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

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revision 98 by harbaum, Mon Sep 7 13:20:37 2009 UTC revision 106 by harbaum, Thu Sep 10 13:06:16 2009 UTC
# Line 25  Line 25 
25  /* OSD_DIAMETER */  /* OSD_DIAMETER */
26  /* OSD_X, OSD_Y */  /* OSD_X, OSD_Y */
27    
 #define OSD_SCALE  
   
 #define OSD_SCALE_W  100  
 #define OSD_SCALE_H   20  
   
28  #ifndef USE_CAIRO  #ifndef USE_CAIRO
29  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
30  #endif  #endif
# Line 39  Line 34 
34  #include "osm-gps-map.h"  #include "osm-gps-map.h"
35  #include "osm-gps-map-osd-classic.h"  #include "osm-gps-map-osd-classic.h"
36    
37    #define OSD_COORDINATES
38    
39  //the osd controls  //the osd controls
40  typedef struct {  typedef struct {
41      /* the offscreen representation of the OSD */      /* the offscreen representation of the OSD */
# Line 46  typedef struct { Line 43  typedef struct {
43    
44  #ifdef OSD_SCALE  #ifdef OSD_SCALE
45      cairo_surface_t *scale;      cairo_surface_t *scale;
46        int scale_zoom;
47    #endif
48    
49    #ifdef OSD_CROSSHAIR
50        cairo_surface_t *crosshair;
51    #endif
52    
53    #ifdef OSD_COORDINATES
54        cairo_surface_t *coordinates;
55  #endif  #endif
56    
57  #ifdef OSD_SOURCE_SEL  #ifdef OSD_SOURCE_SEL
# Line 451  osd_source_reallocate(osm_gps_map_osd_t Line 457  osd_source_reallocate(osm_gps_map_osd_t
457    
458      int w = OSD_S_W, h = OSD_S_H;      int w = OSD_S_W, h = OSD_S_H;
459      if(priv->expanded) {      if(priv->expanded) {
         /* ... and right of it the waypoint id */  
460          cairo_text_extents_t extents;          cairo_text_extents_t extents;
461    
462          /* determine content size */          /* determine content size */
# Line 728  osd_zoom_labels(cairo_t *cr, gint x, gin Line 733  osd_zoom_labels(cairo_t *cr, gint x, gin
733      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
734  }  }
735    
736  static float pixel2m(OsmGpsMap *map, int pixel) {  #ifdef OSD_COORDINATES
737    return pixel*osm_gps_map_get_scale(OSM_GPS_MAP(map));  #define OSD_COORDINATES_W  100
738    #define OSD_COORDINATES_H   50
739    
740    static void
741    osd_render_coordinates(osm_gps_map_osd_t *osd)
742    {
743        osd_priv_t *priv = (osd_priv_t*)osd->priv;
744    
745        /* first fill with transparency */
746        cairo_t *cr = cairo_create(priv->coordinates);
747        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
748        //    cairo_set_source_rgba(cr, 0.0, 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        cairo_destroy(cr);
754    }
755    #endif  // OSD_COORDINATES
756    
757    #ifdef OSD_CROSSHAIR
758    
759    #ifndef OSD_CROSSHAIR_RADIUS
760    #define OSD_CROSSHAIR_RADIUS 10
761    #endif
762    
763    #define OSD_CROSSHAIR_TICK  (OSD_CROSSHAIR_RADIUS/2)
764    #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
765    #define OSD_CROSSHAIR_W  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
766    #define OSD_CROSSHAIR_H  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
767    
768    static void
769    osd_render_crosshair_shape(cairo_t *cr) {
770        cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
771                   OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
772    
773        cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
774                       OSD_CROSSHAIR_H/2);
775        cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
776        cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
777                       OSD_CROSSHAIR_H/2);
778        cairo_rel_line_to (cr,  OSD_CROSSHAIR_TICK, 0);
779    
780        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
781                       OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
782        cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
783        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
784                       OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
785        cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
786    
787        cairo_stroke (cr);
788    }
789    
790    static void
791    osd_render_crosshair(osm_gps_map_osd_t *osd)
792    {
793        osd_priv_t *priv = (osd_priv_t*)osd->priv;
794    
795        /* first fill with transparency */
796        cairo_t *cr = cairo_create(priv->crosshair);
797        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
798        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
799        //    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
800        cairo_paint(cr);
801        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
802    
803        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
804    
805        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
806        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
807        osd_render_crosshair_shape(cr);
808    
809        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
810        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
811        osd_render_crosshair_shape(cr);
812    
813        cairo_destroy(cr);
814  }  }
815    #endif
816    
817    #ifdef OSD_SCALE
818    
819    #ifndef OSD_SCALE_FONT_SIZE
820    #define OSD_SCALE_FONT_SIZE 12
821    #endif
822    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
823    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
824    
825    /* various parameters used to create the scale */
826    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
827    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
828    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
829    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
830    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
831    
832  static void  static void
833  osd_render_scale(osm_gps_map_osd_t *osd)  osd_render_scale(osm_gps_map_osd_t *osd)
834  {  {
835      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
836    
837        /* this only needs to be rendered if the zoom has changed */
838        gint zoom;
839        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
840        if(zoom == priv->scale_zoom)
841            return;
842    
843        priv->scale_zoom = zoom;
844    
845        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
846    
847      /* first fill with transparency */      /* first fill with transparency */
848      cairo_t *cr = cairo_create(priv->scale);      cairo_t *cr = cairo_create(priv->scale);
849      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
850      //    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
851      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);      // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
852      cairo_paint(cr);      cairo_paint(cr);
853      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
854    
855      /* determine the size of the scale width in meters */      /* determine the size of the scale width in meters */
856      float width = pixel2m(OSM_GPS_MAP(osd->widget), OSD_SCALE_W);      float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
857      printf("width = %f meters\n", width);  
   
