new draw server

src/cmd/devdraw/drawclient.c

@@ -0,0 +1,128 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <draw.h>
+#include <mouse.h>
+#include <cursor.h>
+#include <drawsrv.h>
+
+typedef struct Cmd Cmd;
+struct Cmd {
+	char *cmd;
+	void	(*fn)(int, char**);
+};
+
+Biobuf b;
+int fd;
+uchar buf[64*1024];
+
+void
+startsrv(void)
+{
+	int pid, p[2];
+	
+	if(pipe(p) < 0)
+		sysfatal("pipe");
+	if((pid=fork()) < 0)
+		sysfatal("fork");
+	if(pid == 0){
+		close(p[0]);
+		dup(p[1], 0);
+		dup(p[1], 1);
+		execl("o.drawsrv", "o.drawsrv", "-D", nil);
+		sysfatal("exec: %r");
+	}
+	close(p[1]);
+	fd = p[0];
+}
+
+int
+domsg(Wsysmsg *m)
+{
+	int n, nn;
+
+	n = convW2M(m, buf, sizeof buf);
+fprint(2, "write %d to %d\n", n, fd);
+	write(fd, buf, n);
+	n = readwsysmsg(fd, buf, sizeof buf);
+	nn = convM2W(buf, n, m);
+	assert(nn == n);
+	if(m->op == Rerror)
+		return -1;
+	return 0;
+}
+
+void
+cmdinit(int argc, char **argv)
+{
+	Wsysmsg m;
+	
+	memset(&m, 0, sizeof m);
+	m.op = Tinit;
+	m.winsize = "100x100";
+	m.label = "label";
+	m.font = "";
+	if(domsg(&m) < 0)
+		sysfatal("domsg");
+}
+
+void
+cmdmouse(int argc, char **argv)
+{
+	Wsysmsg m;
+	
+	memset(&m, 0, sizeof m);
+	m.op = Trdmouse;
+	if(domsg(&m) < 0)
+		sysfatal("domsg");
+	print("%c %d %d %d\n",
+		m.resized ? 'r' : 'm',
+		m.mouse.xy.x,
+		m.mouse.xy.y,
+		m.mouse.buttons);
+}
+
+void
+cmdkbd(int argc, char **argv)
+{
+	Wsysmsg m;
+	
+	memset(&m, 0, sizeof m);
+	m.op = Trdkbd;
+	if(domsg(&m) < 0)
+		sysfatal("domsg");
+	print("%s\n", m.runes);
+}
+
+Cmd cmdtab[] = {
+	{ "init", cmdinit, },
+	{ "mouse", cmdmouse, },
+	{ "kbd", cmdkbd, },
+};
+
+void
+main(int argc, char **argv)
+{
+	char *p, *f[20];
+	int i, nf;
+
+	startsrv();
+
+fprint(2, "started...\n");
+	Binit(&b, 0, OREAD);
+	while((p = Brdstr(&b, '\n', 1)) != nil){
+fprint(2, "%s...\n", p);
+		nf = tokenize(p, f, nelem(f));
+		for(i=0; i<nelem(cmdtab); i++){
+			if(strcmp(cmdtab[i].cmd, f[0]) == 0){
+				cmdtab[i].fn(nf, f);
+				break;
+			}
+		}
+		if(i == nelem(cmdtab))
+			print("! unrecognized command %s\n", f[0]);
+		free(p);
+	}
+	exits(0);
+}
+