Created a Unix sysdep/ folder, and implemented a unix debug_break function

This was SVN commit r735.

source/lib/sysdep/sysdep.cpp

@@ -49,6 +49,8 @@ void debug_break()
 	win_debug_break();
 # elif defined(_M_IX86)
 	ia32_debug_break();
+# elif defined(OS_UNIX)
+	unix_debug_break();
 # else
 #  error "port"
 # endif

source/lib/sysdep/sysdep.h

@@ -1,13 +1,15 @@
 #ifndef SYSDEP_H__
 #define SYSDEP_H__
 
+#include "config.h"
+
 #ifdef _WIN32
 #include "win/win.h"
 #include "win/wdbg.h"
+#elif defined(OS_UNIX)
+#include "unix/unix.h"
 #endif
 
-#include "config.h"
-
 #ifdef __cplusplus
 extern "C" {
 #endif

source/lib/sysdep/unix/unix.cpp

@@ -0,0 +1,12 @@
+#include "precompiled.h"
+
+#include "sysdep/sysdep.h"
+
+#include <sys/types.h>
+#include <signal.h>
+#include <unistd.h>
+
+void unix_debug_break()
+{
+	kill(getpid(), SIGTRAP);
+}

source/lib/sysdep/unix/unix.h

@@ -0,0 +1,10 @@
+#ifndef _sysdep_unix_H
+#define _sysdep_unix_H
+
+/*
+This implementation raises the SIGTRAP signal which should be caught by your
+debugger
+*/
+extern void unix_debug_break();
+
+#endif

source/lib/sysdep/unix/x.cpp

@@ -36,7 +36,7 @@ int get_cur_vmode(int* xres, int* yres, int* bpp, int* freq)
 	if(yres)
 		*yres = XDisplayHeight(disp, screen);
 	if(bpp)
-		*bpp = 0;
+		*bpp = XDefaultDepth(disp, screen);
 	if(freq)
 		*freq = 0;
 	XCloseDisplay(disp);
@@ -48,7 +48,17 @@ int get_cur_vmode(int* xres, int* yres, int* bpp, int* freq)
 // if we fail, outputs are unchanged (assumed initialized to defaults)
 int get_monitor_size(int& width_mm, int& height_mm)
 {
-	return -1;
+	Display* disp = XOpenDisplay(0);
+	if(!disp)
+		return -1;
+
+	int screen = XDefaultScreen(disp);
+	
+	width_mm=XDisplayWidthMM(disp, screen);
+	height_mm=XDisplayHeightMM(disp, screen);
+	
+	XCloseDisplay(disp);
+	return 0;
 }