Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 188 insertions, 0 deletions

diff --git a/slideshow/source/engine/shapes/viewbackgroundshape.cxx b/slideshow/source/engine/shapes/viewbackgroundshape.cxx
new file mode 100644
index 000000000..e0ca333ad
--- /dev/null
+++ b/slideshow/source/engine/shapes/viewbackgroundshape.cxx
@@ -0,0 +1,188 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you 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 .
+ */
+
+
+// must be first
+#include <tools/diagnose_ex.h>
+#include <sal/log.hxx>
+
+#include "viewbackgroundshape.hxx"
+#include <tools.hxx>
+
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+
+#include <com/sun/star/rendering/XCanvas.hpp>
+
+#include <canvas/canvastools.hxx>
+#include <cppcanvas/vclfactory.hxx>
+#include <cppcanvas/basegfxfactory.hxx>
+#include <cppcanvas/renderer.hxx>
+#include <cppcanvas/bitmap.hxx>
+
+using namespace ::com::sun::star;
+
+
+namespace slideshow::internal
+{
+
+        bool ViewBackgroundShape::prefetch( const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas,
+                                            const GDIMetaFileSharedPtr&         rMtf ) const
+        {
+            SAL_INFO( "slideshow", "::presentation::internal::ViewBackgroundShape::prefetch()" );
+            ENSURE_OR_RETURN_FALSE( rMtf,
+                               "ViewBackgroundShape::prefetch(): no valid metafile!" );
+
+            const ::basegfx::B2DHomMatrix& rCanvasTransform(
+                mpViewLayer->getTransformation() );
+
+            if( !mxBitmap.is() ||
+                rMtf != mpLastMtf ||
+                rCanvasTransform != maLastTransformation )
+            {
+                // buffered bitmap is invalid, re-create
+
+                // determine transformed page bounds
+                ::basegfx::B2DRectangle aTmpRect;
+                ::canvas::tools::calcTransformedRectBounds( aTmpRect,
+                                                            maBounds,
+                                                            rCanvasTransform );
+
+                // determine pixel size of bitmap (choose it one pixel
+                // larger, as polygon rendering takes one pixel more
+                // to the right and to the bottom)
+                const ::basegfx::B2ISize aBmpSizePixel(
+                    ::basegfx::fround( aTmpRect.getRange().getX() + 1),
+                    ::basegfx::fround( aTmpRect.getRange().getY() + 1) );
+
+                // create a bitmap of appropriate size
+                ::cppcanvas::BitmapSharedPtr pBitmap(
+                    ::cppcanvas::BaseGfxFactory::createBitmap(
+                        rDestinationCanvas,
+                        aBmpSizePixel ) );
+
+                ENSURE_OR_THROW( pBitmap,
+                                  "ViewBackgroundShape::prefetch(): Cannot create background bitmap" );
+
+                ::cppcanvas::BitmapCanvasSharedPtr pBitmapCanvas( pBitmap->getBitmapCanvas() );
+
+                ENSURE_OR_THROW( pBitmapCanvas,
+                                  "ViewBackgroundShape::prefetch(): Cannot create background bitmap canvas" );
+
+                // clear bitmap
+                initSlideBackground( pBitmapCanvas,
+                                     aBmpSizePixel );
+
+                // apply linear part of destination canvas transformation (linear means in this context:
+                // transformation without any translational components)
+                ::basegfx::B2DHomMatrix aLinearTransform( rCanvasTransform );
+                aLinearTransform.set( 0, 2, 0.0 );
+                aLinearTransform.set( 1, 2, 0.0 );
+                pBitmapCanvas->setTransformation( aLinearTransform );
+
+                const basegfx::B2DHomMatrix aShapeTransform(basegfx::utils::createScaleTranslateB2DHomMatrix(
+                    maBounds.getWidth(), maBounds.getHeight(),
+                    maBounds.getMinX(), maBounds.getMinY()));
+
+                ::cppcanvas::RendererSharedPtr pRenderer(
+                    ::cppcanvas::VCLFactory::createRenderer(
+                        pBitmapCanvas,
+                        *rMtf,
+                        ::cppcanvas::Renderer::Parameters() ) );
+
+                ENSURE_OR_RETURN_FALSE( pRenderer,
+                                   "ViewBackgroundShape::prefetch(): Could not create Renderer" );
+
+                pRenderer->setTransformation( aShapeTransform );
+                pRenderer->draw();
+
+                mxBitmap = pBitmap->getUNOBitmap();
+            }
+
+            mpLastMtf            = rMtf;
+            maLastTransformation = rCanvasTransform;
+
+            return mxBitmap.is();
+        }
+
+        ViewBackgroundShape::ViewBackgroundShape( const ViewLayerSharedPtr&         rViewLayer,
+                                                  const ::basegfx::B2DRectangle&    rShapeBounds ) :
+            mpViewLayer( rViewLayer ),
+            mxBitmap(),
+            mpLastMtf(),
+            maLastTransformation(),
+            maBounds( rShapeBounds )
+        {
+            ENSURE_OR_THROW( mpViewLayer, "ViewBackgroundShape::ViewBackgroundShape(): Invalid View" );
+            ENSURE_OR_THROW( mpViewLayer->getCanvas(), "ViewBackgroundShape::ViewBackgroundShape(): Invalid ViewLayer canvas" );
+        }
+
+        const ViewLayerSharedPtr& ViewBackgroundShape::getViewLayer() const
+        {
+            return mpViewLayer;
+        }
+
+        bool ViewBackgroundShape::render( const GDIMetaFileSharedPtr& rMtf ) const
+        {
+            SAL_INFO( "slideshow", "::presentation::internal::ViewBackgroundShape::draw()" );
+
+            const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas( mpViewLayer->getCanvas() );
+
+            if( !prefetch( rDestinationCanvas, rMtf ) )
+                return false;
+
+            ENSURE_OR_RETURN_FALSE( mxBitmap.is(),
+                               "ViewBackgroundShape::draw(): Invalid background bitmap" );
+
+            ::basegfx::B2DHomMatrix aTransform( mpViewLayer->getTransformation() );
+
+            // invert the linear part of the view transformation
+            // (i.e. the view transformation without translational
+            // components), to be able to leave the canvas
+            // transformation intact (would otherwise destroy possible
+            // clippings, as the clip polygon is relative to the view
+            // coordinate system).
+            aTransform.set(0,2, 0.0 );
+            aTransform.set(1,2, 0.0 );
+            aTransform.invert();
+
+            rendering::RenderState aRenderState;
+            ::canvas::tools::initRenderState( aRenderState );
+
+            ::canvas::tools::setRenderStateTransform( aRenderState, aTransform );
+
+            try
+            {
+                rDestinationCanvas->getUNOCanvas()->drawBitmap( mxBitmap,
+                                                                rDestinationCanvas->getViewState(),
+                                                                aRenderState );
+            }
+            catch( uno::Exception& )
+            {
+                TOOLS_WARN_EXCEPTION( "slideshow", "" );
+                return false;
+            }
+
+            return true;
+        }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */