Moving color extraction classes
Fixes: 62220212
Test: make
Test: runtest -x tests/Internal/src/com/android/internal/colorextraction/ColorExtractorTest.java
Test: runtest -x tests/Internal/src/com/android/internal/colorextraction/types/TonalTest.java
Test: runtest systemui
Change-Id: I7c4cf5c40a88555e81fbad9bec2b32c55c927468
Merged-In: I7c4cf5c40a88555e81fbad9bec2b32c55c927468
diff --git a/core/java/com/android/internal/colorextraction/ColorExtractor.java b/core/java/com/android/internal/colorextraction/ColorExtractor.java
new file mode 100644
index 0000000..2608698
--- /dev/null
+++ b/core/java/com/android/internal/colorextraction/ColorExtractor.java
@@ -0,0 +1,284 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.internal.colorextraction;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.app.WallpaperColors;
+import android.app.WallpaperManager;
+import android.content.Context;
+import android.os.Trace;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.colorextraction.types.ExtractionType;
+import com.android.internal.colorextraction.types.Tonal;
+
+import java.util.ArrayList;
+
+/**
+ * Class to process wallpaper colors and generate a tonal palette based on them.
+ */
+public class ColorExtractor implements WallpaperManager.OnColorsChangedListener {
+
+ public static final int TYPE_NORMAL = 0;
+ public static final int TYPE_DARK = 1;
+ public static final int TYPE_EXTRA_DARK = 2;
+ private static final int[] sGradientTypes = new int[]{TYPE_NORMAL, TYPE_DARK, TYPE_EXTRA_DARK};
+
+ private static final String TAG = "ColorExtractor";
+
+ public static final int FALLBACK_COLOR = 0xff83888d;
+
+ private int mMainFallbackColor = FALLBACK_COLOR;
+ private int mSecondaryFallbackColor = FALLBACK_COLOR;
+ private final SparseArray<GradientColors[]> mGradientColors;
+ private final ArrayList<OnColorsChangedListener> mOnColorsChangedListeners;
+ private final Context mContext;
+ private final ExtractionType mExtractionType;
+ private WallpaperColors mSystemColors;
+ private WallpaperColors mLockColors;
+
+ public ColorExtractor(Context context) {
+ this(context, new Tonal());
+ }
+
+ @VisibleForTesting
+ public ColorExtractor(Context context, ExtractionType extractionType) {
+ mContext = context;
+ mExtractionType = extractionType;
+
+ mGradientColors = new SparseArray<>();
+ for (int which : new int[] { WallpaperManager.FLAG_LOCK, WallpaperManager.FLAG_SYSTEM}) {
+ GradientColors[] colors = new GradientColors[sGradientTypes.length];
+ mGradientColors.append(which, colors);
+ for (int type : sGradientTypes) {
+ colors[type] = new GradientColors();
+ }
+ }
+
+ mOnColorsChangedListeners = new ArrayList<>();
+ WallpaperManager wallpaperManager = mContext.getSystemService(WallpaperManager.class);
+ if (wallpaperManager == null) {
+ Log.w(TAG, "Can't listen to color changes!");
+ } else {
+ wallpaperManager.addOnColorsChangedListener(this);
+
+ // Initialize all gradients with the current colors
+ Trace.beginSection("ColorExtractor#getWallpaperColors");
+ mSystemColors = wallpaperManager.getWallpaperColors(WallpaperManager.FLAG_SYSTEM);
+ mLockColors = wallpaperManager.getWallpaperColors(WallpaperManager.FLAG_LOCK);
+
+ GradientColors[] systemColors = mGradientColors.get(
+ WallpaperManager.FLAG_SYSTEM);
+ extractInto(mSystemColors,
+ systemColors[TYPE_NORMAL],
+ systemColors[TYPE_DARK],
+ systemColors[TYPE_EXTRA_DARK]);
+
+ GradientColors[] lockColors = mGradientColors.get(WallpaperManager.FLAG_LOCK);
+ extractInto(mLockColors,
+ lockColors[TYPE_NORMAL],
+ lockColors[TYPE_DARK],
+ lockColors[TYPE_EXTRA_DARK]);
+ triggerColorsChanged(WallpaperManager.FLAG_SYSTEM
+ | WallpaperManager.FLAG_LOCK);
+ Trace.endSection();
+ }
+ }
+
+ /**
+ * Retrieve TYPE_NORMAL gradient colors considering wallpaper visibility.
+ *
+ * @param which FLAG_LOCK or FLAG_SYSTEM
+ * @return colors
+ */
+ @NonNull
+ public GradientColors getColors(int which) {
+ return getColors(which, TYPE_NORMAL);
+ }
+
+ /**
+ * Get current gradient colors for one of the possible gradient types
+ *
+ * @param which FLAG_LOCK or FLAG_SYSTEM
+ * @param type TYPE_NORMAL, TYPE_DARK or TYPE_EXTRA_DARK
+ * @return colors
+ */
+ @NonNull
+ public GradientColors getColors(int which, int type) {
+ if (type != TYPE_NORMAL && type != TYPE_DARK && type != TYPE_EXTRA_DARK) {
+ throw new IllegalArgumentException(
+ "type should be TYPE_NORMAL, TYPE_DARK or TYPE_EXTRA_DARK");
+ }
+ if (which != WallpaperManager.FLAG_LOCK && which != WallpaperManager.FLAG_SYSTEM) {
+ throw new IllegalArgumentException("which should be FLAG_SYSTEM or FLAG_NORMAL");
+ }
+ return mGradientColors.get(which)[type];
+ }
+
+ /**
+ * Get the last available WallpaperColors without forcing new extraction.
