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package com.google.snappy;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
/**
* Created by andyhuibers on 9/18/14.
*/
public class PreviewOverlay extends View {
private static final String TAG = "SNAPPY_FACE";
private boolean mShow3AInfo;
private boolean mShowGyroGrid;
private int mColor;
private int mColor2;
private Paint mPaint;
private Paint mPaint2;
// Rendered data:
private NormalizedFace[] mFaces;
private float mExposure;
private float mLens;
private int mAfState;
private float mFovLargeDegrees;
private float mFovSmallDegrees;
float[] mAngles = new float[2];
public PreviewOverlay(Context context, AttributeSet attrs) {
super(context, attrs);
Resources res = getResources();
mColor = res.getColor(R.color.face_color);
mPaint = new Paint();
mPaint.setColor(mColor);
mPaint.setAntiAlias(true);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeWidth(res.getDimension(R.dimen.face_circle_stroke));
mColor2 = res.getColor(R.color.hud_color);
mPaint2 = new Paint();
mPaint2.setAntiAlias(true);
mPaint2.setStyle(Paint.Style.STROKE);
mPaint2.setStrokeWidth(res.getDimension(R.dimen.hud_stroke));
}
public void setFrameData(NormalizedFace[] faces, float normExposure, float normLens, int afState) {
mFaces = faces;
mExposure = normExposure;
mLens = normLens;
mAfState = afState;
this.setVisibility(VISIBLE);
invalidate();
}
public void show3AInfo(boolean show) {
mShow3AInfo = show;
this.setVisibility(VISIBLE);
invalidate();
}
public void setGyroAngles(float[] angles) {
mAngles = angles;
}
public void setFieldOfView(float fovLargeDegrees, float fovSmallDegrees) {
mFovLargeDegrees = fovLargeDegrees;
mFovSmallDegrees = fovSmallDegrees;
}
public void showGyroGrid(boolean show) {
mShowGyroGrid = show;
this.setVisibility(VISIBLE);
invalidate();
}
private static double SHORT_LOG_EXPOSURE = Math.log10(1000000000 / 10000); // 1/10000 second
private static double LONG_LOG_EXPOSURE = Math.log10(1000000000 / 10); // 1/10 second
float[] yGridValues = new float[] {
(float) ((Math.log10(1000000000 / 30) - SHORT_LOG_EXPOSURE) / (LONG_LOG_EXPOSURE - SHORT_LOG_EXPOSURE)),
(float) ((Math.log10(1000000000 / 100) - SHORT_LOG_EXPOSURE) / (LONG_LOG_EXPOSURE - SHORT_LOG_EXPOSURE)),
(float) ((Math.log10(1000000000 / 1000) - SHORT_LOG_EXPOSURE) / (LONG_LOG_EXPOSURE - SHORT_LOG_EXPOSURE))};
/** Focus states
CONTROL_AF_STATE_INACTIVE 0
CONTROL_AF_STATE_PASSIVE_SCAN 1
CONTROL_AF_STATE_PASSIVE_FOCUSED 2
CONTROL_AF_STATE_ACTIVE_SCAN 3
CONTROL_AF_STATE_FOCUSED_LOCKED 4
CONTROL_AF_STATE_NOT_FOCUSED_LOCKED 5
CONTROL_AF_STATE_PASSIVE_UNFOCUSED 6
*/
@Override
protected void onDraw(Canvas canvas) {
if (mFaces == null) {
return;
}
float previewW = this.getWidth();
float previewH = this.getHeight();
// 3A visualizatoins
if (mShow3AInfo) {
// Draw 3A ball on a rail
if (false) {
mPaint2.setStyle(Paint.Style.FILL_AND_STROKE);
