예제 #1
0
        /// <summary>
        /// When a GDI instruction with a brush parameter is called, there can be a lot we have to do to emulate the brush.  The aim is to return a 
        /// style that represents the brush.
        /// <para>
        /// Solid brush is very easy.
        /// </para>
        /// <para>
        /// Linear grad brush:  we ignore the blend curve and the transformation (and therefore the rotation parameter if any)
        /// Hatch brush: 
        /// </para>
        /// <para>
        /// Other types of brushes are too hard to emulate and are rendered pink.
        /// </para>
        /// </summary>
        /// <param name="br"></param>
        /// <returns></returns>
        private SvgStyle HandleBrush(Brush br)
        {
            if (br.GetType() == typeof(SolidBrush))
            {
                return new SvgStyle((SolidBrush)br);
            }

            if (br.GetType() == typeof(LinearGradientBrush))
            {
                LinearGradientBrush grbr = (LinearGradientBrush)br;
                RectangleF rc = grbr.Rectangle;

                SvgLinearGradient grad = new SvgLinearGradient(rc.Left, rc.Top, rc.Right, rc.Bottom);

                switch(grbr.WrapMode)
                {
                        //I have not been able to test Clamp because using a clamped gradient appears to crash the process
                        //under XP (?!?!)
                    case WrapMode.Clamp:
                        grad.SpreadMethod = "pad"; grad.GradientUnits = "objectBoundingBox"; break;
                    case WrapMode.Tile:
                        grad.SpreadMethod = "repeat"; grad.GradientUnits = "userSpaceOnUse"; break;
                    default:
                        grad.SpreadMethod = "reflect"; grad.GradientUnits = "userSpaceOnUse"; break;
                }

                ColorBlend cb = null;

                //GDI dll tends to crash when you try and access some members of gradient brushes that haven't been specified.
                try
                {
                    cb = grbr.InterpolationColors;
                }
                catch(Exception){}

                if(cb != null)
                {
                    for(int i = 0; i < grbr.InterpolationColors.Colors.Length; ++i)
                    {
                        grad.AddChild(new SvgStopElement(grbr.InterpolationColors.Positions[i], grbr.InterpolationColors.Colors[i]));
                    }
                }
                else
                {
                    grad.AddChild(new SvgStopElement("0%", grbr.LinearColors[0]));
                    grad.AddChild(new SvgStopElement("100%", grbr.LinearColors[1]));
                }

                grad.Id += "_LinearGradientBrush";

                _defs.AddChild(grad);

                SvgStyle s = new SvgStyle();
                s.Set("fill", new SvgUriReference(grad));
                return s;
            }

            if (br.GetType() == typeof(HatchBrush))
            {
                HatchBrush habr = (HatchBrush)br;

                SvgPatternElement patty = new SvgPatternElement(0,0,8,8, new SvgNumList("4 4 12 12"));
                patty.Style.Set("shape-rendering", "crispEdges");
                patty.Style.Set("stroke-linecap", "butt");

                SvgRectElement rc = new SvgRectElement(0,0,8,8);
                rc.Style.Set("fill", new SvgColor(habr.BackgroundColor));
                patty.AddChild(rc);

                AddHatchBrushDetails(patty, new SvgColor(habr.ForegroundColor), habr.HatchStyle);

                patty.Id += "_HatchBrush";
                patty.PatternUnits = "userSpaceOnUse";
                patty.PatternContentUnits = "userSpaceOnUse";
                _defs.AddChild(patty);

                SvgStyle s = new SvgStyle();
                s.Set("fill", new SvgUriReference(patty));
                return s;
            }

            //most types of brush we can't emulate, but luckily they are quite unusual
            return new SvgStyle(new SolidBrush(Color.Salmon));
        }
예제 #2
0
        private void AddHatchBrushDetails(SvgPatternElement patty, SvgColor col, HatchStyle hs)
        {
            SvgStyledTransformedElement l1=null;
            SvgStyledTransformedElement l2 = null;
            SvgStyledTransformedElement l3 = null;
            SvgStyledTransformedElement l4 = null;

            switch(hs)
            {
                case HatchStyle.Cross:
                    l1 = new SvgLineElement(4,0,4,8);
                    l2 = new SvgLineElement(0,4,8,4);
                    break;

                case HatchStyle.BackwardDiagonal:
                    l1 = new SvgLineElement(8,0,0,8);
                    break;

                case HatchStyle.LightDownwardDiagonal:
                case HatchStyle.DarkDownwardDiagonal:
                    l1 = new SvgLineElement(4,0,8,4);
                    l2 = new SvgLineElement(0,4,4,8);
                    l3 = new SvgLineElement(0,0,8,8);
                    break;
                case HatchStyle.LightHorizontal:
                case HatchStyle.DarkHorizontal:
                    l1 = new SvgLineElement(0,2,8,2);
                    l2 = new SvgLineElement(0,6,8,6);
                    break;
                case HatchStyle.LightUpwardDiagonal:
                case HatchStyle.DarkUpwardDiagonal:
                    l1 = new SvgLineElement(0,4,4,0);
                    l2 = new SvgLineElement(4,8,8,4);
                    l3 = new SvgLineElement(0,8,8,0);
                    break;
                case HatchStyle.LightVertical:
                case HatchStyle.DarkVertical:
                    l1 = new SvgLineElement(2,0,2,8);
                    l2 = new SvgLineElement(6,0,6,8);
                    break;
                case HatchStyle.DashedDownwardDiagonal:
                    l1 = new SvgLineElement(0,0,4,4);
                    l2 = new SvgLineElement(4,0,8,4);
                    break;
                case HatchStyle.DashedHorizontal:
                    l1 = new SvgLineElement(0,2,4,2);
                    l2 = new SvgLineElement(4,6,8,6);
                    break;
                case HatchStyle.DashedUpwardDiagonal:
                    l1 = new SvgLineElement(4,0,0,4);
                    l2 = new SvgLineElement(8,0,4,4);
                    break;
                case HatchStyle.DashedVertical:
                    l1 = new SvgLineElement(2,0,2,4);
                    l2 = new SvgLineElement(6,4,6,8);
                    break;
                case HatchStyle.DiagonalBrick:
                    l1 = new SvgLineElement(0,8,8,0);
                    l2 = new SvgLineElement(0,0,4,4);
                    break;
                case HatchStyle.DiagonalCross:
                    l1 = new SvgLineElement(0,0,8,8);
                    l2 = new SvgLineElement(8,0,0,8);
                    break;
                case HatchStyle.Divot:
                    l1 = new SvgLineElement(2,2,4,4);
                    l2 = new SvgLineElement(4,4,2,6);
                    break;
                case HatchStyle.DottedDiamond:
                    l1 = new SvgLineElement(0,0,8,8);
                    l2 = new SvgLineElement(0,8,8,0);
                    break;
                case HatchStyle.DottedGrid:
                    l1 = new SvgLineElement(4,0,4,8);
                    l2 = new SvgLineElement(0,4,8,4);
                    break;
                case HatchStyle.ForwardDiagonal:
                    l1 = new SvgLineElement(0,0,8,8);
                    break;
                case HatchStyle.Horizontal:
                    l1 = new SvgLineElement(0,4,8,4);
                    break;
                case HatchStyle.HorizontalBrick:
                    l1 = new SvgLineElement(0,3,8,3);
                    l2 = new SvgLineElement(3,0,3,3);
                    l3 = new SvgLineElement(0,3,0,7);
                    l4 = new SvgLineElement(0,7,7,7);
                    break;
                case HatchStyle.LargeCheckerBoard:
                    l1 = new SvgRectElement(0,0,3f,3f);
                    l2 = new SvgRectElement(4,4,4,4f);
                    break;
                case HatchStyle.LargeConfetti:
                    l1 = new SvgRectElement(0,0,1,1);
                    l2 = new SvgRectElement(2,3,1,1);
                    l3 = new SvgRectElement(5,2,1,1);
                    l4 = new SvgRectElement(6,6,1,1);
                    break;
                case HatchStyle.NarrowHorizontal:
                    l1 = new SvgLineElement(0,1,8,1);
                    l2 = new SvgLineElement(0,3,8,3);
                    l3 = new SvgLineElement(0,5,8,5);
                    l4 = new SvgLineElement(0,7,8,7);
                    break;
                case HatchStyle.NarrowVertical:
                    l1 = new SvgLineElement(1,0,1,8);
                    l2 = new SvgLineElement(3,0,3,8);
                    l3 = new SvgLineElement(5,0,5,8);
                    l4 = new SvgLineElement(7,0,7,8);
                    break;
                case HatchStyle.OutlinedDiamond:
                    l1 = new SvgLineElement(0,0,8,8);
                    l2 = new SvgLineElement(8,0,0,8);
                    break;
                case HatchStyle.Plaid:
                    l1 = new SvgLineElement(0,0,8,0);
                    l2 = new SvgLineElement(0,3,8,3);
                    l3 = new SvgRectElement(0,4,3,3);
                    break;
                case HatchStyle.Shingle:
                    l1 = new SvgLineElement(0,2,2,0);
                    l2 = new SvgLineElement(2,0,7,5);
                    l3 = new SvgLineElement(0,3,3,7);
                    break;
                case HatchStyle.SmallCheckerBoard:
                    l1 = new SvgRectElement(0,0,1,1);
                    l2 = new SvgRectElement(4,4,1,1);
                    l3 = new SvgRectElement(4,0,1,1);
                    l4 = new SvgRectElement(0,4,1,1);
                    break;
                case HatchStyle.SmallConfetti:
                    l1 = new SvgLineElement(0,0,2,2);
                    l2 = new SvgLineElement(7,3,5,5);
                    l3 = new SvgLineElement(2,6,4,4);
                    break;
                case HatchStyle.SmallGrid:
                    l1 = new SvgLineElement(0,2,8,2);
                    l2 = new SvgLineElement(0,6,8,6);
                    l3 = new SvgLineElement(2,0,2,8);
                    l4 = new SvgLineElement(6,0,6,8);
                    break;
                case HatchStyle.SolidDiamond:
                    l1 = new SvgPolygonElement("3 0 6 3 3 6 0 3");
                    break;
                case HatchStyle.Sphere:
                    l1 = new SvgEllipseElement(3,3,2,2);
                    break;
                case HatchStyle.Trellis:
                    l1 = new SvgLineElement(0,1,8,1);
                    l2 = new SvgLineElement(0,3,8,3);
                    l3 = new SvgLineElement(0,5,8,5);
                    l4 = new SvgLineElement(0,7,8,7);
                    break;
                case HatchStyle.Vertical:
                    l4 = new SvgLineElement(0,0,0,8);
                    break;
                case HatchStyle.Wave:
                    l3 = new SvgLineElement(0,4,3,2);
                    l4 = new SvgLineElement(3,2,8,4);
                    break;
                case HatchStyle.Weave:
                    l1 = new SvgLineElement(0,4,4,0);
                    l2 = new SvgLineElement(8,4,4,8);
                    l3 = new SvgLineElement(0,0,0,4);
                    l4 = new SvgLineElement(0,4,4,8);
                    break;
                case HatchStyle.WideDownwardDiagonal:
                    l1 = new SvgLineElement(0,0,8,8);
                    l2 = new SvgLineElement(0,1,8,9);
                    l3 = new SvgLineElement(7,0,8,1);
                    break;
                case HatchStyle.WideUpwardDiagonal:
                    l1 = new SvgLineElement(8,0,0,8);
                    l2 = new SvgLineElement(8,1,0,9);
                    l3 = new SvgLineElement(0,1,-1,0);
                    break;
                case HatchStyle.ZigZag:
                    l1 = new SvgLineElement(0,4,4,0);
                    l2 = new SvgLineElement(4,0,8,4);
                    break;

