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+/* -*- 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 .
+ */
+
+#include <sal/config.h>
+
+#include <tools/diagnose_ex.h>
+
+#include <algorithm>
+
+#include <rtl/math.hxx>
+#include <sal/log.hxx>
+
+#include <com/sun/star/rendering/PanoseLetterForm.hpp>
+#include <com/sun/star/awt/FontSlant.hpp>
+
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+
+#include <canvas/canvastools.hxx>
+#include <cppcanvas/vclfactory.hxx>
+#include <cppcanvas/basegfxfactory.hxx>
+
+#include "viewshape.hxx"
+#include <tools.hxx>
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+
+ // TODO(F2): Provide sensible setup for mtf-related attributes (fill mode,
+ // char rotation etc.). Do that via mtf argument at this object
+
+ bool ViewShape::prefetch( RendererCacheEntry& io_rCacheEntry,
+ const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas,
+ const GDIMetaFileSharedPtr& rMtf,
+ const ShapeAttributeLayerSharedPtr& rAttr )
+ {
+ ENSURE_OR_RETURN_FALSE( rMtf,
+ "ViewShape::prefetch(): no valid metafile!" );
+
+ if( rMtf != io_rCacheEntry.mpMtf ||
+ rDestinationCanvas != io_rCacheEntry.getDestinationCanvas() )
+ {
+ // buffered renderer invalid, re-create
+ ::cppcanvas::Renderer::Parameters aParms;
+
+ // rendering attribute override parameter struct. For
+ // every valid attribute, the corresponding struct
+ // member is filled, which in the metafile renderer
+ // forces rendering with the given attribute.
+ if( rAttr )
+ {
+ if( rAttr->isFillColorValid() )
+ {
+ // convert RGBColor to RGBA32 integer. Note
+ // that getIntegerColor() also truncates
+ // out-of-range values appropriately
+ aParms.maFillColor =
+ rAttr->getFillColor().getIntegerColor();
+ }
+ if( rAttr->isLineColorValid() )
+ {
+ // convert RGBColor to RGBA32 integer. Note
+ // that getIntegerColor() also truncates
+ // out-of-range values appropriately
+ aParms.maLineColor =
+ rAttr->getLineColor().getIntegerColor();
+ }
+ if( rAttr->isCharColorValid() )
+ {
+ // convert RGBColor to RGBA32 integer. Note
+ // that getIntegerColor() also truncates
+ // out-of-range values appropriately
+ aParms.maTextColor =
+ rAttr->getCharColor().getIntegerColor();
+ }
+ if( rAttr->isDimColorValid() )
+ {
+ // convert RGBColor to RGBA32 integer. Note
+ // that getIntegerColor() also truncates
+ // out-of-range values appropriately
+
+ // dim color overrides all other colors
+ aParms.maFillColor =
+ aParms.maLineColor =
+ aParms.maTextColor =
+ rAttr->getDimColor().getIntegerColor();
+ }
+ if( rAttr->isFontFamilyValid() )
+ {
+ aParms.maFontName =
+ rAttr->getFontFamily();
+ }
+ if( rAttr->isCharScaleValid() )
+ {
+ ::basegfx::B2DHomMatrix aMatrix;
+
+ // enlarge text by given scale factor. Do that
+ // with the middle of the shape as the center
+ // of scaling.
+ aMatrix.translate( -0.5, -0.5 );
+ aMatrix.scale( rAttr->getCharScale(),
+ rAttr->getCharScale() );
+ aMatrix.translate( 0.5, 0.5 );
+
+ aParms.maTextTransformation = aMatrix;
+ }
+ if( rAttr->isCharWeightValid() )
+ {
+ aParms.maFontWeight =
+ static_cast< sal_Int8 >(
+ ::basegfx::fround(
+ ::std::max( 0.0,
+ ::std::min( 11.0,
+ rAttr->getCharWeight() / 20.0 ) ) ) );
+ }
+ if( rAttr->isCharPostureValid() )
+ {
+ aParms.maFontLetterForm =
+ rAttr->getCharPosture() == sal_Int16(awt::FontSlant_NONE) ?
+ rendering::PanoseLetterForm::ANYTHING :
+ rendering::PanoseLetterForm::OBLIQUE_CONTACT;
+ }
+ if( rAttr->isUnderlineModeValid() )
+ {
+ aParms.maFontUnderline =
+ rAttr->getUnderlineMode();
+ }
+ }
+
+ io_rCacheEntry.mpRenderer = ::cppcanvas::VCLFactory::createRenderer( rDestinationCanvas,
+ *rMtf,
+ aParms );
+
+ io_rCacheEntry.mpMtf = rMtf;
+ io_rCacheEntry.mpDestinationCanvas = rDestinationCanvas;
+
+ // also invalidate alpha compositing bitmap (created
+ // new renderer, which possibly generates different
+ // output). Do NOT invalidate, if we're incidentally
+ // rendering INTO it.
+ if( rDestinationCanvas != io_rCacheEntry.mpLastBitmapCanvas )
+ {
+ io_rCacheEntry.mpLastBitmapCanvas.reset();
+ io_rCacheEntry.mpLastBitmap.reset();
+ }
+ }
+
+ return static_cast< bool >(io_rCacheEntry.mpRenderer);
+ }
+
+ bool ViewShape::draw( const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas,
+ const GDIMetaFileSharedPtr& rMtf,
+ const ShapeAttributeLayerSharedPtr& rAttr,
+ const ::basegfx::B2DHomMatrix& rTransform,
+ const ::basegfx::B2DPolyPolygon* pClip,
+ const VectorOfDocTreeNodes& rSubsets ) const
+ {
+ ::cppcanvas::RendererSharedPtr pRenderer(
+ getRenderer( rDestinationCanvas, rMtf, rAttr ) );
+
+ ENSURE_OR_RETURN_FALSE( pRenderer, "ViewShape::draw(): Invalid renderer" );
+
+ pRenderer->setTransformation( rTransform );
+#if OSL_DEBUG_LEVEL >= 2
+ rendering::RenderState aRenderState;
+ ::canvas::tools::initRenderState(aRenderState);
+ ::canvas::tools::setRenderStateTransform(aRenderState,
+ rTransform);
+ aRenderState.DeviceColor.realloc(4);
+ aRenderState.DeviceColor[0] = 1.0;
+ aRenderState.DeviceColor[1] = 0.0;
+ aRenderState.DeviceColor[2] = 0.0;
+ aRenderState.DeviceColor[3] = 1.0;
+
+ try
+ {
+ rDestinationCanvas->getUNOCanvas()->drawLine( geometry::RealPoint2D(0.0,0.0),
+ geometry::RealPoint2D(1.0,1.0),
+ rDestinationCanvas->getViewState(),
+ aRenderState );
+ rDestinationCanvas->getUNOCanvas()->drawLine( geometry::RealPoint2D(1.0,0.0),
+ geometry::RealPoint2D(0.0,1.0),
+ rDestinationCanvas->getViewState(),
+ aRenderState );
+ }
+ catch( uno::Exception& )
+ {
+ DBG_UNHANDLED_EXCEPTION("slideshow");
+ }
+#endif
+ if( pClip )
+ pRenderer->setClip( *pClip );
+ else
+ pRenderer->setClip();
+
+ if( rSubsets.empty() )
+ {
+ return pRenderer->draw();
+ }
+ else
+ {
+ // render subsets of whole metafile
+
+
+ bool bRet(true);
+ for( const auto& rSubset : rSubsets )
+ {
+ if( !pRenderer->drawSubset( rSubset.getStartIndex(),
+ rSubset.getEndIndex() ) )
+ bRet = false;
+ }
+
+ return bRet;
+ }
+ }
+
+ namespace
+ {
+ /// Convert untransformed shape update area to device pixel.
+ ::basegfx::B2DRectangle shapeArea2AreaPixel( const ::basegfx::B2DHomMatrix& rCanvasTransformation,
+ const ::basegfx::B2DRectangle& rUntransformedArea )
+ {
+ // convert area to pixel, and add anti-aliasing border
+
+ // TODO(P1): Should the view transform some
+ // day contain rotation/shear, transforming
+ // the original bounds with the total
+ // transformation might result in smaller
+ // overall bounds.
+
+ ::basegfx::B2DRectangle aBoundsPixel;
+ ::canvas::tools::calcTransformedRectBounds( aBoundsPixel,
+ rUntransformedArea,
+ rCanvasTransformation );
+
+ // add antialiasing border around the shape (AA
+ // touches pixel _outside_ the nominal bound rect)
+ aBoundsPixel.grow( ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE );
+
+ return aBoundsPixel;
+ }
+
+ /// Convert shape unit rect to device pixel.
+ ::basegfx::B2DRectangle calcUpdateAreaPixel( const ::basegfx::B2DRectangle& rUnitBounds,
+ const ::basegfx::B2DHomMatrix& rShapeTransformation,
+ const ::basegfx::B2DHomMatrix& rCanvasTransformation,
+ const ShapeAttributeLayerSharedPtr& pAttr )
+ {
+ // calc update area for whole shape (including
+ // character scaling)
+ return shapeArea2AreaPixel( rCanvasTransformation,
+ getShapeUpdateArea( rUnitBounds,
+ rShapeTransformation,
+ pAttr ) );
+ }
+ }
+
+ bool ViewShape::renderSprite( const ViewLayerSharedPtr& rViewLayer,
+ const GDIMetaFileSharedPtr& rMtf,
+ const ::basegfx::B2DRectangle& rOrigBounds,
+ const ::basegfx::B2DRectangle& rBounds,
+ const ::basegfx::B2DRectangle& rUnitBounds,
+ UpdateFlags nUpdateFlags,
+ const ShapeAttributeLayerSharedPtr& pAttr,
+ const VectorOfDocTreeNodes& rSubsets,
+ double nPrio,
+ bool bIsVisible ) const
+ {
+ // TODO(P1): For multiple views, it might pay off to reorg Shape and ViewShape,
+ // in that all the common setup steps here are refactored to Shape (would then
+ // have to be performed only _once_ per Shape paint).
+
+ if( !bIsVisible ||
+ rUnitBounds.isEmpty() ||
+ rOrigBounds.isEmpty() ||
+ rBounds.isEmpty() )
+ {
+ // shape is invisible or has zero size, no need to
+ // update anything.
+ if( mpSprite )
+ mpSprite->hide();
+
+ return true;
+ }
+
+
+ // calc sprite position, size and content transformation
+ // =====================================================
+
+ // the shape transformation for a sprite is always a
+ // simple scale-up to the nominal shape size. Everything
+ // else is handled via the sprite transformation
+ ::basegfx::B2DHomMatrix aNonTranslationalShapeTransformation;
+ aNonTranslationalShapeTransformation.scale( rOrigBounds.getWidth(),
+ rOrigBounds.getHeight() );
+ ::basegfx::B2DHomMatrix aShapeTransformation( aNonTranslationalShapeTransformation );
+ aShapeTransformation.translate( rOrigBounds.getMinX(),
+ rOrigBounds.getMinY() );
+
+ const ::basegfx::B2DHomMatrix& rCanvasTransform(
+ rViewLayer->getSpriteTransformation() );
+
+ // area actually needed for the sprite
+ const ::basegfx::B2DRectangle& rSpriteBoundsPixel(
+ calcUpdateAreaPixel( rUnitBounds,
+ aShapeTransformation,
+ rCanvasTransform,
+ pAttr ) );
+
+ // actual area for the shape (without subsetting, but
+ // including char scaling)
+ const ::basegfx::B2DRectangle& rShapeBoundsPixel(
+ calcUpdateAreaPixel( ::basegfx::B2DRectangle(0.0,0.0,1.0,1.0),
+ aShapeTransformation,
+ rCanvasTransform,
+ pAttr ) );
+
+ // nominal area for the shape (without subsetting, without
+ // char scaling). NOTE: to cancel the shape translation,
+ // contained in rSpriteBoundsPixel, this is _without_ any
+ // translational component.
+ ::basegfx::B2DRectangle aLogShapeBounds;
+ const ::basegfx::B2DRectangle& rNominalShapeBoundsPixel(
+ shapeArea2AreaPixel( rCanvasTransform,
+ ::canvas::tools::calcTransformedRectBounds(
+ aLogShapeBounds,
+ ::basegfx::B2DRectangle(0.0,0.0,1.0,1.0),
+ aNonTranslationalShapeTransformation ) ) );
+
+ // create (or resize) sprite with sprite's pixel size, if
+ // not done already
+ const ::basegfx::B2DSize& rSpriteSizePixel(rSpriteBoundsPixel.getRange());
+ if( !mpSprite )
+ {
+ mpSprite = std::make_shared<AnimatedSprite>( mpViewLayer,
+ rSpriteSizePixel,
+ nPrio );
+ }
+ else
+ {
+ // TODO(F2): when the sprite _actually_ gets resized,
+ // content needs a repaint!
+ mpSprite->resize( rSpriteSizePixel );
+ }
+
+ ENSURE_OR_RETURN_FALSE( mpSprite, "ViewShape::renderSprite(): No sprite" );
+
+ SAL_INFO("slideshow", "ViewShape::renderSprite(): Rendering sprite " <<
+ mpSprite.get() );
+
+
+ // always show the sprite (might have been hidden before)
+ mpSprite->show();
+
+ // determine center of sprite output position in pixel
+ // (assumption here: all shape transformations have the
+ // shape center as the pivot point). From that, subtract
+ // distance of rSpriteBoundsPixel's left, top edge from
+ // rShapeBoundsPixel's center. This moves the sprite at
+ // the appropriate output position within the virtual
+ // rShapeBoundsPixel area.
+ ::basegfx::B2DPoint aSpritePosPixel( rBounds.getCenter() );
+ aSpritePosPixel *= rCanvasTransform;
+ aSpritePosPixel -= rShapeBoundsPixel.getCenter() - rSpriteBoundsPixel.getMinimum();
+
+ // the difference between rShapeBoundsPixel and
+ // rSpriteBoundsPixel upper, left corner is: the offset we
+ // have to move sprite output to the right, top (to make
+ // the desired subset content visible at all)
+ const ::basegfx::B2DSize& rSpriteCorrectionOffset(
+ rSpriteBoundsPixel.getMinimum() - rNominalShapeBoundsPixel.getMinimum() );
+
+ // offset added top, left for anti-aliasing (otherwise,
+ // shapes fully filling the sprite will have anti-aliased
+ // pixel cut off)
+ const ::basegfx::B2DSize aAAOffset(
+ ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE,
+ ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE );
+
+ // set pixel output offset to sprite: we always leave
+ // ANTIALIASING_EXTRA_SIZE room atop and to the left, and,
+ // what's more, for subsetted shapes, we _have_ to cancel
+ // the effect of the shape renderer outputting the subset
+ // at its absolute position inside the shape, instead of
+ // at the origin.
+ // NOTE: As for now, sprites are always positioned on
+ // integer pixel positions on screen, have to round to
+ // nearest integer here, too
+ mpSprite->setPixelOffset(
+ aAAOffset - ::basegfx::B2DSize(
+ ::basegfx::fround( rSpriteCorrectionOffset.getX() ),
+ ::basegfx::fround( rSpriteCorrectionOffset.getY() ) ) );
+
+ // always set sprite position and transformation, since
+ // they do not relate directly to the update flags
+ // (e.g. sprite position changes when sprite size changes)
+ mpSprite->movePixel( aSpritePosPixel );
+ mpSprite->transform( getSpriteTransformation( rSpriteSizePixel,
+ rOrigBounds.getRange(),
+ pAttr ) );
+
+
+ // process flags
+ // =============
+
+ bool bRedrawRequired( mbForceUpdate || (nUpdateFlags & UpdateFlags::Force) );
+
+ if( mbForceUpdate || (nUpdateFlags & UpdateFlags::Alpha) )
+ {
+ mpSprite->setAlpha( (pAttr && pAttr->isAlphaValid()) ?
+ std::clamp(pAttr->getAlpha(),
+ 0.0,
+ 1.0) :
+ 1.0 );
+ }
+ if( mbForceUpdate || (nUpdateFlags & UpdateFlags::Clip) )
+ {
+ if( pAttr && pAttr->isClipValid() )
+ {
+ ::basegfx::B2DPolyPolygon aClipPoly( pAttr->getClip() );
+
+ // extract linear part of canvas view transformation
+ // (linear means: without translational components)
+ ::basegfx::B2DHomMatrix aViewTransform(
+ mpViewLayer->getTransformation() );
+ aViewTransform.set( 0, 2, 0.0 );
+ aViewTransform.set( 1, 2, 0.0 );
+
+ // make the clip 2*ANTIALIASING_EXTRA_SIZE larger
+ // such that it's again centered over the sprite.
+ aViewTransform.scale(rSpriteSizePixel.getX()/
+ (rSpriteSizePixel.getX()-2*::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE),
+ rSpriteSizePixel.getY()/
+ (rSpriteSizePixel.getY()-2*::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE));
+
+ // transform clip polygon from view to device
+ // coordinate space
+ aClipPoly.transform( aViewTransform );
+
+ mpSprite->clip( aClipPoly );
+ }
+ else
+ mpSprite->clip();
+ }
+ if( mbForceUpdate || (nUpdateFlags & UpdateFlags::Content) )
+ {
+ bRedrawRequired = true;
+
+ // TODO(P1): maybe provide some appearance change methods at
+ // the Renderer interface
+
+ // force the renderer to be regenerated below, for the
+ // different attributes to take effect
+ invalidateRenderer();
+ }
+
+ mbForceUpdate = false;
+
+ if( !bRedrawRequired )
+ return true;
+
+
+ // sprite needs repaint - output to sprite canvas
+ // ==============================================
+
+ ::cppcanvas::CanvasSharedPtr pContentCanvas( mpSprite->getContentCanvas() );
+
+ return draw( pContentCanvas,
+ rMtf,
+ pAttr,
+ aShapeTransformation,
+ nullptr, // clipping is done via Sprite::clip()
+ rSubsets );
+ }
+
+ bool ViewShape::render( const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas,
+ const GDIMetaFileSharedPtr& rMtf,
+ const ::basegfx::B2DRectangle& rBounds,
+ const ::basegfx::B2DRectangle& rUpdateBounds,
+ UpdateFlags nUpdateFlags,
+ const ShapeAttributeLayerSharedPtr& pAttr,
+ const VectorOfDocTreeNodes& rSubsets,
+ bool bIsVisible ) const
+ {
+ // TODO(P1): For multiple views, it might pay off to reorg Shape and ViewShape,
+ // in that all the common setup steps here are refactored to Shape (would then
+ // have to be performed only _once_ per Shape paint).
+
+ if( !bIsVisible )
+ {
+ SAL_INFO("slideshow", "ViewShape::render(): skipping shape " << this );
+
+ // shape is invisible, no need to update anything.
+ return true;
+ }
+
+ // since we have no sprite here, _any_ update request
+ // translates into a required redraw.
+ bool bRedrawRequired( mbForceUpdate || nUpdateFlags != UpdateFlags::NONE );
+
+ if( nUpdateFlags & UpdateFlags::Content )
+ {
+ // TODO(P1): maybe provide some appearance change methods at
+ // the Renderer interface
+
+ // force the renderer to be regenerated below, for the
+ // different attributes to take effect
+ invalidateRenderer();
+ }
+
+ mbForceUpdate = false;
+
+ if( !bRedrawRequired )
+ return true;
+
+ SAL_INFO( "slideshow", "ViewShape::render(): rendering shape " <<
+ this <<
+ " at position (" <<
+ rBounds.getMinX() << "," <<
+ rBounds.getMinY() << ")" );
+
+
+ // shape needs repaint - setup all that's needed
+
+
+ std::optional<basegfx::B2DPolyPolygon> aClip;
+
+ if( pAttr )
+ {
+ // setup clip poly
+ if( pAttr->isClipValid() )
+ aClip = pAttr->getClip();
+
+ // emulate global shape alpha by first rendering into
+ // a temp bitmap, and then to screen (this would have
+ // been much easier if we'd be currently a sprite -
+ // see above)
+ if( pAttr->isAlphaValid() )
+ {
+ const double nAlpha( pAttr->getAlpha() );
+
+ if( !::basegfx::fTools::equalZero( nAlpha ) &&
+ !::rtl::math::approxEqual(nAlpha, 1.0) )
+ {
+ // render with global alpha - have to prepare
+ // a bitmap, and render that with modulated
+ // alpha
+
+
+ const ::basegfx::B2DHomMatrix aTransform(
+ getShapeTransformation( rBounds,
+ pAttr ) );
+
+ // TODO(P1): Should the view transform some
+ // day contain rotation/shear, transforming
+ // the original bounds with the total
+ // transformation might result in smaller
+ // overall bounds.
+
+ // determine output rect of _shape update
+ // area_ in device pixel
+ const ::basegfx::B2DHomMatrix aCanvasTransform(
+ rDestinationCanvas->getTransformation() );
+ ::basegfx::B2DRectangle aTmpRect;
+ ::canvas::tools::calcTransformedRectBounds( aTmpRect,
+ rUpdateBounds,
+ aCanvasTransform );
+
+ // pixel size of cache bitmap: round up to
+ // nearest int
+ const ::basegfx::B2ISize aBmpSize( static_cast<sal_Int32>( aTmpRect.getWidth() )+1,
+ static_cast<sal_Int32>( aTmpRect.getHeight() )+1 );
+
+ // try to fetch temporary surface for alpha
+ // compositing (to achieve the global alpha
+ // blend effect, have to first render shape as
+ // a whole, then blit that surface with global
+ // alpha to the destination)
+ const RendererCacheVector::iterator aCompositingSurface(
+ getCacheEntry( rDestinationCanvas ) );
+
+ if( !aCompositingSurface->mpLastBitmapCanvas ||
+ aCompositingSurface->mpLastBitmapCanvas->getSize() != aBmpSize )
+ {
+ // create a bitmap of appropriate size
+ ::cppcanvas::BitmapSharedPtr pBitmap(
+ ::cppcanvas::BaseGfxFactory::createAlphaBitmap(
+ rDestinationCanvas,
+ aBmpSize ) );
+
+ ENSURE_OR_THROW(pBitmap,
+ "ViewShape::render(): Could not create compositing surface");
+
+ aCompositingSurface->mpDestinationCanvas = rDestinationCanvas;
+ aCompositingSurface->mpLastBitmap = pBitmap;
+ aCompositingSurface->mpLastBitmapCanvas = pBitmap->getBitmapCanvas();
+ }
+
+ // buffer aCompositingSurface iterator content
+ // - said one might get invalidated during
+ // draw() below.
+ ::cppcanvas::BitmapCanvasSharedPtr pBitmapCanvas(
+ aCompositingSurface->mpLastBitmapCanvas );
+
+ ::cppcanvas::BitmapSharedPtr pBitmap(
+ aCompositingSurface->mpLastBitmap);
+
+ // setup bitmap canvas transformation -
+ // which happens to be the destination
+ // canvas transformation without any
+ // translational components.
+
+ // But then, the render transformation as
+ // calculated by getShapeTransformation()
+ // above outputs the shape at its real
+ // destination position. Thus, we have to
+ // offset the output back to the origin,
+ // for which we simply plug in the
+ // negative position of the left, top edge
+ // of the shape's bound rect in device
+ // pixel into aLinearTransform below.
+ ::basegfx::B2DHomMatrix aAdjustedCanvasTransform( aCanvasTransform );
+ aAdjustedCanvasTransform.translate( -aTmpRect.getMinX(),
+ -aTmpRect.getMinY() );
+
+ pBitmapCanvas->setTransformation( aAdjustedCanvasTransform );
+
+ // TODO(P2): If no update flags, or only
+ // alpha_update is set, we can save us the
+ // rendering into the bitmap (uh, it's not
+ // _that_ easy - for a forced redraw,
+ // e.g. when ending an animation, we always
+ // get UPDATE_FORCE here).
+
+ // render into this bitmap
+ if( !draw( pBitmapCanvas,
+ rMtf,
+ pAttr,
+ aTransform,
+ !aClip ? nullptr : &(*aClip),
+ rSubsets ) )
+ {
+ return false;
+ }
+
+ // render bitmap to screen, with given global
+ // alpha. Since the bitmap already contains
+ // pixel-equivalent output, we have to use the
+ // inverse view transformation, adjusted with
+ // the final shape output position (note:
+ // cannot simply change the view
+ // transformation here, as that would affect a
+ // possibly set clip!)
+ ::basegfx::B2DHomMatrix aBitmapTransform( aCanvasTransform );
+ OSL_ENSURE( aBitmapTransform.isInvertible(),
+ "ViewShape::render(): View transformation is singular!" );
+
+ aBitmapTransform.invert();
+
+ const basegfx::B2DHomMatrix aTranslation(basegfx::utils::createTranslateB2DHomMatrix(
+ aTmpRect.getMinX(), aTmpRect.getMinY()));
+
+ aBitmapTransform = aBitmapTransform * aTranslation;
+ pBitmap->setTransformation( aBitmapTransform );
+
+ // finally, render bitmap alpha-modulated
+ pBitmap->drawAlphaModulated( nAlpha );
+
+ return true;
+ }
+ }
+ }
+
+ // retrieve shape transformation, _with_ shape translation
+ // to actual page position.
+ const ::basegfx::B2DHomMatrix aTransform(
+ getShapeTransformation( rBounds,
+ pAttr ) );
+
+ return draw( rDestinationCanvas,
+ rMtf,
+ pAttr,
+ aTransform,
+ !aClip ? nullptr : &(*aClip),
+ rSubsets );
+ }
+
+
+ ViewShape::ViewShape( const ViewLayerSharedPtr& rViewLayer ) :
+ mpViewLayer( rViewLayer ),
+ maRenderers(),
+ mpSprite(),
+ mbAnimationMode( false ),
+ mbForceUpdate( true )
+ {
+ ENSURE_OR_THROW( mpViewLayer, "ViewShape::ViewShape(): Invalid View" );
+ }
+
+ const ViewLayerSharedPtr& ViewShape::getViewLayer() const
+ {
+ return mpViewLayer;
+ }
+
+ ViewShape::RendererCacheVector::iterator ViewShape::getCacheEntry( const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas ) const
+ {
+ // lookup destination canvas - is there already a renderer
+ // created for that target?
+ RendererCacheVector::iterator aIter;
+ const RendererCacheVector::iterator aEnd( maRenderers.end() );
+
+ // already there?
+ if( (aIter=::std::find_if( maRenderers.begin(),
+ aEnd,
+ [&rDestinationCanvas]( const RendererCacheEntry& rCacheEntry )
+ { return rDestinationCanvas == rCacheEntry.getDestinationCanvas(); } ) ) == aEnd )
+ {
+ if( maRenderers.size() >= MAX_RENDER_CACHE_ENTRIES )
+ {
+ // cache size exceeded - prune entries. For now,
+ // simply remove the first one, which of course
+ // breaks for more complex access schemes. But in
+ // general, this leads to most recently used
+ // entries to reside at the end of the vector.
