Trait DrawSharedImpl 

pub trait DrawSharedImpl: Any {
    type Draw: DrawImpl;

    // Required methods
    fn max_texture_dimension_2d(&self) -> u32;
    fn set_raster_config(&mut self, config: &RasterConfig);
    fn image_alloc(&mut self, size: (u32, u32)) -> Result<ImageId, AllocError>;
    fn image_upload(&mut self, id: ImageId, data: &[u8], format: ImageFormat);
    fn image_free(&mut self, id: ImageId);
    fn image_size(&self, id: ImageId) -> Option<(u32, u32)>;
    fn draw_image(
        &self,
        draw: &mut Self::Draw,
        pass: PassId,
        id: ImageId,
        rect: Quad,
    );
    fn draw_text(
        &mut self,
        draw: &mut Self::Draw,
        pass: PassId,
        pos: Vec2,
        bb: Quad,
        text: &TextDisplay,
        col: Rgba,
    );
    fn draw_text_effects(
        &mut self,
        draw: &mut Self::Draw,
        pass: PassId,
        pos: Vec2,
        bb: Quad,
        text: &TextDisplay,
        effects: &[Effect],
        colors: &[Rgba],
    );
}

Implementation target for DrawShared

This is typically used via SharedState.

Required Associated Types

type Draw: DrawImpl

Required Methods

fn max_texture_dimension_2d(&self) -> u32

Get the maximum 2D texture size

fn set_raster_config(&mut self, config: &RasterConfig)

Set font raster config

fn image_alloc(&mut self, size: (u32, u32)) -> Result<ImageId, AllocError>

Allocate an image

Use DrawSharedImpl::image_upload to set contents of the new image.

fn image_upload(&mut self, id: ImageId, data: &[u8], format: ImageFormat)

Upload an image to the GPU

This should be called at least once on each image before display. May be called again to update the image contents.

fn image_free(&mut self, id: ImageId)

Free an image allocation

fn image_size(&self, id: ImageId) -> Option<(u32, u32)>

Query an image’s size

fn draw_image( &self, draw: &mut Self::Draw, pass: PassId, id: ImageId, rect: Quad, )

Draw the image in the given rect

fn draw_text( &mut self, draw: &mut Self::Draw, pass: PassId, pos: Vec2, bb: Quad, text: &TextDisplay, col: Rgba, )

Draw text with a colour

fn draw_text_effects( &mut self, draw: &mut Self::Draw, pass: PassId, pos: Vec2, bb: Quad, text: &TextDisplay, effects: &[Effect], colors: &[Rgba], )

Draw text with effects

The effects list provides underlining/strikethrough information via Effect::flags and an index Effect::e. If effects is empty, this is equivalent to Self::draw_text.

Text colour lookup uses index e and is essentially: colors.get(e).unwrap_or(Rgba::BLACK).

Implementors