368 lines
15 KiB
C#
368 lines
15 KiB
C#
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#region MigraDoc - Creating Documents on the Fly
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//
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// Authors:
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// Klaus Potzesny
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//
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// Copyright (c) 2001-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://www.migradoc.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.IO;
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using System.Diagnostics;
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using PdfSharp.Drawing;
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using MigraDoc.DocumentObjectModel.Shapes;
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using MigraDoc.Rendering.Resources;
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namespace MigraDoc.Rendering
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{
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/// <summary>
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/// Renders images.
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/// </summary>
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public class ImageRenderer : ShapeRenderer
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{
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public ImageRenderer(XGraphics gfx, Image image, FieldInfos fieldInfos)
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: base(gfx, image, fieldInfos)
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{
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_image = image;
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ImageRenderInfo renderInfo = new ImageRenderInfo();
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renderInfo.DocumentObject = _shape;
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_renderInfo = renderInfo;
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}
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public ImageRenderer(XGraphics gfx, RenderInfo renderInfo, FieldInfos fieldInfos)
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: base(gfx, renderInfo, fieldInfos)
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{
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_image = (Image)renderInfo.DocumentObject;
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}
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public override void Format(Area area, FormatInfo previousFormatInfo)
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{
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_imageFilePath = _image.GetFilePath(_documentRenderer.WorkingDirectory);
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// The Image is stored in the string if path starts with "base64:", otherwise we check whether the file exists.
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if (!_imageFilePath.StartsWith("base64:") &&
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!XImage.ExistsFile(_imageFilePath))
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{
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_failure = ImageFailure.FileNotFound;
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Debug.WriteLine(Messages2.ImageNotFound(_image.Name), "warning");
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}
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ImageFormatInfo formatInfo = (ImageFormatInfo)_renderInfo.FormatInfo;
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formatInfo.Failure = _failure;
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formatInfo.ImagePath = _imageFilePath;
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CalculateImageDimensions();
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base.Format(area, previousFormatInfo);
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}
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protected override XUnit ShapeHeight
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{
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get
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{
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ImageFormatInfo formatInfo = (ImageFormatInfo)_renderInfo.FormatInfo;
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return formatInfo.Height + _lineFormatRenderer.GetWidth();
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}
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}
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protected override XUnit ShapeWidth
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{
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get
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{
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ImageFormatInfo formatInfo = (ImageFormatInfo)_renderInfo.FormatInfo;
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return formatInfo.Width + _lineFormatRenderer.GetWidth();
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}
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}
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public override void Render()
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{
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RenderFilling();
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ImageFormatInfo formatInfo = (ImageFormatInfo)_renderInfo.FormatInfo;
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Area contentArea = _renderInfo.LayoutInfo.ContentArea;
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XRect destRect = new XRect(contentArea.X, contentArea.Y, formatInfo.Width, formatInfo.Height);
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if (formatInfo.Failure == ImageFailure.None)
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{
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XImage xImage = null;
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try
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{
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XRect srcRect = new XRect(formatInfo.CropX, formatInfo.CropY, formatInfo.CropWidth, formatInfo.CropHeight);
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//xImage = XImage.FromFile(formatInfo.ImagePath);
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xImage = CreateXImage(formatInfo.ImagePath);
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_gfx.DrawImage(xImage, destRect, srcRect, XGraphicsUnit.Point); //Pixel.
