821 lines
22 KiB
NASM
821 lines
22 KiB
NASM
;Copyright (C) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
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;
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;This program is free software; you can redistribute it and/or
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;modify it under the terms of the GNU General Public License
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;as published by the Free Software Foundation; either
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;version 2 of the License, or (at your option) any later
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;version.
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;
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;This program is distributed in the hope that it will be useful,
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;but WITHOUT ANY WARRANTY; without even the implied warranty of
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;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;GNU General Public License for more details.
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;
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;You should have received a copy of the GNU General Public License
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;along with this program; if not, write to the Free Software
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;Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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%include "macros.mac"
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EXTSYM mode7tab,winptrref,nglogicval,winlogicaval
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EXTSYM curmosaicsz,curvidoffset,cwinptr,domosaic,mode7A,mode7B
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EXTSYM mode7C,mode7D,mode7X0,mode7Y0,mode7set,vram,vrama,winon,xtravbuf
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EXTSYM ngwinen, winbg1enval, BuildWindow, ngwintable, ngcwinptr, domosaicng
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EXTSYM pesimpng
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EXTSYM mode7hr
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EXTSYM BGMA, mode7ab, mode7cd, BG1SYl, BG1SXl, mosenng, mosszng
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NEWSYM Mode7AsmStart
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%include "video/mode7.mac"
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;*******************************************************
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; Processes & Draws Mode 7
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;*******************************************************
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%macro Mode7Normal 0
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or dl,dl
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jz %%nodrawb
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mov byte[esi],dl
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%%nodrawb
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inc esi
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%endmacro
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%macro Mode7Window 0
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or dl,dl
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jz %%nodrawbw
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test byte[ebp],0FFh
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jnz %%nodrawbw
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mov byte[esi],dl
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%%nodrawbw
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inc esi
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inc ebp
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%endmacro
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NEWSYM Makemode7Table
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xor eax,eax
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.nextentry
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mov cl,al
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mov dl,ah
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and cl,07h
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and dl,07h
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shl cl,4
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shl dl,1
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inc dl
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add dl,cl
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mov [mode7tab+eax],dl
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dec ax
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jnz .nextentry
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ret
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;mode7tab times 65536 db 0
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; backup mode7X0, mode7Y0, Mode7A, and Mode7B
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NEWSYM drawmode7
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mov esi,[cwinptr]
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mov [winptrref],esi
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Mode7Calculate
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; esi = pointer to video buffer
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mov esi,[curvidoffset] ; esi = [vidbuffer] + curypos * 288 + 16
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cmp byte[curmosaicsz],1
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je .nomosaic
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mov esi,xtravbuf+16
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mov ecx,64
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.clearnext
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mov dword[esi],0
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add esi,4
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dec ecx
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jnz .clearnext
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mov esi,xtravbuf+16
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.nomosaic
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; esi = pointer to video buffer
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; edi = pointer to vram
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; [.mode7xadder] = dword value to add to x value (decimal between 7 & 8bit)
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; [.mode7yadder] = dword value to add to y value (decimal between 7 & 8bit)
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; [.mode7xpos] = dword value of x position, decimal between 7 & 8bit
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; [.mode7xpos+1] = word value of x position
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; [.mode7ypos] = dword value of y position, decimal between 7 & 8bit
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; [.mode7ypos+1] = word value of y position
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xor ebx,ebx
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xor edx,edx
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xor ecx,ecx
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mov dword[.mode7xadd2],800h
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mov byte[.mode7xinc],2
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mov byte[.mode7xincc],0
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test dword[.mode7xadder],80000000h
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jz .noneg
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mov dword[.mode7xadd2],-800h
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mov byte[.mode7xinc],-2
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mov byte[.mode7xincc],0FEh
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.noneg
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mov dword[.mode7yadd2],800h
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mov byte[.mode7yinc],1
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test dword[.mode7yadder],80000000h
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jz .noneg2
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mov dword[.mode7yadd2],-800h
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mov byte[.mode7yinc],-1
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.noneg2
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cmp byte[curmosaicsz],1
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jne .domosaic
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cmp byte[winon],0
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jne near .drawmode7win
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.domosaic
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mov edi,[vram]
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cmp dword[.mode7xadder],7F0h
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jg near .nextval3
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cmp dword[.mode7xadder],-7F0h
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jl near .nextval3
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cmp dword[.mode7yadder],7F0h
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jg near .nextval3
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cmp dword[.mode7yadder],-7F0h
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jl near .nextval3
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Mode7Process Mode7Normal, domosaic, 1
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.nextval3
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Mode7ProcessB Mode7Normal, domosaic, 1
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ALIGN32
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.temp dd 0 ; for byte move left
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.mode7xpos dd 0 ; x position
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.tempa2 dd 0 ; keep this blank!
