Enum BitmapCompression

Navne til: Aspose.Imaging.FileFormats.Bmp Sammensætning: Aspose.Imaging.dll (25.4.0)

Specifikere forskellige bitmap kompression metoder.

public enum BitmapCompression : uint

Fields

AlphaBitfields = 6

Det kan kun bruges med 16 og 32-bit/pixel bitmaps.

Bitfields = 3

RGB-bitfelt kan kun bruges med 16 og 32-bit/pixel bitmaps.

Dxt1 = 827611204

DXT1 kompression. Bitmap indeholder en tekstur.

Jpeg = 4

JPEG-kompression: Bitmap indeholder et JPEG-billede.

Png = 5

PNG-kompression: Bitmap indeholder et PNG-billede.

Rgb = 0

Ingen kompression.

Rle4 = 2

RLE 4-bit/pixel kompression. kan kun bruges med 4-bit/pixel bitmaps.

Rle8 = 1

RLE 8-bit/pixel kompression. kan kun bruges med 8-bit/pixel bitmaps.

Examples

Eksemplet viser, hvordan man eksporterer en BmpImage med kompressionstypen Rgb.

string sourcePath = "input.png";
                                                                                    // Load a PNG image from a file.
                                                                                    using (Image pngImage = Image.Load(sourcePath))
                                                                                    {
                                                                                        // BMP image is saved with transparency support by default, that is achieved by using the BitmapCompression.Bitfields compression method. 
                                                                                        // To save a BMP image with the Rgb compression method, the BmpOptions with the Compression property set to BitmapCompression.Rgb should be specified.
                                                                                        pngImage.Save(outputPath, new BmpOptions() { Compression = BitmapCompression.Rgb });
                                                                                    }

Eksemplet viser, hvordan man eksporterer en BmpImage fra en Png-fil mens man holder alfa-kanalen, sparer et BMP-filer med gennemsigtighed.

string sourcePath = "input.png";
                                                                                                                                         // Load a PNG image from a file.
                                                                                                                                         using (Image pngImage = Image.Load(sourcePath))
                                                                                                                                         {
                                                                                                                                             // BMP image is saved with transparency support by default. 
                                                                                                                                             // If you want to explicitly specify such mode, the BmpOptions's Compression property should be set to BitmapCompression.Bitfields.
                                                                                                                                             // The BitmapCompression.Bitfields compression method is the default compression method in the BmpOptions.
                                                                                                                                             // So the same result of exporting a Bmp image with transparency can be achieved by either one of the following ways.
                                                                                                                                             // With an implicit default options:
                                                                                                                                             pngImage.Save(outputPath);
                                                                                                                                             // With an explicit default options:
                                                                                                                                             pngImage.Save(outputPath, new BmpOptions());
                                                                                                                                             // Specifying the BitmapCompression.Bitfields compression method:
                                                                                                                                             pngImage.Save(outputPath, new BmpOptions() { Compression = BitmapCompression.Bitfields });
                                                                                                                                         }