Initial import. Contains the im, cd and iup librairies, and a "working" Makefile for them under linux.

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+/** \file
+ * \brief Image Conversion
+ *
+ * See Copyright Notice in im_lib.h
+ */
+
+#ifndef __IM_CONVERT_H
+#define __IM_CONVERT_H
+
+#include "im_image.h"
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+                      
+/** \defgroup convert Image Conversion
+ * \par
+ * Converts one type of image into another. Can convert between color modes
+ * and between data types.
+ * \par
+ * See \ref im_convert.h
+ * \ingroup imgclass */
+
+
+/** Complex to real conversions
+ * \ingroup convert */
+enum imComplex2Real 
+{
+  IM_CPX_REAL, 
+  IM_CPX_IMAG, 
+  IM_CPX_MAG, 
+  IM_CPX_PHASE
+};
+
+/** Predefined Gamma factors. Gamma can be any real number.
+ * When gamma<0 use logarithmic, when gamma>0 use exponential.
+ * gamma(x,g) = ((e^(g*x))-1)/(exp(g)-1)
+ * gamma(x,g) = (log((g*x)+1))/(log(g+1))
+ * \ingroup convert */
+enum imGammaFactor
+{
+  IM_GAMMA_LINEAR   = 0,
+  IM_GAMMA_LOGLITE  = -10,
+  IM_GAMMA_LOGHEAVY = -1000,
+  IM_GAMMA_EXPLITE  = 2,
+  IM_GAMMA_EXPHEAVY = 7
+};
+
+/** Predefined Cast Modes
+ * \ingroup convert */
+enum imCastMode
+{
+  IM_CAST_MINMAX, /**< scan for min and max values */
+  IM_CAST_FIXED,  /**< use predefied 0-max values, see \ref color Color Manipulation. */
+  IM_CAST_DIRECT  /**< direct type cast the value. Only byte and ushort will be cropped. */
+};
+
+/** Changes the image data type, using a complex2real conversion, 
+ * a gamma factor, and an abssolute mode (modulus). \n
+ * When demoting the data type the function will scan for min/max values or use fixed values (cast_mode)
+ * to scale the result according to the destiny range. \n
+ * Except complex to real that will use only the complex2real conversion. \n
+ * Images must be of the same size and color mode. \n
+ * Returns IM_ERR_NONE, IM_ERR_DATA or IM_ERR_COUNTER, see also \ref imErrorCodes.
+ * See also \ref imComplex2Real, \ref imGammaFactor and \ref imCastMode.
+ *
+ * \verbatim im.ConvertDataType(src_image: imImage, dst_image: imImage, cpx2real: number, gamma: number, abssolute: boolean, cast_mode: number) -> error: number [in Lua 5] \endverbatim
+ * \verbatim im.ConvertDataTypeNew(image: imImage, data_type: number, cpx2real: number, gamma: number, abssolute: boolean, cast_mode: number) -> error: number, new_image: imImage  [in Lua 5] \endverbatim
+ * \ingroup convert */
+int imConvertDataType(const imImage* src_image, imImage* dst_image, int cpx2real, float gamma, int abssolute, int cast_mode);
+
+/** Converts one color space to another. Images must be of the same size and data type. \n
+ * CMYK can be converted to RGB only, and it is a very simple conversion. \n
+ * All colors can be converted to Binary, the non zero gray values are converted to 1. \n
+ * RGB to Map uses the median cut implementation from the free IJG JPEG software, copyright Thomas G. Lane. \n
+ * Alpha channel is considered and Transparency* attributes are converted to alpha channel. \n
+ * All other color space conversions assume sRGB and CIE definitions. \n
+ * Returns IM_ERR_NONE, IM_ERR_DATA or IM_ERR_COUNTER, see also \ref imErrorCodes.
+ *
+ * \verbatim im.ConvertColorSpace(src_image: imImage, dst_image: imImage) -> error: number [in Lua 5] \endverbatim
+ * \verbatim im.ConvertColorSpaceNew(image: imImage, color_space: number, has_alpha: boolean) -> error: number, new_image: imImage [in Lua 5] \endverbatim
+ * \ingroup convert */
+int imConvertColorSpace(const imImage* src_image, imImage* dst_image);
+
+/** Converts the image to its bitmap equivalent, 
+ * uses \ref imConvertColorSpace and \ref imConvertDataType. \n
+ * Returns IM_ERR_NONE, IM_ERR_DATA or IM_ERR_COUNTER, see also \ref imErrorCodes.
+ * See also \ref imComplex2Real, \ref imGammaFactor and \ref imCastMode. \n
+ * The function im.ConvertToBitmapNew uses the default convertion result from \ref imColorModeToBitmap if color_space is nil.
+ *
+ * \verbatim im.ConvertToBitmap(src_image: imImage, dst_image: imImage, cpx2real: number, gamma: number, abssolute: boolean, cast_mode: number) -> error: number [in Lua 5] \endverbatim
+ * \verbatim im.ConvertToBitmapNew(image: imImage, color_space: number, has_alpha: boolean, cpx2real: number, gamma: number, abssolute: boolean, cast_mode: number) -> error: number, new_image: imImage [in Lua 5] \endverbatim
+ * \ingroup convert */
+int imConvertToBitmap(const imImage* src_image, imImage* dst_image, int cpx2real, float gamma, int abssolute, int cast_mode);
+
+/** Returns an OpenGL compatible data buffer. Also returns the correspondant pixel format. \n
+ * The memory allocated is stored in the attribute "GLDATA" with BYTE type. And it will exists while the image exists. \n
+ * It can be cleared by setting the attribute to NULL. \n
+ * MAP images are converted to RGB, and BINARY images are converted to GRAY.
+ * Alpha channel is considered and Transparency* attributes are converted to alpha channel.
+ * So calculate depth from glformat, not from image depth.
+ *
+ * \verbatim image:GetOpenGLData() -> gldata: userdata, glformat: number [in Lua 5] \endverbatim
+ * \ingroup convert */
+void* imImageGetOpenGLData(const imImage* image, int *glformat);
+
+
+
+/** \defgroup cnvutil Raw Data Conversion Utilities
+ * \par
+ * Utilities for raw data buffers.
+ * \par
+ * See \ref im_convert.h
+ * \ingroup imagerep */
+
+
+/** Changes the packing of the data buffer. Both must have the same depth.
+ * \ingroup cnvutil */
+void imConvertPacking(const void* src_data, void* dst_data, int width, int height, int depth, int data_type, int src_is_packed);
+
+/** Changes in-place a MAP data into a RGB data. The data must have room for the RGB image. \n
+ * depth can be 3 or 4. count=width*height. \n
+ * \ingroup cnvutil */
+void imConvertMapToRGB(unsigned char* data, int count, int depth, int packed, long* palette, int palette_count);
+                       
+
+
+/* Converts a RGB bitmap into a map bitmap using the median cut algorithm.
+ * Used only "im_convertcolor.cpp" implemented in "im_rgb2map.cpp". 
+ * Internal function kept here because of the compatibility module. 
+ * Will not be at the documentation. */
+int imConvertRGB2Map(int width, int height, 
+              unsigned char *red, unsigned char *green, unsigned char *blue, 
+              unsigned char *map, long *palette, int *palette_count);
+
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif