pub fn draw_text_mut<'a, C, F>(
    canvas: &'a mut C,
    color: C::Pixel,
    x: i32,
    y: i32,
    scale: PxScale,
    max_width: u32,
    font: F,
    text: &'a str,
) where
    C: Canvas,
    <C::Pixel as Pixel>::Subpixel: ValueInto<f32> + Clamp<f32>,
    F: Font,
{
    let scaled_font = font.as_scaled(scale);
    let mut glyphs = Vec::new();
    let position = point(x as f32, y as f32);
    layout_paragraph(scaled_font, position, text, &mut glyphs);

    let last_glyph = &glyphs[glyphs.len() - 1];
    let actual_width = last_glyph.position.x - (x as f32) + last_glyph.scale.x;
    if actual_width > max_width as f32 {
        let shrink_factor = actual_width / (max_width as f32);
        let new_scale = PxScale {
            x: scale.x / shrink_factor,
            y: scale.y,
        };
        glyphs.clear();
        let rescaled_font = font.as_scaled(new_scale);
        layout_paragraph(rescaled_font, position, text, &mut glyphs);
    }

    // Loop through the glyphs in the text, positing each one on a line
    for glyph in glyphs {
        if let Some(outlined) = scaled_font.outline_glyph(glyph) {
            let bounds = outlined.px_bounds();
            // Draw the glyph into the image per-pixel by using the draw closure
            outlined.draw(|x, y, v| {
                // Offset the position by the glyph bounding box
                let pixel_x = x + bounds.min.x as u32;
                let pixel_y = y + bounds.min.y as u32;
                let px = canvas.get_pixel(pixel_x, pixel_y);
                let weighted_color = weighted_sum(px, color, 1.0 - v, v);
                // Turn the coverage into an alpha value (blended with any previous)
                canvas.draw_pixel(pixel_x, pixel_y, weighted_color);
            });
        }
    }
}
/// Draws colored text on an image in place. `scale` is augmented font scaling on both the x and y axis (in pixels). Note that this function *does not* support newlines, you must do this manually
Draws colored text on an image in place. `scale` is augmented font scaling on both the x and y axis (in pixels). Note that this function *does not* support newlines, you must do this manually
Draws colored text on an image in place . ` scale ` is augmented font scaling on both the x and y axis ( in pixels ) . Note that this function * does not * support newlines you must do this manually
pub fn draw_text_mut<'a, C, F>(
    canvas: &'a mut C,
    color: C::Pixel,
    x: i32,
    y: i32,
    scale: PxScale,
    max_width: u32,
    font: F,
    text: &'a str,
) where
    C: Canvas,
    <C::Pixel as Pixel>::Subpixel: ValueInto<f32> + Clamp<f32>,
    F: Font,
{
    let scaled_font = font.as_scaled(scale);
    let mut glyphs = Vec::new();
    let position = point(x as f32, y as f32);
    layout_paragraph(scaled_font, position, text, &mut glyphs);
    let last_glyph = &glyphs[glyphs.len() - 1];
    let actual_width = last_glyph.position.x - (x as f32) + last_glyph.scale.x;
    if actual_width > max_width as f32 {
        let shrink_factor = actual_width / (max_width as f32);
        let new_scale = PxScale {
            x: scale.x / shrink_factor,
            y: scale.y,
        };
        glyphs.clear();
        let rescaled_font = font.as_scaled(new_scale);
        layout_paragraph(rescaled_font, position, text, &mut glyphs);
    }
    // Loop through the glyphs in the text, positing each one on a line
    for glyph in glyphs {
        if let Some(outlined) = scaled_font.outline_glyph(glyph) {
            let bounds = outlined.px_bounds();
            // Draw the glyph into the image per-pixel by using the draw closure
            outlined.draw(|x, y, v| {
                // Offset the position by the glyph bounding box
                let pixel_x = x + bounds.min.x as u32;
                let pixel_y = y + bounds.min.y as u32;
                let px = canvas.get_pixel(pixel_x, pixel_y);
                let weighted_color = weighted_sum(px, color, 1.0 - v, v);
                // Turn the coverage into an alpha value (blended with any previous)
                canvas.draw_pixel(pixel_x, pixel_y, weighted_color);
            });
        }
    }
}
pub fn draw_text_mut < ' a , C , F > ( canvas : & ' a mut C , color : C :: Pixel , x : i32 , y : i32 , scale : PxScale , max_width : u32 , font : F , text : & ' a str , ) where C : Canvas , < C :: Pixel as Pixel > :: Subpixel : ValueInto < f32 > + Clamp < f32 > , F : Font , { let scaled_font = font . as_scaled ( scale ) ; let mut glyphs = Vec :: new ( ) ; let position = point ( x as f32 , y as f32 ) ; layout_paragraph ( scaled_font , position , text , & mut glyphs ) ; let last_glyph = & glyphs [ glyphs . len ( ) - 1 ] ; let actual_width = last_glyph . position . x - ( x as f32 ) + last_glyph . scale . x ; if actual_width > max_width as f32 { let shrink_factor = actual_width / ( max_width as f32 ) ; let new_scale = PxScale { x : scale . x / shrink_factor , y : scale . y , } ; glyphs . clear ( ) ; let rescaled_font = font . as_scaled ( new_scale ) ; layout_paragraph ( rescaled_font , position , text , & mut glyphs ) ; } // Loop through the glyphs in the text, positing each one on a line for glyph in glyphs { if let Some ( outlined ) = scaled_font . outline_glyph ( glyph ) { let bounds = outlined . px_bounds ( ) ; // Draw the glyph into the image per-pixel by using the draw closure outlined . draw ( | x , y , v | { // Offset the position by the glyph bounding box let pixel_x = x + bounds . min . x as u32 ; let pixel_y = y + bounds . min . y as u32 ; let px = canvas . get_pixel ( pixel_x , pixel_y ) ; let weighted_color = weighted_sum ( px , color , 1.0 - v , v ) ; // Turn the coverage into an alpha value (blended with any previous) canvas . draw_pixel ( pixel_x , pixel_y , weighted_color ) ; } ) ; } } }
Draws colored text on an image in place.
Draws colored text on an image in place .
canvas
&'a mut C
color
C::Pixel
x
i32
y
i32
scale
PxScale
max_width
u32
font
F
text
&'a str
canvas
&'a mut C
color
C::Pixel
x
i32
y
i32
scale
PxScale
max_width
u32
font
F
text
&'a str