Add QQuickPathItem and its backend infra

The generic backend uses the triangulator from QtGui, but is in
fact OpenGL-only for now due to materials.

The NVPR backend uses GL_NV_path_rendering on NVIDIA hardware with
OpenGL 4.3+ or OpenGL ES 3.1+.

The software backend simply uses QPainter.

With the generic backend each PathItem is backed by a non-visual root node
and 0, 1 or 2 child geometry nodes, depending on the presence of visible
stroking and filling. The potentially expensive triangulation happens on
updatePolish(), on the gui thread. This is proven to provide much smoother
results when compared to doing the geometry generation on the render thread
in updatePaintNode(), in particular on power-limited embedded devices.

The NVPR backend uses a QSGRenderNode in DepthAware mode so that the batch
renderer can continue to rely on the depth buffer and use opaque batches.
Due to not relying on slow CPU-side triangulation, this backend uses 5-10
times less CPU, even when properties of the path or its elements are
animated.

The path itself is specified with the PathView's Path, PathLine, PathArc,
PathQuad, etc. types. This allows for consistency with PathView and the
2D Canvas and avoids a naming mess in the API. However, there won't be a
100% symmetry: backends like NVPR will not rely on QPainterPath but process
the path elements on their own (as QPainterPath is essentially useless with
these APIs), which can lead to differences in the supported path elements.

The supported common set is currently Move, Line, Quad, Cubic, Arc.

The patch introduces PathMove, which is essentially PathLine but maps to
moveTo instead of lineTo. More types may get added later (e.g. NVPR can do
a wide variety of optimized rounded rects, but this requires directly
specifying a GL_ROUNDED_RECTx_NV command, thus neededing a dedicated Path
type on our side too)

For filling with gradients only linear gradients are supported at the
moment.

In addition to the declarative API, a more lightweight, QObject-less
JS-callable API should be considered as well for the future.

Change-Id: I335ad64b425ee279505d60e3e57ac6841e1cbd24
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

