Add method for frontends to query the backend's cursor location.

The Rockbox frontend allows games to be displayed in a "zoomed-in"
state targets with small displays. Currently we use a modal interface
-- a "viewing" mode in which the cursor keys are used to pan around
the rendered bitmap; and an "interaction" mode that actually sends
keys to the game.

This commit adds a midend_get_cursor_location() function to allow the
frontend to retrieve the backend's cursor location or other "region of
interest" -- such as the player location in Cube or Inertia.

With this information, the Rockbox frontend can now intelligently
follow the cursor around in the zoomed-in state, eliminating the need
for a modal interface.

1 files changed, 14 insertions, 0 deletions

diff --git a/samegame.c b/samegame.c
index 272c7b4..615c60e 100644
--- a/samegame.c
+++ b/samegame.c
@@ -1615,6 +1615,19 @@ static float game_flash_length(const game_state *oldstate,
 	return 0.0F;
 }
 
+static void game_get_cursor_location(const game_ui *ui,
+                                     const game_drawstate *ds,
+                                     const game_state *state,
+                                     const game_params *params,
+                                     int *x, int *y, int *w, int *h)
+{
+    if(ui->displaysel) {
+        *x = COORD(ui->xsel);
+        *y = COORD(ui->ysel);
+        *w = *h = TILE_SIZE;
+    }
+}
+
 static int game_status(const game_state *state)
 {
     /*
@@ -1673,6 +1686,7 @@ const struct game thegame = {
     game_redraw,
     game_anim_length,
     game_flash_length,
+    game_get_cursor_location,
     game_status,
     false, false, game_print_size, game_print,
     true,			       /* wants_statusbar */