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-rw-r--r--src/gui/kernel/qpixelformat.h213
1 files changed, 112 insertions, 101 deletions
diff --git a/src/gui/kernel/qpixelformat.h b/src/gui/kernel/qpixelformat.h
index 95f36c6a3c..40d58f285a 100644
--- a/src/gui/kernel/qpixelformat.h
+++ b/src/gui/kernel/qpixelformat.h
@@ -48,6 +48,58 @@ QT_BEGIN_NAMESPACE
class QPixelFormat
{
+ // QPixelFormat basically is a glorified quint64, split into several fields.
+ // We could use bit-fields, but GCC at least generates horrible, horrible code for them,
+ // so we do the bit-twiddling ourselves.
+ enum FieldWidth {
+ ModelFieldWidth = 4,
+ FirstFieldWidth = 6,
+ SecondFieldWidth = FirstFieldWidth,
+ ThirdFieldWidth = FirstFieldWidth,
+ FourthFieldWidth = FirstFieldWidth,
+ FifthFieldWidth = FirstFieldWidth,
+ AlphaFieldWidth = FirstFieldWidth,
+ AlphaUsageFieldWidth = 1,
+ AlphaPositionFieldWidth = 1,
+ PremulFieldWidth = 1,
+ TypeInterpretationFieldWidth = 4,
+ ByteOrderFieldWidth = 2,
+ SubEnumFieldWidth = 6,
+ UnusedFieldWidth = 9,
+
+ TotalFieldWidthByWidths = ModelFieldWidth + FirstFieldWidth + SecondFieldWidth + ThirdFieldWidth +
+ FourthFieldWidth + FifthFieldWidth + AlphaFieldWidth + AlphaUsageFieldWidth +
+ AlphaPositionFieldWidth + PremulFieldWidth + TypeInterpretationFieldWidth +
+ ByteOrderFieldWidth + SubEnumFieldWidth + UnusedFieldWidth
+ };
+
+ enum Field {
+ ModelField = 0,
+ FirstField = ModelField + ModelFieldWidth,
+ SecondField = FirstField + FirstFieldWidth,
+ ThirdField = SecondField + SecondFieldWidth,
+ FourthField = ThirdField + ThirdFieldWidth,
+ FifthField = FourthField + FourthFieldWidth,
+ AlphaField = FifthField + FifthFieldWidth,
+ AlphaUsageField = AlphaField + AlphaFieldWidth,
+ AlphaPositionField = AlphaUsageField + AlphaUsageFieldWidth,
+ PremulField = AlphaPositionField + AlphaPositionFieldWidth,
+ TypeInterpretationField = PremulField + PremulFieldWidth,
+ ByteOrderField = TypeInterpretationField + TypeInterpretationFieldWidth,
+ SubEnumField = ByteOrderField + ByteOrderFieldWidth,
+ UnusedField = SubEnumField + SubEnumFieldWidth,
+
+ TotalFieldWidthByOffsets = UnusedField + UnusedFieldWidth
+ };
+
+ Q_STATIC_ASSERT(uint(TotalFieldWidthByWidths) == uint(TotalFieldWidthByOffsets));
+ Q_STATIC_ASSERT(uint(TotalFieldWidthByWidths) == 8 * sizeof(quint64));
+
+ Q_DECL_CONSTEXPR inline uchar get(Field offset, FieldWidth width) const Q_DECL_NOTHROW
+ { return uchar((data >> uint(offset)) & ((Q_UINT64_C(1) << uint(width)) - Q_UINT64_C(1))); }
+ Q_DECL_CONSTEXPR static inline quint64 set(Field offset, FieldWidth width, uchar value)
+ { return (quint64(value) & ((Q_UINT64_C(1) << uint(width)) - Q_UINT64_C(1))) << uint(offset); }
+
public:
enum ColorModel {
RGB,
@@ -122,61 +174,52 @@ public:
ByteOrder byteOrder = CurrentSystemEndian,
uchar subEnum = 0) Q_DECL_NOTHROW;
- Q_DECL_CONSTEXPR inline ColorModel colorModel() const Q_DECL_NOTHROW { return ColorModel(model); }
