Пример #1
0
        internal ImageRenderer(ImageBuffer owner)
            : base()
        {
            m_Owner = owner;

            rasterizer_scanline_aa rasterizer = new rasterizer_scanline_aa();
            ImageClippingProxy imageClippingProxy = new ImageClippingProxy(owner);

            Initialize(imageClippingProxy, rasterizer);
            ScanlineCache = new scanline_packed_8();
        }
Пример #2
0
        /*
         *  void draw_curve(Pattern patt, IRasterizer ras, Renderer ren, PatternSource src, IVertexSource vs)
         *  {
         *      patt.create(src);
         *      ren.scale_x(m_scale_x.value());
         *      ren.start_x(m_start_x.value());
         *      ras.add_path(vs);
         *  }
         */

        public override void  OnDraw()
        {
        #if SourceDepth24
            FormatRGB pf = new FormatRGB(rbuf_window(), new BlenderBGR());
        #else
            FormatRGBA pf = new FormatRGBA(rbuf_window(), new BlenderBGRA());
        #endif
            FormatClippingProxy ren_base = new FormatClippingProxy(pf);

            ren_base.clear(new RGBA_Doubles(1.0, 1.0, .95));

            rasterizer_scanline_aa ras = new rasterizer_scanline_aa();
            scanline_packed_8      sl  = new scanline_packed_8();

            // Pattern source. Must have an interface:
            // width() const
            // height() const
            // pixel(int x, int y) const
            // Any agg::renderer_base<> or derived
            // is good for the use as a source.
            //-----------------------------------
            pattern_src_brightness_to_alpha_RGBA_Bytes p1 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(0));
            pattern_src_brightness_to_alpha_RGBA_Bytes p2 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(1));
            pattern_src_brightness_to_alpha_RGBA_Bytes p3 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(2));
            pattern_src_brightness_to_alpha_RGBA_Bytes p4 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(3));
            pattern_src_brightness_to_alpha_RGBA_Bytes p5 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(4));
            pattern_src_brightness_to_alpha_RGBA_Bytes p6 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(5));
            pattern_src_brightness_to_alpha_RGBA_Bytes p7 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(6));
            pattern_src_brightness_to_alpha_RGBA_Bytes p8 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(7));
            pattern_src_brightness_to_alpha_RGBA_Bytes p9 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(8));

            //pattern_filter_bilinear_rgba
            pattern_filter_bilinear_RGBA_Bytes fltr;           // Filtering functor

            // agg::line_image_pattern is the main container for the patterns. It creates
            // a copy of the patterns extended according to the needs of the filter.
            // agg::line_image_pattern can operate with arbitrary image width, but if the
            // width of the pattern is power of 2, it's better to use the modified
            // version agg::line_image_pattern_pow2 because it works about 15-25 percent
            // faster than agg::line_image_pattern (because of using simple masking instead
            // of expensive '%' operation).

            //typedef agg::line_image_pattern<agg::pattern_filter_bilinear_RGBA_Bytes> pattern_type;
            //typedef agg::renderer_base<pixfmt> base_ren_type;
            //typedef agg::renderer_outline_image<base_ren_type, pattern_type> renderer_type;
            //typedef agg::rasterizer_outline_aa<renderer_type>                rasterizer_type;

            //-- Create with specifying the source
            //pattern_type patt(fltr, src);

            //-- Create uninitialized and set the source
            line_image_pattern patt = new line_image_pattern(new pattern_filter_bilinear_RGBA_Bytes());
            //renderer_outline_image ren_img = new renderer_outline_image(, patt);

