ej.microvg.image

Class PlutovgImageGenerator

java.lang.Object

ej.microvg.image.PlutovgImageGenerator

All Implemented Interfaces:

ImageGenerator

public class PlutovgImageGenerator
extends java.lang.Object
implements ImageGenerator

The plutovg encoder.

plutovg is a software rasterizer, so unlike its two siblings this encoder has no hardware format to satisfy: a path reaches plutovg as a sequence of function calls and a gradient as a list of stops. What it writes is therefore what the backend reads with the least work, and PlutovgImageDecoder reads the same bytes back for the simulator.

Its class name is load-bearing. The converter resolves this class from the string plutovg, which the VEE Port declares in its microvg/microvg.properties.

Nested Class Summary

Nested classes/interfaces inherited from interface ej.microvg.image.ImageGenerator

ImageGenerator.Command, ImageGenerator.FillRule, ImageGenerator.Format

Constructor Summary

Constructors

Constructor and Description
PlutovgImageGenerator(ImageGenerator.Format format) Creates the vector image generator that encodes the image in the format the plutovg backend reads.

Method Summary

Modifier and Type	Method and Description
int	encodeColor(java.awt.Color color, float opacity) Encodes the GPU color from a Color and an opacity.
int	encodeCommand(ImageGenerator.Command command) Encodes the GPU command from a ImageGenerator.Command
byte[]	encodeGradient(LinearGradient gradient) Encodes a linear gradient for the GPU.
byte[]	encodePath(Path path) Encodes a path for the GPU (path header + path commands + path commands parameters).

Methods inherited from class java.lang.Object

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

Methods inherited from interface ej.microvg.image.ImageGenerator

newByteBuffer

Constructor Detail

PlutovgImageGenerator

public PlutovgImageGenerator(ImageGenerator.Format format)

Creates the vector image generator that encodes the image in the format the plutovg backend reads.

Parameters:

format - the path buffer output format requested by the VEE Port, which this generator accepts and ignores

Method Detail

encodeCommand

public int encodeCommand(ImageGenerator.Command command)

Description copied from interface: ImageGenerator

Encodes the GPU command from a ImageGenerator.Command

Specified by:

encodeCommand in interface ImageGenerator

Parameters:

command - the command to convert.

Returns:

GPU command representation.

encodeColor

public int encodeColor(java.awt.Color color,
                       float opacity)

Description copied from interface: ImageGenerator

Encodes the GPU color from a Color and an opacity.

Specified by:

encodeColor in interface ImageGenerator

Parameters:

color - the color to convert.

opacity - the opacity to apply, a value between 0f and 1f.

Returns:

GPU color representation.

encodePath

public byte[] encodePath(Path path)

Description copied from interface: ImageGenerator

Encodes a path for the GPU (path header + path commands + path commands parameters).

The Path.encode(PathData) method should be used to browse the commands of the path. These commands are encoded by ImageGenerator.encodeCommand(Command) and append to the associated path data.

Specified by:

encodePath in interface ImageGenerator

Parameters:

path - the path to encode

Returns:

the encoded path

encodeGradient

public byte[] encodeGradient(LinearGradient gradient)

Description copied from interface: ImageGenerator

Encodes a linear gradient for the GPU.

Specified by:

encodeGradient in interface ImageGenerator

Parameters:

gradient - the gradient to encode

Returns:

GPU linear gradient representation