// L2 distance
private static int distance(ResultPoint a, ResultPoint b) {
return round(
(float)
Math.sqrt(
(a.getX() - b.getX()) * (a.getX() - b.getX())
+ (a.getY() - b.getY()) * (a.getY() - b.getY())));
}
private static BitMatrix sampleGrid(
BitMatrix image,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint bottomRight,
ResultPoint topRight,
int dimension)
throws NotFoundException {
GridSampler sampler = GridSampler.getInstance();
return sampler.sampleGrid(
image,
dimension,
0.5f,
0.5f,
dimension - 0.5f,
0.5f,
dimension - 0.5f,
dimension - 0.5f,
0.5f,
dimension - 0.5f,
topLeft.getX(),
topLeft.getY(),
topRight.getX(),
topRight.getY(),
bottomRight.getX(),
bottomRight.getY(),
bottomLeft.getX(),
bottomLeft.getY());
}
private static BitMatrix sampleGrid(
BitMatrix matrix,
ResultPoint topLeft,
ResultPoint bottomLeft,
ResultPoint topRight,
ResultPoint bottomRight,
int dimension)
throws NotFoundException {
// Note that unlike the QR Code sampler, we didn't find the center of
// modules, but the
// very corners. So there is no 0.5f here; 0.0f is right.
GridSampler sampler = GridSampler.getInstance();
return sampler.sampleGrid(
matrix,
dimension,
dimension,
0.0f, // p1ToX
0.0f, // p1ToY
dimension, // p2ToX
0.0f, // p2ToY
dimension, // p3ToX
dimension, // p3ToY
0.0f, // p4ToX
dimension, // p4ToY
topLeft.getX(), // p1FromX
topLeft.getY(), // p1FromY
topRight.getX(), // p2FromX
topRight.getY(), // p2FromY
bottomRight.getX(), // p3FromX
bottomRight.getY(), // p3FromY
bottomLeft.getX(), // p4FromX
bottomLeft.getY()); // p4FromY
}
@Override
public void onDraw(Canvas canvas) {
// 中间的扫描框，你要修改扫描框的大小，去CameraManager里面修改
frame = CameraManager.get().getFramingRect();
if (frame == null) {
return;
}
if (!isFirst) {
isFirst = true;
slideBottom = START_SCAN_Y + frame.width();
}
paint.setColor(resultBitmap != null ? resultColor : maskColor);
// 绘制扫描区域外的阴影
drawScanArea(canvas);
if (resultBitmap != null) {
// Draw the opaque result bitmap over the scanning rectangle
paint.setAlpha(OPAQUE);
canvas.drawBitmap(resultBitmap, frame.left, frame.top, paint);
} else {
// 绘制扫描区域的四角
drawArc(canvas);
// 绘制中间的线,每次刷新界面，中间的线往下移动SPEEN_DISTANCE
slideTop += SPEEN_DISTANCE;
if (slideTop >= slideBottom) {
slideTop = START_SCAN_Y;
}
canvas.drawRect(
frame.left + MIDDLE_LINE_PADDING,
slideTop - MIDDLE_LINE_WIDTH / 2,
frame.right - MIDDLE_LINE_PADDING,
slideTop + MIDDLE_LINE_WIDTH / 2,
paint);
// 画扫描框下面的字
drawText(canvas);
Collection<ResultPoint> currentPossible = possibleResultPoints;
Collection<ResultPoint> currentLast = lastPossibleResultPoints;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new HashSet<ResultPoint>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(OPAQUE);
paint.setColor(resultPointColor);
for (ResultPoint point : currentPossible) {
canvas.drawCircle(frame.left + point.getX(), START_SCAN_Y + point.getY(), 6.0f, paint);
}
}
if (currentLast != null) {
paint.setAlpha(OPAQUE / 2);
paint.setColor(resultPointColor);
for (ResultPoint point : currentLast) {
canvas.drawCircle(frame.left + point.getX(), START_SCAN_Y + point.getY(), 3.0f, paint);
}
}
// 只刷新扫描框的内容，其他地方不刷新
