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|
#![forbid(unsafe_code)]
//! SDL platform adapter boundary stubs behind safe `FParkan` ports.
use fparkan_platform::{
EventSource, GraphicsContextRequest, GraphicsProfile, PhysicalSize, PlatformError,
PlatformEvent, Version, WindowPort,
};
/// Adapter capabilities compiled into this package.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct SdlAdapterCapabilities {
/// Supported graphics context requests in preference order.
pub graphics: Vec<GraphicsContextRequest>,
/// Whether adapter-owned code is free of `unsafe`.
pub project_owned_unsafe_free: bool,
}
impl Default for SdlAdapterCapabilities {
fn default() -> Self {
Self {
graphics: vec![
GraphicsContextRequest {
profile: GraphicsProfile::DesktopCore,
version: Version { major: 3, minor: 3 },
},
GraphicsContextRequest {
profile: GraphicsProfile::Embedded,
version: Version { major: 2, minor: 0 },
},
],
project_owned_unsafe_free: true,
}
}
}
/// Returns whether the project-owned adapter boundary avoids `unsafe`.
#[must_use]
pub fn project_owned_layer_unsafe_free() -> bool {
SdlAdapterCapabilities::default().project_owned_unsafe_free
}
/// In-memory event source used by adapter smoke tests before a concrete SDL
/// runtime is selected.
#[derive(Clone, Debug, Default)]
pub struct SdlEventSourceStub {
pending: Vec<PlatformEvent>,
}
impl SdlEventSourceStub {
/// Creates an event source with deterministic pending events.
#[must_use]
pub fn new(pending: Vec<PlatformEvent>) -> Self {
Self { pending }
}
}
impl EventSource for SdlEventSourceStub {
fn poll(&mut self, out: &mut Vec<PlatformEvent>) -> Result<(), PlatformError> {
out.append(&mut self.pending);
Ok(())
}
}
/// Safe window-port stub with SDL-compatible drawable-size semantics.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct SdlWindowStub {
size: PhysicalSize,
presents: u64,
}
impl SdlWindowStub {
/// Creates a stub window with a fixed drawable size.
#[must_use]
pub fn new(size: PhysicalSize) -> Self {
Self { size, presents: 0 }
}
/// Number of successful present calls.
#[must_use]
pub fn presents(&self) -> u64 {
self.presents
}
}
impl WindowPort for SdlWindowStub {
fn drawable_size(&self) -> PhysicalSize {
self.size
}
fn present(&mut self) -> Result<(), PlatformError> {
self.presents = self.presents.saturating_add(1);
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn adapter_boundary_is_project_owned_unsafe_free() {
assert!(project_owned_layer_unsafe_free());
assert_eq!(SdlAdapterCapabilities::default().graphics.len(), 2);
}
#[test]
fn event_source_and_window_ports_are_deterministic() -> Result<(), PlatformError> {
let mut source = SdlEventSourceStub::new(vec![PlatformEvent::Quit]);
let mut events = Vec::new();
source.poll(&mut events)?;
source.poll(&mut events)?;
assert_eq!(events, vec![PlatformEvent::Quit]);
let mut window = SdlWindowStub::new(PhysicalSize {
width: 320,
height: 240,
});
assert_eq!(window.drawable_size().width, 320);
window.present()?;
assert_eq!(window.presents(), 1);
Ok(())
}
}
|