6 files changed, 844 insertions, 3 deletions

diff --git a/src/quick/util/qquicknvprfunctions.cpp b/src/quick/util/qquicknvprfunctions.cpp
new file mode 100644
index 0000000000..40eb2bb932
--- /dev/null
+++ b/src/quick/util/qquicknvprfunctions.cpp
@@ -0,0 +1,284 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQuick module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquicknvprfunctions_p.h"
+
+#ifndef QT_NO_OPENGL
+
+#include <QOpenGLContext>
+#include <QOffscreenSurface>
+#include <QOpenGLExtraFunctions>
+#include "qquicknvprfunctions_p_p.h"
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QQuickNvprFunctions
+
+    \brief Function resolvers and other helpers for GL_NV_path_rendering
+    for both desktop (GL 4.3+) and mobile/embedded (GLES 3.1+) in a manner
+    that does not distract builds that do not have NVPR support either at
+    compile or run time.
+
+    \internal
+ */
+
+QQuickNvprFunctions::QQuickNvprFunctions()
+    : d(new QQuickNvprFunctionsPrivate(this))
+{
+}
+
+QQuickNvprFunctions::~QQuickNvprFunctions()
+{
+    delete d;
+}
+
+/*!
+   \return a recommended QSurfaceFormat suitable for GL_NV_path_rendering on top
+   of OpenGL 4.3 or OpenGL ES 3.1.
+ */
+QSurfaceFormat QQuickNvprFunctions::format()
+{
+    QSurfaceFormat fmt;
+    fmt.setDepthBufferSize(24);
+    fmt.setStencilBufferSize(8);
+    if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL) {
+        fmt.setVersion(4, 3);
+        fmt.setProfile(QSurfaceFormat::CompatibilityProfile);
+    } else if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGLES) {
+        fmt.setVersion(3, 1);
+    }
+    return fmt;
+}
+
+/*!
+  \return true if GL_NV_path_rendering is supported with the current OpenGL
+  context.
+
+  When there is no current context, a temporary dummy one will be created and
+  made current.
+ */
+bool QQuickNvprFunctions::isSupported()
+{
+    QOpenGLContext *ctx = QOpenGLContext::currentContext();
+    QScopedPointer<QOpenGLContext> tempContext;
+    QScopedPointer<QOffscreenSurface> tempSurface;
+    if (!ctx) {
+        tempContext.reset(new QOpenGLContext);
+        if (!tempContext->create())
+            return false;
+        ctx = tempContext.data();
+        tempSurface.reset(new QOffscreenSurface);
+        tempSurface->setFormat(ctx->format());
+        tempSurface->create();
+        if (!ctx->makeCurrent(tempSurface.data()))
+            return false;
+    }
+
+    if (!ctx->hasExtension(QByteArrayLiteral("GL_NV_path_rendering")))
+        return false;
+
+    // Do not check for DSA as the string may not be exposed on ES
+    // drivers, yet the functions we need are resolvable.
+#if 0
+    if (!ctx->hasExtension(QByteArrayLiteral("GL_EXT_direct_state_access"))) {
+        qWarning("QtQuickPath/NVPR: GL_EXT_direct_state_access not supported");
+        return false;
+    }
+#endif
+
+    return true;
+}
+
+/*!
+    Initializes using the current OpenGL context.
+
+    \return true when GL_NV_path_rendering is supported and initialization was
+    successful.
+ */
+bool QQuickNvprFunctions::create()
+{
+    return isSupported() && d->resolve();
+}
+
+/*!
+    Creates a program pipeline consisting of a separable fragment shader program.
+
+    This is essential for using NVPR with OpenGL ES 3.1+ since normal,
+    GLES2-style programs would not work without a vertex shader.
+
+    \note \a fragmentShaderSource should be a \c{version 310 es} shader since
+    this works both on desktop and embedded NVIDIA drivers, thus avoiding the
+    need to fight GLSL and GLSL ES differences.
+
+    The pipeline object is stored into \a pipeline, the fragment shader program
+    into \a program.
+
+    Use QOpenGLExtraFunctions to set uniforms, bind the pipeline, etc.
+
+    \return \c false on failure in which case the error log is printed on the
+    debug output. \c true on success.
+ */
+bool QQuickNvprFunctions::createFragmentOnlyPipeline(const char *fragmentShaderSource, GLuint *pipeline, GLuint *program)
+{
+    QOpenGLContext *ctx = QOpenGLContext::currentContext();
+    if (!ctx)
+        return false;
+
+    QOpenGLExtraFunctions *f = ctx->extraFunctions();
+    *program = f->glCreateShaderProgramv(GL_FRAGMENT_SHADER, 1, &fragmentShaderSource);
+    GLint status = 0;
+    f->glGetProgramiv(*program, GL_LINK_STATUS, &status);
+    if (!status) {
+        GLint len = 0;
+        f->glGetProgramiv(*program, GL_INFO_LOG_LENGTH, &len);
+        if (len) {
+            QByteArray s;
+            s.resize(len);
+            f->glGetProgramInfoLog(*program, s.count(), nullptr, s.data());
+            qWarning("Failed to create separable shader program:\n%s", s.constData());
+        }
+        return false;
+    }
+
+    f->glGenProgramPipelines(1, pipeline);
+    f->glUseProgramStages(*pipeline, GL_FRAGMENT_SHADER_BIT, *program);
+    f->glActiveShaderProgram(*pipeline, *program);
+
+    f->glValidateProgramPipeline(*pipeline);
+    status = 0;
+    f->glGetProgramPipelineiv(*pipeline, GL_VALIDATE_STATUS, &status);
+    if (!status) {
+        GLint len = 0;
+        f->glGetProgramPipelineiv(*pipeline, GL_INFO_LOG_LENGTH, &len);
+        if (len) {
+            QByteArray s;
+            s.resize(len);
+            f->glGetProgramPipelineInfoLog(*pipeline, s.count(), nullptr, s.data());
+            qWarning("Program pipeline validation failed:\n%s", s.constData());
+        }
+        return false;
+    }
+
+    return true;
+}
+
+#define PROC(type, name) reinterpret_cast<type>(ctx->getProcAddress(#name))
+
+bool QQuickNvprFunctionsPrivate::resolve()
+{
+    QOpenGLContext *ctx = QOpenGLContext::currentContext();
+
+    q->genPaths = PROC(PFNGLGENPATHSNVPROC, glGenPathsNV);
+    q->deletePaths = PROC(PFNGLDELETEPATHSNVPROC, glDeletePathsNV);
+    q->isPath = PROC(PFNGLISPATHNVPROC, glIsPathNV);
+    q->pathCommands = PROC(PFNGLPATHCOMMANDSNVPROC, glPathCommandsNV);
+    q->pathCoords = PROC(PFNGLPATHCOORDSNVPROC, glPathCoordsNV);
+    q->pathSubCommands = PROC(PFNGLPATHSUBCOMMANDSNVPROC, glPathSubCommandsNV);
