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CropScreen: remove stripes in loupe

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This commit is contained in:
Pierre-Yves Nicolas
2026-05-07 17:42:01 +02:00
parent b089baec97
commit baa8318de6
1 changed files with 0 additions and 42 deletions
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42
app/src/main/java/org/fairscan/app/ui/screens/crop/MagnifyingGlass.kt
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@@ -207,48 +207,6 @@ fun MagnifyingGlass(
normalizedToLoupe(quad.bottomLeft.x, quad.bottomLeft.y),
)
// Striped overlay outside the quad to distinguish document from background
val quadPath = Path().apply {
moveTo(loupeCorners[0].x, loupeCorners[0].y)
for (corner in loupeCorners.drop(1)) {
lineTo(corner.x, corner.y)
}
close()
}
clipPath(quadPath, clipOp = ClipOp.Difference) {
// Clip to actual image bounds so stripes only appear over
// image content, not in the background area near edges.
val imgLeft = -bitmapOriginX * scale
val imgTop = -bitmapOriginY * scale
val imgRight = (bitmap.width - bitmapOriginX) * scale
val imgBottom = (bitmap.height - bitmapOriginY) * scale
clipRect(
left = imgLeft, top = imgTop,
right = imgRight, bottom = imgBottom
) {
val stripeSpacing = 50f
val stripeWidth = 10f
val stripeColor = Color.Gray.copy(alpha = 0.35f)
// Stripes are placed at fixed positions in bitmap coordinate
// space so they scroll with the image as the loupe pans.
val originShift = (bitmapOriginX + bitmapOriginY) * scale
val kMin = floor(originShift / stripeSpacing).toInt() - 1
val kMax = ceil((originShift + 2f * loupeDiameter) / stripeSpacing).toInt() + 1
for (k in kMin..kMax) {
val loupeSum = k * stripeSpacing - originShift
drawLine(
color = stripeColor,
start = Offset(loupeSum, 0f),
end = Offset(0f, loupeSum),
strokeWidth = stripeWidth,
)
}
}
}
// Draw quad edge lines on top
for (i in 0 until 4) {
drawLine(