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.mode7xrpos dd 0 ; x position
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.tempa dd 0 ; keep this blank!
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.mode7ypos dd 0 ; y position
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.tempb2 dd 0 ; keep this blank!
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.mode7yrpos dd 0 ; y position
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.tempb dd 0 ; keep this blank!
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.mode7xadder dd 0 ; number to add for x
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.tempc2 dd 0 ; keep this blank!
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.mode7xadd2 dd 0 ; number to add for x
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.tempc dd 0 ; keep this blank!
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.mode7yadder dd 0 ; number to add for y
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.tempd2 dd 0 ; keep this blank!
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.mode7yadd2 dd 0 ; number to add for y
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.tempd dd 0 ; keep this blank!
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.mode7ptr dd 0 ; pointer value
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.mode7xinc dd 0 ; number to add for x
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.mode7xincc dd 0 ; range check for x
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.mode7yinc dd 0 ; number to add for y
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.mode7xsloc dd 0 ; which screen x
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.mode7ysloc dd 0 ; which screen y
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.mode7xsrl dd 0 ; which relative screen x
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.mode7ysrl dd 0 ; which relative screen y
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.cxloc dw 0 ; cx location
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.cyloc dw 0 ; cy location
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.m7xaddofa dd 0
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.m7xaddof2a dd 0
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.m7yaddofa dd 0
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.m7yaddof2a dd 0
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.drawmode7win
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.domosaicw
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mov ebp,[cwinptr]
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mov edi,[vram]
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cmp dword[.mode7xadder],7F0h
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jg near .nextval3w
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cmp dword[.mode7xadder],-7F0h
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jl near .nextval3w
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cmp dword[.mode7yadder],7F0h
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jg near .nextval3w
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cmp dword[.mode7yadder],-7F0h
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jl near .nextval3w
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Mode7Process Mode7Window, domosaic, 1
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.nextval3w
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Mode7ProcessB Mode7Window, domosaic, 1
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NEWSYM drawmode7win
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cmp byte[mode7hr+ebx],1
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je near drawmode7winhr
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ProcessBuildWindow 0
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.nohr
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mov esi,[cwinptr]
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mov [winptrref],esi
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Mode7Calculate
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; esi = pointer to video buffer
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mov esi,[curvidoffset] ; esi = [vidbuffer] + curypos * 288 + 16
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mov [pesimpng],esi
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cmp byte[curmosaicsz],1
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je .nomosaic
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mov esi,xtravbuf+16
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mov ecx,64
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.clearnext
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mov dword[esi],0
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add esi,4
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dec ecx
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jnz .clearnext
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mov esi,xtravbuf+16
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.nomosaic
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; esi = pointer to video buffer
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; edi = pointer to vram
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; [.mode7xadder] = dword value to add to x value (decimal between 7 & 8bit)
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; [.mode7yadder] = dword value to add to y value (decimal between 7 & 8bit)
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; [.mode7xpos] = dword value of x position, decimal between 7 & 8bit
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; [.mode7xpos+1] = word value of x position
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; [.mode7ypos] = dword value of y position, decimal between 7 & 8bit
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; [.mode7ypos+1] = word value of y position
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xor ebx,ebx
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xor edx,edx
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xor ecx,ecx
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mov dword[.mode7xadd2],800h
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mov byte[.mode7xinc],2
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mov byte[.mode7xincc],0
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test dword[.mode7xadder],80000000h
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jz .noneg
