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Fix a number of Typescript issues (#31877)

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Typescript error count is reduced from 633 to 540 with this. No runtime
changes except in test code.
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silverwind 2024-08-28 18:32:38 +02:00 • committed by GitHub
parent 39d2fdefaf
commit 7207d93f01
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16 changed files with 141 additions and 79 deletions
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16
web_src/js/utils/image.ts
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@ -1,6 +1,11 @@
export async function pngChunks(blob) {
type PngChunk = {
name: string,
data: Uint8Array,
}
export async function pngChunks(blob: Blob): Promise<PngChunk[]> {
const uint8arr = new Uint8Array(await blob.arrayBuffer());
const chunks = [];
const chunks: PngChunk[] = [];
if (uint8arr.length < 12) return chunks;
const view = new DataView(uint8arr.buffer);
if (view.getBigUint64(0) !== 9894494448401390090n) return chunks;
@ -19,9 +24,14 @@ export async function pngChunks(blob) {
return chunks;
}
type ImageInfo = {
width?: number,
dppx?: number,
}
// decode a image and try to obtain width and dppx. It will never throw but instead
// return default values.
export async function imageInfo(blob) {
export async function imageInfo(blob: Blob): Promise<ImageInfo> {
let width = 0, dppx = 1; // dppx: 1 dot per pixel for non-HiDPI screens
if (blob.type === 'image/png') { // only png is supported currently