mPaint2.setColor(0x33FFFFFF);
canvas.drawRect(0.04f * previewW, 0.03f * previewH, 0.96f * previewW, 0.05f * previewH, mPaint2);
mPaint2.setStyle(Paint.Style.FILL_AND_STROKE);
float x1 = (0.92f * mLens + 0.04f) * previewW;
float y1 = (0.04f) * previewH;
mPaint2.setColor(0xFF000000);
canvas.drawCircle(x1, y1, 20, mPaint2);
mPaint2.setColor(0xFFDDDDDD);
canvas.drawCircle(x1, y1, 18, mPaint2);
}
// Draw AF center thing
mPaint2.setStyle(Paint.Style.FILL_AND_STROKE);
float x2 = 0.5f * previewW;
float y2 = 0.5f * previewH;
mPaint2.setColor(0x990000FF);
String text = "NOT IN CAF";
if (mAfState == 1) { // passive scan RED
mPaint2.setColor(0x99FF0000);
text = "CAF SCAN";
}
if (mAfState == 2) { // passive good
mPaint2.setColor(0x9999FF99);
text = "CAF FOCUSED";
}
if (mAfState == 6) { // passive bad
mPaint2.setColor(0x99FFFFFF);
text = "CAF UNFOCUSED";
}
canvas.drawCircle(x2, y2, mLens * 0.25f * previewW, mPaint2);
mPaint.setColor(0xFFFFFFFF);
mPaint.setTextSize(36f);
canvas.drawText(text, x2, y2 - mLens * 0.25f * previewW - 7f, mPaint);
}
// Draw Faces
for (NormalizedFace face : mFaces) {
RectF r1 = face.bounds;
float newY = r1.centerX() * previewH;
float newX = (1 - r1.centerY()) * previewW;
float dY = r1.width() * previewH;
float dX = r1.height() * previewW;
float dP = (dX + dY) * 0.045f;
RectF newR1 = new RectF(newX - dX * 0.5f, newY - dY * 0.5f, newX + dX * 0.5f, newY + dY * 0.5f);
canvas.drawRoundRect(newR1, dP, dP, mPaint);
PointF[] p = new PointF[3];
p[0] = face.leftEye;
p[1] = face.rightEye;
p[2] = face.mouth;
for (int j = 0; j < 3; j++) {
if (p[j] == null) {
continue;
}
newY = p[j].x * previewH;
newX = (1 - p[j].y) * previewW;
canvas.drawCircle(newX, newY, dP, mPaint);
}
}
// Draw Gyro grid.
if (mShowGyroGrid) {
float x1, x2, y1, y2;
//
// screen/sensor
// |
// screen/2 = FL tan(FOV/2) |
// | lens
// |<––––––––––––– FL –––––––––––>()–––––––––> scene @ infinity
// |
// |
// |
//
float focalLengthH = 0.5f * previewH / (float) Math.tan(Math.toRadians(mFovLargeDegrees) * 0.5);
float focalLengthW = 0.5f * previewW / (float) Math.tan(Math.toRadians(mFovSmallDegrees) * 0.5);
final double ANGLE_STEP = (float) Math.toRadians(10f);
// Draw horizontal lines, with 10 degree spacing.
double phase1 = mAngles[0] % ANGLE_STEP;
for (double i = -5 * ANGLE_STEP + phase1; i < 5 * ANGLE_STEP; i += ANGLE_STEP) {
x1 = 0;
x2 = previewW;
y1 = y2 = previewH / 2 + focalLengthH * (float) Math.tan(i);
canvas.drawLine(x1, y1, x2, y2, mPaint);
}
// Draw vertical lines, with 10 degree spacing.
double phase2 = mAngles[1] % ANGLE_STEP;
for (double i = -5 * ANGLE_STEP + phase2; i < 5 * ANGLE_STEP; i += ANGLE_STEP) {
x1 = x2 = previewW / 2 + focalLengthW * (float) Math.tan(i);
y1 = 0;
y2 = previewH;
canvas.drawLine(x1, y1, x2, y2, mPaint);
}
}
super.onDraw(canvas);
}
}
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