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https://github.com/penpot/penpot.git
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48cec4c83b
- init_headless + RenderState::try_new_headless / Surfaces::try_new_headless: boot on CPU-raster placeholders, no GL context - render_shape_raster + render/raster.rs: CPU raster PNG export - CanvasCtx: GPU-free context shared by the PDF and raster canvas paths - get_fonts_for_shape + Shape/TextContent font enumeration - clear_fonts; ImageStore::without_gpu - _build_env: ENVIRONMENT=web,node so the module loads under Node
58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
use skia_safe as skia;
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use crate::error::{Error, Result};
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use crate::state::ShapesPoolRef;
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use crate::uuid::Uuid;
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use super::vector::{self, VectorTarget};
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use super::RenderState;
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/// Renders a shape tree to PNG bytes on a CPU raster surface (no GPU/WebGL),
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/// through the same `render_tree` used by the PDF backend. Returns
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/// `(png_bytes, width_px, height_px)`. With a headless `RenderState` this runs
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/// without a GL context.
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pub fn render_to_raster(
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shared: &mut RenderState,
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id: &Uuid,
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tree: ShapesPoolRef,
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scale: f32,
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) -> Result<(Vec<u8>, i32, i32)> {
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let Some(shape) = tree.get(id) else {
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return Ok((Vec::new(), 0, 0));
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};
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let bounds = shape.extrect(tree, scale);
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let width = (bounds.width() * scale).ceil() as i32;
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let height = (bounds.height() * scale).ceil() as i32;
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if width <= 0 || height <= 0 {
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return Ok((Vec::new(), 0, 0));
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}
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let mut surface = skia::surfaces::raster_n32_premul((width, height)).ok_or_else(|| {
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Error::CriticalError("Failed to create raster export surface".to_string())
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})?;
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{
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let canvas = surface.canvas();
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canvas.clear(skia::Color::TRANSPARENT);
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canvas.scale((scale, scale));
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canvas.translate((-bounds.left(), -bounds.top()));
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vector::render_tree(shared, canvas, id, tree, scale, VectorTarget::Raster)?;
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}
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let data = surface
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.image_snapshot()
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.encode(
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None::<&mut skia::gpu::DirectContext>,
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skia::EncodedImageFormat::PNG,
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100,
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)
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.ok_or_else(|| Error::CriticalError("PNG encode failed".to_string()))?;
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Ok((data.as_bytes().to_vec(), width, height))
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}
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#[cfg(all(test, not(target_arch = "wasm32")))]
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#[path = "raster_tests.rs"]
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mod tests;
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