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/*
Copyright (C) 2011-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/
/*
WARNING: This file was generated by the dkct program (see
http://dktools.sourceforge.net/ for details).
Changes you make here will be lost if dkct is run again!
You should modify the original source and run dkct on it.
Original source: dk3pixre.ctr
*/
/** @file dk3pixre.c The dk3pixre module.
*/
#line 75 "dk3pixre.ctr"
#include "dk3all.h"
#include "dk3pixre.h"
#line 82 "dk3pixre.ctr"
dk3_bif_pixel_t
dk3pixre_maximum_for_width(size_t w)
{
dk3_bif_pixel_t back = 0;
unsigned val = 1;
size_t i;
for(i = 0; i < w; i++) {
val = val * 2;
}
if(val) {
val--;
back = (dk3_bif_pixel_t)val;
#if VERSION_BEFORE_20140809
if (((unsigned)back) != val) {
back = 0;
}
#else
if (val > (unsigned)(DK3_US_MAX)) {
back = 0;
}
#endif
}
return back;
}
int
dk3pixre_set(dk3_pixel_resample_t *pp, size_t inw, size_t outw)
{
int back = 0;
dk3_bif_pixel_t im;
dk3_bif_pixel_t om;
if (pp) {
im = dk3pixre_maximum_for_width(inw);
om = dk3pixre_maximum_for_width(outw);
if ((im) && (om)) {
pp->iw = inw;
pp->ow = outw;
pp->im = im;
pp->om = om;
pp->im2 = im / 2;
back = 1;
}
}
return back;
}
#if DK3_SIZEOF_INT >= (2 * DK3_SIZEOF_BIF_PIXEL_T)
/* BEGIN unsigned */
dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
unsigned counter;
unsigned res;
unsigned rem;
int ec = 0;
dk3_bif_pixel_t back;
back = inval;
if (pp) {
if (pp->iw != pp->ow) {
if (1 < pp->ow) {
counter = dk3ma_ui_mul_ok(
(unsigned)inval,
(unsigned)(pp->om),
&ec
);
if (0 == ec) {
if (pp->im) {
res = counter / (unsigned)(pp->im);
rem = counter % (unsigned)(pp->im);
if (rem > ((unsigned)(pp->im2))) { res++; }
back = (dk3_bif_pixel_t)res;
#if VERSION_BEFORE_20140809
if (((unsigned)back) != res) {
back = 0;
}
#else
if (res > (unsigned)(DK3_US_MAX)) {
back = 0;
}
#endif
}
}
} else {
back = ((inval > pp->im2) ? 1 : 0);
}
}
}
return back;
}
int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
unsigned counter;
unsigned rem;
unsigned res;
int ec = 0;
int back = 0;
#if VERSION_BEFORE_20140809
dk3_bif_pixel_t tv;
#endif
if (pp) {
if (pp->iw != pp->ow) {
if (1 < pp->ow) {
counter = dk3ma_ui_mul_ok(
(unsigned)inval,
(unsigned)(pp->om),
&ec
);
if (0 == ec) {
if (pp->im) {
res = counter / (unsigned)(pp->im);
rem = counter % (unsigned)(pp->im);
if (0 == rem) {
#if VERSION_BEFORE_20140809
tv = (dk3_bif_pixel_t)res;
if (((unsigned)tv) == res) {
back = 1;
}
#else
if (res <= (unsigned)(DK3_US_MAX)) {
back = 1;
}
#endif
}
}
}
} else {
if ((0 == inval) || (pp->im == inval)) { back = 1; }
}
} else {
back = 1;
}
}
return back;
}
/* END unsigned */
#else
#if DK3_SIZEOF_LONG >= (2 * DK3_SIZEOF_BIF_PIXEL_T)
/* BEGIN unsigned long */
dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
unsigned long counter;
unsigned long res;
unsigned long rem;
int ec = 0;
dk3_bif_pixel_t back;
back = inval;
if (pp) {
if (pp->iw != pp->ow) {
counter = dk3ma_ul_mul_ok(
(unsigned long)inval,
(unsigned long)(pp->om),
&ec
);
if (0 == ec) {
if (pp->im) {
res = counter / (unsigned long)(pp->im);
rem = counter % (unsigned long)(pp->im);
if (rem > (((unsigned long)(pp->im)) / 2UL)) { res++; }
back = (dk3_bif_pixel_t)res;
#if VERSION_BEFORE_20140809
if (((unsigned long)back) != res) {
back = 0;
}
#else
