[Lut API] expose Lut-related APIs. (fd9025d7) · Commits · e / os / android_frameworks_base

core/api/current.txt

+25 −0

Original line number	Diff line number	Diff line
		@@ -18764,6 +18764,19 @@ package android.hardware {
		field public static final int TRANSFER_UNSPECIFIED = 0; // 0x0
		}

		@FlaggedApi("android.hardware.flags.luts_api") public final class DisplayLuts {
		ctor @FlaggedApi("android.hardware.flags.luts_api") public DisplayLuts();
		method @FlaggedApi("android.hardware.flags.luts_api") public void set(@NonNull android.hardware.DisplayLuts.Entry);
		method @FlaggedApi("android.hardware.flags.luts_api") public void set(@NonNull android.hardware.DisplayLuts.Entry, @NonNull android.hardware.DisplayLuts.Entry);
		}

		@FlaggedApi("android.hardware.flags.luts_api") public static class DisplayLuts.Entry {
		ctor @FlaggedApi("android.hardware.flags.luts_api") public DisplayLuts.Entry(@NonNull float[], int, int);
		method @FlaggedApi("android.hardware.flags.luts_api") @NonNull public float[] getBuffer();
		method @FlaggedApi("android.hardware.flags.luts_api") public int getDimension();
		method @FlaggedApi("android.hardware.flags.luts_api") public int getSamplingKey();
		}

		public class GeomagneticField {
		ctor public GeomagneticField(float, float, float, long);
		method public float getDeclination();
		@@ -18825,8 +18838,19 @@ package android.hardware {
		field @FlaggedApi("android.media.codec.p210_format_support") public static final int YCBCR_P210 = 60; // 0x3c
		}

		@FlaggedApi("android.hardware.flags.luts_api") public final class LutProperties {
		method @FlaggedApi("android.hardware.flags.luts_api") public int getDimension();
		method @FlaggedApi("android.hardware.flags.luts_api") @NonNull public int[] getSamplingKeys();
		method @FlaggedApi("android.hardware.flags.luts_api") public int getSize();
		field @FlaggedApi("android.hardware.flags.luts_api") public static final int ONE_DIMENSION = 1; // 0x1
		field @FlaggedApi("android.hardware.flags.luts_api") public static final int SAMPLING_KEY_MAX_RGB = 1; // 0x1
		field @FlaggedApi("android.hardware.flags.luts_api") public static final int SAMPLING_KEY_RGB = 0; // 0x0
		field @FlaggedApi("android.hardware.flags.luts_api") public static final int THREE_DIMENSION = 3; // 0x3
		}

		@FlaggedApi("android.hardware.flags.overlayproperties_class_api") public final class OverlayProperties implements android.os.Parcelable {
		method @FlaggedApi("android.hardware.flags.overlayproperties_class_api") public int describeContents();
		method @FlaggedApi("android.hardware.flags.luts_api") @NonNull public android.hardware.LutProperties[] getLutProperties();
		method @FlaggedApi("android.hardware.flags.overlayproperties_class_api") public boolean isCombinationSupported(int, int);
		method @FlaggedApi("android.hardware.flags.overlayproperties_class_api") public boolean isMixedColorSpacesSupported();
		method @FlaggedApi("android.hardware.flags.overlayproperties_class_api") public void writeToParcel(@NonNull android.os.Parcel, int);
		@@ -53063,6 +53087,7 @@ package android.view {
		method @FlaggedApi("com.android.window.flags.sdk_desired_present_time") @NonNull public android.view.SurfaceControl.Transaction setFrameTimeline(long);
		method @Deprecated @NonNull public android.view.SurfaceControl.Transaction setGeometry(@NonNull android.view.SurfaceControl, @Nullable android.graphics.Rect, @Nullable android.graphics.Rect, int);
		method @NonNull public android.view.SurfaceControl.Transaction setLayer(@NonNull android.view.SurfaceControl, @IntRange(from=java.lang.Integer.MIN_VALUE, to=java.lang.Integer.MAX_VALUE) int);
		method @FlaggedApi("android.hardware.flags.luts_api") @NonNull public android.view.SurfaceControl.Transaction setLuts(@NonNull android.view.SurfaceControl, @Nullable android.hardware.DisplayLuts);
		method @NonNull public android.view.SurfaceControl.Transaction setOpaque(@NonNull android.view.SurfaceControl, boolean);
		method @NonNull public android.view.SurfaceControl.Transaction setPosition(@NonNull android.view.SurfaceControl, float, float);
		method @NonNull public android.view.SurfaceControl.Transaction setScale(@NonNull android.view.SurfaceControl, float, float);

core/java/android/hardware/DisplayLuts.java

+232 −54

Original line number	Diff line number	Diff line
		@@ -16,116 +16,294 @@

		package android.hardware;

		import android.annotation.FlaggedApi;
		import android.annotation.NonNull;
		import android.hardware.flags.Flags;
		import android.util.IntArray;

		import java.util.ArrayList;
		import java.util.List;

