Merge v5.1.0 releasebaserock/morph

1 files changed, 31 insertions, 0 deletions

diff --git a/src/quick/scenegraph/qsgcontext.cpp b/src/quick/scenegraph/qsgcontext.cpp
index d3710c7bd5..61fb1bc5b9 100644
--- a/src/quick/scenegraph/qsgcontext.cpp
+++ b/src/quick/scenegraph/qsgcontext.cpp
@@ -47,13 +47,16 @@
 #include <QtQuick/private/qsgdefaultimagenode_p.h>
 #include <QtQuick/private/qsgdefaultglyphnode_p.h>
 #include <QtQuick/private/qsgdistancefieldglyphnode_p.h>
+#include <QtQuick/private/qsgdistancefieldglyphnode_p_p.h>
 #include <QtQuick/private/qsgshareddistancefieldglyphcache_p.h>
+#include <QtQuick/QSGFlatColorMaterial>
 
 #include <QtQuick/private/qsgtexture_p.h>
 #include <QtQuick/private/qquickpixmapcache_p.h>
 
 #include <QGuiApplication>
 #include <QOpenGLContext>
+#include <QQuickWindow>
 #include <QtGui/qopenglframebufferobject.h>
 
 #include <private/qqmlglobal_p.h>
@@ -262,9 +265,35 @@ void QSGContext::initialize(QOpenGLContext *context)
     Q_ASSERT(!d->gl);
     d->gl = context;
 
+    precompileMaterials();
+
     emit initialized();
 }
 
+#define QSG_PRECOMPILE_MATERIAL(name) { name m; prepareMaterial(&m); }
+
+/*
+ * Some glsl compilers take their time compiling materials, and
+ * the way the scene graph is being processed, these materials
+ * get compiled when they are first taken into use. This can
+ * easily lead to skipped frames. By precompiling the most
+ * common materials, we potentially add a few milliseconds to the
+ * start up, and reduce the chance of avoiding skipped frames
+ * later on.
+ */
+void QSGContext::precompileMaterials()
+{
+    if (qEnvironmentVariableIsEmpty("QSG_NO_MATERIAL_PRELOADING")) {
+        QSG_PRECOMPILE_MATERIAL(QSGVertexColorMaterial);
+        QSG_PRECOMPILE_MATERIAL(QSGFlatColorMaterial);
+        QSG_PRECOMPILE_MATERIAL(QSGOpaqueTextureMaterial);
+        QSG_PRECOMPILE_MATERIAL(QSGTextureMaterial);
+        QSG_PRECOMPILE_MATERIAL(SmoothTextureMaterial);
+        QSG_PRECOMPILE_MATERIAL(SmoothColorMaterial);
+        QSG_PRECOMPILE_MATERIAL(QSGDistanceFieldTextMaterial);
+    }
+}
+
 
 /*!
     Returns if the scene graph context is ready or not, meaning that it has a valid
@@ -398,6 +427,8 @@ QSurfaceFormat QSGContext::defaultSurfaceFormat() const
     QSurfaceFormat format;
     format.setDepthBufferSize(24);
     format.setStencilBufferSize(8);
+    if (QQuickWindow::hasDefaultAlphaBuffer())
+        format.setAlphaBufferSize(8);
     format.setSwapBehavior(QSurfaceFormat::DoubleBuffer);
     return format;
 }