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mov dword[.mode7xadd2],-800h
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mov byte[.mode7xinc],-2
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mov byte[.mode7xincc],0FEh
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.noneg
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mov dword[.mode7yadd2],800h
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mov byte[.mode7yinc],1
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test dword[.mode7yadder],80000000h
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jz .noneg2
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mov dword[.mode7yadd2],-800h
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mov byte[.mode7yinc],-1
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.noneg2
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cmp byte[ngwinen],1
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je near .drawmode7win
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mov edi,[vram]
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cmp dword[.mode7xadder],7F0h
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jg near .nextval3
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cmp dword[.mode7xadder],-7F0h
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jl near .nextval3
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cmp dword[.mode7yadder],7F0h
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jg near .nextval3
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cmp dword[.mode7yadder],-7F0h
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jl near .nextval3
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Mode7Process Mode7Normal, domosaicng, 1
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.nextval3
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Mode7ProcessB Mode7Normal, domosaicng, 1
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ALIGN32
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.temp dd 0 ; for byte move left
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.mode7xpos dd 0 ; x position
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.tempa2 dd 0 ; keep this blank!
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.mode7xrpos dd 0 ; x position
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.tempa dd 0 ; keep this blank!
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.mode7ypos dd 0 ; y position
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.tempb2 dd 0 ; keep this blank!
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.mode7yrpos dd 0 ; y position
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.tempb dd 0 ; keep this blank!
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.mode7xadder dd 0 ; number to add for x
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.tempc2 dd 0 ; keep this blank!
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.mode7xadd2 dd 0 ; number to add for x
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.tempc dd 0 ; keep this blank!
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.mode7yadder dd 0 ; number to add for y
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.tempd2 dd 0 ; keep this blank!
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.mode7yadd2 dd 0 ; number to add for y
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.tempd dd 0 ; keep this blank!
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.mode7ptr dd 0 ; pointer value
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.mode7xinc dd 0 ; number to add for x
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.mode7xincc dd 0 ; range check for x
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.mode7yinc dd 0 ; number to add for y
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.mode7xsloc dd 0 ; which screen x
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.mode7ysloc dd 0 ; which screen y
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.mode7xsrl dd 0 ; which relative screen x
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.mode7ysrl dd 0 ; which relative screen y
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.cxloc dw 0 ; cx location
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.cyloc dw 0 ; cy location
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.m7xaddofa dd 0
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.m7xaddof2a dd 0
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.m7yaddofa dd 0
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.m7yaddof2a dd 0
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.drawmode7win
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.domosaicw
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mov ebx,[.mode7xrpos]
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mov [mode7xrpos],ebx
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mov ebx,[.mode7yrpos]
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mov [mode7yrpos],ebx
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mov ebx,[.mode7xadder]
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mov [mode7xadder],ebx
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mov ebx,[.mode7yadder]
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mov [mode7yadder],ebx
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mov ebx,[.mode7xpos]
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mov [mode7xpos],ebx
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mov ebx,[.mode7ypos]
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mov [mode7ypos],ebx
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mov edi,[vram]
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Mode7Processngw Mode7Normal, domosaicng, 1
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NEWSYM drawmode7winB
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cmp byte[mode7hr+ebx],1
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je near drawmode7winBhr
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ProcessBuildWindow 0
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.nohr
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mov esi,[cwinptr]
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mov [winptrref],esi
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Mode7CalculateB
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; esi = pointer to video buffer
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mov esi,[curvidoffset] ; esi = [vidbuffer] + curypos * 288 + 16
