JavaFX 27 · com.sun.glass.ui.monocle.EPDSettings · APIdia, the JavaDoc alternative

Field Summary

Modifier and Type	Field and Description
private static final String	BITS_PER_PIXEL Sets the frame buffer color depth and pixel format: 8 for 8-bit grayscale in the Y8 pixel format, 16 for 16-bit color in the RGB565 pixel format, or 32 for 32-bit color in the ARGB32 pixel format.
private static final int	BITS_PER_PIXEL_DEFAULT
private static final int[]	BITS_PER_PIXEL_PERMITTED
pack-priv final int	bitsPerPixel
private static final String[]	EPD_PROPERTIES
private static final String	FIX_WIDTH_Y8UR Indicates whether to work around the bug found on devices, such as the Kobo Clara HD Model N249, which require a screen width equal to the visible x-resolution, instead of the normal virtual x-resolution, when using an 8-bit, unrotated, and uninverted frame buffer in the Y8 pixel format: `true` to work around the bug; otherwise `false`.
private final boolean	fixWidthY8UR
private static final String	FLAG_ENABLE_INVERSION Sets the update flag for pixel inversion: `true` to invert the pixels of each update; otherwise `false`.
private static final String	FLAG_FORCE_MONOCHROME Sets the update flag for monochrome conversion: `true` to convert the pixels of each update to pure black and white using a 50-percent threshold; otherwise `false`.
private static final String	FLAG_USE_DITHERING_Y1 Sets the update flag for 1-bit dithering: `true` to dither each update in an 8-bit Y8 frame buffer to 1-bit black and white, if available; otherwise `false`.
private static final String	FLAG_USE_DITHERING_Y4 Sets the update flag for 4-bit dithering: `true` to dither each update in an 8-bit Y8 frame buffer to 4-bit grayscale, if available; otherwise `false`.
private final boolean	flagEnableInversion
private final boolean	flagForceMonochrome
pack-priv final int	flags
private final boolean	flagUseDitheringY1
private final boolean	flagUseDitheringY4
pack-priv final boolean	getWidthVisible
pack-priv final int	grayscale
private final PlatformLogger	logger
private static final String	NO_WAIT Indicates whether to wait for the previous update to complete before sending the next update: `true` to avoid waiting and send updates as quickly as possible; otherwise `false`.
pack-priv final boolean	noWait
private static final String	ROTATE Sets the frame buffer rotation: 0 for unrotated (UR), 1 for 90 degrees clockwise (CW), 2 for 180 degrees upside-down (UD), and 3 for 90 degrees counter-clockwise (CCW).
pack-priv final int	rotate
private static final int	ROTATE_DEFAULT
private static final int[]	ROTATIONS_PERMITTED
private static final String	WAVEFORM_MODE Sets the waveform mode used for updates: 1 for black-and-white direct update (DU), 2 for 16 levels of gray (GC16), 3 for 4 levels of gray (GC4), 4 for pure black-and-white animation (A2), and 257 for the automatic selection of waveform mode based on the number of gray levels in the update (AUTO).
private static final int	WAVEFORM_MODE_DEFAULT
private static final int[]	WAVEFORM_MODES_PERMITTED
pack-priv final int	waveformMode
private static final String	Y8_INVERTED Sets an indicator for the frame buffer grayscale value: `true` to invert the pixels of all updates when using 8-bit grayscale in the Y8 pixel format; otherwise `false`.
private final boolean	y8inverted

Access	Constructor and Description
private	EPDSettings() Creates a new EPDSettings, capturing the current values of the EPD system properties.

Modifier and Type	Method and Description
private int	Returns: the value provided for the property if it is equal to one of the permitted values; otherwise, the default value getInteger(String the property name key, int the default value def, int... a list of the permitted values for the property list) Gets an integer system property.
pack-priv static EPDSettings	Returns: a new `EPDSettings` instance newInstance() Obtains a new instance of this class with the current values of the EPD system properties.
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Field Detail

BITS_PER_PIXEL back to summary

BITS_PER_PIXEL	back to summary
private static final String BITS_PER_PIXEL Sets the frame buffer color depth and pixel format: 8 for 8-bit grayscale in the Y8 pixel format, 16 for 16-bit color in the RGB565 pixel format, or 32 for 32-bit color in the ARGB32 pixel format. The default is 32. Using the 32-bit format allows JavaFX to render directly into the Linux frame buffer and avoid the step of copying and converting each pixel from an off-screen composition buffer. Implementation Note Corresponds to the `bits_per_pixel` field of `fb_var_screeninfo` in linux/fb.h.

private static final String BITS_PER_PIXEL

Sets the frame buffer color depth and pixel format: 8 for 8-bit grayscale in the Y8 pixel format, 16 for 16-bit color in the RGB565 pixel format, or 32 for 32-bit color in the ARGB32 pixel format. The default is 32.

