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Creating fallbacks for all ImageBitmap usage & refactoring. (#175)

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Fixes #173
This commit is contained in:
Jake Archibald
2018-09-27 14:44:54 +01:00
committed by GitHub
parent 1b630a092f
commit c9fe5ffbcf
11 changed files with 2085 additions and 2197 deletions
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10
src/codecs/decoders.ts
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@@ -1,11 +1,11 @@
import * as wasmWebp from './webp/decoder';
import * as browserWebp from './webp/decoder';
import { createImageBitmapPolyfill, sniffMimeType } from '../lib/util';
import { nativeDecode, sniffMimeType } from '../lib/util';
export interface Decoder {
name: string;
decode(blob: Blob): Promise<ImageBitmap>;
decode(blob: Blob): Promise<ImageData>;
isSupported(): Promise<boolean>;
canHandleMimeType(mimeType: string): boolean;
}
@@ -31,12 +31,12 @@ async function findDecodersByMimeType(mimeType: string): Promise<Decoder[]> {
return decoders.filter(decoder => decoder.canHandleMimeType(mimeType));
}
export async function decodeImage(blob: Blob): Promise<ImageBitmap> {
export async function decodeImage(blob: Blob): Promise<ImageData> {
const mimeType = await sniffMimeType(blob);
const decoders = await findDecodersByMimeType(mimeType);
if (decoders.length <= 0) {
// If we can’t find a decoder, hailmary with createImageBitmap
return createImageBitmapPolyfill(blob);
// If we can’t find a decoder, hailmary with the browser's decoders
return nativeDecode(blob);
}
for (const decoder of decoders) {
try {