/**
* draw_object
* @x: x position
* @y: y position
* @type: object type
* @cr: context to draw on
*
* Description:
* Draws graphics for an object at specified location
**/
static void
draw_object (gint x, gint y, gint type, cairo_t * cr)
{
if (game_area == NULL)
return;
switch (type) {
case OBJECT_PLAYER:
draw_tile_pixmap (SCENARIO_PLAYER_START + player_animation,
x, y, cr);
break;
case OBJECT_ROBOT1:
draw_tile_pixmap (SCENARIO_ROBOT1_START + robot_animation,
x, y, cr);
break;
case OBJECT_ROBOT2:
draw_tile_pixmap (SCENARIO_ROBOT2_START + robot_animation,
x, y, cr);
break;
case OBJECT_HEAP:
draw_tile_pixmap (SCENARIO_HEAP_POS, x, y, cr);
break;
case OBJECT_NONE:
draw_tile_pixmap (-1, x, y, cr);
break;
}
}
/**
* clear_bubble_area
*
* Description:
* clears the area underneath a bubble
**/
static void
clear_bubble_area (void)
{
int t0i, t0j; /* (i,j) coordinates of bubble's top/left tile */
int ntiles_hor, ntiles_ver; /* number of tiles hotizontal/vertically affected */
int delta; /* pixels from tile's left/top border to bubble's left/top border */
int i, j;
if (game_area == NULL)
return;
t0i = bubble_xpos / tile_width;
t0j = bubble_ypos / tile_height;
ntiles_hor = (BUBBLE_WIDTH + tile_width - 1) / tile_width; /* first shot at number of tiles affected */
delta = bubble_xpos % tile_width;
if (delta > 0) { /* buble does not start at a tile's left boundary */
if ((BUBBLE_WIDTH + delta) > ntiles_hor * tile_width) { /* catches an extra tile */
ntiles_hor++;
}
}
ntiles_ver = (BUBBLE_HEIGHT + tile_height - 1) / tile_height;
delta = bubble_ypos % tile_height;
if (delta > 0) { /* buble does not start at a tile's top boundary */
if ((BUBBLE_HEIGHT + delta) > ntiles_ver * tile_height) { /* catches an extra tile */
ntiles_ver++;
}
}
for (i = t0i; i < t0i + ntiles_hor; ++i) {
for (j = t0j; j < t0j + ntiles_ver; ++j) {
draw_tile_pixmap (-1, i, j, game_area);
}
}
}
gint
expose_cb (GtkWidget * w, GdkEventExpose * e, gpointer data)
{
int i, j;
int x1, y1, x2, y2;
x1 = e->area.x / tile_width;
y1 = e->area.y / tile_height;
x2 = x1 + e->area.width / tile_width + 1;
y2 = y1 + e->area.height / tile_height + 1;
for (j = y1; j <= y2; j++) {
for (i = x1; i <= x2; i++) {
/* Draw a blank space. Animation fills the objects in. */
draw_tile_pixmap (-1, i, j, w);
}
}
return TRUE;
}