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RenderBackend

truce_loader

Trait RenderBackend 

Source 
pub trait RenderBackend {
    // Required methods
    fn clear(&mut self, color: Color);
    fn fill_rect(&mut self, x: f32, y: f32, w: f32, h: f32, color: Color);
    fn fill_circle(&mut self, cx: f32, cy: f32, radius: f32, color: Color);
    fn stroke_circle(
        &mut self,
        cx: f32,
        cy: f32,
        radius: f32,
        color: Color,
        width: f32,
    );
    fn stroke_arc(
        &mut self,
        cx: f32,
        cy: f32,
        radius: f32,
        start_angle: f32,
        end_angle: f32,
        color: Color,
        width: f32,
    );
    fn draw_line(
        &mut self,
        x1: f32,
        y1: f32,
        x2: f32,
        y2: f32,
        color: Color,
        width: f32,
    );
    fn draw_text(&mut self, text: &str, x: f32, y: f32, size: f32, color: Color);
    fn text_width(&self, text: &str, size: f32) -> f32;

    // Provided method
    fn present(&mut self) { ... }
}
Expand description

Abstraction over rendering backends (CPU via tiny-skia, future GPU via wgpu).

All coordinates are in pixels. The CPU backend renders to an in-memory RGBA buffer; a GPU backend would render via Metal/DX12/Vulkan.

Required Methods§

Source

fn clear(&mut self, color: Color)

Clear the entire surface with a solid color.

Source

fn fill_rect(&mut self, x: f32, y: f32, w: f32, h: f32, color: Color)

Fill a rectangle.

Source

fn fill_circle(&mut self, cx: f32, cy: f32, radius: f32, color: Color)

Fill a circle.

Source

fn stroke_circle( &mut self, cx: f32, cy: f32, radius: f32, color: Color, width: f32, )

Stroke a circle outline.

Source

fn stroke_arc( &mut self, cx: f32, cy: f32, radius: f32, start_angle: f32, end_angle: f32, color: Color, width: f32, )

Stroke an arc (portion of a circle).

Source

fn draw_line( &mut self, x1: f32, y1: f32, x2: f32, y2: f32, color: Color, width: f32, )

Draw a line between two points.

Source

fn draw_text(&mut self, text: &str, x: f32, y: f32, size: f32, color: Color)

Draw text using the embedded TrueType font (fontdue).

Source

fn text_width(&self, text: &str, size: f32) -> f32

Measure the width of a text string in pixels.

Provided Methods§

Source

fn present(&mut self)

Flush rendering to the display surface.

No-op for CPU backends (pixels are read directly from the buffer). GPU backends submit their command buffer and present here.

Implementors§