gimp/libgimp/gimpgradients_pdb.c

/* LIBGIMP - The GIMP Library
 * Copyright (C) 1995-2000 Peter Mattis and Spencer Kimball
 *
 * gimpgradients_pdb.c
 *
 * This library 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 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/* NOTE: This file is autogenerated by pdbgen.pl */

#include "gimp.h"

/**
 * gimp_gradients_get_list:
 * @num_gradients: The number of loaded gradients.
 *
 * Retrieve the list of loaded gradients.
 *
 * This procedure returns a list of the gradients that are currently
 * loaded in the gradient editor. You can later use the
 * gimp_gradients_set_active function to set the active gradient.
 *
 * Returns: The list of gradient names.
 */
gchar **
gimp_gradients_get_list (gint *num_gradients)
{
  GimpParam *return_vals;
  gint nreturn_vals;
  gchar **gradient_names = NULL;
  gint i;

  return_vals = gimp_run_procedure ("gimp_gradients_get_list",
				    &nreturn_vals,
				    GIMP_PDB_END);

  *num_gradients = 0;

  if (return_vals[0].data.d_status == GIMP_PDB_SUCCESS)
    {
      *num_gradients = return_vals[1].data.d_int32;
      gradient_names = g_new (gchar *, *num_gradients);
      for (i = 0; i < *num_gradients; i++)
	gradient_names[i] = g_strdup (return_vals[2].data.d_stringarray[i]);
    }

  gimp_destroy_params (return_vals, nreturn_vals);

  return gradient_names;
}

/**
 * gimp_gradients_get_active:
 *
 * Retrieve the name of the active gradient.
 *
 * This procedure returns the name of the active gradient in the
 * gradient editor.
 *
 * Returns: The name of the active gradient.
 */
gchar *
gimp_gradients_get_active (void)
{
  GimpParam *return_vals;
  gint nreturn_vals;
  gchar *name = NULL;

  return_vals = gimp_run_procedure ("gimp_gradients_get_active",
				    &nreturn_vals,
				    GIMP_PDB_END);

  if (return_vals[0].data.d_status == GIMP_PDB_SUCCESS)
    name = g_strdup (return_vals[1].data.d_string);

  gimp_destroy_params (return_vals, nreturn_vals);

  return name;
}

/**
 * gimp_gradients_set_active:
 * @name: The name of the gradient to set.
 *
 * Sets the specified gradient as the active gradient.
 *
 * This procedure lets you set the specified gradient as the active or
 * \"current\" one. The name is simply a string which corresponds to
 * one of the loaded gradients in the gradient editor. If no matching
 * gradient is found, this procedure will return an error. Otherwise,
 * the specified gradient will become active and will be used for
 * subsequent custom gradient operations.
 *
 * Returns: TRUE on success.
 */
gboolean
gimp_gradients_set_active (gchar *name)
{
  GimpParam *return_vals;
  gint nreturn_vals;
  gboolean success = TRUE;

  return_vals = gimp_run_procedure ("gimp_gradients_set_active",
				    &nreturn_vals,
				    GIMP_PDB_STRING, name,
				    GIMP_PDB_END);

  success = return_vals[0].data.d_status == GIMP_PDB_SUCCESS;

  gimp_destroy_params (return_vals, nreturn_vals);

  return success;
}

/**
 * gimp_gradients_sample_uniform:
 * @num_samples: The number of samples to take.
 *
 * Sample the active gradient in uniform parts.
 *
 * This procedure samples the active gradient from the gradient editor
 * in the specified number of uniform parts. It returns a list of
 * floating-point values which correspond to the RGBA values for each
 * sample. The minimum number of samples to take is 2, in which case
 * the returned colors will correspond to the { 0.0, 1.0 } positions in
 * the gradient. For example, if the number of samples is 3, the
 * procedure will return the colors at positions { 0.0, 0.5, 1.0 }.
 *
 * Returns: Color samples: { R1, G1, B1, A1, ..., Rn, Gn, Bn, An }.
 */
gdouble *
gimp_gradients_sample_uniform (gint num_samples)
{
  GimpParam *return_vals;
  gint nreturn_vals;
  gdouble *color_samples = NULL;
  gint num_color_samples;

  return_vals = gimp_run_procedure ("gimp_gradients_sample_uniform",
				    &nreturn_vals,
				    GIMP_PDB_INT32, num_samples,
				    GIMP_PDB_END);

  if (return_vals[0].data.d_status == GIMP_PDB_SUCCESS)
    {
      num_color_samples = return_vals[1].data.d_int32;
      color_samples = g_new (gdouble, num_color_samples);
      memcpy (color_samples, return_vals[2].data.d_floatarray,
	      num_color_samples * sizeof (gdouble));
    }

  gimp_destroy_params (return_vals, nreturn_vals);

  return color_samples;
}

/**
 * gimp_gradients_sample_custom:
 * @num_samples: The number of samples to take.
 * @positions: The list of positions to sample along the gradient.
 *
 * Sample the active gradient in custom positions.
 *
 * This procedure samples the active gradient from the gradient editor
 * in the specified number of points. The procedure will sample the
 * gradient in the specified positions from the list. The left endpoint
 * of the gradient corresponds to position 0.0, and the right endpoint
 * corresponds to 1.0. The procedure returns a list of floating-point
 * values which correspond to the RGBA values for each sample.
 *
 * Returns: Color samples: { R1, G1, B1, A1, ..., Rn, Gn, Bn, An }.
 */
gdouble *
gimp_gradients_sample_custom (gint     num_samples,
			      gdouble *positions)
{
  GimpParam *return_vals;
  gint nreturn_vals;
  gdouble *color_samples = NULL;
  gint num_color_samples;

  return_vals = gimp_run_procedure ("gimp_gradients_sample_custom",
				    &nreturn_vals,
				    GIMP_PDB_INT32, num_samples,
				    GIMP_PDB_FLOATARRAY, positions,
				    GIMP_PDB_END);

  if (return_vals[0].data.d_status == GIMP_PDB_SUCCESS)
    {
      num_color_samples = return_vals[1].data.d_int32;
      color_samples = g_new (gdouble, num_color_samples);
      memcpy (color_samples, return_vals[2].data.d_floatarray,
	      num_color_samples * sizeof (gdouble));
    }

  gimp_destroy_params (return_vals, nreturn_vals);

  return color_samples;
}