影象處理控制元件Aspose.Imaging v19.6新版亮點示例詳解（2）
阿新 • • 發佈：2019-08-13
Aspose.Imaging for .NET一種高階影象處理控制元件，允許開發人員建立，編輯，繪製或轉換影象。影象匯出和轉換是API核心功能之一，它允許在不安裝Photoshop應用程式或任何其他影象編輯器的情況下儲存為AdobePhotoshop®本機格式。
近期釋出了Aspose.Imaging for .NET v19.6，JPEG輸出中不再保留IMAGINGNET-3351 DPI屬性，下面我們一起來探索新版中的新增功能及其工作原理。>>歡迎下載Aspose.Imaging for .NET v19.6體驗
▲JPEG輸出中不保留IMAGINGNET-3351 DPI屬性
string dir = "c:\\aspose.work\\IMAGINGNET\\3351\\";
using (Aspose.Imaging.FileFormats.Tiff.TiffImage tiffImage = (Aspose.Imaging.FileFormats.Tiff.TiffImage)Image.Load(dir + "source2.tif"))
{
int i = 0;
foreach (Aspose.Imaging.FileFormats.Tiff.TiffFrame tiffFrame in tiffImage.Frames)
{
Aspose.Imaging.ImageOptions.JpegOptions saveOptions = new Aspose.Imaging.ImageOptions.JpegOptions();
saveOptions.ResolutionSettings = new ResolutionSetting(tiffFrame.HorizontalResolution, tiffFrame.VerticalResolution);
if (tiffFrame.FrameOptions != null)
{
// Set the resolution unit explicitly.
switch (tiffFrame.FrameOptions.ResolutionUnit)
{
case Aspose.Imaging.FileFormats.Tiff.Enums.TiffResolutionUnits.None:
saveOptions.ResolutionUnit = ResolutionUnit.None;
break;
case Aspose.Imaging.FileFormats.Tiff.Enums.TiffResolutionUnits.Inch:
saveOptions.ResolutionUnit = ResolutionUnit.Inch;
break;
case Aspose.Imaging.FileFormats.Tiff.Enums.TiffResolutionUnits.Centimeter:
saveOptions.ResolutionUnit = ResolutionUnit.Cm;
break;
default:
throw new System.NotSupportedException();
}
}
string fileName = "source2.tif.frame." + (i++) + "." + saveOptions.ResolutionUnit + ".jpg";
tiffFrame.Save(dir + fileName, saveOptions);
}
}
▲IMAGINGNET-3321載入PNG影象時佔用大量記憶體
using (Image image = Image.Load("halfGigImage.png")) {
// todo something
}
▲IMAGINGNET-3287將WMF轉換為SVG時會新增邊距
string dir = "c:\\aspose.work\\IMAGINGNET\\3287\\";
string fileName = dir + "image2.wmf";
// Save WMF to SVG
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(fileName))
{
// The customer uses EmfRasterizationOptions instead of WmfRasterizationOptions.
// EmfRasterizationOptions works correctly in .NET as well.
Aspose.Imaging.ImageOptions.WmfRasterizationOptions rasterizationOptions = new Aspose.Imaging.ImageOptions.WmfRasterizationOptions();
rasterizationOptions.PageSize = image.Size;
Aspose.Imaging.ImageOptions.SvgOptions saveOptions = new Aspose.Imaging.ImageOptions.SvgOptions();
saveOptions.VectorRasterizationOptions = rasterizationOptions;
image.Save(fileName + ".svg", saveOptions);
}
// Save WMF to PNG
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(fileName))
{
// The customer uses EmfRasterizationOptions instead of WmfRasterizationOptions.
// EmfRasterizationOptions works correctly in .NET as well.
Aspose.Imaging.ImageOptions.WmfRasterizationOptions rasterizationOptions = new Aspose.Imaging.ImageOptions.WmfRasterizationOptions();
rasterizationOptions.PageSize = image.Size;
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
saveOptions.VectorRasterizationOptions = rasterizationOptions;
image.Save(fileName + ".png", saveOptions);
}▲IMAGINGNET-3378在將WMF轉換為PNG時裁剪影象寬度和高度
public void WmfToJpg()
{
using (Image image = Image.Load("portrt.wmf")) {
image.Save(
"portrt.jpg",
new JpegOptions()
{
VectorRasterizationOptions = new WmfRasterizationOptions
{
BackgroundColor = Color.WhiteSmoke,
PageWidth = image.Width,
PageHeight = image.Height,
}
});
}
}
public void WmfToPngWithBorders()
{
using (Image image = Image.Load("portrt.wmf")) {
image.Save(
"portrt.png",
new PngOptions()
{
VectorRasterizationOptions = new WmfRasterizationOptions
{
BackgroundColor = Color.WhiteSmoke,
PageWidth = image.Width,
PageHeight = image.Height,
BorderX = 50,
BorderY = 20
}
});
}
}
▲IMAGINGNET-3336使用ODG檔案格式時，將在控制檯中列印文字
string fileName = "example.odg";
using (OdgImage image = (OdgImage)Image.Load(fileName))
{
}
▲IMAGINGNET-3421 GIF檔案未正確轉換為PDF
public void TestExportGifToPdf()
{
string[] fileNames = new [] {
"czone.gif",
"DTRA_LogoType.gif",
"DTRA_Seal.gif",
"Equip1.gif",
"Equip2.gif",
"Equip3.gif"
};
foreach (string fileName in fileNames) {
using (Image image = Image.Load(fileName))
{
image.Save(fileName + ".pdf", new PdfOptions());
}
}
}
▲IMAGINGNET-3205 RotateFlip操作與PSD無法正常工作
// RotateFlip operation doesn't work as expected with PSD
string sourceFile = "1.psd";
string pngPath = "RotateFlipTest2617.png";
string psdPath = "RotateFlipTest2617.psd";
RotateFlipType flipType = RotateFlipType.Rotate270FlipXY;
using (var im = (PsdImage)(Image.Load(sourceFile)))
{
im.RotateFlip(flipType);
im.Save(pngPath, new PngOptions() { ColorType = PngColorType.TruecolorWithAlpha });
im.Save(psdPath);
}
▲IMAGINGNET-3374將DJVU格式轉換為影象的問題
using (DjvuImage image = (DjvuImage)Imaging.Image.Load(@"input.djvu"))
{
PngOptions exportOptions = new PngOptions();
for (int i = 0; i < image.Pages.Length; i++)
{
DjvuPage page = image.Pages[i];
page.Save(@"page" + i + ".png", exportOptions);
}
}
▲IMAGINGNET-3339 SvgRasterizationOptions大小設定不起作用
using (Image image = Image.Load("test.svg"))
{
image.Save("test.svg_out.bmp",
new BmpOptions()
{
VectorRasterizationOptions = new SvgRasterizationOptions()
{
PageWidth = 100,
PageHeight = 200
}
});
}
-- 未完待