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Don't draw more than the actual barcode

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This commit is contained in:
Sylvia van Os
2019-12-04 13:04:42 +01:00
parent 8673405a50
commit 5774064da7
1 changed files with 15 additions and 0 deletions
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15
app/src/main/java/protect/card_locker/BarcodeImageWriterTask.java
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@@ -112,13 +112,28 @@ class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
int bitMatrixWidth = bitMatrix.getWidth();
int bitMatrixHeight = bitMatrix.getHeight();
// Returns: left,top,width,height enclosing rectangle of all 1 bits, or null if it is all white
int[] enclosingRectangle = bitMatrix.getEnclosingRectangle();
int left = enclosingRectangle != null ? enclosingRectangle[0] : 0;
int top = enclosingRectangle != null ? enclosingRectangle[1] : 0;
int right = enclosingRectangle != null ? (enclosingRectangle[0] + enclosingRectangle[2]) : bitMatrixWidth;
int bottom = enclosingRectangle != null ? (enclosingRectangle[1] + enclosingRectangle[3]) : bitMatrixHeight;
int[] pixels = new int[bitMatrixWidth * bitMatrixHeight];
for (int y = 0; y < bitMatrixHeight; y++)
{
if(enclosingRectangle != null && (y < top || y > bottom))
{
continue;
}
int offset = y * bitMatrixWidth;
for (int x = 0; x < bitMatrixWidth; x++)
{
if(enclosingRectangle != null && (x < left || x > right))
{
continue;
}
int color = bitMatrix.get(x, y) ? BLACK : WHITE;
pixels[offset + x] = color;
}