		/**
		* @hide
		* DisplayLuts provides the developers to apply Lookup Tables (Luts) to a
		* {@link android.view.SurfaceControl}. Luts provides ways to control tonemapping
		* for specific content.
		*
		* The general flow is as follows:
		* <p>
		* <img src="{@docRoot}reference/android/images/graphics/DisplayLuts.png" />
		* <figcaption style="text-align: center;">DisplayLuts flow</figcaption>
		* </p>
		*
		* @see LutProperties
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public final class DisplayLuts {
		private ArrayList<Entry> mEntries;
		private IntArray mOffsets;
		private int mTotalLength;

		private List<float[]> mLutBuffers;
		private IntArray mLutDimensions;
		private IntArray mLutSizes;
		private IntArray mLutSamplingKeys;
		private static final int LUT_LENGTH_LIMIT = 100000;

		/**
		* Create a {@link DisplayLuts} instance.
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public DisplayLuts() {
		mEntries = new ArrayList<>();
		mOffsets = new IntArray();
		mTotalLength = 0;

		mLutBuffers = new ArrayList<>();
		mLutDimensions = new IntArray();
		mLutSizes = new IntArray();
		mLutSamplingKeys = new IntArray();
		}

		@FlaggedApi(Flags.FLAG_LUTS_API)
		public static class Entry {
		private float[] mBuffer;
		private @LutProperties.Dimension int mDimension;
		private int mSize;
		private @LutProperties.SamplingKey int mSamplingKey;

		private static final int LUT_LENGTH_LIMIT = 100000;

		/**
		* Add the lut to be applied.
		* Create a Lut entry.
		*
		* @param buffer
		* @param dimension either 1D or 3D
		* @param size
		* @param samplingKey
		*/
		public void addLut(@NonNull float[] buffer, @LutProperties.Dimension int dimension,
		int size, @LutProperties.SamplingKey int samplingKey) {

		int lutLength = 0;
		if (dimension == LutProperties.ONE_DIMENSION) {
		lutLength = size;
		} else if (dimension == LutProperties.THREE_DIMENSION) {
		lutLength = size * size * size;
		} else {
		clear();
		throw new IllegalArgumentException("The dimension is either 1D or 3D!");
		* <p>
		* Noted that 1D Lut(s) are treated as gain curves.
		* For 3D Lut(s), 3D Lut(s) are used for direct color manipulations.
		* The values of 3D Lut(s) data should be normalized to the range {@code 0.0}
		* to {@code 1.0}, inclusive. And 3D Lut(s) data is organized in the order of
		* R, G, B channels.
		*
		* @param buffer The raw lut data
		* @param dimension Either 1D or 3D
		* @param samplingKey The sampling kay used for the Lut
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public Entry(@NonNull float[] buffer,
		@LutProperties.Dimension int dimension,
		@LutProperties.SamplingKey int samplingKey) {
		if (buffer == null \|\| buffer.length < 1) {
		throw new IllegalArgumentException("The buffer cannot be empty!");
		}

		if (lutLength >= LUT_LENGTH_LIMIT) {
		clear();
		if (buffer.length >= LUT_LENGTH_LIMIT) {
		throw new IllegalArgumentException("The lut length is too big to handle!");
		}

		mOffsets.add(mTotalLength);
		mTotalLength += lutLength;
		if (dimension != LutProperties.ONE_DIMENSION
		&& dimension != LutProperties.THREE_DIMENSION) {
		throw new IllegalArgumentException("The dimension should be either 1D or 3D!");
		}

		if (dimension == LutProperties.THREE_DIMENSION) {
		if (buffer.length <= 3) {
		throw new IllegalArgumentException(
		"The 3d lut size of each dimension should be over 1!");
		}
		int lengthPerChannel = buffer.length;
		if (lengthPerChannel % 3 != 0) {
		throw new IllegalArgumentException(
		"The lut buffer of 3dlut should have 3 channels!");
		}
		lengthPerChannel /= 3;

		double size = Math.cbrt(lengthPerChannel);
		if (size == (int) size) {
		mSize = (int) size;
		} else {
		throw new IllegalArgumentException(
		"Cannot get the cube root of the 3d lut buffer!");
		}
		} else {
		mSize = buffer.length;
		}

		mBuffer = buffer;
		mDimension = dimension;
		mSamplingKey = samplingKey;
		}

		/**
		* @return the dimension of the lut entry
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public int getDimension() {
		return mDimension;
		}

