void process(dt_iop_module_t *self, dt_dev_pixelpipe_iop_t *piece, const void *const ivoid, void *const ovoid,
const dt_iop_roi_t *const roi_in, const dt_iop_roi_t *const roi_out)
{
const int ch = piece->colors;
const int ch_width = ch * roi_in->width;
const struct dt_interpolation *interpolation = dt_interpolation_new(DT_INTERPOLATION_USERPREF);
const dt_iop_scalepixels_data_t * const d = piece->data;
#ifdef _OPENMP
#pragma omp parallel for schedule(static) default(none) shared(interpolation)
#endif
// (slow) point-by-point transformation.
// TODO: optimize with scanlines and linear steps between?
for(int j = 0; j < roi_out->height; j++)
{
float *out = ((float *)ovoid) + (size_t)4 * j * roi_out->width;
for(int i = 0; i < roi_out->width; i++, out += 4)
{
float x = i*d->x_scale;
float y = j*d->y_scale;
dt_interpolation_compute_pixel4c(interpolation, (float *)ivoid, out, x, y, roi_in->width,
roi_in->height, ch_width);
}
}
}
// 3rd (final) pass: you get this input region (may be different from what was requested above),
// do your best to fill the output region!
void process(dt_iop_module_t *self, dt_dev_pixelpipe_iop_t *piece, const void *const ivoid, void *const ovoid,
const dt_iop_roi_t *const roi_in, const dt_iop_roi_t *const roi_out)
{
const int ch = piece->colors;
const int ch_width = ch * roi_in->width;
const float scale = roi_in->scale / piece->iscale;
assert(ch == 4);
const struct dt_interpolation *interpolation = dt_interpolation_new(DT_INTERPOLATION_USERPREF);
#ifdef _OPENMP
#pragma omp parallel for schedule(static) default(none) shared(piece, interpolation)
#endif
// (slow) point-by-point transformation.
// TODO: optimize with scanlines and linear steps between?
for(int j = 0; j < roi_out->height; j++)
{
float *out = ((float *)ovoid) + (size_t)ch * j * roi_out->width;
for(int i = 0; i < roi_out->width; i++, out += ch)
{
float pi[2], po[2];
pi[0] = roi_out->x + i;
pi[1] = roi_out->y + j;
backtransform(piece, scale, pi, po);
po[0] -= roi_in->x;
po[1] -= roi_in->y;
dt_interpolation_compute_pixel4c(interpolation, (float *)ivoid, out, po[0], po[1], roi_in->width,
roi_in->height, ch_width);
}
}
}