postInvalidateDelayed(ANIMATION_DELAY, frame.left, START_SCAN_Y, frame.right, slideBottom);
}
}
private static void drawLine(
Canvas canvas, Paint paint, ResultPoint a, ResultPoint b, int scaleFactor) {
if (a != null && b != null) {
canvas.drawLine(
a.getX() / scaleFactor,
a.getY() / scaleFactor,
b.getX() / scaleFactor,
b.getY() / scaleFactor,
paint);
}
}
private static void drawLine(
Canvas canvas, Paint paint, ResultPoint a, ResultPoint b, float scaleFactor) {
if (a != null && b != null) {
canvas.drawLine(
scaleFactor * a.getX(),
scaleFactor * a.getY(),
scaleFactor * b.getX(),
scaleFactor * b.getY(),
paint);
}
}
protected void drawResultPoints(Bitmap barcode, Result rawResult) {
ResultPoint[] points = rawResult.getResultPoints();
if (points != null && points.length > 0) {
Canvas canvas = new Canvas(barcode);
Paint paint = new Paint();
paint.setColor(getResources().getColor(R.color.result_image_border));
paint.setStrokeWidth(3.0f);
paint.setStyle(Paint.Style.STROKE);
Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
canvas.drawRect(border, paint);
paint.setColor(getResources().getColor(R.color.result_points));
if (points.length == 2) {
paint.setStrokeWidth(4.0f);
drawLine(canvas, paint, points[0], points[1]);
} else if (points.length == 4
&& (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
|| rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
// Hacky special case -- draw two lines, for the barcode and
// metadata
drawLine(canvas, paint, points[0], points[1]);
drawLine(canvas, paint, points[2], points[3]);
} else {
paint.setStrokeWidth(10.0f);
for (ResultPoint point : points) {
canvas.drawPoint(point.getX(), point.getY(), paint);
}
}
}
}
/**
* @param color Color of result points
* @return {@link Bitmap} with result points on it, or plain bitmap, if no result points
*/
public Bitmap getBitmapWithResultPoints(int color) {
Bitmap bitmap = getBitmap();
Bitmap barcode = bitmap;
ResultPoint[] points = mResult.getResultPoints();
if (points != null && points.length > 0 && bitmap != null) {
barcode = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(barcode);
canvas.drawBitmap(bitmap, 0, 0, null);
Paint paint = new Paint();
paint.setColor(color);
if (points.length == 2) {
paint.setStrokeWidth(PREVIEW_LINE_WIDTH);
drawLine(canvas, paint, points[0], points[1], mScaleFactor);
} else if (points.length == 4
&& (mResult.getBarcodeFormat() == BarcodeFormat.UPC_A
|| mResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
// Hacky special case -- draw two lines, for the barcode and metadata
drawLine(canvas, paint, points[0], points[1], mScaleFactor);
drawLine(canvas, paint, points[2], points[3], mScaleFactor);
} else {
paint.setStrokeWidth(PREVIEW_DOT_WIDTH);
for (ResultPoint point : points) {
if (point != null) {
canvas.drawPoint(point.getX() / mScaleFactor, point.getY() / mScaleFactor, paint);
}
}
}
}
return barcode;
}
/**
* Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
*
* @param barcode A bitmap of the captured image.
* @param scaleFactor amount by which thumbnail was scaled
* @param rawResult The decoded results which contains the points to draw.