if (res > (unsigned long)(DK3_US_MAX)) {
back = 0;
}
#endif
}
}
}
}
return back;
}
int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
unsigned long counter;
unsigned long rem;
unsigned long res;
int ec = 0;
int back = 0;
#if VERSION_BEFORE_20140809
dk3_bif_pixel_t tv;
#endif
if (pp) {
if (pp->iw != pp->ow) {
counter = dk3ma_ul_mul_ok(
(unsigned long)inval,
(unsigned long)(pp->om),
&ec
);
if (0 == ec) {
if (pp->im) {
res = counter / (unsigned long)(pp->im);
rem = counter % (unsigned long)(pp->im);
if (0 == rem) {
#if VERSION_BEFORE_20140809
tv = (dk3_bif_pixel_t)res;
if (((unsigned long)tv) == res) {
back = 1;
}
#else
if (res <= (unsigned long)(DK3_US_MAX)) {
back = 1;
}
#endif
}
}
}
} else {
back = 1;
}
}
return back;
}
/* END unsigned long */
#else
/* BEGIN dk3_um_t */
dk3_bif_pixel_t
dk3pixre_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
dk3_um_t counter;
dk3_um_t res;
dk3_um_t rem;
int ec = 0;
dk3_bif_pixel_t back;
back = inval;
if (pp) {
if (pp->iw != pp->ow) {
counter = dk3ma_um_mul_ok(
(dk3_um_t)inval,
(dk3_um_t)(pp->om),
&ec
);
if (0 == ec) {
if (pp->im) {
res = counter / (dk3_um_t)(pp->im);
rem = counter % (dk3_um_t)(pp->im);
if (rem > (((dk3_um_t)(pp->im)) / DK3_UM_2)) { res++; }
back = (dk3_bif_pixel_t)res;
if (((dk3_um_t)back) != res) {
back = 0;
}
}
}
}
}
return back;
}
int
dk3pixre_can_convert(dk3_pixel_resample_t const *pp, dk3_bif_pixel_t inval)
{
dk3_um_t counter;
dk3_um_t rem;
dk3_um_t res;
int ec = 0;
int back = 0;
dk3_bif_pixel_t tv;
if (pp) {
if (pp->iw != pp->ow) {
counter = dk3ma_um_mul_ok(
(dk3_um_t)inval,
(dk3_um_t)(pp->om),
&ec
);
if (0 == ec) {
if (pp->im) {
res = counter / (dk3_um_t)(pp->im);
rem = counter % (dk3_um_t)(pp->im);
if (0 == rem) {
tv = (dk3_bif_pixel_t)res;
if (((dk3_um_t)tv) == res) {
back = 1;
}
}
}
}
} else {
back = 1;
}
}
return back;
}
/* END dk3_um_t */
#endif
#endif
dk3_bif_pixel_t
dk3pixre_get_value_from_packed_bytes(
unsigned char const *row,
dk3_bif_coord_t vi,
size_t bpc
)
{
unsigned short const *us;
unsigned char uc;
dk3_bif_coord_t byteindex;
dk3_bif_coord_t inbyte;
dk3_bif_pixel_t back = (dk3_bif_pixel_t)0;
switch(bpc) {
case 16: {
us = (unsigned short const *)row;
back = us[vi];
} break;
case 8: {
back = (dk3_bif_pixel_t)(row[vi]);
back &= 0x00FFU;
} break;
case 4: {
byteindex = vi / 2L;
inbyte = vi % 2L;
uc = row[byteindex];
switch((int)inbyte) {
case 0: {
uc = uc >> 4;
} break;
}
back = (dk3_bif_pixel_t)uc;
back &= 0x000FU;
} break;
case 2: {
byteindex = vi / 4L;
inbyte = vi % 4L;
uc = row[byteindex];
switch((int)inbyte) {
case 0: {
uc = uc >> 6;
} break;
case 1: {
uc = uc >> 4;
} break;
case 2: {
uc = uc >> 2;
} break;
}
back = (dk3_bif_pixel_t)uc;
back &= 0x0003U;
} break;
case 1: {
byteindex = vi / 8L;
inbyte = vi % 8L;
uc = row[byteindex];
switch((int)inbyte) {
case 0: { uc = uc >> 7; } break;
case 1: { uc = uc >> 6; } break;
case 2: { uc = uc >> 5; } break;
case 3: { uc = uc >> 4; } break;
case 4: { uc = uc >> 3; } break;
case 5: { uc = uc >> 2; } break;
case 6: { uc = uc >> 1; } break;
}
back = (dk3_bif_pixel_t)uc;
back &= 0x0001U;
} break;
}
return back;
}
dk3_bif_pixel_t
dk3pixre_get_max_value(dk3_pixel_resample_t const *pp)
{
dk3_bif_pixel_t back = (dk3_bif_pixel_t)0U;
if(pp) {
back = pp->om;
}
return back;
}
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