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cmp byte[curmosaicsz],1
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je .nomosaic
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mov esi,xtravbuf+16
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mov ecx,64
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.clearnext
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mov dword[esi],0
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add esi,4
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dec ecx
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jnz .clearnext
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mov esi,xtravbuf+16
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.nomosaic
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; esi = pointer to video buffer
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; edi = pointer to vram
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; [.mode7xadder] = dword value to add to x value (decimal between 7 & 8bit)
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; [.mode7yadder] = dword value to add to y value (decimal between 7 & 8bit)
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; [.mode7xpos] = dword value of x position, decimal between 7 & 8bit
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; [.mode7xpos+1] = word value of x position
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; [.mode7ypos] = dword value of y position, decimal between 7 & 8bit
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; [.mode7ypos+1] = word value of y position
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xor ebx,ebx
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xor edx,edx
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xor ecx,ecx
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mov dword[.mode7xadd2],800h
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mov byte[.mode7xinc],2
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mov byte[.mode7xincc],0
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test dword[.mode7xadder],80000000h
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jz .noneg
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mov dword[.mode7xadd2],-800h
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mov byte[.mode7xinc],-2
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mov byte[.mode7xincc],0FEh
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.noneg
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mov dword[.mode7yadd2],800h
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mov byte[.mode7yinc],1
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test dword[.mode7yadder],80000000h
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jz .noneg2
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mov dword[.mode7yadd2],-800h
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mov byte[.mode7yinc],-1
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.noneg2
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cmp byte[ngwinen],1
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je near .drawmode7win
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mov edi,[vram]
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cmp dword[.mode7xadder],7F0h
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jg near .nextval3
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cmp dword[.mode7xadder],-7F0h
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jl near .nextval3
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cmp dword[.mode7yadder],7F0h
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jg near .nextval3
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cmp dword[.mode7yadder],-7F0h
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jl near .nextval3
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Mode7Process Mode7Normal, domosaic, 1
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.nextval3
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Mode7ProcessB Mode7Normal, domosaic, 1
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ALIGN32
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.temp dd 0 ; for byte move left
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.mode7xpos dd 0 ; x position
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.tempa2 dd 0 ; keep this blank!
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.mode7xrpos dd 0 ; x position
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.tempa dd 0 ; keep this blank!
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.mode7ypos dd 0 ; y position
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.tempb2 dd 0 ; keep this blank!
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.mode7yrpos dd 0 ; y position
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.tempb dd 0 ; keep this blank!
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.mode7xadder dd 0 ; number to add for x
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.tempc2 dd 0 ; keep this blank!
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.mode7xadd2 dd 0 ; number to add for x
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.tempc dd 0 ; keep this blank!
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.mode7yadder dd 0 ; number to add for y
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.tempd2 dd 0 ; keep this blank!
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.mode7yadd2 dd 0 ; number to add for y
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.tempd dd 0 ; keep this blank!
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.mode7ptr dd 0 ; pointer value
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.mode7xinc dd 0 ; number to add for x
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.mode7xincc dd 0 ; range check for x
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.mode7yinc dd 0 ; number to add for y
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.mode7xsloc dd 0 ; which screen x
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.mode7ysloc dd 0 ; which screen y
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.mode7xsrl dd 0 ; which relative screen x
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.mode7ysrl dd 0 ; which relative screen y
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.cxloc dw 0 ; cx location
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.cyloc dw 0 ; cy location
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.m7xaddofa dd 0
