cairo.c

   1 #include "sgc.h"
   2
   3 void drawPitchTier(cairo_t *cr, gchar *filename, gint width, gint height, gdouble top) {
   4         gchar *contents;
   5         GError *error = NULL;
   6         gsize length;
   7         g_debug("%s welcomes %s!", __func__, filename);
   8         if (g_file_get_contents(filename, &contents, &length, &error) != TRUE) {
   9 //              g_warning("HET PROBLEEM ZIT IN HET INLEZEN VAN HET %s BESTAND!!!!!\n", filename);
  10                 g_warning("%s\n", error->message);
  11                 g_error_free(error);
  12         } else {
  13                 gdouble scalex = 0, scaley = 0;
  14                 gdouble fromx = 0;
  15                 gdouble middlex = 0;
  16                 gdouble endx = 0;
  17                 gdouble fromy = 0;
  18                 gdouble middley = 0;
  19                 gsize i = 0;
  20                 gsize j = 0;
  21                 gsize m = 0;
  22                 int pointloc = 0;
  23                 while (i < length) {
  24                         if (contents[i] == '\n') {
  25                                 gchar * this = g_strndup(&contents[m], i-m);
  26                                 switch ( j ) {
  27                                         case 0:
  28                                         case 1:
  29                                         case 2:
  30                                         case 3:
  31                                                 fromx = g_strtod(this, NULL);
  32                                                 j++;
  33                                                 break;
  34                                         case 4:
  35                                                 endx  = g_strtod(this, NULL);
  36                                                 scalex = width / endx;
  37                                                 scaley = height / top;
  38                                                 cairo_move_to(cr, fromx*scalex, 0);
  39                                         case 5:
  40                                                 j++;
  41                                                 break;
  42                                         default:
  43                                                 if (pointloc == 0) {
  44                                                         middlex = g_strtod(this, NULL);
  45
  46                                                         pointloc = 1;
  47                                                 } else {
  48                                                         gdouble to;
  49                                                         middley = g_strtod(this, NULL);
  50                                                         pointloc = 0;
  51                                                         to = height - (middley*scaley);
  52
  53                                                         if ((middlex - fromx) < 0.015 && fromy != -1 && middley != -1) {
  54                                                                 cairo_line_to(cr, middlex*scalex,  to);
  55                                                         } else {
  56                                                                 cairo_move_to(cr, middlex*scalex,  to);
  57                                                         }
  58                                                         fromx = middlex;
  59                                                         fromy = middley;
  60                                                 }
  61
  62                                 }
  63                                 g_free(this);
  64                                 m = i+1;
  65                         }
  66                         i++;
  67                 }
  68                 cairo_stroke (cr);
  69         }
  70         g_debug("%s for %s done!\n", __func__, filename);
  71 }