From: uz Date: Tue, 10 Nov 2009 18:50:33 +0000 (+0000) Subject: Working on stroked font output. X-Git-Tag: V2.13.1~74 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=fe5adb5c4e5cf258b0410be79d532959ebca69fb;p=cc65 Working on stroked font output. git-svn-id: svn://svn.cc65.org/cc65/trunk@4455 b7a2c559-68d2-44c3-8de9-860c34a00d81 --- diff --git a/libsrc/tgi/tgi_outtext.s b/libsrc/tgi/tgi_outtext.s index b5cccca76..3f2f365fd 100644 --- a/libsrc/tgi/tgi_outtext.s +++ b/libsrc/tgi/tgi_outtext.s @@ -6,12 +6,27 @@ .include "tgi-kernel.inc" + .include "tgi-vectorfont.inc" + .include "zeropage.inc" .import popax, negax - .importzp ptr3 + + +;---------------------------------------------------------------------------- +; Data + +text := regbank + +;---------------------------------------------------------------------------- +; .proc _tgi_outtext + ldy _tgi_font ; Bit or vectorfont? + bne VectorFont + +; Handle bitmapped font output + sta ptr3 stx ptr3+1 ; Pass s in ptr3 to driver pha @@ -43,5 +58,41 @@ sta _tgi_curx+1,y rts +; Handle vector font output + +VectorFont: + tay + lda _tgi_vectorfont ; Do we have a vector font? + ora _tgi_vectorfont+1 + beq Done ; Bail out if not + + lda text ; Save zero page variable on stack + pha + lda text+1 + pha + + sty text + stx text+1 ; Store pointer to string + +; Output the text string + +@L1: ldy #0 + lda (text),y ; Get next character from string + beq EndOfText + jsr _tgi_vectorchar ; Output it + inc text + bne @L1 + inc text+1 + bne @L1 + +; Done. Restore registers and return + +EndOfText: + pla + sta text+1 + pla + sta text +Done: rts + .endproc diff --git a/libsrc/tgi/tgi_outtextxy.s b/libsrc/tgi/tgi_outtextxy.s index efc3e80d5..3934df871 100644 --- a/libsrc/tgi/tgi_outtextxy.s +++ b/libsrc/tgi/tgi_outtextxy.s @@ -7,16 +7,31 @@ .include "tgi-kernel.inc" - .import popax - .importzp ptr3 + .import addysp1 + .importzp sp .proc _tgi_outtextxy - sta ptr3 - stx ptr3+1 ; Save s - jsr popax ; get y from stack - jsr tgi_popxy ; Pop x/y into ptr1/ptr2 - jmp tgi_outtext ; Call the driver +; Get the X/Y parameters and store them into curx/cury. This enables us +; to use tgi_outtext for the actual output + + pha ; + ldy #0 + lda (sp),y + sta _tgi_cury + iny + lda (sp),y + sta _tgi_cury+1 + iny + lda (sp),y + sta _tgi_curx + iny + lda (sp),y + sta _tgi_curx+1 + pla + jsr addysp1 ; Drop arguments from stack + + jmp _tgi_outtext .endproc diff --git a/libsrc/tgi/tgi_vectorchar.s b/libsrc/tgi/tgi_vectorchar.s index b48378669..72a5b234b 100644 --- a/libsrc/tgi/tgi_vectorchar.s +++ b/libsrc/tgi/tgi_vectorchar.s @@ -12,7 +12,7 @@ .include "tgi-kernel.inc" .include "tgi-vectorfont.inc" .include "zeropage.inc" - + .macpack longbranch ;---------------------------------------------------------------------------- @@ -26,7 +26,99 @@ X1: .res 2 Y1: .res 2 X2: .res 2 Y2: .res 2 +BaseX: .res 2 +BaseY: .res 2 +Char: .res 1 + +;---------------------------------------------------------------------------- +; Get the next operation from the Ops pointer, remove the flag bit and sign +; extend the 8 bit value. On return, the flags are set for the value in A. + +.code +.proc GetOp + +; Load delta value + + ldy #0 + lda (Ops),y + inc Ops + bne :+ + inc Ops+1 + +; Move bit 7 into Flag, then sign extend the value in A + +: asl a ; Flag into carry + ror Flag + cmp #$80 ; Sign bit into carry + ror a ; Sign extend the value + +; Done + rts + +.endproc + + +;---------------------------------------------------------------------------- +; Round a 16.8 fixed point value in eax + +.code +.proc RoundFix + + cmp #$80 ; frac(val) >= 0.5? + txa + ldx sreg + adc #$00 + bcc @L1 + inx +@L1: rts + +.endproc + +;---------------------------------------------------------------------------- +; Get and process one coordinate value. The scale factor is passed in a/x + +.code +.proc GetProcessedCoord + +; Save scale factor as left operand for multiplication + + sta ptr1 + stx ptr1+1 + +; Load next operation value. This will set the flags for the value in A. + + jsr GetOp + +; Since we know that the scale factor is always positive, we will remember +; the sign of the coordinate