first commit

win.c

@@ -0,0 +1,144 @@
+#include <xcb/xcb.h>
+#include "dat.h"
+#include "fn.h"
+
+enum {
+	Asciitofull = 0xFEE0,
+};
+
+extern char *fontpath;
+
+static xcb_connection_t *conn;
+static xcb_screen_t *scr;
+static xcb_window_t win;
+static xcb_gcontext_t gc;
+static u32int *img;
+static int depth;
+
+static xcb_screen_t*
+getscr(xcb_connection_t *c, int n)
+{
+	xcb_screen_iterator_t i;
+
+	for(i = xcb_setup_roots_iterator(xcb_get_setup(c)); i.rem; xcb_screen_next(&i))
+		if(n-- == 0)
+			return i.data;
+	return nil;
+}
+
+static void
+wininit(void)
+{
+	int n;
+	u32int mask, vals[4];
+
+	conn = xcb_connect(nil, &n);
+	if(conn == nil || xcb_connection_has_error(conn))
+		die("xcb_connect");
+	scr = getscr(conn, n);
+	if(scr == nil)
+		die("no screen");
+	depth = scr->root_depth;
+	win = xcb_generate_id(conn);
+	mask = XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL |
+	       XCB_CW_OVERRIDE_REDIRECT | XCB_CW_SAVE_UNDER;
+	vals[0] = Colbg;
+	vals[1] = 0;
+	vals[2] = 1;
+	vals[3] = 1;
+	xcb_create_window(conn, XCB_COPY_FROM_PARENT, win, scr->root,
+		0, 0, 1, 1, 0, XCB_WINDOW_CLASS_INPUT_OUTPUT,
+		scr->root_visual, mask, vals);
+	gc = xcb_generate_id(conn);
+	xcb_create_gc(conn, gc, win, 0, nil);
+	img = emalloc(Imgw * Imgh * sizeof(img[0]));
+	fontinit(fontpath);
+}
+
+static void
+drawstr(u32int *buf, int x, int y, Rune *r, int n, int maxw, int maxh)
+{
+	while(n-- > 0){
+		putfont(buf, maxw, maxh, x, y, *r++);
+		x += Fontsz;
+	}
+}
+
+static void
+drawkouho(Drawcmd *dc, int first, int n, int w, int h)
+{
+	int sely, y, i;
+	Str *s;
+
+	sely = 2 + (dc->sel - first) * Fontsz;
+	memset(img, (uchar)Colbg, w * h * sizeof(u32int));
+	memset(img + sely * w, (uchar)Colsel, Fontsz * w * sizeof(u32int));
+	for(y = 2, i = 0; i < n; i++, y += Fontsz){
+		s = &dc->kouho[first+i];
+		putfont(img, w, h, 0, y, '1' + i + Asciitofull);
+		drawstr(img, 2*Fontsz, y, s->r, s->n, w, h);
+	}
+}
+
+static void
+putimage(int w, int h)
+{
+	xcb_put_image(conn, XCB_IMAGE_FORMAT_Z_PIXMAP, win, gc,
+		w, h, 0, 0, 0, depth, w * h * 4, (u8int*)img);
+	xcb_flush(conn);
+}
+
+static void
+winhide(void)
+{
+	xcb_unmap_window(conn, win);
+	xcb_flush(conn);
+}
+
+static void
+winshow(Drawcmd *dc)
+{
+	int px, py, w, h, i, n, first, maxw;
+	u32int vals[4];
+	xcb_query_pointer_reply_t *ptr;
+	xcb_query_pointer_cookie_t cookie;
+
+	cookie = xcb_query_pointer(conn, scr->root);
+	first = dc->sel >= Maxdisp ? dc->sel - Maxdisp + 1 : 0;
+	n = min(dc->nkouho - first, Maxdisp);
+	maxw = 0;
+	for(i = 0; i < n; i++)
+		maxw = max(maxw, dc->kouho[first+i].n);
+	ptr = xcb_query_pointer_reply(conn, cookie, nil);
+	if(ptr == nil)
+		die("xcb_query_pointer");
+	px = ptr->root_x + 10;
+	py = ptr->root_y + 10;
+	free(ptr);
+	vals[3] = h = n * Fontsz + 4;
+	vals[2] = w = (maxw + 3) * Fontsz;
+	vals[1] = py = max(0, min(py, scr->height_in_pixels - h));
+	vals[0] = px = max(0, min(px, scr->width_in_pixels - w));
+	xcb_configure_window(conn, win,
+		XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y |
+		XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
+		vals);
+	xcb_map_window(conn, win);
+	drawkouho(dc, first, n, w, h);
+	putimage(w, h);
+}
+
+void
+drawthread(void*)
+{
+	Drawcmd dc;
+
+	threadsetname("draw");
+	wininit();
+	while(chanrecv(drawc, &dc) > 0){
+		if(dc.nkouho == 0)
+			winhide();
+		else
+			winshow(&dc);
+	}
+}