+ *
+ * @param which FLAG_LOCK or FLAG_SYSTEM
+ * @return Last cached colors
+ */
+ @Nullable
+ public WallpaperColors getWallpaperColors(int which) {
+ if (which == WallpaperManager.FLAG_LOCK) {
+ return mLockColors;
+ } else if (which == WallpaperManager.FLAG_SYSTEM) {
+ return mSystemColors;
+ } else {
+ throw new IllegalArgumentException("Invalid value for which: " + which);
+ }
+ }
+
+ @Override
+ public void onColorsChanged(WallpaperColors colors, int which) {
+ boolean changed = false;
+ if ((which & WallpaperManager.FLAG_LOCK) != 0) {
+ mLockColors = colors;
+ GradientColors[] lockColors = mGradientColors.get(WallpaperManager.FLAG_LOCK);
+ extractInto(colors, lockColors[TYPE_NORMAL], lockColors[TYPE_DARK],
+ lockColors[TYPE_EXTRA_DARK]);
+ changed = true;
+ }
+ if ((which & WallpaperManager.FLAG_SYSTEM) != 0) {
+ mSystemColors = colors;
+ GradientColors[] systemColors = mGradientColors.get(WallpaperManager.FLAG_SYSTEM);
+ extractInto(colors, systemColors[TYPE_NORMAL], systemColors[TYPE_DARK],
+ systemColors[TYPE_EXTRA_DARK]);
+ changed = true;
+ }
+
+ if (changed) {
+ triggerColorsChanged(which);
+ }
+ }
+
+ protected void triggerColorsChanged(int which) {
+ for (OnColorsChangedListener listener: mOnColorsChangedListeners) {
+ listener.onColorsChanged(this, which);
+ }
+ }
+
+ private void extractInto(WallpaperColors inWallpaperColors,
+ GradientColors outGradientColorsNormal, GradientColors outGradientColorsDark,
+ GradientColors outGradientColorsExtraDark) {
+ if (inWallpaperColors == null) {
+ applyFallback(outGradientColorsNormal);
+ applyFallback(outGradientColorsDark);
+ applyFallback(outGradientColorsExtraDark);
+ return;
+ }
+ boolean success = mExtractionType.extractInto(inWallpaperColors, outGradientColorsNormal,
+ outGradientColorsDark, outGradientColorsExtraDark);
+ if (!success) {
+ applyFallback(outGradientColorsNormal);
+ applyFallback(outGradientColorsDark);
+ applyFallback(outGradientColorsExtraDark);
+ }
+ }
+
+ private void applyFallback(GradientColors outGradientColors) {
+ outGradientColors.setMainColor(mMainFallbackColor);
+ outGradientColors.setSecondaryColor(mSecondaryFallbackColor);
+ outGradientColors.setSupportsDarkText(false);
+ }
+
+ public void destroy() {
+ WallpaperManager wallpaperManager = mContext.getSystemService(WallpaperManager.class);
+ if (wallpaperManager != null) {
+ wallpaperManager.removeOnColorsChangedListener(this);
+ }
+ }
+
+ public void addOnColorsChangedListener(@NonNull OnColorsChangedListener listener) {
+ mOnColorsChangedListeners.add(listener);
+ }
+
+ public void removeOnColorsChangedListener(@NonNull OnColorsChangedListener listener) {
+ mOnColorsChangedListeners.remove(listener);
+ }
+
+ public static class GradientColors {
+ private int mMainColor = FALLBACK_COLOR;
+ private int mSecondaryColor = FALLBACK_COLOR;
+ private boolean mSupportsDarkText;
+
+ public void setMainColor(int mainColor) {
+ mMainColor = mainColor;
+ }
+
+ public void setSecondaryColor(int secondaryColor) {
+ mSecondaryColor = secondaryColor;
+ }
+
+ public void setSupportsDarkText(boolean supportsDarkText) {
+ mSupportsDarkText = supportsDarkText;
+ }
+
+ public void set(GradientColors other) {
+ mMainColor = other.mMainColor;
+ mSecondaryColor = other.mSecondaryColor;
+ mSupportsDarkText = other.mSupportsDarkText;
+ }
+
+ public int getMainColor() {
+ return mMainColor;
+ }
+
+ public int getSecondaryColor() {
+ return mSecondaryColor;
+ }
+
+ public boolean supportsDarkText() {
+ return mSupportsDarkText;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (o == null || o.getClass() != getClass()) {
+ return false;
+ }
+ GradientColors other = (GradientColors) o;
+ return other.mMainColor == mMainColor &&
+ other.mSecondaryColor == mSecondaryColor &&
+ other.mSupportsDarkText == mSupportsDarkText;
+ }
+
+ @Override
+ public int hashCode() {
+ int code = mMainColor;
+ code = 31 * code + mSecondaryColor;
+ code = 31 * code + (mSupportsDarkText ? 0 : 1);
+ return code;
+ }
+
+ @Override
+ public String toString() {
+ return "GradientColors(" + Integer.toHexString(mMainColor) + ", "
+ + Integer.toHexString(mSecondaryColor) + ")";
+ }
+ }
+
+ public interface OnColorsChangedListener {
+ void onColorsChanged(ColorExtractor colorExtractor, int which);
+ }
+}
\ No newline at end of file
diff --git a/core/java/com/android/internal/colorextraction/drawable/GradientDrawable.java b/core/java/com/android/internal/colorextraction/drawable/GradientDrawable.java
new file mode 100644
index 0000000..500c028
--- /dev/null
+++ b/core/java/com/android/internal/colorextraction/drawable/GradientDrawable.java
@@ -0,0 +1,223 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.internal.colorextraction.drawable;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ValueAnimator;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.ColorFilter;
+import android.graphics.Paint;
+import android.graphics.PixelFormat;
+import android.graphics.RadialGradient;
+import android.graphics.Rect;
+import android.graphics.Shader;
+import android.graphics.Xfermode;
+import android.graphics.drawable.Drawable;
+import android.view.animation.DecelerateInterpolator;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.colorextraction.ColorExtractor;
+import com.android.internal.graphics.ColorUtils;
+
+/**
+ * Draws a gradient based on a Palette
+ */
+public class GradientDrawable extends Drawable {
+ private static final String TAG = "GradientDrawable";
+
+ private static final float CENTRALIZED_CIRCLE_1 = -2;
+ private static final int GRADIENT_RADIUS = 480; // in dp
+ private static final long COLOR_ANIMATION_DURATION = 2000;
+
+ private int mAlpha = 255;
+
+ private float mDensity;
+ private final Paint mPaint;
+ private final Rect mWindowBounds;
+ private final Splat mSplat;
+
+ private int mMainColor;
+ private int mSecondaryColor;
+ private ValueAnimator mColorAnimation;
+
+ public GradientDrawable(@NonNull Context context) {
+ mDensity = context.getResources().getDisplayMetrics().density;
+ mSplat = new Splat(0.50f, 1.00f, GRADIENT_RADIUS, CENTRALIZED_CIRCLE_1);
+ mWindowBounds = new Rect();
+
+ mPaint = new Paint();
+ mPaint.setStyle(Paint.Style.FILL);
+ }
+
+ public void setColors(@NonNull ColorExtractor.GradientColors colors) {
+ setColors(colors.getMainColor(), colors.getSecondaryColor(), true);
+ }
+
+ public void setColors(@NonNull ColorExtractor.GradientColors colors, boolean animated) {
+ setColors(colors.getMainColor(), colors.getSecondaryColor(), animated);
+ }
+
+ public void setColors(int mainColor, int secondaryColor, boolean animated) {
+ if (mainColor == mMainColor && secondaryColor == mSecondaryColor) {
+ return;
+ }
+
+ if (mColorAnimation != null && mColorAnimation.isRunning()) {
+ mColorAnimation.cancel();
+ }
+
+ if (animated) {
+ final int mainFrom = mMainColor;
