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diff --git a/dmagick/c/quantum.d b/dmagick/c/quantum.d
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+module dmagick.c.quantum;
+
+import dmagick.c.cacheView;
+import dmagick.c.exception;
+import dmagick.c.image;
+import dmagick.c.magickType;
+
+extern(C)
+{
+	enum EndianType
+	{
+		UndefinedEndian,
+		LSBEndian,
+		MSBEndian
+	}
+
+	enum QuantumAlphaType
+	{
+		UndefinedQuantumAlpha,
+		AssociatedQuantumAlpha,
+		DisassociatedQuantumAlpha
+	}
+
+	enum QuantumFormatType
+	{
+		UndefinedQuantumFormat,
+		FloatingPointQuantumFormat,
+		SignedQuantumFormat,
+		UnsignedQuantumFormat
+	}
+
+	enum QuantumType
+	{
+		UndefinedQuantum,
+		AlphaQuantum,
+		BlackQuantum,
+		BlueQuantum,
+		CMYKAQuantum,
+		CMYKQuantum,
+		CyanQuantum,
+		GrayAlphaQuantum,
+		GrayQuantum,
+		GreenQuantum,
+		IndexAlphaQuantum,
+		IndexQuantum,
+		MagentaQuantum,
+		OpacityQuantum,
+		RedQuantum,
+		RGBAQuantum,
+		BGRAQuantum,
+		RGBOQuantum,
+		RGBQuantum,
+		YellowQuantum,
+		GrayPadQuantum,
+		RGBPadQuantum,
+		CbYCrYQuantum,
+		CbYCrQuantum,
+		CbYCrAQuantum,
+		CMYKOQuantum,
+		BGRQuantum,
+		BGROQuantum
+	}
+
+	struct QuantumInfo {}
+
+	alias ClampToQuantum RoundToQuantum;
+	static pure nothrow Quantum ClampToQuantum(const MagickRealType value)
+	{
+		if (value <= 0.0)
+			return(cast(Quantum) 0);
+		if (value >= cast(MagickRealType) 65535UL)
+			return(cast(Quantum) 65535UL);
+		return(cast(Quantum) (value+0.5));
+	}
+
+	static pure nothrow ubyte ScaleQuantumToChar(const Quantum quantum)
+	{
+		return(cast(ubyte) (((quantum+128UL)-((quantum+128UL) >> 8)) >> 8));
+	}
+
+	MagickBooleanType SetQuantumDepth(const Image*, QuantumInfo*, const size_t);
+	MagickBooleanType SetQuantumFormat(const Image*, QuantumInfo*, const QuantumFormatType);
+	MagickBooleanType SetQuantumPad(const Image*, QuantumInfo*, const size_t);
+
+	QuantumInfo* AcquireQuantumInfo(const ImageInfo*, Image*);
+	QuantumInfo* DestroyQuantumInfo(QuantumInfo*);
+
+	QuantumType GetQuantumType(Image*, ExceptionInfo*);
+
+	size_t ExportQuantumPixels(const Image*, const CacheView*, const QuantumInfo*, const QuantumType, ubyte*, ExceptionInfo*);
+	size_t GetQuantumExtent(const Image*, const QuantumInfo*, const QuantumType);
+	size_t ImportQuantumPixels(Image*, CacheView*, const QuantumInfo*, const QuantumType, const ubyte*, ExceptionInfo*);
+
+	ubyte* GetQuantumPixels(const QuantumInfo*);
+
+	void GetQuantumInfo(const ImageInfo*, QuantumInfo*);
+	void SetQuantumAlphaType(QuantumInfo*, const QuantumAlphaType);
+	void SetQuantumImageType(Image*, const QuantumType);
+	void SetQuantumMinIsWhite(QuantumInfo*, const MagickBooleanType);
+	void SetQuantumPack(QuantumInfo*, const MagickBooleanType);
+	void SetQuantumQuantum(QuantumInfo*, const size_t);
+	void SetQuantumScale(QuantumInfo*, const double);
+}