makevid.asm

来自「linux下的任天堂模拟器代码。供大家参考。」· 汇编 代码 · 共 3,364 行 · 第 1/5 页

.clip
    mov edi,[dwinptrproc]
    xor eax,eax
    ; start drawing 1's from 0 to left
    cmp dl,0
    je .nextdot2
    mov al,dl
    inc al
.nextdot2
    xor byte[edi+eax],1
    inc al
    cmp al,dh
    jb .nextdot2
    xor byte[edi+eax],1
    jmp .donextwin
.outside
    cmp dl,dh
    jb .clip2
    mov edi,[dwinptrproc]
    mov ecx,64
.loopxor
    xor dword[edi],01010101h
    add edi,4
    dec ecx
    jnz .loopxor
    jmp .donextwin
.clip2
    cmp dl,1
    ja .nooutclip
    cmp dh,254
    jae near .clipped
.nooutclip
    mov edi,[dwinptrproc]
    xor eax,eax
    ; start drawing 1's from 0 to left
.nextdoti
    xor byte[edi+eax],1
    inc al
    cmp al,dl
    jb .nextdoti
    mov al,dh
    cmp al,255
    je .nextdot4i
    inc al
    ; start drawing 1's from right to 255
.nextdot3i
    xor byte[edi+eax],1
    inc al
    jnz .nextdot3i
.nextdot4i
.donextwin
    mov edi,[dwinptrproc]
    mov ecx,64
.loopxor2
    xor dword[edi],01010101h
    add edi,4
    dec ecx
    jnz .loopxor2
    ret

SECTION .bss
NEWSYM winonsp, resb 1
SECTION .text

NEWSYM makewindowsp
    mov al,[winobjen]
    mov byte[winonsp],0
    test dword[winenabm],1010h
    jz near .finishwin
    ; upon entry, al = win enable bits
    cmp byte[disableeffects],1
    je near .finishwin
    mov bl,al
    and bl,00001010b
    cmp bl,00001010b
    je near makedualwinsp
    cmp bl,0
    je near .finishwin
    mov byte[winonsp],1
    ; check if data matches previous data
    cmp al,[pwinspenab]
    jne .skipenab
    mov ebx,[winl1]
    cmp ebx,[pwinsptype]
    jne .skipenab2
    mov dword[cwinptr],winspdata+16
    mov al,[winonstype]
    mov [winonsp],al
    ret
.skipenab
    mov [pwinspenab],al
    mov ebx,[winl1]
.skipenab2
    mov [pwinsptype],ebx
    mov dl,[winl1]
    mov dh,[winr1]
    test al,00000010b
    jnz .win1
    mov dl,[winl2]
    mov dh,[winr2]
    shr al,2
.win1
    test al,01h
    jnz near .outside
    cmp dl,254
    je .clipped
    cmp dl,dh
    jb .clip
.clipped
    mov byte[winonsp],0
    mov byte[winonstype],0
    ret
.clip
    mov edi,winspdata+16
    xor eax,eax
    ; start drawing 1's from 0 to left
    cmp dl,0
    je .nextdot2
.nextdot
    mov byte[edi+eax],0
    inc al
    cmp al,dl
    jbe .nextdot
.nextdot2
    mov byte[edi+eax],1
    inc al
    cmp al,dh
    jb .nextdot2
    mov byte[edi+eax],1
    cmp dh,255
    je .nextdot4
    ; start drawing 1's from right to 255
.nextdot3
    mov byte[edi+eax],0
    inc al
    jnz .nextdot3
.nextdot4
    mov byte[winonsp],1
    mov byte[winonstype],1
    mov dword[cwinptr],winspdata+16
    ret
.outside
    cmp dl,dh
    jb .clip2
    mov byte[winonsp],0FFh
    mov byte[winonstype],0FFh
    mov dword[cwinptr],winspdata+16
    ret
.clip2
    cmp dl,1
    ja .nooutclip
    cmp dh,254
    jae near .clipped
.nooutclip
    mov edi,winspdata+16
    xor eax,eax
    ; start drawing 1's from 0 to left
.nextdoti
    mov byte[edi+eax],1
    inc al
    cmp al,dl
    jb .nextdoti
.nextdot2i
    mov byte[edi+eax],0
    inc al
    cmp al,dh
    jb .nextdot2i
    mov byte[edi+eax],0
    cmp al,255
    je .nextdot4i
    inc al
    ; start drawing 1's from right to 255
.nextdot3i
    mov byte[edi+eax],1
    inc al
    jnz .nextdot3i
.nextdot4i
    mov byte[winonsp],1
    mov byte[winonstype],1
    mov dword[cwinptr],winspdata+16
    ret
.finishwin
    ret

