Enum glyph_brush_draw_cache::ab_glyph::GlyphImageFormat

#[non_exhaustive]
pub enum GlyphImageFormat {
    Png,
    BitmapMono,
    BitmapMonoPacked,
    BitmapGray2,
    BitmapGray2Packed,
    BitmapGray4,
    BitmapGray4Packed,
    BitmapGray8,
    BitmapPremulBgra32,
}

Valid formats for a GlyphImage.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Png

BitmapMono

A monochrome bitmap.

The most significant bit of the first byte corresponds to the top-left pixel, proceeding through succeeding bits moving left to right. The data for each row is padded to a byte boundary, so the next row begins with the most significant bit of a new byte. 1 corresponds to black, and 0 to white.

BitmapMonoPacked

A packed monochrome bitmap.

The most significant bit of the first byte corresponds to the top-left pixel, proceeding through succeeding bits moving left to right. Data is tightly packed with no padding. 1 corresponds to black, and 0 to white.

BitmapGray2

A grayscale bitmap with 2 bits per pixel.

The most significant bits of the first byte corresponds to the top-left pixel, proceeding through succeeding bits moving left to right. The data for each row is padded to a byte boundary, so the next row begins with the most significant bit of a new byte.

BitmapGray2Packed

A packed grayscale bitmap with 2 bits per pixel.

The most significant bits of the first byte corresponds to the top-left pixel, proceeding through succeeding bits moving left to right. Data is tightly packed with no padding.

BitmapGray4

A grayscale bitmap with 4 bits per pixel.

The most significant bits of the first byte corresponds to the top-left pixel, proceeding through succeeding bits moving left to right. The data for each row is padded to a byte boundary, so the next row begins with the most significant bit of a new byte.

BitmapGray4Packed

A packed grayscale bitmap with 4 bits per pixel.

The most significant bits of the first byte corresponds to the top-left pixel, proceeding through succeeding bits moving left to right. Data is tightly packed with no padding.

BitmapGray8

A grayscale bitmap with 8 bits per pixel.

The first byte corresponds to the top-left pixel, proceeding through succeeding bytes moving left to right.

BitmapPremulBgra32

A color bitmap with 32 bits per pixel.

The first group of four bytes corresponds to the top-left pixel, proceeding through succeeding pixels moving left to right. Each byte corresponds to a color channel and the channels within a pixel are in blue, green, red, alpha order. Color values are pre-multiplied by the alpha. For example, the color “full-green with half translucency” is encoded as \x00\x80\x00\x80, and not \x00\xFF\x00\x80.

Trait Implementations

impl Clone for GlyphImageFormat

fn clone(&self) -> GlyphImageFormat

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GlyphImageFormat

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.