1 files changed, 67 insertions, 1 deletions

diff --git a/src/frontend_linux.c b/src/frontend_linux.c
index e65c888..e6e7601 100644
--- a/src/frontend_linux.c
+++ b/src/frontend_linux.c
@@ -37,7 +37,14 @@ static int linux_set_geometry(nsfb_t *nsfb, int width, int height, int bpp)
 
 static int linux_initialise(nsfb_t *nsfb)
 {
-    UNUSED(nsfb);
+    if (nsfb->frontend_priv != NULL)
+        return -1;
+
+    /* sanity checked depth. */
+    if ((nsfb->bpp != 32) && (nsfb->bpp != 16) && (nsfb->bpp != 8))
+        return -1;
+
+
     return 0;
 }
 
@@ -55,10 +62,69 @@ static bool linux_input(nsfb_t *nsfb, nsfb_event_t *event, int timeout)
     return false;
 }
 
+static int linux_claim(nsfb_t *nsfb, nsfb_bbox_t *box)
+{
+    struct nsfb_cursor_s *cursor = nsfb->cursor;
+
+    if ((cursor != NULL) && 
+        (cursor->plotted == true) && 
+        (nsfb_plot_bbox_intersect(box, &cursor->loc))) {
+
+        nsfb->plotter_fns->bitmap(nsfb, 
+                                  &cursor->savloc,  
+                                  cursor->sav, 
+                                  cursor->sav_width, 
+                                  cursor->sav_height, 
+                                  cursor->sav_width, 
+                                  false);
+        cursor->plotted = false;
+    }
+    return 0;
+}
+
+static int linux_cursor(nsfb_t *nsfb, struct nsfb_cursor_s *cursor)
+{
+    nsfb_bbox_t sclip;
+
+    if ((cursor != NULL) && (cursor->plotted == true)) {
+        sclip = nsfb->clip;
+
+        nsfb->plotter_fns->set_clip(nsfb, NULL);
+
+        nsfb->plotter_fns->bitmap(nsfb, 
+                                  &cursor->savloc,  
+                                  cursor->sav, 
+                                  cursor->sav_width, 
+                                  cursor->sav_height, 
+                                  cursor->sav_width, 
+                                  false);
+
+        nsfb_cursor_plot(nsfb, cursor);
+
+        nsfb->clip = sclip;
+    }
+    return true;
+}
+
+
+static int linux_release(nsfb_t *nsfb, nsfb_bbox_t *box)
+{
+    struct nsfb_cursor_s *cursor = nsfb->cursor;
+
+    if ((cursor != NULL) && (cursor->plotted == false)) {
+        nsfb_cursor_plot(nsfb, cursor);
+    }
+
+    return 0;
+}
+
 const nsfb_frontend_rtns_t linux_rtns = {
     .initialise = linux_initialise,
     .finalise = linux_finalise,
     .input = linux_input,
+    .claim = linux_claim,
+    .release = linux_release,
+    .cursor = linux_cursor,
     .geometry = linux_set_geometry,
 };