mirror of
https://github.com/A2osX/A2osX.git
synced 2024-05-28 12:41:34 +00:00
422 lines
7.0 KiB
Plaintext
422 lines
7.0 KiB
Plaintext
NEW
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AUTO 3,1
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*--------------------------------------
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* CLIPPING Functions:
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* In:
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* Target Clipping Region in CLIP.Rect
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* YA = Control Block
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* Out:
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* CC : CB.Cache clipped & visible
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* CS : CB.Cache invisible
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*--------------------------------------
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CLIP.CB.Cache lda CB.Cache+S.CB.CMD
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and #$7F remove S.CB.CMD.OSD
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tax
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jmp (J.CLIP-2,x)
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*--------------------------------------
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CLIP.Point
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clc
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rts
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*--------------------------------------
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CLIP.HLine >LDYA CB.Cache+S.CB.Y1
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>SCMPYA CLIP.Rect+S.RECT.Y2
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bpl .9
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>LDYA CB.Cache+S.CB.Y1
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>SCMPYA CLIP.Rect+S.RECT.Y1
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bmi .9
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>LDYA CLIP.Rect+S.RECT.X1
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>STYAIFGTR CB.Cache+S.CB.X1
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>LDYA CLIP.Rect+S.RECT.X2
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>STYAIFLWR CB.Cache+S.CB.X2
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clc
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rts
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.9 sec
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rts
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*--------------------------------------
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CLIP.VLine >LDYA CB.Cache+S.CB.X1
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>SCMPYA CLIP.Rect+S.RECT.X2
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bpl .9
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>LDYA CB.Cache+S.CB.X1
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>SCMPYA CLIP.Rect+S.RECT.X1
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bmi .9
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>LDYA CLIP.Rect+S.RECT.Y1
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>STYAIFGTR CB.Cache+S.CB.Y1
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>LDYA CLIP.Rect+S.RECT.Y2
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>STYAIFLWR CB.Cache+S.CB.Y2
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clc
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rts
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.9 sec
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rts
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*--------------------------------------
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CLIP.Rectangle jsr CLIP.Rect.Overlap
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bcs .9
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>LDYA CLIP.Rect+S.RECT.X1
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>STYAIFGTR CB.Cache+S.CB.X1
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>LDYA CLIP.Rect+S.RECT.X2
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>STYAIFLWR CB.Cache+S.CB.X2
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>LDYA CLIP.Rect+S.RECT.Y1
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>STYAIFGTR CB.Cache+S.CB.Y1
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>LDYA CLIP.Rect+S.RECT.Y2
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>STYAIFLWR CB.Cache+S.CB.Y2
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clc
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.9 rts
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*--------------------------------------
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CLIP.Text
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clc
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rts
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CLIP.Text.9 sec
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CLIP.Text.RTS rts
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*--------------------------------------
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* BitBlt :
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*--------------------------------------
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CLIP.BitBlt jsr CB.SetX2Y2 set X2=X1+W-1 Y2=X1+H-1
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jsr CLIP.Rect.Overlap
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bcs CLIP.Text.RTS
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lda CLIP.Rect+S.RECT.X1
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sec
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sbc CB.Cache+S.CB.X1
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sta DX
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lda CLIP.Rect+S.RECT.X1+1
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sbc CB.Cache+S.CB.X1+1
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sta DX+1
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bvc .1
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eor #$80
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.1 bmi .2
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lda CB.Cache+S.CB.X1
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clc
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adc DX
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sta CB.Cache+S.CB.X1
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lda CB.Cache+S.CB.X1+1
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adc DX+1
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sta CB.Cache+S.CB.X1+1
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lda CB.Cache+S.CB.SrcX
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clc
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adc DX
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sta CB.Cache+S.CB.SrcX
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lda CB.Cache+S.CB.SrcX+1
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adc DX+1
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sta CB.Cache+S.CB.SrcX+1
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lda CB.Cache+S.CB.SrcW
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sec
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sbc DX
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sta CB.Cache+S.CB.SrcW
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lda CB.Cache+S.CB.SrcW+1
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sbc DX+1
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sta CB.Cache+S.CB.SrcW+1
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bcc CLIP.Text.9
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.2 lda CB.Cache+S.CB.X2
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sec
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sbc CLIP.Rect+S.RECT.X2
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sta DX
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lda CB.Cache+S.CB.X2+1
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sbc CLIP.Rect+S.RECT.X2+1
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sta DX+1
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bvc .3
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eor #$80
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.3 bmi .4
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lda CB.Cache+S.CB.SrcW
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sec
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sbc DX
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sta CB.Cache+S.CB.SrcW
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lda CB.Cache+S.CB.SrcW+1
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sbc DX+1
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sta CB.Cache+S.CB.SrcW+1
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bcc .9
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.4 lda CLIP.Rect+S.RECT.Y1
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sec
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sbc CB.Cache+S.CB.Y1
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sta DX
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lda CLIP.Rect+S.RECT.Y1+1
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sbc CB.Cache+S.CB.Y1+1
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sta DX+1
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bvc .5
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eor #$80
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.5 bmi .6
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lda CB.Cache+S.CB.Y1
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clc
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adc DX
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sta CB.Cache+S.CB.Y1
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lda CB.Cache+S.CB.Y1+1
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adc DX+1
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sta CB.Cache+S.CB.Y1+1
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lda CB.Cache+S.CB.SrcY
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clc
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adc DX
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sta CB.Cache+S.CB.SrcY
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lda CB.Cache+S.CB.SrcY+1
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adc DX+1
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sta CB.Cache+S.CB.SrcY+1
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lda CB.Cache+S.CB.SrcH
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sec
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sbc DX
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sta CB.Cache+S.CB.SrcH
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lda CB.Cache+S.CB.SrcH+1
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sbc DX+1
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sta CB.Cache+S.CB.SrcH+1
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bcc .9
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.6 lda CB.Cache+S.CB.Y2
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sec
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sbc CLIP.Rect+S.RECT.Y2
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sta DX
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lda CB.Cache+S.CB.Y2+1
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sbc CLIP.Rect+S.RECT.Y2+1
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sta DX+1
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bvc .7
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eor #$80
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.7 bmi .8
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lda CB.Cache+S.CB.SrcH
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sec
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sbc DX
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sta CB.Cache+S.CB.SrcH
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lda CB.Cache+S.CB.SrcH+1
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sbc DX+1
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sta CB.Cache+S.CB.SrcH+1
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bcc .9
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.8 clc
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.99 rts
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.9 sec
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rts
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*--------------------------------------
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CLIP.Line.LEFT .EQ 1
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CLIP.Line.RIGHT .EQ 2
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CLIP.Line.BOTTOM .EQ 4
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CLIP.Line.TOP .EQ 8
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*--------------------------------------
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CLIP.Line jsr CLIP.Line.EncodeP1
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jsr CLIP.Line.EncodeP2
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.1 lda CLIP.Line.P1
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ora CLIP.Line.P2
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beq .88
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lda CLIP.Line.P1
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and CLIP.Line.P2
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bne .99
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lda CLIP.Line.P1
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beq .5
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bit #CLIP.Line.TOP
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beq .2
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* Y1 is above S.CB.Y1....