- Q_DECL_CONSTEXPR inline uchar channelCount() const Q_DECL_NOTHROW { return (first > 0) +
- (second > 0) +
- (third > 0) +
- (fourth > 0) +
- (fifth > 0) +
- (alpha > 0); }
-
- Q_DECL_CONSTEXPR inline uchar redSize() const Q_DECL_NOTHROW { return first; }
- Q_DECL_CONSTEXPR inline uchar greenSize() const Q_DECL_NOTHROW { return second; }
- Q_DECL_CONSTEXPR inline uchar blueSize() const Q_DECL_NOTHROW { return third; }
-
- Q_DECL_CONSTEXPR inline uchar cyanSize() const Q_DECL_NOTHROW { return first; }
- Q_DECL_CONSTEXPR inline uchar magentaSize() const Q_DECL_NOTHROW { return second; }
- Q_DECL_CONSTEXPR inline uchar yellowSize() const Q_DECL_NOTHROW { return third; }
- Q_DECL_CONSTEXPR inline uchar blackSize() const Q_DECL_NOTHROW { return fourth; }
-
- Q_DECL_CONSTEXPR inline uchar hueSize() const Q_DECL_NOTHROW { return first; }
- Q_DECL_CONSTEXPR inline uchar saturationSize() const Q_DECL_NOTHROW { return second; }
- Q_DECL_CONSTEXPR inline uchar lightnessSize() const Q_DECL_NOTHROW { return third; }
- Q_DECL_CONSTEXPR inline uchar brightnessSize() const Q_DECL_NOTHROW { return third; }
-
- Q_DECL_CONSTEXPR inline uchar alphaSize() const Q_DECL_NOTHROW { return alpha; }
-
- Q_DECL_CONSTEXPR inline uchar bitsPerPixel() const Q_DECL_NOTHROW { return first +
- second +
- third +
- fourth +
- fifth +
- alpha; }
-
- Q_DECL_CONSTEXPR inline AlphaUsage alphaUsage() const Q_DECL_NOTHROW { return AlphaUsage(alpha_usage); }
- Q_DECL_CONSTEXPR inline AlphaPosition alphaPosition() const Q_DECL_NOTHROW { return AlphaPosition(alpha_position); }
- Q_DECL_CONSTEXPR inline AlphaPremultiplied premultiplied() const Q_DECL_NOTHROW { return AlphaPremultiplied(premul); }
- Q_DECL_CONSTEXPR inline TypeInterpretation typeInterpretation() const Q_DECL_NOTHROW { return TypeInterpretation(type_interpretation); }
- Q_DECL_CONSTEXPR inline ByteOrder byteOrder() const Q_DECL_NOTHROW { return ByteOrder(byte_order); }
-
- Q_DECL_CONSTEXPR inline YUVLayout yuvLayout() const Q_DECL_NOTHROW { return YUVLayout(sub_enum); }
- Q_DECL_CONSTEXPR inline uchar subEnum() const Q_DECL_NOTHROW { return sub_enum; }
+ Q_DECL_CONSTEXPR inline ColorModel colorModel() const Q_DECL_NOTHROW { return ColorModel(get(ModelField, ModelFieldWidth)); }
+ Q_DECL_CONSTEXPR inline uchar channelCount() const Q_DECL_NOTHROW { return (get(FirstField, FirstFieldWidth) > 0) +
+ (get(SecondField, SecondFieldWidth) > 0) +
+ (get(ThirdField, ThirdFieldWidth) > 0) +
+ (get(FourthField, FourthFieldWidth) > 0) +
+ (get(FifthField, FifthFieldWidth) > 0) +
+ (get(AlphaField, AlphaFieldWidth) > 0); }
+
+ Q_DECL_CONSTEXPR inline uchar redSize() const Q_DECL_NOTHROW { return get(FirstField, FirstFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar greenSize() const Q_DECL_NOTHROW { return get(SecondField, SecondFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar blueSize() const Q_DECL_NOTHROW { return get(ThirdField, ThirdFieldWidth); }