Using the 32-bit format allows JavaFX to render directly into the Linux frame buffer and avoid the step of copying and converting each pixel from an off-screen composition buffer.

Implementation Note

Corresponds to the bits_per_pixel field of fb_var_screeninfo in linux/fb.h.

BITS_PER_PIXEL_DEFAULT	back to summary
private static final int BITS_PER_PIXEL_DEFAULT

BITS_PER_PIXEL_PERMITTED	back to summary
private static final int[] BITS_PER_PIXEL_PERMITTED

bitsPerPixel	back to summary
pack-priv final int bitsPerPixel

EPD_PROPERTIES	back to summary
private static final String[] EPD_PROPERTIES

FIX_WIDTH_Y8UR back to summary

FIX_WIDTH_Y8UR	back to summary
private static final String FIX_WIDTH_Y8UR Indicates whether to work around the bug found on devices, such as the Kobo Clara HD Model N249, which require a screen width equal to the visible x-resolution, instead of the normal virtual x-resolution, when using an 8-bit, unrotated, and uninverted frame buffer in the Y8 pixel format: `true` to work around the bug; otherwise `false`. The default is `false`.

private static final String FIX_WIDTH_Y8UR

Indicates whether to work around the bug found on devices, such as the Kobo Clara HD Model N249, which require a screen width equal to the visible x-resolution, instead of the normal virtual x-resolution, when using an 8-bit, unrotated, and uninverted frame buffer in the Y8 pixel format: true to work around the bug; otherwise false. The default is false.

fixWidthY8UR	back to summary
private final boolean fixWidthY8UR

FLAG_ENABLE_INVERSION	back to summary
private static final String FLAG_ENABLE_INVERSION Sets the update flag for pixel inversion: `true` to invert the pixels of each update; otherwise `false`. The default is `false`. Implementation Note Corresponds to the `EPDC_FLAG_ENABLE_INVERSION` constant in linux/mxcfb.h.

FLAG_FORCE_MONOCHROME	back to summary
private static final String FLAG_FORCE_MONOCHROME Sets the update flag for monochrome conversion: `true` to convert the pixels of each update to pure black and white using a 50-percent threshold; otherwise `false`. The default is `false`. Implementation Note Corresponds to the `EPDC_FLAG_FORCE_MONOCHROME` constant in linux/mxcfb.h.

FLAG_USE_DITHERING_Y1	back to summary
private static final String FLAG_USE_DITHERING_Y1 Sets the update flag for 1-bit dithering: `true` to dither each update in an 8-bit Y8 frame buffer to 1-bit black and white, if available; otherwise `false`. The default is `false`. Implementation Note Corresponds to the `EPDC_FLAG_USE_DITHERING_Y1` constant in linux/mxcfb.h.

FLAG_USE_DITHERING_Y4	back to summary
private static final String FLAG_USE_DITHERING_Y4 Sets the update flag for 4-bit dithering: `true` to dither each update in an 8-bit Y8 frame buffer to 4-bit grayscale, if available; otherwise `false`. The default is `false`. Implementation Note Corresponds to the `EPDC_FLAG_USE_DITHERING_Y4` constant in linux/mxcfb.h.

flagEnableInversion	back to summary
private final boolean flagEnableInversion

flagForceMonochrome	back to summary
private final boolean flagForceMonochrome

flags	back to summary
pack-priv final int flags

flagUseDitheringY1	back to summary
private final boolean flagUseDitheringY1

flagUseDitheringY4	back to summary
private final boolean flagUseDitheringY4

getWidthVisible	back to summary
pack-priv final boolean getWidthVisible

grayscale	back to summary
pack-priv final int grayscale

logger	back to summary
private final PlatformLogger logger

NO_WAIT back to summary

NO_WAIT	back to summary
private static final String NO_WAIT Indicates whether to wait for the previous update to complete before sending the next update: `true` to avoid waiting and send updates as quickly as possible; otherwise `false`. The default is `false`. The number of outstanding updates is limited by the device controller to either 16 or 64 concurrent non-colliding updates, depending on the model. A value of `true` may result in errors if the maximum number of concurrent non-colliding updates is exceeded. Implementation Note Corresponds to the IOCTL call constant `MXCFB_WAIT_FOR_UPDATE_COMPLETE` in linux/mxcfb.h.

private static final String NO_WAIT

Indicates whether to wait for the previous update to complete before sending the next update: true to avoid waiting and send updates as quickly as possible; otherwise false. The default is false.

