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- /* $VER: WBStars_functions.c 2.0b4 (28 May 1996)
- */
-
- #include <proto/graphics.h>
- #include <proto/layers.h>
-
- #include "WBStars_include.h"
- #include "WBStars_protos.h"
- #include "WBStars_plot.h"
-
- int SetPixel(int x, int y, char force)
- {
- ULONG APen; /* because this is not "our" RastPort */
- ULONG BPen; /* we have to save the things that we */
- ULONG DrMd; /* will change to write the Pixel */
- char color;
-
- if(!locked) LockLayerInfo(LInfo);
-
- color=ReadPixel(RPort,x+minx,y+miny);
-
- if( force || color==bg_color )
- {
- APen = GetAPen(RPort); /* get the Pens and */
- BPen = GetBPen(RPort); /* the DrawMode */
- DrMd = GetDrMd(RPort);
-
- SetABPenDrMd(RPort, fg_color, BPen, JAM1); /* set our Pens and DrawMode */
- WritePixel(RPort,x+minx,y+miny); /* Write our Pixel */
-
- SetABPenDrMd(RPort, APen, BPen, DrMd); /* Reset the Rastport */
-
- if(!locked) UnlockLayerInfo(LInfo);
-
- return (int)color;
- }
-
- if(!locked) UnlockLayerInfo(LInfo);
-
- return -1;
- }
-
- char ClearPixel(int x, int y, char color)
- {
- ULONG APen;
- ULONG BPen;
- ULONG DrMd;
-
- if(!locked) LockLayerInfo(LInfo);
-
- if( ReadPixel(RPort,x+minx,y+miny)==fg_color )
- {
- APen = GetAPen(RPort);
- BPen = GetBPen(RPort);
- DrMd = GetDrMd(RPort);
-
- SetABPenDrMd(RPort, color, BPen, JAM1);
- WritePixel(RPort,x+minx,y+miny);
-
- SetABPenDrMd(RPort, APen, BPen, DrMd);
-
- if(!locked) UnlockLayerInfo(LInfo);
-
- return TRUE;
- }
-
- if(!locked) UnlockLayerInfo(LInfo);
-
- return FALSE;
- }
-
- char Test1Pixel(int x, int y)
- {
- if( ReadPixel(RPort,x+minx,y+miny)==fg_color )
- {
- return TRUE;
- }
-
- return FALSE;
- }
-
- void LockPlotArea()
- {
- if(!locked)
- {
- LockLayerInfo(LInfo);
- locked=TRUE;
- }
- }
-
- void UnlockPlotArea()
- {
- if(locked)
- {
- UnlockLayerInfo(LInfo);
- locked=FALSE;
- }
- }
-