| 1 |
use std::ffi::CString;
|
| 2 |
use x11::xft::{XftColor, XftDraw, XftDrawStringUtf8, XftFont, XftFontOpenName};
|
| 3 |
use x11::xlib::{Colormap, Display, Drawable, Visual};
|
| 4 |
use x11::xrender::XRenderColor;
|
| 5 |
|
| 6 |
use crate::errors::X11Error;
|
| 7 |
|
| 8 |
pub struct Font {
|
| 9 |
xft_font: *mut XftFont,
|
| 10 |
display: *mut Display,
|
| 11 |
}
|
| 12 |
|
| 13 |
impl Font {
|
| 14 |
pub fn new(display: *mut Display, screen: i32, font_name: &str) -> Result<Self, X11Error> {
|
| 15 |
let font_name_cstr =
|
| 16 |
CString::new(font_name).map_err(|_| X11Error::FontLoadFailed(font_name.to_string()))?;
|
| 17 |
|
| 18 |
let xft_font = unsafe { XftFontOpenName(display, screen, font_name_cstr.as_ptr()) };
|
| 19 |
|
| 20 |
if xft_font.is_null() {
|
| 21 |
return Err(X11Error::FontLoadFailed(font_name.to_string()));
|
| 22 |
}
|
| 23 |
|
| 24 |
Ok(Font { xft_font, display })
|
| 25 |
}
|
| 26 |
|
| 27 |
pub fn height(&self) -> u16 {
|
| 28 |
unsafe {
|
| 29 |
let font = &*self.xft_font;
|
| 30 |
font.height as u16
|
| 31 |
}
|
| 32 |
}
|
| 33 |
|
| 34 |
pub fn ascent(&self) -> i16 {
|
| 35 |
unsafe {
|
| 36 |
let font = &*self.xft_font;
|
| 37 |
font.ascent as i16
|
| 38 |
}
|
| 39 |
}
|
| 40 |
|
| 41 |
pub fn text_width(&self, text: &str) -> u16 {
|
| 42 |
unsafe {
|
| 43 |
let mut extents = std::mem::zeroed();
|
| 44 |
x11::xft::XftTextExtentsUtf8(
|
| 45 |
self.display,
|
| 46 |
self.xft_font,
|
| 47 |
text.as_ptr(),
|
| 48 |
text.len() as i32,
|
| 49 |
&mut extents,
|
| 50 |
);
|
| 51 |
extents.width
|
| 52 |
}
|
| 53 |
}
|
| 54 |
}
|
| 55 |
|
| 56 |
impl Drop for Font {
|
| 57 |
fn drop(&mut self) {
|
| 58 |
unsafe {
|
| 59 |
if !self.xft_font.is_null() {
|
| 60 |
x11::xft::XftFontClose(self.display, self.xft_font);
|
| 61 |
}
|
| 62 |
}
|
| 63 |
}
|
| 64 |
}
|
| 65 |
|
| 66 |
pub struct FontDraw {
|
| 67 |
xft_draw: *mut XftDraw,
|
| 68 |
}
|
| 69 |
|
| 70 |
impl FontDraw {
|
| 71 |
pub fn new(
|
| 72 |
display: *mut Display,
|
| 73 |
drawable: Drawable,
|
| 74 |
visual: *mut Visual,
|
| 75 |
colormap: Colormap,
|
| 76 |
) -> Result<Self, X11Error> {
|
| 77 |
let xft_draw = unsafe { x11::xft::XftDrawCreate(display, drawable, visual, colormap) };
|
| 78 |
|
| 79 |
if xft_draw.is_null() {
|
| 80 |
return Err(X11Error::DrawCreateFailed);
|
| 81 |
}
|
| 82 |
|
| 83 |
Ok(FontDraw { xft_draw })
|
| 84 |
}
|
| 85 |
|
| 86 |
pub fn draw_text(&self, font: &Font, color: u32, x: i16, y: i16, text: &str) {
|
| 87 |
let red = ((color >> 16) & 0xFF) as u16;
|
| 88 |
let green = ((color >> 8) & 0xFF) as u16;
|
| 89 |
let blue = (color & 0xFF) as u16;
|
| 90 |
|
| 91 |
let render_color = XRenderColor {
|
| 92 |
red: red << 8 | red,
|
| 93 |
green: green << 8 | green,
|
| 94 |
blue: blue << 8 | blue,
|
| 95 |
alpha: 0xFFFF,
|
| 96 |
};
|
| 97 |
|
| 98 |
let mut xft_color: XftColor = unsafe { std::mem::zeroed() };
|
| 99 |
|
| 100 |
unsafe {
|
| 101 |
x11::xft::XftColorAllocValue(
|
| 102 |
x11::xft::XftDrawDisplay(self.xft_draw),
|
| 103 |
x11::xft::XftDrawVisual(self.xft_draw),
|
| 104 |
x11::xft::XftDrawColormap(self.xft_draw),
|
| 105 |
&render_color,
|
| 106 |
&mut xft_color,
|
| 107 |
);
|
| 108 |
|
| 109 |
XftDrawStringUtf8(
|
| 110 |
self.xft_draw,
|
| 111 |
&xft_color,
|
| 112 |
font.xft_font,
|
| 113 |
x as i32,
|
| 114 |
y as i32,
|
| 115 |
text.as_ptr(),
|
| 116 |
text.len() as i32,
|
| 117 |
);
|
| 118 |
|
| 119 |
x11::xft::XftColorFree(
|
| 120 |
x11::xft::XftDrawDisplay(self.xft_draw),
|
| 121 |
x11::xft::XftDrawVisual(self.xft_draw),
|
| 122 |
x11::xft::XftDrawColormap(self.xft_draw),
|
| 123 |
&mut xft_color,
|
| 124 |
);
|
| 125 |
}
|
| 126 |
}
|
| 127 |
}
|
| 128 |
|
| 129 |
impl Drop for FontDraw {
|
| 130 |
fn drop(&mut self) {
|
| 131 |
unsafe {
|
| 132 |
if !self.xft_draw.is_null() {
|
| 133 |
x11::xft::XftDrawDestroy(self.xft_draw);
|
| 134 |
}
|
| 135 |
}
|
| 136 |
}
|
| 137 |
}
|