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106 lines
2.8 KiB
ArmAsm
106 lines
2.8 KiB
ArmAsm
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; Oliver Schmidt, 10.03.2004
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;
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; void __fastcall__ _textframexy (unsigned char x, unsigned char y,
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; unsigned char width, unsigned char height,
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; unsigned char style);
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; void __fastcall__ _textframe (unsigned char width, unsigned char height);
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; unsigned char style);
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;
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.export __textframexy, __textframe
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.import popa, pusha, _gotoxy
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.import chlinedirect, cvlinedirect
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.include "zeropage.inc"
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.include "apple2.inc"
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WIDTH = tmp2
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HEIGHT = tmp3
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XORIGIN = tmp4
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YORIGIN = ptr1
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__textframexy:
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sec
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bra :+
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__textframe:
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clc
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: ldx INVFLG
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phx ; Save character display mode
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ldx #$FF
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stx INVFLG ; Set normal character display mode
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pha ; Save index
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jsr popa ; Get height
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sta HEIGHT
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jsr popa ; Get width
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sta WIDTH
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lda CH
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ldx CV
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bcc noxy
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jsr popa ; Get y
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tax
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jsr popa ; Get x
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noxy: sta XORIGIN
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stx YORIGIN
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plx ; Restore index
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loop: lda XOFFS,x
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clc
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bpl :+ ; Relative to left edge?
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adc WIDTH
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: adc XORIGIN
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jsr pusha
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lda YOFFS,x
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clc
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bpl :+ ; Relative to top?
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adc HEIGHT
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: adc YORIGIN
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jsr _gotoxy ; Call this one, will pop params
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txa
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tay
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lsr ; Get bit 0 (vline) into carry
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lda LENGTH,x
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phx ; Save index
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ldx CHAR,y
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bcc hline
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clc
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adc HEIGHT
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jsr cvlinedirect
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bra next
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hline: adc WIDTH
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jsr chlinedirect
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next: plx ; Restore index
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inx
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txa
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and #$03 ; Mask style
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bne loop
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pla
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sta INVFLG ; Restore character display mode
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rts
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.rodata
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; 2 styles with 4 lines each make up 8 entries per table
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; - even entry numbers mean horizontal lines
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; - odd entry numbers mean vertical lines
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; x offset for the line starting point
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; - a positive value means relative to the frame left edge
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; - a negative value menas relative to the frame right edge
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XOFFS: .byte 0, 0, 0, -2, 1, 0, 1, -2
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; y offset for the line starting point
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; - a positive value means relative to the frame top
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; - a negative value menas relative to the frame bottom
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YOFFS: .byte 0, 1, -2, 1, 0, 0, -2, 0
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; length of the line relative to the frame size
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; - a negative value for hlines means shorter than the width
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; - a negative value for vlines menas shorter than the height
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LENGTH: .byte 0, -2, 0, -2, -2, 0, -2, 0
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; character to use for drawing the line
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; - hibit set means normal printable character
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; - hibit clear means MouseText character
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CHAR: .byte '_'|$80, '_', 'L', 'Z', 'L', 'Z', '_'|$80, '_'
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