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}
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catch (Exception)
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{
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RenderFailureImage(destRect);
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}
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finally
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{
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if (xImage != null)
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xImage.Dispose();
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}
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}
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else
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RenderFailureImage(destRect);
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RenderLine();
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}
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void RenderFailureImage(XRect destRect)
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{
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_gfx.DrawRectangle(XBrushes.LightGray, destRect);
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string failureString;
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ImageFormatInfo formatInfo = (ImageFormatInfo)RenderInfo.FormatInfo;
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switch (formatInfo.Failure)
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{
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case ImageFailure.EmptySize:
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failureString = Messages2.DisplayEmptyImageSize;
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break;
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case ImageFailure.FileNotFound:
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failureString = Messages2.DisplayImageFileNotFound;
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break;
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case ImageFailure.InvalidType:
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failureString = Messages2.DisplayInvalidImageType;
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break;
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case ImageFailure.NotRead:
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default:
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failureString = Messages2.DisplayImageNotRead;
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break;
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}
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// Create stub font
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XFont font = new XFont("Courier New", 8);
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_gfx.DrawString(failureString, font, XBrushes.Red, destRect, XStringFormats.Center);
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}
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private void CalculateImageDimensions()
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{
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ImageFormatInfo formatInfo = (ImageFormatInfo)_renderInfo.FormatInfo;
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if (formatInfo.Failure == ImageFailure.None)
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{
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XImage xImage = null;
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try
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{
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//xImage = XImage.FromFile(_imageFilePath);
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xImage = CreateXImage(_imageFilePath);
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}
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catch (InvalidOperationException ex)
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{
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Debug.WriteLine(Messages2.InvalidImageType(ex.Message));
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formatInfo.Failure = ImageFailure.InvalidType;
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}
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if (formatInfo.Failure == ImageFailure.None)
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{
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try
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{
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XUnit usrWidth = _image.Width.Point;
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XUnit usrHeight = _image.Height.Point;
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bool usrWidthSet = !_image._width.IsNull;
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bool usrHeightSet = !_image._height.IsNull;
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XUnit resultWidth = usrWidth;
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XUnit resultHeight = usrHeight;
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Debug.Assert(xImage != null);
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double xPixels = xImage.PixelWidth;
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bool usrResolutionSet = !_image._resolution.IsNull;
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double horzRes = usrResolutionSet ? _image.Resolution : xImage.HorizontalResolution;
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double vertRes = usrResolutionSet ? _image.Resolution : xImage.VerticalResolution;
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// ReSharper disable CompareOfFloatsByEqualityOperator
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if (horzRes == 0 && vertRes == 0)
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{
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horzRes = 72;
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vertRes = 72;
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}
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else if (horzRes == 0)
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{
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Debug.Assert(false, "How can this be?");
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horzRes = 72;
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}
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else if (vertRes == 0)
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{
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Debug.Assert(false, "How can this be?");
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vertRes = 72;
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}
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// ReSharper restore CompareOfFloatsByEqualityOperator
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XUnit inherentWidth = XUnit.FromInch(xPixels / horzRes);
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double yPixels = xImage.PixelHeight;
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XUnit inherentHeight = XUnit.FromInch(yPixels / vertRes);
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//bool lockRatio = _image.IsNull("LockAspectRatio") ? true : _image.LockAspectRatio;
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bool lockRatio = _image._lockAspectRatio.IsNull || _image.LockAspectRatio;
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double scaleHeight = _image.ScaleHeight;
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double scaleWidth = _image.ScaleWidth;
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//bool scaleHeightSet = !_image.IsNull("ScaleHeight");
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//bool scaleWidthSet = !_image.IsNull("ScaleWidth");
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bool scaleHeightSet = !_image._scaleHeight.IsNull;
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bool scaleWidthSet = !_image._scaleWidth.IsNull;
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if (lockRatio && !(scaleHeightSet && scaleWidthSet))
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{
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if (usrWidthSet && !usrHeightSet)
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{
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resultHeight = inherentHeight / inherentWidth * usrWidth;
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}
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else if (usrHeightSet && !usrWidthSet)
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{
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resultWidth = inherentWidth / inherentHeight * usrHeight;
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}
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// ReSharper disable once ConditionIsAlwaysTrueOrFalse
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else if (!usrHeightSet && !usrWidthSet)
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{
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resultHeight = inherentHeight;
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resultWidth = inherentWidth;
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}
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if (scaleHeightSet)
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{
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resultHeight = resultHeight * scaleHeight;
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resultWidth = resultWidth * scaleHeight;
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}
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if (scaleWidthSet)
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{
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resultHeight = resultHeight * scaleWidth;
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resultWidth = resultWidth * scaleWidth;
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}
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}
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else
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{
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if (!usrHeightSet)
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resultHeight = inherentHeight;
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if (!usrWidthSet)
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resultWidth = inherentWidth;
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if (scaleHeightSet)
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resultHeight = resultHeight * scaleHeight;
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if (scaleWidthSet)
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resultWidth = resultWidth * scaleWidth;
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}
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formatInfo.CropWidth = (int)xPixels;
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formatInfo.CropHeight = (int)yPixels;
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if (_image._pictureFormat != null && !_image._pictureFormat.IsNull())
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{
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PictureFormat picFormat = _image.PictureFormat;
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//Cropping in pixels.
