StencilMask backend renderstate for QStencilMask

Change-Id: Id6e92c5fe16cbdcd4307c8b1938e94ab593b4382
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

3 files changed, 34 insertions, 0 deletions

diff --git a/src/render/backend/renderstate.cpp b/src/render/backend/renderstate.cpp
index b3d4f4bf7..b89d807af 100644
--- a/src/render/backend/renderstate.cpp
+++ b/src/render/backend/renderstate.cpp
@@ -62,6 +62,7 @@
 #include <Qt3DRenderer/qclipplane.h>
 #include <Qt3DRenderer/qstencilop.h>
 #include <Qt3DRenderer/qstencilopseparate.h>
+#include <Qt3DRenderer/qstencilmask.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -317,6 +318,10 @@ RenderState *RenderState::getOrCreateBackendState(QRenderState *renderState)
         return StencilOp::getOrCreate(front->stencilFail(), front->depthFail(), front->stencilDepthPass(),
                                       back->stencilFail(), back->depthFail(), back->stencilDepthPass());
     }
+    case QRenderState::StencilMask: {
+        QStencilMask *stencilMask = static_cast<QStencilMask *>(renderState);
+        return StencilMask::getOrCreate(stencilMask->frontMask(), stencilMask->backMask());
+    }
 
     default:
         Q_UNREACHABLE();
diff --git a/src/render/backend/states/blendstate.cpp b/src/render/backend/states/blendstate.cpp
index 4b55dd971..0512ec685 100644
--- a/src/render/backend/states/blendstate.cpp
+++ b/src/render/backend/states/blendstate.cpp
@@ -313,6 +313,22 @@ StencilOp::StencilOp(GLenum fsfail, GLenum fdfail, GLenum fdspass, GLenum bsfail
 {
 }
 
+void StencilMask::apply(QGraphicsContext *gc) const
+{
+    gc->openGLContext()->functions()->glStencilMaskSeparate(GL_FRONT, m_1);
+    gc->openGLContext()->functions()->glStencilMaskSeparate(GL_BACK, m_2);
+}
+
+StencilMask *StencilMask::getOrCreate(uint frontMask, uint backMask)
+{
+    return getOrCreateImpl(StencilMask(frontMask, backMask));
+}
+
+StencilMask::StencilMask(uint frontMask, uint backMask)
+    : GenericState2<StencilMask, uint, uint>(frontMask, backMask)
+{
+}
+
 } // Render
 } // Qt3D
 
diff --git a/src/render/backend/states/blendstate_p.h b/src/render/backend/states/blendstate_p.h
index b7f527c5d..13dcb646b 100644
--- a/src/render/backend/states/blendstate_p.h
+++ b/src/render/backend/states/blendstate_p.h
@@ -262,6 +262,19 @@ private:
               GLenum bsfail, GLenum bdfail, GLenum bdspass);
 };
 
+class Q_AUTOTEST_EXPORT StencilMask : public GenericState2<StencilMask, uint, uint>
+{
+public:
+    void apply(QGraphicsContext *gc) const Q_DECL_FINAL;
+
+    StateMaskSet mask() const Q_DECL_FINAL
+    { return StencilWriteStateMask; }
+    static StencilMask *getOrCreate(uint frontMask, uint backMask);
+
+private:
+    StencilMask(uint frontMask, uint backMask);
+};
+
 } // Render
 } // Qt3D