mirror of
https://github.com/swc-project/swc.git
synced 2024-12-29 16:42:28 +03:00
452 lines
19 KiB
TypeScript
452 lines
19 KiB
TypeScript
// Loaded from https://deno.land/x/deno_image@v0.0.3/lib/resize/resize.js
|
|
|
|
|
|
//JavaScript Image Resizer (c) 2012 - Grant Galitz
|
|
|
|
export class Resize {
|
|
constructor(widthOriginal, heightOriginal, targetWidth, targetHeight, blendAlpha, interpolationPass, useWebWorker, resizeCallback) {
|
|
this.widthOriginal = Math.abs(parseInt(widthOriginal) || 0);
|
|
this.heightOriginal = Math.abs(parseInt(heightOriginal) || 0);
|
|
this.targetWidth = Math.abs(parseInt(targetWidth) || 0);
|
|
this.targetHeight = Math.abs(parseInt(targetHeight) || 0);
|
|
this.colorChannels = (!!blendAlpha) ? 4 : 3;
|
|
this.interpolationPass = !!interpolationPass;
|
|
this.useWebWorker = !!useWebWorker;
|
|
this.resizeCallback = (typeof resizeCallback == "function") ? resizeCallback : function (returnedArray) { };
|
|
this.targetWidthMultipliedByChannels = this.targetWidth * this.colorChannels;
|
|
this.originalWidthMultipliedByChannels = this.widthOriginal * this.colorChannels;
|
|
this.originalHeightMultipliedByChannels = this.heightOriginal * this.colorChannels;
|
|
this.widthPassResultSize = this.targetWidthMultipliedByChannels * this.heightOriginal;
|
|
this.finalResultSize = this.targetWidthMultipliedByChannels * this.targetHeight;
|
|
this.initialize();
|
|
}
|
|
initialize() {
|
|
//Perform some checks:
|
|
if (this.widthOriginal > 0 && this.heightOriginal > 0 && this.targetWidth > 0 && this.targetHeight > 0) {
|
|
if (this.useWebWorker) {
|
|
this.useWebWorker = (this.widthOriginal != this.targetWidth || this.heightOriginal != this.targetHeight);
|
|
if (this.useWebWorker) {
|
|
this.configureWorker();
|
|
}
|
|
}
|
|
if (!this.useWebWorker) {
|
|
this.configurePasses();
|
|
}
|
|
}
|
|
else {
|
|
throw (new Error("Invalid settings specified for the resizer."));
|
|
}
|
|
}
|
|
configureWorker() {
|
|
try {
|
|
var parentObj = this;
|
|
this.worker = new Worker('./resizeWorker.js');
|
|
this.worker.onmessage = function (event) {
|
|
parentObj.heightBuffer = event.data;
|
|
parentObj.resizeCallback(parentObj.heightBuffer);
|
|
};
|
|
this.worker.postMessage(["setup", this.widthOriginal, this.heightOriginal, this.targetWidth, this.targetHeight, this.colorChannels, this.interpolationPass]);
|
|
}
|
|
catch (error) {
|
|
this.useWebWorker = false;
|
|
}
|
|
}
|
|
configurePasses() {
|
|
if (this.widthOriginal == this.targetWidth) {
|
|
//Bypass the width resizer pass:
|
|
this.resizeWidth = this.bypassResizer;
|
|
}
|
|
else {
|
|
//Setup the width resizer pass:
|
|
this.ratioWeightWidthPass = this.widthOriginal / this.targetWidth;
|
|
if (this.ratioWeightWidthPass < 1 && this.interpolationPass) {
|
|
this.initializeFirstPassBuffers(true);
|
|
this.resizeWidth = (this.colorChannels == 4) ? this.resizeWidthInterpolatedRGBA : this.resizeWidthInterpolatedRGB;
|
|
}
|
|
else {
|
|
this.initializeFirstPassBuffers(false);
|
|
this.resizeWidth = (this.colorChannels == 4) ? this.resizeWidthRGBA : this.resizeWidthRGB;
|
|
}
|
|
}
|
|
if (this.heightOriginal == this.targetHeight) {
|
|
//Bypass the height resizer pass:
|
|
this.resizeHeight = this.bypassResizer;
|
|
}
|
|
else {
|
|
//Setup the height resizer pass:
|
|
this.ratioWeightHeightPass = this.heightOriginal / this.targetHeight;
|
|