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XUnit cropLeft = picFormat.CropLeft.Point;
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XUnit cropRight = picFormat.CropRight.Point;
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XUnit cropTop = picFormat.CropTop.Point;
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XUnit cropBottom = picFormat.CropBottom.Point;
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formatInfo.CropX = (int)(horzRes * cropLeft.Inch);
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formatInfo.CropY = (int)(vertRes * cropTop.Inch);
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formatInfo.CropWidth -= (int)(horzRes * ((XUnit)(cropLeft + cropRight)).Inch);
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formatInfo.CropHeight -= (int)(vertRes * ((XUnit)(cropTop + cropBottom)).Inch);
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//Scaled cropping of the height and width.
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double xScale = resultWidth / inherentWidth;
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double yScale = resultHeight / inherentHeight;
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cropLeft = xScale * cropLeft;
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cropRight = xScale * cropRight;
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cropTop = yScale * cropTop;
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cropBottom = yScale * cropBottom;
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resultHeight = resultHeight - cropTop - cropBottom;
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resultWidth = resultWidth - cropLeft - cropRight;
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}
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if (resultHeight <= 0 || resultWidth <= 0)
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{
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formatInfo.Width = XUnit.FromCentimeter(2.5);
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formatInfo.Height = XUnit.FromCentimeter(2.5);
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Debug.WriteLine(Messages2.EmptyImageSize);
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_failure = ImageFailure.EmptySize;
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}
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else
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{
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formatInfo.Width = resultWidth;
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formatInfo.Height = resultHeight;
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}
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}
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catch (Exception ex)
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{
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Debug.WriteLine(Messages2.ImageNotReadable(_image.Name, ex.Message));
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formatInfo.Failure = ImageFailure.NotRead;
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}
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finally
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{
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if (xImage != null)
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xImage.Dispose();
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}
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}
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}
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if (formatInfo.Failure != ImageFailure.None)
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{
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if (!_image._width.IsNull)
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formatInfo.Width = _image.Width.Point;
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else
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formatInfo.Width = XUnit.FromCentimeter(2.5);
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if (!_image._height.IsNull)
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formatInfo.Height = _image.Height.Point;
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else
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formatInfo.Height = XUnit.FromCentimeter(2.5);
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}
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}
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XImage CreateXImage(string uri)
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{
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if (uri.StartsWith("base64:"))
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{
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string base64 = uri.Substring("base64:".Length);
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byte[] bytes = Convert.FromBase64String(base64);
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#if WPF || CORE_WITH_GDI || GDI
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// WPF stores a reference to the stream publicly. We must not destroy the stream here, otherwise rendering the PDF will fail.
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// Same for GDI. CORE currently uses the GDI implementation.
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// We have to rely on the garbage collector to properly dispose the MemoryStream.
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{
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Stream stream = new MemoryStream(bytes);
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XImage image = XImage.FromStream(stream);
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return image;
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}
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#else
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using (Stream stream = new MemoryStream(bytes))
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{
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XImage image = XImage.FromStream(stream);
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return image;
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}
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#endif
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}
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return XImage.FromFile(uri);
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}
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readonly Image _image;
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string _imageFilePath;
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ImageFailure _failure;
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}
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}
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