Class GifOptions
Nama dari : Aspose.Imaging.ImageOptions Pengumpulan: Aspose.Imaging.dll (25.4.0)
API untuk Graphical Interchange Format (GIF) raster image file creation menawarkanpengembang pilihan yang komprehensif untuk menghasilkan gambar GIF dengan ketepatanDengan fitur untuk menetapkan warna latar belakang, palet warna, resolusi,jenis terhubung, warna transparan, konten metadata XMP, dan gambarkompresi, API ini menjamin fleksibilitas dan efisiensi dalam membuat optimisasidan GIF yang menarik secara visual yang disesuaikan dengan persyaratan aplikasi tertentu.
[JsonObject(MemberSerialization.OptIn)]
public class GifOptions : ImageOptionsBase, IDisposable, IHasXmpData, IHasMetadata, ICloneableInheritance
object ← DisposableObject ← ImageOptionsBase ← GifOptions
Implements
IDisposable , IHasXmpData , IHasMetadata , ICloneable
anggota yang diwarisi
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
Contoh ini menunjukkan penggunaan kelas yang berbeda dari SaveOptions Namespace untuk tujuan ekspor. gambar tipe Gif dimuat naik ke contoh Gambar dan kemudian diekspor ke beberapa format.
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));
}Contoh berikut menunjukkan bagaimana untuk menukar gambar vektor multipage ke format GIF secara umum tanpa merujuk pada jenis gambar tertentu.
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.gif");
Aspose.Imaging.ImageOptionsBase exportOptions = new Aspose.Imaging.ImageOptions.GifOptions();
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(inputFilePath))
{
exportOptions.MultiPageOptions = null;
// Export only first two pages. These pages will be presented as animated frames in the output GIF.
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);
}Contoh ini menunjukkan cara memuat informasi Pixel dalam Array Type Color, memanipulasi array dan mengaturnya kembali ke gambar.Untuk melakukan operasi ini, contoh ini menciptakan file Image baru (dalam format GIF) uisng MemoryStream object.
//Create an instance of MemoryStream
using (System.IO.MemoryStream stream = new System.IO.MemoryStream())
{
//Create an instance of GifOptions and set its various properties including the Source property
Aspose.Imaging.ImageOptions.GifOptions gifOptions = new Aspose.Imaging.ImageOptions.GifOptions();
gifOptions.Source = new Aspose.Imaging.Sources.StreamSource(stream);
//Create an instance of Image
using (Aspose.Imaging.RasterImage image = (Aspose.Imaging.RasterImage)Aspose.Imaging.Image.Create(gifOptions, 500, 500))
{
//Get the pixels of image by specifying the area as image boundary
Aspose.Imaging.Color[] pixels = image.LoadPixels(image.Bounds);
//Loop over the Array and sets color of alrenative indexed pixel
for (int index = 0; index < pixels.Length; index++)
{
if (index % 2 == 0)
{
//Set the indexed pixel color to yellow
pixels[index] = Aspose.Imaging.Color.Yellow;
}
else
{
//Set the indexed pixel color to blue
pixels[index] = Aspose.Imaging.Color.Blue;
}
}
//Apply the pixel changes to the image
image.SavePixels(image.Bounds, pixels);
// save all changes.
image.Save();
}
// Write MemoryStream to File
using (System.IO.FileStream fileStream = new System.IO.FileStream(@"C:\temp\output.gif", System.IO.FileMode.Create))
{
stream.WriteTo(fileStream);
}
}Constructors
GifOptions()
Initifikasi contoh baru dari kelas Aspose.Imaging.ImageOptions.GifOptions.
[JsonConstructor]
public GifOptions()GifOptions(GifOptions)
Initifikasi contoh baru dari kelas Aspose.Imaging.ImageOptions.GifOptions.
public GifOptions(GifOptions gifOptions)Parameters
gifOptions GifOptions
dengan opsi GIF.
Properties
BackgroundColor
Dapatkan atau menetapkan warna latar belakang.
[JsonProperty]
public Color BackgroundColor { get; set; }Nilai Properti
BackgroundColorIndex
Dapatkan atau menetapkan indeks warna latar belakang GIF.
public byte BackgroundColorIndex { get; set; }Nilai Properti
ColorResolution
Dapatkan atau menetapkan resolusi warna GIF.
public byte ColorResolution { get; set; }Nilai Properti
Examples
Contoh ini menunjukkan cara menyimpan gambar BMP ke format GIF menggunakan berbagai opsi.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image bmpImage = new Aspose.Imaging.FileFormats.Bmp.BmpImage(1000, 1000))
{
// Fill the entire image with the blue-yellow gradient.
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(bmpImage.Width, bmpImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Yellow);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(bmpImage);
graphics.FillRectangle(gradientBrush, bmpImage.Bounds);
Aspose.Imaging.ImageOptions.GifOptions saveOptions = new Aspose.Imaging.ImageOptions.GifOptions();
// The number of bits required to store a color, minus 1.
saveOptions.ColorResolution = 7;
// Palette correction means that whenever image is exported to GIF the source image colors will be analyzed
// in order to build the best matching palette (in case image Palette does not exist or not specified in the options)
saveOptions.DoPaletteCorrection = true;
// Load a GIF image in a progressive way.