offset, make it positive, do an unsigned mul +; and negate the result if the vector was negative. This is faster than +; relying on the signed multiplication, which will do the same, but for +; both operands. + + sta tmp1 ; Remember sign of vector offset + bpl :+ + eor #$FF + clc + adc #$01 ; Negate +: ldx #$00 ; High byte is always zero + +; Multiplicate with the scale factor. + + jsr umul16x16r32 ; Multiplicate + +; The result is a 16.8 fixed point value. Round it. + + jsr RoundFix + +; Check the sign and negate if necessary + + bit tmp1 ; Check sign + bpl :+ + jmp negax ; Negate result if necessary +: rts + +.endproc ;---------------------------------------------------------------------------- ; @@ -50,12 +142,62 @@ Y2: .res 2 lda Flag pha -; Calculate a pointer to the vector ops for the given char (now in Y). +; Get the width of the char in question + lda _tgi_vectorfont + clc + adc #<(TGI_VECTORFONT::WIDTHS - TGI_VF_FIRSTCHAR) + sta Ops lda _tgi_vectorfont+1 - tax - ora _tgi_vectorfont - jeq Done ; Bail out if no font installed + adc #>(TGI_VECTORFONT::WIDTHS - TGI_VF_FIRSTCHAR) + sta Ops+1 + lda (Ops),y + +; Save the character + + sty Char + +; Calculate the width of the character by multiplying with the scale +; factor for the width + + sta ptr1 + lda #0 + sta ptr1+1 + + lda _tgi_textscalew + ldx _tgi_textscalew+1 + jsr umul16x16r32 + jsr RoundFix + +; Store the current value of the graphics cursor into BaseX/BaseY, then +; move it to the next character position + + pha + ldy #3 +: lda _tgi_curx,y + sta BaseX,y + dey + bpl :- + pla + + ldy _tgi_textdir + beq :+ ; Jump if horizontal text + + jsr negax + ldy #2 ; Offset of tgi_cury + +; Advance graphics cursor + +: clc + adc _tgi_curx,y + sta _tgi_curx,y + txa + adc _tgi_curx+1,y + sta _tgi_curx+1,y + +; Calculate a pointer to the vector ops for the given char (now in Y). We +; definitely expect a font here, that has to be checked by the caller. + lda _tgi_vectorfont clc adc #<(TGI_VECTORFONT::CHARS - 2*TGI_VF_FIRSTCHAR) @@ -64,6 +206,7 @@ Y2: .res 2 adc #>(TGI_VECTORFONT::CHARS - 2*TGI_VF_FIRSTCHAR) sta Ops+1 + ldy Char iny lda (Ops),y tax @@ -76,15 +219,15 @@ Y2: .res 2 Loop: lda _tgi_textscalew+0 ldx _tgi_textscalew+1 - jsr GetProcessedCoord + jsr GetProcessedCoord ; Get X vector -; X2 = tgi_curx + XMag * XDelta. +; X2 = BaseX + XMag * XDelta. clc - adc _tgi_curx+0 + adc BaseX+0 sta X2+0 txa - adc _tgi_curx+1 + adc BaseX+1 sta X2+1 ; Process the Y value @@ -93,16 +236,16 @@ Loop: lda _tgi_textscalew+0 ldx _tgi_textscaleh+1 jsr GetProcessedCoord -; Y2 = tgi_cury - YMag * YDelta; -; Y2 = tgi_cury + (~(YMag * YDelta) + 1); +; Y2 = BaseY - YMag * YDelta; +; Y2 = BaseY + (~(YMag * YDelta) + 1); eor #$FF sec ; + 1 - adc _tgi_cury+0 + adc BaseY+0 sta Y2+0 txa eor #$FF - adc _tgi_cury+1 + adc BaseY+1 sta Y2+1 ; Draw, then move - or just move @@ -143,62 +286,3 @@ Done: pla .endproc -;---------------------------------------------------------------------------- -; Get and process one coordinate value. The scale factor is passed in a/x - -.proc GetProcessedCoord - -; Save scale factor as left operand for multiplication - - sta ptr1 - stx ptr1+1 - -; Load delta value - - ldy #0 - lda (Ops),y - inc Ops - bne :+ - inc Ops+1 - -; Move bit 7 into Flag - -: asl a ; Flag into carry - ror Flag - -; Since we know that the scale factor is always positive, we will remember -; the sign of the coordinate offset, make it positive, do an unsigned mul -; and negate the result if the vector was negative. This is faster than -; relying on the signed multiplication, which will do the same, but for -; both operands. - - sta tmp1 ; Remember sign of vector offset - cmp #$80 ; Sign bit into carry - ror a ; Sign extend the value - bpl :+ - eor #$FF - clc - adc #$01 ; Negate -: ldx #$00 ; High byte is always zero - -; Multiplicate with the scale factor. - - jsr umul16x16r32 ; Multiplicate - -; The result is a 16.8 fixed point value. Round it. - - cmp #$80 ; frac(val) >= 0.5? - txa - adc #$00 - tay - lda sreg - adc #$00 - tax - tya - bit tmp1 ; Check sign - bpl :+ - jmp negax ; Negate result if necessary -: rts - -.endproc -