if (this.ratioWeightHeightPass < 1 && this.interpolationPass) {
|
|
this.initializeSecondPassBuffers(true);
|
|
this.resizeHeight = this.resizeHeightInterpolated;
|
|
}
|
|
else {
|
|
this.initializeSecondPassBuffers(false);
|
|
this.resizeHeight = (this.colorChannels == 4) ? this.resizeHeightRGBA : this.resizeHeightRGB;
|
|
}
|
|
}
|
|
}
|
|
resizeWidthRGB(buffer) {
|
|
var ratioWeight = this.ratioWeightWidthPass;
|
|
var ratioWeightDivisor = 1 / ratioWeight;
|
|
var weight = 0;
|
|
var amountToNext = 0;
|
|
var actualPosition = 0;
|
|
var currentPosition = 0;
|
|
var line = 0;
|
|
var pixelOffset = 0;
|
|
var outputOffset = 0;
|
|
var nextLineOffsetOriginalWidth = this.originalWidthMultipliedByChannels - 2;
|
|
var nextLineOffsetTargetWidth = this.targetWidthMultipliedByChannels - 2;
|
|
var output = this.outputWidthWorkBench;
|
|
var outputBuffer = this.widthBuffer;
|
|
do {
|
|
for (line = 0; line < this.originalHeightMultipliedByChannels;) {
|
|
output[line++] = 0;
|
|
output[line++] = 0;
|
|
output[line++] = 0;
|
|
}
|
|
weight = ratioWeight;
|
|
do {
|
|
amountToNext = 1 + actualPosition - currentPosition;
|
|
if (weight >= amountToNext) {
|
|
for (line = 0, pixelOffset = actualPosition; line < this.originalHeightMultipliedByChannels; pixelOffset += nextLineOffsetOriginalWidth) {
|
|
output[line++] += buffer[pixelOffset++] * amountToNext;
|
|
output[line++] += buffer[pixelOffset++] * amountToNext;
|
|
output[line++] += buffer[pixelOffset] * amountToNext;
|
|
}
|
|
currentPosition = actualPosition = actualPosition + 3;
|
|
weight -= amountToNext;
|
|
}
|
|
else {
|
|
for (line = 0, pixelOffset = actualPosition; line < this.originalHeightMultipliedByChannels; pixelOffset += nextLineOffsetOriginalWidth) {
|
|
output[line++] += buffer[pixelOffset++] * weight;
|
|
output[line++] += buffer[pixelOffset++] * weight;
|
|
output[line++] += buffer[pixelOffset] * weight;
|
|
}
|
|
currentPosition += weight;
|
|
break;
|
|
}
|
|
} while (weight > 0 && actualPosition < this.originalWidthMultipliedByChannels);
|
|
for (line = 0, pixelOffset = outputOffset; line < this.originalHeightMultipliedByChannels; pixelOffset += nextLineOffsetTargetWidth) {
|
|
outputBuffer[pixelOffset++] = output[line++] * ratioWeightDivisor;
|
|
outputBuffer[pixelOffset++] = output[line++] * ratioWeightDivisor;
|
|
outputBuffer[pixelOffset] = output[line++] * ratioWeightDivisor;
|
|
}
|
|
outputOffset += 3;
|
|
} while (outputOffset < this.targetWidthMultipliedByChannels);
|
|
return outputBuffer;
|
|
}
|
|
resizeWidthInterpolatedRGB(buffer) {
|
|
var ratioWeight = this.ratioWeightWidthPass;
|
|
var weight = 0;
|
|
var finalOffset = 0;
|
|
var pixelOffset = 0;
|
|
var firstWeight = 0;
|
|
var secondWeight = 0;
|
|
var outputBuffer = this.widthBuffer;
|
|
//Handle for only one interpolation input being valid for start calculation:
|
|
for (var targetPosition = 0; weight < 0.25; targetPosition += 3, weight += ratioWeight) {
|
|
for (finalOffset = targetPosition, pixelOffset = 0; finalOffset < this.widthPassResultSize; pixelOffset += this.originalWidthMultipliedByChannels, finalOffset += this.targetWidthMultipliedByChannels) {
|
|
outputBuffer[finalOffset] = buffer[pixelOffset];
|
|
outputBuffer[finalOffset + 1] = buffer[pixelOffset + 1];
|
|
outputBuffer[finalOffset + 2] = buffer[pixelOffset + 2];
|
|
}
|
|
}
|
|
weight -= 0.25;
|
|
