src/lib/ecore_fb/ecore_fb.c

   1 /*
   2  * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
   3  */
   4
   5 #ifdef HAVE_CONFIG_H
   6 # include <config.h>
   7 #endif
   8
   9 #include "Ecore_Fb.h"
  10 #include "ecore_fb_private.h"
  11
  12 static void _ecore_fb_size_get(int *w, int *h);
  13
  14 EAPI int ECORE_FB_EVENT_KEY_DOWN = 0;
  15 EAPI int ECORE_FB_EVENT_KEY_UP = 0;
  16 EAPI int ECORE_FB_EVENT_MOUSE_BUTTON_DOWN = 0;
  17 EAPI int ECORE_FB_EVENT_MOUSE_BUTTON_UP = 0;
  18 EAPI int ECORE_FB_EVENT_MOUSE_MOVE = 0;
  19 EAPI int ECORE_FB_EVENT_MOUSE_WHEEL = 0;
  20
  21 static int _ecore_fb_init_count = 0;
  22 static int _ecore_fb_console_w = 0;
  23 static int _ecore_fb_console_h = 0;
  24
  25 static double _ecore_fb_double_click_time = 0.25;
  26
  27
  28 /**
  29  * @defgroup Ecore_FB_Library_Group Framebuffer Library Functions
  30  *
  31  * Functions used to set up and shut down the Ecore_Framebuffer functions.
  32  */
  33
  34 /**
  35  * Sets up the Ecore_Fb library.
  36  * @param   name device target name
  37  * @return  @c 0 on failure.  Otherwise, the number of times the library has
  38  *          been initialised without being shut down.
  39  * @ingroup Ecore_FB_Library_Group
  40  */
  41 EAPI int
  42 ecore_fb_init(const char *name __UNUSED__)
  43 {
  44    if (++_ecore_fb_init_count != 1)
  45      return _ecore_fb_init_count;
  46
  47    if (!ecore_fb_vt_init())
  48      return --_ecore_fb_init_count;
  49
  50    ECORE_FB_EVENT_KEY_DOWN          = ecore_event_type_new();
  51    ECORE_FB_EVENT_KEY_UP            = ecore_event_type_new();
  52    ECORE_FB_EVENT_MOUSE_BUTTON_DOWN = ecore_event_type_new();
  53    ECORE_FB_EVENT_MOUSE_BUTTON_UP   = ecore_event_type_new();
  54    ECORE_FB_EVENT_MOUSE_MOVE        = ecore_event_type_new();
  55    ECORE_FB_EVENT_MOUSE_WHEEL       = ecore_event_type_new();
  56    _ecore_fb_size_get(&_ecore_fb_console_w, &_ecore_fb_console_h);
  57
  58    return _ecore_fb_init_count;
  59 }
  60
  61 /**
  62  * Shuts down the Ecore_Fb library.
  63  * @return  @c The number of times the system has been initialised without
  64  *             being shut down.
  65  * @ingroup Ecore_FB_Library_Group
  66  */
  67 EAPI int
  68 ecore_fb_shutdown(void)
  69 {
  70    if (--_ecore_fb_init_count != 0)
  71      return _ecore_fb_init_count;
  72
  73    ecore_fb_vt_shutdown();
  74
  75    return _ecore_fb_init_count;
  76 }
  77
  78
  79 /**
  80  * Retrieves the width and height of the current frame buffer in pixels.
  81  * @param w Pointer to an integer in which to store the width.
  82  * @param h Pointer to an interge in which to store the height.
  83  */
  84 EAPI void
  85 ecore_fb_size_get(int *w, int *h)
  86 {
  87    if (w) *w = _ecore_fb_console_w;
  88    if (h) *h = _ecore_fb_console_h;
  89 }
  90
  91 static void
  92 _ecore_fb_size_get(int *w, int *h)
  93 {
  94    struct fb_var_screeninfo fb_var;
  95    int fb;
  96
  97    fb = open("/dev/fb0", O_RDWR);
  98    if (fb < 0)
  99      {
 100         if (w) *w = 0;
 101         if (h) *h = 0;
 102         return;
 103      }
 104    if (ioctl(fb, FBIOGET_VSCREENINFO, &fb_var) == -1)
 105      {
 106         if (w) *w = 0;
 107         if (h) *h = 0;
 108         return;
 109      }
 110    close(fb);
 111    if (w) *w = fb_var.xres;
 112    if (h) *h = fb_var.yres;
 113 }