*/
private void drawResultPoints(Bitmap barcode, float scaleFactor, Result rawResult) {
ResultPoint[] points = rawResult.getResultPoints();
if (points != null && points.length > 0) {
Canvas canvas = new Canvas(barcode);
Paint paint = new Paint();
paint.setColor(getResources().getColor(R.color.result_points));
if (points.length == 2) {
paint.setStrokeWidth(4.0f);
drawLine(canvas, paint, points[0], points[1], scaleFactor);
} else if (points.length == 4
&& (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
|| rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
// Hacky special case -- draw two lines, for the barcode and metadata
drawLine(canvas, paint, points[0], points[1], scaleFactor);
drawLine(canvas, paint, points[2], points[3], scaleFactor);
} else {
paint.setStrokeWidth(10.0f);
for (ResultPoint point : points) {
if (point != null) {
canvas.drawPoint(scaleFactor * point.getX(), scaleFactor * point.getY(), paint);
}
}
}
}
}
public void handleResult(
final Result scanResult, final Bitmap thumbnailImage, final float thumbnailScaleFactor) {
vibrator.vibrate(VIBRATE_DURATION);
// superimpose dots to highlight the key features of the qr code
final ResultPoint[] points = scanResult.getResultPoints();
if (points != null && points.length > 0) {
final Paint paint = new Paint();
paint.setColor(getResources().getColor(R.color.scan_result_dots));
paint.setStrokeWidth(10.0f);
final Canvas canvas = new Canvas(thumbnailImage);
canvas.scale(thumbnailScaleFactor, thumbnailScaleFactor);
for (final ResultPoint point : points) canvas.drawPoint(point.getX(), point.getY(), paint);
}
scannerView.drawResultBitmap(thumbnailImage);
final Intent result = new Intent();
result.putExtra(INTENT_EXTRA_RESULT, scanResult.getText());
setResult(RESULT_OK, result);
// delayed finish
new Handler()
.post(
new Runnable() {
@Override
public void run() {
finish();
}
});
}
private static Result translateResultPoints(Result result, int xOffset, int yOffset) {
ResultPoint[] oldResultPoints = result.getResultPoints();
ResultPoint[] newResultPoints = new ResultPoint[oldResultPoints.length];
for (int i = 0; i < oldResultPoints.length; i++) {
ResultPoint oldPoint = oldResultPoints[i];
newResultPoints[i] = new ResultPoint(oldPoint.getX() + xOffset, oldPoint.getY() + yOffset);
}
return new Result(
result.getText(), result.getRawBytes(), newResultPoints, result.getBarcodeFormat());
}
/**
* Counts the number of black/white transitions between two points, using something like
* Bresenham's algorithm.
*/
private ResultPointsAndTransitions transitionsBetween(ResultPoint from, ResultPoint to) {
// See QR Code Detector, sizeOfBlackWhiteBlackRun()
int fromX = (int) from.getX();
int fromY = (int) from.getY();
int toX = (int) to.getX();
int toY = (int) to.getY();
boolean steep = Math.abs(toY - fromY) > Math.abs(toX - fromX);
if (steep) {
int temp = fromX;
fromX = fromY;
fromY = temp;
temp = toX;
toX = toY;
toY = temp;
}
int dx = Math.abs(toX - fromX);
int dy = Math.abs(toY - fromY);
int error = -dx >> 1;
int ystep = fromY < toY ? 1 : -1;
int xstep = fromX < toX ? 1 : -1;
int transitions = 0;
boolean inBlack = image.get(steep ? fromY : fromX, steep ? fromX : fromY);
for (int x = fromX, y = fromY; x != toX; x += xstep) {
boolean isBlack = image.get(steep ? y : x, steep ? x : y);
if (isBlack != inBlack) {
transitions++;
inBlack = isBlack;
}
error += dy;
if (error > 0) {
if (y == toY) {
break;
}
y += ystep;
error -= dx;
}
}
return new ResultPointsAndTransitions(from, to, transitions);
}
/**
* 绘制可疑点
*
* @param canvas
*/
private void drawPossibleResult(Canvas canvas) {
Collection<ResultPoint> currentPossible = possibleResultPoints;
Collection<ResultPoint> currentLast = lastPossibleResultPoints;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new HashSet<ResultPoint>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(OPAQUE);
paint.setColor(getResultPointColor());
for (ResultPoint point : currentPossible) {
canvas.drawCircle(point.getX(), point.getY(), getNewResultPointRadius(), paint);
}
}
if (currentLast != null) {
paint.setAlpha(OPAQUE / 2);
paint.setColor(resultPointColor);
for (ResultPoint point : currentLast) {
canvas.drawCircle(point.getX(), point.getY(), getLastResultPointRadius(), paint);
}
}
}
private ResultPoint[] centerEdges(ResultPoint resultpoint, ResultPoint resultpoint1, ResultPoint resultpoint2, ResultPoint resultpoint3)
