--- /dev/null
- mOffscreenRootActor.SetInheritRotation( false );
+/*
+ * Copyright (c) 2015 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-toolkit/internal/text/clipping/text-clipper.h>
+
+// EXTERNAL INCLUDES
+#include <algorithm>
+#include <dali/public-api/common/stage.h>
+#include <dali/public-api/render-tasks/render-task-list.h>
+#include <dali/integration-api/debug.h>
+
+namespace
+{
+
+// Currently on desktop machines 2k x 2k is the maximum frame buffer size, on target is 4k x 4k.
+const float MAX_OFFSCREEN_RENDERING_SIZE = 2048.f;
+
+} // namespace
+
+
+namespace Dali
+{
+
+namespace Toolkit
+{
+
+namespace Text
+{
+
+ClipperPtr Clipper::New( const Vector2& size )
+{
+ ClipperPtr clipper( new Clipper() );
+
+ // Second-phase init
+ clipper->Initialize( size );
+
+ return clipper;
+}
+
+Actor Clipper::GetRootActor() const
+{
+ return mOffscreenRootActor;
+}
+
+ImageActor Clipper::GetImageActor() const
+{
+ return mImageActor;
+}
+
+void Clipper::Refresh( const Vector2& size )
+{
+ const Size offscreenSize( std::min( MAX_OFFSCREEN_RENDERING_SIZE, size.width ),
+ std::min( MAX_OFFSCREEN_RENDERING_SIZE, size.height ) );
+
+ const bool sizeChanged = offscreenSize != mCurrentOffscreenSize;
+
+ if( sizeChanged )
+ {
+ // Reconfigure camera for current size.
+ mOffscreenCameraActor.SetOrthographicProjection( offscreenSize );
+
+ // Recreate frame buffer for offscreen rendering when the size changes.
+ FrameBufferImage frameBufferImage = FrameBufferImage::New( offscreenSize.width,
+ offscreenSize.height,
+ Pixel::RGBA8888 );
+ mImageActor.SetSize( offscreenSize );
+ mImageActor.SetImage( frameBufferImage );
+ mRenderTask.SetTargetFrameBuffer( frameBufferImage );
+
+ // Stores current size to avoid create new Dali resources if text changes.
+ mCurrentOffscreenSize = offscreenSize;
+ }
+
+ mRenderTask.SetRefreshRate( RenderTask::REFRESH_ONCE );
+}
+
+void Clipper::Initialize( const Vector2& size )
+{
+ const Size offscreenSize( std::min( MAX_OFFSCREEN_RENDERING_SIZE, size.width ),
+ std::min( MAX_OFFSCREEN_RENDERING_SIZE, size.height ) );
+
+ // Create a root actor and an image actor for offscreen rendering.
+ mOffscreenRootActor = Layer::New();
+ mOffscreenRootActor.SetColorMode( USE_OWN_COLOR );
+ mOffscreenRootActor.SetPositionInheritanceMode( DONT_INHERIT_POSITION );
+ mOffscreenRootActor.SetInheritScale( false );
+ mOffscreenRootActor.SetDepthTestDisabled( true );
+ mOffscreenRootActor.SetSize( offscreenSize );
+
+ mImageActor = ImageActor::New();
+ mImageActor.SetParentOrigin( ParentOrigin::CENTER );
+ mImageActor.SetBlendFunc( BlendingFactor::ONE, BlendingFactor::ONE_MINUS_SRC_ALPHA,
+ BlendingFactor::ONE, BlendingFactor::ONE );
+ mImageActor.SetScale( Vector3( 1.0f, -1.0f, 1.0f ) );
+ mImageActor.SetSize( offscreenSize );
+
+ // Creates a new camera actor.
+ mOffscreenCameraActor = CameraActor::New();
+ mOffscreenCameraActor.SetParentOrigin( ParentOrigin::CENTER );
+ mOffscreenCameraActor.SetOrthographicProjection( offscreenSize );
+ mOffscreenRootActor.Add( mOffscreenCameraActor ); // camera to shoot the offscreen text
+
+ // Creates a new render task.
+ mRenderTask = Stage::GetCurrent().GetRenderTaskList().CreateTask();
+ mRenderTask.SetSourceActor( mOffscreenRootActor );
+ mRenderTask.SetClearColor( Color::TRANSPARENT );
+ mRenderTask.SetClearEnabled( true );
+ mRenderTask.SetExclusive( true );
+ mRenderTask.SetCameraActor( mOffscreenCameraActor );
+
+ // Creates a frame buffer for offscreen rendering
+ FrameBufferImage frameBufferImage = FrameBufferImage::New( offscreenSize.width,
+ offscreenSize.height,
+ Pixel::RGBA8888 );
+ mImageActor.SetImage( frameBufferImage );
+ mRenderTask.SetTargetFrameBuffer( frameBufferImage );
+
+ // Stores current size to avoid create new Dali resources if text changes.
+ mCurrentOffscreenSize = offscreenSize;
+}
+
+Clipper::Clipper()
+{
+}
+
+Clipper::~Clipper()
+{
+ if( Stage::IsInstalled() )
+ {
+ UnparentAndReset( mOffscreenRootActor );
+ UnparentAndReset( mImageActor );
+
+ Stage::GetCurrent().GetRenderTaskList().RemoveTask( mRenderTask );
+ }
+}
+
+} // namespace Text
+
+} // namespace Toolkit
+
+} // namespace Dali