altos/draw: Add line test app

[fw/altos] / src / draw / line-test.c

diff --git a/src/draw/line-test.c b/src/draw/line-test.c
new file mode 100644 (file)
index 0000000..df77bae
--- /dev/null
+++ b/src/draw/line-test.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright © 2023 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#define TRACK_POINTER
+
+#include "test-frame.c"
+
+static int16_t x1 = 32, my_y1 = 10, x2 = 32, my_y2 = 100;
+
+void HandleExpose(Display *dpy, Window win, GC gc)
+{
+       ao_rect(&fb, 0, 0, WIDTH, HEIGHT, 0xffffffff, AO_COPY);
+
+       ao_line(&fb, x1, my_y1, x2, my_y2, 0x00000000, AO_COPY);
+
+       DoDisplay(dpy, win, gc);
+       DisplayPositions(dpy, win, gc, current_positions);
+}
+
+void
+Draw(Display *dpy, Window win, GC gc, PositionRec positions[5])
+{
+       x1 = (int16_t) positions[0].cur_x / IMAGE_SCALE;
+       my_y1 = (int16_t) positions[0].cur_y / IMAGE_SCALE;
+       x2 = (int16_t) positions[2].cur_x / IMAGE_SCALE;
+       my_y2 = (int16_t) positions[2].cur_y / IMAGE_SCALE;
+       HandleExpose(dpy, win, gc);
+}
+
+void
+Undraw(Display *dpy, Window win, GC gc, PositionRec positions[5])
+{
+       (void) dpy;
+       (void) win;
+       (void) gc;
+       (void) positions;
+}