		/**
		* @return the size of the lut for each dimension
		* @hide
		*/
		public int getSize() {
		return mSize;
		}

		/**
		* @return the lut raw data of the lut
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public @NonNull float[] getBuffer() {
		return mBuffer;
		}

		/**
		* @return the sampling key used by the lut
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public int getSamplingKey() {
		return mSamplingKey;
		}

		mLutBuffers.add(buffer);
		mLutDimensions.add(dimension);
		mLutSizes.add(size);
		mLutSamplingKeys.add(samplingKey);
		@Override
		public String toString() {
		return "Entry{"
		+ "dimension=" + DisplayLuts.Entry.dimensionToString(getDimension())
		+ ", size(each dimension)=" + getSize()
		+ ", samplingKey=" + samplingKeyToString(getSamplingKey()) + "}";
		}

		private static String dimensionToString(int dimension) {
		switch(dimension) {
		case LutProperties.ONE_DIMENSION:
		return "ONE_DIMENSION";
		case LutProperties.THREE_DIMENSION:
		return "THREE_DIMENSION";
		default:
		return "";
		}
		}

		private static String samplingKeyToString(int key) {
		switch(key) {
		case LutProperties.SAMPLING_KEY_RGB:
		return "SAMPLING_KEY_RGB";
		case LutProperties.SAMPLING_KEY_MAX_RGB:
		return "SAMPLING_KEY_MAX_RGB";
		default:
		return "";
		}
		}
		}

		@Override
		public String toString() {
		StringBuilder sb = new StringBuilder("DisplayLuts{");
		sb.append("\n");
		for (DisplayLuts.Entry entry: mEntries) {
		sb.append(entry.toString());
		sb.append("\n");
		}
		sb.append("}");
		return sb.toString();
		}

		private void addEntry(Entry entry) {
		mEntries.add(entry);
		mOffsets.add(mTotalLength);
		mTotalLength += entry.getBuffer().length;
		}

		private void clear() {
		mTotalLength = 0;
		mOffsets.clear();
		mLutBuffers.clear();
		mLutDimensions.clear();
		mLutSamplingKeys.clear();
		mTotalLength = 0;
		mEntries.clear();
		}

		/**
		* @return the array of Lut buffers
		* Set a Lut to be applied.
		*
		* <p>Use either this or {@link #set(Entry, Entry)}. The function will
		* replace any previously set lut(s).</p>
		*
		* @param entry Either an 1D Lut or a 3D Lut
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public void set(@NonNull Entry entry) {
		if (entry == null) {
		throw new IllegalArgumentException("The entry is null!");
		}
		clear();
		addEntry(entry);
		}

		/**
		* Set Luts in order to be applied.
		*
		* <p> An 1D Lut and 3D Lut will be applied in order. Use either this or
		* {@link #set(Entry)}. The function will replace any previously set lut(s)</p>
		*
		* @param first An 1D Lut
		* @param second A 3D Lut
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public void set(@NonNull Entry first, @NonNull Entry second) {
		if (first == null \|\| second == null) {
		throw new IllegalArgumentException("The entry is null!");
		}
		if (first.getDimension() != LutProperties.ONE_DIMENSION
		\|\| second.getDimension() != LutProperties.THREE_DIMENSION) {
		throw new IllegalArgumentException("The entries should be 1D and 3D in order!");
		}
		clear();
		addEntry(first);
		addEntry(second);
		}

		/**
		* @hide
		*/
		public boolean valid() {
		return mEntries.size() > 0;
		}

		/**
		* @hide
		*/
		public float[] getLutBuffers() {
		float[] buffer = new float[mTotalLength];

		for (int i = 0; i < mLutBuffers.size(); i++) {
		float[] lutBuffer = mLutBuffers.get(i);
		for (int i = 0; i < mEntries.size(); i++) {
		float[] lutBuffer = mEntries.get(i).getBuffer();
		System.arraycopy(lutBuffer, 0, buffer, mOffsets.get(i), lutBuffer.length);
		}
		return buffer;
		}

		/**
		* @return the starting point of each lut memory region of the lut buffer
		* @hide
		*/
		public int[] getOffsets() {
		return mOffsets.toArray();
		}

		/**
		* @return the array of Lut size
		* @hide
		*/
		public int[] getLutSizes() {
		return mLutSizes.toArray();
		int[] sizes = new int[mEntries.size()];
		for (int i = 0; i < mEntries.size(); i++) {
		sizes[i] = mEntries.get(i).getSize();
		}
		return sizes;
		}

