00001 /** \file
00002 * \brief Image Conversion
00003 *
00004 * See Copyright Notice in im_lib.h
00005 * $Id: im_convert.h,v 1.4 2006/11/21 11:56:16 scuri Exp $
00006 */
00007
00008 #ifndef __IM_CONVERT_H
00009 #define __IM_CONVERT_H
00010
00011 #include "im_image.h"
00012
00013 #if defined(__cplusplus)
00014 extern "C" {
00015 #endif
00016
00017
00018 /** \defgroup convert Image Conversion
00019 * \par
00020 * Converts one type of image into another. Can convert between color modes
00021 * and between data types.
00022 * \par
00023 * See \ref im_convert.h
00024 * \ingroup imgclass */
00025
00026
00027 /** Complex to real conversions
00028 * \ingroup convert */
00029 enum imComplex2Real
00030 {
00031 IM_CPX_REAL,
00032 IM_CPX_IMAG,
00033 IM_CPX_MAG,
00034 IM_CPX_PHASE
00035 };
00036
00037 /** Predefined Gamma factors. Gamma can be any real number.
00038 * \ingroup convert */
00039 enum imGammaFactor
00040 {
00041 IM_GAMMA_LINEAR = 0,
00042 IM_GAMMA_LOGLITE = -10,
00043 IM_GAMMA_LOGHEAVY = -1000,
00044 IM_GAMMA_EXPLITE = 2,
00045 IM_GAMMA_EXPHEAVY = 7
00046 };
00047
00048 /** Predefined Cast Modes
00049 * \ingroup convert */
00050 enum imCastMode
00051 {
00052 IM_CAST_MINMAX, /**< scan for min and max values */
00053 IM_CAST_FIXED, /**< use predefied 0-max values, see \ref color Color Manipulation. */
00054 IM_CAST_DIRECT /**< direct type cast the value. Only byte and ushort will be cropped. */
00055 };
00056
00057 /** Changes the image data type, using a complex2real conversion,
00058 * a gamma factor, and an abssolute mode (modulus). \n
00059 * When demoting the data type the function will scan for min/max values or use fixed values (cast_mode)
00060 * to scale the result according to the destiny range. \n
00061 * Except complex to real that will use only the complex2real conversion. \n
00062 * Images must be of the same size and color mode. \n
00063 * Returns IM_ERR_NONE, IM_ERR_DATA or IM_ERR_COUNTER, see also \ref imErrorCodes.
00064 * See also \ref imComplex2Real, \ref imGammaFactor and \ref imCastMode.
00065 *
00066 * \verbatim im.ConvertDataType(src_image: imImage, dst_image: imImage, cpx2real: number, gamma: number, abssolute: bool, cast_mode: number) -> error: number [in Lua 5] \endverbatim
00067 * \ingroup convert */
00068 int imConvertDataType(const imImage* src_image, imImage* dst_image, int cpx2real, float gamma, int abssolute, int cast_mode);
00069
00070 /** Converts one color space to another. Images must be of the same size and data type. \n
00071 * CMYK can be converted to RGB only, and it is a very simple conversion. \n
00072 * All colors can be converted to Binary, the non zero gray values are converted to 1. \n
00073 * RGB to Map uses the median cut implementation from the free IJG JPEG software, copyright Thomas G. Lane. \n
00074 * All other color space conversions assume sRGB and CIE definitions. \n
00075 * Returns IM_ERR_NONE, IM_ERR_DATA or IM_ERR_COUNTER, see also \ref imErrorCodes.
00076 *
00077 * \verbatim im.ConvertColorSpace(src_image: imImage, dst_image: imImage) -> error: number [in Lua 5] \endverbatim
00078 * \ingroup convert */
00079 int imConvertColorSpace(const imImage* src_image, imImage* dst_image);
00080
00081 /** Converts the image to its bitmap equivalent,
00082 * uses \ref imConvertColorSpace and \ref imConvertDataType. \n
00083 * Returns IM_ERR_NONE, IM_ERR_DATA or IM_ERR_COUNTER, see also \ref imErrorCodes.
00084 * See also \ref imComplex2Real, \ref imGammaFactor and \ref imCastMode.
00085 *
00086 * \verbatim im.ConvertToBitmap(src_image: imImage, dst_image: imImage, cpx2real: number, gamma: number, abssolute: bool, cast_mode: number) -> error: number [in Lua 5] \endverbatim
00087 * \ingroup convert */
00088 int imConvertToBitmap(const imImage* src_image, imImage* dst_image, int cpx2real, float gamma, int abssolute, int cast_mode);
00089
00090
00091
00092 /** \defgroup cnvutil Raw Data Conversion Utilities
00093 * \par
00094 * Utilities for raw data buffers.
00095 * \par
00096 * See \ref im_convert.h
00097 * \ingroup imagerep */
00098
00099
00100 /** Changes the packing of the data buffer.
00101 * \ingroup cnvutil */
00102 void imConvertPacking(const void* src_data, void* dst_data, int width, int height, int depth, int data_type, int src_is_packed);
00103
00104 /** Changes in-place a MAP data into a RGB data. The data must have room for the RGB image. \n
00105 * depth can be 3 or 4. count=width*height. \n
00106 * Very usefull for OpenGL applications.
00107 * \ingroup cnvutil */
00108 void imConvertMapToRGB(unsigned char* data, int count, int depth, int packed, long* palette, int palette_count);
00109
00110
00111
00112 /* Converts a RGB bitmap into a map bitmap using the median cut algorithm.
00113 * Used only "im_convertcolor.cpp" implemented in "im_rgb2map.cpp".
00114 * Internal function kept here because of the compatibility module.
00115 * Will not be at the documentation. */
00116 int imConvertRGB2Map(int width, int height,
00117 unsigned char *red, unsigned char *green, unsigned char *blue,
00118 unsigned char *map, long *palette, int *palette_count);
00119
00120
00121 #if defined(__cplusplus)
00122 }
00123 #endif
00124
00125 #endif