mirror of
https://github.com/tumic0/QtPBFImagePlugin.git
synced 2024-11-30 22:51:17 +01:00
53 lines
989 B
C++
53 lines
989 B
C++
#include <QImage>
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#include <QIODevice>
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#include <QtEndian>
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#include "gzip.h"
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#include "pbf.h"
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#include "pbfhandler.h"
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#define TILE_SIZE 512
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#define GZIP_MAGIC 0x1F8B0800
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bool PBFHandler::canRead() const
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{
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return canRead(device());
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}
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bool PBFHandler::canRead(QIODevice *device)
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{
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quint32 magic;
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qint64 size = device->peek((char*)&magic, sizeof(magic));
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return (size == sizeof(magic)
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&& (qFromBigEndian(magic) & 0xFFFFFF00) == GZIP_MAGIC);
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}
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bool PBFHandler::read(QImage *image)
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{
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QByteArray ba = Gzip::uncompress(device()->readAll());
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if (ba.isNull())
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return false;
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bool ok;
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int zoom = format().toInt(&ok);
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*image = PBF::image(ba, ok ? zoom : -1, _style, TILE_SIZE);
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return !image->isNull();
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}
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bool PBFHandler::supportsOption(ImageOption option) const
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{
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return (option == Size);
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}
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QVariant PBFHandler::option(ImageOption option) const
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{
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return (option == Size) ? QSize(TILE_SIZE, TILE_SIZE) : QVariant();
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}
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QByteArray PBFHandler::name() const
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{
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return "pbf";
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}
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