{
float f = resultpoint.getX();
float f1 = resultpoint.getY();
float f2 = resultpoint1.getX();
float f3 = resultpoint1.getY();
float f4 = resultpoint2.getX();
float f5 = resultpoint2.getY();
float f6 = resultpoint3.getX();
float f7 = resultpoint3.getY();
if (f < (float)width / 2.0F)
{
return (new ResultPoint[] {
new ResultPoint(f6 - 1.0F, 1.0F + f7), new ResultPoint(1.0F + f2, 1.0F + f3), new ResultPoint(f4 - 1.0F, f5 - 1.0F), new ResultPoint(1.0F + f, f1 - 1.0F)
});
} else
{
return (new ResultPoint[] {
new ResultPoint(1.0F + f6, 1.0F + f7), new ResultPoint(1.0F + f2, f3 - 1.0F), new ResultPoint(f4 - 1.0F, 1.0F + f5), new ResultPoint(f - 1.0F, f1 - 1.0F)
});
}
}
// TODO maybe we should add missing codewords to store the correct row number to make
// finding row numbers for other columns easier
// use row height count to make detection of invalid row numbers more reliable
int adjustIncompleteIndicatorColumnRowNumbers(BarcodeMetadata barcodeMetadata) {
BoundingBox boundingBox = getBoundingBox();
ResultPoint top = isLeft ? boundingBox.getTopLeft() : boundingBox.getTopRight();
ResultPoint bottom = isLeft ? boundingBox.getBottomLeft() : boundingBox.getBottomRight();
int firstRow = imageRowToCodewordIndex((int) top.getY());
int lastRow = imageRowToCodewordIndex((int) bottom.getY());
float averageRowHeight = (lastRow - firstRow) / (float) barcodeMetadata.getRowCount();
Codeword[] codewords = getCodewords();
int barcodeRow = -1;
int maxRowHeight = 1;
int currentRowHeight = 0;
for (int codewordsRow = firstRow; codewordsRow < lastRow; codewordsRow++) {
if (codewords[codewordsRow] == null) {
continue;
}
Codeword codeword = codewords[codewordsRow];
codeword.setRowNumberAsRowIndicatorColumn();
int rowDifference = codeword.getRowNumber() - barcodeRow;
// TODO improve handling with case where first row indicator doesn't start with 0
if (rowDifference == 0) {
currentRowHeight++;
} else if (rowDifference == 1) {
maxRowHeight = Math.max(maxRowHeight, currentRowHeight);
currentRowHeight = 1;
barcodeRow = codeword.getRowNumber();
} else if (codeword.getRowNumber() >= barcodeMetadata.getRowCount()) {
codewords[codewordsRow] = null;
} else {
barcodeRow = codeword.getRowNumber();
currentRowHeight = 1;
}
}
return (int) (averageRowHeight + 0.5);
}
/**
* Transform result to surfaceView coordinates
*
* <p>This method is needed because coordinates are given in landscape camera coordinates. Now is
* working but transform operations aren't very explained
*
* <p>TODO re-write this method explaining each single value
*
* @return a new PointF array with transformed points
*/
private PointF[] transformToViewCoordinates(ResultPoint[] resultPoints) {
PointF[] transformedPoints = new PointF[resultPoints.length];
int index = 0;
if (resultPoints != null) {
float previewX = mCameraManager.getPreviewSize().x;
float previewY = mCameraManager.getPreviewSize().y;
float scaleX = this.getWidth() / previewY;
float scaleY = this.getHeight() / previewX;
for (ResultPoint point : resultPoints) {
PointF tmppoint = new PointF((previewY - point.getY()) * scaleX, point.getX() * scaleY);
transformedPoints[index] = tmppoint;
index++;
}
}
return transformedPoints;
}
private ResultPoint correctTopRight(ResultPoint resultpoint, ResultPoint resultpoint1, ResultPoint resultpoint2, ResultPoint resultpoint3, int i)
{
ResultPoint resultpoint4;
float f = (float)distance(resultpoint, resultpoint1) / (float)i;
int j = distance(resultpoint2, resultpoint3);
float f1 = (resultpoint3.getX() - resultpoint2.getX()) / (float)j;
float f2 = (resultpoint3.getY() - resultpoint2.getY()) / (float)j;
resultpoint4 = new ResultPoint(resultpoint3.getX() + f * f1, resultpoint3.getY() + f * f2);
f = (float)distance(resultpoint, resultpoint2) / (float)i;
i = distance(resultpoint1, resultpoint3);
f1 = (resultpoint3.getX() - resultpoint1.getX()) / (float)i;
f2 = (resultpoint3.getY() - resultpoint1.getY()) / (float)i;
resultpoint3 = new ResultPoint(resultpoint3.getX() + f * f1, resultpoint3.getY() + f * f2);
if (isValid(resultpoint4)) goto _L2; else goto _L1
/**
* Calculates the position of the white top right module using the output of the rectangle
* detector
*/
private ResultPoint correctTopRight(
ResultPoint bottomLeft,
ResultPoint bottomRight,
ResultPoint topLeft,
ResultPoint topRight,
int dimension) {
float corr = distance(bottomLeft, bottomRight) / (float) dimension;
