Skip to content

fix(pdf): apply color filters when exporting to PDF on android #718

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
farfromrefug merged 1 commit into from
Sep 10, 2026
Merged

fix(pdf): apply color filters when exporting to PDF on android #718

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 5 additions & 2 deletions plugin-nativeprocessor/platforms/android/java/com/akylas/documentscanner/utils/PDFUtils.kt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -256,14 +256,17 @@ class PDFUtils {
)
}
finalBitmapOptions.inMutable = colorMatrix != null
val bmp = BitmapFactory.decodeFile(src, finalBitmapOptions) ?: return null
var bmp = BitmapFactory.decodeFile(src, finalBitmapOptions) ?: return null
if (hasColorMatrix) {
val jsonArray = JSONArray(colorMatrix)
val floatArray = Array(jsonArray.length()) { jsonArray.getDouble(it).toFloat() }
val canvas = android.graphics.Canvas(bmp)
val filteredBmp = Bitmap.createBitmap(bmp.width, bmp.height, bmp.config ?: Bitmap.Config.ARGB_8888)
val canvas = android.graphics.Canvas(filteredBmp)
val paint = Paint()
paint.colorFilter = ColorMatrixColorFilter(floatArray.toFloatArray())
canvas.drawBitmap(bmp, 0F, 0F, paint)
bmp.recycle()
bmp = filteredBmp
}

val imgBytes = ByteArrayOutputStream()
Expand Down
Loading