From a2254c5a9670a3e865f0eb5acd46e905c9b146ce Mon Sep 17 00:00:00 2001
From: Jakob Bornecrantz <jakob@tungstengraphics.com>
Date: Mon, 28 Jan 2008 03:12:29 +0100
Subject: Added cursor support

---
 tests/modefb/demo.c | 150 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 tests/modefb/demo.c

(limited to 'tests/modefb/demo.c')

diff --git a/tests/modefb/demo.c b/tests/modefb/demo.c
new file mode 100644
index 00000000..0dbf01c7
--- /dev/null
+++ b/tests/modefb/demo.c
@@ -0,0 +1,150 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include "linux/fb.h"
+#include "sys/ioctl.h"
+
+
+void setMode(struct fb_var_screeninfo *var);
+void pan(int fd, struct fb_var_screeninfo *var, int x, int y);
+void cursor(int fd);
+
+int main(int argc, char **argv)
+{
+	struct fb_var_screeninfo var;
+	struct fb_fix_screeninfo fix;
+	const char* name = "/dev/fb0";
+
+	int fd = open(name, O_RDONLY);
+
+	if (fd == -1) {
+		printf("open %s : %s\n", name, strerror(errno));
+		return 1;
+	}
+
+	memset(&var, 0, sizeof(struct fb_var_screeninfo));
+	memset(&fix, 0, sizeof(struct fb_fix_screeninfo));
+
+	if (ioctl(fd, FBIOGET_VSCREENINFO, &var))
+		printf("var  %s\n", strerror(errno));
+	if	(ioctl(fd, FBIOGET_FSCREENINFO, &fix))
+		printf("fix %s\n", strerror(errno));
+
+	setMode(&var);
+	printf("pan: 0, 0\n");
+	pan(fd, &var, 0, 0);
+	sleep(2);
+	printf("pan: 100, 0\n");
+	pan(fd, &var, 100, 0);
+	sleep(2);
+	printf("pan: 0, 100\n");
+	pan(fd, &var, 0, 100);
+	sleep(2);
+	printf("pan: 100, 100\n");
+	pan(fd, &var, 100, 100);
+	sleep(2);
+	printf("pan: 0, 0\n");
+	pan(fd, &var, 0, 0);
+	sleep(2);
+
+	printf("cursor\n");
+	cursor(fd);
+	return 0;
+}
+
+void pan(int fd, struct fb_var_screeninfo *var, int x, int y)
+{
+	var->xoffset = x;
+	var->yoffset = y;
+
+	var->activate = FB_ACTIVATE_NOW;
+
+	if (ioctl(fd, FBIOPUT_VSCREENINFO, var))
+		printf("pan error: %s\n", strerror(errno));
+}
+
+/*
+ * Currently isn't supported in the driver
+ */
+void cursor(int fd)
+{
+	struct fb_cursor cur;
+	void *data = malloc(64 * 64 * 4);
+	memset(&cur, 0, sizeof(cur));
+
+	cur.set = FB_CUR_SETIMAGE | FB_CUR_SETPOS | FB_CUR_SETSIZE;
+	cur.enable = 1;
+	cur.image.dx = 1;
+	cur.image.dy = 1;
+	cur.image.width = 2;
+	cur.image.height = 2;
+	cur.image.depth = 32;
+	cur.image.data = data;
+
+	if (ioctl(fd, FBIO_CURSOR, &cur))
+		printf("cursor error: %s\n", strerror(errno));
+
+	sleep(2);
+
+	memset(&cur, 0, sizeof(cur));
+	cur.set = FB_CUR_SETPOS;
+	cur.enable = 0;
+	cur.image.dx = 100;
+	cur.image.dy = 100;
+
+	if (ioctl(fd, FBIO_CURSOR, &cur))
+		printf("cursor error: %s\n", strerror(errno));
+
+	free(data);
+}
+
+struct drm_mode
+{
+	int clock;
+	int hdisplay;
+	int hsync_start;
+	int hsync_end;
+	int htotal;
+	int hskew;
+	int vdisplay;
+	int vsync_start;
+	int vsync_end;
+	int vtotal;
+	int vscan;
+	int vrefresh;
+	int flags;
+};
+
+struct drm_mode mode =
+{
+	.clock = 25200,
+	.hdisplay = 640,
+	.hsync_start = 656,
+	.hsync_end = 752,
+	.htotal = 800,
+	.hskew = 0,
+	.vdisplay = 480,
+	.vsync_start = 490,
+	.vsync_end = 492,
+	.vtotal = 525,
+	.vscan = 0,
+	.vrefresh = 60000, /* vertical refresh * 1000 */
+	.flags = 10,
+};
+
+void setMode(struct fb_var_screeninfo *var) {
+	var->activate = FB_ACTIVATE_NOW;
+	var->xres = mode.hdisplay;
+	var->right_margin = mode.hsync_start - mode.hdisplay;
+	var->hsync_len = mode.hsync_end - mode.hsync_start;
+	var->left_margin = mode.htotal - mode.hsync_end;
+	var->yres = mode.vdisplay;
+	var->lower_margin = mode.vsync_start - mode.vdisplay;
+	var->vsync_len = mode.vsync_end - mode.vsync_start;
+	var->upper_margin = mode.vtotal - mode.vsync_end;
+	var->pixclock = 10000000 / mode.htotal * 1000 / mode.vtotal * 100;
+	/* avoid overflow */
+	var->pixclock = var->pixclock * 1000 / mode.vrefresh;
+}
-- 
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