mirror of https://github.com/nmlgc/ReC98.git
202 lines
3.1 KiB
NASM
202 lines
3.1 KiB
NASM
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; master library - graphic - packedpixel - put - hline - 8dot - PC98V
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;
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; Description:
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; Copy of graph_pack_put_8() that does not clip the Y coordinate to
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; ClipYH and ClipYT.
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;
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; Function/Procedures:
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; void graph_pack_put_8_noclip( int x, int y, void far * linepat, int len ) ;
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;
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; Parameters:
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; x 描画開始 x 座標( 0〜639, ただし8ドット単位に切り捨て )
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; y 描画 y 座標( 0 〜 399(※400ライン表示のとき)
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; linepat パターンデータの先頭アドレス
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; len パターンデータの横ドット数
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; ただし実際には8dot単位に切り詰めます。
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;
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; Returns:
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; none
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;
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; Binding Target:
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; Microsoft-C / Turbo-C / Turbo Pascal
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;
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; Running Target:
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; PC-9801V
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;
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; Requiring Resources:
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; CPU: V30
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;
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; Notes:
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; クリッピングは縦方向だけ gc_poly 相当の処理を行っています。
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; 横は画面幅でクリッピングできます。
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;
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; Assembly Language Note:
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;
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;
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; Compiler/Assembler:
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; TASM 3.0
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; OPTASM 1.6
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;
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; Author:
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; 恋塚昭彦
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; ZUN
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;
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; Revision History:
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; (see graph_pack_put_8)
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SCREEN_XBYTE equ 80
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USE_GRCG = 0 ; 1にするとGRCGを使うが少し遅くなる(RA21+VMM386)
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USE_TABLE = 1
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ROTATE macro wreg,lh,ll
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rept 2
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rol wreg,1
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RCL DH,1
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rol wreg,1
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RCL DL,1
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rol wreg,1
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RCL lh,1
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rol wreg,1
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RCL ll,1
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endm
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endm
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GC_MODEREG equ 7ch
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GC_TILEREG equ 7eh
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MRETURN macro
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pop DI
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pop SI
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pop BP
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ret 5*2
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EVEN
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endm
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retfunc GRPPP8NC_CLIPOUT
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MRETURN
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endfunc
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func GRAPH_PACK_PUT_8_NOCLIP ; graph_pack_put_8_noclip() {
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push BP
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mov BP,SP
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push SI
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push DI
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; 引数
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@@x = (RETSIZE+5)*2
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@@y = (RETSIZE+4)*2
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@@linepat = (RETSIZE+2)*2
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@@len = (RETSIZE+1)*2
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mov AX,[BP+@@y]
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mov CX,[BP+@@len]
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sar CX,3 ; 8dot単位に切り捨てる
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jle short GRPPP8NC_CLIPOUT
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mov SI,[BP+@@linepat]
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mov DI,[BP+@@x]
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sar DI,3 ; xを8ドット単位に補正
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jns short @@XNORMAL
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add CX,DI
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jle short GRPPP8NC_CLIPOUT
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shl DI,2
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add SI,DI
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xor DI,DI
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@@XNORMAL:
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cmp DI,SCREEN_XBYTE
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jge short GRPPP8NC_CLIPOUT
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add CX,DI
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cmp CX,SCREEN_XBYTE
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jl short @@RIGHTCLIPPED
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mov CX,SCREEN_XBYTE
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@@RIGHTCLIPPED:
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sub CX,DI
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imul AX,AX,SCREEN_XBYTE
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add DI,AX ; DI = draw address
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IF USE_GRCG
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pushf
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CLI
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mov AL,80h ; GC_TDW
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out GC_MODEREG,AL
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popf
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ENDIF
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; 描画開始
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push DS
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mov ES,ClipYT_seg
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mov DS,[BP+@@linepat+2]
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mov BP,CX
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CLD
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EVEN
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@@XLOOP:
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IF USE_TABLE
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mov CL,2
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mov BL,[SI]
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mov BH,0
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shl BX,CL
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mov AX,word ptr CS:RotTbl[BX]
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mov DX,word ptr CS:RotTbl[BX+2]
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inc SI
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REPT 3
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shl AX,CL
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shl DX,CL
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mov BL,[SI]
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mov BH,0
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shl BX,CL
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or AX,word ptr CS:RotTbl[BX]
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or DX,word ptr CS:RotTbl[BX+2]
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inc SI
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ENDM
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ELSE
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mov CX,2
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@@LOOP8:
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lodsw
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ROTATE AL,BH,BL
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ROTATE AH,BH,BL
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loop short @@LOOP8
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mov AX,BX
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ENDIF
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IF USE_GRCG
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out GC_TILEREG,AL
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mov AL,AH
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out GC_TILEREG,AL
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mov AX,DX
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out GC_TILEREG,AL
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mov AL,AH
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out GC_TILEREG,AL
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stosb
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ELSE
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mov ES:[DI],AL ; 0a800h
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mov BX,ES
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mov ES:[DI+8000h],AH ; 0b000h
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add BH,10h
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mov ES,BX
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mov ES:[DI],DL ; 0b800h
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add BH,28h
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mov ES,BX
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mov ES:[DI],DH ; 0e000h
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sub BH,38h
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mov ES,BX
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inc DI
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ENDIF
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dec BP
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jnz short @@XLOOP
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pop DS
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IF USE_GRCG
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mov AL,0
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out GC_MODEREG,AL
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ENDIF
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MRETURN
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endfunc ; }
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