//// ArrayBufferPrototype.cpp////// Created by Clement on 7/3/14.// Copyright 2014 High Fidelity, Inc.//// Distributed under the Apache License, Version 2.0.// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html//#include <glm/glm.hpp>#include <QBuffer>#include <QImage>#include "ArrayBufferClass.h"#include "ArrayBufferPrototype.h"static const int QCOMPRESS_HEADER_POSITION = 0;static const int QCOMPRESS_HEADER_SIZE = 4;Q_DECLARE_METATYPE(QByteArray*)ArrayBufferPrototype::ArrayBufferPrototype(QObject* parent) : QObject(parent) {}QByteArray ArrayBufferPrototype::slice(qint32 begin, qint32 end) const { QByteArray* ba = thisArrayBuffer(); // if indices < 0 then they start from the end of the array begin = (begin < 0) ? ba->size() + begin : begin; end = (end < 0) ? ba->size() + end : end; // here we clamp the indices to fit the array begin = glm::clamp(begin, 0, (ba->size() - 1)); end = glm::clamp(end, 0, (ba->size() - 1)); return (end - begin > 0) ? ba->mid(begin, end - begin) : QByteArray();}QByteArray ArrayBufferPrototype::slice(qint32 begin) const { QByteArray* ba = thisArrayBuffer(); // if indices < 0 then they start from the end of the array begin = (begin < 0) ? ba->size() + begin : begin; // here we clamp the indices to fit the array begin = glm::clamp(begin, 0, (ba->size() - 1)); return ba->mid(begin, -1);}QByteArray ArrayBufferPrototype::compress() const { // Compresses the ArrayBuffer data in Zlib format. QByteArray* ba = thisArrayBuffer(); QByteArray buffer = qCompress(*ba); buffer.remove(QCOMPRESS_HEADER_POSITION, QCOMPRESS_HEADER_SIZE); // Remove Qt's custom header to make it proper Zlib. return buffer;}QByteArray ArrayBufferPrototype::recodeImage(const QString& sourceFormat, const QString& targetFormat, qint32 maxSize) const { // Recodes image data if sourceFormat and targetFormat are different. // Rescales image data if either dimension is greater than the specified maximum. QByteArray* ba = thisArrayBuffer(); bool mustRecode = sourceFormat.toLower() != targetFormat.toLower(); QImage image = QImage::fromData(*ba); if (image.width() > maxSize || image.height() > maxSize) { image = image.scaled(maxSize, maxSize, Qt::KeepAspectRatio); mustRecode = true; } if (mustRecode) { QBuffer buffer; buffer.open(QIODevice::WriteOnly); std::string str = targetFormat.toUpper().toStdString(); const char* format = str.c_str(); image.save(&buffer, format); return buffer.data(); } return *ba;}QByteArray* ArrayBufferPrototype::thisArrayBuffer() const { return qscriptvalue_cast<QByteArray*>(thisObject().data());}
//
// ArrayBufferPrototype.cpp
//
//
// Created by Clement on 7/3/14.
// Copyright 2014 High Fidelity, Inc.
//
// Distributed under the Apache License, Version 2.0.
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
#include <glm/glm.hpp>
#include <QBuffer>
#include <QImage>
#include "ArrayBufferClass.h"
#include "ArrayBufferPrototype.h"
static const int QCOMPRESS_HEADER_POSITION = 0;
static const int QCOMPRESS_HEADER_SIZE = 4;
Q_DECLARE_METATYPE(QByteArray*)
ArrayBufferPrototype::ArrayBufferPrototype(QObject* parent) : QObject(parent) {
}
QByteArray ArrayBufferPrototype::slice(qint32 begin, qint32 end) const {
QByteArray* ba = thisArrayBuffer();
// if indices < 0 then they start from the end of the array
begin = (begin < 0) ? ba->size() + begin : begin;
end = (end < 0) ? ba->size() + end : end;
// here we clamp the indices to fit the array
begin = glm::clamp(begin, 0, (ba->size() - 1));
end = glm::clamp(end, 0, (ba->size() - 1));
return (end - begin > 0) ? ba->mid(begin, end - begin) : QByteArray();
}
QByteArray ArrayBufferPrototype::slice(qint32 begin) const {
QByteArray* ba = thisArrayBuffer();
// if indices < 0 then they start from the end of the array
begin = (begin < 0) ? ba->size() + begin : begin;
// here we clamp the indices to fit the array
begin = glm::clamp(begin, 0, (ba->size() - 1));
return ba->mid(begin, -1);
}
QByteArray ArrayBufferPrototype::compress() const {
// Compresses the ArrayBuffer data in Zlib format.
QByteArray* ba = thisArrayBuffer();
QByteArray buffer = qCompress(*ba);
buffer.remove(QCOMPRESS_HEADER_POSITION, QCOMPRESS_HEADER_SIZE); // Remove Qt's custom header to make it proper Zlib.
return buffer;
}
QByteArray ArrayBufferPrototype::recodeImage(const QString& sourceFormat, const QString& targetFormat, qint32 maxSize) const {
// Recodes image data if sourceFormat and targetFormat are different.
// Rescales image data if either dimension is greater than the specified maximum.
QByteArray* ba = thisArrayBuffer();
bool mustRecode = sourceFormat.toLower() != targetFormat.toLower();
QImage image = QImage::fromData(*ba);
if (image.width() > maxSize || image.height() > maxSize) {
image = image.scaled(maxSize, maxSize, Qt::KeepAspectRatio);
mustRecode = true;
}
if (mustRecode) {
QBuffer buffer;
buffer.open(QIODevice::WriteOnly);
std::string str = targetFormat.toUpper().toStdString();
const char* format = str.c_str();
image.save(&buffer, format);
return buffer.data();
}
return *ba;
}
QByteArray* ArrayBufferPrototype::thisArrayBuffer() const {
return qscriptvalue_cast<QByteArray*>(thisObject().data());
}