+ final int secFrom = mSecondaryColor;
+
+ ValueAnimator anim = ValueAnimator.ofFloat(0, 1);
+ anim.setDuration(COLOR_ANIMATION_DURATION);
+ anim.addUpdateListener(animation -> {
+ float ratio = (float) animation.getAnimatedValue();
+ mMainColor = ColorUtils.blendARGB(mainFrom, mainColor, ratio);
+ mSecondaryColor = ColorUtils.blendARGB(secFrom, secondaryColor, ratio);
+ buildPaints();
+ invalidateSelf();
+ });
+ anim.addListener(new AnimatorListenerAdapter() {
+ @Override
+ public void onAnimationEnd(Animator animation, boolean isReverse) {
+ if (mColorAnimation == animation) {
+ mColorAnimation = null;
+ }
+ }
+ });
+ anim.setInterpolator(new DecelerateInterpolator());
+ anim.start();
+ mColorAnimation = anim;
+ } else {
+ mMainColor = mainColor;
+ mSecondaryColor = secondaryColor;
+ buildPaints();
+ invalidateSelf();
+ }
+ }
+
+ @Override
+ public void setAlpha(int alpha) {
+ if (alpha != mAlpha) {
+ mAlpha = alpha;
+ mPaint.setAlpha(mAlpha);
+ invalidateSelf();
+ }
+ }
+
+ @Override
+ public int getAlpha() {
+ return mAlpha;
+ }
+
+ @Override
+ public void setXfermode(@Nullable Xfermode mode) {
+ mPaint.setXfermode(mode);
+ invalidateSelf();
+ }
+
+ @Override
+ public void setColorFilter(ColorFilter colorFilter) {
+ mPaint.setColorFilter(colorFilter);
+ }
+
+ @Override
+ public ColorFilter getColorFilter() {
+ return mPaint.getColorFilter();
+ }
+
+ @Override
+ public int getOpacity() {
+ return PixelFormat.TRANSLUCENT;
+ }
+
+ public void setScreenSize(int width, int height) {
+ mWindowBounds.set(0, 0, width, height);
+ setBounds(0, 0, width, height);
+ buildPaints();
+ }
+
+ private void buildPaints() {
+ Rect bounds = mWindowBounds;
+ if (bounds.width() == 0) {
+ return;
+ }
+
+ float w = bounds.width();
+ float h = bounds.height();
+
+ float x = mSplat.x * w;
+ float y = mSplat.y * h;
+
+ float radius = mSplat.radius * mDensity;
+
+ // When we have only a single alpha gradient, we increase quality
+ // (avoiding banding) by merging the background solid color into
+ // the gradient directly
+ RadialGradient radialGradient = new RadialGradient(x, y, radius,
+ mSecondaryColor, mMainColor, Shader.TileMode.CLAMP);
+ mPaint.setShader(radialGradient);
+ }
+
+ @Override
+ public void draw(@NonNull Canvas canvas) {
+ Rect bounds = mWindowBounds;
+ if (bounds.width() == 0) {
+ throw new IllegalStateException("You need to call setScreenSize before drawing.");
+ }
+
+ // Splat each gradient
+ float w = bounds.width();
+ float h = bounds.height();
+
+ float x = mSplat.x * w;
+ float y = mSplat.y * h;
+
+ float radius = Math.max(w, h);
+ canvas.drawRect(x - radius, y - radius, x + radius, y + radius, mPaint);
+ }
+
+ @VisibleForTesting
+ public int getMainColor() {
+ return mMainColor;
+ }
+
+ @VisibleForTesting
+ public int getSecondaryColor() {
+ return mSecondaryColor;
+ }
+
+ static final class Splat {
+ final float x;
+ final float y;
+ final float radius;
+ final float colorIndex;
+
+ Splat(float x, float y, float radius, float colorIndex) {
+ this.x = x;
+ this.y = y;
+ this.radius = radius;
+ this.colorIndex = colorIndex;
+ }
+ }
+}
\ No newline at end of file
diff --git a/core/java/com/android/internal/colorextraction/types/ExtractionType.java b/core/java/com/android/internal/colorextraction/types/ExtractionType.java
new file mode 100644
index 0000000..762b54f
--- /dev/null
+++ b/core/java/com/android/internal/colorextraction/types/ExtractionType.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.internal.colorextraction.types;
+
+import android.app.WallpaperColors;
+
+import com.android.internal.colorextraction.ColorExtractor;
+
+/**
+ * Interface to allow various color extraction implementations.
+ */
+public interface ExtractionType {
+
+ /**
+ * Executes color extraction by reading WallpaperColors and setting
+ * main and secondary colors on GradientColors.
+ *
+ * Extraction is expected to happen with 3 different gradient types:
+ * Normal, with the main extracted colors
+ * Dark, with extra contrast
+ * ExtraDark, for places where GAR is mandatory, like the emergency dialer
+ *
+ * @param inWallpaperColors where to read from
+ * @param outGradientColorsNormal object that should receive normal colors
+ * @param outGradientColorsDark object that should receive dark colors
+ * @param outGradientColorsExtraDark object that should receive extra dark colors
+ * @return true if successful.
+ */
+ boolean extractInto(WallpaperColors inWallpaperColors,
+ ColorExtractor.GradientColors outGradientColorsNormal,
+ ColorExtractor.GradientColors outGradientColorsDark,
+ ColorExtractor.GradientColors outGradientColorsExtraDark);
+}
diff --git a/core/java/com/android/internal/colorextraction/types/Tonal.java b/core/java/com/android/internal/colorextraction/types/Tonal.java
new file mode 100644
index 0000000..b8ebe30
--- /dev/null
+++ b/core/java/com/android/internal/colorextraction/types/Tonal.java
@@ -0,0 +1,805 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.internal.colorextraction.types;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.app.WallpaperColors;
+import android.graphics.Color;
+import android.util.Log;
+import android.util.MathUtils;
+import android.util.Range;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.colorextraction.ColorExtractor.GradientColors;
+import com.android.internal.graphics.ColorUtils;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Implementation of tonal color extraction
+ */
+public class Tonal implements ExtractionType {
+ private static final String TAG = "Tonal";
+
+ // Used for tonal palette fitting
+ private static final float FIT_WEIGHT_H = 1.0f;
+ private static final float FIT_WEIGHT_S = 1.0f;
+ private static final float FIT_WEIGHT_L = 10.0f;
+
+ private static final boolean DEBUG = true;
+
+ // Temporary variable to avoid allocations
+ private float[] mTmpHSL = new float[3];
+
+ /**
+ * Grab colors from WallpaperColors as set them into GradientColors
+ *
+ * @param inWallpaperColors input
+ * @param outColorsNormal colors for normal theme
+ * @param outColorsDark colors for dar theme
+ * @param outColorsExtraDark colors for extra dark theme
+ * @return true if successful
+ */
+ public boolean extractInto(@NonNull WallpaperColors inWallpaperColors,
+ @NonNull GradientColors outColorsNormal, @NonNull GradientColors outColorsDark,
+ @NonNull GradientColors outColorsExtraDark) {
+
+ final List<Color> mainColors = inWallpaperColors.getMainColors();
+ final int mainColorsSize = mainColors.size();
+
+ if (mainColorsSize == 0) {
+ return false;
+ }
+ // Tonal is not really a sort, it takes a color from the extracted
+ // palette and finds a best fit amongst a collection of pre-defined
+ // palettes. The best fit is tweaked to be closer to the source color
+ // and replaces the original palette
+
+ // Get the most preeminent, non-blacklisted color.
