134 lines
3.0 KiB
Rust
134 lines
3.0 KiB
Rust
//! Implemented interfaces for Rozinante.
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use cairo_sys::*;
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use gdk_pixbuf_sys::*;
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use gdk_sys::*;
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use maraiah::{c_str, durandal::{ffi::*, image::*}, rozinante::draw::*};
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/// Converts a `Color` to a `f64` triple.
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fn flt_color(cr: impl Color) -> (f64, f64, f64)
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{
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fn flt_color(n: u16) -> f64 {f64::from(n) / f64::from(u16::max_value())}
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(flt_color(cr.r()), flt_color(cr.g()), flt_color(cr.b()))
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}
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impl CacheImage for CrImage
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{
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fn w(&self) -> Coord {unsafe {gdk_pixbuf_get_width(self.0) as Coord}}
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fn h(&self) -> Coord {unsafe {gdk_pixbuf_get_height(self.0) as Coord}}
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}
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impl CrDrawArea
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{
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pub const fn new(ctx: *mut cairo_t, w: f64, h: f64) -> Self
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{
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CrDrawArea{ctx, w: w as Coord, h: h as Coord}
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}
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}
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impl DrawArea for CrDrawArea
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{
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type NativeImage = CrImage;
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fn w(&self) -> Coord {self.w}
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fn h(&self) -> Coord {self.h}
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fn clear(&mut self, cr: impl Color)
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{
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self.rect(Rect{x: 0, y: 0, w: self.w(), h: self.h()}, cr);
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let sl = FONT_SLANT_NORMAL;
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let wt = FONT_WEIGHT_NORMAL;
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unsafe {
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cairo_select_font_face(self.ctx, c_str!("Monospace"), sl, wt);
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cairo_set_font_size(self.ctx, 14.0);
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cairo_set_line_width(self.ctx, 1.0);
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}
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}
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fn line_width(&mut self, width: u8)
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{
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let width = f64::from(width);
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unsafe {
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cairo_set_line_width(self.ctx, width);
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}
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}
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fn line(&mut self, p1: Point, p2: Point, cr: impl Color)
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{
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let (r, g, b) = flt_color(cr);
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let x1 = f64::from(p1.0);
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let y1 = f64::from(p1.1);
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let x2 = f64::from(p2.0);
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let y2 = f64::from(p2.1);
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unsafe {
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cairo_set_source_rgb(self.ctx, r, g, b);
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cairo_move_to(self.ctx, x1, y1);
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cairo_line_to(self.ctx, x2, y2);
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cairo_stroke(self.ctx);
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}
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}
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fn rect(&mut self, rect: Rect, cr: impl Color)
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{
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let px = f64::from(rect.x);
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let py = f64::from(rect.y);
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let sx = f64::from(rect.w);
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let sy = f64::from(rect.h);
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let (r, g, b) = flt_color(cr);
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unsafe {
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cairo_set_source_rgb(self.ctx, r, g, b);
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cairo_rectangle(self.ctx, px, py, sx, sy);
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cairo_fill(self.ctx);
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}
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}
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fn text(&mut self, pos: Point, text: &str, cr: impl Color)
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{
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let (r, g, b) = flt_color(cr);
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let x = f64::from(pos.0);
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let y = f64::from(pos.1);
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let text = CString::new(text).unwrap();
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unsafe {
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cairo_set_source_rgb(self.ctx, r, g, b);
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cairo_move_to(self.ctx, x, y);
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cairo_show_text(self.ctx, text.as_ptr());
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}
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}
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fn image(&mut self, pos: Point, im: &Self::NativeImage)
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{
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let x = f64::from(pos.0);
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let y = f64::from(pos.1);
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unsafe {
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gdk_cairo_set_source_pixbuf(self.ctx, im.0, x, y);
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cairo_paint(self.ctx);
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}
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}
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}
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/// An image for a `CrDrawArea`.
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pub struct CrImage(pub *const GdkPixbuf);
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/// A `DrawArea` for a Cairo surface.
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pub struct CrDrawArea
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{
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ctx: *mut cairo_t,
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w: Coord,
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h: Coord,
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}
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// EOF
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