kitepdf-native-renderer/io.github.yuroyami.kitepdf.nativerenderer/Canvas2dCanvas

Canvas2dCanvas

class Canvas2dCanvas(ctx: <Error class: unknown class>)

PdfCanvas backed by a browser-side CanvasRenderingContext2D. Pure Kotlin/JS + DOM — no Compose for Web, no Skia/WASM bundle.

The right choice for in-browser PDF viewers that want minimal bundle size and to inherit whatever rendering acceleration the browser already provides for <canvas>.

Honest scope:

Path operations, gradients, blend modes (all 16), clipping, transparency groups, soft masks: ✅ rendered via the standard Canvas2D API.
Embedded image XObjects: ⚠️ JPEG / JP2 are decoded asynchronously by the browser (HTMLImageElement.src = …), which doesn't fit the renderer's synchronous draw pass. v1 paints placeholders for image XObjects; an async render path is roadmapped.

Constructors

Canvas2dCanvas

constructor(ctx: <Error class: unknown class>)

Functions

applySoftMask

open fun applySoftMask(kind: <Error class: unknown class>, maskBBox: <Error class: unknown class>, maskCtm: <Error class: unknown class>, render: () -> Unit, renderMask: (<Error class: unknown class>) -> Unit)

beginPage

open fun beginPage(widthPt: Double, heightPt: Double, deviceCtm: <Error class: unknown class>)

beginTransparencyGroup

open fun beginTransparencyGroup(bbox: <Error class: unknown class>, ctm: <Error class: unknown class>, isolated: Boolean, knockout: Boolean, alpha: Double, blendMode: <Error class: unknown class>)

drawImage

open fun drawImage(image: <Error class: unknown class>, ctm: <Error class: unknown class>, alpha: Double)

drawText

open fun drawText(bytes: ByteArray, font: <Error class: unknown class>, fontSize: Double, textMatrix: <Error class: unknown class>, fillColor: <Error class: unknown class>, alpha: Double, blendMode: <Error class: unknown class>)

endPage

open fun endPage()

endTransparencyGroup

open fun endTransparencyGroup()

fillPath

open fun fillPath(path: <Error class: unknown class>, ctm: <Error class: unknown class>, color: <Error class: unknown class>, evenOdd: Boolean, alpha: Double, blendMode: <Error class: unknown class>)

fillShading

open fun fillShading(shading: <Error class: unknown class>, ctm: <Error class: unknown class>, clipPath: <Error class: unknown class>?, alpha: Double, blendMode: <Error class: unknown class>)

popClip

open fun popClip()

pushClip

open fun pushClip(path: <Error class: unknown class>, ctm: <Error class: unknown class>, evenOdd: Boolean)

strokePath

open fun strokePath(path: <Error class: unknown class>, ctm: <Error class: unknown class>, color: <Error class: unknown class>, lineWidth: Double, alpha: Double, blendMode: <Error class: unknown class>, dashArray: List<Double>?, dashPhase: Double)