for (var interpolationWidthSourceReadStop = this.widthOriginal - 1; weight < interpolationWidthSourceReadStop; targetPosition += 3, weight += ratioWeight) {
|
|
//Calculate weightings:
|
|
secondWeight = weight % 1;
|
|
firstWeight = 1 - secondWeight;
|
|
//Interpolate:
|
|
for (finalOffset = targetPosition, pixelOffset = Math.floor(weight) * 3; finalOffset < this.widthPassResultSize; pixelOffset += this.originalWidthMultipliedByChannels, finalOffset += this.targetWidthMultipliedByChannels) {
|
|
outputBuffer[finalOffset] = (buffer[pixelOffset] * firstWeight) + (buffer[pixelOffset + 3] * secondWeight);
|
|
outputBuffer[finalOffset + 1] = (buffer[pixelOffset + 1] * firstWeight) + (buffer[pixelOffset + 4] * secondWeight);
|
|
outputBuffer[finalOffset + 2] = (buffer[pixelOffset + 2] * firstWeight) + (buffer[pixelOffset + 5] * secondWeight);
|
|
}
|
|
}
|
|
//Handle for only one interpolation input being valid for end calculation:
|
|
for (interpolationWidthSourceReadStop = this.originalWidthMultipliedByChannels - 3; targetPosition < this.targetWidthMultipliedByChannels; targetPosition += 3) {
|
|
for (finalOffset = targetPosition, pixelOffset = interpolationWidthSourceReadStop; finalOffset < this.widthPassResultSize; pixelOffset += this.originalWidthMultipliedByChannels, finalOffset += this.targetWidthMultipliedByChannels) {
|
|
outputBuffer[finalOffset] = buffer[pixelOffset];
|
|
outputBuffer[finalOffset + 1] = buffer[pixelOffset + 1];
|
|
outputBuffer[finalOffset + 2] = buffer[pixelOffset + 2];
|
|
}
|
|
}
|
|
return outputBuffer;
|
|
}
|
|
resizeWidthRGBA(buffer) {
|
|
var ratioWeight = this.ratioWeightWidthPass;
|
|
var ratioWeightDivisor = 1 / ratioWeight;
|
|
var weight = 0;
|
|
var amountToNext = 0;
|
|
var actualPosition = 0;
|
|
var currentPosition = 0;
|
|
var line = 0;
|
|
var pixelOffset = 0;
|
|
var outputOffset = 0;
|
|
var nextLineOffsetOriginalWidth = this.originalWidthMultipliedByChannels - 3;
|
|
var nextLineOffsetTargetWidth = this.targetWidthMultipliedByChannels - 3;
|
|
var output = this.outputWidthWorkBench;
|
|
var outputBuffer = this.widthBuffer;
|
|
do {
|
|
for (line = 0; line < this.originalHeightMultipliedByChannels;) {
|
|
output[line++] = 0;
|
|
output[line++] = 0;
|
|
output[line++] = 0;
|
|
output[line++] = 0;
|
|
}
|
|
weight = ratioWeight;
|
|
do {
|
|
amountToNext = 1 + actualPosition - currentPosition;
|
|
if (weight >= amountToNext) {
|
|
for (line = 0, pixelOffset = actualPosition; line < this.originalHeightMultipliedByChannels; pixelOffset += nextLineOffsetOriginalWidth) {
|
|
output[line++] += buffer[pixelOffset++] * amountToNext;
|
|
output[line++] += buffer[pixelOffset++] * amountToNext;
|
|
output[line++] += buffer[pixelOffset++] * amountToNext;
|
|
output[line++] += buffer[pixelOffset] * amountToNext;
|
|
}
|
|
currentPosition = actualPosition = actualPosition + 4;
|
|
weight -= amountToNext;
|
|
}
|
|
else {
|
|
for (line = 0, pixelOffset = actualPosition; line < this.originalHeightMultipliedByChannels; pixelOffset += nextLineOffsetOriginalWidth) {
|
|
output[line++] += buffer[pixelOffset++] * weight;
|
|
output[line++] += buffer[pixelOffset++] * weight;
|
|
output[line++] += buffer[pixelOffset++] * weight;
|
|
output[line++] += buffer[pixelOffset] * weight;
|
|
}
|
|
currentPosition += weight;
|
|
break;
|
|
}
|
|
} while (weight > 0 && actualPosition < this.originalWidthMultipliedByChannels);
|
|
