dfb-photoshow.c

   1 /*
   2  * dfb-photoshow.c
   3  *
   4  * build: gcc -o dfb-photoshow -O3 -Wall -I/usr/X11/include \
   5  *        -I/usr/include/directfb dfb-photoshow.c
   6  * usage: ./showdir <seconds> <directory>
   7  *
   8  * author:
   9  * hackbard@hackdaworld.dyndns.org
  10  * download:
  11  * cvs -d:pserver:anonymous@hackdaworld.dyndns.org:/my-code co dfb-photoshow
  12  *
  13  */
  14
  15 #include <stdio.h>
  16 #include <unistd.h>
  17 #include <stdlib.h>
  18 #include <directfb.h>
  19
  20 IDirectFB *dfb = NULL;
  21 IDirectFBSurface *primary = NULL;
  22 int screen_width  = 0;
  23 int screen_height = 0;
  24
  25 #define DFBCHECK(x...) \
  26 { \
  27  DFBResult err=x; \
  28  if(err!=DFB_OK) { \
  29   fprintf(stderr,"file: %s , line: %d !\n\t",__FILE__,__LINE__); \
  30   DirectFBErrorFatal( #x, err ); \
  31  } \
  32 }
  33
  34 IDirectFBInputDevice *keyboard=NULL;
  35 IDirectFBSurface *logo=NULL;
  36 IDirectFBFont *font=NULL;
  37 IDirectFBEventBuffer *k_buf=NULL;
  38
  39 char *title_txt="directfb photoshow";
  40 char *exp_txt="an image presenter ...";
  41 char *hp_txt="http://hackdaworld.dyndns.org";
  42 char *msg1_txt="(press key to continue, space pauses, left key for last image, esc quits ...)";
  43
  44 void clear_primary(void) {
  45  DFBCHECK(primary->SetColor(primary,0x00,0x00,0x00,0x00));
  46  DFBCHECK(primary->FillRectangle(primary,0,0,screen_width,screen_height));
  47 }
  48
  49 int main(int argc,char **argv) {
  50  int i,str_width;
  51  DFBInputEvent k_event;
  52  DFBSurfaceDescription dsc;
  53  DFBFontDescription font_dsc;
  54  IDirectFBImageProvider *img_prov;
  55
  56  DFBCHECK(DirectFBInit (&argc, &argv));
  57
  58  DFBCHECK(DirectFBCreate(&dfb));
  59  DFBCHECK(dfb->SetCooperativeLevel(dfb,DFSCL_FULLSCREEN));
  60
  61  dsc.flags=DSDESC_CAPS;
  62  dsc.caps=DSCAPS_PRIMARY|DSCAPS_FLIPPING;
  63  DFBCHECK(dfb->CreateSurface(dfb,&dsc,&primary));
  64
  65  DFBCHECK(primary->GetSize(primary,&screen_width,&screen_height));
  66  fprintf(stdout,"dimensions: %dx%d\n",screen_width,screen_height);
  67
  68  DFBCHECK(dfb->GetInputDevice(dfb,DIDID_KEYBOARD,&keyboard));
  69  DFBCHECK(keyboard->CreateEventBuffer(keyboard,&k_buf));
  70
  71  /* title */
  72  font_dsc.flags=DFDESC_HEIGHT;
  73  font_dsc.height=screen_height/20;
  74  DFBCHECK(dfb->CreateFont(dfb,"/usr/share/DFBSee/decker.ttf",&font_dsc,&font));
  75  DFBCHECK(primary->SetFont(primary,font));
  76  DFBCHECK(font->GetStringWidth(font,title_txt,-1,&str_width));
  77  clear_primary();
  78  DFBCHECK(primary->SetColor(primary,0x80,0x80,0xff,0xff));
  79  DFBCHECK(primary->DrawString(primary,title_txt,-1,(screen_width-str_width)/2,screen_height/4,DSTF_LEFT));
  80  /* explanation,homepage,msg */
  81  font_dsc.height=screen_height/40;
  82  DFBCHECK(dfb->CreateFont(dfb,"/usr/share/DFBSee/decker.ttf",&font_dsc,&font));
  83  DFBCHECK(primary->SetFont(primary,font));
  84  DFBCHECK(font->GetStringWidth(font,exp_txt,-1,&str_width));
  85  DFBCHECK(primary->DrawString(primary,exp_txt,-1,(screen_width-str_width)/2,screen_height/2,DSTF_LEFT));
