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Add tessellation option to toggle rounding text to pixel coordinates

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On by default and only there for testing
This commit is contained in:
Emil Ernerfeldt 2021-10-27 08:56:06 +02:00
parent 8e4fd942a9
commit ddd52f47c5
2 changed files with 14 additions and 1 deletions
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4
egui/src/introspection.rs
View file

@ -136,6 +136,7 @@ impl Widget for &mut epaint::TessellationOptions {
aa_size: _, aa_size: _,
anti_alias, anti_alias,
coarse_tessellation_culling, coarse_tessellation_culling,
round_text_to_pixels,
debug_paint_clip_rects, debug_paint_clip_rects,
debug_paint_text_rects, debug_paint_text_rects,
debug_ignore_clip_rects, debug_ignore_clip_rects,
@ -147,6 +148,9 @@ impl Widget for &mut epaint::TessellationOptions {
coarse_tessellation_culling, coarse_tessellation_culling,
"Do coarse culling in the tessellator", "Do coarse culling in the tessellator",
); );
ui.checkbox(round_text_to_pixels, "Align text positions to pixel grid")
.on_hover_text("Most text already is, so don't expect to see a large change.");
ui.checkbox(debug_ignore_clip_rects, "Ignore clip rectangles"); ui.checkbox(debug_ignore_clip_rects, "Ignore clip rectangles");
ui.checkbox(debug_paint_clip_rects, "Paint clip rectangles"); ui.checkbox(debug_paint_clip_rects, "Paint clip rectangles");
ui.checkbox(debug_paint_text_rects, "Paint text bounds"); ui.checkbox(debug_paint_text_rects, "Paint text bounds");

11
epaint/src/tessellator.rs
View file

@ -274,6 +274,10 @@ pub struct TessellationOptions {
/// This likely makes /// This likely makes
pub coarse_tessellation_culling: bool, pub coarse_tessellation_culling: bool,
/// If `true` (default) align text to mesh grid.
/// This makes the text sharper on most platforms.
pub round_text_to_pixels: bool,
/// Output the clip rectangles to be painted. /// Output the clip rectangles to be painted.
pub debug_paint_clip_rects: bool, pub debug_paint_clip_rects: bool,
@ -291,6 +295,7 @@ impl Default for TessellationOptions {
aa_size: 1.0, aa_size: 1.0,
anti_alias: true, anti_alias: true,
coarse_tessellation_culling: true, coarse_tessellation_culling: true,
round_text_to_pixels: true,
debug_paint_text_rects: false, debug_paint_text_rects: false,
debug_paint_clip_rects: false, debug_paint_clip_rects: false,
debug_ignore_clip_rects: false, debug_ignore_clip_rects: false,
@ -311,7 +316,11 @@ impl TessellationOptions {
impl TessellationOptions { impl TessellationOptions {
#[inline(always)] #[inline(always)]
pub fn round_to_pixel(&self, point: f32) -> f32 { pub fn round_to_pixel(&self, point: f32) -> f32 {
(point * self.pixels_per_point).round() / self.pixels_per_point if self.round_text_to_pixels {
(point * self.pixels_per_point).round() / self.pixels_per_point
} else {
point
}
} }
} }