dfbapi.c

   1 /*
   2  * scientific visualization api for direct framebuffer
   3  *
   4  * author: hackbard@hackdaworld.dyndns.org
   5  *
   6  */
   7
   8 #include <stdio.h>
   9 #include "dfbapi.h"
  10
  11 /* two dimensional lattice */
  12
  13 int d2_lattice_init(int *argc,char **argv,d2_lattice *d2_l,int x,int y)
  14 {
  15  DFBSurfaceDescription surface_dsc;
  16  DFBFontDescription font_dsc;
  17
  18  d2_l->max_x=x;
  19  d2_l->max_y=y;
  20
  21  DirectFBInit(argc,&argv);
  22  DirectFBCreate(&(d2_l->dfb));
  23  d2_l->dfb->SetCooperativeLevel(d2_l->dfb,DFSCL_FULLSCREEN);
  24
  25  surface_dsc.flags=DSDESC_CAPS;
  26  surface_dsc.caps=DSCAPS_PRIMARY|DSCAPS_FLIPPING;
  27  d2_l->dfb->CreateSurface(d2_l->dfb,&surface_dsc,&(d2_l->p_surface));
  28  d2_l->p_surface->GetSize(d2_l->p_surface,&(d2_l->s_width),&(d2_l->s_height));
  29
  30  font_dsc.flags=DFDESC_HEIGHT;
  31  font_dsc.height=d2_l->max_y*((d2_l->s_height)/(d2_l->max_y))/40; /* 40 ? */
  32  d2_l->font_h=font_dsc.height;
  33  d2_l->dfb->CreateFont(d2_l->dfb,FONT,&font_dsc,&(d2_l->font));
  34  d2_l->p_surface->SetFont(d2_l->p_surface,d2_l->font);
  35
  36  d2_l->fakt_y=(d2_l->s_height)/(d2_l->max_y+(2*Y_GAP));
  37  d2_l->fakt_x=(d2_l->s_height)/(d2_l->max_x+X_GAP); /* bullshit, i can't imagine atm */
  38  d2_l->info_x=d2_l->fakt_x*d2_l->max_x+2*X_GAP;
  39  d2_l->info_y=Y_GAP;
  40  d2_l->info_w=d2_l->s_width-d2_l->info_x-2*X_GAP;
  41  d2_l->info_h=d2_l->max_y*d2_l->fakt_y;
  42
  43  if((d2_l->s_height<(d2_l->max_y+2*Y_GAP)) || (d2_l->s_height<(d2_l->max_x+X_GAP)))
  44  {
  45   puts("resolution too low!");
  46   return -1;
  47  } else return 1;
  48 }
  49
  50 int d2_lattice_release(d2_lattice *d2_l)
  51 {
  52  d2_l->font->Release(d2_l->font);
  53  d2_l->p_surface->Release(d2_l->p_surface);
  54  d2_l->dfb->Release(d2_l->dfb);
  55
  56  return 1;
  57 }
  58
  59 int d2_lattice_get_color(unsigned char *status,unsigned char *r,unsigned char *g,unsigned char *b)
  60 {
  61  if((*status)&RED)
  62  {
  63   *r=0xff;
  64   *g=0;
  65   *b=0;
  66  } else
  67  {
  68   *r=0;
  69   *g=0;
  70   *b=0xff;
  71  }
  72
  73  return 1;
  74 }
  75
  76 int d2_lattice_draw(d2_lattice *d2_l,int x,int y,int arg_c,char **arg_v)
  77 {
  78  int x_c,y_c;
  79  int i;
  80  unsigned char r,g,b,a;
  81
  82  a=0xff; /* no alpha blending */
  83
  84  for(x_c=0;x_c<d2_l->max_x;x_c++)
  85  {
  86   for(y_c=0;y_c<d2_l->max_y;y_c++)
  87   {
  88    d2_lattice_get_color((*d2_l).status+x_c+y_c*d2_l->max_x,&r,&g,&b);
  89    if(x_c==x && y_c==y)
  90    {
  91     r=0xff;
  92     g=0xff;
  93     b=0;
  94    }
  95    d2_l->p_surface->SetColor(d2_l->p_surface,r,g,b,a);
  96    d2_l->p_surface->DrawRectangle(d2_l->p_surface,
  97                                   x_c*d2_l->fakt_x+X_GAP,
  98                                   y_c*d2_l->fakt_y+Y_GAP,
  99                                   d2_l->fakt_x,d2_l->fakt_y);
 100   }
 101  }
 102  r=0xff;
 103  g=0xff;
 104  b=0;
 105  /* clear info box */
 106  d2_l->p_surface->SetColor(d2_l->p_surface,0,0,0,0);
 107  d2_l->p_surface->FillRectangle(d2_l->p_surface,
 108                                 d2_l->info_x,d2_l->info_y,
 109                                 d2_l->info_w,d2_l->info_h);
 110  d2_l->p_surface->SetColor(d2_l->p_surface,r,g,b,a);
 111  d2_l->p_surface->DrawRectangle(d2_l->p_surface,
 112                                 d2_l->info_x,d2_l->info_y,
 113                                 d2_l->info_w,d2_l->info_h);
 114  d2_l->p_surface->SetColor(d2_l->p_surface,0x80,0x80,0xff,0xff);
 115  for(i=1;i<=arg_c;i++)
 116  {
 117   d2_l->p_surface->DrawString(d2_l->p_surface,arg_v[i],-1,
 118                               d2_l->info_x+d2_l->fakt_x,
 119                               d2_l->info_y+d2_l->fakt_y+d2_l->font_h+(i-1)*2*d2_l->font_h,
 120                               DSTF_LEFT);
 121  }
 122  /* now we flip all to surface */
 123  d2_l->p_surface->Flip(d2_l->p_surface,NULL,0);
 124
 125  return 1;
 126 }
 127