+
+ Q_DECL_CONSTEXPR inline uchar cyanSize() const Q_DECL_NOTHROW { return get(FirstField, FirstFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar magentaSize() const Q_DECL_NOTHROW { return get(SecondField, SecondFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar yellowSize() const Q_DECL_NOTHROW { return get(ThirdField, ThirdFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar blackSize() const Q_DECL_NOTHROW { return get(FourthField, FourthFieldWidth); }
+
+ Q_DECL_CONSTEXPR inline uchar hueSize() const Q_DECL_NOTHROW { return get(FirstField, FirstFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar saturationSize() const Q_DECL_NOTHROW { return get(SecondField, SecondFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar lightnessSize() const Q_DECL_NOTHROW { return get(ThirdField, ThirdFieldWidth); }
+ Q_DECL_CONSTEXPR inline uchar brightnessSize() const Q_DECL_NOTHROW { return get(ThirdField, ThirdFieldWidth); }
+
+ Q_DECL_CONSTEXPR inline uchar alphaSize() const Q_DECL_NOTHROW { return get(AlphaField, AlphaFieldWidth); }
+
+ Q_DECL_CONSTEXPR inline uchar bitsPerPixel() const Q_DECL_NOTHROW { return get(FirstField, FirstFieldWidth) +
+ get(SecondField, SecondFieldWidth) +
+ get(ThirdField, ThirdFieldWidth) +
+ get(FourthField, FourthFieldWidth) +
+ get(FifthField, FifthFieldWidth) +
+ get(AlphaField, AlphaFieldWidth); }
+
+ Q_DECL_CONSTEXPR inline AlphaUsage alphaUsage() const Q_DECL_NOTHROW { return AlphaUsage(get(AlphaUsageField, AlphaUsageFieldWidth)); }
+ Q_DECL_CONSTEXPR inline AlphaPosition alphaPosition() const Q_DECL_NOTHROW { return AlphaPosition(get(AlphaPositionField, AlphaPositionFieldWidth)); }
+ Q_DECL_CONSTEXPR inline AlphaPremultiplied premultiplied() const Q_DECL_NOTHROW { return AlphaPremultiplied(get(PremulField, PremulFieldWidth)); }
+ Q_DECL_CONSTEXPR inline TypeInterpretation typeInterpretation() const Q_DECL_NOTHROW { return TypeInterpretation(get(TypeInterpretationField, TypeInterpretationFieldWidth)); }
+ Q_DECL_CONSTEXPR inline ByteOrder byteOrder() const Q_DECL_NOTHROW { return ByteOrder(get(ByteOrderField, ByteOrderFieldWidth)); }
+
+ Q_DECL_CONSTEXPR inline YUVLayout yuvLayout() const Q_DECL_NOTHROW { return YUVLayout(get(SubEnumField, SubEnumFieldWidth)); }
+ Q_DECL_CONSTEXPR inline uchar subEnum() const Q_DECL_NOTHROW { return get(SubEnumField, SubEnumFieldWidth); }
+
+private:
+ Q_DECL_CONSTEXPR static inline ByteOrder resolveByteOrder(ByteOrder bo)
+ { return bo == CurrentSystemEndian ? Q_BYTE_ORDER == Q_LITTLE_ENDIAN ? LittleEndian : BigEndian : bo ; }
private:
- quint64 model : 4;
- quint64 first : 6;
- quint64 second : 6;
- quint64 third : 6;
- quint64 fourth : 6;
- quint64 fifth : 6;
- quint64 alpha : 6;
- quint64 alpha_usage : 1;
- quint64 alpha_position : 1;
- quint64 premul: 1;
- quint64 type_interpretation : 4;
- quint64 byte_order : 2;
- quint64 sub_enum : 6;