858      /* scale this to useful values */      /* scale this to useful values */
859      int exp = logf(width)*M_LOG10E;      int exp = logf(width)*M_LOG10E;
860      int mant = width/pow(10,exp);      int mant = width/pow(10,exp);
861      printf("mant = %d, exp = %d \n", mant, exp);      int width_metric = mant * pow(10,exp);
862        char *dist_str = NULL;
863        if(width_metric<1000)
864            dist_str = g_strdup_printf("%u m", width_metric);
865        else
866            dist_str = g_strdup_printf("%u km", width_metric/1000);
867        width_metric /= m_per_pix;
868    
869        /* and now the hard part: scale for useful imperial values :-( */
870        /* try to convert to feet, 1ft == 0.3048 m */
871        width /= 0.3048;
872        float imp_scale = 0.3048;
873        char *dist_imp_unit = "ft";
874    
875        if(width >= 100) {
876            /* 1yd == 3 feet */
877            width /= 3.0;
878            imp_scale *= 3.0;
879            dist_imp_unit = "yd";
880    
881            if(width >= 1760.0) {
882                /* 1mi == 1760 yd */
883                width /= 1760.0;
884                imp_scale *= 1760.0;
885                dist_imp_unit = "mi";
886            }
887        }
888    
889        /* also convert this to full tens/hundreds */
890        exp = logf(width)*M_LOG10E;
891        mant = width/pow(10,exp);
892        int width_imp = mant * pow(10,exp);
893        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
894    
895        /* convert back to pixels */
896        width_imp *= imp_scale;
897        width_imp /= m_per_pix;
898    
899        cairo_select_font_face (cr, "Sans",
900                                CAIRO_FONT_SLANT_NORMAL,
901                                CAIRO_FONT_WEIGHT_BOLD);
902        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
903        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
904    
905        cairo_text_extents_t extents;
906        cairo_text_extents (cr, dist_str, &extents);
907    
908        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
909        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
910        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
911        cairo_text_path (cr, dist_str);
912        cairo_stroke (cr);
913        cairo_move_to (cr, 2*OSD_SCALE_FD,
914                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
915        cairo_text_path (cr, dist_str_imp);
916        cairo_stroke (cr);
917    
918        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
919        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
920        cairo_show_text (cr, dist_str);
921        cairo_move_to (cr, 2*OSD_SCALE_FD,
922                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
923        cairo_show_text (cr, dist_str_imp);
924    
925        g_free(dist_str);
926        g_free(dist_str_imp);
927    
928        /* draw white line */
929        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
930        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
931        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
932        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
933        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
934        cairo_rel_line_to (cr, width_metric, 0);
935        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
936        cairo_stroke(cr);
937        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
938        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
939        cairo_rel_line_to (cr, width_imp, 0);
940        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
941        cairo_stroke(cr);
942    
943        /* draw black line */
944        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
945        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
946        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
947        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
948        cairo_rel_line_to (cr, width_metric, 0);
949        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
950        cairo_stroke(cr);
951        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
952        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
953        cairo_rel_line_to (cr, width_imp, 0);
954        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
955        cairo_stroke(cr);
956    
957      cairo_destroy(cr);      cairo_destroy(cr);
958  }  }
959    #endif
960    
961  static void  static void
962  osd_render(osm_gps_map_osd_t *osd)  osd_render(osm_gps_map_osd_t *osd)