            /*
             * renderer_type ren_img(ren_base, patt);
             * rasterizer_type ras_img(ren_img);
             *
             * draw_curve(patt, ras_img, ren_img, p1, m_curve1.curve());
             * draw_curve(patt, ras_img, ren_img, p2, m_curve2.curve());
             * draw_curve(patt, ras_img, ren_img, p3, m_curve3.curve());
             * draw_curve(patt, ras_img, ren_img, p4, m_curve4.curve());
             * draw_curve(patt, ras_img, ren_img, p5, m_curve5.curve());
             * draw_curve(patt, ras_img, ren_img, p6, m_curve6.curve());
             * draw_curve(patt, ras_img, ren_img, p7, m_curve7.curve());
             * draw_curve(patt, ras_img, ren_img, p8, m_curve8.curve());
             * draw_curve(patt, ras_img, ren_img, p9, m_curve9.curve());
             */
            base.OnDraw();
        }
Пример #3
0
        public override void OnDraw(RendererBase renderer)
        {
            GammaLookUpTable gamma = new GammaLookUpTable(m_gamma.value());
            IBlender NormalBlender = new BlenderBGRA();
            IBlender GammaBlender = new BlenderGammaBGRA(gamma);
            ImageBuffer rasterNormal = new ImageBuffer(NewRenderer().DestImage, NormalBlender);
            ImageBuffer rasterGamma = new ImageBuffer(NewRenderer().DestImage, GammaBlender);
            ImageClippingProxy clippingProxyNormal = new ImageClippingProxy(rasterNormal);
            ImageClippingProxy clippingProxyGamma = new ImageClippingProxy(rasterGamma);

            clippingProxyNormal.clear(new RGBA_Doubles(0,0,0));

            rasterizer_scanline_aa ras = new rasterizer_scanline_aa();
            scanline_packed_8 sl = new scanline_packed_8();

            VertexSource.Ellipse e = new VertexSource.Ellipse();

            // TODO: If you drag the control circles below the bottom of the window we get an exception.  This does not happen in AGG.
            // It needs to be debugged.  Turning on clipping fixes it.  But standard agg works without clipping.  Could be a bigger problem than this.
            //ras.clip_box(0, 0, width(), height());

            // Render two "control" circles
            e.init(m_x[0], m_y[0], 3, 3, 16);
            ras.add_path(e);
            Renderer.RenderSolid(clippingProxyNormal, ras, sl, new RGBA_Bytes(127, 127, 127));
            e.init(m_x[1], m_y[1], 3, 3, 16);
            ras.add_path(e);
            Renderer.RenderSolid(clippingProxyNormal, ras, sl, new RGBA_Bytes(127, 127, 127));

            // Creating a rounded rectangle
            VertexSource.RoundedRect r = new VertexSource.RoundedRect(m_x[0], m_y[0], m_x[1], m_y[1], 10);
            r.normalize_radius();

            // Drawing as an outline
                conv_stroke p = new conv_stroke(r);
                p.width(1.0);
                ras.add_path(p);

                //Renderer.RenderSolid(clippingProxyGamma, ras, sl, new RGBA_Bytes(0, 0, 0));
            Renderer.RenderSolid(clippingProxyGamma, ras, sl, new RGBA_Bytes(255, 1, 1));








            /*            
                    int i;

                    // radial line test
                    //-------------------------
                    dashed_line<rasterizer_type, 
                                renderer_scanline_type, 
                                scanline_type> dash(ras, ren_sl, sl);

                    double cx = width() / 2.0;
                    double cy = height() / 2.0;

                    ren_sl.color(agg::rgba(1.0, 1.0, 1.0, 0.2));
                    for(i = 180; i > 0; i--) 
                    {
                        double n = 2.0 * agg::pi * i / 180.0;
                        dash.draw(cx + min(cx, cy) * sin(n), cy + min(cx, cy) * cos(n),
                                  cx, cy, 
                                  1.0, (i < 90) ? i : 0.0);
                    }


                    typedef agg::gradient_x gradient_func_type;
                    typedef agg::span_interpolator_linear<> interpolator_type;
                    typedef agg::span_allocator<color_type> span_allocator_type;
                    typedef agg::pod_auto_array<color_type, 256> color_array_type;
                    typedef agg::span_gradient<color_type, 
                                               interpolator_type, 
                                               gradient_func_type, 
                                               color_array_type> span_gradient_type;

                    typedef agg::renderer_scanline_aa<renderer_base_type, 
                                                      span_allocator_type,
                                                      span_gradient_type> renderer_gradient_type;

                    gradient_func_type  gradient_func;                   // The gradient function
                    agg::trans_affine   gradient_mtx;                    // Affine transformer
                    interpolator_type   span_interpolator(gradient_mtx); // Span interpolator
                    span_allocator_type span_allocator;                  // Span Allocator
                    color_array_type    gradient_colors;                 // The gradient colors
                    span_gradient_type  span_gradient(span_interpolator, 
                                                      gradient_func, 
                                                      gradient_colors, 
                                                      0, 100);

                    renderer_gradient_type ren_gradient(ren_base, span_allocator, span_gradient);

                    dashed_line<rasterizer_type, 
                                renderer_gradient_type, 
                                scanline_type> dash_gradient(ras, ren_gradient, sl);

                    double x1, y1, x2, y2;

                    for(i = 1; i <= 20; i++)
                    {
                        ren_sl.color(agg::rgba(1,1,1));