- quint64 unused : 9;
+ quint64 data;
friend Q_DECL_CONST_FUNCTION Q_DECL_CONSTEXPR inline bool operator==(const QPixelFormat &fmt1, const QPixelFormat &fmt2);
friend Q_DECL_CONST_FUNCTION Q_DECL_CONSTEXPR inline bool operator!=(const QPixelFormat &fmt1, const QPixelFormat &fmt2);
@@ -263,20 +306,7 @@ public:
Q_DECL_CONSTEXPR
QPixelFormat::QPixelFormat() Q_DECL_NOTHROW
- : model(0)
- , first(0)
- , second(0)
- , third(0)
- , fourth(0)
- , fifth(0)
- , alpha(0)
- , alpha_usage(0)
- , alpha_position(0)
- , premul(0)
- , type_interpretation(0)
- , byte_order(0)
- , sub_enum(0)
- , unused(0)
+ : data(0)
{
}
@@ -294,44 +324,25 @@ QPixelFormat::QPixelFormat(ColorModel mdl,
TypeInterpretation typeInterp,
ByteOrder b_order,
uchar s_enum) Q_DECL_NOTHROW
- : model(mdl)
- , first(firstSize)
- , second(secondSize)
- , third(thirdSize)
- , fourth(fourthSize)
- , fifth(fifthSize)
- , alpha(alfa)
- , alpha_usage(usage)
- , alpha_position(position)
- , premul(premult)
- , type_interpretation(typeInterp)
-#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
- , byte_order(b_order == CurrentSystemEndian ? LittleEndian : b_order)
-#else
- , byte_order(b_order == CurrentSystemEndian ? BigEndian : b_order)
-#endif
- , sub_enum(s_enum)
- , unused(0)
+ : data(set(ModelField, ModelFieldWidth, uchar(mdl)) |
+ set(FirstField, FirstFieldWidth, firstSize) |
+ set(SecondField, SecondFieldWidth, secondSize) |
+ set(ThirdField, ThirdFieldWidth, thirdSize) |
+ set(FourthField, FourthFieldWidth, fourthSize) |
+ set(FifthField, FifthFieldWidth, fifthSize) |
+ set(AlphaField, AlphaFieldWidth, alfa) |
+ set(AlphaUsageField, AlphaUsageFieldWidth, uchar(usage)) |
+ set(AlphaPositionField, AlphaPositionFieldWidth, uchar(position)) |
+ set(PremulField, PremulFieldWidth, uchar(premult)) |
+ set(TypeInterpretationField, TypeInterpretationFieldWidth, uchar(typeInterp)) |
+ set(ByteOrderField, ByteOrderFieldWidth, uchar(resolveByteOrder(b_order))) |
+ set(SubEnumField, SubEnumFieldWidth, s_enum) |
+ set(UnusedField, UnusedFieldWidth, 0))
{
}
Q_DECL_CONST_FUNCTION Q_DECL_CONSTEXPR inline bool operator==(const QPixelFormat &fmt1, const QPixelFormat &fmt2)
-{
- return fmt1.model == fmt2.model
- && fmt1.first == fmt2.first
- && fmt1.second == fmt2.second
- && fmt1.third == fmt2.third
- && fmt1.fourth == fmt2.fourth
- && fmt1.fifth == fmt2.fifth
- && fmt1.alpha == fmt2.alpha
- && fmt1.alpha_usage == fmt2.alpha_usage
- && fmt1.alpha_position == fmt2.alpha_position
- && fmt1.premul == fmt2.premul
- && fmt1.type_interpretation == fmt2.type_interpretation
- && fmt1.byte_order == fmt2.byte_order
- && fmt1.sub_enum == fmt2.sub_enum
- && fmt1.unused == fmt2.unused;
-}
+{ return fmt1.data == fmt2.data; }
Q_DECL_CONST_FUNCTION Q_DECL_CONSTEXPR inline bool operator!=(const QPixelFormat &fmt1, const QPixelFormat &fmt2)
{ return !(fmt1 == fmt2); }
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 13:24:08 +0000