Diff of /trunk/src/osm-gps-map-osd-classic.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 94 by harbaum, Thu Sep 3 11:04:05 2009 UTC revision 100 by harbaum, Tue Sep 8 10:24:11 2009 UTC
# Line 25  Line 25 
25  /* OSD_DIAMETER */  /* OSD_DIAMETER */
26  /* OSD_X, OSD_Y */  /* OSD_X, OSD_Y */
27    
28    #define OSD_SCALE
29    
30    #define OSD_SCALE_W  120
31    #define OSD_SCALE_H   20
32    
33  #ifndef USE_CAIRO  #ifndef USE_CAIRO
34  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
35  #endif  #endif
# Line 39  typedef struct { Line 44  typedef struct {
44      /* the offscreen representation of the OSD */      /* the offscreen representation of the OSD */
45      cairo_surface_t *overlay;      cairo_surface_t *overlay;
46    
47    #ifdef OSD_SCALE
48        cairo_surface_t *scale;
49    #endif
50    
51  #ifdef OSD_SOURCE_SEL  #ifdef OSD_SOURCE_SEL
52      /* values to handle the "source" menu */      /* values to handle the "source" menu */
53      cairo_surface_t *map_source;      cairo_surface_t *map_source;
# Line 442  osd_source_reallocate(osm_gps_map_osd_t Line 451  osd_source_reallocate(osm_gps_map_osd_t
451    
452      int w = OSD_S_W, h = OSD_S_H;      int w = OSD_S_W, h = OSD_S_H;
453      if(priv->expanded) {      if(priv->expanded) {
         /* ... and right of it the waypoint id */  
454          cairo_text_extents_t extents;          cairo_text_extents_t extents;
455    
456          /* determine content size */          /* determine content size */
# Line 476  osd_source_reallocate(osm_gps_map_osd_t Line 484  osd_source_reallocate(osm_gps_map_osd_t
484          cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);          cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
485    
486      osd_render_source_sel(osd);      osd_render_source_sel(osd);
   
487  }  }
488    
489  #define OSD_HZ      15  #define OSD_HZ      15
# Line 720  osd_zoom_labels(cairo_t *cr, gint x, gin Line 727  osd_zoom_labels(cairo_t *cr, gint x, gin
727      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
728  }  }
729    
730    static char *
731    dist_str_metric(int dist)
732    {
733        if(dist<1000)
734            return g_strdup_printf("%u m",  dist);
735    
736        return g_strdup_printf("%u km", dist/1000);
737    }
738    
739  static void  static void
740  osd_render(osm_gps_map_osd_t *osd) {  osd_render_scale(osm_gps_map_osd_t *osd)
741    {
742        osd_priv_t *priv = (osd_priv_t*)osd->priv;
743        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
744    
745        /* first fill with transparency */
746        cairo_t *cr = cairo_create(priv->scale);
747        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
748        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
749        //    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
750        cairo_paint(cr);
751        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
752    
753        /* determine the size of the scale width in meters */
754        float width = (OSD_SCALE_W-2) * m_per_pix;
755        printf("width = %f meters\n", width);
756    
757        /* scale this to useful values */
758        int exp = logf(width)*M_LOG10E;
759        int mant = width/pow(10,exp);
760        printf("mant = %d, exp = %d \n", mant, exp);
761    
762        int width_metric = mant * pow(10,exp);
763        char *dist_str = dist_str_metric(width_metric);
764        width_metric /= m_per_pix;
765        printf("metric scale width = %d pixels: %s\n", width_metric, dist_str);
766    
767        int font_size = 12;
768    
769        cairo_select_font_face (cr, "Sans",
770                                CAIRO_FONT_SLANT_NORMAL,
771                                CAIRO_FONT_WEIGHT_BOLD);
772        cairo_set_font_size (cr, font_size);
773        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
774    
775        cairo_text_extents_t extents;
776        cairo_text_extents (cr, dist_str, &extents);
777    
778        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
779        cairo_move_to (cr, font_size/3, font_size);
780        cairo_text_path (cr, dist_str);
781        cairo_set_line_width (cr, 2);
782        cairo_stroke (cr);
783    
784        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
785        cairo_move_to (cr, font_size/3, font_size);
786        cairo_show_text (cr, dist_str);
787    
788        /* draw white line */
789        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
790        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
791        cairo_set_line_width (cr, 4);
792        cairo_move_to (cr, 2, 2*font_size/3);
793        cairo_rel_line_to (cr, 0,  2*font_size/3);
794        cairo_rel_line_to (cr, width_metric, 0);
795        cairo_rel_line_to (cr, 0, -2*font_size/3);
796        cairo_stroke(cr);
797    
798        /* draw black line */
799        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
800        cairo_set_line_width (cr, 2);
801        cairo_move_to (cr, 2, 2*font_size/3);
802        cairo_rel_line_to (cr, 0,  2*font_size/3);
803        cairo_rel_line_to (cr, width_metric, 0);
804        cairo_rel_line_to (cr, 0, -2*font_size/3);
805        cairo_stroke(cr);
806    
807        /* xyz */
808    
809        cairo_destroy(cr);
810    }
811    
812    static void
813    osd_render(osm_gps_map_osd_t *osd)
814    {
815      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
816    
817  #ifndef OSD_COLOR  #ifndef OSD_COLOR
# Line 806  osd_render(osm_gps_map_osd_t *osd) { Line 896  osd_render(osm_gps_map_osd_t *osd) {
896  #ifdef OSD_SOURCE_SEL  #ifdef OSD_SOURCE_SEL
897      osd_render_source_sel(osd);      osd_render_source_sel(osd);
898  #endif  #endif
899    
900    #ifdef OSD_SCALE
901        osd_render_scale(osd);
902    #endif
903  }  }
904    
905  static void  static void
# Line 827  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 921  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
921                                             OSD_S_W+2, OSD_S_H+2);                                             OSD_S_W+2, OSD_S_H+2);
922  #endif  #endif
923    
924    #ifdef OSD_SCALE
925            priv->scale =
926                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
927                                           OSD_SCALE_W+2, OSD_SCALE_H+2);
928    #endif
929    
930          /* ... and render it */          /* ... and render it */
931          osd_render(osd);          osd_render(osd);
932      }      }
# Line 866  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 966  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
966      cairo_paint(cr);      cairo_paint(cr);
967  #endif  #endif
968    
969    #ifdef OSD_SCALE
970        x =  OSD_X;
971        y = -OSD_Y;
972        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
973        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
974    
975        cairo_set_source_surface(cr, priv->scale, x, y);
976        cairo_paint(cr);
977    #endif
978    
979      cairo_destroy(cr);      cairo_destroy(cr);
980  }  }
981    
# Line 885  osd_free(osm_gps_map_osd_t *osd) Line 995  osd_free(osm_gps_map_osd_t *osd)
995           cairo_surface_destroy(priv->map_source);           cairo_surface_destroy(priv->map_source);
996  #endif  #endif
997    
998    #ifdef OSD_SCALE
999        if (priv->scale)
1000             cairo_surface_destroy(priv->scale);
1001    #endif
1002    
1003      g_free(priv);      g_free(priv);
1004  }  }
1005    
Legend:
Removed from v.94  
changed lines
  Added in v.100