1 files changed, 93 insertions, 0 deletions

diff --git a/src/mtstate.c b/src/mtstate.c
new file mode 100644
index 0000000..a8541dc
--- /dev/null
+++ b/src/mtstate.c
@@ -0,0 +1,93 @@
+/***************************************************************************
+ *
+ * Multitouch X driver
+ * Copyright (C) 2008 Henrik Rydberg <rydberg@euromail.se>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ **************************************************************************/
+
+#include "mtstate.h"
+
+#define TOUCH_WIDTH(hw) (0.05 * hw->width_major)
+#define TOUCH_SCALE(caps) (0.05 * caps->abs_touch_major.maximum)
+
+void init_mtstate(struct MTState *s)
+{
+        memset(s, 0, sizeof(struct MTState));
+}
+
+static int touching_finger(const struct FingerData *hw,
+                           const struct Capabilities *caps)
+{
+        if (caps->has_touch_major && caps->has_width_major)
+                return hw->touch_major > TOUCH_WIDTH(hw);
+        if (caps->has_touch_major)
+                return hw->touch_major > TOUCH_SCALE(caps);
+        return 1;
+}
+
+void extract_mtstate(struct MTState *s,
+                     const struct HWState *hs,
+                     const struct Capabilities *caps)
+{
+        int i;
+
+        s->nfinger = 0;
+        for (i = 0; i < hs->nfinger; i++)
+                if (touching_finger(&hs->finger[i].hw, caps))
+                        s->finger[s->nfinger++] = hs->finger[i];
+
+        s->button = hs->button;
+        s->evtime = hs->evtime;
+}
+
+const struct FingerState *find_finger(const struct MTState *s, int id)
+{
+        int i;
+
+        for (i = 0; i < s->nfinger; i++)
+                if (s->finger[i].id == id)
+                        return s->finger + i;
+
+        return NULL;
+}
+
+void output_mtstate(const struct MTState *s)
+{
+        int i;
+        xf86Msg(X_INFO, "buttons: %d%d%d\n",
+                GETBIT(s->button, MT_BUTTON_LEFT),
+                GETBIT(s->button, MT_BUTTON_MIDDLE),
+                GETBIT(s->button, MT_BUTTON_RIGHT));
+        xf86Msg(X_INFO, "fingers: %d\n",
+                s->nfinger);
+        xf86Msg(X_INFO, "evtime: %lld\n",
+                s->evtime);
+        for (i = 0; i < s->nfinger; i++) {
+                xf86Msg(X_INFO,
+                        "  %+02d %+05d:%+05d +%05d:%+05d "
+                        "%+06d %+06d %+05d:%+05d\n",
+                        s->finger[i].id,
+                        s->finger[i].hw.touch_major,
+                        s->finger[i].hw.touch_minor,
+                        s->finger[i].hw.width_major,
+                        s->finger[i].hw.width_minor,
+                        s->finger[i].hw.orientation,
+                        s->finger[i].hw.pressure,
+                        s->finger[i].hw.position_x,
+                        s->finger[i].hw.position_y);
+        }
+}