235 lines
5.9 KiB
NASM
235 lines
5.9 KiB
NASM
;Copyright (C) 1997-2001 ZSNES Team ( zsknight@zsnes.com / _demo_@zsnes.com )
|
|
;
|
|
;This program is free software; you can redistribute it and/or
|
|
;modify it under the terms of the GNU General Public License
|
|
;as published by the Free Software Foundation; either
|
|
;version 2 of the License, or (at your option) any later
|
|
;version.
|
|
;
|
|
;This program is distributed in the hope that it will be useful,
|
|
;but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;GNU General Public License for more details.
|
|
;
|
|
;You should have received a copy of the GNU General Public License
|
|
;along with this program; if not, write to the Free Software
|
|
;Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
%include "macros.mac"
|
|
|
|
EXTSYM curmosaicsz,curvidoffset,domosaic16b,winptrref,scaddset
|
|
EXTSYM mode7A,mode7B,mode7C,mode7D,mode7X0,mode7Y0,mode7set,cwinptr
|
|
EXTSYM pal16b,vram,vrama,winon,mode7tab,xtravbuf,dcolortab,vidbright
|
|
|
|
NEWSYM Mode716DAsmStart
|
|
%include "video/mode7.mac"
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NEWSYM Gendcolortable
|
|
; generate Direct Color Table
|
|
push eax
|
|
push edx
|
|
xor ecx,ecx
|
|
.loopdct
|
|
mov al,cl
|
|
and eax,00000111b
|
|
mov bl,[vidbright]
|
|
mul bl
|
|
mov bl,15
|
|
div bl
|
|
xor ah,ah
|
|
shl eax,13
|
|
mov edx,eax
|
|
mov al,cl
|
|
and eax,00111000b
|
|
shr eax,3
|
|
mov bl,[vidbright]
|
|
mul bl
|
|
mov bl,15
|
|
div bl
|
|
xor ah,ah
|
|
shl eax,8
|
|
or edx,eax
|
|
mov al,cl
|
|
and eax,11000000b
|
|
shr eax,6
|
|
mov bl,[vidbright]
|
|
mul bl
|
|
mov bl,15
|
|
div bl
|
|
xor ah,ah
|
|
shl eax,3
|
|
or edx,eax
|
|
and edx,0FFFFh
|
|
mov [dcolortab+ecx*4],edx
|
|
inc cl
|
|
jnz .loopdct
|
|
pop edx
|
|
pop eax
|
|
ret
|
|
|
|
%macro Mode7Normal 0
|
|
or dl,dl
|
|
jz %%nodrawb
|
|
mov ecx,[dcolortab+edx*4]
|
|
mov [esi],cx
|
|
%%nodrawb
|
|
add esi,2
|
|
%endmacro
|
|
|
|
%macro Mode7Window 0
|
|
or dl,dl
|
|
jz %%nodrawbw
|
|
test byte[ebp],0FFh
|
|
jnz %%nodrawbw
|
|
mov ecx,[dcolortab+edx*4]
|
|
mov [esi],cx
|
|
%%nodrawbw
|
|
add esi,2
|
|
inc ebp
|
|
%endmacro
|
|
|
|
;*******************************************************
|
|
; Processes & Draws Mode 7
|
|
;*******************************************************
|
|
NEWSYM prevbrightdc, db 0
|
|
NEWSYM drawmode7dcolor
|
|
mov bl,[vidbright]
|
|
cmp bl,[prevbrightdc]
|
|
je .nodcchange
|
|
mov [prevbrightdc],bl
|
|
call Gendcolortable
|
|
.nodcchange
|
|
mov esi,[cwinptr]
|
|
mov [winptrref],esi
|
|
|
|
Mode7Calculate
|
|
|
|
; esi = pointer to video buffer
|
|
mov esi,[curvidoffset] ; esi = [vidbuffer] + curypos * 288 + 16
|
|
mov edi,[vram]
|
|
|
|
cmp byte[curmosaicsz],1
|
|
je .nomosaic
|
|
mov esi,xtravbuf+32
|
|
mov ecx,128
|
|
.clearnext
|
|
mov dword[esi],0
|
|
add esi,4
|
|
dec ecx
|
|
jnz .clearnext
|
|
mov esi,xtravbuf+32
|
|
.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
|
|
|
|
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
|
|
|
|
cmp byte[curmosaicsz],1
|
|
jne .domosaic
|
|
cmp byte[winon],0
|
|
jne near .drawmode7win
|
|
.domosaic
|
|
|
|
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
|
|
Mode7Process Mode7Normal, domosaic16b, 2
|
|
.nextval3
|
|
Mode7ProcessB Mode7Normal, domosaic16b, 2
|
|
|
|
ALIGN32
|
|
.temp 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
|
|
|
|
.drawmode7win
|
|
.domosaicw
|
|
mov ebp,[cwinptr]
|
|
mov edi,[vram]
|
|
cmp dword[.mode7xadder],7F0h
|
|
jg near .nextval3w
|
|
cmp dword[.mode7xadder],-7F0h
|
|
jl near .nextval3w
|
|
cmp dword[.mode7yadder],7F0h
|
|
jg near .nextval3w
|
|
cmp dword[.mode7yadder],-7F0h
|
|
jl near .nextval3w
|
|
|
|
Mode7Process Mode7Window, domosaic16b, 2
|
|
.nextval3w
|
|
Mode7ProcessB Mode7Window, domosaic16b, 2
|
|
NEWSYM Mode716DAsmEnd
|