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.m7xaddof2a dd 0
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.m7yaddofa dd 0
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.m7yaddof2a dd 0
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.drawmode7win
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.domosaicw
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mov ebx,[.mode7xrpos]
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mov [mode7xrpos],ebx
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mov ebx,[.mode7yrpos]
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mov [mode7yrpos],ebx
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mov ebx,[.mode7xpos]
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mov [mode7xpos],ebx
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mov ebx,[.mode7ypos]
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mov [mode7ypos],ebx
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mov ebx,[.mode7xadder]
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mov [mode7xadder],ebx
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mov ebx,[.mode7yadder]
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mov [mode7yadder],ebx
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mov edi,[vram]
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Mode7Processngw Mode7Normal, domosaic, 1
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NEWSYM drawmode7winhr
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ProcessBuildWindow 0
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cmp byte[ngwinen],1
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jne .notwinen
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mov byte[mode7hr+ebx],0
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jmp drawmode7win.nohr
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.notwinen
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mov esi,[cwinptr]
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mov [winptrref],esi
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Mode7Calculate
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; esi = pointer to video buffer
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mov esi,[curvidoffset] ; esi = [vidbuffer] + curypos * 288 + 16
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mov [pesimpng],esi
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cmp byte[curmosaicsz],1
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je .nomosaic
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mov esi,xtravbuf+16
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mov ecx,64
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.clearnext
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mov dword[esi],0
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add esi,4
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dec ecx
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jnz .clearnext
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mov esi,xtravbuf+16
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.nomosaic
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; esi = pointer to video buffer
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; edi = pointer to vram
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; [.mode7xadder] = dword value to add to x value (decimal between 7 & 8bit)
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; [.mode7yadder] = dword value to add to y value (decimal between 7 & 8bit)
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; [.mode7xpos] = dword value of x position, decimal between 7 & 8bit
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; [.mode7xpos+1] = word value of x position
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; [.mode7ypos] = dword value of y position, decimal between 7 & 8bit
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; [.mode7ypos+1] = word value of y position
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xor ebx,ebx
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xor edx,edx
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xor ecx,ecx
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mov dword[.mode7xadd2],800h
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mov byte[.mode7xinc],2
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mov byte[.mode7xincc],0
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test dword[.mode7xadder],80000000h
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jz .noneg
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mov dword[.mode7xadd2],-800h
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mov byte[.mode7xinc],-2
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mov byte[.mode7xincc],0FEh
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.noneg
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mov dword[.mode7yadd2],800h
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mov byte[.mode7yinc],1
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test dword[.mode7yadder],80000000h
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jz .noneg2
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mov dword[.mode7yadd2],-800h
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mov byte[.mode7yinc],-1
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.noneg2
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sar dword[.mode7xadder],1
|
|
sar dword[.mode7yadder],1
|
|
|
|
mov edi,[vram]
|
|
cmp dword[.mode7xadder],7F0h
|
|
jg near .nextval3
|
|
cmp dword[.mode7xadder],-7F0h
|
|
jl near .nextval3
|
|
cmp dword[.mode7yadder],7F0h
|
|
jg near .nextval3
|
|
cmp dword[.mode7yadder],-7F0h
|
|
jl near .nextval3
|
|
Mode7Processhr Mode7Normal, domosaicng, 1
|
|
.nextval3
|
|
Mode7ProcessBhr Mode7Normal, domosaicng, 1
|
|
|
|
ALIGN32
|
|
.temp dd 0 ; for byte move left
|
|
.temp2 dd 0 ; for byte move left
|
|
.mode7xpos dd 0 ; x position
|
|
.tempa2 dd 0 ; keep this blank!
|
|
.mode7xrpos dd 0 ; x position
|
|
.tempa dd 0 ; keep this blank!
|
|
.mode7ypos dd 0 ; y position
|
|
.tempb2 dd 0 ; keep this blank!
|
|
.mode7yrpos dd 0 ; y position
|
|
.tempb dd 0 ; keep this blank!
|
|
.mode7xadder dd 0 ; number to add for x
|
|
.tempc2 dd 0 ; keep this blank!
|
|
.mode7xadd2 dd 0 ; number to add for x
|
|
.tempc dd 0 ; keep this blank!
|
|
.mode7yadder dd 0 ; number to add for y
|
|
.tempd2 dd 0 ; keep this blank!
|
|
.mode7yadd2 dd 0 ; number to add for y
|
|
.tempd dd 0 ; keep this blank!
