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use crate::{filled_circle_with_path_builder, PathBuilder, Point, StrokeStyle, Stroker};
type OutputVertex = crate::Vertex;
#[repr(C)]
pub struct VertexBuffer {
data: *const OutputVertex,
len: usize
}
#[no_mangle]
pub extern "C" fn aa_stroke_new(
style: &StrokeStyle,
output_ptr: *mut OutputVertex,
output_capacity: usize,
) -> *mut Stroker {
let mut s = Stroker::new(style);
if output_ptr != std::ptr::null_mut() {
let slice = unsafe { std::slice::from_raw_parts_mut(output_ptr, output_capacity) };
s.set_output_buffer(slice);
}
Box::into_raw(Box::new(s))
}
#[no_mangle]
pub extern "C" fn aa_stroke_move_to(s: &mut Stroker, x: f32, y: f32, closed: bool) {
s.move_to(Point::new(x, y), closed);
}
#[no_mangle]
pub extern "C" fn aa_stroke_line_to(s: &mut Stroker, x: f32, y: f32, end: bool) {
if end {
s.line_to_capped(Point::new(x, y))
} else {
s.line_to(Point::new(x, y));
}
}
#[no_mangle]
pub extern "C" fn aa_stroke_curve_to(s: &mut Stroker, c1x: f32, c1y: f32, c2x: f32, c2y: f32, x: f32, y: f32, end: bool) {
if end {
s.curve_to_capped(Point::new(c1x, c1y), Point::new(c2x, c2y), Point::new(x, y));
} else {
s.curve_to(Point::new(c1x, c1y), Point::new(c2x, c2y), Point::new(x, y));
}
}
/*
#[no_mangle]
pub extern "C" fn aa_stroke_quad_to(s: &mut Stroker, cx: f32, cy: f32, x: f32, y: f32) {
s.quad_to(cx, cy, x, y);
}*/
#[no_mangle]
pub extern "C" fn aa_stroke_close(s: &mut Stroker) {
s.close();
}
#[no_mangle]
pub extern "C" fn aa_stroke_finish(s: &mut Stroker) -> VertexBuffer {
let stroked_path = s.get_stroked_path();
if let Some(output_buffer_size) = stroked_path.get_output_buffer_size() {
// if let Some(output_buffer) = stroked_path.output_buffer {
// dbg!(&output_buffer[0..output_buffer_size]);
// }
VertexBuffer {
data: std::ptr::null(),
len: output_buffer_size,
}
} else {
let result = s.finish();
let len = result.len();
let vb = VertexBuffer { data: Box::leak(result).as_ptr(), len };
vb
}
}
#[no_mangle]
pub extern "C" fn aa_stroke_vertex_buffer_release(vb: VertexBuffer)
{
if vb.data != std::ptr::null() {
unsafe {
drop(Box::from_raw(std::slice::from_raw_parts_mut(vb.data as *mut OutputVertex, vb.len)));
}
}
}
#[no_mangle]
pub unsafe extern "C" fn aa_stroke_release(s: *mut Stroker) {
drop(Box::from_raw(s));
}
#[no_mangle]
pub extern "C" fn aa_stroke_filled_circle(
cx: f32, cy: f32, radius: f32, output_ptr: *mut OutputVertex, output_capacity: usize
) -> VertexBuffer {
let mut path_builder = PathBuilder::new(1.);
if output_ptr != std::ptr::null_mut() {
let slice = unsafe { std::slice::from_raw_parts_mut(output_ptr, output_capacity) };
path_builder.set_output_buffer(slice);
}
filled_circle_with_path_builder(&mut path_builder, Point::new(cx, cy), radius);
if let Some(output_buffer_size) = path_builder.get_output_buffer_size() {
VertexBuffer {
data: std::ptr::null(),
len: output_buffer_size,
}
} else {
let result = path_builder.finish();
let len = result.len();
let vb = VertexBuffer { data: Box::leak(result).as_ptr(), len };
vb
}
}
#[test]
fn simple() {
let style = StrokeStyle::default();
let s = unsafe { &mut *aa_stroke_new(&style, std::ptr::null_mut(), 0) } ;
aa_stroke_move_to(s, 10., 10., false);
aa_stroke_line_to(s, 100., 100., false);
aa_stroke_line_to(s, 100., 10., true);
let vb = aa_stroke_finish(s);
aa_stroke_vertex_buffer_release(vb);
unsafe { aa_stroke_release(s) } ;
}
#[test]
fn output_buffer() {
let style = StrokeStyle::default();
let mut output = Vec::new();
output.resize_with(1000, || OutputVertex{x: 0., y: 0., coverage: 0.});
let s = unsafe { &mut *aa_stroke_new(&style, output.as_mut_ptr(), output.len()) } ;
aa_stroke_move_to(s, 10., 10., false);
aa_stroke_line_to(s, 100., 100., false);
aa_stroke_line_to(s, 100., 10., true);
let vb = aa_stroke_finish(s);
assert_ne!(vb.len, 0);
assert_eq!(vb.data, std::ptr::null());
aa_stroke_vertex_buffer_release(vb);
unsafe { aa_stroke_release(s) } ;
}
#[test]
fn filled_circle_output_buffer() {
use crate::Vertex;
let mut output = Vec::new();
output.resize_with(1000, || OutputVertex{x: 0., y: 0., coverage: 0.});
let center = Point::new(100., 100.);
let radius = 33.;
let vb = aa_stroke_filled_circle(center.x, center.y, radius, output.as_mut_ptr(), output.len());
assert_ne!(vb.len, 0);
assert_eq!(vb.data, std::ptr::null());
let result = &output[0..vb.len];
let min_x = result.iter().map(|v: &Vertex| v.x).reduce(|a, b| a.min(b)).unwrap();
let max_x = result.iter().map(|v: &Vertex| v.x).reduce(|a, b| a.max(b)).unwrap();
let min_y = result.iter().map(|v: &Vertex| v.y).reduce(|a, b| a.min(b)).unwrap();
let max_y = result.iter().map(|v: &Vertex| v.y).reduce(|a, b| a.max(b)).unwrap();
assert_eq!(min_x, center.x - (radius + 0.5));
assert_eq!(max_x, center.x + (radius + 0.5));
assert_eq!(min_y, center.y - (radius + 0.5));
assert_eq!(max_y, center.y + (radius + 0.5));
}