int norm = distance(topLeft, topRight);
float cos = (topRight.getX() - topLeft.getX()) / norm;
float sin = (topRight.getY() - topLeft.getY()) / norm;
ResultPoint c1 = new ResultPoint(topRight.getX() + corr * cos, topRight.getY() + corr * sin);
corr = distance(bottomLeft, bottomRight) / (float) dimension;
norm = distance(bottomRight, topRight);
cos = (topRight.getX() - bottomRight.getX()) / norm;
sin = (topRight.getY() - bottomRight.getY()) / norm;
ResultPoint c2 = new ResultPoint(topRight.getX() + corr * cos, topRight.getY() + corr * sin);
if (!isValid(c1)) {
if (isValid(c2)) {
return c2;
}
return null;
} else if (!isValid(c2)) {
return c1;
}
int l1 =
Math.abs(
transitionsBetween(topLeft, c1).getTransitions()
- transitionsBetween(bottomRight, c1).getTransitions());
int l2 =
Math.abs(
transitionsBetween(topLeft, c2).getTransitions()
- transitionsBetween(bottomRight, c2).getTransitions());
if (l1 <= l2) {
return c1;
}
return c2;
}
/**
* Superimpose a line for 1D or dots for 2D to highlight the key features of the barcode.
*
* @param barcode A bitmap of the captured image.
* @param rawResult The decoded results which contains the points to draw.
*/
private void drawResultPoints(Bitmap barcode, Result rawResult) {
ResultPoint[] points = rawResult.getResultPoints();
if (points != null && points.length > 0) {
Canvas canvas = new Canvas(barcode);
Paint paint = new Paint();
paint.setColor(getResources().getColor(R.color.result_image_border));
paint.setStrokeWidth(3.0f);
paint.setStyle(Paint.Style.STROKE);
Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
canvas.drawRect(border, paint);
paint.setColor(getResources().getColor(R.color.result_points));
if (points.length == 2) {
paint.setStrokeWidth(4.0f);
canvas.drawLine(
points[0].getX(), points[0].getY(), points[1].getX(), points[1].getY(), paint);
} else {
paint.setStrokeWidth(10.0f);
for (ResultPoint point : points) {
canvas.drawPoint(point.getX(), point.getY(), paint);
}
}
}
}
@Override
public void onDraw(Canvas canvas) {
if (cameraManager == null) {
return; // not ready yet, early draw before done configuring
}
Rect frame = cameraManager.getFramingRect();
Rect previewFrame = cameraManager.getFramingRectInPreview();
if (frame == null || previewFrame == null) {
return;
}
int width = canvas.getWidth();
int height = canvas.getHeight();
// Draw the exterior (i.e. outside the framing rect) darkened
paint.setColor(resultBitmap != null ? resultColor : maskColor);
canvas.drawRect(0, 0, width, frame.top, paint);
canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);
canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);
canvas.drawRect(0, frame.bottom + 1, width, height, paint);
if (resultBitmap != null) {
// Draw the opaque result bitmap over the scanning rectangle
paint.setAlpha(CURRENT_POINT_OPACITY);
canvas.drawBitmap(resultBitmap, null, frame, paint);
} else {
// Draw a red "laser scanner" line through the middle to show decoding is active
paint.setColor(laserColor);
paint.setAlpha(SCANNER_ALPHA[scannerAlpha]);
scannerAlpha = (scannerAlpha + 1) % SCANNER_ALPHA.length;
int middle = frame.height() / 2 + frame.top;
canvas.drawRect(frame.left + 2, middle - 1, frame.right - 1, middle + 2, paint);
float scaleX = frame.width() / (float) previewFrame.width();
float scaleY = frame.height() / (float) previewFrame.height();
List<ResultPoint> currentPossible = possibleResultPoints;
List<ResultPoint> currentLast = lastPossibleResultPoints;
int frameLeft = frame.left;
int frameTop = frame.top;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new ArrayList<ResultPoint>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(CURRENT_POINT_OPACITY);
paint.setColor(resultPointColor);
synchronized (currentPossible) {
for (ResultPoint point : currentPossible) {
canvas.drawCircle(
frameLeft + (int) (point.getX() * scaleX),
frameTop + (int) (point.getY() * scaleY),
POINT_SIZE,
paint);
}
}
}
if (currentLast != null) {
paint.setAlpha(CURRENT_POINT_OPACITY / 2);
paint.setColor(resultPointColor);
synchronized (currentLast) {
float radius = POINT_SIZE / 2.0f;
for (ResultPoint point : currentLast) {
canvas.drawCircle(
frameLeft + (int) (point.getX() * scaleX),
frameTop + (int) (point.getY() * scaleY),
radius,
paint);
}
}
}
// Request another update at the animation interval, but only repaint the laser line,
// not the entire viewfinder mask.
