Class PngOptions
Class PngOptions
이름 공간 : Aspose.Imaging.ImageOptions 모임: Aspose.Imaging.dll (25.4.0)
고품질의 휴대용 네트워크 그래픽 (PNG) 라스터 이미지를 쉽게 만들기우리의 API와 함께, 압축 수준에 대한 사용자 지정 옵션을 제공,픽셀 깊이에 비트, 그리고 알파 비트. XMP 메타 데이터 컨테이너를 무조건 처리,포괄적 인 이미지 메타 데이터 관리를 보장하고 적응할 수 있도록PNG 이미지는 귀하의 정확한 사양에 쉽게 제공됩니다.
public class PngOptions : ImageOptionsBase, IDisposable, IHasXmpData, IHasMetadata, ICloneableInheritance
object ← DisposableObject ← ImageOptionsBase ← PngOptions
Derived
Implements
IDisposable , IHasXmpData , IHasMetadata , ICloneable
상속 회원들
ImageOptionsBase.Clone() , ImageOptionsBase.ReleaseManagedResources() , ImageOptionsBase.KeepMetadata , ImageOptionsBase.XmpData , ImageOptionsBase.Source , ImageOptionsBase.Palette , ImageOptionsBase.ResolutionSettings , ImageOptionsBase.VectorRasterizationOptions , ImageOptionsBase.BufferSizeHint , ImageOptionsBase.MultiPageOptions , ImageOptionsBase.FullFrame , ImageOptionsBase.ProgressEventHandler , DisposableObject.Dispose() , DisposableObject.ReleaseManagedResources() , DisposableObject.ReleaseUnmanagedResources() , DisposableObject.VerifyNotDisposed() , DisposableObject.Disposed , object.GetType() , object.MemberwiseClone() , object.ToString() , object.Equals(object?) , object.Equals(object?, object?) , object.ReferenceEquals(object?, object?) , object.GetHashCode()
Examples
이 예제는 SaveOptions Namespace에서 수출 목적으로 다른 클래스를 사용하는 것을 보여줍니다.Gif 형식의 이미지가 이미지의 예제로 업로드되고 여러 형식으로 수출됩니다.
string dir = "c:\\temp\\";
//Load an existing image (of type Gif) in an instance of Image class
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.gif"))
{
//Export to BMP file format using the default options
image.Save(dir + "output.bmp", new Aspose.Imaging.ImageOptions.BmpOptions());
//Export to JPEG file format using the default options
image.Save(dir + "output.jpg", new Aspose.Imaging.ImageOptions.JpegOptions());
//Export to PNG file format using the default options
image.Save(dir + "output.png", new Aspose.Imaging.ImageOptions.PngOptions());
//Export to TIFF file format using the default options
image.Save(dir + "output.tif", new Aspose.Imaging.ImageOptions.TiffOptions(Aspose.Imaging.FileFormats.Tiff.Enums.TiffExpectedFormat.Default));
}다음 예제는 특정 이미지 유형을 참조하지 않고 여러 페이지 벡터 이미지를 일반적으로 PNG 형식으로 변환하는 방법을 보여줍니다.
string dir = "C:\\aspose.imaging\\net\\misc\\ImagingReleaseQATester\\Tests\\testdata\\2548";
string inputFilePath = System.IO.Path.Combine(dir, "Multipage.cdr");
string outputFilePath = System.IO.Path.Combine(dir, "Multipage.cdr.png");
Aspose.Imaging.ImageOptionsBase exportOptions = new Aspose.Imaging.ImageOptions.PngOptions();
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(inputFilePath))
{
exportOptions.MultiPageOptions = null;
// Export only first two pages. In fact, only one page will be rasterized because PNG is not a multi-page format.
