pdfpreview/com.harissk.pdfpreview.thumbnail/PDFThumbnailGenerator

PDFThumbnailGenerator

object PDFThumbnailGenerator

Utility class for generating PDF thumbnails from various document sources.

This class provides static methods to generate thumbnails from PDF documents using different sources like File, Uri, ByteArray, InputStream, or asset paths. All operations are performed on background threads for optimal performance.

Example usage:

// Generate a simple thumbnail
val thumbnail = PDFThumbnailGenerator.generateThumbnail(context, file)

// Generate with custom configuration
val config = ThumbnailConfig(
    width = 300,
    height = 400,
    quality = Bitmap.Config.ARGB_8888,
    annotationRendering = true
)
val thumbnail = PDFThumbnailGenerator.generateThumbnail(context, file, config = config)

// Generate multiple thumbnails
val thumbnails = PDFThumbnailGenerator.generateThumbnails(
    context, file, listOf(0, 1, 2)
)
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Functions

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fun clearCache()

Clears the thumbnail cache to free memory.

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suspend fun generateThumbnail(context: Context, source: Any, pageIndex: Int = 0, config: ThumbnailConfig = ThumbnailConfig(), password: String? = null, useCache: Boolean = true): Bitmap?

Generates a thumbnail for a specific page of a PDF document.

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suspend fun generateThumbnails(context: Context, source: Any, pageIndices: List<Int>, config: ThumbnailConfig = ThumbnailConfig(), password: String? = null, useCache: Boolean = true): List<Bitmap?>

Generates thumbnails for multiple pages of a PDF document.

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fun getCacheSize(): Int

Gets the current cache size in KB.

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suspend fun getPageCount(context: Context, source: Any, password: String? = null): Int

Gets the total number of pages in a PDF document.