+ maRenderers.erase( maRenderers.begin() );
+
+ // ATTENTION: after this, both aIter and aEnd are
+ // invalid!
+ }
+
+ // not yet in cache - add default-constructed cache
+ // entry, to have something to return
+ maRenderers.emplace_back( );
+ aIter = maRenderers.end()-1;
+ }
+
+ return aIter;
+ }
+
+ ::cppcanvas::RendererSharedPtr ViewShape::getRenderer( const ::cppcanvas::CanvasSharedPtr& rDestinationCanvas,
+ const GDIMetaFileSharedPtr& rMtf,
+ const ShapeAttributeLayerSharedPtr& rAttr ) const
+ {
+ // lookup destination canvas - is there already a renderer
+ // created for that target?
+ const RendererCacheVector::iterator aIter(
+ getCacheEntry( rDestinationCanvas ) );
+
+ // now we have a valid entry, either way. call prefetch()
+ // on it, nevertheless - maybe the metafile changed, and
+ // the renderer still needs an update (prefetch() will
+ // detect that)
+ if( prefetch( *aIter,
+ rDestinationCanvas,
+ rMtf,
+ rAttr ) )
+ {
+ return aIter->mpRenderer;
+ }
+ else
+ {
+ // prefetch failed - renderer is invalid
+ return ::cppcanvas::RendererSharedPtr();
+ }
+ }
+
+ void ViewShape::invalidateRenderer() const
+ {
+ // simply clear the cache. Subsequent getRenderer() calls
+ // will regenerate the Renderers.
+ maRenderers.clear();
+ }
+
+ ::basegfx::B2DSize ViewShape::getAntialiasingBorder() const
+ {
+ ENSURE_OR_THROW( mpViewLayer->getCanvas(),
+ "ViewShape::getAntialiasingBorder(): Invalid ViewLayer canvas" );
+
+ const ::basegfx::B2DHomMatrix& rViewTransform(
+ mpViewLayer->getTransformation() );
+
+ // TODO(F1): As a quick shortcut (did not want to invert
+ // whole matrix here), taking only scale components of
+ // view transformation matrix. This will be wrong when
+ // e.g. shearing is involved.
+ const double nXBorder( ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE / rViewTransform.get(0,0) );
+ const double nYBorder( ::cppcanvas::Canvas::ANTIALIASING_EXTRA_SIZE / rViewTransform.get(1,1) );
+
+ return ::basegfx::B2DSize( nXBorder,
+ nYBorder );
+ }
+
+ void ViewShape::enterAnimationMode()
+ {
+ mbForceUpdate = true;
+ mbAnimationMode = true;
+ }
+
+ void ViewShape::leaveAnimationMode()
+ {
+ mpSprite.reset();
+ mbAnimationMode = false;
+ mbForceUpdate = true;
+ }
+
+ bool ViewShape::update( const GDIMetaFileSharedPtr& rMtf,
+ const RenderArgs& rArgs,
+ UpdateFlags nUpdateFlags,
+ bool bIsVisible ) const
+ {
+ ENSURE_OR_RETURN_FALSE( mpViewLayer->getCanvas(), "ViewShape::update(): Invalid layer canvas" );
+
+ // Shall we render to a sprite, or to a plain canvas?
+ if( mbAnimationMode )
+ return renderSprite( mpViewLayer,
+ rMtf,
+ rArgs.maOrigBounds,
+ rArgs.maBounds,
+ rArgs.maUnitBounds,
+ nUpdateFlags,
+ rArgs.mrAttr,
+ rArgs.mrSubsets,
+ rArgs.mnShapePriority,
+ bIsVisible );
+ else
+ return render( mpViewLayer->getCanvas(),
+ rMtf,
+ rArgs.maBounds,
+ rArgs.maUpdateBounds,
+ nUpdateFlags,
+ rArgs.mrAttr,
+ rArgs.mrSubsets,
+ bIsVisible );
+ }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 11:42:28 +0000