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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
 * 
 * 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
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"

#include <ctype.h> // don't ask. msdev breaks otherwise...
#include <canvas/debug.hxx>
#include <canvas/verbosetrace.hxx>
#include <tools/diagnose_ex.h>

#include <rtl/logfile.hxx>
#include <rtl/math.hxx>

#include <canvas/canvastools.hxx>

#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/tools/canvastools.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolypolygonrasterconverter.hxx>
#include <basegfx/polygon/b2dpolygontriangulator.hxx>
#include <basegfx/polygon/b2dpolygoncutandtouch.hxx>

#include "dx_canvascustomsprite.hxx"
#include "dx_spritehelper.hxx"
#include "dx_impltools.hxx"

#include <memory>

using namespace ::com::sun::star;

namespace dxcanvas
{
    SpriteHelper::SpriteHelper() :
        mpSpriteCanvas(),
        mpBitmap(),
        mbTextureDirty( true ),
        mbShowSpriteBounds( false )
    {
    }
    
    void SpriteHelper::init( const geometry::RealSize2D&	 rSpriteSize,
                             const SpriteCanvasRef&			 rSpriteCanvas,
                             const IDXRenderModuleSharedPtr& rRenderModule,
                             const DXSurfaceBitmapSharedPtr	 rBitmap,
                             bool							 bShowSpriteBounds )
    {
        ENSURE_OR_THROW( rSpriteCanvas.get() && 
                          rRenderModule && 
                          rBitmap,
                          "SpriteHelper::init(): Invalid device, sprite canvas or surface" );

        mpSpriteCanvas     = rSpriteCanvas;
        mpBitmap           = rBitmap;
        mbTextureDirty     = true;
        mbShowSpriteBounds = bShowSpriteBounds;

        // also init base class
        CanvasCustomSpriteHelper::init( rSpriteSize,
                                        rSpriteCanvas.get() );
    }

    void SpriteHelper::disposing()
    {
        mpBitmap.reset();
        mpSpriteCanvas.clear();

        // forward to parent
        CanvasCustomSpriteHelper::disposing();
    }

    ::basegfx::B2DPolyPolygon SpriteHelper::polyPolygonFromXPolyPolygon2D( uno::Reference< rendering::XPolyPolygon2D >& xPoly ) const
    {
        return tools::polyPolygonFromXPolyPolygon2D( xPoly );
    }

    bool SpriteHelper::needRedraw() const
    {
        if( !mpBitmap ||
            !mpSpriteCanvas.get() )
        {
            return false; // we're disposed, no redraw necessary
        }

        if( !isActive() ||
            ::basegfx::fTools::equalZero( getAlpha() ) )
        {
            return false; // sprite is invisible
        }

        return true;
    }

    void SpriteHelper::redraw( bool& io_bSurfaceDirty ) const
    {
        if( !mpBitmap ||
            !mpSpriteCanvas.get() )
        {
            return; // we're disposed
        }

        const ::basegfx::B2DPoint& rPos( getPosPixel() );
        const double               fAlpha( getAlpha() );

		if( isActive() &&
            !::basegfx::fTools::equalZero( fAlpha ) )
        {

			// TODO(Q2): For the time being, Device does not take a target
			// surface, but always unconditionally renders to the
			// background buffer.

			// log output pos in device pixel
			VERBOSE_TRACE( "SpriteHelper::redraw(): output pos is (%f, %f)", 
                           rPos.getX(),
                           rPos.getY() );

			const double                                       fAlpha( getAlpha() );
			const ::basegfx::B2DVector&                        rSize( getSizePixel() );
			const ::basegfx::B2DHomMatrix&                     rTransform( getTransformation() );
			const uno::Reference< rendering::XPolyPolygon2D >& xClip( getClip() );

			mbTextureDirty   = false;
			io_bSurfaceDirty = false; // state taken, and processed.

			::basegfx::B2DPolyPolygon	aClipPath; // empty for no clip
			bool						bIsClipRectangular( false ); // false, if no 
																	// clip, or clip
																	// is complex

			// setup and apply clip (if any)
			// =================================

			if( xClip.is() )
			{
				aClipPath = tools::polyPolygonFromXPolyPolygon2D( xClip );

				const sal_Int32 nNumClipPolygons( aClipPath.count() );
				if( nNumClipPolygons )
				{
					// TODO(P2): hold rectangle attribute directly
					// at the XPolyPolygon2D

					// check whether the clip is rectangular
					if( nNumClipPolygons == 1 )
						if( ::basegfx::tools::isRectangle( aClipPath.getB2DPolygon( 0 ) ) )
							bIsClipRectangular = true;
				}
			}

			const ::basegfx::B2DRectangle aSourceRect( 0.0,
                                                       0.0,
                                                       rSize.getX(),
                                                       rSize.getY() );

			// draw simple rectangular area if no clip is set.
			if( !aClipPath.count() )
			{
				mpBitmap->draw(fAlpha,rPos,rTransform);
			}
			else if( bIsClipRectangular )
			{
				// apply a simple rect clip
				// ========================

				::basegfx::B2DRectangle aClipBounds( 
					::basegfx::tools::getRange( aClipPath ) );
				aClipBounds.intersect( aSourceRect );
	             
				mpBitmap->draw(fAlpha,rPos,aClipBounds,rTransform);
			}
			else
			{
				// apply clip the hard way
				// =======================

				mpBitmap->draw(fAlpha,rPos,aClipPath,rTransform);
			}

			if( mbShowSpriteBounds )
			{
				if( aClipPath.count() )
				{
					// TODO(F2): Re-enable debug output
                }
			}
		}
	}
}