Windows: Improve EVR presenter.

Removed hard dependency to Angle; it's now required only when rendering
to a texture. If Angle is not used, the buffers are now mappable to
system memory.

This enables HW-accelerated video decoding in QML for non-ANGLE
builds. Note that the frame data have to do a round-trip through system
memory, which is not ideal but still faster than SW decoding.

Task-number: QTBUG-45593
Change-Id: Icc3503142df4e8dbb53b4e11f409b161fd2f9bde
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>

src/plugins/common/evr.pri

@@ -1,28 +1,20 @@
 INCLUDEPATH += $$PWD/evr
 
 qtHaveModule(widgets): QT += widgets
+QT += gui-private
+
+LIBS += -lmf -lmfplat -lmfuuid -ld3d9 -ldxva2 -lwinmm -levr
 
 HEADERS += \
     $$PWD/evr/evrvideowindowcontrol.h \
+    $$PWD/evr/evrcustompresenter.h \
+    $$PWD/evr/evrd3dpresentengine.h \
+    $$PWD/evr/evrhelpers.h \
     $$PWD/evr/evrdefs.h
 
 SOURCES += \
     $$PWD/evr/evrvideowindowcontrol.cpp \
+    $$PWD/evr/evrcustompresenter.cpp \
+    $$PWD/evr/evrd3dpresentengine.cpp \
+    $$PWD/evr/evrhelpers.cpp \
     $$PWD/evr/evrdefs.cpp
-
-contains(QT_CONFIG, angle)|contains(QT_CONFIG, dynamicgl) {
-    LIBS += -lmf -lmfplat -lmfuuid -ld3d9 -ldxva2 -lwinmm -levr
-    QT += gui-private
-
-    DEFINES += CUSTOM_EVR_PRESENTER
-
-    HEADERS += \
-        $$PWD/evr/evrcustompresenter.h \
-        $$PWD/evr/evrd3dpresentengine.h \
-        $$PWD/evr/evrhelpers.h
-
-    SOURCES += \
-        $$PWD/evr/evrcustompresenter.cpp \
-        $$PWD/evr/evrd3dpresentengine.cpp \
-        $$PWD/evr/evrhelpers.cpp
-}