                case HatchStyle.Percent05:
                    l1 = new SvgLineElement(0,0,1,0);
                    l2 = new SvgLineElement(4,4,5,4);
                    break;
                case HatchStyle.Percent10:
                    l1 = new SvgLineElement(0,0,1,0);
                    l2 = new SvgLineElement(4,2,5,2);
                    l3 = new SvgLineElement(2,4,3,4);
                    l4 = new SvgLineElement(6,6,7,6);
                    break;
                case HatchStyle.Percent20:
                    l1 = new SvgLineElement(0,0,2,0);
                    l2 = new SvgLineElement(4,2,6,2);
                    l3 = new SvgLineElement(2,4,4,4);
                    l4 = new SvgLineElement(5,6,7,6);
                    break;
                case HatchStyle.Percent25:
                    l1 = new SvgLineElement(0,0,3,0);
                    l2 = new SvgLineElement(4,2,6,2);
                    l3 = new SvgLineElement(2,4,5,4);
                    l4 = new SvgLineElement(5,6,7,6);
                    break;
                case HatchStyle.Percent30:
                    l1 = new SvgRectElement(0,0,3,1);
                    l2 = new SvgLineElement(4,2,6,2);
                    l3 = new SvgRectElement(2,4,3,1);
                    l4 = new SvgLineElement(5,6,7,6);
                    break;
                case HatchStyle.Percent40:
                    l1 = new SvgRectElement(0,0,3,1);
                    l2 = new SvgRectElement(4,2,3,1);
                    l3 = new SvgRectElement(2,4,3,1);
                    l4 = new SvgRectElement(5,6,3,1);
                    break;
                case HatchStyle.Percent50:
                    l1 = new SvgRectElement(0,0,3,3);
                    l2 = new SvgRectElement(4,4,4,4f);
                    break;
                case HatchStyle.Percent60:
                    l1 = new SvgRectElement(0,0,4,3);
                    l2 = new SvgRectElement(4,4,4,4f);
                    break;
                case HatchStyle.Percent70:
                    l1 = new SvgRectElement(0,0,4,5);
                    l2 = new SvgRectElement(4,4,4,4f);
                    break;
                case HatchStyle.Percent75:
                    l1 = new SvgRectElement(0,0,7,3);
                    l2 = new SvgRectElement(0,2,3,7);
                    break;
                case HatchStyle.Percent80:
                    l1 = new SvgRectElement(0,0,7,4);
                    l2 = new SvgRectElement(0,2,4,7);
                    break;
                case HatchStyle.Percent90:
                    l1 = new SvgRectElement(0,0,7,5);
                    l2 = new SvgRectElement(0,2,5,7);
                    break;

                default:

                    break;
            }

            if (l1 != null)
            {
                l1.Style.Set("stroke", col);
                l1.Style.Set("fill", col);
                patty.AddChild(l1);
            }
            if (l2 != null)
            {
                l2.Style.Set("stroke", col);
                l2.Style.Set("fill", col);
                patty.AddChild(l2);
            }
            if (l3 != null)
            {
                l3.Style.Set("stroke", col);
                l3.Style.Set("fill", col);
                patty.AddChild(l3);
            }
            if (l4 != null)
            {
                l4.Style.Set("stroke", col);
                l4.Style.Set("fill", col);
                patty.AddChild(l4);
            }
        }