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// Qt-Security score:critical reason:data-parser
// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
// Security note: This file reads user provided cooked mesh files which are then
// fed to PhysX which creates meshes from these. This file also reads and writes
// mesh cache files but that is assumed to be safe.
#include "qcacheutils_p.h"
#include <QFile>
#include <QFileInfo>
#include <QtQml/QQmlFile>
#include <extensions/PxExtensionsAPI.h>
#include "qphysicsworld_p.h"
QT_BEGIN_NAMESPACE
namespace QCacheUtils {
enum class CacheGeometry { TriangleMesh, ConvexMesh, HeightField };
static QString MESH_CACHE_PATH = qEnvironmentVariable("QT_PHYSICS_CACHE_PATH");
static QString getCachedFilename(const QString &filePath, CacheGeometry geom)
{
const char *extension = "unknown_physx";
switch (geom) {
case CacheGeometry::TriangleMesh:
extension = "triangle_physx";
break;
case CacheGeometry::ConvexMesh:
extension = "convex_physx";
break;
case CacheGeometry::HeightField:
extension = "heightfield_physx";
break;
}
return QString::fromUtf8("%1/%2.%3")
.arg(MESH_CACHE_PATH, QFileInfo(filePath).fileName(), QLatin1StringView(extension));
}
static void readCachedMesh(const QString &meshFilename, physx::PxPhysics &physics,
physx::PxTriangleMesh *&triangleMesh, physx::PxConvexMesh *&convexMesh,
physx::PxHeightField *&heightField, CacheGeometry geom)
{
if (MESH_CACHE_PATH.isEmpty())
return;
QString cacheFilename = getCachedFilename(meshFilename, geom);
QFile cacheFile(cacheFilename);
QFile meshFile(meshFilename);
uchar *cacheData = nullptr;
uchar *meshData = nullptr;
auto cleanup = qScopeGuard([&] {
if (cacheData)
cacheFile.unmap(cacheData);
if (meshData)
meshFile.unmap(meshData);
if (cacheFile.isOpen())
cacheFile.close();
if (meshFile.isOpen())
meshFile.close();
});
if (!cacheFile.open(QIODevice::ReadOnly)) {
return;
}
if (!meshFile.open(QIODevice::ReadOnly)) {
qWarning() << "Could not open" << meshFilename;
return;
}
// first uint64 (8 bytes) is hash of input file
if (cacheFile.size() <= qint64(sizeof(uint64_t))) {
qWarning() << "Invalid convex mesh from file" << cacheFilename;
return;
}
cacheData = cacheFile.map(0, cacheFile.size());
if (!cacheData) {
qWarning() << "Could not map" << cacheFilename;
return;
}
uint64_t cacheHash = *reinterpret_cast<uint64_t *>(cacheData);
meshData = meshFile.map(0, meshFile.size());
if (!meshData) {
qWarning() << "Could not map" << meshFilename;
return;
}
uint64_t meshHash = qHash(QByteArrayView(meshData, meshFile.size()));
if (cacheHash != meshHash)
return; // hash is different, need to re-cook
physx::PxDefaultMemoryInputData input(cacheData + sizeof(uint64_t),
physx::PxU32(cacheFile.size() - sizeof(uint64_t)));
switch (geom) {
case CacheGeometry::TriangleMesh: {
triangleMesh = physics.createTriangleMesh(input);
qCDebug(lcQuick3dPhysics) << "Read triangle mesh" << triangleMesh << "from file"
<< cacheFilename;
break;
}
case CacheGeometry::ConvexMesh: {
convexMesh = physics.createConvexMesh(input);
qCDebug(lcQuick3dPhysics) << "Read convex mesh" << convexMesh << "from file"
<< cacheFilename;
break;
}
case CacheGeometry::HeightField:
heightField = physics.createHeightField(input);
qCDebug(lcQuick3dPhysics) << "Read height field" << heightField << "from file"
<< cacheFilename;
break;
}
}
static void writeCachedMesh(const QString &meshFilename, physx::PxDefaultMemoryOutputStream &buf,
CacheGeometry geom)
{
if (MESH_CACHE_PATH.isEmpty())
return;
QString cacheFilename = getCachedFilename(meshFilename, geom);
QFile cacheFile(cacheFilename);
QFile meshFile(meshFilename);
uchar *cacheData = nullptr;
uchar *meshData = nullptr;
auto cleanup = qScopeGuard([&] {
if (cacheData)
cacheFile.unmap(cacheData);
if (meshData)
meshFile.unmap(meshData);
if (cacheFile.isOpen())
cacheFile.close();
if (meshFile.isOpen())
meshFile.close();
});
if (!cacheFile.open(QIODevice::WriteOnly)) {
qCWarning(lcQuick3dPhysics) << "Could not open" << cacheFile.fileName() << "for writing.";
return;
}
if (!meshFile.open(QIODevice::ReadOnly)) {
qWarning() << "Could not open" << meshFilename;
