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fix: Removed assumption of annotation SVG's existence [DC-498] #50

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Merged
Jarbuckle merged 4 commits into from
Jan 31, 2025
Merged

fix: Removed assumption of annotation SVG's existence [DC-498] #50

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f249c31
Removed the assumption that annotation SVG exists
Jarbuckle Jan 30, 2025
fa5fc8a
Reworked the compose/render function
Jarbuckle Jan 31, 2025
2f0d52f
Merge branch 'main' into joel/dc-498-dzi-viewer-annotation-issue
Jarbuckle Jan 31, 2025
23edce7
Fix prettier issues
Jarbuckle Jan 31, 2025
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54 changes: 22 additions & 32 deletions examples/src/dzi/dzi-viewer.tsx
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import { useContext, useEffect, useRef } from 'react';
import { useContext, useEffect, useRef, useState } from 'react';
import {
buildDziRenderer,
type DziImage,
type DziRenderSettings,
type DziTile,
Expand All @@ -22,22 +23,6 @@ type Props = {
onMouseLeave?: (e: React.MouseEvent<HTMLCanvasElement>) => void;
} & DziRenderSettings;

function buildCompositor(svg: HTMLImageElement, settings: DziRenderSettings) {
return (ctx: CanvasRenderingContext2D, image: ImageData) => {
const { width, height } = svg;
const { camera } = settings;
const svgSize: vec2 = [width, height];
const start = Vec2.mul(camera.view.minCorner, svgSize);
const wh = Vec2.sub(Vec2.mul(camera.view.maxCorner, svgSize), start);
const [sx, sy] = start;
const [sw, sh] = wh;
// first, draw the results from webGL
ctx.putImageData(image, 0, 0);
// then add our svg overlay
ctx.drawImage(svg, sx, sy, sw, sh, 0, 0, ctx.canvas.width, ctx.canvas.height);
};
}

export function DziViewer(props: Props) {
const { svgOverlay, camera, dzi, onWheel, id, onMouseDown, onMouseUp, onMouseMove, onMouseLeave } = props;
const server = useContext(renderServerContext);
Expand All @@ -62,6 +47,22 @@ export function DziViewer(props: Props) {
}, [server]);

useEffect(() => {
const compose = (ctx: CanvasRenderingContext2D, image: ImageData) => {
// first, draw the results from webGL
ctx.putImageData(image, 0, 0);

if (svgOverlay) {
// then add our svg overlay
const { width, height } = svgOverlay;
const svgSize: vec2 = [width, height];
const start = Vec2.mul(camera.view.minCorner, svgSize);
const wh = Vec2.sub(Vec2.mul(camera.view.maxCorner, svgSize), start);
const [sx, sy] = start;
const [sw, sh] = wh;
ctx.drawImage(svgOverlay, sx, sy, sw, sh, 0, 0, ctx.canvas.width, ctx.canvas.height);
}
};

if (server && renderer.current && cnvs.current) {
const renderMyData: RenderFrameFn<DziImage, DziTile> = (target, cache, callback) => {
if (renderer.current) {
Expand All @@ -70,24 +71,13 @@ export function DziViewer(props: Props) {
}
return null;
};
const compose = buildCompositor(svgOverlay, { camera });
server.beginRendering(
renderMyData,
(e) => {
switch (e.status) {
case 'begin':
server.regl?.clear({ framebuffer: e.target, color: [0, 0, 0, 0], depth: 1 });
break;
case 'progress':
// wanna see the tiles as they arrive?
e.server.copyToClient(compose);
break;
case 'finished': {
e.server.copyToClient(compose);
break;
}
default:
break;
if (e.status == 'begin') {
server.regl?.clear({ framebuffer: e.target, color: [0, 0, 0, 0], depth: 1 });
} else if (e.status == 'progress' || e.status == 'finished') {
e.server.copyToClient(compose);
}
},
cnvs.current
Expand Down