+class RenderAlgorithms
+{
+ public:
+
+ /**
+ * Constructor.
+ */
+ RenderAlgorithms();
+
+ /**
+ * Process a render-instruction.
+ * @param[in] instruction The render-instruction to process.
+ * @param[in] context The GL context.
+ * @param[in] bufferIndex The current render buffer index (previous update buffer)
+ * @param[in] depthBufferAvailable Whether the depth buffer is available
+ * @param[in] stencilBufferAvailable Whether the stencil buffer is available
+ * @param[in] boundTextures The textures bound for rendering
+ */
+ void ProcessRenderInstruction( const SceneGraph::RenderInstruction& instruction,
+ Context& context,
+ BufferIndex bufferIndex,
+ Integration::DepthBufferAvailable depthBufferAvailable,
+ Integration::StencilBufferAvailable stencilBufferAvailable,
+ Vector<GLuint>& boundTextures,
+ int orientation);
+
+ private:
+
+ /**
+ * @brief Calculate a 2D AABB (axis aligned bounding box) in screen space.
+ * The RenderItems dimensions are translated and a Z value of 0 is assumed for this purpose.
+ * No projection is performed, but rotation on Z is supported.
+ * @param[in] item The RenderItem to generate an AABB for
+ * @return The generated AABB in screen space
+ */
+ inline Dali::ClippingBox CalculateScreenSpaceAABB( const Dali::Internal::SceneGraph::RenderItem& item );
+
+ /**
+ * @brief Perform any scissor clipping related operations based on the current RenderItem.
+ * This includes:
+ * - Determining if any action is to be taken (so the method can be exited early if not).
+ * - If the node is a clipping node, apply the nodes clip intersected with the current/parent scissor clip.
+ * - If we have gone up the scissor hierarchy, and need to un-apply a scissor clip.
+ * - Disable scissor clipping completely if it is not needed
+ * @param[in] item The current RenderItem (about to be rendered)
+ * @param[in] context The current Context
+ */
+ inline void SetupScissorClipping( const Dali::Internal::SceneGraph::RenderItem& item, Context& context, int orientation );
+
+ /**
+ * @brief Set up the clipping based on the specified clipping settings.
+ * @param[in] item The current RenderItem (about to be rendered)
+ * @param[in] context The context
+ * @param[in/out] usedStencilBuffer True if the stencil buffer has been used so far within this RenderList. Used by StencilMode::ON.
+ * @param[in/out] lastClippingDepth The stencil depth of the last renderer drawn. Used by the clipping feature.
+ * @param[in/out] lastClippingId The clipping ID of the last renderer drawn. Used by the clipping feature.
+ * @param[in] stencilBufferAvailable Whether the stencil buffer is available
+ */
+ inline void SetupClipping( const Dali::Internal::SceneGraph::RenderItem& item,