NEWSYM makedualwinsp
    mov ecx,ebp
    shl cl,1
    mov dl,[winlogicb]
    and dl,03h
    mov cl,dl
    mov byte[winonsp],1
    ; check if data matches previous data
    cmp cl,[dualwinsp]
    jne .skipenab3
    cmp al,[pwinspenab]
    jne .skipenab
    mov ebx,[winl1]
    cmp ebx,[pwinsptype]
    jne .skipenab2
    mov dword[cwinptr],winspdata+16
    mov al,[winonstype]
    mov [winonsp],al
    ret
.skipenab3
    mov [dualwinsp],cl
.skipenab
    mov [pwinspenab],al
    mov ebx,[winl1]
.skipenab2
    mov [pwinsptype],ebx
    mov dword[dwinptrproc],winspdata+16
    mov dword[cwinptr],winspdata+16
    mov byte[winonsp],1
    mov byte[winonstype],1
    jmp dualstartprocess

; window logic data
SECTION .bss
NEWSYM windowdata, resb 16
NEWSYM numwin, resb 1
NEWSYM multiwin, resb 1
NEWSYM multiclip, resb 1
NEWSYM multitype, resb 1
SECTION .text

;    jmp .finishwin
%macro procwindow 1
    cmp byte[disableeffects],1
    je near .finishwin
    mov al,%1
    test al,00001010b
    jz near .finishwin
    mov esi,windowdata
    mov bl,al
    mov byte[winon],1
    and bl,00001010b
    and al,00000101b
    mov byte[numwin],0
    cmp bl,00001010b
    je near .multiwin
    mov byte[multiwin],0
    test bl,00000010b
    jnz .win1
    mov cl,[winl2]
    mov ch,[winr2]
    shr al,2
    jmp .okaywin
.win1
    mov cl,[winl1]
    mov ch,[winr1]
    and al,01h
.okaywin
    cmp ch,255
    je .noinc
    inc ch
.noinc
    test al,01h
    jnz .wininside
    cmp cl,ch
    jae .noinsidemask
    mov [esi],cl
    mov byte[esi+1],01h
    mov [esi+2],ch
    mov byte[esi+3],0FFh
    mov byte[numwin],2
    jmp .finishwin
.noinsidemask
    mov byte[winon],0
    jmp .finishwin
.wininside
    cmp cl,ch
    ja .nooutsidemask
.nonotoutside
    cmp ch,254
    jb .skipnodraw
    cmp cl,1
    jbe .noinsidemask
.skipnodraw
    mov byte[esi],0
    mov byte[esi+1],01h
    mov [esi+2],cl
    mov byte[esi+3],0FFh
    mov [esi+4],ch
    mov byte[esi+5],01h
    mov byte[numwin],3
    jmp .finishwin
.nooutsidemask
    mov byte[esi],0
    mov byte[esi+1],01h
    mov byte[numwin],1
    jmp .finishwin
    ; **************
    ; *Multiwindows*
    ; **************
.multiwin
    mov byte[winon],0
    mov byte[multiwin],0
    mov [multiclip],al
    mov al,[winlogica]
    mov ecx,ebp
    shl ecx,1
    shr al,cl
    and al,3h
    mov [multitype],al
    mov cl,[winl1]
    mov ch,[winr1]
    mov esi,windowdata
    cmp ch,255
    je .noinc2
    inc ch
.noinc2
    test byte[multiclip],01h
    jnz .wininside2
    cmp cl,ch
    jae .nowina
    mov [esi],cl
    mov byte[esi+1],01h
    mov [esi+2],ch
    mov byte[esi+3],0FFh
    add esi,4
    mov byte[numwin],2
    jmp .secondwin
.nowina
    mov cl,[winl2]
    mov ch,[winr2]
    mov al,[multiclip]
    shr al,2
    jmp .okaywin
.wininside2
    cmp cl,ch
    ja .nooutsidemask2
    cmp ch,254
    jb .skipnodraw2
    cmp cl,1
    jbe .nooutsidemask2
.skipnodraw2
    mov byte[esi],0
    mov byte[esi+1],01h
    mov [esi+2],cl
    mov byte[esi+3],0FFh
    mov [esi+4],ch
    mov byte[esi+5],01h
    mov byte[numwin],3
    jmp .secondwin
.nooutsidemask2
    mov byte[esi],0
    mov byte[esi+1],01h
    mov byte[numwin],1
.secondwin
    mov byte[multiwin],1
    mov byte[winon],1
.finishwin
%endmacro

NEWSYM procspritessub
    test byte[scrndis],10h
    jnz .nosprites
    test byte[scrnon+1],10h
    jz .nosprites
    test byte[scrnon],10h
    jnz .nosprites
    cmp byte[winonsp],0FFh
    je .nosprites
    xor ebx,ebx
    mov bl,[curypos]
    add ebx,[cursprloc]
    mov cl,[ebx]
    cmp byte[sprprifix],0
    jne .sprprio
    add dword[cursprloc],256
.sprprio
    or cl,cl
    jz .nosprites
    call drawsprites
.nosprites
    ret

