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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "Ecore_Fb.h"
#include "ecore_fb_private.h"
#include <limits.h>
static void _ecore_fb_size_get(const char *name, int *w, int *h);
static int _ecore_fb_init_count = 0;
static int _ecore_fb_console_w = 0;
static int _ecore_fb_console_h = 0;
/**
* @addtogroup Ecore_FB_Group Ecore_FB - Frame buffer convenience functions.
*
* @{
*/
static sighandler_t oldhand = NULL;
static void
nosigint(int val EINA_UNUSED)
{
}
/**
* @brief Initialize the Ecore_Fb library.
*
* @param name Device target name.
* @return 1 or greater on success, 0 on error.
*
* This function sets up all the Ecore_Fb library. It returns 0 on
* failure, otherwise it returns the number of times it has already
* been called.
*
* When Ecore_Fb is not used anymore, call ecore_fb_shutdown() to shut down
* the Ecore_Fb library.
*/
EAPI int
ecore_fb_init(const char *name)
{
const char *s;
if (++_ecore_fb_init_count != 1)
return _ecore_fb_init_count;
s = getenv("ECORE_FB_NO_VT");
if ((!s) || (atoi(s) == 0))
{
if (!ecore_fb_vt_init())
return --_ecore_fb_init_count;
}
if (!oldhand)
{
oldhand = signal(SIGINT, nosigint);
}
_ecore_fb_size_get(name, &_ecore_fb_console_w, &_ecore_fb_console_h);
return _ecore_fb_init_count;
}
/**
* @brief Shut down the Ecore_Fb library.
*
* @return 0 when the library is completely shut down, 1 or
* greater otherwise.
*
* This function shuts down the Ecore_Fb library. It returns 0 when it has
* been called the same number of times than ecore_fb_init().
*/
EAPI int
ecore_fb_shutdown(void)
{
const char *s;
if (--_ecore_fb_init_count != 0)
return _ecore_fb_init_count;
if (oldhand)
{
signal(SIGINT, oldhand);
oldhand = NULL;
}
s = getenv("ECORE_FB_NO_VT");
if ((!s) || (atoi(s) == 0))
{
ecore_fb_vt_shutdown();
}
return _ecore_fb_init_count;
}
/**
* @brief Retrieve the width and height of the current frame buffer in
* pixels.
*
* @param w Pointer to an integer in which to store the width.
* @param h Pointer to an interge in which to store the height.
*
* This function retrieves the size of the current frame buffer in
* pixels. @p w and @p h can be buffers that will be filled with the
* corresponding values. If one of them is @c NULL, nothing will be
* done for that parameter.
*/
EAPI void
ecore_fb_size_get(int *w, int *h)
{
if (w) *w = _ecore_fb_console_w;
if (h) *h = _ecore_fb_console_h;
}
static void
_ecore_fb_size_get(const char *name, int *w, int *h)
{
struct fb_var_screeninfo fb_var;
int fb;
const char *s;
if ((s = getenv("EVAS_FB_DEV")) &&
(((!strncmp(s, "/dev/fb", 7)) &&
((s[7] >= '0' && s[7] <= '9') || (s[7] == 0))) ||
((!strncmp(s, "/dev/fb/", 8)) && (s[8] != '.'))))
{
fb = open(s, O_RDWR);
if (fb < 0)
fprintf(stderr, "[ecore_fb] error opening $EVAS_FB_DEV=%s: %s\n", s, strerror(errno));
}
else
{
char dev[PATH_MAX];
int device;
/* consistent with ecore_evas_default_display in ecore_evas_fb.c */
if (!name) name = "0";
/* consistent with ecore_evas_fb.c -> evas_fb_main.c */
device = strtol(name, NULL, 10);
snprintf(dev, sizeof(dev), "/dev/fb/%i", device);
fb = open(dev, O_RDWR);
if (fb == -1)
{
snprintf(dev, sizeof(dev), "/dev/fb%i", device);
fb = open(dev, O_RDWR);
if (fb < 0)
fprintf(stderr, "[ecore_fb] error opening /dev/fb/%i and /dev/fb%i: %s\n", device, device, strerror(errno));
}
}
if (fb < 0)
goto exit;
if (ioctl(fb, FBIOGET_VSCREENINFO, &fb_var) == -1)
{
perror("[ecore_fb] ioctl FBIOGET_VSCREENINFO");
goto err_ioctl;
}
*w = fb_var.xres;
*h = fb_var.yres;
err_ioctl:
close(fb);
exit:
return;
}
/**
* @}
*/
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