@@ 1,5 1,6 @@
 #include <u.h>
 #include <libc.h>
+#include <thread.h>
 #include "svm.h"
 
 int chatty;				// Verbose debug output


@@ 14,9 15,9 @@ usage(void)
 }
 
 void
-main(int argc, char *argv[])
+threadmain(int argc, char *argv[])
 {
-	uint width = 24;
+	uint width = 25;
 
 	ARGBEGIN{
 	case 'D':


@@ 54,5 55,5 @@ main(int argc, char *argv[])
 	
 	sleep(20000);
 
-	exits(nil);
+	threadexitsall(nil);
 }

@@ 1,16 1,25 @@
 #include <u.h>
 #include <libc.h>
+#include <thread.h>
 #include <draw.h>
 #include <keyboard.h>
 #include "svm.h"
 
-/* devdraw notes
+/* 
+
+== draw(3) notes 
 
 Global variables:
 
 - screen
 - display
 
+== event(2) notes
+
+Global functions to be called passively:
+
+- eresized()
+
 */
 
 /* draw a line through the middle of the window


@@ 27,6 36,13 @@ Global variables:
 #define BLACK	0xFFFFFFFF
 #define WHITE	0x000000FF
 
+// Represents a colored coordinate on the pixel grid
+typedef struct Coordinate Coordinate;
+struct Coordinate {
+	Point;
+	Image*		color;
+};
+
 // Single pixel images
 Image *black;
 Image *white;


@@ 37,6 53,7 @@ Screen	*scr;
 Image	*disp;
 uint	width;
 
+Channel *pixchan;	// For setting individual pixels on the screen
 
 // Resize the window to our screen size
 void


@@ 53,6 70,66 @@ resize(void)
 	close(fd);
 }
 
+// Manage and draw the screen passively
+void
+drawer(void *v)
+{
+	Channel *pixchan = (Channel*)v;
+	print("drawer start\n");
+
+	int y, x;
+	Image ***pixels;
+
+	pixels = calloc(width, sizeof (Image**));
+	for(y = 0; y < width; y++){
+		pixels[y] = calloc(width, sizeof (Image*));
+		for(x = 0; x < width; x++)
+			pixels[y][x] = bg;
+	}
+
+	Coordinate pix;
+
+	Alt alts[] = {
+		{pixchan, &pix, CHANRCV},
+		{nil, nil, CHANEND},
+	};
+
+	// Draw loop
+	for(;;){
+		// Check for new pixels
+
+		switch(alt(alts)){
+		case 0:
+			recv(pixchan, &pix);
+			pixels[pix.y][pix.x] = pix.color;
+			break;
+
+		// TODO - force draw chan?
+
+		default:
+			// TODO - sleep?
+			break;
+		}
+
+		// Draw all pixels
+		for(y = 0; y < width; y++)
+			for(x = 0; x < width; x++){
+				Point p = mulpt((Point){x, y}, scale);
+	
+				Point tl = addpt(screen->r.min, p);
+				Point br = addpt(tl, (Point){scale, scale});
+	
+				Rectangle r = (Rectangle){tl, br};
+
+				Image *c = pixels[y][x];
+
+				draw(disp, r, c, nil, p);
+				flushimage(screen->display, 0);
+			}
+
+		sleep(1);
+	}
+}
 
 // Init rio window
 void


@@ 63,13 140,14 @@ startgui(uint w)
 	resize();
 
 	if(initdraw(nil, nil, "smolvm") < 0)
-		sysfatal("initdraw: %r");
-
+		sysfatal("err: could not initdraw - %r");
 
+	// Allocate images for later use
 	bg = allocimage(display, Rect(0, 0, 1, 1), screen->chan, 1, BGCOLOR);
 	black = allocimage(display, Rect(0, 0, 1, 1), screen->chan, 1, BLACK);
 	white = allocimage(display, Rect(0, 0, 1, 1), screen->chan, 1, WHITE);
 	
+	// Initialize and draw out the rio window
 	scr = allocscreen(screen, bg, 0);
 	
 	disp = allocwindow(scr, screen->r, 0, BGCOLOR);


@@ 77,6 155,11 @@ startgui(uint w)
 	draw(screen, screen->r, bg, nil, ZP);
 	
 	flushimage(display, 1);
+
+	pixchan = chancreate(sizeof (Coordinate), 0);
+	proccreate(drawer, pixchan, 4096);
+
+	return;
 }
 
 


@@ 90,18 173,22 @@ drawpx(uint x, uint y, int on)
 	Image *c = white;
 	if(on)
 		c = black;
-		
-	Point p = mulpt((Point){x, y}, scale);
-	
-	//int winheight = screen->r.max.y - screen->r.min.y;
-	//int winwidth = screen->r.max.x - screen->r.min.x;
-	
-	Point tl = addpt(screen->r.min, p);
-	Point br = addpt(tl, (Point){scale, scale});
-	
-	Rectangle r = (Rectangle){tl, br};
+
+	Coordinate *pix = calloc(1, sizeof (Coordinate));
+	*pix = (Coordinate){(Point){x,y}, c};
+
+	send(pixchan, pix);
+}
+
+// Called by event(2) on screen resize events
+void
+eresized(int new)
+{
+	if(new && getwindow(display, Refnone) < 0)
+		sysfatal("err: can't reattach to window after resize - %r");
 	
-	draw(disp, r, c, nil, p);
+	// TODO - draw the screen forcefully
 	
-	flushimage(screen->display, 0);
-}>
\ No newline at end of file
+	//flushimage(screen->display, 0);
+	resize();
+}