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Expose libvips gaussnoise operation (#2527)

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alza54
2021-01-16 15:03:25 +01:00
committed by GitHub
parent 419cbe50f6
commit c9f85fe27f
6 changed files with 343 additions and 21 deletions
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48
lib/input.js
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@@ -137,22 +137,50 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
is.object(inputOptions.create) &&
is.integer(inputOptions.create.width) && inputOptions.create.width > 0 &&
is.integer(inputOptions.create.height) && inputOptions.create.height > 0 &&
is.integer(inputOptions.create.channels) && is.inRange(inputOptions.create.channels, 3, 4) &&
is.defined(inputOptions.create.background)
is.integer(inputOptions.create.channels)
) {
inputDescriptor.createWidth = inputOptions.create.width;
inputDescriptor.createHeight = inputOptions.create.height;
inputDescriptor.createChannels = inputOptions.create.channels;
const background = color(inputOptions.create.background);
inputDescriptor.createBackground = [
background.red(),
background.green(),
background.blue(),
Math.round(background.alpha() * 255)
];
// Noise
if (is.defined(inputOptions.create.noise)) {
if (!is.object(inputOptions.create.noise)) {
throw new Error('Expected noise to be an object');
}
if (!is.inArray(inputOptions.create.noise.type, ['gaussian'])) {
throw new Error('Only gaussian noise is supported at the moment');
}
if (!is.inRange(inputOptions.create.channels, 1, 4)) {
throw is.invalidParameterError('create.channels', 'number between 1 and 4', inputOptions.create.channels);
}
inputDescriptor.createNoiseType = inputOptions.create.noise.type;
if (is.number(inputOptions.create.noise.mean) && is.inRange(inputOptions.create.noise.mean, 0, 10000)) {
inputDescriptor.createNoiseMean = inputOptions.create.noise.mean;
} else {
throw is.invalidParameterError('create.noise.mean', 'number between 0 and 10000', inputOptions.create.noise.mean);
}
if (is.number(inputOptions.create.noise.sigma) && is.inRange(inputOptions.create.noise.sigma, 0, 10000)) {
inputDescriptor.createNoiseSigma = inputOptions.create.noise.sigma;
} else {
throw is.invalidParameterError('create.noise.sigma', 'number between 0 and 10000', inputOptions.create.noise.sigma);
}
} else if (is.defined(inputOptions.create.background)) {
if (!is.inRange(inputOptions.create.channels, 3, 4)) {
throw is.invalidParameterError('create.channels', 'number between 3 and 4', inputOptions.create.channels);
}
const background = color(inputOptions.create.background);
inputDescriptor.createBackground = [
background.red(),
background.green(),
background.blue(),
Math.round(background.alpha() * 255)
];
} else {
throw new Error('Expected valid noise or background to create a new input image');
}
delete inputDescriptor.buffer;
} else {
throw new Error('Expected valid width, height, channels and background to create a new input image');
throw new Error('Expected valid width, height and channels to create a new input image');
}
}
} else if (is.defined(inputOptions)) {