newgfx.asm

linux下的任天堂模拟器代码。供大家参考。

    sprdrawa sprdrawpra
    pop edx
.nodrawspr
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    ret
.notprio
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawa sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    ret
.drawspriteflipx
    mov bx,[esi]
    push edx
    mov ch,[esi+6]
    mov dl,[esi+7]
    and edx,03h
    cmp edx,[csprival]
    jne near .notpriof
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawpra
    pop edx
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
.endobj
    pop ebx
    pop esi
    ret
.notpriof
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    ret
.clearcsprmem
    xor eax,eax
    mov ecx,64
    mov edi,sprpriodata+16
    rep stosd
    pop ebx
    pop esi
    ret

.drawsingle
    push esi
    push ebx
    mov edi,esi
    mov esi,[sprtbng+ebx*4]
    mov edx,ecx
    and edx,0FFh
    shl edx,3
    sub edx,8
    add edx,esi
    mov esi,edx
    xor ebx,ebx
.loopobj2
    test byte[esi+7],20h
    jnz near .drawspriteflipx2
    mov bx,[esi]
    mov ch,[esi+6]
    mov esi,[esi+2]
    sprdrawa sprdrawprb
    sub edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj2
    pop ebx
    pop esi
    ret
.drawspriteflipx2
    mov bx,[esi]
    mov ch,[esi+6]
    mov esi,[esi+2]
    sprdrawaf sprdrawprb
    sub edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj2
    pop ebx
    pop esi
    ret

NEWSYM drawsprngm7h
    cmp byte[winbg1enval+ebx+4*256],0
    jne near drawsprngm7w
    test dword[sprleftpr+ebx*4],80000000h
    jnz near .drawsingle
    push esi
    push ebx
    mov edi,esi
    mov esi,[sprtbng+ebx*4]
    mov edx,esi
    xor ebx,ebx
.loopobj
    test byte[esi+7],20h
    jnz near .drawspriteflipx
    mov bx,[esi]
    push edx
    mov ch,[esi+6]
    mov dl,[esi+7]
    and edx,03h
    cmp edx,[csprival]
    jne near .notprio
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawa sprdrawpra
    pop edx
.nodrawspr
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    ret
.notprio
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawa sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    ret
.drawspriteflipx
    mov bx,[esi]
    push edx
    mov ch,[esi+6]
    mov dl,[esi+7]
    and edx,03h
    cmp edx,[csprival]
    jne near .notpriof
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawpra
    pop edx
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
.endobj
    pop ebx
    pop esi
    ret
.notpriof
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    ret
.clearcsprmem
    xor eax,eax
    mov ecx,64
    mov edi,sprpriodata+16
    rep stosd
    pop ebx
    pop esi
    ret

.drawsingle
    push esi
    push ebx
    mov edi,esi
    mov esi,[sprtbng+ebx*4]
    mov edx,ecx
    and edx,0FFh
    shl edx,3
    sub edx,8
    add edx,esi
    mov esi,edx
    xor ebx,ebx
.loopobj2
    test byte[esi+7],20h
    jnz near .drawspriteflipx2
    mov bx,[esi]
    mov ch,[esi+6]
    mov esi,[esi+2]
    sprdrawa sprdrawprb
    sub edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj2
    pop ebx
    pop esi
    ret
.drawspriteflipx2
    mov bx,[esi]
    mov ch,[esi+6]
    mov esi,[esi+2]
    sprdrawaf sprdrawprb
    sub edx,8
    mov esi,edx
    dec cl
    jnz near .loopobj2
    pop ebx
    pop esi
    ret

SECTION .bss
NEWSYM NGNumSpr, resb 1
SECTION .text

NEWSYM drawsprngw
    mov [NGNumSpr],cl
    mov ecx,[objclineptr+ebx*4]
    add ecx,[ngwinptr]
    test dword[sprleftpr+ebx*4],80000000h
    jnz near .drawsingle
    push esi
    push ebx
    mov edi,esi
    mov esi,[sprtbng+ebx*4]
    mov edx,esi
    xor ebx,ebx
.loopobj
    test byte[esi+7],20h
    jnz near .drawspriteflipx
    mov bx,[esi]
    push edx
    mov dl,[esi+7]
    and edx,03h
    cmp edx,[csprival]
    jne near .notprio
    mov dh,[esi+6]
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawa sprdrawprawb
    pop edx
.nodrawspr
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.notprio
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawa sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.drawspriteflipx
    mov bx,[esi]
    push edx
    mov dl,[esi+7]
    and edx,03h
    cmp edx,[csprival]
    jne near .notpriof
    mov dh,[esi+6]
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawprawb
    pop edx
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
.endobj
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.notpriof
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    xor ecx,ecx
    xor ecx,ecx
    ret
.clearcsprmem
    xor eax,eax
    mov ecx,64
    mov edi,sprpriodata+16
    rep stosd
    pop ebx
    pop esi
    ret

.drawsingle
    push esi
    push ebx
    mov edi,esi
    mov esi,[sprtbng+ebx*4]
    xor edx,edx
    mov dl,[NGNumSpr]
    and edx,0FFh
    shl edx,3
    sub edx,8
    add edx,esi
    mov esi,edx
    xor ebx,ebx
.loopobj2
    test byte[esi+7],20h
    jnz near .drawspriteflipx2
    push edx
    mov bx,[esi]
    mov dh,[esi+6]
    mov esi,[esi+2]
    sprdrawa sprdrawprbwb
    pop edx
    sub edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj2
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.drawspriteflipx2
    push edx
    mov bx,[esi]
    mov dh,[esi+6]
    mov esi,[esi+2]
    sprdrawaf sprdrawprbwb
    pop edx
    sub edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj2
    pop ebx
    pop esi
    xor ecx,ecx
    ret

NEWSYM drawsprngm7w
    mov [NGNumSpr],cl
    mov ecx,[objclineptr+ebx*4]
    add ecx,[ngwinptr]
    test dword[sprleftpr+ebx*4],80000000h
    jnz near .drawsingle
    push esi
    push ebx
    mov edi,esi
    mov esi,[sprtbng+ebx*4]
    mov edx,esi
    xor ebx,ebx
.loopobj
    test byte[esi+7],20h
    jnz near .drawspriteflipx
    mov bx,[esi]
    push edx
    mov dl,[esi+7]
    and edx,03h
    cmp edx,[csprival]
    jne near .notprio
    mov dh,[esi+6]
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawa sprdrawprawb
    pop edx
.nodrawspr
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.notprio
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawa sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.drawspriteflipx
    mov bx,[esi]
    push edx
    mov dl,[esi+7]
    and edx,03h
    cmp edx,[csprival]
    jne near .notpriof
    mov dh,[esi+6]
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawprawb
    pop edx
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
.endobj
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.notpriof
    mov esi,[esi+2]
    mov dl,[csprbit]
    sprdrawaf sprdrawpra2
    pop edx
    add edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj
    rol byte[csprbit],1
    cmp byte[csprbit],1
    je near .clearcsprmem
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.clearcsprmem
    xor eax,eax
    mov ecx,64
    mov edi,sprpriodata+16
    rep stosd
    pop ebx
    pop esi
    ret

.drawsingle
    push esi
    push ebx
    mov edi,esi
    mov esi,[sprtbng+ebx*4]
    xor edx,edx
    mov dl,[NGNumSpr]
    and edx,0FFh
    shl edx,3
    sub edx,8
    add edx,esi
    mov esi,edx
    xor ebx,ebx
.loopobj2
    test byte[esi+7],20h
    jnz near .drawspriteflipx2
    push edx
    mov bx,[esi]
    mov dh,[esi+6]
    mov esi,[esi+2]
    sprdrawa sprdrawprbwb
    pop edx
    sub edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj2
    pop ebx
    pop esi
    xor ecx,ecx
    ret
.drawspriteflipx2
    push edx
    mov bx,[esi]
    mov dh,[esi+6]
    mov esi,[esi+2]
    sprdrawaf sprdrawprbwb
    pop edx
    sub edx,8
    mov esi,edx
    dec byte[NGNumSpr]
    jnz near .loopobj2
    pop ebx
    pop esi
    xor ecx,ecx
    ret

;*******************************************************
; Prepare Sprite Priorities
;*******************************************************

NEWSYM makesprprtable
    ret

NEWSYM preparesprpr
    xor ebx,ebx
    mov bl,[curypos]
    mov eax,[sprleftpr+ebx*4]
    mov [sprclprio],eax
    cmp eax,00000001h
    je .single
    cmp eax,00000100h
    je .single
    cmp eax,00010000h
    je .single
    cmp eax,01000000h
    je .single
    mov dword[sprsingle],0
    ret
.single
    mov dword[sprsingle],1
    ret

SECTION .bss
NEWSYM sprclprio,  resd 1
NEWSYM sprsingle,  resd 1
SECTION .text