(Partial Update) Remove unnecessary data

[platform/core/uifw/dali-core.git] / dali / internal / render / common / render-item.h

diff --git a/dali/internal/render/common/render-item.h b/dali/internal/render/common/render-item.h
index 156272c..2fe74bd 100644 (file)
--- a/dali/internal/render/common/render-item.h
+++ b/dali/internal/render/common/render-item.h
@@ -2,7 +2,7 @@
 #define DALI_INTERNAL_SCENE_GRAPH_RENDER_ITEM_H
 
 /*
- * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ * Copyright (c) 2022 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.
@@ -19,26 +19,22 @@
  */
 
 // INTERNAL INCLUDES
-#include <dali/public-api/common/vector-wrapper.h>
+#include <dali/internal/update/nodes/node.h>
 #include <dali/public-api/actors/layer.h>
+#include <dali/public-api/common/vector-wrapper.h>
 #include <dali/public-api/math/matrix.h>
-#include <dali/internal/update/nodes/node.h>
 
 namespace Dali
 {
-
 namespace Internal
 {
-
 namespace Render
 {
 class Renderer;
-class RenderGeometry;
 }
 
 namespace SceneGraph
 {
-
 /**
  * A RenderItem contains all the data needed for rendering
  */
@@ -56,36 +52,62 @@ struct RenderItem
   ~RenderItem();
 
   /**
+   * Produce a 2D AABB in transformed space
+   * See below for caveats.
+   *
+   * @param[in]    transformMatrix   The matrix for converting to a different space
+   * @param[in]    position          The center position of the render item
+   * @param[in]    size              The size of the render item
+   */
+  static ClippingBox CalculateTransformSpaceAABB(const Matrix& transformMatrix, const Vector3& position, const Vector3& size);
+
+  /**
+   * @brief This method is an optimized calculation of a viewport-space AABB (Axis-Aligned-Bounding-Box).
+   *
+   * We use the model-view-matrix, but we do not use projection. Therefore we assume Z = 0.
+   * As the box is Axis-Aligned (in viewport space) rotations on Z axis are correctly delt with by expanding the box as necessary.
+   * Rotations on X & Y axis will resize the AABB, but it will not handle the projection error due to the new coordinates having non-zero Z values.
+   *
+   * Note: We pass in the viewport dimensions rather than allow the caller to modify the raw AABB in order to optimally generate the final result.
+   *
+   * Note: ASSUMES THAT THE VIEWPORT COVERS THE SCREEN AND THAT THE CANVAS SIZE AND VIEWPORT SIZE ARE THE SAME!!!!!  (Not the case for magnifier)
+   *
+   * @param[in]    modelViewMatrix   The model view matrix
+   * @param[in]    position          The center position of the render item
+   * @param[in]    size              The size of the render item
+   * @param[in]    viewportWidth     The width of the viewport to calculate for
+   * @param[in]    viewportHeight    The height of the viewport to calculate for
+   * @return                         The AABB coordinates in viewport-space (x, y, width, height)
+   */
+  static ClippingBox CalculateViewportSpaceAABB(const Matrix& modelViewMatrix, const Vector3& position, const Vector3& size, const int viewportWidth, const int viewportHeight);
+
+  /**
    * Overriden delete operator.
    * Deletes the RenderItem from its global memory pool
    * @param[in] A pointer to the RenderItem to delete.
    */
-  void operator delete( void* ptr );
+  void operator delete(void* ptr);
 
   Matrix            mModelMatrix;
   Matrix            mModelViewMatrix;
   Vector3           mSize;
+  Vector4           mUpdateArea; ///< Update area hint is provided for damaged area calculation. (x, y, width, height)
   Render::Renderer* mRenderer;
   Node*             mNode;
-  const void*       mTextureSet;        //< Used only for sorting
-
-  mutable Render::Geometry* mBatchRenderGeometry;
-
+  const void*       mTextureSet; ///< Used for sorting only
   int               mDepthIndex;
-  bool              mIsOpaque:1;
-  bool              mBatched:1;
+  bool              mIsOpaque : 1;
+  bool              mIsUpdated : 1;
 
 private:
-
   /**
    * Private constructor. See RenderItem::New
    */
   RenderItem();
 
   // RenderItems should not be copied as they are heavy
-  RenderItem( const RenderItem& item );
-  RenderItem& operator = ( const RenderItem& item );
-
+  RenderItem(const RenderItem& item);
+  RenderItem& operator=(const RenderItem& item);
 };
 
 } // namespace SceneGraph