public static void PreViewPage(object sender, PrintPageEventArgs e, PdfiumViewer.PdfDocument pdfDocument, ref int?pages)
{
PageSettings settings = e.PageSettings;
var paperHeight = settings.PaperSize.Height;
var paperWidth = settings.PaperSize.Width;
int margin = 10;
var imgHeight = 0;
var imgWidth = 0;
//int? pages = 0;
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
if ((double)image.Width / (double)image.Height > (double)paperWidth / (double)paperHeight) // 图片等比例放大，宽度超出了，先确定宽度
{
imgWidth = (int)(paperWidth - margin * 2);
imgHeight = (int)((double)image.Height * (double)imgWidth / (double)image.Width - margin * 2);
}
else
{
imgHeight = (int)(paperHeight - margin * 2);
imgWidth = (int)((double)image.Width / (double)image.Height * imgHeight - margin * 2);
}
e.Graphics.DrawImage(image, margin, margin, imgWidth, imgHeight);
}
if (pages < pdfDocument.PageCount - 1)
{
e.HasMorePages = true; //HaeMorePages属性为True时，PrintPage的回调函数就会被再次调用，打印一个页面。
pages++;
}
else
{
//预览界面点击打印需要把索引重新初始化
pages = 0;
}
}
public static void PreViewPage(object sender, PrintPageEventArgs e, PdfiumViewer.PdfDocument pdfDocument, string direction, ref int?pages)
{
PageSettings settings = e.PageSettings;
var paperHeight = settings.PaperSize.Height;
var paperWidth = settings.PaperSize.Width;
int margin = 10;
var imgHeight = 0;
var imgWidth = 0;
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
ImageScaling(image, paperHeight, paperWidth, margin, direction, ref imgHeight, ref imgWidth);
if (direction == "2") //2:横向打印（html转pdf的有问题，html转pdf不考虑宽度，转出来标准的pdf页，分页也已经完成，在这部分就处理不了）
{
e.Graphics.TranslateTransform(0, paperHeight); //旋转原点
e.Graphics.RotateTransform(-90.0F); //旋转角度
}
e.Graphics.DrawImage(image, margin, margin, imgWidth, imgHeight);
}
if (pages < pdfDocument.PageCount - 1)
{
e.HasMorePages = true; //HaeMorePages属性为True时，PrintPage的回调函数就会被再次调用，打印一个页面。
pages++;
}
else
{
//预览界面点击打印需要把索引重新初始化
pages = 0;
}
}
private BitmapImage GetPdfPageImage(PdfiumViewer.PdfDocument pDoc, int pageNum)
{
BitmapImage image = new BitmapImage();
Bitmap img;
MemoryStream stream = new MemoryStream();
img = (Bitmap)pDoc.Render(pageNum, 96.0f, 96.0f, true);
img.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.StreamSource = stream;
image.EndInit();
image.Freeze();
return(image);
}
public Sprite GetPage(PdfiumViewer.PdfDocument doc, int pageNum)
{
if (pageNum >= doc.PageCount)
{
return(null);
}
var tempPath = Application.persistentDataPath + _targetFolder + "_tempImage_.png";
if (FileBrowserHelpers.FileExists(tempPath))
{
FileBrowserHelpers.DeleteFile(tempPath);
}
var image = doc.Render(pageNum, 72, 72, false);
image.Save(tempPath, System.Drawing.Imaging.ImageFormat.Png);
var sprite = LoadSprite(tempPath);
return(sprite);
}
public static void Pdf2Jpg(PdfiumViewer.PdfDocument pdfDocument, string targetPath, int?pages, string folderName)
{
if (string.IsNullOrEmpty(targetPath))
{
throw new ArgumentNullException("targetPath");
}
var dir = Path.GetDirectoryName(targetPath);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
if (pdfDocument.PageCount == 1)
{
pages = 1;
}
var imageDir = Path.Combine(dir, string.IsNullOrEmpty(folderName) ? Guid.NewGuid().ToString() : folderName);
Directory.CreateDirectory(imageDir);
if (pages != null)
{
pages--;//PdfiumViewer.PdfDocument的页数是从0开始的
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
if (ConfigDefine.Pdf2JpgScaleRatio != 0)
{
Stream imageStream = new MemoryStream();
image.Save(imageStream, ImageFormat.Jpeg);
int imgWidth = Convert.ToInt32(image.Width * ConfigDefine.Pdf2JpgScaleRatio);
int imgHeight = Convert.ToInt32(image.Height * ConfigDefine.Pdf2JpgScaleRatio);
using (var imgScaleStream = ImageScale2Stream(imageStream, imgWidth, imgHeight, ""))
{
using (var imgScale = System.Drawing.Image.FromStream(imgScaleStream))
{
imgScale.Save(Path.Combine(imageDir, folderName + ".jpg"));
//imgScale.Save(targetPath);
}
}
}
else
{
image.Save(Path.Combine(imageDir, folderName + ".jpg"));
//image.Save(targetPath);
}
}
}
else
{
for (pages = 0; pages < pdfDocument.PageCount; pages++)
{
using (var image = pdfDocument.Render(pages.Value, ConfigDefine.Pdf2JpgResolution, ConfigDefine.Pdf2JpgResolution, PdfiumViewer.PdfRenderFlags.CorrectFromDpi))
{
if (ConfigDefine.Pdf2JpgScaleRatio != 0)
{
Stream imageStream = new MemoryStream();
image.Save(imageStream, ImageFormat.Jpeg);
int imgWidth = Convert.ToInt32(image.Width * ConfigDefine.Pdf2JpgScaleRatio);
int imgHeight = Convert.ToInt32(image.Height * ConfigDefine.Pdf2JpgScaleRatio);
using (var imgScaleStream = ImageScale2Stream(imageStream, imgWidth, imgHeight, ""))
{
using (var imgScale = System.Drawing.Image.FromStream(imgScaleStream))
{
imgScale.Save(Path.Combine(imageDir, pages + ".jpg"));
}
}
}
else
{
image.Save(Path.Combine(imageDir, pages + ".jpg"));
}
}
}
//图片拼接
//MergerImage(imageDir, targetPath);
/*
* try
* {
* //删除文件夹
* Directory.Delete(imageDir, true);
* }
* catch (Exception ex)
* {
* //Send(string.Format("删除临时目录出错：{0};其他错误信息：{1}", imageDir, ex));
* throw new ArgumentNullException(string.Format("删除临时目录出错：{0};其他错误信息：{1}", imageDir, ex));
* }
* */
}
}