dmagick.c.quantum source code

1 module dmagick.c.quantum;
2 
3 import dmagick.c.cacheView;
4 import dmagick.c.exception;
5 import dmagick.c.image;
6 import dmagick.c.magickType;
7 import dmagick.c.magickVersion;
8 
9 extern(C)
10 {
11 	/**
12 	 * The endianess of the image when reading the image file.
13 	 */
14 	enum EndianType
15 	{
16 		UndefinedEndian, /// Not defined (default).
17 		LSBEndian,       /// Little Endian.
18 		MSBEndian        /// Big Endian.
19 	}
20 
21 	enum QuantumAlphaType
22 	{
23 		UndefinedQuantumAlpha,
24 		AssociatedQuantumAlpha,
25 		DisassociatedQuantumAlpha
26 	}
27 
28 	enum QuantumFormatType
29 	{
30 		UndefinedQuantumFormat,
31 		FloatingPointQuantumFormat,
32 		SignedQuantumFormat,
33 		UnsignedQuantumFormat
34 	}
35 
36 	enum QuantumType
37 	{
38 		UndefinedQuantum,
39 		AlphaQuantum,
40 		BlackQuantum,
41 		BlueQuantum,
42 		CMYKAQuantum,
43 		CMYKQuantum,
44 		CyanQuantum,
45 		GrayAlphaQuantum,
46 		GrayQuantum,
47 		GreenQuantum,
48 		IndexAlphaQuantum,
49 		IndexQuantum,
50 		MagentaQuantum,
51 		OpacityQuantum,
52 		RedQuantum,
53 		RGBAQuantum,
54 		BGRAQuantum,
55 		RGBOQuantum,
56 		RGBQuantum,
57 		YellowQuantum,
58 		GrayPadQuantum,
59 		RGBPadQuantum,
60 		CbYCrYQuantum,
61 		CbYCrQuantum,
62 		CbYCrAQuantum,
63 		CMYKOQuantum,
64 		BGRQuantum,
65 		BGROQuantum
66 	}
67 
68 	struct QuantumInfo {}
69 
70 	alias ClampToQuantum RoundToQuantum;
71 	static pure nothrow Quantum ClampToQuantum(const MagickRealType value)
72 	{
73 		version(MagickCore_HDRI)
74 		{
75 			return value;
76 		}
77 		else
78 		{
79 			if (value <= 0.0)
80 				return(cast(Quantum) 0);
81 			if (value >= cast(MagickRealType) QuantumRange)
82 				return(cast(Quantum) QuantumRange);
83 			return(cast(Quantum) (value+0.5));
84 		}
85 	}
86 
87 	static pure nothrow ubyte ScaleQuantumToChar(const Quantum quantum)
88 	{
89 		version(MagickCore_HDRI)
90 		{
91 			if ( quantum <= 0 )
92 				return 0;
93 			static if ( MagickQuantumDepth == 8 )
94 			{
95 				if ( quantum >= 255 )
96 					return 255;
97 				return cast(ubyte)(quantum+0.5);
98 			}
99 			else static if ( MagickQuantumDepth == 16 )
100 			{
101 				if ( quantum/257 >= 255)
102 					return 255;
103 				return cast(ubyte)(quantum/257+0.5);
104 			}
105 			else static if ( MagickQuantumDepth == 32 )
106 			{
107 				if ( quantum/16843009 >= 255)
108 					return 255;
109 				return cast(ubyte)(quantum/16843009+0.5);
110 			}
111 			else
112 			{
113 				if ( quantum/72340172838076673 >= 255)
114 					return 255;
115 				return cast(ubyte)(quantum/72340172838076673+0.5);
116 			}
117 		}
118 		else
119 		{
120 			static if ( MagickQuantumDepth == 8 )
121 				return quantum;
122 			else static if ( MagickQuantumDepth == 16 )
123 				return cast(ubyte) (((quantum+128UL)-((quantum+128UL) >> 8)) >> 8);
124 			else static if ( MagickQuantumDepth == 32 )
125 				return cast(ubyte) (quantum+8421504UL/16843009UL );
126 			else
127 				return cast(ubyte) (quantum/72340172838076673.0+0.5);
128 		}
129 	}
130 
131 	static pure nothrow Quantum ScaleCharToQuantum(ubyte value)
132 	{
133 		enum Quantum factor = QuantumRange/255;
134 
135 		return cast(Quantum)(factor*value);
136 	}
137 
138 	static if ( MagickLibVersion >= 0x681 )
139 	{
140 		EndianType GetQuantumEndian(const(QuantumInfo)*);
141 	}
142 
143 	MagickBooleanType SetQuantumDepth(const(Image)*, QuantumInfo*, const size_t);
144 
145 	static if ( MagickLibVersion >= 0x681 )
146 	{
147 		MagickBooleanType SetQuantumEndian(const(Image)*, QuantumInfo*, const EndianType);
148 	}
149 
150 	MagickBooleanType SetQuantumFormat(const(Image)*, QuantumInfo*, const QuantumFormatType);
151 	MagickBooleanType SetQuantumPad(const(Image)*, QuantumInfo*, const size_t);
152 
153 	static if ( MagickLibVersion >= 0x674 )
154 	{
155 		QuantumFormatType GetQuantumFormat(const(QuantumInfo)*);
156 	}
157 
158 	QuantumInfo* AcquireQuantumInfo(const(ImageInfo)*, Image*);
159 	QuantumInfo* DestroyQuantumInfo(QuantumInfo*);
160 
161 	QuantumType GetQuantumType(Image*, ExceptionInfo*);
162 
163 	size_t ExportQuantumPixels(const(Image)*, const(CacheView)*, const(QuantumInfo)*, const QuantumType, ubyte*, ExceptionInfo*);
164 	size_t GetQuantumExtent(const(Image)*, const(QuantumInfo)*, const QuantumType);
165 	size_t ImportQuantumPixels(Image*, CacheView*, const(QuantumInfo)*, const QuantumType, const(ubyte)*, ExceptionInfo*);
166 
167 	ubyte* GetQuantumPixels(const(QuantumInfo)*);
168 
169 	void GetQuantumInfo(const(ImageInfo)*, QuantumInfo*);
170 	void SetQuantumAlphaType(QuantumInfo*, const QuantumAlphaType);
171 	void SetQuantumImageType(Image*, const QuantumType);
172 	void SetQuantumMinIsWhite(QuantumInfo*, const MagickBooleanType);
173 	void SetQuantumPack(QuantumInfo*, const MagickBooleanType);
174 	void SetQuantumQuantum(QuantumInfo*, const size_t);
175 	void SetQuantumScale(QuantumInfo*, const double);
176 }