// An interlaced GIF doesn't display its scanlines linearly from top to bottom, but instead reorders it
// so the content of the GIF becomes clear even before it finishes loading.
saveOptions.Interlaced = true;
// Save as a lossless GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossless GIF: {0} bytes.", stream.Length);
}
// Set the maximum allowed pixel difference. If greater than zero, lossy compression will be used.
// The recommended value for optimal lossy compression is 80. 30 is very light compression, 200 is heavy.
saveOptions.MaxDiff = 80;
// Save as a lossy GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.lossy.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossy GIF: {0} bytes.", stream.Length);
}
}
//The output may look like this:
//The size of the lossless GIF: 212816 bytes.
//The size of the lossy GIF: 89726 bytes.Remarks
Resolusi warna - Jumlah bit per warna utama tersediapada gambar asli, minus 1. nilai ini mewakili ukuranSeluruh palet dari mana warna-warna dalam grafik adalahdipilih, bukan jumlah warna yang sebenarnya digunakan dalam grafis.Misalnya, jika nilai di bidang ini adalah 3, maka paletGambar asli memiliki 4 bit per warna utama yang tersedia untuk membuatnilai ini harus ditetapkan untuk menunjukkan kekayaanpalet asli, bahkan jika tidak setiap warna dari keseluruhanPalet tersedia di mesin sumber.
DoPaletteCorrection
Dapatkan atau menetapkan nilai yang menunjukkan apakah koreksi palet diterapkan.
public bool DoPaletteCorrection { get; set; }Nilai Properti
Examples
Contoh ini menunjukkan cara menyimpan gambar BMP ke format GIF menggunakan berbagai opsi.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image bmpImage = new Aspose.Imaging.FileFormats.Bmp.BmpImage(1000, 1000))
{
// Fill the entire image with the blue-yellow gradient.
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(bmpImage.Width, bmpImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Yellow);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(bmpImage);
graphics.FillRectangle(gradientBrush, bmpImage.Bounds);
Aspose.Imaging.ImageOptions.GifOptions saveOptions = new Aspose.Imaging.ImageOptions.GifOptions();
// The number of bits required to store a color, minus 1.
saveOptions.ColorResolution = 7;
// Palette correction means that whenever image is exported to GIF the source image colors will be analyzed
// in order to build the best matching palette (in case image Palette does not exist or not specified in the options)
saveOptions.DoPaletteCorrection = true;
// Load a GIF image in a progressive way.
// An interlaced GIF doesn't display its scanlines linearly from top to bottom, but instead reorders it
// so the content of the GIF becomes clear even before it finishes loading.
saveOptions.Interlaced = true;
// Save as a lossless GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossless GIF: {0} bytes.", stream.Length);
}
// Set the maximum allowed pixel difference. If greater than zero, lossy compression will be used.
// The recommended value for optimal lossy compression is 80. 30 is very light compression, 200 is heavy.
saveOptions.MaxDiff = 80;
// Save as a lossy GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.lossy.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossy GIF: {0} bytes.", stream.Length);
}
}
//The output may look like this:
//The size of the lossless GIF: 212816 bytes.
//The size of the lossy GIF: 89726 bytes.Remarks
Perbaikan palet berarti setiap kali gambar diekspor ke GIF, warna sumber gambar akan dianalisis.untuk membangun palet yang paling cocok (dalam kasus palet gambar tidak ada atau tidak ditentukan dalam opsi).Proses analisis membutuhkan waktu, namun gambar output akan memiliki palet warna yang paling cocok dan hasilnya lebih baik secara visual.
HasTrailer
Dapatkan atau menetapkan nilai yang menunjukkan apakah GIF memiliki trailer.
public bool HasTrailer { get; set; }Nilai Properti
HasTransparentColor
Dapatkan atau menetapkan nilai yang menunjukkan apakah gambar GIF memiliki warna transparan.Jika nilai pengembalian adalah Null, properti ini berlebihan oleh konteks gambar sumber.
[JsonProperty]
public bool? HasTransparentColor { get; set; }Nilai Properti
bool ?
Interlaced
Memang benar jika gambar harus terhubung.
public bool Interlaced { get; set; }Nilai Properti
Examples
Contoh ini menunjukkan cara menyimpan gambar BMP ke format GIF menggunakan berbagai opsi.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image bmpImage = new Aspose.Imaging.FileFormats.Bmp.BmpImage(1000, 1000))
{
// Fill the entire image with the blue-yellow gradient.
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(bmpImage.Width, bmpImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Yellow);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(bmpImage);
graphics.FillRectangle(gradientBrush, bmpImage.Bounds);
Aspose.Imaging.ImageOptions.GifOptions saveOptions = new Aspose.Imaging.ImageOptions.GifOptions();
// The number of bits required to store a color, minus 1.
saveOptions.ColorResolution = 7;
// Palette correction means that whenever image is exported to GIF the source image colors will be analyzed
// in order to build the best matching palette (in case image Palette does not exist or not specified in the options)
saveOptions.DoPaletteCorrection = true;
// Load a GIF image in a progressive way.