                        // integral point sizes 1..20
                        //----------------
                        agg::ellipse ell;
            
                        ell.init(20 + i * (i + 1) + 0.5, 
                                 20.5, 
                                 i / 2.0, 
                                 i / 2.0, 
                                 8 + i);
                        ras.reset();
                        ras.add_path(ell);
                        agg::render_scanlines(ras, sl, ren_sl);
            

                        // fractional point sizes 0..2
                        //----------------
                        ell.init(18 + i * 4 + 0.5, 33 + 0.5, 
                                 i/20.0, i/20.0, 
                                 8);
                        ras.reset();
                        ras.add_path(ell);
                        agg::render_scanlines(ras, sl, ren_sl);


                        // fractional point positioning
                        //---------------
                        ell.init(18 + i * 4 + (i-1) / 10.0 + 0.5, 
                                 27 + (i - 1) / 10.0 + 0.5, 
                                 0.5, 0.5, 8);
                        ras.reset();
                        ras.add_path(ell);
                        agg::render_scanlines(ras, sl, ren_sl);


                        // integral line widths 1..20
                        //----------------
                        fill_color_array(gradient_colors, 
                                         agg::rgba(1,1,1), 
                                         agg::rgba(i % 2, (i % 3) * 0.5, (i % 5) * 0.25));

                        x1 = 20 + i* (i + 1);
                        y1 = 40.5;
                        x2 = 20 + i * (i + 1) + (i - 1) * 4;
                        y2 = 100.5;
                        calc_linear_gradient_transform(x1, y1, x2, y2, gradient_mtx);
                        dash_gradient.draw(x1, y1, x2, y2, i, 0);


                        fill_color_array(gradient_colors, 
                                         agg::rgba(1,0,0), 
                                         agg::rgba(0,0,1));

                        // fractional line lengths H (red/blue)
                        //----------------
                        x1 = 17.5 + i * 4;
                        y1 = 107;
                        x2 = 17.5 + i * 4 + i/6.66666667;
                        y2 = 107;
                        calc_linear_gradient_transform(x1, y1, x2, y2, gradient_mtx);
                        dash_gradient.draw(x1, y1, x2, y2, 1.0, 0);


                        // fractional line lengths V (red/blue)
                        //---------------
                        x1 = 18 + i * 4;
                        y1 = 112.5;
                        x2 = 18 + i * 4;
                        y2 = 112.5 + i / 6.66666667;
                        calc_linear_gradient_transform(x1, y1, x2, y2, gradient_mtx);
                        dash_gradient.draw(x1, y1, x2, y2, 1.0, 0);

                        // fractional line positioning (red)
                        //---------------
                        fill_color_array(gradient_colors, 
                                         agg::rgba(1,0,0), 
                                         agg::rgba(1,1,1));
                        x1 = 21.5;
                        y1 = 120 + (i - 1) * 3.1;
                        x2 = 52.5;
                        y2 = 120 + (i - 1) * 3.1;
                        calc_linear_gradient_transform(x1, y1, x2, y2, gradient_mtx);
                        dash_gradient.draw(x1, y1, x2, y2, 1.0, 0);


                        // fractional line width 2..0 (green)
                        fill_color_array(gradient_colors, 
                                         agg::rgba(0,1,0), 
                                         agg::rgba(1,1,1));
                        x1 = 52.5;
                        y1 = 118 + i * 3;
                        x2 = 83.5;
                        y2 = 118 + i * 3;
                        calc_linear_gradient_transform(x1, y1, x2, y2, gradient_mtx);
                        dash_gradient.draw(x1, y1, x2, y2, 2.0 - (i - 1) / 10.0, 0);

                        // stippled fractional width 2..0 (blue)
                        fill_color_array(gradient_colors, 
                                         agg::rgba(0,0,1), 
                                         agg::rgba(1,1,1));
                        x1 = 83.5;
                        y1 = 119 + i * 3;
                        x2 = 114.5;
                        y2 = 119 + i * 3;
                        calc_linear_gradient_transform(x1, y1, x2, y2, gradient_mtx);
                        dash_gradient.draw(x1, y1, x2, y2, 2.0 - (i - 1) / 10.0, 3.0);