+    q->pathSubCoords = PROC(PFNGLPATHSUBCOORDSNVPROC, glPathSubCoordsNV);
+    q->pathString = PROC(PFNGLPATHSTRINGNVPROC, glPathStringNV);
+    q->pathGlyphs = PROC(PFNGLPATHGLYPHSNVPROC, glPathGlyphsNV);
+    q->pathGlyphRange = PROC(PFNGLPATHGLYPHRANGENVPROC, glPathGlyphRangeNV);
+    q->weightPaths = PROC(PFNGLWEIGHTPATHSNVPROC, glWeightPathsNV);
+    q->copyPath = PROC(PFNGLCOPYPATHNVPROC, glCopyPathNV);
+    q->interpolatePaths = PROC(PFNGLINTERPOLATEPATHSNVPROC, glInterpolatePathsNV);
+    q->transformPath = PROC(PFNGLTRANSFORMPATHNVPROC, glTransformPathNV);
+    q->pathParameteriv = PROC(PFNGLPATHPARAMETERIVNVPROC, glPathParameterivNV);
+    q->pathParameteri = PROC(PFNGLPATHPARAMETERINVPROC, glPathParameteriNV);
+    q->pathParameterfv = PROC(PFNGLPATHPARAMETERFVNVPROC, glPathParameterfvNV);
+    q->pathParameterf = PROC(PFNGLPATHPARAMETERFNVPROC, glPathParameterfNV);
+    q->pathDashArray = PROC(PFNGLPATHDASHARRAYNVPROC, glPathDashArrayNV);
+    q->pathStencilFunc = PROC(PFNGLPATHSTENCILFUNCNVPROC, glPathStencilFuncNV);
+    q->pathStencilDepthOffset = PROC(PFNGLPATHSTENCILDEPTHOFFSETNVPROC, glPathStencilDepthOffsetNV);
+    q->stencilFillPath = PROC(PFNGLSTENCILFILLPATHNVPROC, glStencilFillPathNV);
+    q->stencilStrokePath = PROC(PFNGLSTENCILSTROKEPATHNVPROC, glStencilStrokePathNV);
+    q->stencilFillPathInstanced = PROC(PFNGLSTENCILFILLPATHINSTANCEDNVPROC, glStencilFillPathInstancedNV);
+    q->stencilStrokePathInstanced = PROC(PFNGLSTENCILSTROKEPATHINSTANCEDNVPROC, glStencilStrokePathInstancedNV);
+    q->pathCoverDepthFunc = PROC(PFNGLPATHCOVERDEPTHFUNCNVPROC,  glPathCoverDepthFuncNV);
+    q->pathColorGen = PROC(PFNGLPATHCOLORGENNVPROC, glPathColorGenNV);
+    q->pathTexGen = PROC(PFNGLPATHTEXGENNVPROC, glPathTexGenNV);
+    q->pathFogGen = PROC(PFNGLPATHFOGGENNVPROC, glPathFogGenNV);
+    q->coverFillPath = PROC(PFNGLCOVERFILLPATHNVPROC, glCoverFillPathNV);
+    q->coverStrokePath = PROC(PFNGLCOVERSTROKEPATHNVPROC, glCoverStrokePathNV);
+    q->coverFillPathInstanced = PROC(PFNGLCOVERFILLPATHINSTANCEDNVPROC, glCoverFillPathInstancedNV);
+    q->coverStrokePathInstanced = PROC(PFNGLCOVERSTROKEPATHINSTANCEDNVPROC, glCoverStrokePathInstancedNV);
+    q->getPathParameteriv = PROC(PFNGLGETPATHPARAMETERIVNVPROC, glGetPathParameterivNV);
+    q->getPathParameterfv = PROC(PFNGLGETPATHPARAMETERFVNVPROC, glGetPathParameterfvNV);
+    q->getPathCommands = PROC(PFNGLGETPATHCOMMANDSNVPROC, glGetPathCommandsNV);
+    q->getPathCoords = PROC(PFNGLGETPATHCOORDSNVPROC, glGetPathCoordsNV);
+    q->getPathDashArray = PROC(PFNGLGETPATHDASHARRAYNVPROC, glGetPathDashArrayNV);
+    q->getPathMetrics = PROC(PFNGLGETPATHMETRICSNVPROC, glGetPathMetricsNV);
+    q->getPathMetricRange = PROC(PFNGLGETPATHMETRICRANGENVPROC, glGetPathMetricRangeNV);
+    q->getPathSpacing = PROC(PFNGLGETPATHSPACINGNVPROC, glGetPathSpacingNV);
+    q->getPathColorgeniv = PROC(PFNGLGETPATHCOLORGENIVNVPROC, glGetPathColorGenivNV);
+    q->getPathColorgenfv = PROC(PFNGLGETPATHCOLORGENFVNVPROC, glGetPathColorGenfvNV);
+    q->getPathTexGeniv = PROC(PFNGLGETPATHTEXGENIVNVPROC, glGetPathTexGenivNV);
+    q->getPathTexGenfv = PROC(PFNGLGETPATHTEXGENFVNVPROC, glGetPathTexGenfvNV);
+    q->isPointInFillPath = PROC(PFNGLISPOINTINFILLPATHNVPROC, glIsPointInFillPathNV);
+    q->isPointInStrokePath = PROC(PFNGLISPOINTINSTROKEPATHNVPROC, glIsPointInStrokePathNV);
+    q->getPathLength = PROC(PFNGLGETPATHLENGTHNVPROC, glGetPathLengthNV);
+    q->getPointAlongPath = PROC(PFNGLPOINTALONGPATHNVPROC, glPointAlongPathNV);
+    q->matrixLoad3x2f = PROC(PFNGLMATRIXLOAD3X2FNVPROC, glMatrixLoad3x2fNV);
+    q->matrixLoad3x3f = PROC(PFNGLMATRIXLOAD3X3FNVPROC, glMatrixLoad3x3fNV);
+    q->matrixLoadTranspose3x3f = PROC(PFNGLMATRIXLOADTRANSPOSE3X3FNVPROC, glMatrixLoadTranspose3x3fNV);
+    q->matrixMult3x2f = PROC(PFNGLMATRIXMULT3X2FNVPROC, glMatrixMult3x2fNV);
+    q->matrixMult3x3f = PROC(PFNGLMATRIXMULT3X3FNVPROC, glMatrixMult3x3fNV);
+    q->matrixMultTranspose3x3f = PROC(PFNGLMATRIXMULTTRANSPOSE3X3FNVPROC, glMatrixMultTranspose3x3fNV);
+    q->stencilThenCoverFillPath = PROC(PFNGLSTENCILTHENCOVERFILLPATHNVPROC, glStencilThenCoverFillPathNV);
+    q->stencilThenCoverStrokePath = PROC(PFNGLSTENCILTHENCOVERSTROKEPATHNVPROC, glStencilThenCoverStrokePathNV);
+    q->stencilThenCoverFillPathInstanced = PROC(PFNGLSTENCILTHENCOVERFILLPATHINSTANCEDNVPROC, glStencilThenCoverFillPathInstancedNV);
+    q->stencilThenCoverStrokePathInstanced = PROC(PFNGLSTENCILTHENCOVERSTROKEPATHINSTANCEDNVPROC, glStencilThenCoverStrokePathInstancedNV);
+    q->pathGlyphIndexRange = PROC(PFNGLPATHGLYPHINDEXRANGENVPROC, glPathGlyphIndexRangeNV);
+    q->pathGlyphIndexArray = PROC(PFNGLPATHGLYPHINDEXARRAYNVPROC, glPathGlyphIndexArrayNV);
+    q->pathMemoryGlyphIndexArray = PROC(PFNGLPATHMEMORYGLYPHINDEXARRAYNVPROC, glPathMemoryGlyphIndexArrayNV);
+    q->programPathFragmentInputGen = PROC(PFNGLPROGRAMPATHFRAGMENTINPUTGENNVPROC, glProgramPathFragmentInputGenNV);
+    q->getProgramResourcefv = PROC(PFNGLGETPROGRAMRESOURCEFVNVPROC, glGetProgramResourcefvNV);
+
+    q->matrixLoadf = PROC(PFNGLMATRIXLOADFEXTPROC, glMatrixLoadfEXT);
+    q->matrixLoadIdentity = PROC(PFNGLMATRIXLOADIDENTITYEXTPROC, glMatrixLoadIdentityEXT);
+
+    return q->genPaths != nullptr // base path rendering ext
+        && q->programPathFragmentInputGen != nullptr // updated path rendering ext
+        && q->matrixLoadf != nullptr // direct state access ext
+        && q->matrixLoadIdentity != nullptr;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_OPENGL
diff --git a/src/quick/util/qquicknvprfunctions_p.h b/src/quick/util/qquicknvprfunctions_p.h
new file mode 100644
index 0000000000..7900388305
--- /dev/null
+++ b/src/quick/util/qquicknvprfunctions_p.h
@@ -0,0 +1,406 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQuick module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQUICKNVPRFUNCTIONS_P_H
+#define QQUICKNVPRFUNCTIONS_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of a number of Qt sources files.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <qopengl.h>