		/**
		* @return the array of Lut dimension
		* @hide
		*/
		public int[] getLutDimensions() {
		return mLutDimensions.toArray();
		int[] dimensions = new int[mEntries.size()];
		for (int i = 0; i < mEntries.size(); i++) {
		dimensions[i] = mEntries.get(i).getDimension();
		}
		return dimensions;
		}

		/**
		* @return the array of sampling key
		* @hide
		*/
		public int[] getLutSamplingKeys() {
		return mLutSamplingKeys.toArray();
		int[] samplingKeys = new int[mEntries.size()];
		for (int i = 0; i < mEntries.size(); i++) {
		samplingKeys[i] = mEntries.get(i).getSamplingKey();
		}
		return samplingKeys;
		}
		}

core/java/android/hardware/LutProperties.java

+22 −5

Original line number	Diff line number	Diff line
		@@ -16,23 +16,31 @@

		package android.hardware;

		import android.annotation.FlaggedApi;
		import android.annotation.IntDef;
		import android.annotation.NonNull;
		import android.hardware.flags.Flags;

		import java.lang.annotation.Retention;
		import java.lang.annotation.RetentionPolicy;

		/**
		* Lut properties class.
		* Provides Lut properties of the device.
		*
		* A Lut (Look-Up Table) is a pre-calculated table for color transformation.
		*
		* @hide
		* <p>
		* A Lut (Look-Up Table) is a pre-calculated table for color correction.
		* Applications may be interested in the Lut properties exposed by
		* this class to determine if the Lut(s) they select using
		* {@link android.view.SurfaceControl.Transaction#setLuts} are by the HWC.
		* </p>
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public final class LutProperties {
		private final @Dimension int mDimension;
		private final int mSize;
		private final @SamplingKey int[] mSamplingKeys;

		/** @hide */
		@Retention(RetentionPolicy.SOURCE)
		@IntDef(prefix = {"SAMPLING_KEY_"}, value = {
		SAMPLING_KEY_RGB,
		@@ -42,11 +50,14 @@ public final class LutProperties {
		}

		/** use r,g,b channel as the gain value of a Lut */
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public static final int SAMPLING_KEY_RGB = 0;

		/** use max of r,g,b channel as the gain value of a Lut */
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public static final int SAMPLING_KEY_MAX_RGB = 1;

		/** @hide */
		@Retention(RetentionPolicy.SOURCE)
		@IntDef(value = {
		ONE_DIMENSION,
		@@ -56,18 +67,22 @@ public final class LutProperties {
		}

		/** The Lut is one dimensional */
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public static final int ONE_DIMENSION = 1;

		/** The Lut is three dimensional */
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public static final int THREE_DIMENSION = 3;

		@FlaggedApi(Flags.FLAG_LUTS_API)
		public @Dimension int getDimension() {
		return mDimension;
		}

		/**
		* @return the size of the Lut.
		* @return the size of the Lut for each dimension
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		public int getSize() {
		return mSize;
		}
		@@ -75,6 +90,8 @@ public final class LutProperties {
		/**
		* @return the list of sampling keys
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		@NonNull
		public @SamplingKey int[] getSamplingKeys() {
		if (mSamplingKeys.length == 0) {
		throw new IllegalStateException("no sampling key!");

core/java/android/hardware/OverlayProperties.java

+5 −2

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@ package android.hardware;

		import android.annotation.FlaggedApi;
		import android.annotation.NonNull;
		import android.annotation.SuppressLint;
		import android.hardware.flags.Flags;
		import android.os.Parcel;
		import android.os.Parcelable;
		@@ -72,9 +73,11 @@ public final class OverlayProperties implements Parcelable {
		}

		/**
		* Gets the lut properties of the display.
		* @hide
		* Returns the lut properties of the device.
		*/
		@FlaggedApi(Flags.FLAG_LUTS_API)
		@SuppressLint("ArrayReturn")
		@NonNull
		public LutProperties[] getLutProperties() {
		if (mNativeObject == 0) {
		return null;

core/java/android/hardware/flags/overlayproperties_flags.aconfig→core/java/android/hardware/flags/flags.aconfig

+9 −0

Original line number	Diff line number	Diff line
		package: "android.hardware.flags"
		container: "system"

		flag {
		name: "luts_api"
		is_exported: true
		is_fixed_read_only: true
		namespace: "core_graphics"
		description: "public Luts related Apis"
		bug: "349667978"
		}

		flag {
		name: "overlayproperties_class_api"
		is_exported: true