+ Color bestColor = null;
+ final float[] hsl = new float[3];
+ for (int i = 0; i < mainColorsSize; i++) {
+ final Color color = mainColors.get(i);
+ final int colorValue = color.toArgb();
+ ColorUtils.RGBToHSL(Color.red(colorValue), Color.green(colorValue),
+ Color.blue(colorValue), hsl);
+
+ // Stop when we find a color that meets our criteria
+ if (!isBlacklisted(hsl)) {
+ bestColor = color;
+ break;
+ }
+ }
+
+ // Fail if not found
+ if (bestColor == null) {
+ return false;
+ }
+
+ int colorValue = bestColor.toArgb();
+ ColorUtils.RGBToHSL(Color.red(colorValue), Color.green(colorValue), Color.blue(colorValue),
+ hsl);
+
+ // The Android HSL definition requires the hue to go from 0 to 360 but
+ // the Material Tonal Palette defines hues from 0 to 1.
+ hsl[0] /= 360f;
+
+ // Find the palette that contains the closest color
+ TonalPalette palette = findTonalPalette(hsl[0], hsl[1]);
+ if (palette == null) {
+ Log.w(TAG, "Could not find a tonal palette!");
+ return false;
+ }
+
+ // Figure out what's the main color index in the optimal palette
+ int fitIndex = bestFit(palette, hsl[0], hsl[1], hsl[2]);
+ if (fitIndex == -1) {
+ Log.w(TAG, "Could not find best fit!");
+ return false;
+ }
+
+ // Generate the 10 colors palette by offsetting each one of them
+ float[] h = fit(palette.h, hsl[0], fitIndex,
+ Float.NEGATIVE_INFINITY, Float.POSITIVE_INFINITY);
+ float[] s = fit(palette.s, hsl[1], fitIndex, 0.0f, 1.0f);
+ float[] l = fit(palette.l, hsl[2], fitIndex, 0.0f, 1.0f);
+
+ final int textInversionIndex = h.length - 3;
+ if (DEBUG) {
+ StringBuilder builder = new StringBuilder("Tonal Palette - index: " + fitIndex +
+ ". Main color: " + Integer.toHexString(getColorInt(fitIndex, h, s, l)) +
+ "\nColors: ");
+
+ for (int i=0; i < h.length; i++) {
+ builder.append(Integer.toHexString(getColorInt(i, h, s, l)));
+ if (i < h.length - 1) {
+ builder.append(", ");
+ }
+ }
+ Log.d(TAG, builder.toString());
+ }
+
+ // Normal colors:
+ // best fit + a 2 colors offset
+ int primaryIndex = fitIndex;
+ int secondaryIndex = primaryIndex + (primaryIndex >= 2 ? -2 : 2);
+ outColorsNormal.setMainColor(getColorInt(primaryIndex, h, s, l));
+ outColorsNormal.setSecondaryColor(getColorInt(secondaryIndex, h, s, l));
+
+ // Dark colors:
+ // Stops at 4th color, only lighter if dark text is supported
+ if (fitIndex < 2) {
+ primaryIndex = 0;
+ } else if (fitIndex < textInversionIndex) {
+ primaryIndex = Math.min(fitIndex, 3);
+ } else {
+ primaryIndex = h.length - 1;
+ }
+ secondaryIndex = primaryIndex + (primaryIndex >= 2 ? -2 : 2);
+ outColorsDark.setMainColor(getColorInt(primaryIndex, h, s, l));
+ outColorsDark.setSecondaryColor(getColorInt(secondaryIndex, h, s, l));
+
+ // Extra Dark:
+ // Stay close to dark colors until dark text is supported
+ if (fitIndex < 2) {
+ primaryIndex = 0;
+ } else if (fitIndex < textInversionIndex) {
+ primaryIndex = 2;
+ } else {
+ primaryIndex = h.length - 1;
+ }
+ secondaryIndex = primaryIndex + (primaryIndex >= 2 ? -2 : 2);
+ outColorsExtraDark.setMainColor(getColorInt(primaryIndex, h, s, l));
+ outColorsExtraDark.setSecondaryColor(getColorInt(secondaryIndex, h, s, l));
+
+ final boolean supportsDarkText = fitIndex >= textInversionIndex;
+ outColorsNormal.setSupportsDarkText(supportsDarkText);
+ outColorsDark.setSupportsDarkText(supportsDarkText);
+ outColorsExtraDark.setSupportsDarkText(supportsDarkText);
+
+ if (DEBUG) {
+ Log.d(TAG, "Gradients: \n\tNormal " + outColorsNormal + "\n\tDark " + outColorsDark
+ + "\n\tExtra dark: " + outColorsExtraDark);
+ }
+
+ return true;
+ }
+
+ private int getColorInt(int fitIndex, float[] h, float[] s, float[] l) {
+ mTmpHSL[0] = fract(h[fitIndex]) * 360.0f;
+ mTmpHSL[1] = s[fitIndex];
+ mTmpHSL[2] = l[fitIndex];
+ return ColorUtils.HSLToColor(mTmpHSL);
+ }
+
+ /**
+ * Checks if a given color exists in the blacklist
+ * @param hsl float array with 3 components (H 0..360, S 0..1 and L 0..1)
+ * @return true if color should be avoided
+ */
+ private boolean isBlacklisted(float[] hsl) {
+ for (ColorRange badRange: BLACKLISTED_COLORS) {
+ if (badRange.containsColor(hsl[0], hsl[1], hsl[2])) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Offsets all colors by a delta, clamping values that go beyond what's
+ * supported on the color space.
+ * @param data what you want to fit
+ * @param v how big should be the offset
+ * @param index which index to calculate the delta against
+ * @param min minimum accepted value (clamp)
+ * @param max maximum accepted value (clamp)
+ * @return new shifted palette
+ */
+ private static float[] fit(float[] data, float v, int index, float min, float max) {
+ float[] fitData = new float[data.length];
+ float delta = v - data[index];
+
+ for (int i = 0; i < data.length; i++) {
+ fitData[i] = MathUtils.constrain(data[i] + delta, min, max);
+ }
+
+ return fitData;
+ }
+
+ /**
+ * Finds the closest color in a palette, given another HSL color
+ *
+ * @param palette where to search
+ * @param h hue
+ * @param s saturation
+ * @param l lightness
+ * @return closest index or -1 if palette is empty.
+ */
+ private static int bestFit(@NonNull TonalPalette palette, float h, float s, float l) {
+ int minErrorIndex = -1;
+ float minError = Float.POSITIVE_INFINITY;
+
+ for (int i = 0; i < palette.h.length; i++) {
+ float error =
+ FIT_WEIGHT_H * Math.abs(h - palette.h[i])
+ + FIT_WEIGHT_S * Math.abs(s - palette.s[i])
+ + FIT_WEIGHT_L * Math.abs(l - palette.l[i]);
+ if (error < minError) {
+ minError = error;
+ minErrorIndex = i;
+ }
+ }
+
+ return minErrorIndex;
+ }
+
+ @Nullable
+ private static TonalPalette findTonalPalette(float h, float s) {
+ // Fallback to a grey palette if the color is too desaturated.
