コード例 #1
0
        /// <summary>
        /// Draw the background image at the required location repeating it over the Y axis.<br/>
        /// Adjust location to top if starting location doesn't include all the range (adjusted to center or bottom).
        /// </summary>
        private static void DrawRepeatY(RGraphics g, ImageLoadHandler imageLoadHandler, RRect rectangle, RRect srcRect, RRect destRect, RSize imgSize)
        {
            while (destRect.Y > rectangle.Y)
            {
                destRect.Y -= imgSize.Height;
            }

            using (var brush = g.GetTextureBrush(imageLoadHandler.Image, srcRect, destRect.Location))
            {
                g.DrawRectangle(brush, destRect.X, rectangle.Y, srcRect.Width, rectangle.Height);
            }
        }
コード例 #2
0
        /// <summary>
        /// Draw the background image of the given box in the given rectangle.<br/>
        /// Handle background-repeat and background-position values.
        /// </summary>
        /// <param name="g">the device to draw into</param>
        /// <param name="box">the box to draw its background image</param>
        /// <param name="imageLoadHandler">the handler that loads image to draw</param>
        /// <param name="rectangle">the rectangle to draw image in</param>
        public static void DrawBackgroundImage(RGraphics g, CssBox box, ImageLoadHandler imageLoadHandler, RRect rectangle)
        {
            // image size depends if specific rectangle given in image loader
            var imgSize = new RSize(imageLoadHandler.Rectangle == RRect.Empty ? imageLoadHandler.Image.Width : imageLoadHandler.Rectangle.Width,
                                    imageLoadHandler.Rectangle == RRect.Empty ? imageLoadHandler.Image.Height : imageLoadHandler.Rectangle.Height);

            // get the location by BackgroundPosition value
            var location = GetLocation(box.BackgroundPosition, rectangle, imgSize);

            var srcRect = imageLoadHandler.Rectangle == RRect.Empty
                ? new RRect(0, 0, imgSize.Width, imgSize.Height)
                : new RRect(imageLoadHandler.Rectangle.Left, imageLoadHandler.Rectangle.Top, imgSize.Width, imgSize.Height);

            // initial image destination rectangle
            var destRect = new RRect(location, imgSize);

            // need to clip so repeated image will be cut on rectangle
            var lRectangle = rectangle;

            lRectangle.Intersect(g.GetClip());
            g.PushClip(lRectangle);

            switch (box.BackgroundRepeat)
            {
            case "no-repeat":
                g.DrawImage(imageLoadHandler.Image, destRect, srcRect);
                break;

            case "repeat-x":
                DrawRepeatX(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
                break;

            case "repeat-y":
                DrawRepeatY(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
                break;

            default:
                DrawRepeat(g, imageLoadHandler, rectangle, srcRect, destRect, imgSize);
                break;
            }

            g.PopClip();
        }