|
|
.mode7ptr dd 0 ; pointer value
|
|
.mode7xinc dd 0 ; number to add for x
|
|
.mode7xincc dd 0 ; range check for x
|
|
.mode7yinc dd 0 ; number to add for y
|
|
.mode7xsloc dd 0 ; which screen x
|
|
.mode7ysloc dd 0 ; which screen y
|
|
.mode7xsrl dd 0 ; which relative screen x
|
|
.mode7ysrl dd 0 ; which relative screen y
|
|
.cxloc dw 0 ; cx location
|
|
.cyloc dw 0 ; cy location
|
|
.m7xaddofa dd 0
|
|
.m7xaddof2a dd 0
|
|
.m7yaddofa dd 0
|
|
.m7yaddof2a dd 0
|
|
|
|
NEWSYM drawmode7winBhr
|
|
ProcessBuildWindow 0
|
|
|
|
cmp byte[ngwinen],1
|
|
jne .notwinen
|
|
mov byte[mode7hr+ebx],0
|
|
jmp drawmode7winB.nohr
|
|
.notwinen
|
|
|
|
mov esi,[cwinptr]
|
|
mov [winptrref],esi
|
|
Mode7CalculateB
|
|
|
|
; esi = pointer to video buffer
|
|
mov esi,[curvidoffset] ; esi = [vidbuffer] + curypos * 288 + 16
|
|
cmp byte[curmosaicsz],1
|
|
je .nomosaic
|
|
mov esi,xtravbuf+16
|
|
mov ecx,64
|
|
.clearnext
|
|
mov dword[esi],0
|
|
add esi,4
|
|
dec ecx
|
|
jnz .clearnext
|
|
mov esi,xtravbuf+16
|
|
.nomosaic
|
|
|
|
; esi = pointer to video buffer
|
|
; edi = pointer to vram
|
|
; [.mode7xadder] = dword value to add to x value (decimal between 7 & 8bit)
|
|
; [.mode7yadder] = dword value to add to y value (decimal between 7 & 8bit)
|
|
; [.mode7xpos] = dword value of x position, decimal between 7 & 8bit
|
|
; [.mode7xpos+1] = word value of x position
|
|
; [.mode7ypos] = dword value of y position, decimal between 7 & 8bit
|
|
; [.mode7ypos+1] = word value of y position
|
|
xor ebx,ebx
|
|
xor edx,edx
|
|
xor ecx,ecx
|
|
mov dword[.mode7xadd2],800h
|
|
mov byte[.mode7xinc],2
|
|
mov byte[.mode7xincc],0
|
|
test dword[.mode7xadder],80000000h
|
|
jz .noneg
|
|
mov dword[.mode7xadd2],-800h
|
|
mov byte[.mode7xinc],-2
|
|
mov byte[.mode7xincc],0FEh
|
|
.noneg
|
|
mov dword[.mode7yadd2],800h
|
|
mov byte[.mode7yinc],1
|
|
test dword[.mode7yadder],80000000h
|
|
jz .noneg2
|
|
mov dword[.mode7yadd2],-800h
|
|
mov byte[.mode7yinc],-1
|
|
.noneg2
|
|
|
|
sar dword[.mode7xadder],1
|
|
sar dword[.mode7yadder],1
|
|
|
|
mov edi,[vram]
|
|
cmp dword[.mode7xadder],7F0h
|
|
jg near .nextval3
|
|
cmp dword[.mode7xadder],-7F0h
|
|
jl near .nextval3
|
|
cmp dword[.mode7yadder],7F0h
|
|
jg near .nextval3
|
|
cmp dword[.mode7yadder],-7F0h
|
|
jl near .nextval3
|
|
Mode7Processhr Mode7Normal, domosaic, 1
|
|
.nextval3
|
|
Mode7ProcessBhr Mode7Normal, domosaic, 1
|
|
|
|
ALIGN32
|
|
.temp dd 0 ; for byte move left
|
|
.temp2 dd 0 ; for byte move left
|
|
.mode7xpos dd 0 ; x position
|
|
.tempa2 dd 0 ; keep this blank!
|
|
.mode7xrpos dd 0 ; x position
|
|
.tempa dd 0 ; keep this blank!
|
|
.mode7ypos dd 0 ; y position
|
|
.tempb2 dd 0 ; keep this blank!
