos
|
||||
stx XPos+1 ; Set new position
|
||||
stx YPos+1
|
||||
cli
|
||||
|
||||
jsr MoveSprite ; Move the sprite to the mouse pos
|
||||
jsr popax ; Get X
|
||||
adc #XCORR ; Adjust X coordinate
|
||||
bcc @L2
|
||||
inx
|
||||
@L2: sei
|
||||
sta XPos
|
||||
stx XPos+1 ; Set new position
|
||||
jsr MoveSprite ; Move the sprite to the mouse pos
|
||||
cli ; Enable interrupts
|
||||
|
||||
@L9: cli ; Enable interrupts
|
||||
rts
|
||||
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; unsigned char mouse_buttons (void);
|
||||
;
|
||||
|
||||
_mouse_buttons:
|
||||
lda MousePort ; Get the port
|
||||
lda #$00 ; Use port #0
|
||||
jmp _readjoy ; Same as joystick
|
||||
|
||||
; --------------------------------------------------------------------------
|
||||
@ -386,41 +409,35 @@ MoveCheck:
|
||||
; --------------------------------------------------------------------------
|
||||
;
|
||||
; Move the mouse sprite to the current mouse position. Must be called
|
||||
; with interrupts off. MoveSprite1 is an entry without checking and
|
||||
; loading X
|
||||
; with interrupts off. MoveSprite1 is an entry without checking.
|
||||
;
|
||||
|
||||
MoveSprite:
|
||||
|
||||
lda Invisible ; Mouse visible?
|
||||
bne MoveSpriteDone ; Jump if no
|
||||
ldx MouseSprite ; Sprite defined?
|
||||
beq MoveSpriteDone ; Jump if no
|
||||
|
||||
; Set the high X bit
|
||||
|
||||
MoveSprite1:
|
||||
lda VIC_SPR_HI_X ; Get high X bits of all sprites
|
||||
and NotMask-1,x ; Mask out sprite bit
|
||||
and #$FE ; Clear bit for sprite #0
|
||||
ldy XPos+1 ; Test Y position
|
||||
beq @L1
|
||||
ora BitMask-1,x ; Set high X bit
|
||||
ora #$01 ; Set high X bit
|
||||
@L1: sta VIC_SPR_HI_X ; Set hi X sprite values
|
||||
|
||||
; Set the low X byte
|
||||
|
||||
txa
|
||||
asl a ; Index*2
|
||||
tax
|
||||
lda XPos
|
||||
sta VIC_SPR0_X-2,x ; Set low byte
|
||||
sta VIC_SPR0_X ; Set low byte
|
||||
|
||||
; Set the Y position
|
||||
|
||||
ldy YPos+1 ; Negative or too large?
|
||||
bne MoveSpriteDone ; Jump if yes
|
||||
lda YPos
|
||||
sta VIC_SPR0_Y-2,x ; Set Y position
|
||||
sta VIC_SPR0_Y ; Set Y position
|
||||
|
||||
; Done
|
||||
|
||||
@ -432,11 +449,10 @@ MoveSpriteDone:
|
||||
|
||||
.bss
|
||||
|
||||
OldIRQ: .res 2 ; Old IRQ vector
|
||||
MousePort: .res 1 ; Port used for the mouse
|
||||
MouseSprite: .res 1 ; Number of sprite to control
|
||||
OldIRQ: .res 2 ; Old IRQ vector
|
||||
OldValue: .res 1 ; Temp for MoveCheck routine
|
||||
NewValue: .res 1 ; Temp for MoveCheck routine
|
||||
YCorr: .res 1 ; Correction for Y coordinate
|
||||
|
||||
Invisible: .res 1 ; Is the mouse invisible?
|
||||
OldPotX: .res 1 ; Old hw counter values
|
||||
@ -450,12 +466,4 @@ YMin: .res 2 ; Y1 value of bounding box
|
||||
XMax: .res 2 ; X2 value of bounding box
|
||||
YMax: .res 2 ; Y2 value of bounding box
|
||||
|
||||
.data
|
||||
|
||||
BitMask: .byte $01, $02, $04, $08, $10, $20, $40, $80
|
||||
NotMask: .byte $FE, $FD, $FB, $F7, $EF, $DF, $BF, $7F
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user