--- pwcview.c.orig	2016-07-13 19:32:26.638524000 +0900
+++ pwcview.c	2016-07-13 19:35:43.223649000 +0900
@@ -58,6 +58,9 @@
 #define SCALE_NONE 0
 #define SCALE_DOUBLE 1
 #define SCALE_FULL 2
+#define MAX_WIDTH 1600
+#define MAX_HEIGHT 1200
+
 int scale = SCALE_FULL;
 
 #ifndef NOGUI
@@ -865,7 +868,7 @@
 	}
 }
 
-uint8_t motionmask[60][80];
+uint8_t motionmask[MAX_HEIGHT/8][MAX_WIDTH/8];
 int detectmotion(unsigned char *buf, int width, int height)
 {
 	static int newbuf;
@@ -1032,8 +1035,8 @@
 		int ylast = (int)(event->button.y / divy);
 		int x, y;
 
-		for(y = ystart ;y >= 0 && y < 60 && y <= ylast; y++)
-			for(x = xstart; x >= 0 && x < 80 && x <= xlast; x++)
+		for(y = ystart ;y >= 0 && y < MAX_HEIGHT/8 && y <= ylast; y++)
+			for(x = xstart; x >= 0 && x < MAX_WIDTH/8 && x <= xlast; x++)
 				motionmask[y][x] = (event->button.button == SDL_BUTTON_LEFT) ? 1 : 0;
 		xstart = ystart = -1;
 	}
@@ -1044,6 +1047,9 @@
 #undef PSZ_MAX
 #endif
 #define PSZ_MAX 10
+/* with and heigt must be multible of 8*/
+
+
 struct {
 	char *name;
 	int width;
@@ -1271,7 +1277,7 @@
 	}
 	
 	if((fdmask = open("pwcview.msk",O_RDONLY)) != -1) {
-		read(fdmask,motionmask,60*80*sizeof(uint8_t));
+		read(fdmask,motionmask,MAX_WIDTH*MAX_HEIGHT/8/8*sizeof(uint8_t));
 		close(fdmask);
 		fprintf(stderr,"motion mask loaded\n");
 	}
@@ -1432,7 +1438,7 @@
 						break;
 					case SDLK_w:
 						if((fdmask = open("pwcview.msk",O_CREAT|O_TRUNC|O_WRONLY,0644)) != -1) {
-							write(fdmask,motionmask,60*80*sizeof(uint8_t));
+							write(fdmask,motionmask,MAX_WIDTH*MAX_HEIGHT/8/8*sizeof(uint8_t));
 							close(fdmask);
 							fprintf(stderr,"motion mask saved\n");
 						}
@@ -1483,7 +1489,7 @@
 				else if(event.type == SDL_MOUSEBUTTONDOWN) {
 					if(showmask) {
 						if(event.button.button == SDL_BUTTON_MIDDLE) 
-							memset(motionmask,0,60*80*sizeof(uint8_t));
+							memset(motionmask,0,MAX_WIDTH*MAX_HEIGHT/8/8*sizeof(uint8_t));
 						else
 							createmask(&event,&rect,vw.width,vw.height);
 					}