mirror of https://github.com/nmlgc/ReC98.git
137 lines
1.9 KiB
NASM
137 lines
1.9 KiB
NASM
|
; master library - PC-9801 - grcg - boxfill
|
||
|
|
;
|
||
|
|
; Description:
|
||
|
|
; 横8dot単位の長方形塗り潰し
|
||
|
|
;
|
||
|
|
; Function/Procedures:
|
||
|
|
; void grcg_byteboxfill_x( int x1, int y1, int x2, int y2 ) ;
|
||
|
|
;
|
||
|
|
; Parameters:
|
||
|
|
; x1,y1 左上頂点 (x座標は0〜79, y座標は0〜400)
|
||
|
|
; x2,y2 右下頂点
|
||
|
|
;
|
||
|
|
; Returns:
|
||
|
|
; none
|
||
|
|
;
|
||
|
|
; Binding Target:
|
||
|
|
; Microsoft-C / Turbo-C / Turbo Pascal
|
||
|
|
;
|
||
|
|
; Running Target:
|
||
|
|
; PC-9801V
|
||
|
|
;
|
||
|
|
; Requiring Resources:
|
||
|
|
; CPU: V30
|
||
|
|
; GRCG
|
||
|
|
;
|
||
|
|
; Notes:
|
||
|
|
; x1 <= x2, y1 <= y2 でなければ描画しません。
|
||
|
|
; クリッピングは縦方向のみ行っています。
|
||
|
|
;
|
||
|
|
; Assembly Language Note:
|
||
|
|
;
|
||
|
|
;
|
||
|
|
; Compiler/Assembler:
|
||
|
|
; TASM 3.0
|
||
|
|
; OPTASM 1.6
|
||
|
|
;
|
||
|
|
; Author:
|
||
|
|
; 恋塚昭彦
|
||
|
|
;
|
||
|
|
; Revision History:
|
||
|
|
; 93/ 5/ 4 Initial:gc_byteb.asm/master.lib 0.16
|
||
|
|
; 93/ 5/30 [M0.18] bugfix(^^; thanks >iR
|
||
|
|
|
||
|
|
MRETURN macro
|
||
|
|
pop DI
|
||
|
|
ret 8
|
||
|
|
EVEN
|
||
|
|
endm
|
||
|
|
|
||
|
|
func GRCG_BYTEBOXFILL_X ; grcg_byteboxfill_x() {
|
||
|
|
push DI
|
||
|
|
mov DI,SP
|
||
|
|
; 引数
|
||
|
|
x1 = (RETSIZE+4)*2
|
||
|
|
y1 = (RETSIZE+3)*2
|
||
|
|
x2 = (RETSIZE+2)*2
|
||
|
|
y2 = (RETSIZE+1)*2
|
||
|
|
|
||
|
|
mov AX,ClipYT
|
||
|
|
mov CX,AX
|
||
|
|
mov BX,SS:[DI+y1]
|
||
|
|
sub BX,AX
|
||
|
|
jg short @@S1
|
||
|
|
xor BX,BX
|
||
|
|
@@S1:
|
||
|
|
mov AX,BX
|
||
|
|
shl AX,2
|
||
|
|
add AX,BX
|
||
|
|
add AX,ClipYT_seg
|
||
|
|
mov ES,AX
|
||
|
|
|
||
|
|
mov AX,ClipYH
|
||
|
|
mov DX,SS:[DI+y2]
|
||
|
|
sub DX,CX
|
||
|
|
cmp DX,AX
|
||
|
|
jl short @@S2
|
||
|
|
mov DX,AX
|
||
|
|
@@S2:
|
||
|
|
sub DX,BX ; (DX = ylen)
|
||
|
|
jl short @@OWARI
|
||
|
|
|
||
|
|
mov AX,SS:[DI+x1]
|
||
|
|
mov BX,SS:[DI+x2]
|
||
|
|
sub BX,AX ; BX = xlen
|
||
|
|
jl short @@OWARI
|
||
|
|
inc BX
|
||
|
|
|
||
|
|
mov DI,DX
|
||
|
|
shl DI,2
|
||
|
|
add DI,DX
|
||
|
|
shl DI,4
|
||
|
|
add DI,AX ; DI = ylen * 80 + x1
|
||
|
|
|
||
|
|
lea DX,[BX+80] ; DX = xsub
|
||
|
|
mov AX,0ffffh
|
||
|
|
|
||
|
|
test DI,1
|
||
|
|
jnz short @@OA
|
||
|
|
shr BX,1
|
||
|
|
jc short @@EAOL
|
||
|
|
EVEN
|
||
|
|
@@EAEL:
|
||
|
|
mov CX,BX
|
||
|
|
rep stosw
|
||
|
|
sub DI,DX
|
||
|
|
jnb short @@EAEL
|
||
|
|
@@OWARI:
|
||
|
|
MRETURN
|
||
|
|
@@EAOL:
|
||
|
|
mov CX,BX
|
||
|
|
rep stosw
|
||
|
|
stosb
|
||
|
|
sub DI,DX
|
||
|
|
jnb short @@EAOL
|
||
|
|
MRETURN
|
||
|
|
@@OA:
|
||
|
|
shr BX,1
|
||
|
|
jc short @@OAOL
|
||
|
|
dec BX
|
||
|
|
EVEN
|
||
|
|
@@OAEL:
|
||
|
|
mov CX,BX
|
||
|
|
stosb
|
||
|
|
rep stosw
|
||
|
|
stosb
|
||
|
|
sub DI,DX
|
||
|
|
jnb short @@OAEL
|
||
|
|
MRETURN
|
||
|
|
@@OAOL:
|
||
|
|
mov CX,BX
|
||
|
|
stosb
|
||
|
|
rep stosw
|
||
|
|
sub DI,DX
|
||
|
|
jnb short @@OAOL
|
||
|
|
MRETURN
|
||
|
|
endfunc ; }
|