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Make WebP decoder use memory views (#145)

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* Make WebP decoder use memory views

* Update webp_dec README

* Port quantizer to memory views as well
This commit is contained in:
Surma
2018-08-21 13:29:53 +01:00
committed by Jake Archibald
parent 8006a1a5e7
commit e3b1b08424
18 changed files with 194 additions and 276 deletions
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25
codecs/imagequant/example.html
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@@ -23,29 +23,14 @@
}
Module.onRuntimeInitialized = async _ => {
const api = {
version: Module.cwrap('version', 'number', []),
create_buffer: Module.cwrap('create_buffer', 'number', ['number', 'number']),
destroy_buffer: Module.cwrap('destroy_buffer', '', ['number']),
quantize: Module.cwrap('quantize', '', ['number', 'number', 'number', 'number', 'number']),
zx_quantize: Module.cwrap('zx_quantize', '', ['number', 'number', 'number', 'number']),
free_result: Module.cwrap('free_result', '', ['number']),
get_result_pointer: Module.cwrap('get_result_pointer', 'number', []),
};
console.log('Version:', api.version().toString(16));
console.log('Version:', Module.version().toString(16));
const image = await loadImage('../example.png');
const p = api.create_buffer(image.width, image.height);
Module.HEAP8.set(image.data, p);
//api.quantize(p, image.width, image.height, 256, 1.0);
api.zx_quantize(p, image.width, image.height, 1);
// const rawImage = Module.quantize(image.data, image.width, image.height, 256, 1.0);
const rawImage = Module.zx_quantize(image.data, image.width, image.height, 1.0);
console.log('done');
const resultPointer = api.get_result_pointer();
const resultView = new Uint8Array(Module.HEAP8.buffer, resultPointer, image.width * image.height * 4);
const result = new Uint8ClampedArray(resultView);
api.free_result();
api.destroy_buffer(p);
Module.free_result();
const imageData = new ImageData(result, image.width, image.height);
const imageData = new ImageData(new Uint8ClampedArray(rawImage.buffer), rawImage.width, rawImage.height);
const canvas = document.createElement('canvas');
canvas.width = image.width;
canvas.height = image.height;