-//
-// Copyright (c) 2014 Samsung Electronics Co., Ltd.
-//
-// Licensed under the Flora License, Version 1.0 (the License);
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://floralicense.org/license/
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an AS IS BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
+/*
+ * Copyright (c) 2018 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.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
// CLASS HEADER
#include <dali/internal/render/common/render-item.h>
// INTERNAL INCLUDES
-#include <dali/internal/render/renderers/scene-graph-renderer.h>
+#include <dali/internal/common/memory-pool-object-allocator.h>
+#include <dali/internal/render/renderers/render-renderer.h>
+#include <dali/internal/common/math.h>
+namespace
+{
+//Memory pool used to allocate new RenderItems. Memory used by this pool will be released when shutting down DALi
+Dali::Internal::MemoryPoolObjectAllocator<Dali::Internal::SceneGraph::RenderItem> gRenderItemPool;
+}
namespace Dali
{
namespace SceneGraph
{
-RenderItem::RenderItem()
-: mRenderer( NULL ),
- mModelViewMatrix( false )
+RenderItem* RenderItem::New()
{
+ return new ( gRenderItemPool.AllocateRaw() ) RenderItem();
}
-RenderItem::~RenderItem()
+RenderItem::RenderItem()
+: mModelMatrix( false ),
+ mModelViewMatrix( false ),
+ mSize(),
+ mUpdateSizeHint(),
+ mRenderer( NULL ),
+ mNode( NULL ),
+ mTextureSet( NULL ),
+ mDepthIndex( 0 ),
+ mIsOpaque( true ),
+ mPartialUpdateEnabled( false )
{
}
-void RenderItem::Reset()
+RenderItem::~RenderItem()
{
- mRenderer = NULL;
}
-void RenderItem::SetRenderer( Renderer* renderer )
-{
- mRenderer = renderer;
-}
-const Renderer* RenderItem::GetRenderer() const
+ClippingBox RenderItem::CalculateViewportSpaceAABB( const int viewportWidth, const int viewportHeight, const bool useUpdateSizeHint ) const
{
- return mRenderer;
-}
+ // Calculate extent vector of the AABB:
+ float halfActorX;
+ float halfActorY;
+ if( useUpdateSizeHint )
+ {
+ halfActorX = mUpdateSizeHint.x * 0.5f;
+ halfActorY = mUpdateSizeHint.y * 0.5f;
+ }
+ else
+ {
+ halfActorX = mSize.x * 0.5f;
+ halfActorY = mSize.y * 0.5f;
+ }
-Matrix& RenderItem::GetModelViewMatrix()
-{
- return mModelViewMatrix;
+
+ // To transform the actor bounds to screen-space, We do a fast, 2D version of a matrix multiply optimized for 2D quads.
+ // This reduces float multiplications from 64 (16 * 4) to 12 (4 * 3).
+ // We create an array of 4 corners and directly initialize the first 3 with the matrix multiplication result of the respective corner.
+ // This causes the construction of the vector arrays contents in-place for optimization.
+ // We place the coords into the array in clockwise order, so we know opposite corners are always i + 2 from corner i.
+ // We skip the 4th corner here as we can calculate that from the other 3, bypassing matrix multiplication.
+ // Note: The below transform methods use a fast (2D) matrix multiply (only 4 multiplications are done).
+ Vector2 corners[4]{ Transform2D( mModelViewMatrix, -halfActorX, -halfActorY ),
+ Transform2D( mModelViewMatrix, halfActorX, -halfActorY ),
+ Transform2D( mModelViewMatrix, halfActorX, halfActorY ) };
+
+ // As we are dealing with a rectangle, we can do a fast calculation to get the 4th corner from knowing the other 3 (even if rotated).
+ corners[3] = Vector2( corners[0] + ( corners[2] - corners[1] ) );
+
+ // Calculate the AABB:
+ // We use knowledge that opposite corners will be the max/min of each other. Doing this reduces the normal 12 branching comparisons to 3.
+ // The standard equivalent min/max code of the below would be:
+ // Vector2 AABBmax( std::max( corners[0].x, std::max( corners[1].x, std::max( corners[3].x, corners[2].x ) ) ),
+ // std::max( corners[0].y, std::max( corners[1].y, std::max( corners[3].y, corners[2].y ) ) ) );
+ // Vector2 AABBmin( std::min( corners[0].x, std::min( corners[1].x, std::min( corners[3].x, corners[2].x ) ) ),
+ // std::min( corners[0].y, std::min( corners[1].y, std::min( corners[3].y, corners[2].y ) ) ) );
+ unsigned int smallestX = 0u;
+ // Loop 3 times to find the index of the smallest X value.
+ // Note: We deliberately do NOT unroll the code here as this hampers the compilers output.
+ for( unsigned int i = 1u; i < 4u; ++i )
+ {
+ if( corners[i].x < corners[smallestX].x )
+ {
+ smallestX = i;
+ }
+ }
+
+ // As we are dealing with a rectangle, we can assume opposite corners are the largest.
+ // So without doing min/max branching, we can fetch the min/max values of all the remaining X/Y coords from this one index.
+ Vector4 aabb( corners[smallestX].x, corners[( smallestX + 3u ) % 4].y, corners[( smallestX + 2u ) % 4].x, corners[( smallestX + 1u ) % 4].y );
+
+ // Return the AABB in screen-space pixels (x, y, width, height).
+ // Note: This is a algebraic simplification of: ( viewport.x - aabb.width ) / 2 - ( ( aabb.width / 2 ) + aabb.x ) per axis.
+ Vector4 aabbInScreen( static_cast<float>( viewportWidth ) * 0.5f - aabb.z,
+ static_cast<float>( viewportHeight ) * 0.5f - aabb.w,
+ static_cast<float>( viewportWidth ) * 0.5f - aabb.x,
+ static_cast<float>( viewportHeight ) * 0.5f - aabb.y );
+
+ int x = static_cast< int >( roundf( aabbInScreen.x ) );
+ int y = static_cast< int >( roundf( aabbInScreen.y ) );
+ int z = static_cast< int >( roundf( aabbInScreen.z ) );
+ int w = static_cast< int >( roundf( aabbInScreen.w ) );
+
+ return ClippingBox( x, y, z - x, w - y );
}
-const Matrix& RenderItem::GetModelViewMatrix() const
+void RenderItem::operator delete( void* ptr )
{
- return mModelViewMatrix;
+ gRenderItemPool.Free( static_cast<RenderItem*>( ptr ) );
}
+
} // namespace SceneGraph
} // namespace Internal
projects / platform / core / uifw / dali-core.git / blobdiff