347

# image opacity fix

Samples/SVGViewer/DebugRenderer.cs

@@ -37,6 +37,12 @@ namespace SVGViewer
         {
             
         }
+
+        public void DrawImage(Image image, RectangleF destRect, RectangleF srcRect, GraphicsUnit graphicsUnit, float opacity)
+        {
+
+        }
+
         public void DrawImageUnscaled(Image image, Point location)
         {
             
@@ -94,7 +100,6 @@ namespace SVGViewer
         }        
 
 
-
         public SmoothingMode SmoothingMode
         {
             get { return SmoothingMode.Default; }

Source/Basic Shapes/SvgImage.cs

@@ -209,7 +209,10 @@ namespace Svg
 
                     if (bmp != null)
                     {
+                        if(Opacity==1F)
                             renderer.DrawImage(bmp, destRect, srcRect, GraphicsUnit.Pixel);
+                        else
+                            renderer.DrawImage(bmp, destRect, srcRect, GraphicsUnit.Pixel, Opacity);
                         bmp.Dispose();
                     }
                     else if (svg != null)

Source/Rendering/ISvgRenderer.cs

@@ -22,5 +22,6 @@ namespace Svg
         SmoothingMode SmoothingMode { get; set; }
         Matrix Transform { get; set; }
         void TranslateTransform(float dx, float dy, MatrixOrder order = MatrixOrder.Append);
+        void DrawImage(Image image, RectangleF destRect, RectangleF srcRect, GraphicsUnit graphicsUnit, float opacity);
     }
 }

Source/Rendering/SvgRenderer.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Drawing;
 using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
 using System.Drawing.Text;
 
 namespace Svg
@@ -46,6 +47,21 @@ namespace Svg
         {
             _innerGraphics.DrawImage(image, destRect, srcRect, graphicsUnit);
         }
+
+        public void DrawImage(Image image, RectangleF destRect, RectangleF srcRect, GraphicsUnit graphicsUnit, float opacity)
+        {
+            var matrix = new ColorMatrix {Matrix33 = opacity};
+            var attributes = new ImageAttributes();
+            attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
+            var points = new[]
+            {
+                destRect.Location,
+                new PointF(destRect.X + destRect.Width, destRect.Y),
+                new PointF(destRect.X, destRect.Y + destRect.Height)
+            };
+            _innerGraphics.DrawImage(image, points, srcRect, graphicsUnit, attributes);
+        }
+
         public void DrawImageUnscaled(Image image, Point location)
         {
             this._innerGraphics.DrawImageUnscaled(image, location);