The number of outstanding updates is limited by the device controller to either 16 or 64 concurrent non-colliding updates, depending on the model. A value of true may result in errors if the maximum number of concurrent non-colliding updates is exceeded.

Implementation Note

Corresponds to the IOCTL call constant MXCFB_WAIT_FOR_UPDATE_COMPLETE in linux/mxcfb.h.

noWait	back to summary
pack-priv final boolean noWait

ROTATE back to summary

ROTATE	back to summary
private static final String ROTATE Sets the frame buffer rotation: 0 for unrotated (UR), 1 for 90 degrees clockwise (CW), 2 for 180 degrees upside-down (UD), and 3 for 90 degrees counter-clockwise (CCW). The default is 0. The unrotated and upside-down settings are in landscape mode, while the clockwise and counter-clockwise settings are in portrait. Implementation Note Corresponds to the `rotate` field of `fb_var_screeninfo` in linux/fb.h.

private static final String ROTATE

Sets the frame buffer rotation: 0 for unrotated (UR), 1 for 90 degrees clockwise (CW), 2 for 180 degrees upside-down (UD), and 3 for 90 degrees counter-clockwise (CCW). The default is 0.

The unrotated and upside-down settings are in landscape mode, while the clockwise and counter-clockwise settings are in portrait.

Implementation Note

Corresponds to the rotate field of fb_var_screeninfo in linux/fb.h.

rotate	back to summary
pack-priv final int rotate

ROTATE_DEFAULT	back to summary
private static final int ROTATE_DEFAULT

ROTATIONS_PERMITTED	back to summary
private static final int[] ROTATIONS_PERMITTED

WAVEFORM_MODE back to summary

WAVEFORM_MODE	back to summary
private static final String WAVEFORM_MODE Sets the waveform mode used for updates: 1 for black-and-white direct update (DU), 2 for 16 levels of gray (GC16), 3 for 4 levels of gray (GC4), 4 for pure black-and-white animation (A2), and 257 for the automatic selection of waveform mode based on the number of gray levels in the update (AUTO). The default is 257. Automatic selection chooses one of 1 (DU), 2 (GC16), or 3 (GC4). If the waveform mode is set to 2 (GC16), it may be upgraded to a compatible but optimized mode internal to the driver, if available. Implementation Note Corresponds to the `waveform_mode` field of `mxcfb_update_data` in linux/mxcfb.h.

private static final String WAVEFORM_MODE

Sets the waveform mode used for updates: 1 for black-and-white direct update (DU), 2 for 16 levels of gray (GC16), 3 for 4 levels of gray (GC4), 4 for pure black-and-white animation (A2), and 257 for the automatic selection of waveform mode based on the number of gray levels in the update (AUTO). The default is 257.

Automatic selection chooses one of 1 (DU), 2 (GC16), or 3 (GC4). If the waveform mode is set to 2 (GC16), it may be upgraded to a compatible but optimized mode internal to the driver, if available.

Implementation Note

Corresponds to the waveform_mode field of mxcfb_update_data in linux/mxcfb.h.

WAVEFORM_MODE_DEFAULT	back to summary
private static final int WAVEFORM_MODE_DEFAULT

WAVEFORM_MODES_PERMITTED	back to summary
private static final int[] WAVEFORM_MODES_PERMITTED

waveformMode	back to summary
pack-priv final int waveformMode

Y8_INVERTED back to summary

Y8_INVERTED	back to summary
private static final String Y8_INVERTED Sets an indicator for the frame buffer grayscale value: `true` to invert the pixels of all updates when using 8-bit grayscale in the Y8 pixel format; otherwise `false`. The default is `false`. The value is ignored when the frame buffer is not set to 8-bit grayscale in the Y8 pixel format. Implementation Note Corresponds to the `GRAYSCALE_8BIT_INVERTED` constant in linux/mxcfb.h.

private static final String Y8_INVERTED

Sets an indicator for the frame buffer grayscale value: true to invert the pixels of all updates when using 8-bit grayscale in the Y8 pixel format; otherwise false. The default is false.

The value is ignored when the frame buffer is not set to 8-bit grayscale in the Y8 pixel format.

Implementation Note

Corresponds to the GRAYSCALE_8BIT_INVERTED constant in linux/mxcfb.h.

y8inverted	back to summary
private final boolean y8inverted

pack-priv Class EPDSettings

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