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* DY=Y2-Y1;
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jsr CLIP.Line.EncodeP1
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bra .1
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.2 bit #CLIP.Line.BOTTOM
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beq .3
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* Y1 is below S.CB.Y2....
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jsr CLIP.Line.EncodeP1
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bra .1
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.3 bit #CLIP.Line.RIGHT
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beq .4
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* X1 is after S.CB.X2....
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jsr CLIP.Line.EncodeP1
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bra .1
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* X1 is before S.CB.X1....
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.4 jsr CLIP.Line.EncodeP1
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bra .1
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* P2
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.5 lda CLIP.Line.P2
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bit #CLIP.Line.TOP
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beq .6
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* Y2 is above S.CB.Y1....
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jsr CLIP.Line.EncodeP2
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bra .1
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.6 bit #CLIP.Line.BOTTOM
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beq .7
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* Y2 is below S.CB.Y2....
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jsr CLIP.Line.EncodeP2
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bra .1
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.7 bit #CLIP.Line.RIGHT
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beq .8
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* X2 is after S.CB.X2....
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jsr CLIP.Line.EncodeP2
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bra .1
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* X2 is before S.CB.X1....
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.8 jsr CLIP.Line.EncodeP2
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bra .1
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.88 clc
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rts
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.99 sec
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rts
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*--------------------------------------
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CLIP.Line.EncodeP1
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ldy #0
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lda CB.Cache+S.CB.X1
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ldx CB.Cache+S.CB.X1+1
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jsr CLIP.Line.EncodeX.AX
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lda CB.Cache+S.CB.Y1
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ldx CB.Cache+S.CB.Y1+1
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jsr CLIP.Line.EncodeY.AX
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sty CLIP.Line.P1
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rts
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*--------------------------------------
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CLIP.Line.EncodeP2
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ldy #0
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lda CB.Cache+S.CB.X2
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ldx CB.Cache+S.CB.X2+1
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jsr CLIP.Line.EncodeX.AX
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lda CB.Cache+S.CB.Y2
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ldx CB.Cache+S.CB.Y2+1
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jsr CLIP.Line.EncodeY.AX
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sty CLIP.Line.P2
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rts
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*--------------------------------------
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CLIP.Line.EncodeX.AX
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pha
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>SCMPAX CLIP.Rect+S.RECT.X1
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bpl .1
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pla
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tya
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ora #CLIP.Line.LEFT
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tay
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rts
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.1 pla
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>SCMPAX CLIP.Rect+S.RECT.X2
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bmi .8
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tya
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ora #CLIP.Line.RIGHT
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tay
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.8 rts
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*--------------------------------------
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CLIP.Line.EncodeY.AX
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pha
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>SCMPAX CLIP.Rect+S.RECT.Y1
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bpl .1
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pla
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tya
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ora #CLIP.Line.TOP
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tya
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rts
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.1 pla
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>SCMPAX CLIP.Rect+S.RECT.Y2
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bmi .8
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tya
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ora #CLIP.Line.BOTTOM
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tay
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.8 rts
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*--------------------------------------
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CLIP.Rect.Overlap
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>LDYA CB.Cache+S.CB.X1
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>SCMPYA CLIP.Rect+S.RECT.X2
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bpl .9
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>LDYA CB.Cache+S.CB.X2
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>SCMPYA CLIP.Rect+S.RECT.X1
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bmi .9
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>LDYA CB.Cache+S.CB.Y1
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>SCMPYA CLIP.Rect+S.RECT.Y2
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bpl .9
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>LDYA CB.Cache+S.CB.Y2
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>SCMPYA CLIP.Rect+S.RECT.Y1
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bmi .9
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clc
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rts
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.9 sec
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rts
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*--------------------------------------
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CLIP.GetRect >STYA .1+1
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ldy #S.OBJ.Y2+1
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ldx #7
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.1 lda $ffff,y
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sta CLIP.Rect,x
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dey
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dex
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bpl .1
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rts
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*--------------------------------------
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MAN
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SAVE usr/src/lib/libgui.s.clip
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LOAD usr/src/lib/libgui.s
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ASM
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