package com.zql.android.led;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.support.annotation.ColorInt;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewTreeObserver;
import java.util.concurrent.Executors;
/**
* Created by scott on 2017/6/14.
*/
public class LEDView extends SurfaceView implements SurfaceHolder.Callback,Runnable{
private SurfaceHolder mHolder;
private Handler mHandler;
private HandlerThread mThread;
private String mLEDStr ="";
private int mLEDHight = 0, mLEDWidth = 0;
private final int kFPS = 1000/20;
private TextPaint mTextPaint ;
private int kTextSize = 30;
private int kRawBitmapHight = 40;
private int mLEDColor = Color.parseColor("#EC3A36");
private int kTextBaseLine = kRawBitmapHight/2 + kTextSize/2 - kTextSize/10;
private LEDData mLEDData;
private long mT1,mT2,mTD;
private boolean mIsDestory = false;
private final String kSpace = "";
public LEDView(Context context) {
this(context,null);
}
public LEDView(Context context, AttributeSet attrs) {
this(context,attrs,0);
}
public LEDView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
public void setLED(String str ,@ColorInt int ledColor, int ledTextSize,int ledPixel){
if(str == null || str.trim().length() == 0){
mLEDStr = kSpace + "Hello LED \uD83D\uDE00";
}else {
mLEDStr = kSpace + str;
}
mLEDColor = ledColor;
if(ledTextSize > 0){
kTextSize = ledTextSize;
}
if(ledPixel>0){
kRawBitmapHight = ledPixel;
}
mLEDData = null;
makeRawBitmap();
}
public void setLEDContent(String content){
if(content == null || content.trim().length() == 0){
mLEDStr = kSpace + "Hello LED \uD83D\uDE00";
}else {
mLEDStr = kSpace+content;
}
mLEDData = null;
makeRawBitmap();
}
public void setLEDTextColor(int color){
mLEDColor = color;
mLEDData = null;
makeRawBitmap();
}
public void setLEDSize(int size){
kRawBitmapHight = size;
mLEDData = null;
makeRawBitmap();
}
public void setLEDTextSize(int size){
kTextSize = size;
mLEDData = null;
makeRawBitmap();
}
public int getLEDColor(){
return mLEDColor;
}
private void init(){
mHolder = getHolder();
mHolder.addCallback(this);
mThread = new HandlerThread("led-looper");
mThread.start();
mHandler = new Handler(mThread.getLooper());
mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
mLEDHight = getWidth();
mLEDWidth = getHeight();
Log.d("scott"," led size " + " h : " + mLEDHight + " w : " + mLEDWidth);
getViewTreeObserver().removeOnPreDrawListener(this);
return false;
}
});
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
Log.d("scott"," surface creates");
mIsDestory = false;
if(mLEDData == null){
mHandler.postDelayed(this,kFPS);
setLED(mLEDStr,mLEDColor,kTextSize,kRawBitmapHight);
}else {
mHandler.postDelayed(this,kFPS);
}
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i1, int i2) {
Log.d("scott"," surface Changed");
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
Log.d("scott"," surface destroy");
mIsDestory = true;
}
private void makeRawBitmap(){
if(mLEDStr == null || mLEDStr.trim().length() == 0) return;
if(mLEDData != null) return;
Executors.newSingleThreadExecutor().execute(new Runnable() {
@Override
public void run() {
synchronized (LEDView.this){
mLEDData = null;
}
mTextPaint.setColor(mLEDColor);
mTextPaint.setTextSize(kTextSize);
kTextBaseLine = kRawBitmapHight/2 + kTextSize/2 - kTextSize/10;
float textLen = mTextPaint.measureText(mLEDStr);
Bitmap bitmap = Bitmap.createBitmap((int)textLen,kRawBitmapHight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawText(mLEDStr,0,kTextBaseLine,mTextPaint);
Canvas LEDCanvas = mHolder.lockCanvas();
if(LEDCanvas != null){
try {
LEDFrame ledFrame = new LEDFrame(bitmap.getWidth(),bitmap.getHeight());
initLEDFrame(ledFrame,bitmap);
bitmap.recycle();
int scale = mLEDWidth/kRawBitmapHight;
int screenW = mLEDHight/scale;
Log.d("scott"," screen w = " + screenW);
LEDData ledData = new LEDData();
ledData.frame = ledFrame;
ledData.pixelH = kRawBitmapHight;
ledData.pixelW = (int)textLen;
ledData.scale = scale;
ledData.ledScreenH = kRawBitmapHight;
ledData.LedScreenW = screenW;
synchronized (LEDView.this){
mLEDData = ledData;
}
}catch (Exception e){
e.printStackTrace();
}finally {
mHolder.unlockCanvasAndPost(LEDCanvas);
}
}
}
});
}
private void initLEDFrame(LEDFrame ledFrame,Bitmap bitmap){
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Log.d("scott","bitmap w : " + w + " bitmap h = " + h);
for(int x = 0;x<w;x++){
for(int y = 0;y<h;y++){
ledFrame.fillData(y,x,bitmap.getPixel(x,y));
}
}
}
@Override
public void run() {
mT1 = System.currentTimeMillis();
if(mIsDestory) return;
if(mHolder == null) return;
Canvas LEDCanvas = mHolder.lockCanvas();
if(LEDCanvas != null){
try {
if(mLEDData != null){
LEDCanvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR);
int fixH = mLEDData.getFixLEDHeight();
int fixW = mLEDData.getFixLEDWidth();
for(int i = 0;i<fixH;i+=2){
for(int j = 0;j<fixW;j+=2){
int pX = j*mLEDData.scale;
int pY = i*mLEDData.scale;
if(mLEDData.getPixelColor(i,j) != 0){
mTextPaint.setColor(mLEDData.getPixelColor(i,j));
LEDCanvas.drawCircle(pX,pY,mLEDData.scale/2,mTextPaint);
}
}
}
mLEDData.nextFrame();
}
}catch (Exception e){
e.printStackTrace();
}finally {
mHolder.unlockCanvasAndPost(LEDCanvas);
}
}
mT2 = System.currentTimeMillis();
mTD = mT2 - mT1;
if(mTD < kFPS){
mHandler.postDelayed(this,kFPS-mTD);
}else {
mHandler.post(this);
}
}
private class LEDFrame{
int[][] frameData;
LEDFrame(int w,int h){
frameData = new int[h][w];
}
void fillData(int r,int c,int value){
frameData[r][c] = value;
}
void dump(){
StringBuilder stringBuilder = new StringBuilder();
for(int i = 0;i<frameData.length;i++){
for(int j = 0;j<frameData[i].length;j++){
stringBuilder.append(frameData[i][j] + " ");
}
stringBuilder.append("\n");
}
Log.d("scott",stringBuilder.toString());
}
int[][] getData(){
return frameData;
}
}
private class LEDData{
LEDFrame frame;
int scale;
int pixelW;
int pixelH;
int ledScreenH;
int LedScreenW;
int delta = 0;
void nextFrame(){
if(LedScreenW >= pixelW) return;
delta ++ ;
}
int getFixLEDWidth(){
return pixelW<=LedScreenW?pixelW:LedScreenW;
}
int getFixLEDHeight(){
return pixelH;
}
int getPixelColor(int i,int j){
if(j+delta< pixelW){
return frame.frameData[i][j + delta];
}else {
return frame.frameData[i][(j + delta)%pixelW];
}
}
}
}
