Enum BitmapCompression

nazivni prostor: Aspose.Imaging.FileFormats.Bmp Sastav: Aspose.Imaging.dll (25.4.0)

Postoje različite metode kompresije bitmap-a.

public enum BitmapCompression : uint

Fields

AlphaBitfields = 6

RGBA bit polja. može se koristiti samo s 16 i 32-bit/pixel bitmaps.

Bitfields = 3

RGB bit polja. može se koristiti samo s 16 i 32-bit/pixel bitmaps.

Dxt1 = 827611204

DXT1 kompresija. bitmap sadrži teksturu.

Jpeg = 4

JPEG kompresija. bitmap sadrži JPEG sliku.

Png = 5

PNG kompresija. bitmap sadrži PNG sliku.

Rgb = 0

Nema kompresije

Rle4 = 2

RLE 4 bit/pixel kompresija. može se koristiti samo s 4 bit/pixel bitmaps.

Rle8 = 1

Kompresija RLE 8 bit/pixel. može se koristiti samo s 8-bit/pixel bitmaps.

Examples

Primjer pokazuje kako izvoziti BmpImage s tipom Rgb kompresije.

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 });
                                                                                    }

Primjer prikazuje kako izvoziti BmpImage iz Png datoteke dok čuvate alfa kanal, sačuvajući bmp dosje s transparentnošću.

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 });
                                                                                                                                         }