C++ (Cpp) adjust_aabb Examples

Example #1

File: rotatepixels.c Project: CaptainSifff/darktable

// 2nd pass: which roi would this operation need as input to fill the given output region?
void modify_roi_in(dt_iop_module_t *self, dt_dev_pixelpipe_iop_t *piece, const dt_iop_roi_t *const roi_out,
                   dt_iop_roi_t *roi_in)
{
  *roi_in = *roi_out;

  const float scale = roi_in->scale / piece->iscale;

  float aabb[4] = { roi_out->x, roi_out->y, roi_out->x + roi_out->width, roi_out->y + roi_out->height };

  float aabb_in[4] = { INFINITY, INFINITY, -INFINITY, -INFINITY };

  for(int c = 0; c < 4; c++)
  {
    float p[2], o[2];

    // get corner points of roi_out
    get_corner(aabb, c, p);

    backtransform(piece, scale, p, o);

    // transform to roi_in space, get aabb.
    adjust_aabb(o, aabb_in);
  }

  const struct dt_interpolation *interpolation = dt_interpolation_new(DT_INTERPOLATION_USERPREF);
  const float IW = interpolation->width * scale;

  // adjust roi_in to minimally needed region
  roi_in->x = aabb_in[0] - IW;
  roi_in->y = aabb_in[1] - IW;
  roi_in->width = aabb_in[2] - roi_in->x + IW;
  roi_in->height = aabb_in[3] - roi_in->y + IW;
}

Example #2

File: rotatepixels.c Project: LebedevRI/darktable

// 2nd pass: which roi would this operation need as input to fill the given output region?
void modify_roi_in(dt_iop_module_t *self, dt_dev_pixelpipe_iop_t *piece, const dt_iop_roi_t *const roi_out,
                   dt_iop_roi_t *roi_in)
{
  *roi_in = *roi_out;

  const float scale = roi_in->scale / piece->iscale;

  float aabb[4] = { roi_out->x, roi_out->y, roi_out->x + roi_out->width, roi_out->y + roi_out->height };

  float aabb_in[4] = { INFINITY, INFINITY, -INFINITY, -INFINITY };

  for(int c = 0; c < 4; c++)
  {
    float p[2], o[2];

    // get corner points of roi_out
    get_corner(aabb, c, p);

    backtransform(piece, scale, p, o);

    // transform to roi_in space, get aabb.
    adjust_aabb(o, aabb_in);
  }

  const struct dt_interpolation *interpolation = dt_interpolation_new(DT_INTERPOLATION_USERPREF);
  const float IW = (float)interpolation->width * scale;

  const float orig_w = roi_in->scale * piece->buf_in.width, orig_h = roi_in->scale * piece->buf_in.height;

  // adjust roi_in to minimally needed region
  roi_in->x = fmaxf(0.0f, aabb_in[0] - IW);
  roi_in->y = fmaxf(0.0f, aabb_in[1] - IW);
  roi_in->width = fminf(orig_w - roi_in->x, aabb_in[2] - roi_in->x + IW);
  roi_in->height = fminf(orig_h - roi_in->y, aabb_in[3] - roi_in->y + IW);

  // sanity check.
  roi_in->x = CLAMP(roi_in->x, 0, (int)floorf(orig_w));
  roi_in->y = CLAMP(roi_in->y, 0, (int)floorf(orig_h));
  roi_in->width = CLAMP(roi_in->width, 1, (int)ceilf(orig_w) - roi_in->x);
  roi_in->height = CLAMP(roi_in->height, 1, (int)ceilf(orig_h) - roi_in->y);
}