Handle new pure virtual methods in QSGLayer

Added support for horizontal and vertical mirroring of a QSGLayer.

Change-Id: Ic3c94f219ea97ef97287c8e4cebf853cfa961a80
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@theqtcompany.com>

4 files changed, 34 insertions, 0 deletions

diff --git a/src/plugins/scenegraph/softwarecontext/context.cpp b/src/plugins/scenegraph/softwarecontext/context.cpp
index b3b97a7..6f5c997 100644
--- a/src/plugins/scenegraph/softwarecontext/context.cpp
+++ b/src/plugins/scenegraph/softwarecontext/context.cpp
@@ -121,6 +121,8 @@ void Renderer::nodeChanged(QSGNode *node, QSGNode::DirtyState state)
 
 PixmapRenderer::PixmapRenderer(QSGRenderContext *context)
     : QSGRenderer(context)
+    , m_mirrorHorizontal(false)
+    , m_mirrorVertical(false)
 {
 
 }
@@ -147,6 +149,12 @@ void PixmapRenderer::render(QPixmap *target)
     painter.setRenderHint(QPainter::Antialiasing);
     painter.setWindow(m_projectionRect);
 
+    if (m_mirrorHorizontal || m_mirrorVertical) {
+        QMatrix mirroringMatrix;
+        mirroringMatrix.scale(m_mirrorHorizontal ? -1 : 1, m_mirrorVertical ? -1 : 1);
+        painter.setMatrix(mirroringMatrix);
+    }
+
     RenderingVisitor(&painter).visitChildren(rootNode());
 }
 
diff --git a/src/plugins/scenegraph/softwarecontext/context.h b/src/plugins/scenegraph/softwarecontext/context.h
index 0d734df..b8cd5bb 100644
--- a/src/plugins/scenegraph/softwarecontext/context.h
+++ b/src/plugins/scenegraph/softwarecontext/context.h
@@ -68,6 +68,8 @@ public:
     void render(QPixmap *target);
 
     QRect m_projectionRect;
+    bool m_mirrorHorizontal;
+    bool m_mirrorVertical;
 };
 
 class RenderContext : public QSGRenderContext
diff --git a/src/plugins/scenegraph/softwarecontext/softwarelayer.cpp b/src/plugins/scenegraph/softwarecontext/softwarelayer.cpp
index 2ee1461..13531c5 100644
--- a/src/plugins/scenegraph/softwarecontext/softwarelayer.cpp
+++ b/src/plugins/scenegraph/softwarecontext/softwarelayer.cpp
@@ -26,6 +26,8 @@ SoftwareLayer::SoftwareLayer(QSGRenderContext *renderContext)
     , m_context(renderContext)
     , m_renderer(0)
     , m_device_pixel_ratio(1)
+    , m_mirrorHorizontal(false)
+    , m_mirrorVertical(false)
     , m_live(true)
     , m_grab(true)
     , m_recursive(false)
@@ -151,6 +153,22 @@ void SoftwareLayer::setDevicePixelRatio(qreal ratio)
     m_device_pixel_ratio = ratio;
 }
 
+void SoftwareLayer::setMirrorHorizontal(bool mirror)
+{
+    if (m_mirrorHorizontal == mirror)
+        return;
+    m_mirrorHorizontal = mirror;
+    markDirtyTexture();
+}
+
+void SoftwareLayer::setMirrorVertical(bool mirror)
+{
+    if (m_mirrorVertical == mirror)
+        return;
+    m_mirrorVertical = mirror;
+    markDirtyTexture();
+}
+
 void SoftwareLayer::markDirtyTexture()
 {
     m_dirtyTexture = true;
@@ -198,6 +216,8 @@ void SoftwareLayer::grab()
 
     m_renderer->setDeviceRect(m_size);
     m_renderer->setViewportRect(m_size);
+    m_renderer->m_mirrorHorizontal = m_mirrorHorizontal;
+    m_renderer->m_mirrorVertical = m_mirrorVertical;
     m_renderer->m_projectionRect = QRect(m_rect.x() * m_device_pixel_ratio,
                                          m_rect.y() * m_device_pixel_ratio,
                                          m_rect.width() * m_device_pixel_ratio,
diff --git a/src/plugins/scenegraph/softwarecontext/softwarelayer.h b/src/plugins/scenegraph/softwarecontext/softwarelayer.h
index 67d7953..c4375b1 100644
--- a/src/plugins/scenegraph/softwarecontext/softwarelayer.h
+++ b/src/plugins/scenegraph/softwarecontext/softwarelayer.h
@@ -60,6 +60,8 @@ public:
     virtual void setFormat(GLenum);
     virtual void setHasMipmaps(bool);
     virtual void setDevicePixelRatio(qreal ratio);
+    virtual void setMirrorHorizontal(bool mirror);
+    virtual void setMirrorVertical(bool mirror);
 
 public slots:
     virtual void markDirtyTexture();
@@ -75,6 +77,8 @@ private:
     QSize m_size;
     QPixmap m_pixmap;
     qreal m_device_pixel_ratio;
+    bool m_mirrorHorizontal;
+    bool m_mirrorVertical;
     bool m_live;
     bool m_grab;
     bool m_recursive;