Package icyllis.arc3d.sketch

Class ScalerContext

java.lang.Object

icyllis.arc3d.sketch.ScalerContext

Direct Known Subclasses:

ScalerContext_JDK

public abstract class ScalerContext
extends Object

The ScalerContext controls the rasterization with a specified typeface and rasterization options.

This class is not thread safe, even it is stateless.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ScalerContext.GlyphMetrics

Field Summary

Fields

Modifier and Type	Field	Description
protected final StrikeDesc	mDesc

Constructor Summary

Constructors

Constructor	Description
ScalerContext(Typeface typeface, StrikeDesc desc)

Method Summary

Modifier and Type	Method	Description
protected abstract void	generateImage(Glyph glyph, Object imageBase, long imageAddress)	Generates the contents of glyph.fImage.
protected abstract ScalerContext.GlyphMetrics	generateMetrics(Glyph glyph)
protected abstract boolean	generatePath(Glyph glyph, Path dst)	Sets the passed path to the glyph outline.
final void	getImage(Glyph glyph)
final byte	getMaskFormat()
final void	getPath(@NonNull Glyph glyph)
final Typeface	getTypeface()
final boolean	isLinearMetrics()
final boolean	isSubpixel()
final @NonNull Glyph	makeGlyph(int packedID)

Methods inherited from class java.lang.Object

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

Field Details

mDesc

protected final StrikeDesc mDesc

Constructor Details

ScalerContext

public ScalerContext(Typeface typeface,
 StrikeDesc desc)

Method Details

getTypeface

public final Typeface getTypeface()

getMaskFormat

public final byte getMaskFormat()

isSubpixel

public final boolean isSubpixel()

isLinearMetrics

public final boolean isLinearMetrics()

makeGlyph

public final @NonNull Glyph makeGlyph(int packedID)

getImage

public final void getImage(Glyph glyph)

getPath

public final void getPath(@NonNull Glyph glyph)

generateMetrics

protected abstract ScalerContext.GlyphMetrics generateMetrics(Glyph glyph)

generateImage

protected abstract void generateImage(Glyph glyph,
 Object imageBase,
 long imageAddress)

Generates the contents of glyph.fImage. When called, glyph.fImage will be pointing to a pre-allocated, uninitialized region of memory of size glyph.imageSize(). This method may not change glyph.fMaskFormat.

Because glyph.imageSize() will determine the size of fImage, generateMetrics will be called before generateImage.

generatePath

protected abstract boolean generatePath(Glyph glyph,
 Path dst)

Sets the passed path to the glyph outline. If this cannot be done the path is set to empty; Does not apply subpixel positioning to the path.

Returns:

false if this glyph does not have any path.