2019-05-24 20:45:19 -04:00
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// pathfinder/c/src/lib.rs
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//
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// Copyright © 2019 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! C bindings to Pathfinder.
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use gl;
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use pathfinder_canvas::{CanvasFontContext, CanvasRenderingContext2D, LineJoin};
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use pathfinder_canvas::{Path2D, TextMetrics};
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use pathfinder_geometry::basic::rect::{RectF, RectI};
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use pathfinder_geometry::basic::vector::{Vector2F, Vector2I};
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use pathfinder_geometry::color::ColorF;
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use pathfinder_geometry::outline::ArcDirection;
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use pathfinder_geometry::stroke::LineCap;
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use pathfinder_gl::{GLDevice, GLVersion};
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use pathfinder_gpu::resources::{FilesystemResourceLoader, ResourceLoader};
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use pathfinder_renderer::concurrent::rayon::RayonExecutor;
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use pathfinder_renderer::concurrent::scene_proxy::SceneProxy;
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use pathfinder_renderer::gpu::options::{DestFramebuffer, RendererOptions};
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use pathfinder_renderer::gpu::renderer::Renderer;
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use pathfinder_renderer::options::BuildOptions;
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use pathfinder_renderer::scene::Scene;
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use pathfinder_simd::default::F32x4;
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use std::ffi::CString;
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use std::os::raw::{c_char, c_void};
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use std::slice;
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use std::str;
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// Constants
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// `canvas`
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pub const PF_LINE_CAP_BUTT: u8 = 0;
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pub const PF_LINE_CAP_SQUARE: u8 = 1;
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pub const PF_LINE_CAP_ROUND: u8 = 2;
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pub const PF_LINE_JOIN_MITER: u8 = 0;
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pub const PF_LINE_JOIN_BEVEL: u8 = 1;
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pub const PF_LINE_JOIN_ROUND: u8 = 2;
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// `geometry`
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pub const PF_ARC_DIRECTION_CW: u8 = 0;
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pub const PF_ARC_DIRECTION_CCW: u8 = 1;
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// `renderer`
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pub const PF_RENDERER_OPTIONS_FLAGS_HAS_BACKGROUND_COLOR: u8 = 0x1;
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// Types
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// `canvas`
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pub type PFCanvasRef = *mut CanvasRenderingContext2D;
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pub type PFPathRef = *mut Path2D;
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pub type PFCanvasFontContextRef = *mut CanvasFontContext;
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pub type PFLineCap = u8;
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pub type PFLineJoin = u8;
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pub type PFArcDirection = u8;
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#[repr(C)]
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pub struct PFTextMetrics {
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pub width: f32,
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}
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// `geometry`
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#[repr(C)]
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pub struct PFVector2F {
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pub x: f32,
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pub y: f32,
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}
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#[repr(C)]
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pub struct PFVector2I {
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pub x: i32,
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pub y: i32,
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}
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#[repr(C)]
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pub struct PFRectF {
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pub origin: PFVector2F,
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pub lower_right: PFVector2F,
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}
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#[repr(C)]
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pub struct PFRectI {
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pub origin: PFVector2I,
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pub lower_right: PFVector2I,
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}
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#[repr(C)]
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pub struct PFColorF {
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pub r: f32,
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pub g: f32,
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pub b: f32,
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pub a: f32,
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}
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// `gl`
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pub type PFGLDeviceRef = *mut GLDevice;
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pub type PFGLVersion = GLVersion;
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pub type PFGLFunctionLoader = extern "C" fn(name: *const c_char, userdata: *mut c_void)
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-> *const c_void;
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// `gpu`
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pub type PFGLDestFramebufferRef = *mut DestFramebuffer<GLDevice>;
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pub type PFGLRendererRef = *mut Renderer<GLDevice>;
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// FIXME(pcwalton): Double-boxing is unfortunate. Remove this when `std::raw::TraitObject` is
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// stable?
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pub type PFResourceLoaderRef = *mut Box<dyn ResourceLoader>;
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// `renderer`
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pub type PFSceneRef = *mut Scene;
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pub type PFSceneProxyRef = *mut SceneProxy;
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#[repr(C)]
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pub struct PFRendererOptions {
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pub background_color: PFColorF,
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pub flags: PFRendererOptionsFlags,
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}
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pub type PFRendererOptionsFlags = u8;
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// TODO(pcwalton)
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#[repr(C)]
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pub struct PFBuildOptions {
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pub placeholder: u32,
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}
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// `canvas`
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2019-06-04 18:00:22 -04:00
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/// Consumes the font context.
