Supported Compose Features

Comprehensive matrix of Compose feature support in compose2pdf’s vector and raster rendering modes.

Text

Feature Vector Raster Notes
Basic text rendering Full Full Selectable in vector mode
Font weight (Normal, Bold) Full Full Bundled Inter covers both
Font style (Normal, Italic) Full Full Bundled Inter covers both
Font size (fontSize) Full Full  
Text color Full Full  
Underline Full Full  
Strikethrough Full Full  
Combined decorations Full Full Underline + strikethrough
Text alignment (Start, Center, End) Full Full  
Letter spacing Full Full  
Line height Full Full  
Max lines + ellipsis Full Full  
Text wrapping Full Full  

Layout

Feature Vector Raster Notes
Column Full Full  
Row Full Full  
Box Full Full  
Modifier.padding() Full Full  
Modifier.fillMaxSize/Width/Height Full Full  
Modifier.size/width/height Full Full  
Modifier.weight() Full Full  
Modifier.offset() Full Full  
Arrangement.spacedBy Full Full  
Arrangement.SpaceBetween Full Full  
Alignment.Center/Start/End Full Full  
Spacer Full Full  
Divider Full Full  

Shapes and Drawing

Feature Vector Raster Notes
Modifier.background(color) Full Full Solid colors
Modifier.border() Full Full  
Modifier.clip(RoundedCornerShape) Full Full Uniform corners
Modifier.clip(CircleShape) Full Full  
Modifier.clip() non-uniform corners Needs PdfRoundedCornerShape Full Standard shape loses info in SVG
Modifier.alpha() / opacity Full Full  
Canvas.drawCircle Full Full Filled and stroked
Canvas.drawRect Full Full  
Canvas.drawLine Full Full  
Canvas.drawArc Full Full  
Canvas.drawOval Full Full  
Canvas.drawPath Full Full moveTo, lineTo, cubicTo, quadTo
Stroke styles (width, cap, join) Full Full  
Dash patterns Full Full  

Images

Feature Vector Raster Notes
Image composable Full Full  
Image sizing Full Full  
Image clipping (circle, rounded) Full Full  
Multiple images per page Full Full  
Scaled images Full Full  
Transparent images Full Full Alpha channel preserved

compose2pdf-specific

Feature Vector Raster Notes
PdfLink annotations Full Full Clickable URLs in PDF
PdfRoundedCornerShape Full Full PDF-safe asymmetric corners
InterFontFamily Full N/A Font embedding (vector only)
Multi-page documents Full Full Manual pagination with known page count
Auto-pagination Full Full Content automatically flows across pages (up to 100)
OutputStream streaming Full Full Write PDF directly to a stream (Ktor, servlets, files)
PdfPagination.SINGLE_PAGE Full Full Clip content to one page (opt-in)

Limited or unsupported

Feature Vector Raster Notes
Gradients Limited Full SVGCanvas doesn’t preserve gradient definitions
Shadow / elevation No Limited Not converted to vector
LazyColumn / LazyRow No No Use Column / Row instead
Scrolling No No Pages are fixed-size
Animation N/A N/A Static snapshot only
TextField (input) No No PDF is static output
DropdownMenu No No Interactive component
Variable fonts No No Skipped by font resolver; use static .ttf/.otf
Per-page headers/footers (auto-pagination) No No Use manual pagination for fixed page chrome

“Limited” for gradients in vector mode means Skia may rasterize the gradient area before emitting it as SVG, resulting in a bitmap section within an otherwise vector PDF. Raster mode handles gradients pixel-perfectly.

See also