# Line 848  osd_render(osm_gps_map_osd_t *osd) Line 1049  osd_render(osm_gps_map_osd_t *osd)
1049  #ifdef OSD_SCALE  #ifdef OSD_SCALE
1050      osd_render_scale(osd);      osd_render_scale(osd);
1051  #endif  #endif
1052    
1053    #ifdef OSD_CROSSHAIR
1054        osd_render_crosshair(osd);
1055    #endif
1056    
1057    #ifdef OSD_COORDINATES
1058        osd_render_coordinates(osd);
1059    #endif
1060  }  }
1061    
1062  static void  static void
# Line 873  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1082  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1082          priv->scale =          priv->scale =
1083              cairo_image_surface_create(CAIRO_FORMAT_ARGB32,              cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1084                                         OSD_SCALE_W, OSD_SCALE_H);                                         OSD_SCALE_W, OSD_SCALE_H);
1085            priv->scale_zoom = -1;
1086    #endif
1087    
1088    #ifdef OSD_CROSSHAIR
1089            priv->crosshair =
1090                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1091                                           OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1092    #endif
1093    
1094    #ifdef OSD_COORDINATES
1095            priv->coordinates =
1096                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1097                                           OSD_COORDINATES_W, OSD_COORDINATES_H);
1098  #endif  #endif
1099    
1100          /* ... and render it */          /* ... and render it */
# Line 882  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1104  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1104      // now draw this onto the original context      // now draw this onto the original context
1105      cairo_t *cr = gdk_cairo_create(drawable);      cairo_t *cr = gdk_cairo_create(drawable);
1106    
1107      int x = OSD_X, y = OSD_Y;      int x, y;
     if(OSD_X < 0)  
         x = osd->widget->allocation.width - OSD_W + OSD_X;  
1108    
1109      if(OSD_Y < 0)  #ifdef OSD_SCALE
1110          y = osd->widget->allocation.height - OSD_H + OSD_Y;      x =  OSD_X;
1111        y = -OSD_Y;
1112        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1113        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1114    
1115        cairo_set_source_surface(cr, priv->scale, x, y);
1116        cairo_paint(cr);
1117    #endif
1118    
1119    #ifdef OSD_CROSSHAIR
1120        x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1121        y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1122    
1123        cairo_set_source_surface(cr, priv->crosshair, x, y);
1124        cairo_paint(cr);
1125    #endif
1126    
1127    #ifdef OSD_COORDINATES
1128        x = -OSD_X;
1129        y = -OSD_Y;
1130        if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1131        if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1132    
1133        cairo_set_source_surface(cr, priv->coordinates, x, y);
1134        cairo_paint(cr);
1135    #endif
1136    
1137        x = OSD_X;
1138        if(x < 0)
1139            x += osd->widget->allocation.width - OSD_W;
1140    
1141        y = OSD_Y;
1142        if(y < 0)
1143            y += osd->widget->allocation.height - OSD_H;
1144    
1145      cairo_set_source_surface(cr, priv->overlay, x, y);      cairo_set_source_surface(cr, priv->overlay, x, y);
1146      cairo_paint(cr);      cairo_paint(cr);
# Line 914  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 1167  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
1167      cairo_paint(cr);      cairo_paint(cr);
1168  #endif  #endif
1169    
 #ifdef OSD_SCALE  
     x =  OSD_X;  
     y = -OSD_Y;  
     if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;  
     if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;  
   
     cairo_set_source_surface(cr, priv->scale, x, y);  
     cairo_paint(cr);  
 #endif  
   
1170      cairo_destroy(cr);      cairo_destroy(cr);
1171  }  }
1172    
# Line 948  osd_free(osm_gps_map_osd_t *osd) Line 1191  osd_free(osm_gps_map_osd_t *osd)
1191           cairo_surface_destroy(priv->scale);           cairo_surface_destroy(priv->scale);
1192  #endif  #endif
1193    
1194    #ifdef OSD_CROSSHAIR
1195        if (priv->crosshair)
1196             cairo_surface_destroy(priv->crosshair);
1197    #endif
1198    
1199    #ifdef OSD_COORDINATES
1200        if (priv->coordinates)
1201             cairo_surface_destroy(priv->coordinates);
1202    #endif
1203    
1204      g_free(priv);      g_free(priv);
1205  }  }
1206    
Legend:
Removed from v.98  
changed lines
  Added in v.106