postInvalidateDelayed(
ANIMATION_DELAY,
frame.left - POINT_SIZE,
frame.top - POINT_SIZE,
frame.right + POINT_SIZE,
frame.bottom + POINT_SIZE);
}
}
@SuppressWarnings("unchecked")
private void doDecodeMultiple(
BinaryBitmap image,
@SuppressWarnings("rawtypes") Hashtable hints,
@SuppressWarnings("rawtypes") Vector results,
int xOffset,
int yOffset) {
Result result;
try {
result = delegate.decode(image, hints);
} catch (ReaderException re) {
return;
}
boolean alreadyFound = false;
for (int i = 0; i < results.size(); i++) {
Result existingResult = (Result) results.elementAt(i);
if (existingResult.getText().equals(result.getText())) {
alreadyFound = true;
break;
}
}
if (alreadyFound) {
return;
}
results.addElement(translateResultPoints(result, xOffset, yOffset));
ResultPoint[] resultPoints = result.getResultPoints();
if (resultPoints == null || resultPoints.length == 0) {
return;
}
int width = image.getWidth();
int height = image.getHeight();
float minX = width;
float minY = height;
float maxX = 0.0f;
float maxY = 0.0f;
for (int i = 0; i < resultPoints.length; i++) {
ResultPoint point = resultPoints[i];
float x = point.getX();
float y = point.getY();
if (x < minX) {
minX = x;
}
if (y < minY) {
minY = y;
}
if (x > maxX) {
maxX = x;
}
if (y > maxY) {
maxY = y;
}
}
// Decode left of barcode
if (minX > MIN_DIMENSION_TO_RECUR) {
doDecodeMultiple(image.crop(0, 0, (int) minX, height), hints, results, xOffset, yOffset);
}
// Decode above barcode
if (minY > MIN_DIMENSION_TO_RECUR) {
doDecodeMultiple(image.crop(0, 0, width, (int) minY), hints, results, xOffset, yOffset);
}
// Decode right of barcode
if (maxX < width - MIN_DIMENSION_TO_RECUR) {
doDecodeMultiple(
image.crop((int) maxX, 0, width - (int) maxX, height),
hints,
results,
xOffset + (int) maxX,
yOffset);
}
// Decode below barcode
if (maxY < height - MIN_DIMENSION_TO_RECUR) {
doDecodeMultiple(
image.crop(0, (int) maxY, width, height - (int) maxY),
hints,
results,
xOffset,
yOffset + (int) maxY);
}
}
@Override
public void onDraw(Canvas canvas) {
Rect frame = CameraManager.get().getFramingRect();
if (frame == null) {
return;
}
int width = canvas.getWidth();
int height = canvas.getHeight();
// Draw the exterior (i.e. outside the framing rect) darkened
paint.setColor(resultBitmap != null ? resultColor : maskColor);
canvas.drawRect(0, 0, width, frame.top, paint);
canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);
canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);
canvas.drawRect(0, frame.bottom + 1, width, height, paint);
if (resultBitmap != null) {
// Draw the opaque result bitmap over the scanning rectangle
paint.setAlpha(OPAQUE);
canvas.drawBitmap(resultBitmap, frame.left, frame.top, paint);
} else {
// Draw a two pixel solid black border inside the framing rect
paint.setColor(frameColor);
canvas.drawRect(frame.left, frame.top, frame.right + 1, frame.top + 2, paint);
canvas.drawRect(frame.left, frame.top + 2, frame.left + 2, frame.bottom - 1, paint);
canvas.drawRect(frame.right - 1, frame.top, frame.right + 1, frame.bottom - 1, paint);
canvas.drawRect(frame.left, frame.bottom - 1, frame.right + 1, frame.bottom + 1, paint);
// Draw a red "laser scanner" line through the middle to show decoding is active
paint.setColor(laserColor);
paint.setAlpha(SCANNER_ALPHA[scannerAlpha]);
scannerAlpha = (scannerAlpha + 1) % SCANNER_ALPHA.length;
int middle = frame.height() / 2 + frame.top;
canvas.drawRect(frame.left + 2, middle - 1, frame.right - 1, middle + 2, paint);
Collection<ResultPoint> currentPossible = possibleResultPoints;
Collection<ResultPoint> currentLast = lastPossibleResultPoints;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new HashSet<ResultPoint>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(OPAQUE);
paint.setColor(resultPointColor);
for (ResultPoint point : currentPossible) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 6.0f, paint);
}
}
if (currentLast != null) {
paint.setAlpha(OPAQUE / 2);
paint.setColor(resultPointColor);
for (ResultPoint point : currentLast) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 3.0f, paint);
}
}
// Request another update at the animation interval, but only repaint the laser line,
// not the entire viewfinder mask.
