| /* |
| * Copyright (C) 2016 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.server.display; |
| |
| import android.opengl.Matrix; |
| import android.os.IBinder; |
| import android.os.Parcel; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| import com.android.internal.annotations.GuardedBy; |
| |
| import java.util.Arrays; |
| |
| /** |
| * Manager for applying color transformations to the display. |
| */ |
| public class DisplayTransformManager { |
| |
| private static final String TAG = "DisplayTransformManager"; |
| |
| /** |
| * Color transform level used by Night display to tint the display red. |
| */ |
| public static final int LEVEL_COLOR_MATRIX_NIGHT_DISPLAY = 100; |
| /** |
| * Color transform level used by A11y services to make the display monochromatic. |
| */ |
| public static final int LEVEL_COLOR_MATRIX_GRAYSCALE = 200; |
| /** |
| * Color transform level used by A11y services to invert the display colors. |
| */ |
| public static final int LEVEL_COLOR_MATRIX_INVERT_COLOR = 300; |
| |
| private static final int SURFACE_FLINGER_TRANSACTION_COLOR_MATRIX = 1015; |
| private static final int SURFACE_FLINGER_TRANSACTION_DALTONIZER = 1014; |
| |
| /** |
| * Map of level -> color transformation matrix. |
| */ |
| @GuardedBy("mColorMatrix") |
| private final SparseArray<float[]> mColorMatrix = new SparseArray<>(3); |
| /** |
| * Temporary matrix used internally by {@link #computeColorMatrixLocked()}. |
| */ |
| @GuardedBy("mColorMatrix") |
| private final float[][] mTempColorMatrix = new float[2][16]; |
| |
| /** |
| * Lock used for synchronize access to {@link #mDaltonizerMode}. |
| */ |
| private final Object mDaltonizerModeLock = new Object(); |
| @GuardedBy("mDaltonizerModeLock") |
| private int mDaltonizerMode = -1; |
| |
| /* package */ DisplayTransformManager() { |
| } |
| |
| /** |
| * Returns a copy of the color transform matrix set for a given level. |
| */ |
| public float[] getColorMatrix(int key) { |
| synchronized (mColorMatrix) { |
| final float[] value = mColorMatrix.get(key); |
| return value == null ? null : Arrays.copyOf(value, value.length); |
| } |
| } |
| |
| /** |
| * Sets and applies a current color transform matrix for a given level. |
| * <p> |
| * Note: all color transforms are first composed to a single matrix in ascending order based |
| * on level before being applied to the display. |
| * |
| * @param level the level used to identify and compose the color transform (low -> high) |
| * @param value the 4x4 color transform matrix (in column-major order), or {@code null} to |
| * remove the color transform matrix associated with the provided level |
| */ |
| public void setColorMatrix(int level, float[] value) { |
| if (value != null && value.length != 16) { |
| throw new IllegalArgumentException("Expected length: 16 (4x4 matrix)" |
| + ", actual length: " + value.length); |
| } |
| |
| synchronized (mColorMatrix) { |
| final float[] oldValue = mColorMatrix.get(level); |
| if (!Arrays.equals(oldValue, value)) { |
| if (value == null) { |
| mColorMatrix.remove(level); |
| } else if (oldValue == null) { |
| mColorMatrix.put(level, Arrays.copyOf(value, value.length)); |
| } else { |
| System.arraycopy(value, 0, oldValue, 0, value.length); |
| } |
| |
| // Update the current color transform. |
| applyColorMatrix(computeColorMatrixLocked()); |
| } |
| } |
| } |
| |
| /** |
| * Returns the composition of all current color matrices, or {@code null} if there are none. |
| */ |
| @GuardedBy("mColorMatrix") |
| private float[] computeColorMatrixLocked() { |
| final int count = mColorMatrix.size(); |
| if (count == 0) { |
| return null; |
| } |
| |
| final float[][] result = mTempColorMatrix; |
| Matrix.setIdentityM(result[0], 0); |
| for (int i = 0; i < count; i++) { |
| float[] rhs = mColorMatrix.valueAt(i); |
| Matrix.multiplyMM(result[(i + 1) % 2], 0, result[i % 2], 0, rhs, 0); |
| } |
| return result[count % 2]; |
| } |
| |
| /** |
| * Returns the current Daltonization mode. |
| */ |
| public int getDaltonizerMode() { |
| synchronized (mDaltonizerModeLock) { |
| return mDaltonizerMode; |
| } |
| } |
| |
| /** |
| * Sets the current Daltonization mode. This adjusts the color space to correct for or simulate |
| * various types of color blindness. |
| * |
| * @param mode the new Daltonization mode, or -1 to disable |
| */ |
| public void setDaltonizerMode(int mode) { |
| synchronized (mDaltonizerModeLock) { |
| if (mDaltonizerMode != mode) { |
| mDaltonizerMode = mode; |
| applyDaltonizerMode(mode); |
| } |
| } |
| } |
| |
| /** |
| * Propagates the provided color transformation matrix to the SurfaceFlinger. |
| */ |
| private static void applyColorMatrix(float[] m) { |
| final IBinder flinger = ServiceManager.getService("SurfaceFlinger"); |
| if (flinger != null) { |
| final Parcel data = Parcel.obtain(); |
| data.writeInterfaceToken("android.ui.ISurfaceComposer"); |
| if (m != null) { |
| data.writeInt(1); |
| for (int i = 0; i < 16; i++) { |
| data.writeFloat(m[i]); |
| } |
| } else { |
| data.writeInt(0); |
| } |
| try { |
| flinger.transact(SURFACE_FLINGER_TRANSACTION_COLOR_MATRIX, data, null, 0); |
| } catch (RemoteException ex) { |
| Slog.e(TAG, "Failed to set color transform", ex); |
| } finally { |
| data.recycle(); |
| } |
| } |
| } |
| |
| /** |
| * Propagates the provided Daltonization mode to the SurfaceFlinger. |
| */ |
| private static void applyDaltonizerMode(int mode) { |
| final IBinder flinger = ServiceManager.getService("SurfaceFlinger"); |
| if (flinger != null) { |
| final Parcel data = Parcel.obtain(); |
| data.writeInterfaceToken("android.ui.ISurfaceComposer"); |
| data.writeInt(mode); |
| try { |
| flinger.transact(SURFACE_FLINGER_TRANSACTION_DALTONIZER, data, null, 0); |
| } catch (RemoteException ex) { |
| Slog.e(TAG, "Failed to set Daltonizer mode", ex); |
| } finally { |
| data.recycle(); |
| } |
| } |
| } |
| } |