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Pixel-perfect fonts

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This commit is contained in:
Emil Ernerfeldt
2019-01-19 10:10:28 -06:00
parent cd8ca47e76
commit c2c94ddda5
14 changed files with 207 additions and 212 deletions
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22
emigui/src/mesher.rs
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@@ -1,5 +1,5 @@
const ANTI_ALIAS: bool = true;
const AA_SIZE: f32 = 1.0;
const AA_SIZE: f32 = 0.5; // TODO: 1.0 / pixels_per_point
/// Outputs render info in a format suitable for e.g. OpenGL.
use crate::{
@@ -336,23 +336,15 @@ impl Frame {
for (c, x_offset) in text.chars().zip(x_offsets.iter()) {
if let Some(glyph) = font.uv_rect(c) {
let mut top_left = Vertex {
pos: *pos
+ vec2(
x_offset + (glyph.offset.0 as f32),
glyph.offset.1 as f32,
),
uv: (glyph.min.0, glyph.min.1),
pos: *pos + glyph.offset + vec2(*x_offset, 0.0),
uv: glyph.min,
color: *color,
};
top_left.pos.x = top_left.pos.x.round(); // Pixel-perfection.
top_left.pos.y = top_left.pos.y.round(); // Pixel-perfection.
top_left.pos.x = font.round_to_pixel(top_left.pos.x); // Pixel-perfection.
top_left.pos.y = font.round_to_pixel(top_left.pos.y); // Pixel-perfection.
let bottom_right = Vertex {
pos: top_left.pos
+ vec2(
(1 + glyph.max.0 - glyph.min.0) as f32,
(1 + glyph.max.1 - glyph.min.1) as f32,
),
uv: (glyph.max.0 + 1, glyph.max.1 + 1),
pos: top_left.pos + glyph.size,
uv: glyph.max,
color: *color,
};
frame.add_rect(top_left, bottom_right);