+#include <QtGui/qsurfaceformat.h>
+
+#ifndef QT_NO_OPENGL
+
+QT_BEGIN_NAMESPACE
+
+#ifndef GL_NV_path_rendering
+#define GL_PATH_FORMAT_SVG_NV             0x9070
+#define GL_PATH_FORMAT_PS_NV              0x9071
+#define GL_STANDARD_FONT_NAME_NV          0x9072
+#define GL_SYSTEM_FONT_NAME_NV            0x9073
+#define GL_FILE_NAME_NV                   0x9074
+#define GL_PATH_STROKE_WIDTH_NV           0x9075
+#define GL_PATH_END_CAPS_NV               0x9076
+#define GL_PATH_INITIAL_END_CAP_NV        0x9077
+#define GL_PATH_TERMINAL_END_CAP_NV       0x9078
+#define GL_PATH_JOIN_STYLE_NV             0x9079
+#define GL_PATH_MITER_LIMIT_NV            0x907A
+#define GL_PATH_DASH_CAPS_NV              0x907B
+#define GL_PATH_INITIAL_DASH_CAP_NV       0x907C
+#define GL_PATH_TERMINAL_DASH_CAP_NV      0x907D
+#define GL_PATH_DASH_OFFSET_NV            0x907E
+#define GL_PATH_CLIENT_LENGTH_NV          0x907F
+#define GL_PATH_FILL_MODE_NV              0x9080
+#define GL_PATH_FILL_MASK_NV              0x9081
+#define GL_PATH_FILL_COVER_MODE_NV        0x9082
+#define GL_PATH_STROKE_COVER_MODE_NV      0x9083
+#define GL_PATH_STROKE_MASK_NV            0x9084
+#define GL_COUNT_UP_NV                    0x9088
+#define GL_COUNT_DOWN_NV                  0x9089
+#define GL_PATH_OBJECT_BOUNDING_BOX_NV    0x908A
+#define GL_CONVEX_HULL_NV                 0x908B
+#define GL_BOUNDING_BOX_NV                0x908D
+#define GL_TRANSLATE_X_NV                 0x908E
+#define GL_TRANSLATE_Y_NV                 0x908F
+#define GL_TRANSLATE_2D_NV                0x9090
+#define GL_TRANSLATE_3D_NV                0x9091
+#define GL_AFFINE_2D_NV                   0x9092
+#define GL_AFFINE_3D_NV                   0x9094
+#define GL_TRANSPOSE_AFFINE_2D_NV         0x9096
+#define GL_TRANSPOSE_AFFINE_3D_NV         0x9098
+#define GL_UTF8_NV                        0x909A
+#define GL_UTF16_NV                       0x909B
+#define GL_BOUNDING_BOX_OF_BOUNDING_BOXES_NV 0x909C
+#define GL_PATH_COMMAND_COUNT_NV          0x909D
+#define GL_PATH_COORD_COUNT_NV            0x909E
+#define GL_PATH_DASH_ARRAY_COUNT_NV       0x909F
+#define GL_PATH_COMPUTED_LENGTH_NV        0x90A0
+#define GL_PATH_FILL_BOUNDING_BOX_NV      0x90A1
+#define GL_PATH_STROKE_BOUNDING_BOX_NV    0x90A2
+#define GL_SQUARE_NV                      0x90A3
+#define GL_ROUND_NV                       0x90A4
+#define GL_TRIANGULAR_NV                  0x90A5
+#define GL_BEVEL_NV                       0x90A6
+#define GL_MITER_REVERT_NV                0x90A7
+#define GL_MITER_TRUNCATE_NV              0x90A8
+#define GL_SKIP_MISSING_GLYPH_NV          0x90A9
+#define GL_USE_MISSING_GLYPH_NV           0x90AA
+#define GL_PATH_ERROR_POSITION_NV         0x90AB
+#define GL_PATH_FOG_GEN_MODE_NV           0x90AC
+#define GL_ACCUM_ADJACENT_PAIRS_NV        0x90AD
+#define GL_ADJACENT_PAIRS_NV              0x90AE
+#define GL_FIRST_TO_REST_NV               0x90AF
+#define GL_PATH_GEN_MODE_NV               0x90B0
+#define GL_PATH_GEN_COEFF_NV              0x90B1
+#define GL_PATH_GEN_COLOR_FORMAT_NV       0x90B2
+#define GL_PATH_GEN_COMPONENTS_NV         0x90B3
+#define GL_PATH_STENCIL_FUNC_NV           0x90B7
+#define GL_PATH_STENCIL_REF_NV            0x90B8
+#define GL_PATH_STENCIL_VALUE_MASK_NV     0x90B9
+#define GL_PATH_STENCIL_DEPTH_OFFSET_FACTOR_NV 0x90BD
+#define GL_PATH_STENCIL_DEPTH_OFFSET_UNITS_NV 0x90BE
+#define GL_PATH_COVER_DEPTH_FUNC_NV       0x90BF
+#define GL_PATH_DASH_OFFSET_RESET_NV      0x90B4
+#define GL_MOVE_TO_RESETS_NV              0x90B5
+#define GL_MOVE_TO_CONTINUES_NV           0x90B6
+#define GL_CLOSE_PATH_NV                  0x00
+#define GL_MOVE_TO_NV                     0x02
+#define GL_RELATIVE_MOVE_TO_NV            0x03
+#define GL_LINE_TO_NV                     0x04
+#define GL_RELATIVE_LINE_TO_NV            0x05
+#define GL_HORIZONTAL_LINE_TO_NV          0x06
+#define GL_RELATIVE_HORIZONTAL_LINE_TO_NV 0x07
+#define GL_VERTICAL_LINE_TO_NV            0x08
+#define GL_RELATIVE_VERTICAL_LINE_TO_NV   0x09
+#define GL_QUADRATIC_CURVE_TO_NV          0x0A
+#define GL_RELATIVE_QUADRATIC_CURVE_TO_NV 0x0B
+#define GL_CUBIC_CURVE_TO_NV              0x0C
+#define GL_RELATIVE_CUBIC_CURVE_TO_NV     0x0D
+#define GL_SMOOTH_QUADRATIC_CURVE_TO_NV   0x0E
+#define GL_RELATIVE_SMOOTH_QUADRATIC_CURVE_TO_NV 0x0F
+#define GL_SMOOTH_CUBIC_CURVE_TO_NV       0x10
+#define GL_RELATIVE_SMOOTH_CUBIC_CURVE_TO_NV 0x11
+#define GL_SMALL_CCW_ARC_TO_NV            0x12
+#define GL_RELATIVE_SMALL_CCW_ARC_TO_NV   0x13
+#define GL_SMALL_CW_ARC_TO_NV             0x14
+#define GL_RELATIVE_SMALL_CW_ARC_TO_NV    0x15
+#define GL_LARGE_CCW_ARC_TO_NV            0x16
+#define GL_RELATIVE_LARGE_CCW_ARC_TO_NV   0x17
+#define GL_LARGE_CW_ARC_TO_NV             0x18
+#define GL_RELATIVE_LARGE_CW_ARC_TO_NV    0x19
+#define GL_RESTART_PATH_NV                0xF0
+#define GL_DUP_FIRST_CUBIC_CURVE_TO_NV    0xF2
+#define GL_DUP_LAST_CUBIC_CURVE_TO_NV     0xF4
+#define GL_RECT_NV                        0xF6
+#define GL_CIRCULAR_CCW_ARC_TO_NV         0xF8
+#define GL_CIRCULAR_CW_ARC_TO_NV          0xFA
+#define GL_CIRCULAR_TANGENT_ARC_TO_NV     0xFC
+#define GL_ARC_TO_NV                      0xFE
+#define GL_RELATIVE_ARC_TO_NV             0xFF
+#define GL_BOLD_BIT_NV                    0x01
+#define GL_ITALIC_BIT_NV                  0x02
+#define GL_GLYPH_WIDTH_BIT_NV             0x01
+#define GL_GLYPH_HEIGHT_BIT_NV            0x02
+#define GL_GLYPH_HORIZONTAL_BEARING_X_BIT_NV 0x04
+#define GL_GLYPH_HORIZONTAL_BEARING_Y_BIT_NV 0x08
+#define GL_GLYPH_HORIZONTAL_BEARING_ADVANCE_BIT_NV 0x10
+#define GL_GLYPH_VERTICAL_BEARING_X_BIT_NV 0x20
+#define GL_GLYPH_VERTICAL_BEARING_Y_BIT_NV 0x40
+#define GL_GLYPH_VERTICAL_BEARING_ADVANCE_BIT_NV 0x80
+#define GL_GLYPH_HAS_KERNING_BIT_NV       0x100
+#define GL_FONT_X_MIN_BOUNDS_BIT_NV       0x00010000
+#define GL_FONT_Y_MIN_BOUNDS_BIT_NV       0x00020000
+#define GL_FONT_X_MAX_BOUNDS_BIT_NV       0x00040000
+#define GL_FONT_Y_MAX_BOUNDS_BIT_NV       0x00080000
+#define GL_FONT_UNITS_PER_EM_BIT_NV       0x00100000
+#define GL_FONT_ASCENDER_BIT_NV           0x00200000
