com.googlecode.leptonica.android

Class Rotate

com.googlecode.leptonica.android.Rotate

public class Rotate

Field Detail

ROTATE_QUALITY

public static boolean ROTATE_QUALITY

Default rotation quality is high.

See Also:

Constant Field Values

Method Detail

rotate

public static Pix rotate(Pix pixs,
                         float degrees)

Performs rotation using the default parameters.

Parameters:

pixs - The source pix.

degrees - The number of degrees to rotate; clockwise is positive.

Returns:

org.jetbrains.dokka.NodeRenderContent@5a6dd28b: the rotated source image

rotate

public static Pix rotate(Pix pixs,
                         float degrees,
                         boolean quality)

Performs rotation with resizing using the default parameters.

Parameters:

pixs - The source pix.

degrees - The number of degrees to rotate; clockwise is positive.

quality - Whether to use high-quality rotation.

Returns:

org.jetbrains.dokka.NodeRenderContent@6a5346d9: the rotated source image

rotate

public static Pix rotate(Pix pixs,
                         float degrees,
                         boolean quality,
                         boolean resize)

Performs basic image rotation about the center.

Notes:

1. Rotation is about the center of the image.
2. For very small rotations, just return a clone.
3. Rotation brings either white or black pixels in from outside the image.
4. Above 20 degrees, if rotation by shear is requested, we rotate by sampling.
5. Colormaps are removed for rotation by area map and shear.
6. The dest can be expanded so that no image pixels are lost. To invoke expansion, input the original width and height. For repeated rotation, use of the original width and height allows the expansion to stop at the maximum required size, which is a square with side = sqrt(w*w + h*h).

Parameters:

pixs - The source pix.

degrees - The number of degrees to rotate; clockwise is positive.

quality - Whether to use high-quality rotation.

resize - Whether to expand the output so that no pixels are lost. Note: 1bpp images are always resized when quality is true.

Returns:

org.jetbrains.dokka.NodeRenderContent@7742ffa: the rotated source image

rotateOrth

public static Pix rotateOrth(Pix pixs,
                             @IntRange
                             int quads)

Performs top-level rotation by multiples of 90 degrees.

Parameters:

pixs - The source pix (all depths)

quads - 0-3; number of 90 degree cw rotations

Returns:

org.jetbrains.dokka.NodeRenderContent@31b35119: the rotated source image