|
|
.mode7yrpos dd 0 ; y position
|
|
.tempb dd 0 ; keep this blank!
|
|
.mode7xadder dd 0 ; number to add for x
|
|
.tempc2 dd 0 ; keep this blank!
|
|
.mode7xadd2 dd 0 ; number to add for x
|
|
.tempc dd 0 ; keep this blank!
|
|
.mode7yadder dd 0 ; number to add for y
|
|
.tempd2 dd 0 ; keep this blank!
|
|
.mode7yadd2 dd 0 ; number to add for y
|
|
.tempd dd 0 ; keep this blank!
|
|
.mode7ptr dd 0 ; pointer value
|
|
.mode7xinc dd 0 ; number to add for x
|
|
.mode7xincc dd 0 ; range check for x
|
|
.mode7yinc dd 0 ; number to add for y
|
|
.mode7xsloc dd 0 ; which screen x
|
|
.mode7ysloc dd 0 ; which screen y
|
|
.mode7xsrl dd 0 ; which relative screen x
|
|
.mode7ysrl dd 0 ; which relative screen y
|
|
.cxloc dw 0 ; cx location
|
|
.cyloc dw 0 ; cy location
|
|
.m7xaddofa dd 0
|
|
.m7xaddof2a dd 0
|
|
.m7yaddofa dd 0
|
|
.m7yaddof2a dd 0
|
|
|
|
ALIGN32
|
|
NEWSYM ngwleft, dd 0 ; for byte move left
|
|
NEWSYM ngwleftb, dd 0 ; for byte move left
|
|
NEWSYM mode7xpos, dd 0,0 ; x position
|
|
NEWSYM mode7ypos, dd 0,0 ; x position
|
|
NEWSYM mode7xrpos, dd 0,0 ; x position, relative
|
|
NEWSYM mode7yrpos, dd 0,0 ; y position, relative
|
|
NEWSYM mode7xadder, dd 0,0 ; number to add for x
|
|
NEWSYM mode7yadder, dd 0,0 ; number to add for y
|
|
|
|
NEWSYM ProcessMode7ngwin
|
|
mov ecx,[ngcwinptr]
|
|
mov ecx,[ecx]
|
|
or ecx,ecx
|
|
jz near .winb
|
|
cmp ecx,[ngwleft]
|
|
jae .alldisplay
|
|
sub [ngwleft],ecx
|
|
mov dword[ngwleftb],ecx
|
|
xor ecx,ecx
|
|
mov eax,[mode7xrpos]
|
|
ret
|
|
.alldisplay
|
|
mov ecx,[ngwleft]
|
|
mov dword[ngwleftb],ecx
|
|
mov dword[ngwleft],0
|
|
xor ecx,ecx
|
|
mov eax,[mode7xrpos]
|
|
ret
|
|
.winb
|
|
NEWSYM ProcessMode7ngwinB
|
|
add dword[ngcwinptr],4
|
|
mov ecx,[ngcwinptr]
|
|
mov ecx,[ecx]
|
|
cmp ecx,[ngwleft]
|
|
jae near .finishmode7
|
|
sub [ngwleft],ecx
|
|
or ecx,ecx
|
|
jz .noclip
|
|
.nextvalngw
|
|
mov eax,[mode7xadder]
|
|
add [mode7xrpos],eax
|
|
mov eax,[mode7yadder]
|
|
sub [mode7yrpos],eax
|
|
inc esi
|
|
dec ecx
|
|
jnz near .nextvalngw
|
|
.noclip
|
|
add dword[ngcwinptr],4
|
|
jmp ProcessMode7ngwin
|
|
.finishmode7
|
|
mov dword[ngwleft],0
|
|
mov dword[ngwleftb],0
|
|
ret
|
|
|
|
NEWSYM ProcessMode7ngwinC
|
|
mov ecx,[ngcwinptr]
