Package icyllis.arc3d.sketch.shaders

Class Gradient1DShader

java.lang.Object

icyllis.arc3d.sketch.shaders.GradientShader

icyllis.arc3d.sketch.shaders.Gradient1DShader

All Implemented Interfaces:

RefCounted, Shader

Direct Known Subclasses:

AngularGradient, LinearGradient, RadialGradient

public abstract sealed class Gradient1DShader
extends GradientShader
permits LinearGradient, RadialGradient, AngularGradient

Base class for gradient colors that can be represented by a 1D function, it generates one parameter for interpolation:

grad_layout(x,y) -> float

Such as linear gradient, radial gradient, angular gradient.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Gradient1DShader.ColorTransformer

Nested classes/interfaces inherited from class icyllis.arc3d.sketch.shaders.GradientShader

GradientShader.Interpolation

Field Summary

Fields

Modifier and Type	Field	Description
protected final Matrix	mPtsToUnit
protected final int	mTileMode

Fields inherited from class icyllis.arc3d.sketch.shaders.GradientShader

kDegenerateTolerance

Fields inherited from interface icyllis.arc3d.sketch.shaders.Shader

LOCAL_MATRIX_AFTER, LOCAL_MATRIX_BEFORE, LOCAL_MATRIX_REPLACE, TILE_MODE_CLAMP, TILE_MODE_DECAL, TILE_MODE_MIRROR, TILE_MODE_REPEAT

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Gradient1DShader(float @NonNull [] inColors, @Nullable ColorSpace colorSpace, float @Nullable [] inPositions, int inColorCount, int tileMode, int interpolation, @NonNull Matrix ptsToUnit)

Method Summary

Modifier and Type	Method	Description
protected static boolean	checkGradient1D(float[] colors, float[] positions, int colorCount, int tileMode)
boolean	colorsAreOpaque()
int	getColorCount()
float[]	getColors()
@NonNull ColorSpace	getColorSpace()
@NonNull Matrixc	getGradientMatrix()
int	getInterpolation()
float	getPos(int i)
float[]	getPositions()
int	getTileMode()
boolean	isOpaque()	Returns true if the shader is guaranteed to produce only opaque colors, subject to the Paint using the shader to apply an opaque alpha value.
protected static @Nullable @SharedPtr Shader	makeDegenerateGradient(float[] colors, @Nullable ColorSpace colorSpace, float[] positions, int colorCount, int tileMode)
static void	srgb_to_hsl(int i, float[] colors, BitSet hueIsPowerless)
static void	srgb_to_hwb(int i, float[] colors, BitSet hueIsPowerless)

Methods inherited from class java.lang.Object

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

Methods inherited from interface icyllis.arc3d.sketch.shaders.Shader

isTriviallyCounted, makeWithLocalMatrix, ref, unref

Field Details

mPtsToUnit

protected final Matrix mPtsToUnit

mTileMode

protected final int mTileMode

Constructor Details

Gradient1DShader

protected Gradient1DShader(float @NonNull [] inColors,
 @Nullable ColorSpace colorSpace,
 float @Nullable [] inPositions,
 int inColorCount,
 int tileMode,
 int interpolation,
 @NonNull Matrix ptsToUnit)

Method Details

isOpaque

public boolean isOpaque()

Description copied from interface: Shader

Returns true if the shader is guaranteed to produce only opaque colors, subject to the Paint using the shader to apply an opaque alpha value. Subclasses should override this to allow some optimizations.

getColors

@VisibleForTesting
public float[] getColors()

getPositions

@VisibleForTesting
public float[] getPositions()

getPos

public float getPos(int i)

getColorSpace

public @NonNull ColorSpace getColorSpace()

getColorCount

public int getColorCount()

getInterpolation

public int getInterpolation()

getTileMode

public int getTileMode()

getGradientMatrix

public @NonNull Matrixc getGradientMatrix()

colorsAreOpaque

public boolean colorsAreOpaque()

checkGradient1D

protected static boolean checkGradient1D(float[] colors,
 float[] positions,
 int colorCount,
 int tileMode)

makeDegenerateGradient

@SharedPtr
protected static @Nullable @SharedPtr Shader makeDegenerateGradient(float[] colors,
 @Nullable ColorSpace colorSpace,
 float[] positions,
 int colorCount,
 int tileMode)

srgb_to_hsl

public static void srgb_to_hsl(int i,
 float[] colors,
 BitSet hueIsPowerless)

srgb_to_hwb

public static void srgb_to_hwb(int i,
 float[] colors,
 BitSet hueIsPowerless)