图像处理控件Aspose.Imaging最新版功能亮点示例详解
Aspose.Imaging for .NET一种高级图像处理控件，允许开发人员创建，编辑，绘制或转换图像。图像导出和转换是API核心功能之一，它允许在不安装Photoshop应用程序或任何其他图像编辑器的情况下保存为AdobePhotoshop?本机格式。
近期发布了Aspose.Imaging for .NET v19.7，支持PartialRotater类中的优化策略，支持OTG（OpenDocument图形模板），下面我们一起来探索新版中的新增功能及其工作原理。
▲IMAGINGNET-2926 - 将PSD保存到PDF中不提供可选择的文本
//将文本转换为向量对象
using (Image image=Image.Load("text.psd"))
{
image.Save(fileName + "text_vector.pdf", new PdfOptions());
}//
//老式的转换与充分光栅化
using (Image image=Image.Load("text.psd", new PsdLoadOptions() { ReadOnlyMode=true }))
{
image.Save(fileName + "text_vector.pdf", new PdfOptions());
}
▲IMAGINGNET-3381 - 在PartialRotater类中支持优化策略
//为目标加载的图像设置50兆字节的内存限制
using (var image=Image.Load(imageFilePath, new LoadOptions() { BufferSizeHint=50 })) {
//执行RotateFlip操作
image.RotateFlip(RotateFlipType.Rotate90FlipNone);
//执行旋转操作
((RasterImage)image).Rotate(60); // rotate 60 degrees clockwise
}
▲IMAGINGNET-2044 - 支持OTG (OpenDocument图形模板)
string baseFolder="D:";
string fileName="VariousObjectsMultiPage.otg";
ImageOptionsBase[] options={ new PngOptions(), new PdfOptions() };
foreach (ImageOptionsBase item in options)
{
string inputFileName=Pathbine(baseFolder, fileName);
string fileExt=item is PngOptions ? ".png" : ".pdf";
string outputFileName=Pathbine(baseFolder, fileName + fileExt);
using (Image image=Image.Load(inputFileName))
{
OtgRasterizationOptions otgRasterizationOptions=new OtgRasterizationOptions();
otgRasterizationOptions.PageSize=image.Size;
item.VectorRasterizationOptions=otgRasterizationOptions;
image.Save(outputFileName, item);
}
}
▲IMAGINGNET-3442 - Bpmn SVG转换导致陌生的PNG
using（Image image=Image.Load（“input.svg”））
{
image.Save（
“output.png”，
new PngOptions（）
{
VectorRasterizationOptions=new SvgRasterizationOptions
{
PageSize=image.Size，
}
}）;
}
▲IMAGINGNET-3430 - 支持PDFOptions中的DPI设置
string baseFolder=“D：
”;
string fileName=“standardSize.tif”;
string inputFileName=Pathbine（baseFolder，fileName）;
string outFileName=inputFileName +“。pdf”;
using（Image image=Image.Load（inputFileName））
{
PdfOptions pdfOptions=new PdfOptions {PageSize=new SizeF（612,792 ）};
image.Save（outFileName，pdfOptions）;
}
▲IMAGINGNET-3286 - 没有从WMF到SVG的真正转换
string baseFolder=Pathbine("D:","3286");
string fileName="image2.wmf";
string inputFileName=Pathbine(baseFolder, fileName);
using (Image image=Image.Load(inputFileName))
{
string script=((WmfImage)image).GetPostScript();
string ethlonScript=File.ReadAllText(inputFileName + ".ps");
if (script !=ethlonScript)
{
throw new Exception("script not eqal ethalon script");
}
}
Since PostScript is not supported in Aspose products, further processing is done by **third-party applications**.
For example:
Use ghostscript (ghostscript/)
string baseFolder=Pathbine("D:","3286");
string fileName="image2.wmf";
string inputFileName=Pathbine(baseFolder, fileName);
string scriptFileName=inputFileName + ".ps";
string outputPdfFileName=scriptFileName + ".pdf";
string ghostPath="C:
Program Files (x86)
gs
gs8.61
bin
gswin32c.exe";
string script;
using (Image image=Image.Load(inputFileName))
{
script=((WmfImage)image).GetPostScript();
}
File.WriteAllText(scriptFileName, script);
string cmdArguments=string.Format(" -sDEVICE=pdfwrite -o {0} {1}", outputPdfFileName, scriptFileName);
Process proc=System.Diagnosticscess.Start(ghostPath, cmdArguments);
proc.WaitForExit(60000);
▲IMAGINGNET-3230 - 将Jpeg转换为Tiff会导致绿色覆盖不正确
using（Image image=Image.Load（“input.jpg”））
{
image.Save（“output.tiff”，new TiffOptions（TiffExpectedFormat.TiffJpegRgb））;
}
▲IMAGINGNET-3445 - 来自font文件夹的文件被锁定
string baseFolder=Pathbine("D:", "test");
string fontsFolder=Pathbine(baseFolder, "fonts");
//创建字体文件夹
if (!Directory.Exists(fontsFolder))
{
Directory.CreateDirectory(fontsFolder);
}//
//复制字体到字体文件夹
string fontFile=Pathbine(fontsFolder, "foo.ttf");
if (!File.Exists(fontFile))
{
File.Copy(Pathbine(baseFolder, "foo.ttf"), fontFile);
}//
//设置字体路径
List fonts=new List(FontSettings.GetDefaultFontsFolders());
fonts.Add(fontsFolder);
FontSettings.SetFontsFolders(fonts.ToArray(), true);//
//打开图片
string inputFile=Pathbine(baseFolder, "grinched-regular-font.psd");
string outputFile=inputFile + ".png";
using (Image image=Image.Load(inputFile))
{
PngOptions saveOptions=new PngOptions();
image.Save(outputFile, saveOptions);
}
//删除字体文件夹
Directory.Delete(fontsFolder,true);
▲IMAGINGNET-3444 - 用于调整SVG图像大小的Aspose.Imaging问题
string baseFolder="D:
";
string inputFileName=Pathbine(baseFolder, "logotype.svg");
float scale=10f;
using (Image image=Image.Load(inputFileName))
{
image.Save(inputFileName+".png", new PngOptions()
{
VectorRasterizationOptions=new SvgRasterizationOptions()
{PageSize=image.Size, ScaleX=scale, ScaleY=scale}
});
}
