Struct DiagnosticTextRenderer 

pub struct DiagnosticTextRenderer { /* private fields */ }

A class used to render diagnostic strings (only!), with caching of ASCII glyph runs. Digits are laid out in equal-width cells so rapidly changing values do not make the text jump around.

Implementations

impl DiagnosticTextRenderer

pub fn get_max_height(&self) -> f64

pub fn digit_cell_width(&self) -> f64

The width of the cell every digit is centered in.

pub fn new(glyph_run_source: Rc<dyn IDiagnosticGlyphRunSource>) -> Self

pub fn from_glyph_typeface( glyph_typeface: Rc<GlyphTypeface>, font_rendering_em_size: f64, ) -> Self

Creates a renderer whose glyph runs are built from glyph_typeface at font_rendering_em_size (the C# constructor).

pub fn create_default() -> Self

Creates the renderer the compositor’s debug overlays use: the glyph typeface of the default typeface at an em size of 12.

pub fn shape(&self, text: &str) -> ShapedText

Shapes text into a single glyph run that can be drawn with draw_shaped_text without any per-frame measuring or shaping. Every UTF-16 code unit outside the printable ASCII range is shaped as a space. Glyphs advance by their natural width, so digits are not placed in cells; use draw_digits for values that change.

pub fn shape_label(&self, text: &'static str) -> Rc<ShapedText>

The label text shaped by shape, shaped the first time and shared after that. Not in the reference: the port shapes the fixed labels of the FPS counter on the UI thread with this, where the glyph runs can be created (ServerCompositor::diagnostic_text_renderer).

pub fn draw_shaped_text( &self, context: &mut dyn IDrawingContextImpl, text: &ShapedText, foreground: &dyn IImmutableBrush, )

Draws text shaped by shape at the origin of the current transform of context.

pub fn draw_digits( &self, context: &mut dyn IDrawingContextImpl, value: i32, digit_count: i32, foreground: &dyn IImmutableBrush, )

Draws a non-negative value zero padded to digit_count digits, each in its own digit_cell_width wide cell, without formatting a string. Values that do not fit are clamped to the largest representable value.

pub fn measure_ascii_text(&self, text: &str) -> Size

Measures text. Every UTF-16 code unit outside the printable ASCII range is measured as a space.

pub fn draw_ascii_text( &self, context: &mut dyn IDrawingContextImpl, text: &str, foreground: &dyn IImmutableBrush, )

Draws text at the origin of the current transform of context. Every UTF-16 code unit outside the printable ASCII range is drawn as a space.