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasCreate(font_context: PFCanvasFontContextRef,
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size: *const PFVector2F)
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-> PFCanvasRef {
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Box::into_raw(Box::new(CanvasRenderingContext2D::new(*Box::from_raw(font_context),
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(*size).to_rust())))
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasDestroy(canvas: PFCanvasRef) {
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drop(Box::from_raw(canvas))
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasFontContextCreate() -> PFCanvasFontContextRef {
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Box::into_raw(Box::new(CanvasFontContext::new()))
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasFontContextDestroy(font_context: PFCanvasFontContextRef) {
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drop(Box::from_raw(font_context))
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}
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2019-06-04 17:55:26 -04:00
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasFontContextClone(font_context: PFCanvasFontContextRef)
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-> PFCanvasFontContextRef {
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Box::into_raw(Box::new((*font_context).clone()))
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}
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/// Consumes the canvas.
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasCreateScene(canvas: PFCanvasRef) -> PFSceneRef {
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Box::into_raw(Box::new(Box::from_raw(canvas).into_scene()))
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}
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// Drawing rectangles
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasFillRect(canvas: PFCanvasRef, rect: *const PFRectF) {
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(*canvas).fill_rect((*rect).to_rust())
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasStrokeRect(canvas: PFCanvasRef, rect: *const PFRectF) {
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(*canvas).stroke_rect((*rect).to_rust())
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}
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// Drawing text
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasFillText(canvas: PFCanvasRef,
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string: *const c_char,
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string_len: usize,
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position: *const PFVector2F) {
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(*canvas).fill_text(to_rust_string(&string, string_len), (*position).to_rust())
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasStrokeText(canvas: PFCanvasRef,
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string: *const c_char,
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string_len: usize,
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position: *const PFVector2F) {
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(*canvas).stroke_text(to_rust_string(&string, string_len), (*position).to_rust())
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasMeasureText(canvas: PFCanvasRef,
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string: *const c_char,
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string_len: usize,
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out_text_metrics: *mut PFTextMetrics) {
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debug_assert!(!out_text_metrics.is_null());
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*out_text_metrics = (*canvas).measure_text(to_rust_string(&string, string_len)).to_c()
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasSetLineWidth(canvas: PFCanvasRef, new_line_width: f32) {
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(*canvas).set_line_width(new_line_width)
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}
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2019-05-31 00:28:52 -04:00
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasSetLineCap(canvas: PFCanvasRef, new_line_cap: PFLineCap) {
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(*canvas).set_line_cap(match new_line_cap {
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PF_LINE_CAP_SQUARE => LineCap::Square,
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PF_LINE_CAP_ROUND => LineCap::Round,
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_ => LineCap::Butt,
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});
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}
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2019-06-20 16:01:54 -04:00
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasSetLineJoin(canvas: PFCanvasRef, new_line_join: PFLineJoin) {
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(*canvas).set_line_join(match new_line_join {
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PF_LINE_JOIN_BEVEL => LineJoin::Bevel,
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PF_LINE_JOIN_ROUND => LineJoin::Round,
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_ => LineJoin::Miter,
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});
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasSetMiterLimit(canvas: PFCanvasRef, new_miter_limit: f32) {
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(*canvas).set_miter_limit(new_miter_limit);
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasSetLineDash(canvas: PFCanvasRef,
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new_line_dashes: *const f32,
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new_line_dash_count: usize) {
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(*canvas).set_line_dash(slice::from_raw_parts(new_line_dashes, new_line_dash_count).to_vec())
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasSetLineDashOffset(canvas: PFCanvasRef, new_offset: f32) {
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(*canvas).set_line_dash_offset(new_offset)
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}
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/// Consumes the path.
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasFillPath(canvas: PFCanvasRef, path: PFPathRef) {
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(*canvas).fill_path(*Box::from_raw(path))
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}
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/// Consumes the path.