+#define GL_FONT_DESCENDER_BIT_NV          0x00400000
+#define GL_FONT_HEIGHT_BIT_NV             0x00800000
+#define GL_FONT_MAX_ADVANCE_WIDTH_BIT_NV  0x01000000
+#define GL_FONT_MAX_ADVANCE_HEIGHT_BIT_NV 0x02000000
+#define GL_FONT_UNDERLINE_POSITION_BIT_NV 0x04000000
+#define GL_FONT_UNDERLINE_THICKNESS_BIT_NV 0x08000000
+#define GL_FONT_HAS_KERNING_BIT_NV        0x10000000
+#define GL_PRIMARY_COLOR_NV               0x852C
+#define GL_SECONDARY_COLOR_NV             0x852D
+#define GL_ROUNDED_RECT_NV                0xE8
+#define GL_RELATIVE_ROUNDED_RECT_NV       0xE9
+#define GL_ROUNDED_RECT2_NV               0xEA
+#define GL_RELATIVE_ROUNDED_RECT2_NV      0xEB
+#define GL_ROUNDED_RECT4_NV               0xEC
+#define GL_RELATIVE_ROUNDED_RECT4_NV      0xED
+#define GL_ROUNDED_RECT8_NV               0xEE
+#define GL_RELATIVE_ROUNDED_RECT8_NV      0xEF
+#define GL_RELATIVE_RECT_NV               0xF7
+#define GL_FONT_GLYPHS_AVAILABLE_NV       0x9368
+#define GL_FONT_TARGET_UNAVAILABLE_NV     0x9369
+#define GL_FONT_UNAVAILABLE_NV            0x936A
+#define GL_FONT_UNINTELLIGIBLE_NV         0x936B
+#define GL_CONIC_CURVE_TO_NV              0x1A
+#define GL_RELATIVE_CONIC_CURVE_TO_NV     0x1B
+#define GL_FONT_NUM_GLYPH_INDICES_BIT_NV  0x20000000
+#define GL_STANDARD_FONT_FORMAT_NV        0x936C
+#define GL_2_BYTES_NV                     0x1407
+#define GL_3_BYTES_NV                     0x1408
+#define GL_4_BYTES_NV                     0x1409
+#define GL_EYE_LINEAR_NV                  0x2400
+#define GL_OBJECT_LINEAR_NV               0x2401
+#define GL_CONSTANT_NV                    0x8576
+#define GL_PATH_PROJECTION_NV             0x1701
+#define GL_PATH_MODELVIEW_NV              0x1700
+#define GL_PATH_MODELVIEW_STACK_DEPTH_NV  0x0BA3
+#define GL_PATH_MODELVIEW_MATRIX_NV       0x0BA6
+#define GL_PATH_MAX_MODELVIEW_STACK_DEPTH_NV 0x0D36
+#define GL_PATH_TRANSPOSE_MODELVIEW_MATRIX_NV 0x84E3
+#define GL_PATH_PROJECTION_STACK_DEPTH_NV 0x0BA4
+#define GL_PATH_PROJECTION_MATRIX_NV      0x0BA7
+#define GL_PATH_MAX_PROJECTION_STACK_DEPTH_NV 0x0D38
+#define GL_PATH_TRANSPOSE_PROJECTION_MATRIX_NV 0x84E4
+#define GL_FRAGMENT_INPUT_NV              0x936D
+
+typedef GLuint (QOPENGLF_APIENTRYP PFNGLGENPATHSNVPROC) (GLsizei range);
+typedef void (QOPENGLF_APIENTRYP PFNGLDELETEPATHSNVPROC) (GLuint path, GLsizei range);
+typedef GLboolean (QOPENGLF_APIENTRYP PFNGLISPATHNVPROC) (GLuint path);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHCOMMANDSNVPROC) (GLuint path, GLsizei numCommands, const GLubyte *commands, GLsizei numCoords, GLenum coordType, const void *coords);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHCOORDSNVPROC) (GLuint path, GLsizei numCoords, GLenum coordType, const void *coords);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHSUBCOMMANDSNVPROC) (GLuint path, GLsizei commandStart, GLsizei commandsToDelete, GLsizei numCommands, const GLubyte *commands, GLsizei numCoords, GLenum coordType, const void *coords);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHSUBCOORDSNVPROC) (GLuint path, GLsizei coordStart, GLsizei numCoords, GLenum coordType, const void *coords);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHSTRINGNVPROC) (GLuint path, GLenum format, GLsizei length, const void *pathString);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHGLYPHSNVPROC) (GLuint firstPathName, GLenum fontTarget, const void *fontName, GLbitfield fontStyle, GLsizei numGlyphs, GLenum type, const void *charcodes, GLenum handleMissingGlyphs, GLuint pathParameterTemplate, GLfloat emScale);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHGLYPHRANGENVPROC) (GLuint firstPathName, GLenum fontTarget, const void *fontName, GLbitfield fontStyle, GLuint firstGlyph, GLsizei numGlyphs, GLenum handleMissingGlyphs, GLuint pathParameterTemplate, GLfloat emScale);
+typedef void (QOPENGLF_APIENTRYP PFNGLWEIGHTPATHSNVPROC) (GLuint resultPath, GLsizei numPaths, const GLuint *paths, const GLfloat *weights);
+typedef void (QOPENGLF_APIENTRYP PFNGLCOPYPATHNVPROC) (GLuint resultPath, GLuint srcPath);
+typedef void (QOPENGLF_APIENTRYP PFNGLINTERPOLATEPATHSNVPROC) (GLuint resultPath, GLuint pathA, GLuint pathB, GLfloat weight);
+typedef void (QOPENGLF_APIENTRYP PFNGLTRANSFORMPATHNVPROC) (GLuint resultPath, GLuint srcPath, GLenum transformType, const GLfloat *transformValues);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHPARAMETERIVNVPROC) (GLuint path, GLenum pname, const GLint *value);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHPARAMETERINVPROC) (GLuint path, GLenum pname, GLint value);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHPARAMETERFVNVPROC) (GLuint path, GLenum pname, const GLfloat *value);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHPARAMETERFNVPROC) (GLuint path, GLenum pname, GLfloat value);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHDASHARRAYNVPROC) (GLuint path, GLsizei dashCount, const GLfloat *dashArray);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHSTENCILFUNCNVPROC) (GLenum func, GLint ref, GLuint mask);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHSTENCILDEPTHOFFSETNVPROC) (GLfloat factor, GLfloat units);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILFILLPATHNVPROC) (GLuint path, GLenum fillMode, GLuint mask);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILSTROKEPATHNVPROC) (GLuint path, GLint reference, GLuint mask);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILFILLPATHINSTANCEDNVPROC) (GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLenum fillMode, GLuint mask, GLenum transformType, const GLfloat *transformValues);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILSTROKEPATHINSTANCEDNVPROC) (GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLint reference, GLuint mask, GLenum transformType, const GLfloat *transformValues);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHCOVERDEPTHFUNCNVPROC) (GLenum func);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHCOLORGENNVPROC) (GLenum color, GLenum genMode, GLenum colorFormat, const GLfloat *coeffs);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHTEXGENNVPROC) (GLenum texCoordSet, GLenum genMode, GLint components, const GLfloat *coeffs);