postInvalidateDelayed(ANIMATION_DELAY, frame.left, frame.top, frame.right, frame.bottom);
}
}
private boolean isValid(ResultPoint p) {
return (p.getX() >= 0 && p.getX() < image.width && p.getY() > 0 && p.getY() < image.height);
}
@Override
public void onDraw(Canvas canvas) {
// 中间的扫描框，你要修改扫描框的大小，去CameraManager里面修改
Rect frame = CameraManager.get().getFramingRect();
if (frame == null) {
return;
}
// 初始化中间线滑动的最上边和最下边
if (!isFirst) {
isFirst = true;
slideTop = frame.top;
slideBottom = frame.bottom;
}
// 获取屏幕的宽和高
int width = canvas.getWidth();
int height = canvas.getHeight();
paint.setColor(resultBitmap != null ? resultColor : maskColor);
// 画出扫描框外面的阴影部分，共四个部分，扫描框的上面到屏幕上面，扫描框的下面到屏幕下面
// 扫描框的左边面到屏幕左边，扫描框的右边到屏幕右边
canvas.drawRect(0, 0, width, frame.top, paint);
canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);
canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);
canvas.drawRect(0, frame.bottom + 1, width, height, paint);
if (resultBitmap != null) {
// Draw the opaque result bitmap over the scanning rectangle
paint.setAlpha(OPAQUE);
canvas.drawBitmap(resultBitmap, frame.left, frame.top, paint);
} else {
// 画扫描框边上的角，总共8个部分
paint.setColor(Color.GREEN);
canvas.drawRect(
frame.left, frame.top, frame.left + ScreenRate, frame.top + CORNER_WIDTH, paint);
canvas.drawRect(
frame.left, frame.top, frame.left + CORNER_WIDTH, frame.top + ScreenRate, paint);
canvas.drawRect(
frame.right - ScreenRate, frame.top, frame.right, frame.top + CORNER_WIDTH, paint);
canvas.drawRect(
frame.right - CORNER_WIDTH, frame.top, frame.right, frame.top + ScreenRate, paint);
canvas.drawRect(
frame.left, frame.bottom - CORNER_WIDTH, frame.left + ScreenRate, frame.bottom, paint);
canvas.drawRect(
frame.left, frame.bottom - ScreenRate, frame.left + CORNER_WIDTH, frame.bottom, paint);
canvas.drawRect(
frame.right - ScreenRate, frame.bottom - CORNER_WIDTH, frame.right, frame.bottom, paint);
canvas.drawRect(
frame.right - CORNER_WIDTH, frame.bottom - ScreenRate, frame.right, frame.bottom, paint);
// 绘制中间的线,每次刷新界面，中间的线往下移动SPEEN_DISTANCE
slideTop += SPEEN_DISTANCE;
if (slideTop >= frame.bottom) {
slideTop = frame.top;
}
Rect lineRect = new Rect();
lineRect.left = frame.left;
lineRect.right = frame.right;
lineRect.top = slideTop;
lineRect.bottom = slideTop + 18;
canvas.drawBitmap(
((BitmapDrawable) (getResources().getDrawable(R.drawable.qrcode_scan_line))).getBitmap(),
null,
lineRect,
paint);
// 画扫描框下面的字
paint.setColor(Color.WHITE);
paint.setTextSize(TEXT_SIZE * density);
paint.setAlpha(0x40);
paint.setTypeface(Typeface.create("System", Typeface.BOLD));
String text = getResources().getString(R.string.scan_text);
float textWidth = paint.measureText(text);
canvas.drawText(
text,
(width - textWidth) / 2,
(float) (frame.bottom + (float) TEXT_PADDING_TOP * density),
paint);
Collection<ResultPoint> currentPossible = possibleResultPoints;
Collection<ResultPoint> currentLast = lastPossibleResultPoints;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new HashSet<ResultPoint>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(OPAQUE);
paint.setColor(resultPointColor);
for (ResultPoint point : currentPossible) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 6.0f, paint);
}
}
if (currentLast != null) {