Aspose.Imaging.IMultipageImage multipageImage = image as Aspose.Imaging.IMultipageImage;
if (multipageImage != null && (multipageImage.Pages != null && multipageImage.PageCount > 2))
{
exportOptions.MultiPageOptions = new Aspose.Imaging.ImageOptions.MultiPageOptions(new Aspose.Imaging.IntRange(0, 2));
}
if (image is Aspose.Imaging.VectorImage)
{
exportOptions.VectorRasterizationOptions = (Aspose.Imaging.ImageOptions.VectorRasterizationOptions)image.GetDefaultOptions(new object[] { Aspose.Imaging.Color.White, image.Width, image.Height });
exportOptions.VectorRasterizationOptions.TextRenderingHint = Aspose.Imaging.TextRenderingHint.SingleBitPerPixel;
exportOptions.VectorRasterizationOptions.SmoothingMode = Aspose.Imaging.SmoothingMode.None;
}
image.Save(outputFilePath, exportOptions);
}이 예제는 이미지 표면에 원시 형태를 만들기 위해 그래픽 클래스를 사용합니다.이 작업을 보여주기 위해, 예제는 PNG 형식으로 새로운 이미지를 만들고 그래픽 클래스에 의해 노출 된 그림 방법을 사용하여 이미지 표면에 원시 형태를 그립니다.
//Creates an instance of FileStream
using (System.IO.FileStream stream = new System.IO.FileStream(@"C:\temp\output.png", System.IO.FileMode.Create))
{
//Create an instance of PngOptions and set its various properties
Aspose.Imaging.ImageOptions.PngOptions pngOptions = new Aspose.Imaging.ImageOptions.PngOptions();
//Set the Source for PngOptions
pngOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream);
//Create an instance of Image
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Create(pngOptions, 500, 500))
{
//Create and initialize an instance of Graphics class
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(image);
//Clear Graphics surface
graphics.Clear(Aspose.Imaging.Color.Wheat);
//Draw an Arc by specifying the Pen object having Black color,
//a Rectangle surrounding the Arc, Start Angle and Sweep Angle
graphics.DrawArc(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Black, 2), new Aspose.Imaging.Rectangle(200, 200, 100, 200), 0, 300);
//Draw a Bezier by specifying the Pen object having Blue color and co-ordinate Points.
graphics.DrawBezier(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Blue, 2), new Aspose.Imaging.Point(250, 100), new Aspose.Imaging.Point(300, 30), new Aspose.Imaging.Point(450, 100), new Aspose.Imaging.Point(235, 25));
//Draw a Curve by specifying the Pen object having Green color and an array of Points
graphics.DrawCurve(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Green, 2), new[] { new Aspose.Imaging.Point(100, 200), new Aspose.Imaging.Point(100, 350), new Aspose.Imaging.Point(200, 450) });
//Draw an Ellipse using the Pen object and a surrounding Rectangle
graphics.DrawEllipse(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Yellow, 2), new Aspose.Imaging.Rectangle(300, 300, 100, 100));
//Draw a Line
graphics.DrawLine(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Violet, 2), new Aspose.Imaging.Point(100, 100), new Aspose.Imaging.Point(200, 200));
//Draw a Pie segment
graphics.DrawPie(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Silver, 2), new Aspose.Imaging.Rectangle(new Aspose.Imaging.Point(200, 20), new Aspose.Imaging.Size(200, 200)), 0, 45);
//Draw a Polygon by specifying the Pen object having Red color and an array of Points
graphics.DrawPolygon(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Red, 2), new[] { new Aspose.Imaging.Point(20, 100), new Aspose.Imaging.Point(20, 200), new Aspose.Imaging.Point(220, 20) });
//Draw a Rectangle
graphics.DrawRectangle(new Aspose.Imaging.Pen(Aspose.Imaging.Color.Orange, 2), new Aspose.Imaging.Rectangle(new Aspose.Imaging.Point(250, 250), new Aspose.Imaging.Size(100, 100)));
//Create a SolidBrush object and set its various properties
Aspose.Imaging.Brushes.SolidBrush brush = new Aspose.Imaging.Brushes.SolidBrush();
brush.Color = Color.Purple;
brush.Opacity = 100;
//Draw a String using the SolidBrush object and Font, at specific Point
graphics.DrawString("This image is created by Aspose.Imaging API", new Aspose.Imaging.Font("Times New Roman", 16), brush, new Aspose.Imaging.PointF(50, 400));
// save all changes.
