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import { PointStyle } from '../index.esm';
import { Color } from '../color';
import { ChartArea, RoundedRect } from '../geometric';
import { CanvasFontSpec } from './helpers.options';
export function clearCanvas(canvas: HTMLCanvasElement, ctx?: CanvasRenderingContext2D): void;
export function clipArea(ctx: CanvasRenderingContext2D, area: ChartArea): void;
export function unclipArea(ctx: CanvasRenderingContext2D): void;
export interface DrawPointOptions {
pointStyle: PointStyle;
rotation?: number;
radius: number;
borderWidth: number;
}
export function drawPoint(ctx: CanvasRenderingContext2D, options: DrawPointOptions, x: number, y: number): void;
export function drawPointLegend(ctx: CanvasRenderingContext2D, options: DrawPointOptions, x: number, y: number, w: number): void;
/**
* Converts the given font object into a CSS font string.
* @param font a font object
* @return The CSS font string. See https://developer.mozilla.org/en-US/docs/Web/CSS/font
*/
export function toFontString(font: { size: number; family: string; style?: string; weight?: string }): string | null;
export interface RenderTextOpts {
/**
* The fill color of the text. If unset, the existing
* fillStyle property of the canvas is unchanged.
*/
color?: Color;
/**
* The width of the strikethrough / underline
* @default 2
*/
decorationWidth?: number;
/**
* The max width of the text in pixels
*/
maxWidth?: number;
/**
* A rotation to be applied to the canvas
* This is applied after the translation is applied
*/
rotation?: number;
/**
* Apply a strikethrough effect to the text
*/
strikethrough?: boolean;
/**
* The color of the text stroke. If unset, the existing
* strokeStyle property of the context is unchanged
*/
strokeColor?: Color;
/**
* The text stroke width. If unset, the existing
* lineWidth property of the context is unchanged
*/
strokeWidth?: number;
/**
* The text alignment to use. If unset, the existing
* textAlign property of the context is unchanged
*/
textAlign: CanvasTextAlign;
/**
* The text baseline to use. If unset, the existing
* textBaseline property of the context is unchanged
*/
textBaseline: CanvasTextBaseline;
/**
* If specified, a translation to apply to the context
*/
translation?: [number, number];
/**
* Underline the text
*/
underline?: boolean;
}
export function renderText(
ctx: CanvasRenderingContext2D,
text: string | string[],
x: number,
y: number,
font: CanvasFontSpec,
opts?: RenderTextOpts
): void;
export function addRoundedRectPath(ctx: CanvasRenderingContext2D, rect: RoundedRect): void;