com.aspose.imaging.fileformats.bmp

Class BitmapCompression

java.lang.Object

com.aspose.ms.System.ValueType<com.aspose.ms.System.Enum>

com.aspose.ms.System.Enum

com.aspose.imaging.fileformats.bmp.BitmapCompression

public final class BitmapCompression
extends com.aspose.ms.System.Enum

Specifies different bitmap compression methods.

Code example:

The example shows how to export a BmpImage from a Png file while keeping the alpha channel, save a Bmp file with transparency.

String sourcePath = "input.png";
String outputPathPng = "output.png";
String outputPathBmp = "output.bmp";
// Load a PNG image from a file.
try (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(outputPathPng);
    // With an explicit default options:
    pngImage.save(outputPathBmp, new BmpOptions());
    // Specifying the BitmapCompression.Bitfields compression method:
    pngImage.save(outputPathBmp, new BmpOptions() {{ setCompression(BitmapCompression.Bitfields); }});
}

Nested Class Summary

Nested classes/interfaces inherited from class com.aspose.ms.System.Enum

com.aspose.ms.System.Enum.AbstractEnum, com.aspose.ms.System.Enum.FlaggedEnum, com.aspose.ms.System.Enum.ObjectEnum, com.aspose.ms.System.Enum.SimpleEnum

Field Summary

Fields

Modifier and Type	Field and Description
static long	AlphaBitfields RGBA bit fields.
static long	Bitfields RGB bit fields.
static long	Dxt1 DXT1 compression.
static long	Jpeg JPEG compression.
static long	Png PNG compression.
static long	Rgb No compression.
static long	Rle4 RLE 4-bit/pixel compression.
static long	Rle8 RLE 8-bit/pixel compression.

Fields inherited from class com.aspose.ms.System.Enum

EnumSeparatorCharArray

Method Summary

Methods inherited from class com.aspose.ms.System.Enum

Clone, CloneTo, format, format, get_Caption, get_Value, getName, getName, getNames, getNames, getNames, getUnderlyingType, getUnderlyingType, getValue, getValues, getValues, getValues, isDefined, isDefined, isDefined, isDefined, isDefined, parse, parse, parse, parse, register, toObject, toString, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

Rgb

public static final long Rgb

No compression.

See Also:

Constant Field Values

Rle8

public static final long Rle8

RLE 8-bit/pixel compression. Can be used only with 8-bit/pixel bitmaps.

See Also:

Constant Field Values

Rle4

public static final long Rle4

RLE 4-bit/pixel compression. Can be used only with 4-bit/pixel bitmaps.

See Also:

Constant Field Values

Bitfields

public static final long Bitfields

RGB bit fields. Can be used only with 16 and 32-bit/pixel bitmaps.

See Also:

Constant Field Values

Jpeg

public static final long Jpeg

JPEG compression. The bitmap contains a JPEG image.

See Also:

Constant Field Values

Png

public static final long Png

PNG compression. The bitmap contains a PNG image.

See Also:

Constant Field Values

AlphaBitfields

public static final long AlphaBitfields

RGBA bit fields. Can be used only with 16 and 32-bit/pixel bitmaps.

See Also:

Constant Field Values

Dxt1

public static final long Dxt1

DXT1 compression. The bitmap contains a texture.

See Also:

Constant Field Values