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author | Juan J. Martinez <jjm@usebox.net> | 2021-05-03 08:21:10 +0100 |
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committer | Juan J. Martinez <jjm@usebox.net> | 2021-05-03 10:00:00 +0100 |
commit | c3b0fa04a663fe233765b83d3be41a42aa08c25d (patch) | |
tree | 0befda349001ef6ce306b39378f9c70ad917363e /lib/cpcrslib/cpc_PutMaskSp.s | |
download | return-of-traxtor-cpc-c3b0fa04a663fe233765b83d3be41a42aa08c25d.tar.gz return-of-traxtor-cpc-c3b0fa04a663fe233765b83d3be41a42aa08c25d.zip |
Diffstat (limited to 'lib/cpcrslib/cpc_PutMaskSp.s')
-rw-r--r-- | lib/cpcrslib/cpc_PutMaskSp.s | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/lib/cpcrslib/cpc_PutMaskSp.s b/lib/cpcrslib/cpc_PutMaskSp.s new file mode 100644 index 0000000..e9683e4 --- /dev/null +++ b/lib/cpcrslib/cpc_PutMaskSp.s @@ -0,0 +1,79 @@ +;void cpc_PutMaskSprite(int *sprite, int *posicion); +;void cpc_PutMaskSp(int *sprite, char alto, char ancho, int *posicion); +.globl _cpc_PutMaskSp + +_cpc_PutMaskSp:: ; dibujar en pantalla el sprite + ; Entradas bc-> Alto Ancho + ; de-> origen + ; hl-> destino + ; Se alteran hl, bc, de, af + + LD IX,#2 + ADD IX,SP + LD L,4 (IX) + LD H,5 (IX) + LD A,3 (IX) + LD E,0 (IX) + LD D,1 (IX) + ld (#loop_alto_2m_PutMaskSp0+#1),a ;actualizo rutina de captura + SUB #1 + CPL + LD (#salto_lineam_PutMaskSp0+#1),A ;comparten los 2 los mismos valores. + ld A,2(IX) + ;JP cpc_PutMaskSp0 + +cpc_PutMaskSp0: + .DB #0XFD + LD H,A ;ALTO, SE PUEDE TRABAJAR CON HX DIRECTAMENTE + LD B,#7 +loop_alto_2m_PutMaskSp0: + LD C,#4 + EX DE,HL +loop_ancho_2m_PutMaskSp0: + LD A,(DE) ;LEO EL BYTE DEL FONDO + AND (HL) ;LO ENMASCARO + INC HL + OR (HL) ;LO ENMASCARO + LD (DE),A ;ACTUALIZO EL FONDO + INC DE + INC HL + DEC C + JP NZ,loop_ancho_2m_PutMaskSp0 + .DB #0XFD + DEC H + RET Z + EX DE,HL +salto_lineam_PutMaskSp0: + LD C,#0XFF + ADD HL,BC + JP nc,loop_alto_2m_PutMaskSp0 + LD BC,#0XC050 + ADD HL,BC + LD B,#7 + JP loop_alto_2m_PutMaskSp0 + +.globl _cpc_PutMaskSprite + +_cpc_PutMaskSprite:: ; dibujar en pantalla el sprite + ; Entradas bc-> Alto Ancho + ; de-> origen + ; hl-> destino + ; Se alteran hl, bc, de, af + + POP AF + POP HL + POP DE + PUSH AF + LD A,(HL) ;ANCHO + INC HL + ld (#loop_alto_2m_PutMaskSp0+#1),a ;ACTUALIZO RUTINA DE CAPTURA + ;LD (ANCHOT+1),A ;ACTUALIZO RUTINA DE DIBUJO + SUB #1 + CPL + LD (#salto_lineam_PutMaskSp0+#1),A ;COMPARTEN LOS 2 LOS MISMOS VALORES. + LD A,(HL) ;ALTO + INC HL + EX DE,HL + jp cpc_PutMaskSp0 + + |