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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"

#include "dx_bitmap.hxx"
#include "dx_graphicsprovider.hxx"
#include "dx_impltools.hxx"

#include <canvas/debug.hxx>
#include <tools/diagnose_ex.h>

#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/range/b2irange.hxx>

#if defined(DX_DEBUG_IMAGES) 
# if OSL_DEBUG_LEVEL > 0
#  include <imdebug.h>
#  undef min
#  undef max
# endif
#endif

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

namespace dxcanvas
{
	//////////////////////////////////////////////////////////////////////////////////
	// DXBitmap::DXBitmap
	//////////////////////////////////////////////////////////////////////////////////

    DXBitmap::DXBitmap( const BitmapSharedPtr& rBitmap,
                        bool				   bWithAlpha ) : 
        mpGdiPlusUser( GDIPlusUser::createInstance() ),
        maSize(rBitmap->GetWidth(),rBitmap->GetHeight()),
		mpBitmap(rBitmap),
        mpGraphics(tools::createGraphicsFromBitmap(mpBitmap)),
        mbAlpha(bWithAlpha)
    {
    }

	DXBitmap::DXBitmap( const ::basegfx::B2IVector& rSize,
						bool						bWithAlpha ) : 
        mpGdiPlusUser( GDIPlusUser::createInstance() ),
        maSize(rSize),
		mpBitmap(),
        mpGraphics(),
        mbAlpha(bWithAlpha)
	{
		// create container for pixel data
		if(mbAlpha)
		{
			mpBitmap.reset( 
				new Gdiplus::Bitmap( 
					maSize.getX(),
					maSize.getY(),
					PixelFormat32bppARGB));
		}
		else
		{
			mpBitmap.reset( 
				new Gdiplus::Bitmap( 
					maSize.getX(),
					maSize.getY(),
					PixelFormat24bppRGB));
		}

        mpGraphics.reset( tools::createGraphicsFromBitmap(mpBitmap) );
	}

    BitmapSharedPtr DXBitmap::getBitmap() const
    {
        return mpBitmap;
    }

    GraphicsSharedPtr DXBitmap::getGraphics()
    {
        return mpGraphics;
    }

    ::basegfx::B2IVector DXBitmap::getSize() const
    {
        return maSize;
    }

    bool DXBitmap::hasAlpha() const
    {
        return mbAlpha;
    }

    uno::Sequence< sal_Int8 > DXBitmap::getData( rendering::IntegerBitmapLayout&     /*bitmapLayout*/, 
                                                 const geometry::IntegerRectangle2D& rect )
    {
        uno::Sequence< sal_Int8 > aRes( (rect.X2-rect.X1)*(rect.Y2-rect.Y1)*4 ); // TODO(F1): Be format-agnostic here

        const Gdiplus::Rect aRect( tools::gdiPlusRectFromIntegerRectangle2D( rect ) );

        Gdiplus::BitmapData aBmpData;
        aBmpData.Width		 = rect.X2-rect.X1;
        aBmpData.Height		 = rect.Y2-rect.Y1;
        aBmpData.Stride 	 = 4*aBmpData.Width;
        aBmpData.PixelFormat = PixelFormat32bppARGB;
        aBmpData.Scan0		 = aRes.getArray(); 

        // TODO(F1): Support more pixel formats natively

        // read data from bitmap
        if( Gdiplus::Ok != mpBitmap->LockBits( &aRect,
                                                      Gdiplus::ImageLockModeRead | Gdiplus::ImageLockModeUserInputBuf,
                                                      PixelFormat32bppARGB, // TODO(F1): Adapt to
                                                      // Graphics native
                                                      // format/change
                                                      // getMemoryLayout
                                                      &aBmpData ) )
        {
            // failed to lock, bail out
            return uno::Sequence< sal_Int8 >();
        }

        mpBitmap->UnlockBits( &aBmpData );

        return aRes;
    }

    void DXBitmap::setData( const uno::Sequence< sal_Int8 >& 		data, 
                            const rendering::IntegerBitmapLayout&   /*bitmapLayout*/, 
                            const geometry::IntegerRectangle2D& 	rect )
    {
        const Gdiplus::Rect aRect( tools::gdiPlusRectFromIntegerRectangle2D( rect ) );

        Gdiplus::BitmapData aBmpData;
        aBmpData.Width		 = rect.X2-rect.X1;
        aBmpData.Height		 = rect.Y2-rect.Y1;
        aBmpData.Stride 	 = 4*aBmpData.Width;
        aBmpData.PixelFormat = PixelFormat32bppARGB;
        aBmpData.Scan0		 = (void*)data.getConstArray(); 

        // TODO(F1): Support more pixel formats natively

        if( Gdiplus::Ok != mpBitmap->LockBits( &aRect,
                                                      Gdiplus::ImageLockModeWrite | Gdiplus::ImageLockModeUserInputBuf,
                                                      PixelFormat32bppARGB, // TODO: Adapt to
                                                      // Graphics native
                                                      // format/change
                                                      // getMemoryLayout
                                                      &aBmpData ) )
        {
            throw uno::RuntimeException();
        }

        // commit data to bitmap
        mpBitmap->UnlockBits( &aBmpData );
    }

    void DXBitmap::setPixel( const uno::Sequence< sal_Int8 >&       color,
                             const rendering::IntegerBitmapLayout&  /*bitmapLayout*/, 
                             const geometry::IntegerPoint2D&        pos )
    {
        const geometry::IntegerSize2D aSize( maSize.getX(),maSize.getY() );

        ENSURE_ARG_OR_THROW( pos.X >= 0 && pos.X < aSize.Width, 
                             "CanvasHelper::setPixel: X coordinate out of bounds" );
        ENSURE_ARG_OR_THROW( pos.Y >= 0 && pos.Y < aSize.Height, 
                             "CanvasHelper::setPixel: Y coordinate out of bounds" );
        ENSURE_ARG_OR_THROW( color.getLength() > 3, 
                             "CanvasHelper::setPixel: not enough color components" );

        if( Gdiplus::Ok != mpBitmap->SetPixel( pos.X, pos.Y, 
                                                      Gdiplus::Color( tools::sequenceToArgb( color ))))
        {
            throw uno::RuntimeException();
        }
    }

    uno::Sequence< sal_Int8 > DXBitmap::getPixel( rendering::IntegerBitmapLayout&   /*bitmapLayout*/, 
                                                  const geometry::IntegerPoint2D&   pos )
    {
        const geometry::IntegerSize2D aSize( maSize.getX(),maSize.getY() );

        ENSURE_ARG_OR_THROW( pos.X >= 0 && pos.X < aSize.Width, 
                             "CanvasHelper::getPixel: X coordinate out of bounds" );
        ENSURE_ARG_OR_THROW( pos.Y >= 0 && pos.Y < aSize.Height, 
                             "CanvasHelper::getPixel: Y coordinate out of bounds" );

        Gdiplus::Color aColor;

        if( Gdiplus::Ok != mpBitmap->GetPixel( pos.X, pos.Y, &aColor ) )
            return uno::Sequence< sal_Int8 >();
	        
        return tools::argbToIntSequence(aColor.GetValue());
    }

}