Improve Direct X SDK detection in configure.exe

Check presence of Direct X SDK depending on
compiler version.

Check for presence of the headers d3dcompile.h and
intrin.h (SSE2) as well as d3d9.lib and the shader
compiler since the header d3dcompile.h is
also present in MinGW.

Change-Id: I7ee9701f4f9dc175ed2d733db79dda46de4d69f1
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/angle/src/libGLESv2/libGLESv2.pro

@@ -7,6 +7,7 @@ include(../common/common.pri)
 
 INCLUDEPATH += $$OUT_PWD/..
 
+# Remember to adapt tools/configure/configureapp.cpp if the Direct X version changes.
 LIBS += -ld3d9 -ld3dcompiler
 STATICLIBS = translator_common translator_hlsl preprocessor
 

tools/configure/configureapp.cpp

@@ -558,8 +558,10 @@ void Configure::parseCmdLine()
 
         else if (configCmdLine.at(i) == "-angle") {
             dictionary[ "ANGLE" ] = "yes";
+            dictionary[ "ANGLE_FROM" ] = "commandline";
         } else if (configCmdLine.at(i) == "-no-angle") {
             dictionary[ "ANGLE" ] = "no";
+            dictionary[ "ANGLE_FROM" ] = "commandline";
         }
 
         // Image formats --------------------------------------------
@@ -1878,10 +1880,59 @@ QString Configure::defaultTo(const QString &option)
     return "yes";
 }
 
+bool Configure::checkAngleAvailability(QString *errorMessage /* = 0 */) const
+{
+    // Check for Direct X SDK (include lib and direct shader compiler 'fxc').
+    // Up to Direct X SDK June 2010 and for MinGW, this is pointed to by the
+    // DXSDK_DIR variable. Starting with Windows Kit 8, it is included
+    // in the Windows SDK. Checking for the header is not sufficient since
+    // it is also  present in MinGW.
+    const QString directXSdk = Environment::detectDirectXSdk();
+    const Compiler compiler = Environment::compilerFromQMakeSpec(dictionary[QStringLiteral("QMAKESPEC")]);
+    if (compiler < CC_NET2012 && directXSdk.isEmpty()) {
+        if (errorMessage)
+            *errorMessage = QStringLiteral("There is no Direct X SDK installed or the environment variable \"DXSDK_DIR\" is not set.");
+        return false;
+    }
+    const QString compilerHeader = QStringLiteral("d3dcompiler.h");
+    if (!findFile(compilerHeader)) {
+        if (errorMessage)
+            *errorMessage = QString::fromLatin1("The header '%1' could not be found.").arg(compilerHeader);
+        return false;
+    }
+    if (dictionary["SSE2"] != "no") {
+        const QString intrinHeader = QStringLiteral("intrin.h"); // Not present on MinGW-32
+        if (!findFile(intrinHeader)) {
+            if (errorMessage)
+                *errorMessage = QString::fromLatin1("The header '%1' required for SSE2 could not be found.").arg(intrinHeader);
+            return false;
+        }
+    }
+
+    const QString directXLibrary = QStringLiteral("d3d9.lib");
+    if (!findFile(directXLibrary)) {
+        if (errorMessage)
+            *errorMessage = QString::fromLatin1("The library '%1' could not be found.").arg(directXLibrary);
+        return false;
+    }
+    const QString fxcBinary = QStringLiteral("fxc.exe");
+    QStringList additionalPaths;
+    if (!directXSdk.isEmpty())
+        additionalPaths.push_back(directXSdk + QStringLiteral("/Utilities/bin/x86"));
+    QString fxcPath = QStandardPaths::findExecutable(fxcBinary, additionalPaths);
+    if (fxcPath.isEmpty()) {
+        if (errorMessage)
+            *errorMessage = QString::fromLatin1("The shader compiler '%1' could not be found.").arg(fxcBinary);
+        return false;
+    }
+    return true;
+}
+
 /*!
     Checks the system for the availability of a feature.
     Returns true if the feature is available, else false.
 */
+
 bool Configure::checkAvailability(const QString &part)
 {
     bool available = false;
@@ -1898,8 +1949,9 @@ bool Configure::checkAvailability(const QString &part)
         available = findFile("unicode/utypes.h") && findFile("unicode/ucol.h") && findFile("unicode/ustring.h")
                         && (findFile("icuin.lib") || findFile("libicuin.lib")); // libicun.lib if compiled with mingw
 
-    else if (part == "ANGLE")
-        available = findFile("d3dcompiler.h");
+    else if (part == "ANGLE") {
+        available = checkAngleAvailability();
+    }
 
     else if (part == "LIBJPEG")
         available = findFile("jpeglib.h");
@@ -2027,8 +2079,12 @@ void Configure::autoDetection()
 
     // ANGLE detection
     if (dictionary["ANGLE"] == "auto") {
-        bool gles2 = (dictionary["OPENGL_ES_2"] == "yes");
-        dictionary["ANGLE"] = (gles2 && checkAvailability("ANGLE")) ? "yes" : "no";
+        if (dictionary["OPENGL_ES_2"] == "yes") {
+            dictionary["ANGLE"] = checkAngleAvailability() ? "yes" : "no";
+            dictionary["ANGLE_FROM"] = "detected";
+        } else {
+            dictionary["ANGLE"] = "no";
+        }
     }
 
     // Image format detection
@@ -2173,6 +2229,32 @@ bool Configure::verifyConfiguration()
         prompt = true;
     }
 
+    // -angle given on command line, but Direct X cannot be found.
+    if (dictionary["ANGLE"] == "yes") {
+        QString errorMessage;
+        if (!checkAngleAvailability(&errorMessage)) {
+            cout << "WARNING: ANGLE specified, but the DirectX SDK could not be detected:" << endl
+                 << "  " << qPrintable(errorMessage) << endl
+                 <<  "The build will most likely fail." << endl;
+            prompt = true;
+        }
+    } else if (dictionary["ANGLE"] == "no") {
+        if (dictionary["ANGLE_FROM"] == "detected") {
+            QString errorMessage;
+            checkAngleAvailability(&errorMessage);
+            cout << "WARNING: The DirectX SDK could not be detected:" << endl
+                 << "  " << qPrintable(errorMessage) << endl
+                 << "Disabling the ANGLE backend." << endl;
+            prompt = true;
+        }
+        if (dictionary["OPENGL_ES_2"] == "yes") {
+            cout << endl << "WARNING: Using OpenGL ES 2.0 without ANGLE." << endl
+                 << "Specify -opengl desktop to use Open GL." << endl
+                 <<  "The build will most likely fail." << endl;
+            prompt = true;
+        }
+    }
+
     if (prompt)
         promptKeyPress();
 

tools/configure/configureapp.h

@@ -110,6 +110,8 @@ public:
     QString qpaPlatformName() const;
 
 private:
+    bool checkAngleAvailability(QString *errorMessage = 0) const;
+
     // Our variable dictionaries
     QMap<QString,QString> dictionary;
     QStringList defaultBuildParts;