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Reenable rotate

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This commit is contained in:
Surma
2020-12-05 20:50:09 +00:00
parent 89508c9385
commit 4e5bb64565
1 changed files with 32 additions and 29 deletions
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61
cli/src/codecs.js
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@ -154,35 +154,38 @@ export const preprocessors = {
dither: 1.0,
},
},
// rotate: {
// name: "Rotate",
// description: "Rotate image",
// instantiate: async () => {
// return async (buffer, width, height, { degrees }) => {
// const sameDimensions = degrees == 0 || degrees == 180;
// const size = width * height * 4;
// const { instance } = await WebAssembly.instantiate(
// await fsp.readFile(pathify(rotateWasm))
// );
// const { memory } = instance.exports;
// const pagesNeeded = Math.ceil(
// (size * 2 - memory.buffer.byteLength) / (64 * 1024)
// );
// memory.grow(pagesNeeded);
// const view = new Uint8ClampedArray(memory.buffer);
// view.set(buffer, 8);
// instance.exports.rotate(width, height, degrees);
// return new ImageData(
// new Uint8ClampedArray(view.slice(size + 8, size * 2 + 8)),
// sameDimensions ? width : height,
// sameDimensions ? height : width
// );
// };
// },
// defaultOptions: {
// numRotations: 0
// }
// }
rotate: {
name: 'Rotate',
description: 'Rotate image',
instantiate: async () => {
return async (buffer, width, height, { numRotations }) => {
const degrees = (numRotations * 90) % 360;
const sameDimensions = degrees == 0 || degrees == 180;
const size = width * height * 4;
const { instance } = await WebAssembly.instantiate(
await fsp.readFile(pathify(rotateWasm)),
);
const { memory } = instance.exports;
const additionalPagesNeeded = Math.ceil(
(size * 2 - memory.buffer.byteLength + 8) / (64 * 1024),
);
if (additionalPagesNeeded > 0) {
memory.grow(additionalPagesNeeded);
}
const view = new Uint8ClampedArray(memory.buffer);
view.set(buffer, 8);
instance.exports.rotate(width, height, degrees);
return new ImageData(
new Uint8ClampedArray(view.slice(size + 8, size * 2 + 8)),
sameDimensions ? width : height,
sameDimensions ? height : width,
);
};
},
defaultOptions: {
numRotations: 0,
},
},
};
export const codecs = {