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Improved error handling + code cleanup

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This commit is contained in:
Martin Tůma 2018-05-24 22:11:00 +02:00
parent 31ff81576c
commit e4feeae064
1 changed files with 22 additions and 17 deletions
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39
src/map/jnxmap.cpp
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@ -6,6 +6,8 @@
#include "jnxmap.h"
#define ic2dc(x) ((x) * 180.0 / 0x7FFFFFFF)
struct Level {
quint32 count;
quint32 offset;
@ -59,17 +61,19 @@ bool JNXMap::readTiles()
&& readValue(levels)))
return false;
_bounds = RectC(Coordinates(lon1 * 180.0 / 0x7FFFFFFF, lat1 * 180.0
/ 0x7FFFFFFF), Coordinates(lon2 * 180.0 / 0x7FFFFFFF, lat2 * 180.0
/ 0x7FFFFFFF));
_bounds = RectC(Coordinates(ic2dc(lon1), ic2dc(lat1)),
Coordinates(ic2dc(lon2), ic2dc(lat2)));
if (!levels || !_bounds.isValid())
return false;
if (!_file.seek(version > 3 ? 0x34 : 0x30))
return false;
QVector<Level> lh(levels);
for (int i = 0; i < lh.count(); i++) {
if (!(readValue(lh[i].count) && readValue(lh[i].offset)
&& readValue(lh[i].scale)))
Level &l = lh[i];
if (!(readValue(l.count) && readValue(l.offset) && readValue(l.scale)))
return false;
if (version > 3) {
QByteArray ba;
@ -80,12 +84,15 @@ bool JNXMap::readTiles()
_zooms = QVector<Zoom>(lh.size());
for (int i = 0; i < lh.count(); i++) {
if (!_file.seek(lh.at(i).offset))
Zoom &z = _zooms[i];
const Level &l = lh.at(i);
if (!_file.seek(l.offset))
return false;
_zooms[i].tiles = QVector<Tile>(lh.at(i).count);
for (quint32 j = 0; j < lh.at(i).count; j++) {
Tile &tile = _zooms[i].tiles[j];
z.tiles = QVector<Tile>(l.count);
for (quint32 j = 0; j < l.count; j++) {
Tile &tile = z.tiles[j];
qint32 top, right, bottom, left;
quint16 width, height;
@ -95,19 +102,17 @@ bool JNXMap::readTiles()
&& readValue(tile.offset)))
return false;
RectD rect(PointD(left * 180.0 / 0x7FFFFFFF, top * 180.0
/ 0x7FFFFFFF), PointD(right * 180.0 / 0x7FFFFFFF, bottom * 180.0
/ 0x7FFFFFFF));
RectD rect(PointD(ic2dc(left), ic2dc(top)), PointD(ic2dc(right),
ic2dc(bottom)));
if (j == 0) {
ReferencePoint tl(PointD(0, 0), rect.topLeft());
ReferencePoint br(PointD(width, height), rect.bottomRight());
_zooms[i].transform = Transform(tl, br);
z.transform = Transform(tl, br);
}
const Transform &t = _zooms.at(i).transform;
QRectF trect(t.proj2img(rect.topLeft()),
t.proj2img(rect.bottomRight()));
QRectF trect(z.transform.proj2img(rect.topLeft()),
z.transform.proj2img(rect.bottomRight()));
tile.pos = trect.topLeft();
qreal min[2], max[2];
@ -115,7 +120,7 @@ bool JNXMap::readTiles()
min[1] = trect.top();
max[0] = trect.right();
max[1] = trect.bottom();
_zooms[i].tree.Insert(min, max, &tile);
z.tree.Insert(min, max, &tile);
}
}