image.Save();
}
}Constructors
PngOptions()
Aspose.Imaging.ImageOptions.PngOptions 클래스의 새로운 예를 시작합니다.
public PngOptions()PngOptions(PngOptions)
Aspose.Imaging.ImageOptions.PngOptions 클래스의 새로운 예를 시작합니다.
public PngOptions(PngOptions pngOptions)Parameters
pngOptions PngOptions
PNG 옵션
Fields
DefaultCompressionLevel
기본 압축 수준입니다.
public const int DefaultCompressionLevel = 6필드 가치
Properties
BitDepth
비트 깊이 값을 1, 2, 4, 8, 16의 범위로 얻거나 설정합니다.
다음과 같은 한계를 고려하십시오 :
Aspose.Imaging.FileFormats.Png.Type.IndexedColor는 1, 2, 4, 8의 비트 깊이를 지원합니다.
WL17_.FileFormats.Png.pngColorType.Grayscale, _Wl17.fileFormates. Png. pngcolor타입.그레이스케일WithAlpha 지원 비트 깊이 8입니다.
WL17_.FileFormats.Png.pngColorType.Truecolor, _Wl17.fileFormates. Png. pngcolor타이프.트루코어WithAlpha 지원 비트 깊이 8, 16입니다.
public byte BitDepth { get; set; }부동산 가치
Examples
이 예제는 지정된 옵션으로 PNG 이미지를 만드는 방법을 보여주고, 선형 그라디언트 색상으로 채우고 파일에 저장합니다.
string dir = "c:\\temp\\";
Aspose.Imaging.ImageOptions.PngOptions createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// The number of bits per color channel
createOptions.BitDepth = 8;
// Each pixel is a (red, green, blue) triple followed by the alpha component.
createOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// The maximum level of compression.
createOptions.CompressionLevel = 9;
// Usage of filters allows to compress continuous tonal images more effectively.
createOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Sub;
// Use progressive loading
createOptions.Progressive = true;
// Create a PNG image with custom parameters.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(createOptions, 100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with a semi-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.explicitoptions.png");
}다음 예제는 다양한 옵션을 사용하여 PNG 형식으로 이미지를 저장하는 방법을 보여줍니다.
string dir = "c:\\temp\\";
// Create a PNG image of 100x100 px.
// You can also load image of any supported format from a file or a stream.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with the blue-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// Progressive loading.
saveOptions.Progressive = true;
// Set the horizontal and vertical resolution to 96 pixels per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
// Each pixel is a (red, green, blue) triple followed by alpha.
saveOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// Set the maximum level of compression.
saveOptions.CompressionLevel = 9;
// This is the best compression, but the slowest execution time.
// Adaptive filtering means that saving process will choose most sutable filter for each data row.
saveOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Adaptive;
// The number of bits per channel.
saveOptions.BitDepth = 8;
// Save to a file.
pngImage.Save(dir + "output.png", saveOptions);
}ColorType
얻거나 색의 유형을 설정합니다.
public PngColorType ColorType { get; set; }부동산 가치
Examples
다음 예제는 PNG 이미지를 인덱스 된 색상을 사용하여 가장 적합한 팔레트로 압축하는 방법을 보여줍니다.
// Loads png image
string sourceFilePath="OriginalRings.png";
string outputFilePath="OriginalRingsOutput.png";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(sourceFilePath))
{
image.Save(outputFilePath, new Aspose.Imaging.ImageOptions.PngOptions()
{
Progressive = true,
// Use indexed color type
ColorType = Aspose.Imaging.FileFormats.Png.PngColorType.IndexedColor,
// Use maximal compression
CompressionLevel = 9,
// Get the closest 8-bit color palette which covers as many pixels as possible, so that a palettized image
// is almost visually indistinguishable from a non-palletized one.
Palette = Aspose.Imaging.ColorPaletteHelper.GetCloseImagePalette((Aspose.Imaging.RasterImage)image, 256, Aspose.Imaging.PaletteMiningMethod.Histogram)
});
}
// The output file size should be significantly reduced이 예제는 지정된 옵션으로 PNG 이미지를 만드는 방법을 보여주고, 선형 그라디언트 색상으로 채우고 파일에 저장합니다.
string dir = "c:\\temp\\";
Aspose.Imaging.ImageOptions.PngOptions createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// The number of bits per color channel
createOptions.BitDepth = 8;
// Each pixel is a (red, green, blue) triple followed by the alpha component.
createOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// The maximum level of compression.
createOptions.CompressionLevel = 9;
// Usage of filters allows to compress continuous tonal images more effectively.
createOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Sub;
// Use progressive loading
createOptions.Progressive = true;
// Create a PNG image with custom parameters.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(createOptions, 100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with a semi-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.explicitoptions.png");
}다음 예제는 다양한 옵션을 사용하여 PNG 형식으로 이미지를 저장하는 방법을 보여줍니다.
string dir = "c:\\temp\\";
// Create a PNG image of 100x100 px.
// You can also load image of any supported format from a file or a stream.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with the blue-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// Progressive loading.
saveOptions.Progressive = true;
// Set the horizontal and vertical resolution to 96 pixels per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
// Each pixel is a (red, green, blue) triple followed by alpha.
saveOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// Set the maximum level of compression.
saveOptions.CompressionLevel = 9;
// This is the best compression, but the slowest execution time.
// Adaptive filtering means that saving process will choose most sutable filter for each data row.
saveOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Adaptive;
// The number of bits per channel.
saveOptions.BitDepth = 8;
// Save to a file.
pngImage.Save(dir + "output.png", saveOptions);
}CompressionLevel
0-9의 범위에서 Aspose.Imaging.FileFormats.Png.PngImage 압축 수준을 얻거나 설정합니다.
public int CompressionLevel { get; set; }부동산 가치
Examples
다음 예제는 PNG 이미지를 인덱스 된 색상을 사용하여 가장 적합한 팔레트로 압축하는 방법을 보여줍니다.
// Loads png image
string sourceFilePath="OriginalRings.png";
string outputFilePath="OriginalRingsOutput.png";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(sourceFilePath))
{
image.Save(outputFilePath, new Aspose.Imaging.ImageOptions.PngOptions()
{
Progressive = true,
// Use indexed color type
ColorType = Aspose.Imaging.FileFormats.Png.PngColorType.IndexedColor,
// Use maximal compression
CompressionLevel = 9,
// Get the closest 8-bit color palette which covers as many pixels as possible, so that a palettized image
// is almost visually indistinguishable from a non-palletized one.
Palette = Aspose.Imaging.ColorPaletteHelper.GetCloseImagePalette((Aspose.Imaging.RasterImage)image, 256, Aspose.Imaging.PaletteMiningMethod.Histogram)
});
}
// The output file size should be significantly reduced이 예제는 지정된 옵션으로 PNG 이미지를 만드는 방법을 보여주고, 선형 그라디언트 색상으로 채우고 파일에 저장합니다.
string dir = "c:\\temp\\";
Aspose.Imaging.ImageOptions.PngOptions createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// The number of bits per color channel
createOptions.BitDepth = 8;
// Each pixel is a (red, green, blue) triple followed by the alpha component.
createOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// The maximum level of compression.
createOptions.CompressionLevel = 9;
// Usage of filters allows to compress continuous tonal images more effectively.
createOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Sub;
// Use progressive loading
createOptions.Progressive = true;
// Create a PNG image with custom parameters.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(createOptions, 100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with a semi-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.explicitoptions.png");
}다음 예제는 다양한 옵션을 사용하여 PNG 형식으로 이미지를 저장하는 방법을 보여줍니다.
string dir = "c:\\temp\\";
// Create a PNG image of 100x100 px.