                        ren_sl.color(agg::rgba(1,1,1));
                        if(i <= 10)
                        {
                            // integral line width, horz aligned (mipmap test)
                            //-------------------
                            dash.draw(125.5, 119.5 + (i + 2) * (i / 2.0),
                                      135.5, 119.5 + (i + 2) * (i / 2.0),
                                      i, 0.0);
                        }

                        // fractional line width 0..2, 1 px H
                        //-----------------
                        dash.draw(17.5 + i * 4, 192, 18.5 + i * 4, 192, i / 10.0, 0);

                        // fractional line positioning, 1 px H
                        //-----------------
                        dash.draw(17.5 + i * 4 + (i - 1) / 10.0, 186, 
                                  18.5 + i * 4 + (i - 1) / 10.0, 186,
                                  1.0, 0);
                    }


                    // Triangles
                    //---------------
                    for (int i = 1; i <= 13; i++) 
                    {
                        fill_color_array(gradient_colors, 
                                         agg::rgba(1,1,1), 
                                         agg::rgba(i % 2, (i % 3) * 0.5, (i % 5) * 0.25));
                        calc_linear_gradient_transform(width()  - 150, 
                                                       height() - 20 - i * (i + 1.5),
                                                       width()  - 20,  
                                                       height() - 20 - i * (i + 1),
                                                       gradient_mtx);
                        ras.reset();
                        ras.move_to_d(width() - 150, height() - 20 - i * (i + 1.5));
                        ras.line_to_d(width() - 20,  height() - 20 - i * (i + 1));
                        ras.line_to_d(width() - 20,  height() - 20 - i * (i + 2));
                        agg::render_scanlines(ras, sl, ren_gradient);
                    }
             */










            base.OnDraw(renderer);
        }
Пример #4
0
        /*
            void draw_curve(Pattern patt, IRasterizer ras, Renderer ren, PatternSource src, IVertexSource vs)
            {
                patt.create(src);
                ren.scale_x(m_scale_x.value());
                ren.start_x(m_start_x.value());
                ras.add_path(vs);
            }
         */

        public override void  OnDraw()
        {
        #if SourceDepth24
                    FormatRGB pf = new FormatRGB(rbuf_window(), new BlenderBGR());
        #else
                    FormatRGBA pf = new FormatRGBA(rbuf_window(), new BlenderBGRA());
        #endif
                    FormatClippingProxy ren_base = new FormatClippingProxy(pf);

            ren_base.clear(new RGBA_Doubles(1.0, 1.0, .95));

            rasterizer_scanline_aa ras = new rasterizer_scanline_aa();
            scanline_packed_8 sl = new scanline_packed_8();

            // Pattern source. Must have an interface:
            // width() const
            // height() const
            // pixel(int x, int y) const
            // Any agg::renderer_base<> or derived
            // is good for the use as a source.
            //-----------------------------------
            pattern_src_brightness_to_alpha_RGBA_Bytes p1 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(0));
            pattern_src_brightness_to_alpha_RGBA_Bytes p2 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(1));
            pattern_src_brightness_to_alpha_RGBA_Bytes p3 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(2));
            pattern_src_brightness_to_alpha_RGBA_Bytes p4 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(3));
            pattern_src_brightness_to_alpha_RGBA_Bytes p5 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(4));
            pattern_src_brightness_to_alpha_RGBA_Bytes p6 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(5));
            pattern_src_brightness_to_alpha_RGBA_Bytes p7 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(6));
            pattern_src_brightness_to_alpha_RGBA_Bytes p8 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(7));
            pattern_src_brightness_to_alpha_RGBA_Bytes p9 = new pattern_src_brightness_to_alpha_RGBA_Bytes(rbuf_img(8));

            //pattern_filter_bilinear_rgba 
            pattern_filter_bilinear_RGBA_Bytes fltr;           // Filtering functor

            // agg::line_image_pattern is the main container for the patterns. It creates
            // a copy of the patterns extended according to the needs of the filter.
            // agg::line_image_pattern can operate with arbitrary image width, but if the 
            // width of the pattern is power of 2, it's better to use the modified
            // version agg::line_image_pattern_pow2 because it works about 15-25 percent
            // faster than agg::line_image_pattern (because of using simple masking instead 
            // of expensive '%' operation). 
            