+ // This avoids hue shifts.
+ if (s < 0.05f) {
+ return GREY_PALETTE;
+ }
+
+ TonalPalette best = null;
+ float error = Float.POSITIVE_INFINITY;
+
+ for (int i = 0; i < TONAL_PALETTES.length; i++) {
+ final TonalPalette candidate = TONAL_PALETTES[i];
+
+ if (h >= candidate.minHue && h <= candidate.maxHue) {
+ best = candidate;
+ break;
+ }
+
+ if (candidate.maxHue > 1.0f && h >= 0.0f && h <= fract(candidate.maxHue)) {
+ best = candidate;
+ break;
+ }
+
+ if (candidate.minHue < 0.0f && h >= fract(candidate.minHue) && h <= 1.0f) {
+ best = candidate;
+ break;
+ }
+
+ if (h <= candidate.minHue && candidate.minHue - h < error) {
+ best = candidate;
+ error = candidate.minHue - h;
+ } else if (h >= candidate.maxHue && h - candidate.maxHue < error) {
+ best = candidate;
+ error = h - candidate.maxHue;
+ } else if (candidate.maxHue > 1.0f && h >= fract(candidate.maxHue)
+ && h - fract(candidate.maxHue) < error) {
+ best = candidate;
+ error = h - fract(candidate.maxHue);
+ } else if (candidate.minHue < 0.0f && h <= fract(candidate.minHue)
+ && fract(candidate.minHue) - h < error) {
+ best = candidate;
+ error = fract(candidate.minHue) - h;
+ }
+ }
+
+ return best;
+ }
+
+ private static float fract(float v) {
+ return v - (float) Math.floor(v);
+ }
+
+ static class TonalPalette {
+ final float[] h;
+ final float[] s;
+ final float[] l;
+ final float minHue;
+ final float maxHue;
+
+ TonalPalette(float[] h, float[] s, float[] l) {
+ if (h.length != s.length || s.length != l.length) {
+ throw new IllegalArgumentException("All arrays should have the same size. h: "
+ + Arrays.toString(h) + " s: " + Arrays.toString(s) + " l: "
+ + Arrays.toString(l));
+ }
+
+ this.h = h;
+ this.s = s;
+ this.l = l;
+
+ float minHue = Float.POSITIVE_INFINITY;
+ float maxHue = Float.NEGATIVE_INFINITY;
+
+ for (float v : h) {
+ minHue = Math.min(v, minHue);
+ maxHue = Math.max(v, maxHue);
+ }
+
+ this.minHue = minHue;
+ this.maxHue = maxHue;
+ }
+ }
+
+ // Data definition of Material Design tonal palettes
+ // When the sort type is set to TONAL, these palettes are used to find
+ // a best fit. Each palette is defined as 22 HSL colors
+ private static final TonalPalette[] TONAL_PALETTES = {
+ new TonalPalette(
+ new float[] {1f, 1f, 0.991f, 0.991f, 0.9833333333333333f, 0f, 0f, 0f,
+ 0.01134380453752181f, 0.015625000000000003f, 0.024193548387096798f,
+ 0.027397260273972573f, 0.017543859649122865f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 1f, 0.8434782608695652f, 1f, 1f, 1f, 1f,
+ 1f},
+ new float[] {0.04f, 0.09f, 0.14f, 0.2f, 0.27450980392156865f,
+ 0.34901960784313724f, 0.4235294117647059f, 0.5490196078431373f,
+ 0.6254901960784314f, 0.6862745098039216f, 0.7568627450980392f,
+ 0.8568627450980393f, 0.9254901960784314f}
+ ),
+ new TonalPalette(
+ new float[] {0.638f, 0.638f, 0.6385767790262171f, 0.6301169590643275f,
+ 0.6223958333333334f, 0.6151079136690647f, 0.6065400843881856f,
+ 0.5986964618249534f, 0.5910746812386157f, 0.5833333333333334f,
+ 0.5748031496062993f, 0.5582010582010583f},
+ new float[] {1f, 1f, 1f, 1f, 0.9014084507042253f, 0.8128654970760234f,
+ 0.7979797979797981f, 0.7816593886462883f, 0.778723404255319f, 1f, 1f,
+ 1f},
+ new float[] {0.05f, 0.12f, 0.17450980392156862f, 0.2235294117647059f,
+ 0.2784313725490196f, 0.3352941176470588f, 0.388235294117647f,
+ 0.44901960784313727f, 0.5392156862745098f, 0.6509803921568628f,
+ 0.7509803921568627f, 0.8764705882352941f}
+ ),
+ new TonalPalette(
+ new float[] {0.563f, 0.569f, 0.5666f, 0.5669934640522876f, 0.5748031496062993f,
+ 0.5595238095238095f, 0.5473118279569893f, 0.5393258426966292f,
+ 0.5315955766192734f, 0.524031007751938f, 0.5154711673699016f,
+ 0.508080808080808f, 0.5f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 0.8847736625514403f, 1f, 1f,
+ 1f},
+ new float[] {0.07f, 0.12f, 0.16f, 0.2f, 0.24901960784313726f,
+ 0.27450980392156865f, 0.30392156862745096f, 0.34901960784313724f,
+ 0.4137254901960784f, 0.47647058823529415f, 0.5352941176470588f,
+ 0.6764705882352942f, 0.8f}
+ ),
+ new TonalPalette(
+ new float[] {0.508f, 0.511f, 0.508f, 0.508f, 0.5082304526748972f,
+ 0.5069444444444444f, 0.5f, 0.5f, 0.5f, 0.48724954462659376f,
+ 0.4800347222222222f, 0.4755134281200632f, 0.4724409448818897f,
+ 0.4671052631578947f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 0.8888888888888887f, 0.9242424242424242f, 1f,
+ 1f, 0.8133333333333332f, 0.7868852459016393f, 1f, 1f, 1f},
+ new float[] {0.04f, 0.06f, 0.08f, 0.12f, 0.1588235294117647f,
+ 0.21176470588235297f, 0.25882352941176473f, 0.3f, 0.34901960784313724f,
+ 0.44117647058823534f, 0.5215686274509804f, 0.5862745098039216f,
+ 0.7509803921568627f, 0.8509803921568627f}
+ ),
+ new TonalPalette(
+ new float[] {0.333f, 0.333f, 0.333f, 0.3333333333333333f, 0.3333333333333333f,
+ 0.34006734006734f, 0.34006734006734f, 0.34006734006734f,
+ 0.34259259259259256f, 0.3475783475783476f, 0.34767025089605735f,
+ 0.3467741935483871f, 0.3703703703703704f},
+ new float[] {0.70f, 0.72f, 0.69f, 0.6703296703296703f, 0.728813559322034f,
+ 0.5657142857142856f, 0.5076923076923077f, 0.3944223107569721f,
+ 0.6206896551724138f, 0.8931297709923666f, 1f, 1f, 1f},
+ new float[] {0.05f, 0.08f, 0.14f, 0.1784313725490196f, 0.23137254901960785f,
+ 0.3431372549019608f, 0.38235294117647056f, 0.49215686274509807f,
