Brew Interview Question:

How to draw a line in a specific color?

Submitted by: Administrator

IDISPLAY_DrawHLine() and IDISPLAY_DrawVLine() always draw lines in black. Therefore setting CLR_USER_LINE to the desired color and then invoking IDISPLAY_DrawHLine() or IDISPLAY_DrawVLine() will not work.

The definitions of these two IDISPLAY macros are below. To draw a line in a color other than black, use the code contained in the macro definition and change to the desired fill color.

#define IDISPLAY_DrawHLine(p,x,y,len)
{AEERect rc;SETAEERECT(&rc,(x),(y),(len),1); IDISPLAY_FillRect((p),&rc,
RGB_BLACK);}


#define IDISPLAY_DrawVLine(p,x,y,len)
{AEERect rc;SETAEERECT(&rc,(x),(y),1,(len)); IDISPLAY_FillRect((p),&rc,
RGB_BLACK);}
Submitted by: Administrator