            //typedef agg::line_image_pattern<agg::pattern_filter_bilinear_RGBA_Bytes> pattern_type;
            //typedef agg::renderer_base<pixfmt> base_ren_type;
            //typedef agg::renderer_outline_image<base_ren_type, pattern_type> renderer_type;
            //typedef agg::rasterizer_outline_aa<renderer_type>                rasterizer_type;

            //-- Create with specifying the source
            //pattern_type patt(fltr, src);   

            //-- Create uninitialized and set the source
            line_image_pattern patt = new line_image_pattern(new pattern_filter_bilinear_RGBA_Bytes());
            //renderer_outline_image ren_img = new renderer_outline_image(, patt);
            /*
            renderer_type ren_img(ren_base, patt);
            rasterizer_type ras_img(ren_img);

            draw_curve(patt, ras_img, ren_img, p1, m_curve1.curve());
            draw_curve(patt, ras_img, ren_img, p2, m_curve2.curve());
            draw_curve(patt, ras_img, ren_img, p3, m_curve3.curve());
            draw_curve(patt, ras_img, ren_img, p4, m_curve4.curve());
            draw_curve(patt, ras_img, ren_img, p5, m_curve5.curve());
            draw_curve(patt, ras_img, ren_img, p6, m_curve6.curve());
            draw_curve(patt, ras_img, ren_img, p7, m_curve7.curve());
            draw_curve(patt, ras_img, ren_img, p8, m_curve8.curve());
            draw_curve(patt, ras_img, ren_img, p9, m_curve9.curve());
             */
            base.OnDraw();
        }
Пример #5
0
        void DrawImage(IImage sourceImage,
            double DestX, double DestY,
            double HotspotOffsetX, double HotspotOffsetY,
            double ScaleX, double ScaleY,
            double AngleRad,
            RGBA_Bytes Color32,
            ref RectangleD pFinalBlitBounds,
            bool doDrawing,
            bool oneMinusSourceAlphaOne)
        {
            Affine destRectTransform = Affine.NewIdentity();

            if (HotspotOffsetX != 0.0f || HotspotOffsetY != 0.0f)
            {
                destRectTransform *= Affine.NewTranslation(-HotspotOffsetX, -HotspotOffsetY);
            }

            if (ScaleX != 1 || ScaleY != 1)
            {
                destRectTransform *= Affine.NewScaling(ScaleX, ScaleY);
            }

            if (AngleRad != 0)
            {
                destRectTransform *= Affine.NewRotation(AngleRad);
            }

            if (DestX != 0 || DestY != 0)
            {
                destRectTransform *= Affine.NewTranslation(DestX, DestY);
            }

            int SourceBufferWidth = (int)sourceImage.Width();
            int SourceBufferHeight = (int)sourceImage.Height();

            RectPath.Clear();

            RectPath.MoveTo(0, 0);
            RectPath.LineTo(SourceBufferWidth, 0);
            RectPath.LineTo(SourceBufferWidth, SourceBufferHeight);
            RectPath.LineTo(0, SourceBufferHeight);
            RectPath.ClosePolygon();


            // Calculate the bounds. LBB [10/5/2004]
            const int ERROR_ADD = 0;
            double BoundXDouble, BoundYDouble;
            BoundXDouble = 0; BoundYDouble = 0;
            destRectTransform.Transform(ref BoundXDouble, ref BoundYDouble);
            double BoundX = (double)BoundXDouble;
            double BoundY = (double)BoundYDouble;

            pFinalBlitBounds.Left = Math.Floor(BoundX - ERROR_ADD);
            pFinalBlitBounds.Right = Math.Ceiling(BoundX + ERROR_ADD);
            pFinalBlitBounds.Top = Math.Floor(BoundY - ERROR_ADD);
            pFinalBlitBounds.Bottom = Math.Ceiling(BoundY + ERROR_ADD);