+ 0.6588235294117647f, 0.7431372549019608f, 0.8176470588235294f,
+ 0.8784313725490196f, 0.9294117647058824f}
+ ),
+ new TonalPalette(
+ new float[] {0.161f, 0.163f, 0.163f, 0.162280701754386f, 0.15032679738562088f,
+ 0.15879265091863518f, 0.16236559139784948f, 0.17443868739205526f,
+ 0.17824074074074076f, 0.18674698795180725f, 0.18692449355432778f,
+ 0.1946778711484594f, 0.18604651162790695f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+ new float[] {0.05f, 0.08f, 0.11f, 0.14901960784313725f, 0.2f,
+ 0.24901960784313726f, 0.30392156862745096f, 0.3784313725490196f,
+ 0.4235294117647059f, 0.48823529411764705f, 0.6450980392156863f,
+ 0.7666666666666666f, 0.8313725490196078f}
+ ),
+ new TonalPalette(
+ new float[] {0.108f, 0.105f, 0.105f, 0.105f, 0.10619469026548674f,
+ 0.11924686192468618f, 0.13046448087431692f, 0.14248366013071895f,
+ 0.1506024096385542f, 0.16220238095238093f, 0.16666666666666666f,
+ 0.16666666666666666f, 0.162280701754386f, 0.15686274509803924f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+ new float[] {0.17f, 0.22f, 0.28f, 0.35f, 0.44313725490196076f,
+ 0.46862745098039216f, 0.47843137254901963f, 0.5f, 0.5117647058823529f,
+ 0.5607843137254902f, 0.6509803921568628f, 0.7509803921568627f,
+ 0.8509803921568627f, 0.9f}
+ ),
+ new TonalPalette(
+ new float[] {0.036f, 0.036f, 0.036f, 0.036f, 0.03561253561253561f,
+ 0.05098039215686275f, 0.07516339869281045f, 0.09477124183006536f,
+ 0.1150326797385621f, 0.134640522875817f, 0.14640522875816991f,
+ 0.1582397003745319f, 0.15773809523809523f, 0.15359477124183002f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+ new float[] {0.19f, 0.26f, 0.34f, 0.39f, 0.4588235294117647f, 0.5f, 0.5f, 0.5f,
+ 0.5f, 0.5f, 0.5f, 0.6509803921568628f, 0.7803921568627451f, 0.9f}
+ ),
+ new TonalPalette(
+ new float[] {0.955f, 0.961f, 0.958f, 0.9596491228070175f, 0.9593837535014005f,
+ 0.9514767932489452f, 0.943859649122807f, 0.9396825396825397f,
+ 0.9395424836601307f, 0.9393939393939394f, 0.9362745098039216f,
+ 0.9754098360655739f, 0.9824561403508771f},
+ new float[] {0.87f, 0.85f, 0.85f, 0.84070796460177f, 0.8206896551724138f,
+ 0.7979797979797981f, 0.7661290322580644f, 0.9051724137931036f,
+ 1f, 1f, 1f, 1f, 1f},
+ new float[] {0.06f, 0.11f, 0.16f, 0.22156862745098038f, 0.2843137254901961f,
+ 0.388235294117647f, 0.48627450980392156f, 0.5450980392156863f,
+ 0.6f, 0.6764705882352942f, 0.8f, 0.8803921568627451f,
+ 0.9254901960784314f}
+ ),
+ new TonalPalette(
+ new float[] {0.866f, 0.855f, 0.841025641025641f, 0.8333333333333334f,
+ 0.8285256410256411f, 0.821522309711286f, 0.8083333333333333f,
+ 0.8046594982078853f, 0.8005822416302766f, 0.7842377260981912f,
+ 0.7771084337349398f, 0.7747747747747749f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f,
+ 0.737142857142857f, 0.6434108527131781f, 0.46835443037974644f},
+ new float[] {0.05f, 0.08f, 0.12745098039215685f, 0.15490196078431373f,
+ 0.20392156862745098f, 0.24901960784313726f, 0.3137254901960784f,
+ 0.36470588235294116f, 0.44901960784313727f, 0.6568627450980392f,
+ 0.7470588235294118f, 0.8450980392156863f}
+ ),
+ new TonalPalette(
+ new float[] {0.925f, 0.93f, 0.938f, 0.947f, 0.955952380952381f,
+ 0.9681069958847737f, 0.9760479041916167f, 0.9873563218390804f, 0f, 0f,
+ 0.009057971014492771f, 0.026748971193415648f,
+ 0.041666666666666616f, 0.05303030303030304f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 0.8350515463917526f, 0.6929460580912863f,
+ 0.6387665198237885f, 0.6914893617021276f, 0.7583892617449666f,
+ 0.8070175438596495f, 0.9310344827586209f, 1f, 1f},
+ new float[] {0.10f, 0.13f, 0.17f, 0.2f, 0.27450980392156865f,
+ 0.3803921568627451f, 0.4725490196078432f, 0.5549019607843138f,
+ 0.6313725490196078f, 0.707843137254902f, 0.7764705882352941f,
+ 0.8294117647058823f, 0.9058823529411765f, 0.9568627450980391f}
+ ),
+ new TonalPalette(
+ new float[] {0.733f, 0.736f, 0.744f, 0.7514619883040936f, 0.7679738562091503f,
+ 0.7802083333333333f, 0.7844311377245509f, 0.796875f,
+ 0.8165618448637316f, 0.8487179487179487f, 0.8582375478927203f,
+ 0.8562091503267975f, 0.8666666666666667f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 0.8163265306122449f, 0.6653386454183268f,
+ 0.7547169811320753f, 0.929824561403509f, 0.9558823529411766f,
+ 0.9560439560439562f, 1f, 1f},
+ new float[] {0.07f, 0.12f, 0.17f, 0.2235294117647059f, 0.3f,
+ 0.38431372549019605f, 0.492156862745098f, 0.5843137254901961f,
+ 0.6647058823529411f, 0.7333333333333334f, 0.8215686274509804f, 0.9f,
+ 0.9411764705882353f}
+ ),
+ new TonalPalette(
+ new float[] {0.6666666666666666f, 0.6666666666666666f, 0.6666666666666666f,
+ 0.6666666666666666f, 0.6666666666666666f, 0.6666666666666666f,
+ 0.6666666666666666f, 0.6666666666666666f, 0.6666666666666666f,
+ 0.6666666666666666f, 0.6666666666666666f},
+ new float[] {0.25f, 0.24590163934426232f, 0.17880794701986752f,
+ 0.14606741573033713f, 0.13761467889908252f, 0.14893617021276592f,
+ 0.16756756756756758f, 0.20312500000000017f, 0.26086956521739135f,
+ 0.29999999999999966f, 0.5000000000000004f},
+ new float[] {0.18f, 0.2392156862745098f, 0.296078431372549f,
+ 0.34901960784313724f, 0.4274509803921569f, 0.5392156862745098f,
+ 0.6372549019607843f, 0.7490196078431373f, 0.8196078431372549f,
+ 0.8823529411764706f, 0.9372549019607843f}
+ ),
+ new TonalPalette(
+ new float[] {0.938f, 0.944f, 0.952f, 0.961f, 0.9678571428571429f,
