mirror of
https://github.com/ondra-novak/gates_of_skeldal.git
synced 2025-07-13 01:41:59 -04:00
318 lines
7.2 KiB
NASM
318 lines
7.2 KiB
NASM
.model small
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.386
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;16 bit line (de)comprimator
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;
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DGROUP group _DATA
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extern _anim_line_len:dword
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_TEXT segment byte public 'CODE' use32
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assume CS:_TEXT
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assume DS:DGROUP
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save_line1 macro reg1,reg2
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shr reg1,8
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rcr reg2,1
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shr reg1,8
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rcr reg2,1
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shr reg1,8
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rcr reg2,1
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shr reg1,8
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rcr reg2,1
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endm
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save_linex macro reg1,reg2,rols
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shrd reg2,reg1,rols
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shr reg1,8
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shrd reg2,reg1,rols
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shr reg1,8
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shrd reg2,reg1,rols
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shr reg1,8
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shrd reg2,reg1,rols
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endm
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public save_1bit_ ;ESI source
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;EDI target
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;vraci EDI ukazatel na konce;
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save_1bit_:
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mov cl,8
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s1b1: lodsd
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save_linex eax,ebx,1
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dec cl
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jnz s1b1
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mov eax,ebx
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stosd
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mov cl,8
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s1b2: lodsd
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save_linex eax,ebx,1
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dec cl
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jnz s1b2
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mov eax,ebx
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stosd
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ret
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public save_2bit_
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save_2bit_:
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mov ch,4
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c2b11: mov cl,4
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c2b12: lodsd
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save_linex eax,ebx,2
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dec cl
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jnz c2b12
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mov eax,ebx
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stosd
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dec ch
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jnz c2b11
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ret
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public save_3bit_
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save_3bit_:
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mov ch,8
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c3b11: mov cl,2
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c3b12: lodsd
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save_linex eax,ebx,3
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dec cl
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jnz c3b12
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mov eax,ebx
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shr eax,8
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stosd
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dec edi
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dec ch
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jnz c3b11
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ret
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public save_4bit_
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save_4bit_:
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mov ch,8
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c4b11: mov cl,2
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c4b12: lodsd
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save_linex eax,ebx,4
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dec cl
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jnz c4b12
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mov eax,ebx
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stosd
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dec ch
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jnz c4b11
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ret
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public load_1bit_ ;ESI - Source
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;EDI - Target
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;EBX - Palette
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;anim_line_len - delka radky
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load_1bit_ :
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mov ch,8
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l1b1: mov dl,[esi]
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inc esi
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mov cl,8
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l1b2: movzx eax,dl
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and eax,1
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mov eax,[ebx+eax*2]
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test eax,8000h
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jnz short l1b1s
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mov [edi],ax
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l1b1s: add edi,2
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shr dl,1
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dec cl
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jnz l1b2
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mov eax,_anim_line_len
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sub eax,16
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add edi,eax
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dec ch
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jnz l1b1
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ret
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public load_2bit_ ;ESI - Source
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;EDI - Target
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;EBX - Palette
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;anim_line_len - delka radky
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load_2bit_:
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mov ch,8
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l2b1: mov dx,[esi]
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add esi,2
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mov cl,8
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l2b2: mov eax,edx
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and eax,3
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mov eax,[ebx+eax*2]
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test eax,8000h
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jnz short l2b1s
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mov [edi],ax
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l2b1s: add edi,2
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shr edx,2
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dec cl
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jnz l2b2
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mov eax,_anim_line_len
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sub eax,16
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add edi,eax
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dec ch
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jnz l2b1
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ret
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public load_3bit_ ;ESI - Source
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;EDI - Target
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;EBX - Palette
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;anim_line_len - delka radky
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load_3bit_:
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mov ch,8
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l3b1: mov edx,[esi]
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add esi,3
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mov cl,8
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l3b2: mov eax,edx
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and eax,7
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mov eax,[ebx+eax*2]
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test eax,8000h
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jnz short l3b1s
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mov [edi],ax
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l3b1s: add edi,2
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shr edx,3
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dec cl
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jnz l3b2
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mov eax,_anim_line_len
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sub eax,16
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add edi,eax
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dec ch
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jnz l3b1
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ret
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public load_4bit_ ;ESI - Source
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;EDI - Target
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;EBX - Palette
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;anim_line_len - delka radky
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load_4bit_:
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mov ch,8
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l4b1: mov edx,[esi]
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add esi,4
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mov cl,8
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l4b2: mov eax,edx
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and eax,15
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mov eax,[ebx+eax*2]
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test eax,8000h
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jnz short l4b1s
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mov [edi],ax
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l4b1s: add edi,2
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shr edx,4
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dec cl
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jnz l4b2
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mov eax,_anim_line_len
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sub eax,16
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add edi,eax
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dec ch
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jnz l4b1
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ret
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public load_8bit_ ;ESI - Source
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;EDI - Target
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;EBX - Palette
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;anim_line_len - delka radky
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load_8bit_:
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mov ch,8
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l8b1: mov cl,8
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l8b2: lodsb
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movzx eax,al
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mov eax,[ebx+eax*2]
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test eax,8000h
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jnz short l8b1s
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mov [edi],ax
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l8b1s: add edi,2
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dec cl
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jnz l8b2
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mov eax,_anim_line_len
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sub eax,16
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add edi,eax
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dec ch
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jnz l8b1
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ret
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public load_0bit_ ;EDI - Target
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;EBX - Palette
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;anim_line_len - delka radky
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load_0bit_:
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movzx eax,word ptr[ebx]
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test eax,8000h
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jnz l0b1s
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mov ebx,eax
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shl ebx,16
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or eax,ebx
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mov ch,8
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l0b1: mov cl,4
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l0b2: stosd
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dec cl
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jnz l0b2
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mov edx,_anim_line_len
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sub edx,16
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add edi,edx
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dec ch
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jnz l0b1
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l0b1s: ret
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public display_interlaced_fused_lfb_
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;ESI buffer1
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;EBX buffer2
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;EDI screen
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;vezme buffer 1 a sfuzuje s bufferem 2, predtim ovsem prepise buffer2 bufferem 1
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;pracuje s lfb
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display_interlaced_fused_lfb_:
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mov ecx,180
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dif_lp1:push ecx
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mov ecx,320
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dif_lp2:lodsd
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mov edx,eax
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xchg edx,[ebx]
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and eax,7bde7bdeh
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and edx,7bde7bdeh
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add eax,edx
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shr eax,1
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stosd
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add ebx,4
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dec ecx
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jnz dif_lp2
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pop ecx
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add edi,1280
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dec ecx
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jnz dif_lp1
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ret
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extern mapvesaadr_:near
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public display_interlaced_fused_bank_
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;ESI buffer1
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;EBX buffer2
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;EDI screen
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;vezme buffer 1 a sfuzuje s bufferem 2, predtim ovsem prepise buffer2 bufferem 1
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;pracuje s lfb
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display_interlaced_fused_bank_:
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mov ecx,180
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difblp1:push ecx
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push edi
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call mapvesaadr_
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mov ecx,320
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difblp2:lodsd
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mov edx,eax
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xchg edx,[ebx]
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and eax,7bde7bdeh
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and edx,7bde7bdeh
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add eax,edx
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shr eax,1
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stosd
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add ebx,4
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dec ecx
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jnz difblp2
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pop edi
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pop ecx
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add edi,4096
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dec ecx
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jnz difblp1
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ret
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_TEXT ends
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end
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