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Avoid triggering reflow on canvasSize querying

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schmelczerandras 2020-10-25 15:56:20 +01:00
parent 582a0cea08
commit 3fb6cc0411
9 changed files with 116 additions and 76 deletions
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16
src/graphics/rendering/renderer/renderer.ts
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@ -1,4 +1,4 @@
import { vec2 } from 'gl-matrix';
import { ReadonlyVec2, vec2 } from 'gl-matrix';
import { Drawable } from '../../../drawables/drawable';
import { RuntimeSettings } from '../settings/runtime-settings';
import { RendererInfo } from './renderer-info';
@ -10,16 +10,18 @@ import { RendererInfo } from './renderer-info';
*/
export interface Renderer {
/**
* Get the actual resolution of the canvas.
* Get the actual resolution of the canvas without triggering a reflow.
*
* A ResizeObserver is utilised fot achieving this.
*/
readonly canvasSize: vec2;
readonly canvasSize: ReadonlyVec2;
/**
* Get the viewArea size set by the last `setViewArea`.
*
* By default, `canvasSize` is used for the view area size.
*/
readonly viewAreaSize: vec2;
readonly viewAreaSize: ReadonlyVec2;
/**
* Set the camera transformation.
@ -28,7 +30,7 @@ export interface Renderer {
* @param size need not be equal to the canvas size, though their aspect ratio
* should be the same to avoid stretching.
*/
setViewArea(topLeft: vec2, size: vec2): void;
setViewArea(topLeft: ReadonlyVec2, size: ReadonlyVec2): void;
/**
* The inverse of `worldToDisplayCoordinates`, returns the world coordinates
@ -41,7 +43,7 @@ export interface Renderer {
* @param displayCoordinates The origin is in the display's top left corner.
* Just as in mouse events' clientX and clientY.
*/
displayToWorldCoordinates(displayCoordinates: vec2): vec2;
displayToWorldCoordinates(displayCoordinates: ReadonlyVec2): vec2;
/**
* The inverse of `displayToWorldCoordinates`, returns the screen space position
@ -52,7 +54,7 @@ export interface Renderer {
*
* @param worldCoordinates Coordinates used when drawing objects.
*/
worldToDisplayCoordinates(worldCoordinates: vec2): vec2;
worldToDisplayCoordinates(worldCoordinates: ReadonlyVec2): vec2;
/**
* Patch the current runtime settings with new values.