汇编语言（十）画点+画线+画矩形+画三角形

备战本校汇编语言竞赛，先练练画图。

• 设置屏幕显示模式

MOV AH,0
MOV AL,12H  ;640*480*16
INT 10H

• 画点宏

;########画细点宏########
;参数：页面、Y坐标、X坐标、颜色，通过将AH放入0CH,通过10H中断来描点
;0黑色 1蓝色 2绿色 3青色 4红色 5紫色 6橙色 7白色 8灰色
POINT_THIN MACRO PAGE,ROW,COLUMN,COLOR
	PUSH AX
	PUSH BX
	PUSH CX
	PUSH DX
	MOV AH,0CH
	MOV AL,COLOR
	MOV BH,PAGE
	MOV DX,ROW
	MOV CX,COLUMN
	INT 10H
	POP DX
	POP CX
	POP BX
	POP AX
ENDM 

;########画横线宏，参数：X坐标、Y坐标、长度、颜色
DRAWLINE1 MACRO COLUMN,ROW,FREE_LENGTH,COLOR
		LOCAL LIN1 
	PUSH CX
	PUSH SI
	MOV  CX,FREE_LENGTH
	MOV  SI,COLUMN
LIN1:
	POINT_THIN 0,ROW,SI,COLOR
	INC  SI
	LOOP LIN1
	POP  SI
	POP  CX
ENDM

 

• 画任意两点间线宏

;画任意两点间线宏。参数：起点X、起点Y、终点X、终点Y、颜色
LINE MACRO X1,Y1,X2,Y2,COLOR
     LOCAL EXIT
     LOCAL LINEZHENG,LINEFUN
     LOCAL LINEZHENGZHENG,LINEZHENGFUN
     LOCAL LINEFUNZHENG,LINEFUNFUN
     LOCAL LINE1,LINE2,LINE3
     LOCAL LINE11,LINE12,LINE13
     LOCAL LINE21,LINE22,LINE23
     LOCAL LINE31,LINE32,LINE33
     PUSH AX
     PUSH BX
     PUSH CX
     PUSH DX
     PUSH SI
     PUSH DI
     MOV SI,0
     MOV DI,0
     MOV AX,X1
     MOV BX,X2
     MOV CX,Y1
     MOV DX,Y2
     CMP AX,BX
     JA LINEFUN
LINEZHENG:
     CMP CX,DX
     JA  LINEZHENGFUN
LINEZHENGZHENG:
     MOV AH,0CH
     MOV AL,COLOR
     MOV BH,0
     MOV CX,X1
     MOV DX,Y1
LINE1:ADD SI,(Y2-Y1)
      CMP SI,(X2-X1)
      JBE LINE2
      SUB SI,(X2-X1)
      INC DX
LINE2:ADD DI,(X2-X1)
      CMP DI,(Y2-Y1)
      JBE LINE3
      SUB DI,(Y2-Y1)
      INC CX
LINE3:INT 10H
      CMP CX,X2
      JB LINE1
      LEA BX,EXIT
      JMP BX
LINEZHENGFUN:
     MOV AH,0CH
     MOV AL,COLOR
     MOV BH,0
     MOV CX,X1
     MOV DX,Y1
LINE11:ADD SI,(Y1-Y2)
      CMP SI,(X2-X1)
      JBE LINE12
      SUB SI,(X2-X1)
      DEC DX
LINE12:ADD DI,(X2-X1)
      CMP DI,(Y1-Y2)
      JBE LINE13
      SUB DI,(Y1-Y2)
      INC CX
LINE13:INT 10H
      CMP CX,X2
      JB LINE11
      LEA BX,EXIT
      JMP BX
LINEFUN:
       MOV CX,Y1
       MOV DX,Y2
       CMP CX,DX
       JA LINEFUNFUN
LINEFUNZHENG:
       MOV AH,0CH
       MOV AL,COLOR
       MOV BH,0
       MOV CX,X1
       MOV DX,Y1
LINE21:
       ADD SI,(Y2-Y1)
       CMP SI,(X1-X2)
       JBE LINE22
       SUB SI,(X1-X2)
       INC DX
LINE22:ADD DI,(X1-X2)
       CMP DI,(Y2-Y1)
       JBE LINE23
       SUB DI,(Y2-Y1)
       DEC CX
LINE23:INT 10H
       CMP CX,X2
       JA LINE21
       JMP EXIT
LINEFUNFUN:
       MOV CX,X1
       MOV DX,Y1
       MOV AH,0CH
       MOV AL,COLOR
       MOV BH,0
LINE31:ADD SI,(Y1-Y2)
       CMP SI,(X1-X2)
       JBE LINE32
       SUB SI,(X1-X2)
       DEC DX
LINE32:ADD DI,(X1-X2)
       CMP DI,(Y1-Y2)
       JBE LINE33
       SUB DI,(Y1-Y2)
       DEC CX
LINE33:INT 10H
       CMP CX,X2
       JA LINE31
EXIT:
     POP DI
     POP SI
     POP DX
     POP CX
     POP BX
     POP AX
ENDM