dfb_api.c

   1 /*
   2  * dfb_api.c - api to dfb interface
   3  */
   4
   5 /* std includes */
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <unistd.h>
   9
  10 /* dfb includes */
  11 #include <directfb.h>
  12
  13 #define MY_FONT_HEIGHT 18
  14
  15 /* global stuff */
  16
  17 /* well ... */
  18 IDirectFB *dfb = NULL;
  19
  20 IDirectFBSurface *primary = NULL;
  21 IDirectFBSurface *logo = NULL;
  22 IDirectFBSurface *video = NULL;
  23 IDirectFBSurface *window = NULL;
  24
  25 IDirectFBImageProvider *image_provider = NULL;
  26 IDirectFBVideoProvider *video_provider = NULL;
  27
  28 int screen_width  = 0;
  29 int screen_height = 0;
  30
  31 char dfb_video_dev[]="/dev/v4l/video0";
  32 char text_top[]="Internet Video / Audio Conferencing";
  33 char dfb_image[]="./images/ivac_logo.png";
  34 char dfb_font[]="./fonts/decker.ttf";
  35
  36 /* small api - directfb usage kinda sux: foo->bar(foo,...) wtf?!?!?! */
  37
  38 int dfb_init(int *argc,char **argv) {
  39  DirectFBInit(argc,&argv);
  40  DirectFBCreate(&dfb);
  41  dfb->SetCooperativeLevel(dfb,DFSCL_FULLSCREEN);
  42  return 1;
  43 }
  44
  45 int check_accel(void) {
  46  DFBCardCapabilities caps;
  47  dfb->GetCardCapabilities(dfb,&caps);
  48  return (caps.acceleration_mask);
  49 }
  50
  51 int create_primary_surface(void) {
  52  DFBSurfaceDescription desc;
  53  memset(&desc,0,sizeof(DFBSurfaceDescription));
  54  desc.flags=DSDESC_CAPS;
  55  desc.caps=DSCAPS_PRIMARY;
  56  dfb->CreateSurface(dfb,&desc,&primary);
  57  return 1;
  58 }
  59
  60 int get_surface_size(IDirectFBSurface *surface,int *width,int *height) {
  61  surface->GetSize(surface,width,height);
  62  return 1;
  63 }
  64
  65 int get_primary_surface_size(void) {
  66  get_surface_size(primary,&screen_width,&screen_height);
  67  return 1;
  68 }
  69
  70 int create_logo_surface(void) {
  71  DFBSurfaceDescription desc;
  72  DFBImageDescription image_desc;
  73  dfb->CreateImageProvider(dfb,dfb_image,&image_provider);
  74  image_provider->GetSurfaceDescription(image_provider,&desc);
  75  image_provider->GetImageDescription(image_provider,&image_desc);
  76  printf("image description: caps=%x red=%hhd green=%hhd blue=%hhd\n",image_desc.caps,
  77                                                         image_desc.colorkey_r,
  78                                                         image_desc.colorkey_g,
  79                                                         image_desc.colorkey_b);
  80  dfb->CreateSurface(dfb,&desc,&logo);
  81  image_provider->RenderTo(image_provider,logo,NULL);
  82  image_provider->Release(image_provider);
  83  return 1;
  84 }
  85
  86 int create_video_surface(void) {
  87  DFBSurfaceDescription desc;
  88  DFBVideoProviderCapabilities caps;
  89  dfb->CreateVideoProvider(dfb,dfb_video_dev,&video_provider);
  90  video_provider->GetSurfaceDescription(video_provider,&desc);
  91  video_provider->GetCapabilities(video_provider,&caps);
  92  printf("video capabilities: %x\n",caps);
  93  dfb->CreateSurface(dfb,&desc,&video);
  94  video_provider->PlayTo(video_provider,video,NULL,NULL,NULL);
  95  video_provider->Release(video_provider);
  96  return 1;
  97 }
  98
  99 int clear_screen(IDirectFBSurface *surface) {
 100  surface->FillRectangle(surface,0,0,screen_width,screen_height);
 101  return 1;
 102 }
 103
 104 int release_surface(IDirectFBSurface *surface) {
 105  surface->Release(surface);
 106  return 1;
 107 }
 108
 109 int release_dfb(void) {
 110  dfb->Release(dfb);
 111  return 1;
 112 }
 113
 114
 115 /* test api app */
 116 int main (int argc, char **argv) {
 117
 118  dfb_init(&argc,argv);
 119
 120  check_accel();
 121
 122  create_primary_surface();
 123  printf("primary surface created\n");
 124
 125  // create_video_surface();
 126  create_logo_surface();
 127
 128  get_primary_surface_size();
 129
 130  clear_screen(primary);
 131
 132  // primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC);
 133
 134  sleep(5);
 135
 136  release_surface(primary);
 137
 138  return 1;
 139 }