interpolation.h

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/*
    This file is part of darktable,
    Copyright (C) 2012 Edouard Gomez.
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2013 Simon Spannagel.
    Copyright (C) 2014, 2016, 2019 Tobias Ellinghaus.
    Copyright (C) 2014-2015 Ulrich Pegelow.
    Copyright (C) 2016 Roman Lebedev.
    Copyright (C) 2017 luzpaz.
    Copyright (C) 2020-2021 Pascal Obry.
    Copyright (C) 2021 Hanno Schwalm.
    Copyright (C) 2022 Martin Bařinka.
    Copyright (C) 2024 Aurélien PIERRE.
    
    darktable is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    darktable is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#pragma once
 
#include "common/opencl.h"
#include "develop/pixelpipe_hb.h"
 
G_BEGIN_DECLS
 
enum dt_interpolation_type
{
  DT_INTERPOLATION_FIRST = 0,                         
  DT_INTERPOLATION_BILINEAR = DT_INTERPOLATION_FIRST, 
  DT_INTERPOLATION_BICUBIC,                           
  DT_INTERPOLATION_MITCHELL,                          
  DT_INTERPOLATION_LAST,                              
  DT_INTERPOLATION_DEFAULT = DT_INTERPOLATION_MITCHELL,
  DT_INTERPOLATION_DEFAULT_WARP = DT_INTERPOLATION_MITCHELL,
  DT_INTERPOLATION_USERPREF,  
  DT_INTERPOLATION_USERPREF_WARP  
};
 
typedef float (*dt_interpolation_func)(float *taps,
                                       size_t num_taps,
                                       float width,
                                       float first_tap,
                                       float interval);
 
struct dt_interpolation
{
  enum dt_interpolation_type id;     
  const char *name;                  
  size_t width;                      
  dt_interpolation_func maketaps;    
};
 
float dt_interpolation_compute_sample(const struct dt_interpolation *itor, const float *in, const float x,
                                      const float y, const int width, const int height,
                                      const int samplestride, const int linestride);
 
void dt_interpolation_compute_pixel4c(const struct dt_interpolation *itor, const float *in, float *out,
                                      const float x, const float y, const int width, const int height,
                                      const int linestride);
 
const struct dt_interpolation *dt_interpolation_new(enum dt_interpolation_type type);
 
void dt_interpolation_resample(const struct dt_interpolation *itor, float *out,
                               const dt_iop_roi_t *const roi_out,
                               const float *const in, const dt_iop_roi_t *const roi_in);
 
void dt_interpolation_resample_roi(const struct dt_interpolation *itor, float *out,
                                   const dt_iop_roi_t *const roi_out,
                                   const float *const in, const dt_iop_roi_t *const roi_in);
 
#ifdef HAVE_OPENCL
typedef struct dt_interpolation_cl_global_t
{
  int kernel_interpolation_resample;
} dt_interpolation_cl_global_t;
 
dt_interpolation_cl_global_t *dt_interpolation_init_cl_global(void);
 
void dt_interpolation_free_cl_global(dt_interpolation_cl_global_t *g);
 
 
int dt_interpolation_resample_cl(const struct dt_interpolation *itor, int devid, cl_mem dev_out,
                                 const dt_iop_roi_t *const roi_out, cl_mem dev_in,
                                 const dt_iop_roi_t *const roi_in);
 
int dt_interpolation_resample_roi_cl(const struct dt_interpolation *itor, int devid, cl_mem dev_out,
                                     const dt_iop_roi_t *const roi_out, cl_mem dev_in,
                                     const dt_iop_roi_t *const roi_in);
#endif
 
void dt_interpolation_resample_1c(const struct dt_interpolation *itor,
                                  float *out, const dt_iop_roi_t *const roi_out,
                                  const float *const in, const dt_iop_roi_t *const roi_in);
 
void dt_interpolation_resample_roi_1c(const struct dt_interpolation *itor,
                                      float *out, const dt_iop_roi_t *const roi_out,
                                      const float *const in, const dt_iop_roi_t *const roi_in);
 
G_END_DECLS
 
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