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 #include "dfb_api.h"
  14
  15 #define MY_FONT_HEIGHT 18
  16
  17 /* global stuff */
  18
  19 /* well ... */
  20 IDirectFB *dfb = NULL;
  21
  22 IDirectFBSurface *primary = NULL;
  23 IDirectFBSurface *logo = NULL;
  24 IDirectFBSurface *video = NULL;
  25 IDirectFBSurface *window = NULL;
  26
  27 IDirectFBImageProvider *image_provider = NULL;
  28 IDirectFBVideoProvider *video_provider = NULL;
  29
  30 int screen_width  = 0;
  31 int screen_height = 0;
  32
  33 char dfb_video_dev[]=VIDEO_DEV;
  34 char text_top[]="Internet Video / Audio Conferencing";
  35 char dfb_image[]="./images/ivac_logo.png";
  36 char dfb_font[]="./fonts/decker.ttf";
  37
  38 /* variable definitions */
  39 // struct user_info {
  40
  41
  42 /* functions */
  43
  44 int dfb_init(int *argc,char **argv) {
  45  DirectFBInit(argc,&argv);
  46  DirectFBCreate(&dfb);
  47  dfb->SetCooperativeLevel(dfb,DFSCL_FULLSCREEN);
  48  return 1;
  49 }
  50
  51 int check_accel(void) {
  52  DFBCardCapabilities caps;
  53  dfb->GetCardCapabilities(dfb,&caps);
  54  return (caps.acceleration_mask);
  55 }
  56
  57 int create_primary_surface(void) {
  58  DFBSurfaceDescription desc;
  59  memset(&desc,0,sizeof(DFBSurfaceDescription));
  60  desc.flags=DSDESC_CAPS;
  61  desc.caps=DSCAPS_PRIMARY|DSCAPS_FLIPPING;
  62  dfb->CreateSurface(dfb,&desc,&primary);
  63  return 1;
  64 }
  65
  66 int get_surface_size(IDirectFBSurface *surface,int *width,int *height) {
  67  surface->GetSize(surface,width,height);
  68  return 1;
  69 }
  70
  71 int get_primary_surface_size(void) {
  72  get_surface_size(primary,&screen_width,&screen_height);
  73  return 1;
  74 }
  75
  76 int create_logo_surface(void) {
  77  DFBSurfaceDescription desc;
  78  DFBImageDescription image_desc;
  79  dfb->CreateImageProvider(dfb,dfb_image,&image_provider);
  80  image_provider->GetSurfaceDescription(image_provider,&desc);
  81  image_provider->GetImageDescription(image_provider,&image_desc);
  82  printf("image description: caps=%x red=%hhd green=%hhd blue=%hhd\n",image_desc.caps,
  83                                                         image_desc.colorkey_r,
  84                                                         image_desc.colorkey_g,
  85                                                         image_desc.colorkey_b);
  86  dfb->CreateSurface(dfb,&desc,&logo);
  87  image_provider->RenderTo(image_provider,logo,NULL);
  88  image_provider->Release(image_provider);
  89  return 1;
  90 }
  91
  92 int create_video_surface(void) {
  93  float q;
  94  DFBSurfaceDescription desc;
  95  DFBVideoProviderCapabilities caps;
  96  dfb->CreateVideoProvider(dfb,dfb_video_dev,&video_provider);
  97  video_provider->GetSurfaceDescription(video_provider,&desc);
  98  q=(((float)screen_height/desc.height>=(float)screen_width/desc.width)?
  99   (float)screen_height/desc.height:(float)screen_width/desc.width);
 100  desc.width=(int)(screen_width/q);
 101  desc.height=(int)(screen_height/q);
 102  video_provider->GetCapabilities(video_provider,&caps);
 103  printf("video capabilities: %x\n",caps);
 104  dfb->CreateSurface(dfb,&desc,&video);
 105  video_provider->PlayTo(video_provider,video,NULL,video_callback,NULL);
 106  video_provider->Release(video_provider);
 107  return 1;
 108 }
 109
 110 int clear_screen(IDirectFBSurface *surface) {
 111  surface->FillRectangle(surface,0,0,screen_width,screen_height);
 112  return 1;
 113 }
 114
 115 int release_surface(IDirectFBSurface *surface) {
 116  surface->Release(surface);
 117  return 1;
 118 }
 119
 120 int release_dfb(void) {
 121  dfb->Release(dfb);
 122  return 1;
 123 }
 124
 125 int blit_surface(IDirectFBSurface *source,int x,int y) {
 126  primary->Blit(primary,source,NULL,x,y);
 127  return 1;
 128 }
 129
 130 int blit_logo(void) {
 131  int x,y;
 132  get_surface_size(logo,&x,&y);
 133  printf("size of logo width/height: %d/%d\n",x,y);
 134  blit_surface(logo,((screen_width-x)/2),((screen_height-y)/2));
 135  return 1;
 136 }
 137
 138 int blit_video(void) {
 139  int x,y;
 140  get_surface_size(video,&x,&y);
 141  printf("size of logo width/height: %d/%d\n",x,y);
 142  // blit_surface(video,((screen_width-x)/2),((screen_height-y)/2));
 143  blit_surface(video,0,0);
 144  return 1;
 145 }
 146
 147 int flip_it(void) {
 148  primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC);
 149  return 1;
 150 }
 151
 152 DVFrameCallback video_callback(void) {
 153  puts("callback flip");
 154  flip_it;
 155  return DFENUM_OK;
 156 }
 157
 158 /* test api app */
 159 int main (int argc, char **argv) {
 160
 161  dfb_init(&argc,argv);
 162
 163  check_accel();
 164
 165  create_primary_surface();
 166
 167  // create_video_surface();
 168  create_logo_surface();
 169
 170  get_primary_surface_size();
 171  printf("primary surface width/height: %d/%d\n",screen_width,screen_height);
 172
 173  clear_screen(primary);
 174
 175  puts("main: blit video");
 176  // blit_video();
 177  blit_logo();
 178
 179  // puts("main: flip");
 180  flip_it();
 181
 182  sleep(10);
 183
 184  release_surface(logo);
 185
 186  release_surface(primary);
 187
 188  release_dfb();
 189
 190  return 1;
 191 }