+typedef void (QOPENGLF_APIENTRYP PFNGLPATHFOGGENNVPROC) (GLenum genMode);
+typedef void (QOPENGLF_APIENTRYP PFNGLCOVERFILLPATHNVPROC) (GLuint path, GLenum coverMode);
+typedef void (QOPENGLF_APIENTRYP PFNGLCOVERSTROKEPATHNVPROC) (GLuint path, GLenum coverMode);
+typedef void (QOPENGLF_APIENTRYP PFNGLCOVERFILLPATHINSTANCEDNVPROC) (GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLenum coverMode, GLenum transformType, const GLfloat *transformValues);
+typedef void (QOPENGLF_APIENTRYP PFNGLCOVERSTROKEPATHINSTANCEDNVPROC) (GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLenum coverMode, GLenum transformType, const GLfloat *transformValues);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHPARAMETERIVNVPROC) (GLuint path, GLenum pname, GLint *value);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHPARAMETERFVNVPROC) (GLuint path, GLenum pname, GLfloat *value);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHCOMMANDSNVPROC) (GLuint path, GLubyte *commands);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHCOORDSNVPROC) (GLuint path, GLfloat *coords);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHDASHARRAYNVPROC) (GLuint path, GLfloat *dashArray);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHMETRICSNVPROC) (GLbitfield metricQueryMask, GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLsizei stride, GLfloat *metrics);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHMETRICRANGENVPROC) (GLbitfield metricQueryMask, GLuint firstPathName, GLsizei numPaths, GLsizei stride, GLfloat *metrics);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHSPACINGNVPROC) (GLenum pathListMode, GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLfloat advanceScale, GLfloat kerningScale, GLenum transformType, GLfloat *returnedSpacing);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHCOLORGENIVNVPROC) (GLenum color, GLenum pname, GLint *value);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHCOLORGENFVNVPROC) (GLenum color, GLenum pname, GLfloat *value);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHTEXGENIVNVPROC) (GLenum texCoordSet, GLenum pname, GLint *value);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPATHTEXGENFVNVPROC) (GLenum texCoordSet, GLenum pname, GLfloat *value);
+typedef GLboolean (QOPENGLF_APIENTRYP PFNGLISPOINTINFILLPATHNVPROC) (GLuint path, GLuint mask, GLfloat x, GLfloat y);
+typedef GLboolean (QOPENGLF_APIENTRYP PFNGLISPOINTINSTROKEPATHNVPROC) (GLuint path, GLfloat x, GLfloat y);
+typedef GLfloat (QOPENGLF_APIENTRYP PFNGLGETPATHLENGTHNVPROC) (GLuint path, GLsizei startSegment, GLsizei numSegments);
+typedef GLboolean (QOPENGLF_APIENTRYP PFNGLPOINTALONGPATHNVPROC) (GLuint path, GLsizei startSegment, GLsizei numSegments, GLfloat distance, GLfloat *x, GLfloat *y, GLfloat *tangentX, GLfloat *tangentY);
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXLOAD3X2FNVPROC) (GLenum matrixMode, const GLfloat *m);
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXLOAD3X3FNVPROC) (GLenum matrixMode, const GLfloat *m);
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXLOADTRANSPOSE3X3FNVPROC) (GLenum matrixMode, const GLfloat *m);
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXMULT3X2FNVPROC) (GLenum matrixMode, const GLfloat *m);
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXMULT3X3FNVPROC) (GLenum matrixMode, const GLfloat *m);
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXMULTTRANSPOSE3X3FNVPROC) (GLenum matrixMode, const GLfloat *m);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILTHENCOVERFILLPATHNVPROC) (GLuint path, GLenum fillMode, GLuint mask, GLenum coverMode);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILTHENCOVERSTROKEPATHNVPROC) (GLuint path, GLint reference, GLuint mask, GLenum coverMode);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILTHENCOVERFILLPATHINSTANCEDNVPROC) (GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLenum fillMode, GLuint mask, GLenum coverMode, GLenum transformType, const GLfloat *transformValues);
+typedef void (QOPENGLF_APIENTRYP PFNGLSTENCILTHENCOVERSTROKEPATHINSTANCEDNVPROC) (GLsizei numPaths, GLenum pathNameType, const void *paths, GLuint pathBase, GLint reference, GLuint mask, GLenum coverMode, GLenum transformType, const GLfloat *transformValues);
+typedef GLenum (QOPENGLF_APIENTRYP PFNGLPATHGLYPHINDEXRANGENVPROC) (GLenum fontTarget, const void *fontName, GLbitfield fontStyle, GLuint pathParameterTemplate, GLfloat emScale, GLuint baseAndCount[2]);
+typedef GLenum (QOPENGLF_APIENTRYP PFNGLPATHGLYPHINDEXARRAYNVPROC) (GLuint firstPathName, GLenum fontTarget, const void *fontName, GLbitfield fontStyle, GLuint firstGlyphIndex, GLsizei numGlyphs, GLuint pathParameterTemplate, GLfloat emScale);
+typedef GLenum (QOPENGLF_APIENTRYP PFNGLPATHMEMORYGLYPHINDEXARRAYNVPROC) (GLuint firstPathName, GLenum fontTarget, GLsizeiptr fontSize, const void *fontData, GLsizei faceIndex, GLuint firstGlyphIndex, GLsizei numGlyphs, GLuint pathParameterTemplate, GLfloat emScale);
+typedef void (QOPENGLF_APIENTRYP PFNGLPROGRAMPATHFRAGMENTINPUTGENNVPROC) (GLuint program, GLint location, GLenum genMode, GLint components, const GLfloat *coeffs);
+typedef void (QOPENGLF_APIENTRYP PFNGLGETPROGRAMRESOURCEFVNVPROC) (GLuint program, GLenum programInterface, GLuint index, GLsizei propCount, const GLenum *props, GLsizei bufSize, GLsizei *length, GLfloat *params);
+#endif
+
+#ifndef GL_FLAT
+#define GL_FLAT                           0x1D00
+#endif
+
+#ifndef GL_INVERT
+#define GL_INVERT                         0x150A
+#endif
+
+#ifndef GL_EXT_direct_state_access
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXLOADFEXTPROC) (GLenum mode, const GLfloat *m);
+typedef void (QOPENGLF_APIENTRYP PFNGLMATRIXLOADIDENTITYEXTPROC) (GLenum mode);
+#endif
+
+// When building on a system with GLES 2.0 or 3.0, we may still compile the NVPR
+// code path even though it's never used. Keep it compiling by defining the
