Use 2^x textures for GisMarker

[grits] / src / objects / gis-marker.c

diff --git a/src/objects/gis-marker.c b/src/objects/gis-marker.c
index 0033080ad9fd1ed20322e51c99c13f711f84bf01..f02da47d7a9f2e8e8194d2a2bf5a0eb7a75124a9 100644 (file)
--- a/src/objects/gis-marker.c
+++ b/src/objects/gis-marker.c
@@ -15,45 +15,92 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * SECTION:gis-marker
+ * @short_description: Single point markers
+ *
+ * Each #GisMarker represents some point on the earth with some form of
+ * content. Commonly this is used to mark geographic features such as cities or
+ * states.
+ * 
+ * While markers represent a place in three dimensions somewhere on, below, or
+ * above the surface of the earth, they are drawn in 2 dimensions so that they
+ * look normal and readable by the user. Due to this, GisObjects should almost
+ * always be added to the GIS_LEVEL_OVERLAY level so they are drawn "above" the
+ * actual earth.
+ */
+
 #include <config.h>
 #include "gis-marker.h"
 
-/* GisMarker */
-G_DEFINE_TYPE(GisMarker, gis_marker, GIS_TYPE_OBJECT);
-static void gis_marker_init(GisMarker *self) { }
+/*************
+ * GisMarker *
+ *************/
+/**
+ * gis_marker_new:
+ * @label: a short description of the marker
+ *
+ * Create a new GisMarker which shows the given label when drawn.
+ *
+ * Returns: the new #GisMarker.
+ */
+GisMarker *gis_marker_new(const gchar *label)
+{
+       //g_debug("GisMarker: new - %s", label);
+       static const gdouble OUTLINE =   2;
+       static const gdouble RADIUS  =   3;
+       static const gdouble WIDTH   = 128;
+       static const gdouble HEIGHT  =  32;
 
-static void gis_marker_finalize(GObject *_self);
-static void gis_marker_class_init(GisMarkerClass *klass)
+       GisMarker *marker = g_object_new(GIS_TYPE_MARKER, NULL);
+       marker->xoff  = RADIUS+OUTLINE;
+       marker->yoff  = HEIGHT-(RADIUS+OUTLINE);
+       marker->label = g_strdup(label);
+       marker->cairo = cairo_create(cairo_image_surface_create(
+                               CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT));
+
+       cairo_select_font_face(marker->cairo, "sans-serif",
+                       CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
+       cairo_set_font_size(marker->cairo, 13);
+
+       /* Draw outline */
+       cairo_set_source_rgba(marker->cairo, 0, 0, 0, 1);
+       cairo_set_line_width(marker->cairo, OUTLINE*2);
+
+       cairo_arc(marker->cairo, marker->xoff, marker->yoff, RADIUS, 0, 2*G_PI);
+       cairo_stroke(marker->cairo);
+
+       cairo_move_to(marker->cairo, marker->xoff+4, marker->yoff-8);
+       cairo_text_path(marker->cairo, marker->label);
+       cairo_stroke(marker->cairo);
+
+       /* Draw filler */
+       cairo_set_source_rgba(marker->cairo, 1, 1, 1, 1);
+
+       cairo_arc(marker->cairo, marker->xoff, marker->yoff, RADIUS, 0, 2*G_PI);
+       cairo_fill(marker->cairo);
+
+       cairo_move_to(marker->cairo, marker->xoff+4, marker->yoff-8);
+       cairo_show_text(marker->cairo, marker->label);
+       return marker;
+}
+
+G_DEFINE_TYPE(GisMarker, gis_marker, GIS_TYPE_OBJECT);
+static void gis_marker_init(GisMarker *marker)
 {
-       G_OBJECT_CLASS(klass)->finalize = gis_marker_finalize;
 }
 
-GisMarker *gis_marker_new(const gchar *label)
+static void gis_marker_finalize(GObject *_marker)
 {
-       static const int RADIUS =   4;
-       static const int WIDTH  = 100;
-       static const int HEIGHT =  20;
-
-       GisMarker *self = g_object_new(GIS_TYPE_MARKER, NULL);
-       self->xoff  = RADIUS;
-       self->yoff  = HEIGHT-RADIUS;
-       self->label = g_strdup(label);
-       self->cairo = cairo_create(cairo_image_surface_create(
-                               CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT));
-       cairo_set_source_rgba(self->cairo, 1, 1, 1, 1);
-       cairo_arc(self->cairo, self->xoff, self->yoff, RADIUS, 0, 2*G_PI);
-       cairo_fill(self->cairo);
-       cairo_move_to(self->cairo, self->xoff+4, self->yoff-8);
-       cairo_set_font_size(self->cairo, 10);
-       cairo_show_text(self->cairo, self->label);
-       return self;
+       GisMarker *marker = GIS_MARKER(_marker);
+       //g_debug("GisMarker: finalize - %s", marker->label);
+       cairo_surface_t *surface = cairo_get_target(marker->cairo);
+       cairo_surface_destroy(surface);
+       cairo_destroy(marker->cairo);
+       g_free(marker->label);
 }
 
-static void gis_marker_finalize(GObject *_self)
+static void gis_marker_class_init(GisMarkerClass *klass)
 {
-       GisMarker *self = GIS_MARKER(_self);
-       cairo_surface_destroy(cairo_get_target(self->cairo));
-       cairo_destroy(self->cairo);
-       g_free(self->label);
-       g_free(self);
+       G_OBJECT_CLASS(klass)->finalize = gis_marker_finalize;
 }