1 files changed, 50 insertions, 9 deletions

diff --git a/src/datavisualization/utils/qutils.h b/src/datavisualization/utils/qutils.h
index d4acfc99..93226be9 100644
--- a/src/datavisualization/utils/qutils.h
+++ b/src/datavisualization/utils/qutils.h
@@ -20,29 +20,70 @@
 #define QUTILS_H
 
 #include <QtGui/QSurfaceFormat>
+#include <QtGui/QOpenGLContext>
+#include <QtGui/QOffscreenSurface>
+#include <QtCore/QCoreApplication>
 
 namespace QtDataVisualization {
 
 inline static QSurfaceFormat qDefaultSurfaceFormat(bool antialias = true)
 {
+    bool isES = false;
+
     QSurfaceFormat surfaceFormat;
 
+    // Common attributes
     surfaceFormat.setDepthBufferSize(24);
     surfaceFormat.setStencilBufferSize(8);
     surfaceFormat.setSwapBehavior(QSurfaceFormat::DoubleBuffer);
     surfaceFormat.setRenderableType(QSurfaceFormat::DefaultRenderableType);
+
+    QOpenGLContext *ctx = QOpenGLContext::currentContext();
+    QOffscreenSurface *dummySurface = 0;
+    if (!ctx) {
+        dummySurface = new QOffscreenSurface();
+        dummySurface->setFormat(surfaceFormat);
+        dummySurface->create();
+        ctx = new QOpenGLContext;
+        ctx->setFormat(surfaceFormat);
+        ctx->create();
+        ctx->makeCurrent(dummySurface);
+    }
+
 #if defined(QT_OPENGL_ES_2)
-    // Antialias not supported for ES
-    antialias = false;
-    surfaceFormat.setRedBufferSize(8);
-    surfaceFormat.setBlueBufferSize(8);
-    surfaceFormat.setGreenBufferSize(8);
+    isES = true;
+#elif (QT_VERSION < QT_VERSION_CHECK(5, 3, 0))
+    isES = false;
+#else
+    isES = ctx->isOpenGLES();
+#endif
+
+    if (dummySurface) {
+        ctx->doneCurrent();
+        delete ctx;
+        delete dummySurface;
+    }
+
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 4, 0))
+    // We support only ES2 emulation with software renderer for now
+    if (QCoreApplication::testAttribute(Qt::AA_UseSoftwareOpenGL)) {
+        qWarning("Only OpenGL ES2 emulation is available for software rendering.");
+        isES = true;
+    }
 #endif
 
-    if (antialias)
-        surfaceFormat.setSamples(8);
-    else
-        surfaceFormat.setSamples(0);
+    if (isES) {
+        // For ES2 only attributes
+        surfaceFormat.setRedBufferSize(8);
+        surfaceFormat.setBlueBufferSize(8);
+        surfaceFormat.setGreenBufferSize(8);
+    } else {
+        // For OpenGL only attributes
+        if (antialias)
+            surfaceFormat.setSamples(8);
+        else
+            surfaceFormat.setSamples(0);
+    }
 
     return surfaceFormat;
 }