NEWSYM procspritesmain
    test byte[scrndis],10h
    jnz .nosprites
    test byte[scrnon],10h
    jz .nosprites
    cmp byte[winonsp],0FFh
    je .nosprites
    xor ebx,ebx
    mov bl,[curypos]
    add ebx,[cursprloc]
    mov cl,[ebx]
    cmp byte[sprprifix],0
    jne .sprprio
    add dword[cursprloc],256
.sprprio
    or cl,cl
    jz .nosprites
    call drawsprites
.nosprites
    ret

SECTION .bss
NEWSYM curbgnum, resb 1
SECTION .text

NEWSYM drawbackgrndsub
    mov esi,[colormodeofs]
    mov bl,[esi+ebp]
    cmp bl,0
    je near .noback
    mov al,[curbgnum]
    test byte[scrnon+1],al
    jz near .noback
    test byte[scrnon],al
    jnz near .noback
    test byte[alreadydrawn],al
    jnz near .noback
    test byte[scrndis],al
    jnz near .noback
    mov byte[winon],0
    test byte[winenabs],al
    jz near .nobackwin
;    procwindow [winbg1en+ebp]
    mov al,[winbg1en+ebp]
    call makewindow
    cmp byte[winon],0FFh
    je near .noback
.nobackwin
    mov bl,[curbgnum]
    mov byte[curmosaicsz],1
    test byte[mosaicon],bl
    jz .nomos
    mov bl,[mosaicsz]
    cmp bl,0
    je .nomos
    inc bl
    mov [curmosaicsz],bl
.nomos
    mov byte[bgcoloradder],0
    cmp byte[bgmode],0
    jne .nomode0
    mov eax,ebp
    shl eax,5
    mov [bgcoloradder],al
.nomode0
    mov esi,[bg1vbufloc+ebp*4]
    mov edi,[bg1tdatloc+ebp*4]
    mov edx,[bg1tdabloc+ebp*4]
    mov ebx,[bg1cachloc+ebp*4]
    mov eax,[bg1xposloc+ebp*4]
    mov cl,[curbgnum]
    test byte[bgtilesz],cl
    jnz .16x16
    mov ecx,[bg1yaddval+ebp*4]
    call draw8x8
    cmp byte[drawn],33
    jne .notalldrawn
    mov al,[curbgnum]
    or [alreadydrawn],al
.notalldrawn
    jmp .noback
.16x16
    mov ecx,[bg1yaddval+ebp*4]
    call draw16x16
    cmp byte[drawn],33
    jne .notalldrawnb
    mov al,[curbgnum]
    or [alreadydrawn],al
.notalldrawnb
.noback
    ret

NEWSYM drawbackgrndmain
    mov esi,[colormodeofs]
    mov bl,[esi+ebp]
    cmp bl,0
    je near .noback
    mov al,[curbgnum]
    test byte[scrnon],al
    jz near .noback
    test byte[alreadydrawn],al
    jnz near .noback
    test byte[scrndis],al
    jnz near .noback
    mov byte[winon],0
    test byte[winenabm],al
    jz near .nobackwin
;    procwindow [winbg1en+ebp]
    mov al,[winbg1en+ebp]
    call makewindow
    cmp byte[winon],0FFh
    je near .noback
.nobackwin
    mov bl,[curbgnum]
    mov byte[curmosaicsz],1
    test byte[mosaicon],bl
    jz .nomos
    mov bl,[mosaicsz]
    cmp bl,0
    je .nomos
    inc bl
    mov [curmosaicsz],bl
.nomos
    mov byte[bgcoloradder],0
    cmp byte[bgmode],0
    jne .nomode0
    mov eax,ebp
    shl eax,5
    mov [bgcoloradder],al
.nomode0
    mov esi,[bg1vbufloc+ebp*4]
    mov edi,[bg1tdatloc+ebp*4]
    mov edx,[bg1tdabloc+ebp*4]
    mov ebx,[bg1cachloc+ebp*4]
    mov eax,[bg1xposloc+ebp*4]
    mov cl,[curbgnum]
    test byte[bgtilesz],cl
    jnz .16x16
    mov ecx,[bg1yaddval+ebp*4]
    call draw8x8
    cmp byte[drawn],33
    jne .notalldrawn
    mov al,[curbgnum]
    or [alreadydrawn],al
.notalldrawn
    jmp .noback
.16x16
    mov ecx,[bg1yaddval+ebp*4]
    call draw16x16
    cmp byte[drawn],33
    jne .notalldrawnb
    mov al,[curbgnum]
    or [alreadydrawn],al
.notalldrawnb
.noback
    ret