// You can also load image of any supported format from a file or a stream.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with the blue-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// Progressive loading.
saveOptions.Progressive = true;
// Set the horizontal and vertical resolution to 96 pixels per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
// Each pixel is a (red, green, blue) triple followed by alpha.
saveOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// Set the maximum level of compression.
saveOptions.CompressionLevel = 9;
// This is the best compression, but the slowest execution time.
// Adaptive filtering means that saving process will choose most sutable filter for each data row.
saveOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Adaptive;
// The number of bits per channel.
saveOptions.BitDepth = 8;
// Save to a file.
pngImage.Save(dir + "output.png", saveOptions);
}FilterType
png 파일 저장 과정에서 사용되는 필터 유형을 얻거나 설정합니다.
public PngFilterType FilterType { get; set; }부동산 가치
Examples
이 예제는 지정된 옵션으로 PNG 이미지를 만드는 방법을 보여주고, 선형 그라디언트 색상으로 채우고 파일에 저장합니다.
string dir = "c:\\temp\\";
Aspose.Imaging.ImageOptions.PngOptions createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// The number of bits per color channel
createOptions.BitDepth = 8;
// Each pixel is a (red, green, blue) triple followed by the alpha component.
createOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// The maximum level of compression.
createOptions.CompressionLevel = 9;
// Usage of filters allows to compress continuous tonal images more effectively.
createOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Sub;
// Use progressive loading
createOptions.Progressive = true;
// Create a PNG image with custom parameters.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(createOptions, 100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with a semi-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.explicitoptions.png");
}다음 예제는 다른 필터 유형이 출력 PNG 이미지의 크기에 어떤 영향을 미치는지 보여줍니다.
Aspose.Imaging.FileFormats.Png.PngFilterType[] filterTypes = new Aspose.Imaging.FileFormats.Png.PngFilterType[]
{
Aspose.Imaging.FileFormats.Png.PngFilterType.None,
Aspose.Imaging.FileFormats.Png.PngFilterType.Up,
Aspose.Imaging.FileFormats.Png.PngFilterType.Sub,
Aspose.Imaging.FileFormats.Png.PngFilterType.Paeth,
Aspose.Imaging.FileFormats.Png.PngFilterType.Avg,
Aspose.Imaging.FileFormats.Png.PngFilterType.Adaptive,
};
foreach (Aspose.Imaging.FileFormats.Png.PngFilterType filterType in filterTypes)
{
Aspose.Imaging.ImageOptions.PngOptions options = new Aspose.Imaging.ImageOptions.PngOptions();
using (Aspose.Imaging.Image image = Image.Load("c:\\temp\\sample.png"))
{
// Set a filter type
options.FilterType = filterType;
using (System.IO.MemoryStream stream = new System.IO.MemoryStream())
{
image.Save(stream, options);
System.Console.WriteLine("The filter type is {0}, the output image size is {1} bytes.", filterType, stream.Length);
}
}
}
//The output may look like this:
//The filter type is None, the output image size is 116845 bytes.
//The filter type is Up, the output image size is 86360 bytes.
//The filter type is Sub, the output image size is 94907 bytes.
//The filter type is Paeth, the output image size is 86403 bytes.
//The filter type is Avg, the output image size is 89956 bytes.
//The filter type is Adaptive, the output image size is 97248 bytes.다음 예제는 다양한 옵션을 사용하여 PNG 형식으로 이미지를 저장하는 방법을 보여줍니다.
string dir = "c:\\temp\\";
// Create a PNG image of 100x100 px.
// You can also load image of any supported format from a file or a stream.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with the blue-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// Progressive loading.
saveOptions.Progressive = true;
// Set the horizontal and vertical resolution to 96 pixels per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
// Each pixel is a (red, green, blue) triple followed by alpha.
saveOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// Set the maximum level of compression.
saveOptions.CompressionLevel = 9;
// This is the best compression, but the slowest execution time.
