Turn the SoftwareContext plugin into the Scenegraph Software Adaptation

The 2D renderer will now become a built-in adaptation of scenegraph that
should always be available to fallback to when there are no other
renders available.  So rather than be an external plugin, now it is a
built in adaptation.

Change-Id: Ifa02fd50f3085ad1e6f1a73c3ce1e1825b677cc7
Reviewed-by: Laszlo Agocs <[email protected]>

1 files changed, 183 insertions, 0 deletions

diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarecontext.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarecontext.cpp
new file mode 100644
index 0000000000..307ab206e2
--- /dev/null
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarecontext.cpp
@@ -0,0 +1,183 @@
+/****************************************************************************
+**
+** 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 "qsgsoftwarecontext_p.h"
+
+#include "qsgsoftwarerectanglenode_p.h"
+#include "qsgsoftwareimagenode_p.h"
+#include "qsgsoftwarepainternode_p.h"
+#include "qsgsoftwarepixmaptexture_p.h"
+#include "qsgsoftwareglyphnode_p.h"
+#include "qsgsoftwareninepatchnode_p.h"
+#include "qsgsoftwarelayer_p.h"
+#include "qsgsoftwarerenderer_p.h"
+
+#include <QtCore/QCoreApplication>
+#include <QtCore/QElapsedTimer>
+
+#include <QtGui/QWindow>
+
+#include <QtQuick/QSGFlatColorMaterial>
+#include <QtQuick/QSGVertexColorMaterial>
+#include <QtQuick/QSGOpaqueTextureMaterial>
+#include <QtQuick/QSGTextureMaterial>
+#include <private/qsgdefaultimagenode_p.h>
+#include <private/qsgdefaultrectanglenode_p.h>
+#include <private/qsgdistancefieldglyphnode_p_p.h>
+#include <private/qsgdefaultglyphnode_p.h>
+
+#ifndef QSG_NO_RENDERER_TIMING
+static bool qsg_render_timing = !qgetenv("QSG_RENDER_TIMING").isEmpty();
+#endif
+
+// Used for very high-level info about the renderering and gl context
+// Includes GL_VERSION, type of render loop, atlas size, etc.
+Q_LOGGING_CATEGORY(QSG_RASTER_LOG_INFO,                "qt.scenegraph.info")
+
+// Used to debug the renderloop logic. Primarily useful for platform integrators
+// and when investigating the render loop logic.
+Q_LOGGING_CATEGORY(QSG_RASTER_LOG_RENDERLOOP,          "qt.scenegraph.renderloop")
+
+// GLSL shader compilation
+Q_LOGGING_CATEGORY(QSG_RASTER_LOG_TIME_COMPILATION,    "qt.scenegraph.time.compilation")
+
+// polish, animations, sync, render and swap in the render loop
+Q_LOGGING_CATEGORY(QSG_RASTER_LOG_TIME_RENDERLOOP,     "qt.scenegraph.time.renderloop")
+
+// Texture uploads and swizzling
+Q_LOGGING_CATEGORY(QSG_RASTER_LOG_TIME_TEXTURE,        "qt.scenegraph.time.texture")
+
+// Glyph preparation (only for distance fields atm)
+Q_LOGGING_CATEGORY(QSG_RASTER_LOG_TIME_GLYPH,          "qt.scenegraph.time.glyph")
+
+// Timing inside the renderer base class
+Q_LOGGING_CATEGORY(QSG_RASTER_LOG_TIME_RENDERER,       "qt.scenegraph.time.renderer")
+
+QT_BEGIN_NAMESPACE
+
+QSGSoftwareRenderContext::QSGSoftwareRenderContext(QSGContext *ctx)
+    : QSGRenderContext(ctx)
+    , currentWindow(0)
+    , m_initialized(false)
+{
+}
+QSGSoftwareContext::QSGSoftwareContext(QObject *parent)
+    : QSGContext(parent)
+{
+    setDistanceFieldEnabled(false);
+}
+
+QSGRectangleNode *QSGSoftwareContext::createRectangleNode()
+{
+    return new QSGSoftwareRectangleNode();
+}
+
+QSGImageNode *QSGSoftwareContext::createImageNode()
+{
+    return new QSGSoftwareImageNode();
+}
+
+QSGPainterNode *QSGSoftwareContext::createPainterNode(QQuickPaintedItem *item)
+{
+    return new QSGSoftwarePainterNode(item);
+}
+
+QSGGlyphNode *QSGSoftwareContext::createGlyphNode(QSGRenderContext *rc, bool preferNativeGlyphNode)
+{
+    Q_UNUSED(rc);
+    Q_UNUSED(preferNativeGlyphNode);
+    return new QSGSoftwareGlyphNode();
+}
+
+QSGNinePatchNode *QSGSoftwareContext::createNinePatchNode()
+{
+    return new QSGSoftwareNinePatchNode();
+}
+
+QSGLayer *QSGSoftwareContext::createLayer(QSGRenderContext *renderContext)
+{
+    return new QSGSoftwareLayer(renderContext);
+}
+
+QSurfaceFormat QSGSoftwareContext::defaultSurfaceFormat() const
+{
+    QSurfaceFormat format = QSurfaceFormat::defaultFormat();
+    format.setRenderableType(QSurfaceFormat::DefaultRenderableType);
+    format.setMajorVersion(0);
+    format.setMinorVersion(0);
+    return format;
+}
+
+void QSGSoftwareRenderContext::initialize(QOpenGLContext *context)
+{
+    Q_UNUSED(context)
+    Q_UNREACHABLE();
+}
+
+void QSGSoftwareRenderContext::initializeIfNeeded()
+{
+    if (m_initialized)
+        return;
+    m_initialized = true;
+    emit initialized();
+}
+
+void QSGSoftwareRenderContext::invalidate()
+{
+    QSGRenderContext::invalidate();
+}
+
+QSGTexture *QSGSoftwareRenderContext::createTexture(const QImage &image, uint flags) const
+{
+    Q_UNUSED(flags)
+    return new QSGSoftwarePixmapTexture(image);
+}
+
+QSGRenderer *QSGSoftwareRenderContext::createRenderer()
+{
+    return new QSGSoftwareRenderer(this);
+}
+
+
+void QSGSoftwareRenderContext::renderNextFrame(QSGRenderer *renderer, GLuint fbo)
+{
+    QSGRenderContext::renderNextFrame(renderer, fbo);
+}
+
+QT_END_NAMESPACE