/* xscreensaver, Copyright (c) 2016 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* Utility functions related to the hacks/ APIs.
*/
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include <sys/utsname.h>
#include <android/log.h>
#include "screenhackI.h"
#include "xlockmoreI.h"
#include "textclient.h"
#if defined(USE_IPHONE) || (HAVE_ANDROID)
# include "jwzgles.h"
#else
# include <OpenGL/OpenGL.h>
#endif
#ifndef isupper
# define isupper(c) ((c) >= 'A' && (c) <= 'Z')
#endif
#ifndef _tolower
# define _tolower(c) ((c) - 'A' + 'a')
#endif
Bool
get_boolean_resource (Display *dpy, char *res_name, char *res_class)
{
char *tmp, buf [100];
char *s = get_string_resource (dpy, res_name, res_class);
char *os = s;
if (! s) return 0;
for (tmp = buf; *s; s++)
*tmp++ = isupper (*s) ? _tolower (*s) : *s;
*tmp = 0;
free (os);
while (*buf &&
(buf[strlen(buf)-1] == ' ' ||
buf[strlen(buf)-1] == '\t'))
buf[strlen(buf)-1] = 0;
if (!strcmp (buf, "on") || !strcmp (buf, "true") || !strcmp (buf, "yes"))
return 1;
if (!strcmp (buf,"off") || !strcmp (buf, "false") || !strcmp (buf,"no"))
return 0;
fprintf (stderr, "%s: %s must be boolean, not %s.\n",
progname, res_name, buf);
return 0;
}
int
get_integer_resource (Display *dpy, char *res_name, char *res_class)
{
int val;
char c, *s = get_string_resource (dpy, res_name, res_class);
char *ss = s;
if (!s) return 0;
while (*ss && *ss <= ' ') ss++; /* skip whitespace */
if (ss[0] == '0' && (ss[1] == 'x' || ss[1] == 'X')) /* 0x: parse as hex */
{
if (1 == sscanf (ss+2, "%x %c", (unsigned int *) &val, &c))
{
free (s);
return val;
}
}
else /* else parse as dec */
{
/* Allow integer values to end in ".0". */
int L = strlen(ss);
if (L > 2 && ss[L-2] == '.' && ss[L-1] == '0')
ss[L-2] = 0;
if (1 == sscanf (ss, "%d %c", &val, &c))
{
free (s);
return val;
}
}
fprintf (stderr, "%s: %s must be an integer, not %s.\n",
progname, res_name, s);
free (s);
return 0;
}
double
get_float_resource (Display *dpy, char *res_name, char *res_class)
{
double val;
char c, *s = get_string_resource (dpy, res_name, res_class);
if (! s) return 0.0;
if (1 == sscanf (s, " %lf %c", &val, &c))
{
free (s);
return val;
}
fprintf (stderr, "%s: %s must be a float, not %s.\n",
progname, res_name, s);
free (s);
return 0.0;
}
char *
textclient_mobile_date_string (void)
{
struct utsname uts;
if (uname (&uts) < 0)
return strdup("uname() failed");
else
{
time_t now = time ((time_t *) 0);
char *ts = ctime (&now);
char *buf, *s;
if ((s = strchr(uts.nodename, '.')))
*s = 0;
buf = (char *) malloc(strlen(uts.machine) +
strlen(uts.sysname) +
strlen(uts.release) +
strlen(ts) + 10);
sprintf (buf, "%s %s %s\n%s", uts.machine, uts.sysname, uts.release, ts);
return buf;
}
}
/* used by the OpenGL screen savers
*/
/* Does nothing - prepareContext already did the work.
*/
void
glXMakeCurrent (Display *dpy, Window window, GLXContext context)
{
}
/* clear away any lingering error codes */
void
clear_gl_error (void)
{
while (glGetError() != GL_NO_ERROR)
;
}
// needs to be implemented in Android...
/* Copy the back buffer to the front buffer.
*/
void
glXSwapBuffers (Display *dpy, Window window)
{
}
/* Called by OpenGL savers using the XLockmore API.
*/
GLXContext *
init_GL (ModeInfo *mi)
{
// Window win = mi->window;
// Caller expects a pointer to an opaque struct... which it dereferences.
// Don't ask me, it's historical...
static int blort = -1;
return (void *) &blort;
}
/* report a GL error. */
void
check_gl_error (const char *type)
{
char buf[100];
GLenum i;
const char *e;
switch ((i = glGetError())) {
case GL_NO_ERROR: return;
case GL_INVALID_ENUM: e = "invalid enum"; break;
case GL_INVALID_VALUE: e = "invalid value"; break;
case GL_INVALID_OPERATION: e = "invalid operation"; break;
case GL_STACK_OVERFLOW: e = "stack overflow"; break;
case GL_STACK_UNDERFLOW: e = "stack underflow"; break;
case GL_OUT_OF_MEMORY: e = "out of memory"; break;
#ifdef GL_TABLE_TOO_LARGE_EXT
case GL_TABLE_TOO_LARGE_EXT: e = "table too large"; break;
#endif
#ifdef GL_TEXTURE_TOO_LARGE_EXT
case GL_TEXTURE_TOO_LARGE_EXT: e = "texture too large"; break;
#endif
default:
e = buf; sprintf (buf, "unknown GL error %d", (int) i); break;
}
__android_log_write(ANDROID_LOG_ERROR, "xscreensaver", e);
}
