kitepdf-skia/io.github.yuroyami.kitepdf.skia/PdfPageRasterizer

PdfPageRasterizer

object PdfPageRasterizer

Headless raster output for a PdfPage using Skia (no Compose).

Typical use cases:

  • Server-side thumbnail / preview generation

  • "PDF → PNG" CLI converters

  • CI screenshot baselines for visual regression tests

  • Embedding rendered PDF previews into non-Compose JVM UIs (AWT, Swing, JavaFX) by drawing the returned Image / ByteArray through their own image APIs.

The result is a sRGB raster sized to the page in PDF user-space units (1pt = 1/72in) multiplied by scale. Pass scale = 2.0 for retina / "2× density" thumbnails.

Functions

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fun encodeToPng(page: <Error class: unknown class>, scale: Double = 1.0, background: Int = Color.WHITE): ByteArray

Convenience: render and return PNG bytes.

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fun renderToImage(page: <Error class: unknown class>, scale: Double = 1.0, background: Int = Color.WHITE): Image

Render page into a freshly-allocated Skia Image. The caller owns the returned object and should call close() (or use encodeToPng) once done — Skia images hold off-heap memory.