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pub mod freetype {
use ndless::prelude::*;
use unicode_segmentation::UnicodeSegmentation;
use crate::video::Color::{RGB, RGBA};
use crate::{video::Color, video::Surface, video::SurfaceFlag::SWSurface};
#[derive(Debug, PartialEq, Clone)]
pub struct Text<'a> {
text: String,
matrix: ndless_freetype::Matrix,
surface: Option<Surface>,
up_to_date: bool,
height: isize,
font: &'a ndless_freetype::Face,
color: Color,
}
impl<'a> Text<'a> {
pub fn new(font: &'a ndless_freetype::Face) -> Self {
Self {
text: "".to_string(),
matrix: Self::radians_to_matrix(0.),
surface: None,
up_to_date: false,
height: 40,
font,
color: RGB(0, 0, 0),
}
}
pub fn text(&mut self, str: impl Into<String>) -> &mut Self {
let str = str.into();
if str != self.text {
self.text = str;
self.up_to_date = false;
}
self
}
pub fn font(&mut self, font: &'a ndless_freetype::Face) -> &mut Self {
if font != self.font {
self.font = font;
self.up_to_date = false;
}
self
}
pub fn color(&mut self, color: Color) -> &mut Self {
if color != self.color {
self.color = color;
self.up_to_date = false;
}
self
}
pub fn height(&mut self, height: isize) -> &mut Self {
if height != self.height {
self.height = height;
self.up_to_date = false;
}
self
}
fn radians_to_matrix(angle: f64) -> ndless_freetype::Matrix {
ndless_freetype::Matrix {
xx: (angle.cos() * f64::from(0x10000)) as ndless_freetype::FT_Fixed,
xy: (-angle.sin() * f64::from(0x10000)) as ndless_freetype::FT_Fixed,
yx: (angle.sin() * f64::from(0x10000)) as ndless_freetype::FT_Fixed,
yy: (angle.cos() * f64::from(0x10000)) as ndless_freetype::FT_Fixed,
}
}
pub fn reallocate(&mut self) {
self.surface = None;
}
#[allow(clippy::many_single_char_names)]
pub fn render(&mut self) -> &Surface {
if self.up_to_date && self.surface.as_ref().is_some() {
return self.surface.as_ref().unwrap();
}
self.font.set_char_size(self.height * 64, 0, 50, 0).unwrap();
let chars = self.text.graphemes(true);
let mut pen = ndless_freetype::Vector { x: 0, y: 0 };
let mut max_height = 0;
let mut baseline_height = 0;
let mut max_width = 0;
let mut min_height = 0;
for letter in chars.clone() {
self.font.set_transform(&mut self.matrix, &mut pen);
self.font
.load_char(
letter.chars().next().unwrap() as usize,
ndless_freetype::face::LoadFlag::RENDER,
)
.unwrap();
let glyph = self.font.glyph();
let cbox = glyph.get_glyph().unwrap().get_cbox(0);
if cbox.xMax / 64 > max_width {
max_width = cbox.xMax / 64
}
if cbox.yMin / 64 < min_height {
min_height = cbox.yMin / 64
}
if cbox.yMax / 64 > max_height {
max_height = cbox.yMax / 64
}
let y = glyph.bitmap_top() as usize;
pen.x += glyph.advance().x;
pen.y += glyph.advance().y;
if y > baseline_height {
baseline_height = y;
}
}
let max_height = -min_height + max_height;
let reassign = match &self.surface {
Some(surface) => {
surface.get_width() < max_width as u16
|| surface.get_height() < max_height as u16
}
None => true,
};
if reassign {
self.surface = Some(
Surface::new(
&[SWSurface],
max_width as isize,
max_height as isize,
32,
0xFF00_0000,
0x00FF_0000,
0x0000_FF00,
0x0000_00FF,
)
.unwrap(),
);
} else {
self.surface.as_ref().unwrap().fill(RGBA(0, 0, 0, 0));
}
let scr = self.surface.as_ref().unwrap();
let mut pen = ndless_freetype::Vector { x: 0, y: 0 };
let max_width = scr.get_width();
let max_height = scr.get_height();
for letter in chars {
self.font.set_transform(&mut self.matrix, &mut pen);
self.font
.load_char(
letter.chars().next().unwrap() as usize,
ndless_freetype::face::LoadFlag::RENDER,
)
.unwrap();
let glyph = self.font.glyph();
let bitmap = glyph.bitmap();
let x = glyph.bitmap_left() as usize;
let y = baseline_height - glyph.bitmap_top() as usize;
let mut col = 0;
let width = bitmap.width() as usize;
let x_max = x + width;
let y_max = y + bitmap.rows() as usize;
for (row, x_scaled) in (x..x_max).enumerate() {
for y_scaled in y..y_max {
if x_scaled < max_width as usize && y_scaled < max_height as usize {
let alpha = bitmap.buffer()[col * width + row];
scr.fill_rect(
Some(crate::Rect {
x: x_scaled as i16,
y: y_scaled as i16,
w: 1,
h: 1,
}),
match self.color {
RGB(r, g, b) => RGBA(r, g, b, alpha),
RGBA(r, g, b, _) => RGBA(r, g, b, alpha),
},
);
col += 1;
}
}
col = 0;
}
pen.x += glyph.advance().x;
pen.y += glyph.advance().y;
}
scr
}
}
}