+ 0.9944812362030905f, 0f, 0f,
+ 0.0047348484848484815f, 0.00316455696202532f, 0f,
+ 0.9980392156862745f, 0.9814814814814816f, 0.9722222222222221f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 0.7023255813953488f, 0.6638655462184874f,
+ 0.6521739130434782f, 0.7719298245614035f, 0.8315789473684211f,
+ 0.6867469879518071f, 0.7264957264957265f, 0.8181818181818182f,
+ 0.8181818181818189f},
+ new float[] {0.08f, 0.13f, 0.18f, 0.23f, 0.27450980392156865f,
+ 0.4215686274509804f,
+ 0.4666666666666667f, 0.503921568627451f, 0.5529411764705883f,
+ 0.6274509803921569f, 0.6745098039215687f, 0.7705882352941176f,
+ 0.892156862745098f, 0.9568627450980391f}
+ ),
+ new TonalPalette(
+ new float[] {0.88f, 0.888f, 0.897f, 0.9052287581699346f, 0.9112021857923498f,
+ 0.9270152505446624f, 0.9343137254901961f, 0.9391534391534391f,
+ 0.9437984496124031f, 0.943661971830986f, 0.9438943894389439f,
+ 0.9426229508196722f, 0.9444444444444444f},
+ new float[] {1f, 1f, 1f, 1f, 0.8133333333333332f, 0.7927461139896375f,
+ 0.7798165137614679f, 0.7777777777777779f, 0.8190476190476191f,
+ 0.8255813953488372f, 0.8211382113821142f, 0.8133333333333336f,
+ 0.8000000000000006f},
+ new float[] {0.08f, 0.12f, 0.16f, 0.2f, 0.29411764705882354f,
+ 0.3784313725490196f, 0.42745098039215684f, 0.4764705882352941f,
+ 0.5882352941176471f, 0.6627450980392157f, 0.7588235294117647f,
+ 0.8529411764705882f, 0.9411764705882353f}
+ ),
+ new TonalPalette(
+ new float[] {0.669f, 0.680f, 0.6884057971014492f, 0.6974789915966387f,
+ 0.7079889807162534f, 0.7154471544715447f, 0.7217741935483872f,
+ 0.7274143302180687f, 0.7272727272727273f, 0.7258064516129031f,
+ 0.7252252252252251f, 0.7333333333333333f},
+ new float[] {0.81f, 0.81f, 0.8214285714285715f, 0.6878612716763006f,
+ 0.6080402010050251f, 0.5774647887323943f, 0.5391304347826086f,
+ 0.46724890829694316f, 0.4680851063829788f, 0.462686567164179f,
+ 0.45679012345678977f, 0.4545454545454551f},
+ new float[] {0.12f, 0.16f, 0.2196078431372549f, 0.33921568627450976f,
+ 0.39019607843137255f, 0.4176470588235294f, 0.45098039215686275f,
+ 0.5509803921568628f, 0.6313725490196078f, 0.7372549019607844f,
+ 0.8411764705882353f, 0.9352941176470588f}
+ ),
+ new TonalPalette(
+ new float[] {0.6470588235294118f, 0.6516666666666667f, 0.6464174454828661f,
+ 0.6441441441441442f, 0.6432748538011696f, 0.6416666666666667f,
+ 0.6402439024390243f, 0.6412429378531074f, 0.6435185185185186f,
+ 0.6428571428571429f},
+ new float[] {0.8095238095238095f, 0.6578947368421053f, 0.5721925133689839f,
+ 0.5362318840579711f, 0.5f, 0.4424778761061947f, 0.44086021505376327f,
+ 0.44360902255639095f, 0.4499999999999997f, 0.4375000000000006f},
+ new float[] {0.16470588235294117f, 0.2980392156862745f, 0.36666666666666664f,
+ 0.40588235294117647f, 0.44705882352941173f,
+ 0.5568627450980392f, 0.6352941176470588f, 0.7392156862745098f,
+ 0.8431372549019608f, 0.9372549019607843f}
+ ),
+ new TonalPalette(
+ new float[] {0.469f, 0.46732026143790845f, 0.4718614718614719f,
+ 0.4793650793650794f, 0.48071625344352614f, 0.4829683698296837f,
+ 0.484375f, 0.4841269841269842f, 0.48444444444444457f,
+ 0.48518518518518516f, 0.4907407407407408f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 0.6274509803921569f, 0.41832669322709176f,
+ 0.41899441340782106f, 0.4128440366972478f, 0.4090909090909088f},
+ new float[] {0.07f, 0.1f, 0.15098039215686274f, 0.20588235294117646f,
+ 0.2372549019607843f, 0.26862745098039215f, 0.4f, 0.5078431372549019f,
+ 0.6490196078431372f, 0.7862745098039216f, 0.9137254901960784f}
+ ),
+ new TonalPalette(
+ new float[] {0.542f, 0.5444444444444444f, 0.5555555555555556f,
+ 0.5555555555555556f, 0.553763440860215f, 0.5526315789473684f,
+ 0.5555555555555556f, 0.5555555555555555f, 0.5555555555555556f,
+ 0.5512820512820514f, 0.5666666666666667f},
+ new float[] {0.25f, 0.24590163934426232f, 0.19148936170212766f,
+ 0.1791044776119403f, 0.18343195266272191f, 0.18446601941747576f,
+ 0.1538461538461539f, 0.15625000000000003f, 0.15328467153284678f,
+ 0.15662650602409653f, 0.151515151515151f},
+ new float[] {0.05f, 0.1196078431372549f, 0.1843137254901961f,
+ 0.2627450980392157f,
+ 0.33137254901960783f, 0.403921568627451f, 0.5411764705882354f,
+ 0.6235294117647059f, 0.7313725490196079f, 0.8372549019607843f,
+ 0.9352941176470588f}
+ ),
+ new TonalPalette(
+ new float[] {0.022222222222222223f, 0.02469135802469136f, 0.031249999999999997f,
+ 0.03947368421052631f, 0.04166666666666668f,
+ 0.043650793650793655f, 0.04411764705882352f, 0.04166666666666652f,
+ 0.04444444444444459f, 0.05555555555555529f},
+ new float[] {0.33333333333333337f, 0.2783505154639175f, 0.2580645161290323f,
+ 0.25675675675675674f, 0.2528735632183908f, 0.17500000000000002f,
+ 0.15315315315315312f, 0.15189873417721522f,
+ 0.15789473684210534f, 0.15789473684210542f},
+ new float[] {0.08823529411764705f, 0.19019607843137254f, 0.2431372549019608f,
+ 0.2901960784313725f, 0.3411764705882353f, 0.47058823529411764f,
+ 0.5647058823529412f, 0.6901960784313725f, 0.8137254901960784f,
+ 0.9254901960784314f}
+ ),
+ new TonalPalette(
+ new float[] {0.027f, 0.03f, 0.038f, 0.044f, 0.050884955752212385f,
+ 0.07254901960784313f, 0.0934640522875817f,
+ 0.10457516339869281f, 0.11699346405228758f,
+ 0.1255813953488372f, 0.1268939393939394f, 0.12533333333333332f,
+ 0.12500000000000003f, 0.12777777777777777f},
