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Implement sRGB color conversion (#510)

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* Add sRGB -> RGB conversion before resize

* Add clamping for color space conversions

* Clip for demultiplication as well

* Fixing linear <-> srgb conversion

* Update benchmark

* Decouple srgb calculations

* Generate lookup tables

* Update src/codecs/resize/options.tsx

* Defaulting on, renaming, removing redundant state
This commit is contained in:
Surma
2019-03-12 14:09:35 +00:00
committed by Jake Archibald
parent 496896e36e
commit bf4d4b78cb
13 changed files with 157 additions and 36 deletions
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48
codecs/resize/benchmark.js
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@@ -4,7 +4,7 @@
// [1]: https://github.com/GoogleChromeLabs/jsvu
self = global = this;
load('./pkg/resize.js');
load("./pkg/resize.js");
async function init() {
// Adjustable constants.
@@ -19,23 +19,35 @@ async function init() {
const module = await WebAssembly.compile(readbuffer("./pkg/resize_bg.wasm"));
await wasm_bindgen(module);
[false, true].forEach(premulti => {
print(`\npremultiplication: ${premulti}`);
print(`==============================`);
for (let i = 0; i < 100; i++) {
const start = Date.now();
wasm_bindgen.resize(imageBuffer, inputDimensions, inputDimensions, outputDimensions, outputDimensions, algorithm, premulti);
iterations[i] = Date.now() - start;
[[false, false], [true, false], [false, true], [true, true]].forEach(
opts => {
print(`\npremultiplication: ${opts[0]}`);
print(`color space conversion: ${opts[1]}`);
print(`==============================`);
for (let i = 0; i < 100; i++) {
const start = Date.now();
wasm_bindgen.resize(
imageBuffer,
inputDimensions,
inputDimensions,
outputDimensions,
outputDimensions,
algorithm,
...opts
);
iterations[i] = Date.now() - start;
}
const average =
iterations.reduce((sum, c) => sum + c) / iterations.length;
const stddev = Math.sqrt(
iterations
.map(i => Math.pow(i - average, 2))
.reduce((sum, c) => sum + c) / iterations.length
);
print(`n = ${iterations.length}`);
print(`Average: ${average}`);
print(`StdDev: ${stddev}`);
}
const average = iterations.reduce((sum, c) => sum + c) / iterations.length;
const stddev = Math.sqrt(
iterations
.map(i => Math.pow(i - average, 2))
.reduce((sum, c) => sum + c) / iterations.length
);
print(`n = ${iterations.length}`);
print(`Average: ${average}`);
print(`StdDev: ${stddev}`);
});
);
}
init().catch(e => console.error(e, e.stack));