            BoundXDouble = SourceBufferWidth; BoundYDouble = 0;
            destRectTransform.Transform(ref BoundXDouble, ref BoundYDouble);
            BoundX = (double)BoundXDouble;
            BoundY = (double)BoundYDouble;
            pFinalBlitBounds.Left = Math.Min((long)Math.Floor(BoundX - ERROR_ADD), pFinalBlitBounds.Left);
            pFinalBlitBounds.Right = Math.Max((long)Math.Ceiling(BoundX + ERROR_ADD), pFinalBlitBounds.Right);
            pFinalBlitBounds.Top = Math.Min((long)Math.Floor(BoundY - ERROR_ADD), pFinalBlitBounds.Top);
            pFinalBlitBounds.Bottom = Math.Max((long)Math.Ceiling(BoundY + ERROR_ADD), pFinalBlitBounds.Bottom);

            BoundXDouble = SourceBufferWidth; BoundYDouble = SourceBufferHeight;
            destRectTransform.Transform(ref BoundXDouble, ref BoundYDouble);
            BoundX = (double)BoundXDouble;
            BoundY = (double)BoundYDouble;
            pFinalBlitBounds.Left = Math.Min((long)Math.Floor(BoundX - ERROR_ADD), pFinalBlitBounds.Left);
            pFinalBlitBounds.Right = Math.Max((long)Math.Ceiling(BoundX + ERROR_ADD), pFinalBlitBounds.Right);
            pFinalBlitBounds.Top = Math.Min((long)Math.Floor(BoundY - ERROR_ADD), pFinalBlitBounds.Top);
            pFinalBlitBounds.Bottom = Math.Max((long)Math.Ceiling(BoundY + ERROR_ADD), pFinalBlitBounds.Bottom);

            BoundXDouble = 0; BoundYDouble = SourceBufferHeight;
            destRectTransform.Transform(ref BoundXDouble, ref BoundYDouble);
            BoundX = (double)BoundXDouble;
            BoundY = (double)BoundYDouble;
            pFinalBlitBounds.Left = Math.Min((long)Math.Floor(BoundX - ERROR_ADD), pFinalBlitBounds.Left);
            pFinalBlitBounds.Right = Math.Max((long)Math.Ceiling(BoundX + ERROR_ADD), pFinalBlitBounds.Right);
            pFinalBlitBounds.Top = Math.Min((long)Math.Floor(BoundY - ERROR_ADD), pFinalBlitBounds.Top);
            pFinalBlitBounds.Bottom = Math.Max((long)Math.Ceiling(BoundY + ERROR_ADD), pFinalBlitBounds.Bottom);

            if (!doDrawing)
            {
                return;
            }

            if (m_DestImage.OriginOffset.x != 0 || m_DestImage.OriginOffset.y != 0)
            {
                destRectTransform *= Affine.NewTranslation(-m_DestImage.OriginOffset.x, -m_DestImage.OriginOffset.y);
            }

            Affine sourceRectTransform = new Affine(destRectTransform);
            // We invert it because it is the transform to make the image go to the same position as the polygon. LBB [2/24/2004]
            sourceRectTransform.Invert();

            span_allocator spanAllocator = new span_allocator();

            span_interpolator_linear interpolator = new span_interpolator_linear(sourceRectTransform);

            ImageBuffer sourceImageWithBlender = (ImageBuffer)sourceImage;// new ImageBuffer(sourceImage, new BlenderBGRA());

            span_image_filter_rgba_bilinear_clip spanImageFilter;
            ImageBufferAccessorClip source = new ImageBufferAccessorClip(sourceImageWithBlender, RGBA_Doubles.rgba_pre(0, 0, 0, 0).GetAsRGBA_Bytes());
            spanImageFilter = new span_image_filter_rgba_bilinear_clip(source, RGBA_Doubles.rgba_pre(0, 0, 0, 0), interpolator);

            rasterizer_scanline_aa rasterizer = new rasterizer_scanline_aa();
            rasterizer.SetVectorClipBox(0, 0, m_DestImage.Width(), m_DestImage.Height());
            scanline_packed_8 scanlineCache = new scanline_packed_8();
            //scanline_unpacked_8 scanlineCache = new scanline_unpacked_8();

            conv_transform transfromedRect = new conv_transform(RectPath, destRectTransform);
            rasterizer.add_path(transfromedRect);
#if false
	        bool HighQualityFilter = (BlitXParams.m_OptionalFlags & CBlitXParams::BlitHighQualityFilter) != 0
		        && (BlitXParams.m_OptionalFlags & CBlitXParams::RenderOneMinusScrAlpha_One) == 0;
	        if (HighQualityFilter)
	        {