1 #ifndef IMDI_H 2 #define IMDI_H 3 4 /* Integer Multi-Dimensional Interpolation */ 5 /* 6 * Copyright 2000 - 2002 Graeme W. Gill 7 * All rights reserved. 8 * 9 * This material is licenced under the GNU GENERAL PUBLIC LICENCE :- 10 * see the Licence.txt file for licencing details. 11 */ 12 13 /* 14 * This software provides support for high speed integer 15 * multimensional interpolation. 16 */ 17 18 /* 19 * This file provides the common definitions for IMDI, and 20 * the data structures for communcating between the client 21 * imdi object. 22 */ 23 24 /* Pixel representation description */ 25 26 /* This is a high level macro desciption of the pixel layout. */ 27 /* It can be expanded by adding a new enumeration, and then */ 28 /* implementing the code in imdi_gen to translate the enumeration */ 29 /* into the exact pixlayout structure details. */ 30 31 typedef enum { 32 invalid_rep = 0, 33 pixint8 = 1, /* 8 Bits per value, pixel interleaved, no padding */ 34 planeint8 = 2, /* 8 bits per value, plane interleaved */ 35 pixint16 = 3, /* 16 Bits per value, pixel interleaved, no padding */ 36 planeint16 = 4 /* 16 bits per value, plane interleaved */ 37 } imdi_pixrep; 38 39 /* IMDI Object */ 40 struct _imdi { 41 void *impl; /* Pointer to implementation information */ 42 43 /* Do the interpolation */ 44 void (*interp)(struct _imdi *s, void **inp, void **outp, unsigned int npixels); 45 void (*done)(struct _imdi *s); /* Done with it */ 46 47 }; typedef struct _imdi imdi; 48 49 /* Create a new imdi */ 50 /* Return NULL if request is not supported */ 51 imdi *new_imdi( 52 int id, /* Number of input dimensions */ 53 int od, /* Number of output dimensions */ 54 imdi_pixrep in, /* Input pixel representation */ 55 int in_signed, /* Bit flag per channel, NZ if treat as signed */ 56 imdi_pixrep out,/* Output pixel representation */ 57 int out_signed, /* Bit flag per channel, NZ if treat as signed */ 58 int res, /* Desired table resolution */ 59 60 /* Callbacks to lookup the mdi table values */ 61 double (*input_curve) (void *cntx, int ch, double in_val), 62 void (*md_table) (void *cntx, double *out_vals, double *in_vals), 63 double (*output_curve)(void *cntx, int ch, double in_val), 64 void *cntx /* Context to callbacks */ 65 ); 66 67 #endif /* IMDI_H */ 68 69 70 71 72 73 74