+// necessary ES 3.1 separable program constants.
+#ifndef GL_FRAGMENT_SHADER_BIT
+#define GL_FRAGMENT_SHADER_BIT            0x00000002
+#endif
+#ifndef GL_UNIFORM
+#define GL_UNIFORM                        0x92E1
+#endif
+
+class QQuickNvprFunctionsPrivate;
+
+class QQuickNvprFunctions
+{
+public:
+    QQuickNvprFunctions();
+    ~QQuickNvprFunctions();
+
+    static QSurfaceFormat format();
+    static bool isSupported();
+
+    bool create();
+
+    bool createFragmentOnlyPipeline(const char *fragmentShaderSource, GLuint *pipeline, GLuint *program);
+
+    PFNGLGENPATHSNVPROC genPaths = nullptr;
+    PFNGLDELETEPATHSNVPROC deletePaths = nullptr;
+    PFNGLISPATHNVPROC isPath = nullptr;
+    PFNGLPATHCOMMANDSNVPROC pathCommands = nullptr;
+    PFNGLPATHCOORDSNVPROC pathCoords = nullptr;
+    PFNGLPATHSUBCOMMANDSNVPROC pathSubCommands = nullptr;
+    PFNGLPATHSUBCOORDSNVPROC pathSubCoords = nullptr;
+    PFNGLPATHSTRINGNVPROC pathString = nullptr;
+    PFNGLPATHGLYPHSNVPROC pathGlyphs = nullptr;
+    PFNGLPATHGLYPHRANGENVPROC pathGlyphRange = nullptr;
+    PFNGLWEIGHTPATHSNVPROC weightPaths = nullptr;
+    PFNGLCOPYPATHNVPROC copyPath = nullptr;
+    PFNGLINTERPOLATEPATHSNVPROC interpolatePaths = nullptr;
+    PFNGLTRANSFORMPATHNVPROC transformPath = nullptr;
+    PFNGLPATHPARAMETERIVNVPROC pathParameteriv = nullptr;
+    PFNGLPATHPARAMETERINVPROC pathParameteri = nullptr;
+    PFNGLPATHPARAMETERFVNVPROC pathParameterfv = nullptr;
+    PFNGLPATHPARAMETERFNVPROC pathParameterf = nullptr;
+    PFNGLPATHDASHARRAYNVPROC pathDashArray = nullptr;
+    PFNGLPATHSTENCILFUNCNVPROC pathStencilFunc = nullptr;
+    PFNGLPATHSTENCILDEPTHOFFSETNVPROC pathStencilDepthOffset = nullptr;
+    PFNGLSTENCILFILLPATHNVPROC stencilFillPath = nullptr;
+    PFNGLSTENCILSTROKEPATHNVPROC stencilStrokePath = nullptr;
+    PFNGLSTENCILFILLPATHINSTANCEDNVPROC stencilFillPathInstanced = nullptr;
+    PFNGLSTENCILSTROKEPATHINSTANCEDNVPROC stencilStrokePathInstanced = nullptr;
+    PFNGLPATHCOVERDEPTHFUNCNVPROC pathCoverDepthFunc = nullptr;
+    PFNGLPATHCOLORGENNVPROC pathColorGen = nullptr;
+    PFNGLPATHTEXGENNVPROC pathTexGen = nullptr;
+    PFNGLPATHFOGGENNVPROC pathFogGen = nullptr;
+    PFNGLCOVERFILLPATHNVPROC coverFillPath = nullptr;
+    PFNGLCOVERSTROKEPATHNVPROC coverStrokePath = nullptr;
+    PFNGLCOVERFILLPATHINSTANCEDNVPROC coverFillPathInstanced = nullptr;
+    PFNGLCOVERSTROKEPATHINSTANCEDNVPROC coverStrokePathInstanced = nullptr;
+    PFNGLGETPATHPARAMETERIVNVPROC getPathParameteriv = nullptr;
+    PFNGLGETPATHPARAMETERFVNVPROC getPathParameterfv = nullptr;
+    PFNGLGETPATHCOMMANDSNVPROC getPathCommands = nullptr;
+    PFNGLGETPATHCOORDSNVPROC getPathCoords = nullptr;
+    PFNGLGETPATHDASHARRAYNVPROC getPathDashArray = nullptr;
+    PFNGLGETPATHMETRICSNVPROC getPathMetrics = nullptr;
+    PFNGLGETPATHMETRICRANGENVPROC getPathMetricRange = nullptr;
+    PFNGLGETPATHSPACINGNVPROC getPathSpacing = nullptr;
+    PFNGLGETPATHCOLORGENIVNVPROC getPathColorgeniv = nullptr;
+    PFNGLGETPATHCOLORGENFVNVPROC getPathColorgenfv = nullptr;
+    PFNGLGETPATHTEXGENIVNVPROC getPathTexGeniv = nullptr;
+    PFNGLGETPATHTEXGENFVNVPROC getPathTexGenfv = nullptr;
+    PFNGLISPOINTINFILLPATHNVPROC isPointInFillPath = nullptr;
+    PFNGLISPOINTINSTROKEPATHNVPROC isPointInStrokePath = nullptr;
+    PFNGLGETPATHLENGTHNVPROC getPathLength = nullptr;
+    PFNGLPOINTALONGPATHNVPROC getPointAlongPath = nullptr;
+    PFNGLMATRIXLOAD3X2FNVPROC matrixLoad3x2f = nullptr;
+    PFNGLMATRIXLOAD3X3FNVPROC matrixLoad3x3f = nullptr;
+    PFNGLMATRIXLOADTRANSPOSE3X3FNVPROC matrixLoadTranspose3x3f = nullptr;
+    PFNGLMATRIXMULT3X2FNVPROC matrixMult3x2f = nullptr;
+    PFNGLMATRIXMULT3X3FNVPROC matrixMult3x3f = nullptr;
+    PFNGLMATRIXMULTTRANSPOSE3X3FNVPROC matrixMultTranspose3x3f = nullptr;
+    PFNGLSTENCILTHENCOVERFILLPATHNVPROC stencilThenCoverFillPath = nullptr;
+    PFNGLSTENCILTHENCOVERSTROKEPATHNVPROC stencilThenCoverStrokePath = nullptr;
+    PFNGLSTENCILTHENCOVERFILLPATHINSTANCEDNVPROC stencilThenCoverFillPathInstanced = nullptr;
+    PFNGLSTENCILTHENCOVERSTROKEPATHINSTANCEDNVPROC stencilThenCoverStrokePathInstanced = nullptr;
+    PFNGLPATHGLYPHINDEXRANGENVPROC pathGlyphIndexRange = nullptr;
+    PFNGLPATHGLYPHINDEXARRAYNVPROC pathGlyphIndexArray = nullptr;
+    PFNGLPATHMEMORYGLYPHINDEXARRAYNVPROC pathMemoryGlyphIndexArray = nullptr;
+    PFNGLPROGRAMPATHFRAGMENTINPUTGENNVPROC programPathFragmentInputGen = nullptr;
+    PFNGLGETPROGRAMRESOURCEFVNVPROC getProgramResourcefv = nullptr;
+
+    PFNGLMATRIXLOADFEXTPROC matrixLoadf = nullptr;
+    PFNGLMATRIXLOADIDENTITYEXTPROC matrixLoadIdentity = nullptr;
+
+private:
+    QQuickNvprFunctionsPrivate *d;
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_OPENGL
+
+#endif // QQUICKNVPRFUNCTIONS_P_H
diff --git a/src/quick/util/qquicknvprfunctions_p_p.h b/src/quick/util/qquicknvprfunctions_p_p.h
new file mode 100644
index 0000000000..6df20566af
--- /dev/null
+++ b/src/quick/util/qquicknvprfunctions_p_p.h
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQuick module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQUICKNVPRFUNCTIONS_P_P_H
+#define QQUICKNVPRFUNCTIONS_P_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of a number of Qt sources files.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qquicknvprfunctions_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QQuickNvprFunctionsPrivate
+{
+public:
+    QQuickNvprFunctionsPrivate(QQuickNvprFunctions *q_ptr) : q(q_ptr) { }
+
+    bool resolve();
+
+    QQuickNvprFunctions *q;
+};
+
+QT_END_NAMESPACE
+
+#endif // QQUICKNVPRFUNCTIONS_P_P_H
diff --git a/src/quick/util/qquickpath.cpp b/src/quick/util/qquickpath.cpp
index 25a4433a9b..a6fa21d696 100644
--- a/src/quick/util/qquickpath.cpp
+++ b/src/quick/util/qquickpath.cpp
@@ -68,7 +68,7 @@ QT_BEGIN_NAMESPACE
     \instantiates QQuickPath
     \inqmlmodule QtQuick
     \ingroup qtquick-animation-paths
-    \brief Defines a path for use by \l PathView
+    \brief Defines a path for use by \l PathView and \l PathItem
 
