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149 lines
3.6 KiB
ArmAsm
149 lines
3.6 KiB
ArmAsm
;
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; Ullrich von Bassewitz, 21.06.2002
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;
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; void __fastcall__ tgi_outtext (const char* s);
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; /* Output text at the current graphics cursor position. */
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.include "tgi-kernel.inc"
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.include "tgi-vectorfont.inc"
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.include "zeropage.inc"
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.import _toascii
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.import popax, negax
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;----------------------------------------------------------------------------
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; Data
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text := regbank
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font := regbank ; Same as text
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widths := regbank+2
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;----------------------------------------------------------------------------
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;
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.proc _tgi_outtext
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ldy _tgi_font ; Bit or vectorfont?
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bne VectorFont
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; Handle bitmapped font output
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sta ptr3
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stx ptr3+1 ; Pass s in ptr3 to driver
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pha
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txa
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pha ; Save s on stack for later
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jsr tgi_curtoxy ; Copy curx/cury into ptr1/ptr2
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jsr tgi_outtext ; Call the driver
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pla
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tax
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pla ; Restore s
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jsr _tgi_textwidth ; Get width of text string
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; Move the graphics cursor by the amount in a/x
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MoveCursor:
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ldy _tgi_textdir ; Horizontal or vertical text?
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beq @L1 ; Jump if horizontal
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; Move graphics cursor for vertical text
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jsr negax
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ldy #2 ; Point to _tgi_cury
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; Move graphics cursor for horizontal text
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@L1: clc
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adc _tgi_curx,y
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sta _tgi_curx,y
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txa
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adc _tgi_curx+1,y
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sta _tgi_curx+1,y
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Done: rts
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; Handle vector font output. First, check if we really have a registered
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; vector font. Bail out if this is not the case.
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VectorFont:
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tay
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lda _tgi_vectorfont ; Do we have a vector font?
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ora _tgi_vectorfont+1
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beq Done ; Bail out if not
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; Check if the font in the given size is partially out of the screen. We
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; do this in vertical direction here, and in horizontal direction before
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; outputting a character.
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; (todo)
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; Save zero page variable on stack and save
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lda text
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pha
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lda text+1
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pha
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lda widths
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pha
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lda widths+1
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pha
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sty text
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stx text+1 ; Store pointer to string
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lda _tgi_vectorfont
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clc
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adc #<(TGI_VECTORFONT::WIDTHS - TGI_VF_FIRSTCHAR)
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sta widths
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lda _tgi_vectorfont+1
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adc #>(TGI_VECTORFONT::WIDTHS - TGI_VF_FIRSTCHAR)
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sta widths+1
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; Output the text string
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@L1: ldy #0
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lda (text),y ; Get next character from string
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beq EndOfText
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jsr _toascii ; Convert to ascii
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pha ; Save char in A
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jsr _tgi_vectorchar ; Output it
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pla
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; Move the graphics cursor by the width of the char
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tay
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lda (widths),y ; Get width of this char
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sta ptr1
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lda #0
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sta ptr1+1
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lda _tgi_textscalew
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ldx _tgi_textscalew+1 ; Get scale factor
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jsr tgi_imulround ; Multiplcate and round
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jsr MoveCursor ; Move the graphics cursor
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; Next char in string
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inc text
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bne @L1
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inc text+1
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bne @L1
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; Done. Restore registers and return
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EndOfText:
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pla
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sta widths+1
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pla
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sta widths
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pla
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sta text+1
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pla
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sta text
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rts
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.endproc
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