// Adaptive filtering means that saving process will choose most sutable filter for each data row.
saveOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Adaptive;
// The number of bits per channel.
saveOptions.BitDepth = 8;
// Save to a file.
pngImage.Save(dir + "output.png", saveOptions);
}Progressive
Aspose.Imaging.FileFormats.Png.PngImage가 진보적 인지 여부를 나타내는 값을 얻거나 설정합니다.
public bool Progressive { get; set; }부동산 가치
Examples
다음 예제는 PNG 이미지를 인덱스 된 색상을 사용하여 가장 적합한 팔레트로 압축하는 방법을 보여줍니다.
// Loads png image
string sourceFilePath="OriginalRings.png";
string outputFilePath="OriginalRingsOutput.png";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(sourceFilePath))
{
image.Save(outputFilePath, new Aspose.Imaging.ImageOptions.PngOptions()
{
Progressive = true,
// Use indexed color type
ColorType = Aspose.Imaging.FileFormats.Png.PngColorType.IndexedColor,
// Use maximal compression
CompressionLevel = 9,
// Get the closest 8-bit color palette which covers as many pixels as possible, so that a palettized image
// is almost visually indistinguishable from a non-palletized one.
Palette = Aspose.Imaging.ColorPaletteHelper.GetCloseImagePalette((Aspose.Imaging.RasterImage)image, 256, Aspose.Imaging.PaletteMiningMethod.Histogram)
});
}
// The output file size should be significantly reduced이 예제는 지정된 옵션으로 PNG 이미지를 만드는 방법을 보여주고, 선형 그라디언트 색상으로 채우고 파일에 저장합니다.
string dir = "c:\\temp\\";
Aspose.Imaging.ImageOptions.PngOptions createOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// The number of bits per color channel
createOptions.BitDepth = 8;
// Each pixel is a (red, green, blue) triple followed by the alpha component.
createOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// The maximum level of compression.
createOptions.CompressionLevel = 9;
// Usage of filters allows to compress continuous tonal images more effectively.
createOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Sub;
// Use progressive loading
createOptions.Progressive = true;
// Create a PNG image with custom parameters.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(createOptions, 100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with a semi-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
// Save to a file.
pngImage.Save(dir + "output.explicitoptions.png");
}다음 예제는 다양한 옵션을 사용하여 PNG 형식으로 이미지를 저장하는 방법을 보여줍니다.
string dir = "c:\\temp\\";
// Create a PNG image of 100x100 px.
// You can also load image of any supported format from a file or a stream.
using (Aspose.Imaging.FileFormats.Png.PngImage pngImage = new Aspose.Imaging.FileFormats.Png.PngImage(100, 100))
{
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(pngImage.Width, pngImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Transparent);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(pngImage);
// Fill the image with the blue-transparent gradient.
graphics.FillRectangle(gradientBrush, pngImage.Bounds);
Aspose.Imaging.ImageOptions.PngOptions saveOptions = new Aspose.Imaging.ImageOptions.PngOptions();
// Progressive loading.
saveOptions.Progressive = true;
// Set the horizontal and vertical resolution to 96 pixels per inch.
saveOptions.ResolutionSettings = new Aspose.Imaging.ResolutionSetting(96.0, 96.0);
// Each pixel is a (red, green, blue) triple followed by alpha.
saveOptions.ColorType = Imaging.FileFormats.Png.PngColorType.TruecolorWithAlpha;
// Set the maximum level of compression.
saveOptions.CompressionLevel = 9;
// This is the best compression, but the slowest execution time.
// Adaptive filtering means that saving process will choose most sutable filter for each data row.
saveOptions.FilterType = Aspose.Imaging.FileFormats.Png.PngFilterType.Adaptive;
// The number of bits per channel.
saveOptions.BitDepth = 8;
// Save to a file.
pngImage.Save(dir + "output.png", saveOptions);
}
