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Add support for bit depth with raw input and output (#2762)

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* Determine input raw pixel depth from the given typed array
* Allow pixel depth to be set on raw output
This commit is contained in:
Mart
2021-08-03 15:52:54 +02:00
committed by GitHub
parent eabb671b10
commit b7add480c7
9 changed files with 123 additions and 16 deletions
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34
lib/input.js
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@@ -34,8 +34,7 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
throw Error('Input Buffer is empty');
}
inputDescriptor.buffer = input;
} else if (is.uint8Array(input)) {
// Uint8Array or Uint8ClampedArray
} else if (is.typedArray(input)) {
if (input.length === 0) {
throw Error('Input Bit Array is empty');
}
@@ -104,6 +103,37 @@ function _createInputDescriptor (input, inputOptions, containerOptions) {
inputDescriptor.rawHeight = inputOptions.raw.height;
inputDescriptor.rawChannels = inputOptions.raw.channels;
inputDescriptor.rawPremultiplied = !!inputOptions.raw.premultiplied;
switch (input.constructor) {
case Uint8Array:
case Uint8ClampedArray:
inputDescriptor.rawDepth = 'uchar';
break;
case Int8Array:
inputDescriptor.rawDepth = 'char';
break;
case Uint16Array:
inputDescriptor.rawDepth = 'ushort';
break;
case Int16Array:
inputDescriptor.rawDepth = 'short';
break;
case Uint32Array:
inputDescriptor.rawDepth = 'uint';
break;
case Int32Array:
inputDescriptor.rawDepth = 'int';
break;
case Float32Array:
inputDescriptor.rawDepth = 'float';
break;
case Float64Array:
inputDescriptor.rawDepth = 'double';
break;
default:
inputDescriptor.rawDepth = 'uchar';
break;
}
} else {
throw new Error('Expected width, height and channels for raw pixel input');
}