r17763 by jghali - #11048 : Automatic detection of Ghostscript 64bit on Windows

[scribus-commit]

Author: jghali
Date: Sun Aug 26 18:16:32 2012
New Revision: 17763

URL: http://scribus.net/websvn/listing.php?repname=Scribus&sc=1&rev=17763
Log:
#11048 : Automatic detection of Ghostscript 64bit on Windows

Modified:
    trunk/Scribus/scribus/util_ghostscript.cpp
    trunk/Scribus/scribus/util_ghostscript.h

Modified: trunk/Scribus/scribus/util_ghostscript.cpp
URL: http://scribus.net/websvn/diff.php?repname=Scribus&rev=17763&path=/trunk/Scribus/scribus/util_ghostscript.cpp
==============================================================================
--- trunk/Scribus/scribus/util_ghostscript.cpp (original)
+++ trunk/Scribus/scribus/util_ghostscript.cpp Sun Aug 26 18:16:32 2012
@@ -41,6 +41,12 @@
 
 #if defined(_WIN32)
 #include <windows.h>
+#ifndef KEY_WOW64_32KEY
+	#define KEY_WOW64_32KEY (0x0200)
+#endif
+#ifndef KEY_WOW64_64KEY
+	#define KEY_WOW64_64KEY (0x0100)
+#endif
 #endif
 
 #include "prefsfile.h"
@@ -267,9 +273,29 @@
 	// Set gsName to its default value
 	gsName = "gswin32c.exe";
 
-	QMap<int, QString> gplGS  = getGSExePaths("SOFTWARE\\GPL Ghostscript");
-	QMap<int, QString> afplGS = getGSExePaths("SOFTWARE\\AFPL Ghostscript");
-	QMap<int, QString> gsVersions = gplGS.unite(afplGS);
+	// Test is we are running a 64bit version of WINDOWS
+	bool isWindows64 = false;
+	wchar_t* procArch = _wgetenv(L"PROCESSOR_ARCHITECTURE");
+	if (procArch)
+	{
+		isWindows64 |= (wcscmp(procArch, L"AMD64") == 0);
+		isWindows64 |= (wcscmp(procArch, L"IA64") == 0);
+	}
+	wchar_t* procArchWow64 = _wgetenv(L"PROCESSOR_ARCHITEW6432");
+	if (procArchWow64) isWindows64 = true;
+
+	// Search for Ghostsscript executable in native registry
+	QMap<int, QString> gsVersions;
+	gsVersions.unite( getGSExePaths("SOFTWARE\\GPL Ghostscript") );
+	gsVersions.unite( getGSExePaths("SOFTWARE\\AFPL Ghostscript") );
+
+	// If running on Windows 64bit, search alternate registry view,
+	// ie 32bit registry if process is 64bit, 64bit registry if process is 32bit
+	if (isWindows64)
+	{
+		gsVersions.unite( getGSExePaths("SOFTWARE\\GPL Ghostscript", true) );
+		gsVersions.unite( getGSExePaths("SOFTWARE\\AFPL Ghostscript", true) );
+	}
 
 	if (gsVersions.isEmpty())
 		return gsName;
@@ -308,7 +334,7 @@
 	return gsName;
 }
 
-QMap<int, QString> SCRIBUS_API getGSExePaths(const QString& regKey)
+QMap<int, QString> SCRIBUS_API getGSExePaths(const QString& regKey, bool alternateView)
 {
 	QMap<int, QString> gsVersions;
 #if defined _WIN32
@@ -316,22 +342,35 @@
 	DWORD size;
 	HKEY hKey1, hKey2;
 	DWORD regType = REG_SZ;
+	REGSAM flags  = KEY_READ;
 	WCHAR regVersion[MAX_PATH];
 	WCHAR regPath[MAX_PATH];
 	WCHAR gsPath[MAX_PATH];
-	QString gsVersion, gsName;
-
-	if( RegOpenKeyW(HKEY_LOCAL_MACHINE, (LPCWSTR) regKey.utf16(), &hKey1) == ERROR_SUCCESS )
+	QString gsVersion, gsExeName, gsName;
+
+	bool isWin64Api = false;
+#if defined(_WIN64)
+	isWin64Api = true;
+#endif
+
+	gsExeName = isWin64Api ? "gswin64c.exe" : "gswin32c.exe";
+	if (alternateView)
+	{
+		gsExeName = isWin64Api ? "gswin32c.exe" : "gswin64c.exe";
+		flags |= (isWin64Api ? KEY_WOW64_32KEY : KEY_WOW64_64KEY);
+	}
+
+	if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, (LPCWSTR) regKey.utf16(), 0, flags, &hKey1) == ERROR_SUCCESS)
 	{
 		size = sizeof(regVersion)/sizeof(WCHAR) - 1;
 		DWORD keyIndex = 0;
-		while ( RegEnumKeyExW(hKey1, keyIndex, regVersion, &size, NULL, NULL, NULL, NULL) == ERROR_SUCCESS )
+		while (RegEnumKeyExW(hKey1, keyIndex, regVersion, &size, NULL, NULL, NULL, NULL) == ERROR_SUCCESS)
 		{
 			int gsNumericVer, gsMajor, gsMinor;
 			wcscpy(regPath, (const wchar_t*) regKey.utf16());
 			wcscat(regPath, L"\\");
 			wcscat(regPath, regVersion);
-			if (RegOpenKeyW(HKEY_LOCAL_MACHINE, regPath, &hKey2) == ERROR_SUCCESS)
+			if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, regPath, 0, flags, &hKey2) == ERROR_SUCCESS)
 			{
 				size = sizeof(gsPath) - 1;
 				if (RegQueryValueExW(hKey2, L"GS_DLL", 0, &regType, (LPBYTE) gsPath, &size) == ERROR_SUCCESS)
@@ -346,7 +385,7 @@
 						if (size > 0)
 						{
 							gsName  = gsName.left(size + 1);
-							gsName += "gswin32c.exe";
+							gsName += gsExeName;
 							gsName.replace("\\", "/");
 							gsVersions.insert(gsNumericVer, gsName);
 						}	

Modified: trunk/Scribus/scribus/util_ghostscript.h
URL: http://scribus.net/websvn/diff.php?repname=Scribus&rev=17763&path=/trunk/Scribus/scribus/util_ghostscript.h
==============================================================================
--- trunk/Scribus/scribus/util_ghostscript.h (original)
+++ trunk/Scribus/scribus/util_ghostscript.h Sun Aug 26 18:16:32 2012
@@ -52,5 +52,5 @@
 bool    SCRIBUS_API getNumericGSVersion(int & major, int & minor);
 bool    SCRIBUS_API getNumericGSVersion(const QString& ver, int&major, int& minor);
 QString SCRIBUS_API getGSDefaultExeName(void);
-QMap<int, QString> SCRIBUS_API getGSExePaths(const QString& regKey);
+QMap<int, QString> SCRIBUS_API getGSExePaths(const QString& regKey, bool alternateView = false);
 #endif