NEWSYM procbackgrnd
    mov esi,[colormodeofs]
    mov bl,[esi+ebp]
    cmp bl,0
    je near .noback
    mov al,[curbgnum]
    mov ah,al
    test byte[scrndis],al
    jnz near .noback
    test [scrnon],ax
    jz near .noback
    push ebp
    shl ebp,6
    mov edi,cachebg1
    add edi,ebp
    pop ebp
    cmp bl,[curcolbg1+ebp]
    je .skipclearcache
    mov [curcolbg1+ebp],bl
    mov ax,[bg1ptr+ebp*2]
    mov [curbgofs1+ebp*2],ax
    call fillwithnothing
.skipclearcache
    xor eax,eax
    mov [curcolor],bl
    mov ax,[bg1objptr+ebp*2]
    decideonmode
    add edx,eax
    xor eax,eax
    mov [tempcach],edx
    xor edx,edx
    mov ax,[bg1objptr+ebp*2]
    mov [curtileptr],ax
    mov ax,[bg1ptr+ebp*2]
    mov [bgptr],ax
    cmp ax,[curbgofs1+ebp*2]
    je .skipclearcacheb
    mov [curbgofs1+ebp*2],ax
    call fillwithnothing
.skipclearcacheb
    mov ax,[bg1ptrb+ebp*2]
    mov [bgptrb],ax
    mov ax,[bg1ptrc+ebp*2]
    mov [bgptrc],ax
    mov ax,[bg1ptrd+ebp*2]
    mov [bgptrd],ax
    mov bl,[curbgnum]
    mov ax,[curypos]

    mov byte[curmosaicsz],1
    test byte[mosaicon],bl
    jz .nomos
    mov bl,[mosaicsz]
    cmp bl,0
    je .nomos
    inc bl
    mov [curmosaicsz],bl
    xor edx,edx
    xor bh,bh
    div bx
    xor edx,edx
    mul bx
    xor edx,edx
    mov dl,[mosaicsz]
    add ax,[MosaicYAdder+edx*2]
.nomos

    add ax,[bg1scroly+ebp*2]
    mov dx,[bg1scrolx+ebp*2]
    mov cl,[curbgnum]
    test byte[bgtilesz],cl
    jnz .16x16
    call proc8x8
    mov [bg1vbufloc+ebp*4],esi
    mov [bg1tdatloc+ebp*4],edi
    mov [bg1tdabloc+ebp*4],edx
    mov [bg1cachloc+ebp*4],ebx
    mov [bg1yaddval+ebp*4],ecx
    mov [bg1xposloc+ebp*4],eax
    ret
.16x16
    call proc16x16
    mov [bg1vbufloc+ebp*4],esi
    mov [bg1tdatloc+ebp*4],edi
    mov [bg1tdabloc+ebp*4],edx
    mov [bg1cachloc+ebp*4],ebx
    mov [bg1yaddval+ebp*4],ecx
    mov [bg1xposloc+ebp*4],eax
.noback
    ret

SECTION .bss
NEWSYM nextprimode, resb 1
NEWSYM cursprloc,   resd 1
NEWSYM curcolor,    resb 1
NEWSYM curtileptr,  resw 1
; esi = pointer to video buffer
; edi = pointer to tile data
; ebx = cached memory
; al = current x position
NEWSYM bg1vbufloc,  resd 1
NEWSYM bg2vbufloc,  resd 1
NEWSYM bg3vbufloc,  resd 1
NEWSYM bg4vbufloc,  resd 1
NEWSYM bg1tdatloc,  resd 1
NEWSYM bg2tdatloc,  resd 1
NEWSYM bg3tdatloc,  resd 1
NEWSYM bg4tdatloc,  resd 1
NEWSYM bg1tdabloc,  resd 1
NEWSYM bg2tdabloc,  resd 1
NEWSYM bg3tdabloc,  resd 1
NEWSYM bg4tdabloc,  resd 1
NEWSYM bg1cachloc,  resd 1
NEWSYM bg2cachloc,  resd 1
NEWSYM bg3cachloc,  resd 1
NEWSYM bg4cachloc,  resd 1
NEWSYM bg1yaddval,  resd 1
NEWSYM bg2yaddval,  resd 1
NEWSYM bg3yaddval,  resd 1
NEWSYM bg4yaddval,  resd 1
NEWSYM bg1xposloc,  resd 1
NEWSYM bg2xposloc,  resd 1
NEWSYM bg3xposloc,  resd 1
NEWSYM bg4xposloc,  resd 1
NEWSYM alreadydrawn, resb 1
SECTION .text

NEWSYM fillwithnothing
    push edi
    xor eax,eax
    mov ecx,16
.loop
    mov [edi],eax
    add edi,4
    dec ecx
    jnz .loop
    pop edi
    ret