ImageWriteParam for encoding images in
the BMP format.
This class allows for the specification of various parameters while writing a BMP format image file. By default, the data layout is bottom-up, such that the pixels are stored in bottom-up order, the first scanline being stored last.
The particular compression scheme to be used can be specified by using
the setCompressionType() method with the appropriate type
string. The compression scheme specified will be honored if and only if it
is compatible with the type of image being written. If the specified
compression scheme is not compatible with the type of image being written
then the IOException will be thrown by the BMP image writer.
If the compression type is not set explicitly then getCompressionType()
will return null. In this case the BMP image writer will select
a compression type that supports encoding of the given image without loss
of the color resolution.
The compression type strings and the image type(s) each supports are listed in the following table:
| Type String | Description | Image Types |
|---|---|---|
| BI_RGB | Uncompressed RLE | <= 8-bits/sample |
| BI_RLE8 | 8-bit Run Length Encoding | <= 8-bits/sample |
| BI_RLE4 | 4-bit Run Length Encoding | <= 4-bits/sample |
| BI_BITFIELDS | Packed data | 16 or 32 bits/sample |
| Modifier and Type | Field and Description |
|---|---|
| private boolean |
| Access | Constructor and Description |
|---|---|
| public | BMPImageWriteParam(Locale
a locale)Locale to be used to localize
compression type names and quality descriptions, or
null.Constructs a |
| public | BMPImageWriteParam()
Constructs an |
| Modifier and Type | Method and Description |
|---|---|
| public boolean | Returns: whether the data are written in top-down order.Returns the value of the |
| public void | setTopDown(boolean
whether the data are written in top-down order. topDown)If set, the data will be written out in a top-down manner, the first scanline being written first. |
| topDown | back to summary |
|---|---|
| private boolean topDown | |
| BMPImageWriteParam | back to summary |
|---|---|
| public BMPImageWriteParam(Locale locale) Constructs a
| |
| BMPImageWriteParam | back to summary |
|---|---|
| public BMPImageWriteParam() Constructs an | |
| isTopDown | back to summary |
|---|---|
| public boolean isTopDown() Returns the value of the
| |
| setTopDown | back to summary |
|---|---|
| public void setTopDown(boolean topDown) If set, the data will be written out in a top-down manner, the first scanline being written first.
| |