dfb_api.c

   1 /*
   2  * dfb_api.c - api to dfb interface
   3  */
   4
   5 /* std includes */
   6 #include <stdio.h>
   7 #include <unistd.h>
   8
   9 /* dfb includes */
  10 #include <directfb.h>
  11
  12 #define MY_FONT_HEIGHT 18
  13
  14 /* global stuff */
  15
  16 /* well ... */
  17 static IDirectFB *dfb = NULL;
  18 static IDirectFBSurface *primary = NULL;
  19 static int screen_width  = 0;
  20 static int screen_height = 0;
  21
  22 static IDirectFBSurface *logo = NULL;
  23
  24 static IDirectFBFont *font = NULL;
  25 static char *text_top="Internet Video / Audio Conferencing";
  26
  27 /* image to load */
  28 char dfb_image[]="./images/ivac_logo.png";
  29 /* font to use */
  30 char dfb_font[]="./fonts/decker.ttf";
  31
  32 int main (int argc, char **argv) {
  33   int i,font_width;
  34   DFBFontDescription font_dsc;
  35   DFBSurfaceDescription dsc;
  36   /* image provider */
  37   IDirectFBImageProvider *provider;
  38
  39   /* init */
  40   DirectFBInit(&argc,&argv);
  41   DirectFBCreate(&dfb);
  42   dfb->SetCooperativeLevel(dfb, DFSCL_FULLSCREEN);
  43   dsc.flags=DSDESC_CAPS;
  44   // dsc.caps=DSCAPS_PRIMARY | DSCAPS_FLIPPING;
  45   dsc.caps=DSCAPS_PRIMARY;
  46   dfb->CreateSurface(dfb,&dsc,&primary);
  47   primary->GetSize(primary,&screen_width,&screen_height);
  48   printf("debug: w/h = %d / %d\n",screen_width,screen_height);
  49
  50   /* create the imag provider */
  51   dfb->CreateImageProvider(dfb,dfb_image,&provider);
  52   /* get image/provider description */
  53   provider->GetSurfaceDescription(provider,&dsc);
  54   printf("debug: w/h %d / %d\n",dsc.width,dsc.height);
  55   /* create apropriate surface */
  56   dfb->CreateSurface(dfb,&dsc,&logo);
  57   /* render image */
  58   provider->RenderTo(provider,logo,NULL);
  59   provider->Release(provider);
  60
  61   /* create font */
  62   font_dsc.flags=DFDESC_HEIGHT;
  63   font_dsc.height=MY_FONT_HEIGHT;
  64   dfb->CreateFont(dfb,dfb_font,&font_dsc,&font);
  65
  66   /* set font */
  67   primary->SetFont(primary,font);
  68   font->GetStringWidth(font,text_top,-1,&font_width);
  69
  70
  71   /* slide logo + write text_top */
  72   for(i = -dsc.width; i < screen_width; i++) {
  73       /* clear screen */
  74       primary->FillRectangle(primary,0,0,screen_width,screen_height);
  75
  76       /* write text */
  77       primary->SetColor(primary,0x0,0x0,0x0,0xff);
  78       primary->DrawString(primary,text_top,-1,(screen_width/2)-(font_width/2),
  79                                 screen_height/4,DSTF_LEFT);
  80
  81       /* blit image */
  82       primary->Blit(primary,logo,NULL,i,(screen_height-dsc.height)/2);
  83
  84       /* flip */
  85       primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC);
  86    }
  87
  88   /* release font */
  89   font->Release(font);
  90
  91   /* release image */
  92   logo->Release(logo);
  93
  94   primary->Release(primary);
  95   dfb->Release(dfb);
  96
  97   return 23;
  98 }
  99