  86  DFBCHECK(font->GetStringWidth(font,hp_txt,-1,&str_width));
  87  DFBCHECK(primary->DrawString(primary,hp_txt,-1,(screen_width-str_width)/2,(screen_height/2)+font_dsc.height,DSTF_LEFT));
  88  DFBCHECK(font->GetStringWidth(font,msg1_txt,-1,&str_width));
  89  DFBCHECK(primary->DrawString(primary,msg1_txt,-1,(screen_width-str_width)/2,(screen_height/2)+3*font_dsc.height,DSTF_LEFT));
  90  DFBCHECK(primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC));
  91  DFBCHECK(k_buf->WaitForEvent(k_buf));
  92
  93  /* display pictures */
  94  i=2;
  95  while(i<argc) {
  96   do {
  97    printf("image: %s\n",argv[i]);
  98    if((int)k_buf->GetEvent(k_buf,DFB_EVENT(&k_event))!=0) {
  99     if(k_event.type==DIET_KEYPRESS) {
 100      int a;
 101      a=(int)k_event.key_id;
 102      if(a==(int)DIKI_ESCAPE) {
 103       i=argc;
 104       break;
 105      }
 106      if(a==(int)DIKI_SPACE) {
 107       char *pause_txt="paused (press button to continue)";
 108       DFBCHECK(font->GetStringWidth(font,pause_txt,-1,&str_width));
 109       DFBCHECK(primary->SetColor(primary,0x80,0x80,0xff,0xff));
 110       DFBCHECK(primary->DrawString(primary,pause_txt,-1,(screen_width-str_width)/2,screen_height/2,DSTF_LEFT));
 111       DFBCHECK(primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC));
 112       DFBCHECK(k_buf->Reset(k_buf));
 113       DFBCHECK(k_buf->WaitForEvent(k_buf));
 114       k_event.key_id=DIKI_A; /* no longer pause! */
 115      }
 116      if(a==(int)DIKI_LEFT) {
 117       i=((i<=3)?2:i-2);
 118       k_event.key_id=DIKI_A; /* no longer back key! */
 119       break;
 120      }
 121     }
 122    }
 123    DFBCHECK(dfb->CreateImageProvider(dfb,argv[i],&img_prov));
 124    DFBCHECK(img_prov->GetSurfaceDescription(img_prov,&dsc));
 125    if((screen_width<dsc.width)||(screen_height<dsc.height)) {
 126     float q_w=(float)(dsc.width)/screen_width;
 127     float q_h=(float)(dsc.height)/screen_height;
 128     if(q_w>=q_h) {
 129      dsc.width=(int)(dsc.width/q_w);
 130      dsc.height=(int)(dsc.height/q_w);
 131     } else {
 132      dsc.width=(int)(dsc.width/q_h);
 133      dsc.height=(int)(dsc.height/q_h);
 134     }
 135    }
 136    DFBCHECK(dfb->CreateSurface(dfb,&dsc,&logo ));
 137    DFBCHECK(img_prov->RenderTo(img_prov,logo,NULL));
 138    img_prov->Release(img_prov);
 139    clear_primary();
 140    DFBCHECK(primary->Blit(primary,logo,NULL,(screen_width-dsc.width)/2,(screen_height-dsc.height)/2));
 141    DFBCHECK(primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC));
 142    DFBCHECK(k_buf->Reset(k_buf));
 143    k_buf->WaitForEventWithTimeout(k_buf,atoi(argv[1]),0);
 144    logo->Release(logo);
 145    ++i;
 146    if(i==argc) break;
 147   } while(k_buf->GetEvent(k_buf,DFB_EVENT(&k_event))==DFB_OK);
 148  }
 149
 150  font->Release(font);
 151  k_buf->Release(k_buf);
 152  keyboard->Release(keyboard);
 153  logo->Release(logo);
 154  primary->Release(primary);
 155  dfb->Release(dfb);
 156
 157  return 23; /* ;) */
 158 }