     A Path is composed of one or more path segments - PathLine, PathQuad,
     PathCubic, PathArc, PathCurve, PathSvg.
@@ -79,7 +79,7 @@ QT_BEGIN_NAMESPACE
     PathAttribute allows named attributes with values to be defined
     along the path.
 
-    \sa PathView, PathAttribute, PathPercent, PathLine, PathQuad, PathCubic, PathArc, PathCurve, PathSvg
+    \sa PathView, PathItem, PathAttribute, PathPercent, PathLine, PathMove, PathQuad, PathCubic, PathArc, PathCurve, PathSvg
 */
 QQuickPath::QQuickPath(QObject *parent)
  : QObject(*(new QQuickPathPrivate), parent)
@@ -1017,7 +1017,7 @@ void QQuickPathAttribute::setValue(qreal value)
     }
     \endqml
 
-    \sa Path, PathQuad, PathCubic, PathArc, PathCurve, PathSvg
+    \sa Path, PathQuad, PathCubic, PathArc, PathCurve, PathSvg, PathMove
 */
 
 /*!
@@ -1060,6 +1060,66 @@ void QQuickPathLine::addToPath(QPainterPath &path, const QQuickPathData &data)
 /****************************************************************************/
 
 /*!
+    \qmltype PathMove
+    \instantiates QQuickPathMove
+    \inqmlmodule QtQuick
+    \ingroup qtquick-animation-paths
+    \brief Moves the Path's position
+
+    While not relevant with PathView, for Path elements used with PathItem it
+    is important to distinguish between the operations of drawing a straight
+    line and moving the path position without drawing anything.
+
+    \note PathMove should not be used in a Path associated with a PathView. Use
+    PathLine instead.
+
+    The example below creates a path consisting of two horizontal lines with
+    some empty space between them. All three segments have a width of 100:
+
+    \qml
+    Path {
+        startX: 0; startY: 100
+        PathLine { relativeX: 100; y: 100 }
+        PathMove { relativeX: 100; y: 100 }
+        PathLine { relativeX: 100; y: 100 }
+    }
+    \endqml
+
+    \sa Path, PathQuad, PathCubic, PathArc, PathCurve, PathSvg, PathLine
+*/
+
+/*!
+    \qmlproperty real QtQuick::PathMove::x
+    \qmlproperty real QtQuick::PathMove::y
+
+    Defines the position to move to.
+
+    \sa relativeX, relativeY
+*/
+
+/*!
+    \qmlproperty real QtQuick::PathMove::relativeX
+    \qmlproperty real QtQuick::PathMove::relativeY
+
+    Defines the position to move to relative to its start.
+
+    If both a relative and absolute end position are specified for a single axis, the relative
+    position will be used.
+
+    Relative and absolute positions can be mixed, for example it is valid to set a relative x
+    and an absolute y.
+
+    \sa x, y
+*/
+
+void QQuickPathMove::addToPath(QPainterPath &path, const QQuickPathData &data)
+{
+    path.moveTo(positionForCurve(data, path.currentPosition()));
+}
+
+/****************************************************************************/
+
+/*!
     \qmltype PathQuad
     \instantiates QQuickPathQuad
     \inqmlmodule QtQuick
@@ -1655,6 +1715,7 @@ void QQuickPathArc::setRadiusX(qreal radius)
 
     _radiusX = radius;
     emit radiusXChanged();
+    emit changed();
 }
 
 qreal QQuickPathArc::radiusY() const
@@ -1669,6 +1730,7 @@ void QQuickPathArc::setRadiusY(qreal radius)
 
     _radiusY = radius;
     emit radiusYChanged();
+    emit changed();
 }
 
 /*!
@@ -1702,6 +1764,7 @@ void QQuickPathArc::setUseLargeArc(bool largeArc)
 
     _useLargeArc = largeArc;
     emit useLargeArcChanged();
+    emit changed();
 }
 
 /*!
@@ -1733,6 +1796,7 @@ void QQuickPathArc::setDirection(ArcDirection direction)
 
     _direction = direction;
     emit directionChanged();
+    emit changed();
 }
 
 void QQuickPathArc::addToPath(QPainterPath &path, const QQuickPathData &data)
diff --git a/src/quick/util/qquickpath_p.h b/src/quick/util/qquickpath_p.h
index 06ad389b49..283283f377 100644
--- a/src/quick/util/qquickpath_p.h
+++ b/src/quick/util/qquickpath_p.h
@@ -159,6 +159,15 @@ public:
     void addToPath(QPainterPath &path, const QQuickPathData &) override;
 };
 
+class Q_QUICK_PRIVATE_EXPORT QQuickPathMove : public QQuickCurve
+{
+    Q_OBJECT
+public:
+    QQuickPathMove(QObject *parent=0) : QQuickCurve(parent) {}
+
+    void addToPath(QPainterPath &path, const QQuickPathData &) override;
+};
+
 class Q_QUICK_PRIVATE_EXPORT QQuickPathQuad : public QQuickCurve
 {
     Q_OBJECT
@@ -459,6 +468,7 @@ QML_DECLARE_TYPE(QQuickPathElement)
 QML_DECLARE_TYPE(QQuickPathAttribute)
 QML_DECLARE_TYPE(QQuickCurve)
 QML_DECLARE_TYPE(QQuickPathLine)
+QML_DECLARE_TYPE(QQuickPathMove)
 QML_DECLARE_TYPE(QQuickPathQuad)
 QML_DECLARE_TYPE(QQuickPathCubic)
 QML_DECLARE_TYPE(QQuickPathCatmullRomCurve)
diff --git a/src/quick/util/util.pri b/src/quick/util/util.pri
index 1ef1018a31..22f23f7598 100644
--- a/src/quick/util/util.pri
+++ b/src/quick/util/util.pri
@@ -74,4 +74,11 @@ qtConfig(quick-path) {
         $$PWD/qquickpath_p.h \
         $$PWD/qquickpath_p_p.h \
         $$PWD/qquickpathinterpolator_p.h
+    qtConfig(opengl) {
+        SOURCES += \
+            $$PWD/qquicknvprfunctions.cpp
+        HEADERS += \
+            $$PWD/qquicknvprfunctions_p.h \
+            $$PWD/qquicknvprfunctions_p_p.h
+    }
 }