for (line = 0, pixelOffset = outputOffset; line < this.originalHeightMultipliedByChannels; pixelOffset += nextLineOffsetTargetWidth) {
|
|
outputBuffer[pixelOffset++] = output[line++] * ratioWeightDivisor;
|
|
outputBuffer[pixelOffset++] = output[line++] * ratioWeightDivisor;
|
|
outputBuffer[pixelOffset++] = output[line++] * ratioWeightDivisor;
|
|
outputBuffer[pixelOffset] = output[line++] * ratioWeightDivisor;
|
|
}
|
|
outputOffset += 4;
|
|
} while (outputOffset < this.targetWidthMultipliedByChannels);
|
|
return outputBuffer;
|
|
}
|
|
resizeWidthInterpolatedRGBA(buffer) {
|
|
var ratioWeight = this.ratioWeightWidthPass;
|
|
var weight = 0;
|
|
var finalOffset = 0;
|
|
var pixelOffset = 0;
|
|
var firstWeight = 0;
|
|
var secondWeight = 0;
|
|
var outputBuffer = this.widthBuffer;
|
|
//Handle for only one interpolation input being valid for start calculation:
|
|
for (var targetPosition = 0; weight < 0.25; targetPosition += 4, weight += ratioWeight) {
|
|
for (finalOffset = targetPosition, pixelOffset = 0; finalOffset < this.widthPassResultSize; pixelOffset += this.originalWidthMultipliedByChannels, finalOffset += this.targetWidthMultipliedByChannels) {
|
|
outputBuffer[finalOffset] = buffer[pixelOffset];
|
|
outputBuffer[finalOffset + 1] = buffer[pixelOffset + 1];
|
|
outputBuffer[finalOffset + 2] = buffer[pixelOffset + 2];
|
|
outputBuffer[finalOffset + 3] = buffer[pixelOffset + 3];
|
|
}
|
|
}
|
|
weight -= 0.25;
|
|
for (var interpolationWidthSourceReadStop = this.widthOriginal - 1; weight < interpolationWidthSourceReadStop; targetPosition += 4, weight += ratioWeight) {
|
|
//Calculate weightings:
|
|
secondWeight = weight % 1;
|
|
firstWeight = 1 - secondWeight;
|
|
//Interpolate:
|
|
for (finalOffset = targetPosition, pixelOffset = Math.floor(weight) * 4; finalOffset < this.widthPassResultSize; pixelOffset += this.originalWidthMultipliedByChannels, finalOffset += this.targetWidthMultipliedByChannels) {
|
|
outputBuffer[finalOffset] = (buffer[pixelOffset] * firstWeight) + (buffer[pixelOffset + 4] * secondWeight);
|
|
outputBuffer[finalOffset + 1] = (buffer[pixelOffset + 1] * firstWeight) + (buffer[pixelOffset + 5] * secondWeight);
|
|
outputBuffer[finalOffset + 2] = (buffer[pixelOffset + 2] * firstWeight) + (buffer[pixelOffset + 6] * secondWeight);
|
|
outputBuffer[finalOffset + 3] = (buffer[pixelOffset + 3] * firstWeight) + (buffer[pixelOffset + 7] * secondWeight);
|
|
}
|
|
}
|
|
//Handle for only one interpolation input being valid for end calculation:
|
|
for (interpolationWidthSourceReadStop = this.originalWidthMultipliedByChannels - 4; targetPosition < this.targetWidthMultipliedByChannels; targetPosition += 4) {
|
|
for (finalOffset = targetPosition, pixelOffset = interpolationWidthSourceReadStop; finalOffset < this.widthPassResultSize; pixelOffset += this.originalWidthMultipliedByChannels, finalOffset += this.targetWidthMultipliedByChannels) {
|
|
outputBuffer[finalOffset] = buffer[pixelOffset];
|
|
outputBuffer[finalOffset + 1] = buffer[pixelOffset + 1];
|
|
outputBuffer[finalOffset + 2] = buffer[pixelOffset + 2];
|
|
outputBuffer[finalOffset + 3] = buffer[pixelOffset + 3];
|
|
}
|
|
}
|
|
return outputBuffer;
|
|
}
|
|
resizeHeightRGB(buffer) {
|
|
var ratioWeight = this.ratioWeightHeightPass;
|
|
var ratioWeightDivisor = 1 / ratioWeight;
|
|
var weight = 0;
|
|
var amountToNext = 0;
|
|