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#[no_mangle]
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pub unsafe extern "C" fn PFCanvasStrokePath(canvas: PFCanvasRef, path: PFPathRef) {
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(*canvas).stroke_path(*Box::from_raw(path))
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathCreate() -> PFPathRef {
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Box::into_raw(Box::new(Path2D::new()))
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathDestroy(path: PFPathRef) {
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drop(Box::from_raw(path))
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathClone(path: PFPathRef) -> PFPathRef {
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Box::into_raw(Box::new((*path).clone()))
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathMoveTo(path: PFPathRef, to: *const PFVector2F) {
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(*path).move_to((*to).to_rust())
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathLineTo(path: PFPathRef, to: *const PFVector2F) {
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(*path).line_to((*to).to_rust())
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathQuadraticCurveTo(path: PFPathRef,
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ctrl: *const PFVector2F,
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to: *const PFVector2F) {
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(*path).quadratic_curve_to((*ctrl).to_rust(), (*to).to_rust())
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathBezierCurveTo(path: PFPathRef,
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ctrl0: *const PFVector2F,
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ctrl1: *const PFVector2F,
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to: *const PFVector2F) {
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(*path).bezier_curve_to((*ctrl0).to_rust(), (*ctrl1).to_rust(), (*to).to_rust())
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}
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2019-06-20 18:51:25 -04:00
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#[no_mangle]
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pub unsafe extern "C" fn PFPathArc(path: PFPathRef,
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center: *const PFVector2F,
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radius: f32,
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start_angle: f32,
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end_angle: f32,
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direction: PFArcDirection) {
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let direction = if direction == 0 { ArcDirection::CW } else { ArcDirection::CCW };
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(*path).arc((*center).to_rust(), radius, start_angle, end_angle, direction)
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}
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#[no_mangle]
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pub unsafe extern "C" fn PFPathArcTo(path: PFPathRef,
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ctrl: *const PFVector2F,
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to: *const PFVector2F,
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radius: f32) {
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(*path).arc_to((*ctrl).to_rust(), (*to).to_rust(), radius)
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}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFPathRect(path: PFPathRef, rect: *const PFRectF) {
|
|
|
|
(*path).rect((*rect).to_rust())
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFPathEllipse(path: PFPathRef,
|
|
|
|
center: *const PFVector2F,
|
|
|
|
axes: *const PFVector2F,
|
|
|
|
rotation: f32,
|
|
|
|
start_angle: f32,
|
|
|
|
end_angle: f32) {
|
|
|
|
(*path).ellipse((*center).to_rust(), (*axes).to_rust(), rotation, start_angle, end_angle)
|
|
|
|
}
|
|
|
|
|
2019-05-24 20:45:19 -04:00
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFPathClosePath(path: PFPathRef) {
|
|
|
|
(*path).close_path()
|
|
|
|
}
|
|
|
|
|
|
|
|
// `gl`
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFFilesystemResourceLoaderLocate() -> PFResourceLoaderRef {
|
|
|
|
let loader = Box::new(FilesystemResourceLoader::locate());
|
|
|
|
Box::into_raw(Box::new(loader as Box<dyn ResourceLoader>))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFGLLoadWith(loader: PFGLFunctionLoader, userdata: *mut c_void) {
|
|
|
|
gl::load_with(|name| {
|
|
|
|
let name = CString::new(name).unwrap();
|
|
|
|
loader(name.as_ptr(), userdata)
|
|
|
|
});
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFGLDeviceCreate(version: PFGLVersion, default_framebuffer: u32)
|
|
|
|
-> PFGLDeviceRef {
|
|
|
|
Box::into_raw(Box::new(GLDevice::new(version, default_framebuffer)))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFGLDeviceDestroy(device: PFGLDeviceRef) {
|
|
|
|
drop(Box::from_raw(device))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFResourceLoaderDestroy(loader: PFResourceLoaderRef) {
|
|
|
|
drop(Box::from_raw(loader))
|
|
|
|
}
|
|
|
|
|
|
|
|
// `gpu`
|
|
|
|
|
|
|
|
#[no_mangle]
|
2019-06-03 15:39:29 -04:00
|
|
|
pub unsafe extern "C" fn PFGLDestFramebufferCreateFullWindow(window_size: *const PFVector2I)
|
2019-05-24 20:45:19 -04:00
|
|
|
-> PFGLDestFramebufferRef {
|
|
|
|
Box::into_raw(Box::new(DestFramebuffer::full_window((*window_size).to_rust())))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFGLDestFramebufferDestroy(dest_framebuffer: PFGLDestFramebufferRef) {
|
|
|
|
drop(Box::from_raw(dest_framebuffer))
|
|
|
|
}
|
|
|
|
|
|
|
|
/// Takes ownership of `device` and `dest_framebuffer`, but not `resources`.
