193 lines
5.2 KiB
NASM
193 lines
5.2 KiB
NASM
;Copyright (C) 1997-2005 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
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;
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;http://www.zsnes.com
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;http://sourceforge.net/projects/zsnes
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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 curmosaicsz,curvidoffset,domosaic16b,winptrref,scaddset
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EXTSYM mode7A,mode7B,mode7C,mode7D,mode7X0,mode7Y0,mode7set
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EXTSYM pal16b,vram,vrama,winon,mode7tab,xtravbuf,drawmode7dcolor
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EXTSYM cwinptr
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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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ALIGN16
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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 ecx,[pal16b+edx*4]
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mov [esi],cx
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%%nodrawb
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add esi,2
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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 ecx,[pal16b+edx*4]
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mov [esi],cx
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%%nodrawbw
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add esi,2
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inc ebp
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%endmacro
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SECTION .text
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NEWSYM drawmode716b
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test byte[scaddset],1
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jnz near drawmode7dcolor
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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 edi,[vram]
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cmp byte[curmosaicsz],1
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je .nomosaic
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mov esi,xtravbuf+32
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mov ecx,128
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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+32
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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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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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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, domosaic16b, 2
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.nextval3
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Mode7ProcessB Mode7Normal, domosaic16b, 2
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ALIGN32
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SECTION .bss
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.temp resd 1 ; for byte move left
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.mode7xpos resd 1 ; x position
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.tempa2 resd 1 ; keep this blank!
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.mode7xrpos resd 1 ; x position
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.tempa resd 1 ; keep this blank!
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.mode7ypos resd 1 ; y position
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.tempb2 resd 1 ; keep this blank!
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.mode7yrpos resd 1 ; y position
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.tempb resd 1 ; keep this blank!
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.mode7xadder resd 1 ; number to add for x
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.tempc2 resd 1 ; keep this blank!
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.mode7xadd2 resd 1 ; number to add for x
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.tempc resd 1 ; keep this blank!
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.mode7yadder resd 1 ; number to add for y
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.tempd2 resd 1 ; keep this blank!
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.mode7yadd2 resd 1 ; number to add for y
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.tempd resd 1 ; keep this blank!
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.mode7ptr resd 1 ; pointer value
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.mode7xinc resd 1 ; number to add for x
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.mode7xincc resd 1 ; range check for x
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.mode7yinc resd 1 ; number to add for y
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.mode7xsloc resd 1 ; which screen x
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.mode7ysloc resd 1 ; which screen y
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.mode7xsrl resd 1 ; which relative screen x
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.mode7ysrl resd 1 ; which relative screen y
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.cxloc resw 1 ; cx location
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.cyloc resw 1 ; cy location
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.m7xaddofa resd 1
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.m7xaddof2a resd 1
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.m7yaddofa resd 1
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.m7yaddof2a resd 1
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SECTION .text
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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, domosaic16b, 2
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.nextval3w
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Mode7ProcessB Mode7Window, domosaic16b, 2
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