android 画图软件源码 markers-for-android

/* * Copyright (C) 2012 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.google.android.apps.markers; import java.util.ArrayList; import android.annotation.SuppressLint; import android.app.ActivityManager; import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Paint.Style; import android.graphics.Path; import android.graphics.PathMeasure; import android.graphics.Point; import android.graphics.PointF; import android.graphics.PorterDuff; import android.graphics.PorterDuffColorFilter; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; import android.graphics.Region; import android.graphics.Region.Op; import android.os.Build; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.View; import org.dsandler.apps.markers.R; public class Slate extends View { static final boolean DEBUG = false; static final String TAG = "Slate"; public static final boolean HWLAYER = true; public static final boolean SWLAYER = false; public static final boolean FANCY_INVALIDATES = false; // doesn't work public static final boolean INVALIDATE_ALL_THE_THINGS = true; // invalidate() every frame public static final int FLAG_DEBUG_STROKES = 1; public static final int FLAG_DEBUG_PRESSURE = 1 << 1; public static final int FLAG_DEBUG_INVALIDATES = 1 << 2; public static final int FLAG_DEBUG_TILES = 1 << 3; public static final int FLAG_DEBUG_EVERYTHING = ~0; public static final int MAX_POINTERS = 10; static final int DENSITY = 1; private static final int SMOOTHING_FILTER_WLEN = 6; private static final float SMOOTHING_FILTER_POS_DECAY = 0.65f; private static final float SMOOTHING_FILTER_PRESSURE_DECAY = 0.9f; private static final int FIXED_DIMENSION = 0; // 1024; private static final float INVALIDATE_PADDING = 4.0f; public static final boolean ASSUME_STYLUS_CALIBRATED = true; // keep these in sync with penType in values/attrs.xml public static final int TYPE_WHITEBOARD = 0; public static final int TYPE_FELTTIP = 1; public static final int TYPE_AIRBRUSH = 2; public static final int TYPE_FOUNTAIN_PEN = 3; public static final int SHAPE_CIRCLE = 0; public static final int SHAPE_SQUARE = 1; // public static final int SHAPE_BITMAP_CIRCLE = 2; public static final int SHAPE_BITMAP_AIRBRUSH = 3; public static final int SHAPE_FOUNTAIN_PEN = 4; private float mPressureExponent = 2.0f; private float mRadiusMin; private float mRadiusMax; int mDebugFlags = 0; private TiledBitmapCanvas mTiledCanvas; private final Paint mDebugPaints[] = new Paint[10]; private Bitmap mPendingPaintBitmap; // private Bitmap mCircleBits; // private Rect mCircleBitsFrame; private Bitmap mAirbrushBits; private Rect mAirbrushBitsFrame; private Bitmap mFountainPenBits; private Rect mFountainPenBitsFrame; private PressureCooker mPressureCooker; private boolean mZoomMode; private boolean mEmpty; private Region mDirtyRegion = new Region(); private Paint mBlitPaint; private Paint mWorkspacePaint; private Matrix mZoomMatrix = new Matrix(); private Matrix mZoomMatrixInv = new Matrix(); private float mPanX = 0f, mPanY = 0f; private int mMemClass; private boolean mLowMem; public interface SlateListener { void strokeStarted(); void strokeEnded(); } private class MarkersPlotter implements SpotFilter.Plotter { // Plotter receives pointer coordinates and draws them. // It implements the necessary interface to receive filtered Spots from the SpotFilter. // It hands off the drawing command to the renderer. private SpotFilter mCoordBuffer; private SmoothStroker mRenderer; private float mLastPressure = -1f; private int mLastTool = 0; final float[] mTmpPoint = new float[2]; public MarkersPlotter() { mCoordBuffer = new SpotFilter(SMOOTHING_FILTER_WLEN, SMOOTHING_FILTER_POS_DECAY, SMOOTHING_FILTER_PRESSURE_DECAY, this); mRenderer = new SmoothStroker(); } // final Rect tmpDirtyRect = new Rect(); @Override public void plot(Spot s) { final float pressureNorm; if (ASSUME_STYLUS_CALIBRATED && s.tool == MotionEvent.TOOL_TYPE_STYLUS) { pressureNorm = s.pressure; } else { pressureNorm = mPressureCooker.getAdjustedPressure(s.pressure); } final float radius = lerp(mRadiusMin, mRadiusMax, (float) Math.pow(pressureNorm, mPressureExponent)); mTmpPoint[0] = s.x - mPanX; mTmpPoint[1] = s.y - mPanY; mZoomMatrixInv.mapPoints(mTmpPoint); final RectF dirtyF = mRenderer.strokeTo(mTiledCanvas, mTmpPoint[0], mTmpPoint[1], radius); dirty(dirtyF); // dirtyF.roundOut(tmpDirtyRect); // tmpDirtyRect.inset((int)-INVALIDATE_PADDING,(int)-INVALIDATE_PADDING); // invalidate(tmpDirtyRect); } public void setPenColor(int color) { mRenderer.setPenColor(color); } public void finish(long time) { mLastPressure = -1f; mCoordBuffer.finish(); mRenderer.reset(); } // public void addCoords(MotionEvent.PointerCoords pt, long time) { // mCoordBuffer.add(pt, time); // mLastPressure = pt.pressure; // } public void add(Spot s) { mCoordBuffer.add(s); mLastPressure = s.pressure; mLastTool = s.tool; } // public float getRadius() { // return mRenderer.getRadius(); // } public float getLastPressure() { return mLastPressure; } public int getLastTool() { return mLastTool; } public void setPenType(int shape) { mRenderer.setPenType(shape); } } private class SmoothStroker { // The renderer. Given a stream of filtered points, converts it into draw calls. private float mLastX = 0, mLastY = 0, mLastLen = 0, mLastR = -1; private float mTan[] = new float[2]; private int mPenColor; private int mPenType; private int mShape = SHAPE_CIRCLE; // SHAPE_BITMAP_AIRBRUSH; private Path mWorkPath = new Path(); private PathMeasure mWorkPathMeasure = new PathMeasure(); private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); int mInkDensity = 0xff; // set to 0x20 or so for a felt-tip look, 0xff for traditional Markers public SmoothStroker() {