var actualPosition = 0;
|
|
var currentPosition = 0;
|
|
var pixelOffset = 0;
|
|
var outputOffset = 0;
|
|
var output = this.outputHeightWorkBench;
|
|
var outputBuffer = this.heightBuffer;
|
|
do {
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
output[pixelOffset++] = 0;
|
|
output[pixelOffset++] = 0;
|
|
output[pixelOffset++] = 0;
|
|
}
|
|
weight = ratioWeight;
|
|
do {
|
|
amountToNext = 1 + actualPosition - currentPosition;
|
|
if (weight >= amountToNext) {
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
output[pixelOffset++] += buffer[actualPosition++] * amountToNext;
|
|
output[pixelOffset++] += buffer[actualPosition++] * amountToNext;
|
|
output[pixelOffset++] += buffer[actualPosition++] * amountToNext;
|
|
}
|
|
currentPosition = actualPosition;
|
|
weight -= amountToNext;
|
|
}
|
|
else {
|
|
for (pixelOffset = 0, amountToNext = actualPosition; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
output[pixelOffset++] += buffer[amountToNext++] * weight;
|
|
output[pixelOffset++] += buffer[amountToNext++] * weight;
|
|
output[pixelOffset++] += buffer[amountToNext++] * weight;
|
|
}
|
|
currentPosition += weight;
|
|
break;
|
|
}
|
|
} while (weight > 0 && actualPosition < this.widthPassResultSize);
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
outputBuffer[outputOffset++] = Math.round(output[pixelOffset++] * ratioWeightDivisor);
|
|
outputBuffer[outputOffset++] = Math.round(output[pixelOffset++] * ratioWeightDivisor);
|
|
outputBuffer[outputOffset++] = Math.round(output[pixelOffset++] * ratioWeightDivisor);
|
|
}
|
|
} while (outputOffset < this.finalResultSize);
|
|
return outputBuffer;
|
|
}
|
|
resizeHeightInterpolated(buffer) {
|
|
var ratioWeight = this.ratioWeightHeightPass;
|
|
var weight = 0;
|
|
var finalOffset = 0;
|
|
var pixelOffset = 0;
|
|
var pixelOffsetAccumulated = 0;
|
|
var pixelOffsetAccumulated2 = 0;
|
|
var firstWeight = 0;
|
|
var secondWeight = 0;
|
|
var outputBuffer = this.heightBuffer;
|
|
//Handle for only one interpolation input being valid for start calculation:
|
|
for (; weight < 0.25; weight += ratioWeight) {
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
outputBuffer[finalOffset++] = buffer[pixelOffset++];
|
|
}
|
|
}
|
|
weight -= 0.25;
|
|
for (var interpolationHeightSourceReadStop = this.heightOriginal - 1; weight < interpolationHeightSourceReadStop; weight += ratioWeight) {
|
|
//Calculate weightings:
|
|
secondWeight = weight % 1;
|
|
firstWeight = 1 - secondWeight;
|
|
//Interpolate:
|
|
pixelOffsetAccumulated = Math.floor(weight) * this.targetWidthMultipliedByChannels;
|
|
pixelOffsetAccumulated2 = pixelOffsetAccumulated + this.targetWidthMultipliedByChannels;
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels; ++pixelOffset) {
|
|
outputBuffer[finalOffset++] = (buffer[pixelOffsetAccumulated + pixelOffset] * firstWeight) + (buffer[pixelOffsetAccumulated2 + pixelOffset] * secondWeight);
|
|
}
|
|
}
|
|
//Handle for only one interpolation input being valid for end calculation:
|
|
while (finalOffset < this.finalResultSize) {
|
|
for (pixelOffset = 0, pixelOffsetAccumulated = interpolationHeightSourceReadStop * this.targetWidthMultipliedByChannels; pixelOffset < this.targetWidthMultipliedByChannels; ++pixelOffset) {
|
|
outputBuffer[finalOffset++] = buffer[pixelOffsetAccumulated++];
|
|
}
|
|
}
|
|
return outputBuffer;
|
|
}
|
|
resizeHeightRGBA(buffer) {