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFGLRendererCreate(device: PFGLDeviceRef,
|
|
|
|
resources: PFResourceLoaderRef,
|
2019-06-05 17:35:46 -04:00
|
|
|
dest_framebuffer: PFGLDestFramebufferRef,
|
|
|
|
options: *const PFRendererOptions)
|
2019-05-24 20:45:19 -04:00
|
|
|
-> PFGLRendererRef {
|
|
|
|
Box::into_raw(Box::new(Renderer::new(*Box::from_raw(device),
|
|
|
|
&**resources,
|
2019-06-05 17:35:46 -04:00
|
|
|
*Box::from_raw(dest_framebuffer),
|
|
|
|
(*options).to_rust())))
|
2019-05-24 20:45:19 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFGLRendererDestroy(renderer: PFGLRendererRef) {
|
|
|
|
drop(Box::from_raw(renderer))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFGLRendererGetDevice(renderer: PFGLRendererRef) -> PFGLDeviceRef {
|
|
|
|
&mut (*renderer).device
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFSceneProxyBuildAndRenderGL(scene_proxy: PFSceneProxyRef,
|
|
|
|
renderer: PFGLRendererRef,
|
2019-06-05 17:35:46 -04:00
|
|
|
build_options: *const PFBuildOptions) {
|
|
|
|
(*scene_proxy).build_and_render(&mut *renderer, (*build_options).to_rust())
|
2019-05-24 20:45:19 -04:00
|
|
|
}
|
|
|
|
|
|
|
|
// `renderer`
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFSceneDestroy(scene: PFSceneRef) {
|
|
|
|
drop(Box::from_raw(scene))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFSceneProxyCreateFromSceneAndRayonExecutor(scene: PFSceneRef)
|
|
|
|
-> PFSceneProxyRef {
|
|
|
|
Box::into_raw(Box::new(SceneProxy::from_scene(*Box::from_raw(scene), RayonExecutor)))
|
|
|
|
}
|
|
|
|
|
|
|
|
#[no_mangle]
|
|
|
|
pub unsafe extern "C" fn PFSceneProxyDestroy(scene_proxy: PFSceneProxyRef) {
|
|
|
|
drop(Box::from_raw(scene_proxy))
|
|
|
|
}
|
|
|
|
|
2019-06-20 19:07:38 -04:00
|
|
|
// Helpers for `canvas`
|
|
|
|
|
|
|
|
unsafe fn to_rust_string(ptr: &*const c_char, mut len: usize) -> &str {
|
|
|
|
if len == 0 {
|
|
|
|
len = libc::strlen(*ptr);
|
|
|
|
}
|
|
|
|
str::from_utf8(slice::from_raw_parts(*ptr as *const u8, len)).unwrap()
|
|
|
|
}
|
|
|
|
|
|
|
|
trait TextMetricsExt {
|
|
|
|
fn to_c(&self) -> PFTextMetrics;
|
|
|
|
}
|
|
|
|
|
|
|
|
impl TextMetricsExt for TextMetrics {
|
|
|
|
fn to_c(&self) -> PFTextMetrics {
|
|
|
|
PFTextMetrics { width: self.width }
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-05-24 20:45:19 -04:00
|
|
|
// Helpers for `geometry`
|
|
|
|
|
|
|
|
impl PFColorF {
|
|
|
|
#[inline]
|
|
|
|
pub fn to_rust(&self) -> ColorF {
|
|
|
|
ColorF(F32x4::new(self.r, self.g, self.b, self.a))
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl PFRectF {
|
|
|
|
#[inline]
|
2019-05-29 22:13:42 -04:00
|
|
|
pub fn to_rust(&self) -> RectF {
|
|
|
|
RectF::from_points(self.origin.to_rust(), self.lower_right.to_rust())
|
2019-05-24 20:45:19 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl PFRectI {
|
|
|
|
#[inline]
|
2019-05-29 22:13:42 -04:00
|
|
|
pub fn to_rust(&self) -> RectI {
|
|
|
|
RectI::from_points(self.origin.to_rust(), self.lower_right.to_rust())
|
2019-05-24 20:45:19 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-06-03 15:39:29 -04:00
|
|
|
impl PFVector2F {
|
2019-05-24 20:45:19 -04:00
|
|
|
#[inline]
|
2019-06-03 15:39:29 -04:00
|
|
|
pub fn to_rust(&self) -> Vector2F {
|
|
|
|
Vector2F::new(self.x, self.y)
|
2019-05-24 20:45:19 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-06-03 15:39:29 -04:00
|
|
|
impl PFVector2I {
|
2019-05-24 20:45:19 -04:00
|
|
|
#[inline]
|
2019-06-03 15:39:29 -04:00
|
|
|
pub fn to_rust(&self) -> Vector2I {
|
|
|
|
Vector2I::new(self.x, self.y)
|
2019-05-24 20:45:19 -04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-06-05 17:35:46 -04:00
|
|
|
// Helpers for `renderer`
|
2019-05-24 20:45:19 -04:00
|
|
|
|
2019-06-05 17:35:46 -04:00
|
|
|
impl PFRendererOptions {
|
|
|
|
pub fn to_rust(&self) -> RendererOptions {
|
|
|
|
let has_background_color = self.flags & PF_RENDERER_OPTIONS_FLAGS_HAS_BACKGROUND_COLOR;
|
|
|
|
RendererOptions {
|
|
|
|
background_color: if has_background_color != 0 {
|
|
|
|
Some(self.background_color.to_rust())
|
2019-05-24 20:45:19 -04:00
|
|
|
} else {
|
|
|
|
None
|
|
|
|
},
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-06-05 17:35:46 -04:00
|
|
|
impl PFBuildOptions {
|
|
|
|
pub fn to_rust(&self) -> BuildOptions {
|
|
|
|
BuildOptions::default()
|
2019-05-24 20:45:19 -04:00
|
|
|
}
|
|
|
|
}
|