+ new float[] {1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f, 1f},
+ new float[] {0.25f, 0.3f, 0.35f, 0.4f, 0.44313725490196076f, 0.5f, 0.5f, 0.5f,
+ 0.5f, 0.5784313725490196f,
+ 0.6549019607843137f, 0.7549019607843137f, 0.8509803921568627f,
+ 0.9411764705882353f}
+ )
+ };
+
+ private static final TonalPalette GREY_PALETTE = new TonalPalette(
+ new float[]{0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f},
+ new float[]{0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f},
+ new float[]{0.08f, 0.11f, 0.14901960784313725f, 0.2f, 0.2980392156862745f, 0.4f,
+ 0.4980392156862745f, 0.6196078431372549f, 0.7176470588235294f,
+ 0.8196078431372549f, 0.9176470588235294f, 0.9490196078431372f}
+ );
+
+ @SuppressWarnings("WeakerAccess")
+ @VisibleForTesting
+ public static final ColorRange[] BLACKLISTED_COLORS = new ColorRange[] {
+
+ // Red
+ new ColorRange(
+ new Range<>(0f, 20f) /* H */,
+ new Range<>(0.7f, 1f) /* S */,
+ new Range<>(0.21f, 0.79f)) /* L */,
+ new ColorRange(
+ new Range<>(0f, 20f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.355f, 0.653f)),
+
+ // Red Orange
+ new ColorRange(
+ new Range<>(20f, 40f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.28f, 0.643f)),
+ new ColorRange(
+ new Range<>(20f, 40f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.414f, 0.561f)),
+ new ColorRange(
+ new Range<>(20f, 40f),
+ new Range<>(0f, 3f),
+ new Range<>(0.343f, 0.584f)),
+
+ // Orange
+ new ColorRange(
+ new Range<>(40f, 60f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.173f, 0.349f)),
+ new ColorRange(
+ new Range<>(40f, 60f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.233f, 0.427f)),
+ new ColorRange(
+ new Range<>(40f, 60f),
+ new Range<>(0f, 0.3f),
+ new Range<>(0.231f, 0.484f)),
+
+ // Yellow 60
+ new ColorRange(
+ new Range<>(60f, 80f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.488f, 0.737f)),
+ new ColorRange(
+ new Range<>(60f, 80f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.673f, 0.837f)),
+
+ // Yellow Green 80
+ new ColorRange(
+ new Range<>(80f, 100f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.469f, 0.61f)),
+
+ // Yellow green 100
+ new ColorRange(
+ new Range<>(100f, 120f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.388f, 0.612f)),
+ new ColorRange(
+ new Range<>(100f, 120f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.424f, 0.541f)),
+
+ // Green
+ new ColorRange(
+ new Range<>(120f, 140f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.375f, 0.52f)),
+ new ColorRange(
+ new Range<>(120f, 140f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.435f, 0.524f)),
+
+ // Green Blue 140
+ new ColorRange(
+ new Range<>(140f, 160f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.496f, 0.641f)),
+
+ // Seafoam
+ new ColorRange(
+ new Range<>(160f, 180f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.496f, 0.567f)),
+
+ // Cyan
+ new ColorRange(
+ new Range<>(180f, 200f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.52f, 0.729f)),
+
+ // Blue
+ new ColorRange(
+ new Range<>(220f, 240f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.396f, 0.571f)),
+ new ColorRange(
+ new Range<>(220f, 240f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.425f, 0.551f)),
+
+ // Blue Purple 240
+ new ColorRange(
+ new Range<>(240f, 260f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.418f, 0.639f)),
+ new ColorRange(
+ new Range<>(220f, 240f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.441f, 0.576f)),
+
+ // Blue Purple 260
+ new ColorRange(
+ new Range<>(260f, 280f),
+ new Range<>(0.3f, 1f), // Bigger range
+ new Range<>(0.461f, 0.553f)),
+
+ // Fuchsia
+ new ColorRange(
+ new Range<>(300f, 320f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.484f, 0.588f)),
+ new ColorRange(
+ new Range<>(300f, 320f),
+ new Range<>(0.3f, 0.7f),
+ new Range<>(0.48f, 0.592f)),
+
+ // Pink
+ new ColorRange(
+ new Range<>(320f, 340f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.466f, 0.629f)),
+
+ // Soft red
+ new ColorRange(
+ new Range<>(340f, 360f),
+ new Range<>(0.7f, 1f),
+ new Range<>(0.437f, 0.596f))
+ };
+
+ /**
+ * Representation of an HSL color range.
+ * <ul>
+ * <li>hsl[0] is Hue [0 .. 360)</li>
+ * <li>hsl[1] is Saturation [0...1]</li>
+ * <li>hsl[2] is Lightness [0...1]</li>
+ * </ul>
+ */
+ @VisibleForTesting
+ public static class ColorRange {
+ private Range<Float> mHue;
+ private Range<Float> mSaturation;
+ private Range<Float> mLightness;
+
+ public ColorRange(Range<Float> hue, Range<Float> saturation, Range<Float> lightness) {
+ mHue = hue;
+ mSaturation = saturation;
+ mLightness = lightness;
+ }
+
+ public boolean containsColor(float h, float s, float l) {
+ if (!mHue.contains(h)) {
+ return false;
+ } else if (!mSaturation.contains(s)) {
+ return false;
+ } else if (!mLightness.contains(l)) {
+ return false;
+ }
+ return true;
+ }
+
+ public float[] getCenter() {
+ return new float[] {
+ mHue.getLower() + (mHue.getUpper() - mHue.getLower()) / 2f,
+ mSaturation.getLower() + (mSaturation.getUpper() - mSaturation.getLower()) / 2f,
+ mLightness.getLower() + (mLightness.getUpper() - mLightness.getLower()) / 2f
+ };
+ }
+
+ @Override
+ public String toString() {
+ return String.format("H: %s, S: %s, L %s", mHue, mSaturation, mLightness);
+ }
+ }
+}