|
|
mov ecx,[ecx]
|
|
or ecx,ecx
|
|
jz near .winb
|
|
cmp ecx,[ngwleft]
|
|
jae .alldisplay
|
|
sub [ngwleft],ecx
|
|
mov dword[ngwleftb],ecx
|
|
xor ecx,ecx
|
|
mov eax,[mode7xpos]
|
|
ret
|
|
.alldisplay
|
|
mov ecx,[ngwleft]
|
|
mov dword[ngwleftb],ecx
|
|
mov dword[ngwleft],0
|
|
xor ecx,ecx
|
|
mov eax,[mode7xpos]
|
|
ret
|
|
.winb
|
|
NEWSYM ProcessMode7ngwinD
|
|
add dword[ngcwinptr],4
|
|
mov ecx,[ngcwinptr]
|
|
mov ecx,[ecx]
|
|
cmp ecx,[ngwleft]
|
|
jae near .finishmode7
|
|
sub [ngwleft],ecx
|
|
or ecx,ecx
|
|
jz .noclip
|
|
.nextvalngw
|
|
mov eax,[mode7xadder]
|
|
add [mode7xpos],eax
|
|
mov eax,[mode7yadder]
|
|
sub [mode7ypos],eax
|
|
inc esi
|
|
dec ecx
|
|
jnz near .nextvalngw
|
|
.noclip
|
|
add dword[ngcwinptr],4
|
|
jmp ProcessMode7ngwin
|
|
.finishmode7
|
|
mov dword[ngwleft],0
|
|
mov dword[ngwleftb],0
|
|
ret
|
|
|
|
%macro newvaluepred 2
|
|
mov dx,word[%1+ebx*4+8]
|
|
cmp dx,word[%1+ebx*4]
|
|
je %%nodivide
|
|
cmp byte[BGMA+ebx+2],7
|
|
je %%mode7scaleb
|
|
%%nodivide
|
|
movsx edx,word[%1+ebx*4+4]
|
|
movsx ecx,word[%1+ebx*4]
|
|
add ecx,edx
|
|
sar ecx,1
|
|
mov [%2],cx
|
|
jmp %%mode7scalend
|
|
%%mode7scaleb
|
|
mov esi,ebx
|
|
movsx ebx,word[%1+esi*4+8]
|
|
movsx edx,word[%1+esi*4]
|
|
sub ebx,edx
|
|
movsx ecx,word[%1+esi*4+4]
|
|
sub ecx,edx
|
|
mov eax,ecx
|
|
imul ecx
|
|
idiv ebx
|
|
add ax,word[%1+esi*4]
|
|
mov ebx,esi
|
|
mov [%2],ax
|
|
%%mode7scalend
|
|
%endmacro
|
|
|
|
NEWSYM processmode7hires
|
|
cmp byte[BGMA+ebx+1],7
|
|
jne near .nogo
|
|
|
|
push esi
|
|
push ebx
|
|
; predict new values
|
|
push eax
|
|
push edx
|
|
push ebx
|
|
push esi
|
|
newvaluepred mode7ab,mode7A
|
|
newvaluepred mode7ab+2,mode7B
|
|
newvaluepred mode7cd,mode7C
|
|
newvaluepred mode7cd+2,mode7D
|
|
pop esi
|
|
pop ebx
|
|
pop edx
|
|
pop eax
|
|
|
|
mov ecx,edx
|
|
xor edx,edx
|
|
mov dx,[BG1SXl+ebx*2+2]
|
|
add edx,ecx
|
|
shr edx,1
|
|
|
|
mov ecx,eax
|
|
mov eax,ebx
|
|
inc eax
|
|
test byte[mode7set],02h
|
|
jz .noflip
|
|
mov eax,261
|
|
sub eax,ebx
|
|
.noflip
|
|
add ax,[BG1SYl+ebx*2+2]
|
|
add eax,ecx
|
|
|
|
add esi,75036
|
|
mov [curvidoffset],esi
|
|
call drawmode7winB
|
|
pop ebx
|
|
pop esi
|
|
.nogo
|
|
ret
|
|
NEWSYM Mode7AsmEnd
|