return;
}
meshData = meshFile.map(0, meshFile.size());
if (!meshData) {
qWarning() << "Could not map" << meshFilename;
return;
}
uint64_t meshHash = qHash(QByteArrayView(meshData, meshFile.size()));
cacheFile.write(reinterpret_cast<char *>(&meshHash), sizeof(uint64_t));
cacheFile.write(reinterpret_cast<char *>(buf.getData()), buf.getSize());
cacheFile.close();
qCDebug(lcQuick3dPhysics) << "Wrote" << cacheFile.size() << "bytes to" << cacheFile.fileName();
}
void writeCachedTriangleMesh(const QString &filePath, physx::PxDefaultMemoryOutputStream &buf)
{
writeCachedMesh(filePath, buf, CacheGeometry::TriangleMesh);
}
void writeCachedConvexMesh(const QString &filePath, physx::PxDefaultMemoryOutputStream &buf)
{
writeCachedMesh(filePath, buf, CacheGeometry::ConvexMesh);
}
void writeCachedHeightField(const QString &filePath, physx::PxDefaultMemoryOutputStream &buf)
{
writeCachedMesh(filePath, buf, CacheGeometry::HeightField);
}
static void readCookedMesh(const QString &meshFilename, physx::PxPhysics &physics,
physx::PxTriangleMesh *&triangleMesh, physx::PxConvexMesh *&convexMesh,
physx::PxHeightField *&heightField, CacheGeometry geom)
{
QFile file(meshFilename);
uchar *data = nullptr;
auto cleanup = qScopeGuard([&] {
if (data)
file.unmap(data);
if (file.isOpen())
file.close();
});
if (!file.open(QIODevice::ReadOnly)) {
qWarning() << "Could not open" << meshFilename;
return;
}
data = file.map(0, file.size());
if (!data) {
qWarning() << "Could not map" << meshFilename;
return;
}
physx::PxDefaultMemoryInputData input(data, physx::PxU32(file.size()));
switch (geom) {
case CacheGeometry::TriangleMesh: {
triangleMesh = physics.createTriangleMesh(input);
break;
}
case CacheGeometry::ConvexMesh: {
convexMesh = physics.createConvexMesh(input);
break;
}
case CacheGeometry::HeightField:
heightField = physics.createHeightField(input);
break;
}
}
physx::PxTriangleMesh *readCachedTriangleMesh(const QString &filePath, physx::PxPhysics &physics)
{
physx::PxTriangleMesh *triangleMesh = nullptr;
physx::PxConvexMesh *convexMesh = nullptr;
physx::PxHeightField *heightField = nullptr;
readCachedMesh(filePath, physics, triangleMesh, convexMesh, heightField,
CacheGeometry::TriangleMesh);
return triangleMesh;
}
physx::PxConvexMesh *readCachedConvexMesh(const QString &filePath, physx::PxPhysics &physics)
{
physx::PxTriangleMesh *triangleMesh = nullptr;
physx::PxConvexMesh *convexMesh = nullptr;
physx::PxHeightField *heightField = nullptr;
readCachedMesh(filePath, physics, triangleMesh, convexMesh, heightField,
CacheGeometry::ConvexMesh);
return convexMesh;
}
physx::PxHeightField *readCachedHeightField(const QString &filePath, physx::PxPhysics &physics)
{
physx::PxTriangleMesh *triangleMesh = nullptr;
physx::PxConvexMesh *convexMesh = nullptr;
physx::PxHeightField *heightField = nullptr;
readCachedMesh(filePath, physics, triangleMesh, convexMesh, heightField,
CacheGeometry::HeightField);
return heightField;
}
physx::PxTriangleMesh *readCookedTriangleMesh(const QString &filePath, physx::PxPhysics &physics)
{
physx::PxTriangleMesh *triangleMesh = nullptr;
physx::PxConvexMesh *convexMesh = nullptr;
physx::PxHeightField *heightField = nullptr;
readCookedMesh(filePath, physics, triangleMesh, convexMesh, heightField,
CacheGeometry::TriangleMesh);
return triangleMesh;
}
physx::PxConvexMesh *readCookedConvexMesh(const QString &filePath, physx::PxPhysics &physics)
{
physx::PxTriangleMesh *triangleMesh = nullptr;
physx::PxConvexMesh *convexMesh = nullptr;
physx::PxHeightField *heightField = nullptr;
readCookedMesh(filePath, physics, triangleMesh, convexMesh, heightField,
CacheGeometry::ConvexMesh);
return convexMesh;
}
physx::PxHeightField *readCookedHeightField(const QString &filePath, physx::PxPhysics &physics)
{
physx::PxTriangleMesh *triangleMesh = nullptr;
physx::PxConvexMesh *convexMesh = nullptr;
physx::PxHeightField *heightField = nullptr;
readCookedMesh(filePath, physics, triangleMesh, convexMesh, heightField,
CacheGeometry::HeightField);
return heightField;
}
}
QT_END_NAMESPACE
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