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Remove Q_PACKED from structures that do not need to be packed

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These structures do not need to be packed. With some compilers, Q_PACKED
was defined to be empty, which means that the code was working fine
without packing. Or there were some lingering problems on those
platforms (MSVC) and we're now exposing them in all platforms.

Actually, it shouldn't be a problem anywhere. QCharAttributes, quint24
and QFontEngineQPA::Glyph have only char/uchar members, so they're
packed already (they have alignof == 1). The only platform where that
wasn't true was ARM OABI, which we don't support anymore.

QFontEngineQPA::Header seems to always come from a QByteArray, so it
doesn't neeed to be packed either. However, just to be sure, I'm
inserting a check for alignment.

And QFontEngineQPA::Block isn't used anywhere.

Change-Id: Iacfa25edf336ef2a03aeb6e40ae90937a21661ae
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
This commit is contained in:
Thiago Macieira 2013-09-12 14:32:52 -07:00 committed by The Qt Project
parent be8a76cffe
commit f4ebb06189
5 changed files with 7 additions and 6 deletions
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2
src/corelib/tools/qunicodetools_p.h
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@ -57,7 +57,7 @@
QT_BEGIN_NAMESPACE
struct Q_PACKED QCharAttributes
struct QCharAttributes
{
uchar graphemeBoundary : 1;
uchar wordBreak : 1;

2
src/gui/painting/qdrawhelper_p.h
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@ -702,7 +702,7 @@ struct quint24 {
quint24(uint value);
operator uint() const;
uchar data[3];
} Q_PACKED;
};
inline quint24::quint24(uint value)
{

1
src/gui/text/qfontengine_qpa.cpp
View File

@ -169,6 +169,7 @@ const QFontEngineQPA::Glyph *QFontEngineQPA::findGlyph(glyph_t g) const
bool QFontEngineQPA::verifyHeader(const uchar *data, int size)
{
VERIFY(quintptr(data) % Q_ALIGNOF(Header) == 0);
VERIFY(size >= int(sizeof(Header)));
const Header *header = reinterpret_cast<const Header *>(data);
if (header->magic[0] != 'Q'

6
src/gui/text/qfontengine_qpa_p.h
View File

@ -131,7 +131,7 @@ public:
GlyphBlock
};
struct Q_PACKED Header
struct Header
{
char magic[4]; // 'QPF2'
quint32 lock; // values: 0 = unlocked, 0xffffffff = read-only, otherwise qws client id of locking process
@ -140,14 +140,14 @@ public:
quint16 dataSize;
};
struct Q_PACKED Block
struct Block
{
quint16 tag;
quint16 pad;
quint32 dataSize;
};
struct Q_PACKED Glyph
struct Glyph
{
quint8 width;
quint8 height;

2
tests/auto/gui/painting/qpainter/tst_qpainter.cpp
View File

@ -2561,7 +2561,7 @@ public:
}
uchar data[3];
} Q_PACKED;
};
void tst_QPainter::drawhelper_blend_color()
{