ev3dev.hardware.display

Interface JavaFramebuffer

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable

All Known Implementing Classes:

BitFramebuffer, LinuxFramebuffer, RGBFramebuffer

public interface JavaFramebuffer
extends java.io.Closeable

Java2D-based framebuffer interface

This class provides an interface between BufferedImages and native framebuffers.

Since:

2.4.7

Method Summary

Modifier and Type	Method and Description
void	clear() Clear the hardware framebuffer.
java.awt.image.BufferedImage	createCompatibleBuffer() Create full-screen buffer.
java.awt.image.BufferedImage	createCompatibleBuffer(int width, int height) Create pixel-compatible buffer with a specified size.
java.awt.image.BufferedImage	createCompatibleBuffer(int width, int height, int stride) Create pixel-compatible buffer with a specified size and stride.
java.awt.image.BufferedImage	createCompatibleBuffer(int width, int height, int stride, byte[] backed) Create pixel-compatible buffer with a specified size and stride.
void	flushScreen(java.awt.image.BufferedImage compatible) Write full-screen buffer into the framebuffer.
DisplayInterface	getDisplay() Get the associated display manager.
int	getHeight() Query framebuffer height.
int	getStride() Query framebuffer scanline stride, e.g.
int	getWidth() Query framebuffer width.
void	restoreData() Restore original hardware framebuffer state.
void	setFlushEnabled(boolean rly) Controls whether flushScreen(BufferedImage) has effect or not.
void	storeData() Store current hardware framebuffer state.

Methods inherited from interface java.io.Closeable

close

Method Detail

getWidth

int getWidth()

Query framebuffer width.

Returns:

Screen width in pixels.

getHeight

int getHeight()

Query framebuffer height.

Returns:

Screen height in pixels.

getStride

int getStride()

Query framebuffer scanline stride, e.g. real row length in bytes.

Returns:

Screen scanline stride in bytes

createCompatibleBuffer

java.awt.image.BufferedImage createCompatibleBuffer()

Create full-screen buffer.

Returns:

BufferedImage with correct settings.

createCompatibleBuffer

java.awt.image.BufferedImage createCompatibleBuffer(int width,
                                                    int height)

Create pixel-compatible buffer with a specified size.

Parameters:

width - Requested image width.

height - Requested image height.

Returns:

BufferedImage with correct settings.

createCompatibleBuffer

java.awt.image.BufferedImage createCompatibleBuffer(int width,
                                                    int height,
                                                    int stride)

Create pixel-compatible buffer with a specified size and stride.

Parameters:

width - Requested image width.

height - Requested image height.

stride - Requested scanline stride.

Returns:

BufferedImage with correct settings.

createCompatibleBuffer

java.awt.image.BufferedImage createCompatibleBuffer(int width,
                                                    int height,
                                                    int stride,
                                                    byte[] backed)

Create pixel-compatible buffer with a specified size and stride. This buffer will be backed by existing byte array.

Parameters:

width - Requested image width.

height - Requested image height.

stride - Requested scanline stride.

Returns:

BufferedImage with correct settings.

flushScreen

void flushScreen(java.awt.image.BufferedImage compatible)

Write full-screen buffer into the framebuffer.

Parameters:

compatible - What to draw onto the screen.

setFlushEnabled

void setFlushEnabled(boolean rly)

Controls whether flushScreen(BufferedImage) has effect or not.

Parameters:

rly - Whether flushing should be enabled or not.

storeData

void storeData()

Store current hardware framebuffer state.

restoreData

void restoreData()

Restore original hardware framebuffer state.

clear

void clear()

Clear the hardware framebuffer.

getDisplay

DisplayInterface getDisplay()

Get the associated display manager.

Returns:

reference to display manager