#define DALI_INTERNAL_RENDER_ALGORITHMS_H
/*
- * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*/
// INTERNAL INCLUDES
+#include <dali/integration-api/core-enumerations.h>
#include <dali/internal/common/buffer-index.h>
+#include <dali/internal/render/common/render-list.h>
namespace Dali
{
+
namespace Internal
{
class Context;
namespace SceneGraph
{
class RenderInstruction;
-class Shader;
-class TextureCache;
+struct RenderItem;
}
namespace Render
{
/**
- * Process a render-instruction.
- * @param[in] instruction The render-instruction to process.
- * @param[in] context The GL context.
- * @param[in] textureCache The texture cache used to get textures.
- * @param[in] defaultShader The default shader.
- * @param[in] bufferIndex The current render buffer index (previous update buffer)
+ * @brief The responsibility of the RenderAlgorithms object is to action renders required by a RenderInstruction.
*/
-void ProcessRenderInstruction( const SceneGraph::RenderInstruction& instruction,
+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 );
+
+ 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 );
+
+ /**
+ * @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,
Context& context,
- SceneGraph::TextureCache& textureCache,
- SceneGraph::Shader& defaultShader,
- BufferIndex bufferIndex );
+ bool& usedStencilBuffer,
+ uint32_t& lastClippingDepth,
+ uint32_t& lastClippingId,
+ Integration::StencilBufferAvailable stencilBufferAvailable );
+
+ /**
+ * @brief Process a render-list.
+ * @param[in] renderList The render-list to process.
+ * @param[in] context The GL context.
+ * @param[in] buffer The current render buffer index (previous update buffer)
+ * @param[in] viewMatrix The view matrix from the appropriate camera.
+ * @param[in] projectionMatrix The projection matrix from the appropriate camera.
+ * @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
+ */
+ inline void ProcessRenderList( const Dali::Internal::SceneGraph::RenderList& renderList,
+ Context& context,
+ BufferIndex bufferIndex,
+ const Matrix& viewMatrix,
+ const Matrix& projectionMatrix,
+ Integration::DepthBufferAvailable depthBufferAvailable,
+ Integration::StencilBufferAvailable stencilBufferAvailable,
+ Vector<GLuint>& boundTextures );
+
+ // Prevent copying:
+ RenderAlgorithms( RenderAlgorithms& rhs );
+ RenderAlgorithms& operator=( const RenderAlgorithms& rhs );
+
+
+ // Member variables:
+
+ using ScissorStackType = std::vector<Dali::ClippingBox>; ///< The container type used to maintain the applied scissor hierarchy
+
+ ScissorStackType mScissorStack; ///< Contains the currently applied scissor hierarchy (so we can undo clips)
+ Dali::ClippingBox mViewportRectangle; ///< The viewport dimensions, used to translate AABBs to scissor coordinates
+ bool mHasLayerScissor:1; ///< Marks if the currently process render instruction has a layer-based clipping region
+};
} // namespace Render
projects / platform / core / uifw / dali-core.git / blobdiff