paint.setAlpha(OPAQUE / 2);
paint.setColor(resultPointColor);
for (ResultPoint point : currentLast) {
canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 3.0f, paint);
}
}
// 只刷新扫描框的内容，其他地方不刷新
postInvalidateDelayed(ANIMATION_DELAY, frame.left, frame.top, frame.right, frame.bottom);
}
}
protected static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b) {
canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint);
}
// TODO implement properly
// TODO maybe we should add missing codewords to store the correct row number to make
// finding row numbers for other columns easier
// use row height count to make detection of invalid row numbers more reliable
int adjustCompleteIndicatorColumnRowNumbers(BarcodeMetadata barcodeMetadata) {
Codeword[] codewords = getCodewords();
setRowNumbers();
removeIncorrectCodewords(codewords, barcodeMetadata);
BoundingBox boundingBox = getBoundingBox();
ResultPoint top = isLeft ? boundingBox.getTopLeft() : boundingBox.getTopRight();
ResultPoint bottom = isLeft ? boundingBox.getBottomLeft() : boundingBox.getBottomRight();
int firstRow = imageRowToCodewordIndex((int) top.getY());
int lastRow = imageRowToCodewordIndex((int) bottom.getY());
// We need to be careful using the average row height. Barcode could be skewed so that we have
// smaller and
// taller rows
float averageRowHeight = (lastRow - firstRow) / (float) barcodeMetadata.getRowCount();
int barcodeRow = -1;
int maxRowHeight = 1;
int currentRowHeight = 0;
for (int codewordsRow = firstRow; codewordsRow < lastRow; codewordsRow++) {
if (codewords[codewordsRow] == null) {
continue;
}
Codeword codeword = codewords[codewordsRow];
// float expectedRowNumber = (codewordsRow - firstRow) / averageRowHeight;
// if (Math.abs(codeword.getRowNumber() - expectedRowNumber) > 2) {
// SimpleLog.log(LEVEL.WARNING,
// "Removing codeword, rowNumberSkew too high, codeword[" + codewordsRow + "]:
// Expected Row: " +
// expectedRowNumber + ", RealRow: " + codeword.getRowNumber() + ", value: " +
// codeword.getValue());
// codewords[codewordsRow] = null;
// }
int rowDifference = codeword.getRowNumber() - barcodeRow;
// TODO improve handling with case where first row indicator doesn't start with 0
if (rowDifference == 0) {
currentRowHeight++;
} else if (rowDifference == 1) {
maxRowHeight = Math.max(maxRowHeight, currentRowHeight);
currentRowHeight = 1;
barcodeRow = codeword.getRowNumber();
} else if (rowDifference < 0
|| codeword.getRowNumber() >= barcodeMetadata.getRowCount()
|| rowDifference > codewordsRow) {
codewords[codewordsRow] = null;
} else {
int checkedRows;
if (maxRowHeight > 2) {
checkedRows = (maxRowHeight - 2) * rowDifference;
} else {
checkedRows = rowDifference;
}
boolean closePreviousCodewordFound = checkedRows >= codewordsRow;
for (int i = 1; i <= checkedRows && !closePreviousCodewordFound; i++) {
// there must be (height * rowDifference) number of codewords missing. For now we assume
// height = 1.
// This should hopefully get rid of most problems already.
closePreviousCodewordFound = codewords[codewordsRow - i] != null;
}
if (closePreviousCodewordFound) {
codewords[codewordsRow] = null;
} else {
barcodeRow = codeword.getRowNumber();
currentRowHeight = 1;
}
}
}
return (int) (averageRowHeight + 0.5);
}