|
|
var ratioWeight = this.ratioWeightHeightPass;
|
|
var ratioWeightDivisor = 1 / ratioWeight;
|
|
var weight = 0;
|
|
var amountToNext = 0;
|
|
var actualPosition = 0;
|
|
var currentPosition = 0;
|
|
var pixelOffset = 0;
|
|
var outputOffset = 0;
|
|
var output = this.outputHeightWorkBench;
|
|
var outputBuffer = this.heightBuffer;
|
|
do {
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
output[pixelOffset++] = 0;
|
|
output[pixelOffset++] = 0;
|
|
output[pixelOffset++] = 0;
|
|
output[pixelOffset++] = 0;
|
|
}
|
|
weight = ratioWeight;
|
|
do {
|
|
amountToNext = 1 + actualPosition - currentPosition;
|
|
if (weight >= amountToNext) {
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
output[pixelOffset++] += buffer[actualPosition++] * amountToNext;
|
|
output[pixelOffset++] += buffer[actualPosition++] * amountToNext;
|
|
output[pixelOffset++] += buffer[actualPosition++] * amountToNext;
|
|
output[pixelOffset++] += buffer[actualPosition++] * amountToNext;
|
|
}
|
|
currentPosition = actualPosition;
|
|
weight -= amountToNext;
|
|
}
|
|
else {
|
|
for (pixelOffset = 0, amountToNext = actualPosition; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
output[pixelOffset++] += buffer[amountToNext++] * weight;
|
|
output[pixelOffset++] += buffer[amountToNext++] * weight;
|
|
output[pixelOffset++] += buffer[amountToNext++] * weight;
|
|
output[pixelOffset++] += buffer[amountToNext++] * weight;
|
|
}
|
|
currentPosition += weight;
|
|
break;
|
|
}
|
|
} while (weight > 0 && actualPosition < this.widthPassResultSize);
|
|
for (pixelOffset = 0; pixelOffset < this.targetWidthMultipliedByChannels;) {
|
|
outputBuffer[outputOffset++] = Math.round(output[pixelOffset++] * ratioWeightDivisor);
|
|
outputBuffer[outputOffset++] = Math.round(output[pixelOffset++] * ratioWeightDivisor);
|
|
outputBuffer[outputOffset++] = Math.round(output[pixelOffset++] * ratioWeightDivisor);
|
|
outputBuffer[outputOffset++] = Math.round(output[pixelOffset++] * ratioWeightDivisor);
|
|
}
|
|
} while (outputOffset < this.finalResultSize);
|
|
return outputBuffer;
|
|
}
|
|
resize(buffer) {
|
|
if (this.useWebWorker) {
|
|
this.worker.postMessage(["resize", buffer]);
|
|
}
|
|
else {
|
|
this.resizeCallback(this.resizeHeight(this.resizeWidth(buffer)));
|
|
}
|
|
}
|
|
bypassResizer(buffer) {
|
|
//Just return the buffer passsed:
|
|
return buffer;
|
|
}
|
|
initializeFirstPassBuffers(BILINEARAlgo) {
|
|
//Initialize the internal width pass buffers:
|
|
this.widthBuffer = this.generateFloatBuffer(this.widthPassResultSize);
|
|
if (!BILINEARAlgo) {
|
|
this.outputWidthWorkBench = this.generateFloatBuffer(this.originalHeightMultipliedByChannels);
|
|
}
|
|
}
|
|
initializeSecondPassBuffers(BILINEARAlgo) {
|
|
//Initialize the internal height pass buffers:
|
|
this.heightBuffer = this.generateUint8Buffer(this.finalResultSize);
|
|
if (!BILINEARAlgo) {
|
|
this.outputHeightWorkBench = this.generateFloatBuffer(this.targetWidthMultipliedByChannels);
|
|
}
|
|
}
|
|
generateFloatBuffer(bufferLength) {
|
|
//Generate a float32 typed array buffer:
|
|
try {
|
|
return new Float32Array(bufferLength);
|
|
}
|
|
catch (error) {
|
|
return [];
|
|
}
|
|
}
|
|
generateUint8Buffer(bufferLength) {
|
|
//Generate a uint8 typed array buffer:
|
|
try {
|
|
return new Uint8Array(bufferLength);
|
|
}
|
|
catch (error) {
|
|
return [];
|
|
}
|
|
}
|
|
}
|