diff options
Diffstat (limited to 'rust/wasm/src/compositor.rs')
| -rw-r--r-- | rust/wasm/src/compositor.rs | 50 |
1 files changed, 34 insertions, 16 deletions
diff --git a/rust/wasm/src/compositor.rs b/rust/wasm/src/compositor.rs index 55756a21..126c7468 100644 --- a/rust/wasm/src/compositor.rs +++ b/rust/wasm/src/compositor.rs @@ -131,22 +131,41 @@ pub fn render_frame(options: JsValue) -> Result<(), JsValue> { )); }; - let surface = gpu_runtime - .context - .instance() - .create_surface(wgpu::SurfaceTarget::Canvas(runtime.canvas.clone())) - .map_err(|error| JsValue::from_str(&error.to_string()))?; + if gpu_runtime.context.supports_surface_rendering() { + let surface = gpu_runtime + .context + .instance() + .create_surface(wgpu::SurfaceTarget::Canvas(runtime.canvas.clone())) + .map_err(|error| JsValue::from_str(&error.to_string()))?; - runtime - .compositor - .render_frame( - &gpu_runtime.context, - RenderFrameOptions { - frame: &frame, - surface: &surface, - }, - ) - .map_err(|error| JsValue::from_str(&error.to_string())) + runtime + .compositor + .render_frame( + &gpu_runtime.context, + RenderFrameOptions { + frame: &frame, + surface: &surface, + }, + ) + .map_err(|error| JsValue::from_str(&error.to_string())) + } else { + // WebGL cannot surface-render to an arbitrary canvas element. + // Composite to a texture, then blit to the canvas via the 2D context. + let texture = runtime + .compositor + .render_frame_to_texture(&gpu_runtime.context, &frame) + .map_err(|error| JsValue::from_str(&error.to_string()))?; + + gpu_runtime + .context + .render_texture_via_gl_canvas( + &texture, + &runtime.canvas, + frame.width, + frame.height, + ) + .map_err(|error| JsValue::from_str(&error.to_string())) + } }) }) } @@ -171,4 +190,3 @@ fn parse_upload_texture_options(value: JsValue) -> Result<UploadTextureOptions, height: read_u32_property(&object, "height")?, }) } - |