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/**
* Copyright 2011 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
#include <XineramaHelper.h>
#include <stdio.h>
#include <dlfcn.h>
// #define DEBUG 1
static const char* XinExtName = "XINERAMA";
#ifdef __sun_obsolete
static const char* XineramaLibNames[] = { "libXext.so", NULL } ;
static const char* XineramaGetInfoName = "XineramaGetInfo";
typedef Status (* PFNXineramaGetInfoPROC) (Display* display, int screen_number,
XRectangle* framebuffer_rects, unsigned char* framebuffer_hints,
int* num_framebuffers);
#else
static const char* XineramaLibNames[]= { "libXinerama.so.1", "libXinerama.so", NULL };
static const char* XineramaIsActiveName = "XineramaIsActive";
typedef Bool (* PFNXineramaIsActivePROC) (Display *display);
#endif
static Bool XineramaIsEnabledPlatform(void *xineramaQueryFunc, Display* display) {
Bool res = False;
#ifdef __sun_obsolete
#define MAXFRAMEBUFFERS 16
unsigned char fbhints[MAXFRAMEBUFFERS];
XRectangle fbrects[MAXFRAMEBUFFERS];
int locNumScr = 0;
if(NULL!=xineramaQueryFunc && NULL!=display) {
PFNXineramaGetInfoPROC XineramaSolarisPROC = (PFNXineramaGetInfoPROC)xineramaQueryFunc;
res = XineramaSolarisPROC(display, 0, &fbrects[0], &fbhints[0], &locNumScr) != 0;
}
#else
if(NULL!=xineramaQueryFunc && NULL!=display) {
PFNXineramaIsActivePROC XineramaIsActivePROC = (PFNXineramaIsActivePROC) xineramaQueryFunc;
res = XineramaIsActivePROC(display);
}
#endif
return res;
}
void* XineramaGetLibHandle() {
void* xineramaLibHandle = NULL;
int i;
for(i=0; NULL==xineramaLibHandle && NULL!=XineramaLibNames[i]; i++) {
xineramaLibHandle = dlopen(XineramaLibNames[i], RTLD_LAZY | RTLD_GLOBAL);
}
#ifdef DEBUG
if(NULL!=xineramaLibHandle) {
fprintf(stderr, "XineramaGetLibHandle: using lib %s -> %p\n", XineramaLibNames[i-1], xineramaLibHandle);
} else {
fprintf(stderr, "XineramaGetLibHandle: no native lib available\n");
}
#endif
return xineramaLibHandle;
}
Bool XineramaReleaseLibHandle(void* xineramaLibHandle) {
#ifdef DEBUG
fprintf(stderr, "XineramaReleaseLibHandle: release lib %p\n", xineramaLibHandle);
#endif
if(NULL==xineramaLibHandle) {
return False;
}
return 0 == dlclose(xineramaLibHandle) ? True : False;
}
void* XineramaGetQueryFunc(void *xineramaLibHandle) {
void * funcptr = NULL;
if(NULL==xineramaLibHandle) {
return NULL;
}
#ifdef __sun_obsolete
#ifdef DEBUG
fprintf(stderr, "XineramaGetQueryFunc: trying func %p -> %s\n", xineramaLibHandle, XineramaGetInfoName);
#endif
funcptr = dlsym(xineramaLibHandle, XineramaGetInfoName);
#else
#ifdef DEBUG
fprintf(stderr, "XineramaGetQueryFunc: trying func %p -> %s\n", xineramaLibHandle, XineramaIsActiveName);
#endif
funcptr = dlsym(xineramaLibHandle, XineramaIsActiveName);
#endif
#ifdef DEBUG
fprintf(stderr, "XineramaGetQueryFunc: got func %p\n", funcptr);
#endif
return funcptr;
}
Bool XineramaIsEnabled(void *xineramaQueryFunc, Display* display) {
int32_t major_opcode, first_event, first_error;
Bool gotXinExt = False;
Bool res = False;
if(NULL==xineramaQueryFunc || NULL==display) {
return False;
}
gotXinExt = XQueryExtension(display, XinExtName, &major_opcode,
&first_event, &first_error);
#ifdef DEBUG
fprintf(stderr, "XineramaIsEnabled: has Xinerama Ext: ext %d, query-func %p\n", gotXinExt, xineramaQueryFunc);
#endif
if(gotXinExt) {
res = XineramaIsEnabledPlatform(xineramaQueryFunc, display);
}
return res;
}
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