// An interlaced GIF doesn't display its scanlines linearly from top to bottom, but instead reorders it
// so the content of the GIF becomes clear even before it finishes loading.
saveOptions.Interlaced = true;
// Save as a lossless GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossless GIF: {0} bytes.", stream.Length);
}
// Set the maximum allowed pixel difference. If greater than zero, lossy compression will be used.
// The recommended value for optimal lossy compression is 80. 30 is very light compression, 200 is heavy.
saveOptions.MaxDiff = 80;
// Save as a lossy GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.lossy.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossy GIF: {0} bytes.", stream.Length);
}
}
//The output may look like this:
//The size of the lossless GIF: 212816 bytes.
//The size of the lossy GIF: 89726 bytes.IsPaletteSorted
Dapatkan atau menetapkan nilai yang menunjukkan apakah entri palet disusun.
public bool IsPaletteSorted { get; set; }Nilai Properti
LoopsCount
Mendapatkan atau menetapkan jumlah loops (Default 1 loop)
public int LoopsCount { get; set; }Nilai Properti
MaxDiff
Dapatkan atau menetapkan perbedaan piksel maksimum yang diizinkan.Jika lebih besar dari nol, kompresi kerugian akan digunakan.Nilai yang disarankan untuk kompresi kerugian optimal adalah 80. 30 adalah kompresi yang sangat ringan, 200 adalah berat.Ini bekerja dengan baik ketika hanya kerugian kecil yang diperkenalkan, dan karena pembatasan algoritma kompresi, tingkat kerugian yang sangat tinggi tidak akan memberikan banyak keuntungan.Jumlah nilai yang diperbolehkan adalah [0, 1000].
public int MaxDiff { get; set; }Nilai Properti
Examples
Contoh ini menunjukkan cara menyimpan gambar BMP ke format GIF menggunakan berbagai opsi.
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image bmpImage = new Aspose.Imaging.FileFormats.Bmp.BmpImage(1000, 1000))
{
// Fill the entire image with the blue-yellow gradient.
Aspose.Imaging.Brushes.LinearGradientBrush gradientBrush = new Aspose.Imaging.Brushes.LinearGradientBrush(
new Aspose.Imaging.Point(0, 0),
new Aspose.Imaging.Point(bmpImage.Width, bmpImage.Height),
Aspose.Imaging.Color.Blue,
Aspose.Imaging.Color.Yellow);
Aspose.Imaging.Graphics graphics = new Aspose.Imaging.Graphics(bmpImage);
graphics.FillRectangle(gradientBrush, bmpImage.Bounds);
Aspose.Imaging.ImageOptions.GifOptions saveOptions = new Aspose.Imaging.ImageOptions.GifOptions();
// The number of bits required to store a color, minus 1.
saveOptions.ColorResolution = 7;
// Palette correction means that whenever image is exported to GIF the source image colors will be analyzed
// in order to build the best matching palette (in case image Palette does not exist or not specified in the options)
saveOptions.DoPaletteCorrection = true;
// Load a GIF image in a progressive way.
// An interlaced GIF doesn't display its scanlines linearly from top to bottom, but instead reorders it
// so the content of the GIF becomes clear even before it finishes loading.
saveOptions.Interlaced = true;
// Save as a lossless GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossless GIF: {0} bytes.", stream.Length);
}
// Set the maximum allowed pixel difference. If greater than zero, lossy compression will be used.
// The recommended value for optimal lossy compression is 80. 30 is very light compression, 200 is heavy.
saveOptions.MaxDiff = 80;
// Save as a lossy GIF.
using (System.IO.Stream stream = System.IO.File.OpenWrite(dir + "output.lossy.gif"))
{
bmpImage.Save(stream, saveOptions);
System.Console.WriteLine("The size of the lossy GIF: {0} bytes.", stream.Length);
}
}
//The output may look like this:
//The size of the lossless GIF: 212816 bytes.
//The size of the lossy GIF: 89726 bytes.PixelAspectRatio
Dapatkan atau menetapkan proporsi aspek GIF pixel.
public byte PixelAspectRatio { get; set; }Nilai Properti
Remarks
Pixel Aspect Ratio - Faktor yang digunakan untuk menghitung pendekatandari aspek proporsi dari pixel dalam gambar asal. jikanilai medan tidak 0, ini pendekatan dari proporsi aspekDiperkirakan berdasarkan formula:Aspect Ratio = (Pixel Aspect Ratio + 15) / 64Pixel Aspect Ratio (Pixel Aspect Ratio) ditentukan sebagai kuotennya dariluas di atas ketinggian. rentang nilai di bidang ini memungkinkanSpesifikasi pixel yang paling lebar dari 4:1 hingga pixel tertinggi dari1:4 dalam kenaikan 1/64th.Nilai yang :0 - Tidak ada informasi proporsi aspek yang diberikan.1..255 - Nilai yang digunakan dalam pengiraan.
