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Code Issues Packages Projects Releases Wiki Activity

android, desktop: constrain image sizes for previews (#6726)

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* android, desktop: constrain image sizes for previews

* use correct JSON parser

* more JSON fixes

* constrain ratio in image decoder

* constrain max height in layout

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Co-authored-by: Evgeny @ SimpleX Chat <259188159+evgeny-simplex@users.noreply.github.com>
This commit is contained in:
Evgeny
2026-03-30 12:24:16 +01:00
committed by GitHub
parent 47f82c10da
commit c3663ae285
4 changed files with 30 additions and 6 deletions
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apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Images.desktop.kt
+15 -1
View File
@@ -21,12 +21,26 @@ import kotlin.math.sqrt
private fun errorBitmap(): ImageBitmap =
ImageIO.read(ByteArrayInputStream(Base64.getMimeDecoder().decode("iVBORw0KGgoAAAANSUhEUgAAAEAAAABACAYAAACqaXHeAAAAAXNSR0IArs4c6QAAAKVJREFUeF7t1kENACEUQ0FQhnVQ9lfGO+xggITQdvbMzArPey+8fa3tAfwAEdABZQspQStgBssEcgAIkSAJkiAJljtEgiRIgmUCSZAESZAESZAEyx0iQRIkwTKBJEiCv5fgvTd1wDmn7QAP4AeIgA4oW0gJWgEzWCZwbQ7gAA7ggLKFOIADOKBMIAeAEAmSIAmSYLlDJEiCJFgmkARJkARJ8N8S/ADTZUewBvnTOQAAAABJRU5ErkJggg=="))).toComposeImageBitmap()
private const val MAX_IMAGE_DIMENSION = 4320
actual fun base64ToBitmap(base64ImageString: String): ImageBitmap {
val imageString = base64ImageString
.removePrefix("data:image/png;base64,")
.removePrefix("data:image/jpg;base64,")
return try {
ImageIO.read(ByteArrayInputStream(Base64.getMimeDecoder().decode(imageString))).toComposeImageBitmap()
val bytes = Base64.getMimeDecoder().decode(imageString)
val stream = ImageIO.createImageInputStream(ByteArrayInputStream(bytes))
val reader = ImageIO.getImageReaders(stream).next()
reader.setInput(stream)
val width = reader.getWidth(0)
val height = reader.getHeight(0)
if (width <= 0 || height <= 0 || width > MAX_IMAGE_DIMENSION || height > MAX_IMAGE_DIMENSION || height > width * 256) {
reader.dispose()
return errorBitmap()
}
val image = reader.read(0)
reader.dispose()
image.toComposeImageBitmap()
} catch (e: Throwable) {
Log.e(TAG, "base64ToBitmap error: $e")
errorBitmap()