Mirrors/webamp
1
0
Fork 0
mirror of https://github.com/captbaritone/webamp.git synced 2026-08-04 07:55:28 +00:00
Code Issues Projects Releases Wiki Activity

Use createImageBitmap if possible

Browse source
This commit is contained in:
Jordan Eldredge 2017-10-12 14:16:02 -07:00
parent 01e3dd1d28
commit a104e35b36
1 changed files with 28 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

33
js/skinParser.js
View file

@ -35,15 +35,35 @@ const CURSORS = [
"WSWINBUT"
];
const genImgFromBlob = blob =>
new Promise(resolve => {
const _genImgFromBlob = async blob =>
new Promise((resolve, reject) => {
const img = new Image();
img.onload = () => {
// Schedule cleanup of object url?
// Maybe on next tick, or with requestidlecallback
resolve(img);
};
img.onerror = () => reject("Failed to decode image");
img.src = URL.createObjectURL(blob);
});
const genImgFromBlob = async blob => {
if (window.createImageBitmap) {
try {
// Use this faster native browser API if avaliable.
return await window.createImageBitmap(blob);
} catch (e) {
console.warn(
"Encountered an error with createImageBitmap. Falling back to Image approach."
);
// There are some bugs in the new API. In case something goes wrong, we call fall back.
return _genImgFromBlob(blob);
}
}
console.log("not even trying");
return _genImgFromBlob(blob);
};
// "Promisify" processBuffer
const genBufferFromFile = file =>
new Promise(resolve => {
@ -79,9 +99,12 @@ async function genSpriteUrisFromFilename(zip, fileName) {
if (!blob) {
return {};
}
const img = await genImgFromBlob(blob);
const spriteUris = getSpriteUrisFromImg(img, SKIN_SPRITES[fileName]);
return spriteUris;
// The spec for createImageBitmap() says the browser should try to sniff the
// mime type, but it looks like Firefox does not. So we specify it here
// explicitly.
const typedBlob = new Blob([blob], { type: "image/bmp" });
const img = await genImgFromBlob(typedBlob);
return getSpriteUrisFromImg(img, SKIN_SPRITES[fileName]);
}
async function getCursorFromFilename(zip, fileName) {