scale-size.c 2.49 KB
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/* This file is part of GEGL
 *
 * GEGL is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * GEGL 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
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 * License along with GEGL; if not, see <https://www.gnu.org/licenses/>.
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 *
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 * Copyright 2006 Philip Lafleur
 *           2017 Øyvind Kolås
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 */

#include "config.h"
#include <glib/gi18n-lib.h>

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#ifdef GEGL_PROPERTIES
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property_double (x, _("X"), 100.0)
    description (_("Horizontal size"))
    ui_range (0.0, 20.0)
    value_range (-9000.0, 9000.0)
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property_double (y, _("Y"), 100.0)
    description (_("Vertical size"))
    ui_range (0.0, 20.0)
    value_range (-9000.0, 9000.0)
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#else

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#include "gegl-operation-filter.h"
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#include "scale.h"
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#define GEGL_OP_NO_SOURCE
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#define GEGL_OP_Parent  OpScale
#define GEGL_OP_PARENT  TYPE_OP_SCALE
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#define GEGL_OP_NAME    scale_size
#define GEGL_OP_BUNDLE
#define GEGL_OP_C_FILE  "scale-size.c"

#include "gegl-op.h"
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#include <math.h>

static void
create_matrix (OpTransform *op,
               GeglMatrix3 *matrix)
{
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  GeglProperties *o = GEGL_PROPERTIES (op);
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  GeglOperation *operation  = GEGL_OPERATION (op);
  GeglRectangle  in_rect = {0,0,0,0};

  if (gegl_operation_source_get_bounding_box (operation, "input"))
    in_rect = *gegl_operation_source_get_bounding_box (operation, "input");

  if(in_rect.width < 1)
    in_rect.width = 1;
  if(in_rect.height < 1)
    in_rect.height = 1;

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  matrix->coeff [0][0] = o->x / (gdouble) in_rect.width;
  matrix->coeff [1][1] = o->y / (gdouble) in_rect.height;
}

#include <stdio.h>

static void
gegl_op_class_init (GeglOpClass *klass)
{
  GeglOperationClass *operation_class;
  OpTransformClass   *transform_class;

  operation_class = GEGL_OPERATION_CLASS (klass);
  transform_class = OP_TRANSFORM_CLASS (klass);
  transform_class->create_matrix = create_matrix;

  gegl_operation_class_set_keys (operation_class,
    "name", "gegl:scale-size",
    "title", _("Scale size"),
    "categories", "transform",
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    "reference-hash", "36f5681fb636ea3bbb32edf3027c095a",
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    "description", _("Scales the buffer according to a size."),
    NULL);
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}

#endif