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I still see some limitations in GimpGradient, and in particular, they are still always stored as RGB in GGR files. It would be nice if we could store the actual color format. This way, if someone chooses a gradient stop as Lab or CMYK color, that's what the gradient file would keep track of. But also even storing the space of a color (instead of storing/loading always in sRGB, even though this may still work fine as we store unbounded double values). This might warrant for a v2 of GGR file format. This commit also fixes loading of SVG gradient which was apparently broken regarding hexadecimal color parsing. Finally I improve gegl_color_set_alpha() by adding an alpha channel when the initial format had none.
196 lines
6.6 KiB
C
196 lines
6.6 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpgradientselect.c
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* Copyright (C) 2004 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpbase/gimpbase.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "widgets-types.h"
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#include "core/gimp.h"
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#include "core/gimpcontext.h"
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#include "core/gimpgradient.h"
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#include "core/gimpparamspecs.h"
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#include "pdb/gimppdb.h"
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#include "gimpcontainerbox.h"
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#include "gimpdatafactoryview.h"
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#include "gimpgradientselect.h"
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enum
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{
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PROP_0,
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PROP_SAMPLE_SIZE
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};
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static void gimp_gradient_select_constructed (GObject *object);
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static void gimp_gradient_select_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static GimpValueArray * gimp_gradient_select_run_callback (GimpPdbDialog *dialog,
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GimpObject *object,
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gboolean closing,
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GError **error);
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G_DEFINE_TYPE (GimpGradientSelect, gimp_gradient_select,
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GIMP_TYPE_PDB_DIALOG)
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#define parent_class gimp_gradient_select_parent_class
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static void
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gimp_gradient_select_class_init (GimpGradientSelectClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpPdbDialogClass *pdb_class = GIMP_PDB_DIALOG_CLASS (klass);
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object_class->constructed = gimp_gradient_select_constructed;
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object_class->set_property = gimp_gradient_select_set_property;
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pdb_class->run_callback = gimp_gradient_select_run_callback;
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g_object_class_install_property (object_class, PROP_SAMPLE_SIZE,
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g_param_spec_int ("sample-size", NULL, NULL,
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0, 10000, 84,
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GIMP_PARAM_WRITABLE |
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G_PARAM_CONSTRUCT_ONLY));
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}
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static void
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gimp_gradient_select_init (GimpGradientSelect *select)
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{
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}
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static void
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gimp_gradient_select_constructed (GObject *object)
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{
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GimpPdbDialog *dialog = GIMP_PDB_DIALOG (object);
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GtkWidget *content_area;
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G_OBJECT_CLASS (parent_class)->constructed (object);
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dialog->view =
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gimp_data_factory_view_new (GIMP_VIEW_TYPE_LIST,
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dialog->context->gimp->gradient_factory,
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dialog->context,
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GIMP_VIEW_SIZE_MEDIUM, 1,
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dialog->menu_factory, "<Gradients>",
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"/gradients-popup",
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"gradients");
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gimp_container_box_set_size_request (GIMP_CONTAINER_BOX (GIMP_CONTAINER_EDITOR (dialog->view)->view),
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6 * (GIMP_VIEW_SIZE_MEDIUM + 2),
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6 * (GIMP_VIEW_SIZE_MEDIUM + 2));
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gtk_container_set_border_width (GTK_CONTAINER (dialog->view), 12);
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content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog));
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gtk_box_pack_start (GTK_BOX (content_area), dialog->view, TRUE, TRUE, 0);
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gtk_widget_show (dialog->view);
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}
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static void
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gimp_gradient_select_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GimpGradientSelect *select = GIMP_GRADIENT_SELECT (object);
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switch (property_id)
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{
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case PROP_SAMPLE_SIZE:
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select->sample_size = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static GimpValueArray *
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gimp_gradient_select_run_callback (GimpPdbDialog *dialog,
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GimpObject *object,
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gboolean closing,
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GError **error)
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{
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GimpGradient *gradient = GIMP_GRADIENT (object);
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GimpGradientSegment *seg = NULL;
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gdouble *values, *pv;
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gdouble pos, delta;
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gint i;
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GimpArray *array;
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GimpValueArray *return_vals;
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i = GIMP_GRADIENT_SELECT (dialog)->sample_size;
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pos = 0.0;
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delta = 1.0 / (i - 1);
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values = g_new (gdouble, 4 * i);
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pv = values;
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while (i--)
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{
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GeglColor *color = NULL;
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seg = gimp_gradient_get_color_at (gradient, dialog->caller_context,
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seg, pos, FALSE,
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GIMP_GRADIENT_BLEND_RGB_PERCEPTUAL,
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&color);
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gegl_color_get_pixel (color, babl_format ("R'G'B'A double"), pv);
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pv += 4;
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pos += delta;
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g_object_unref (color);
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}
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array = gimp_array_new ((guint8 *) values,
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GIMP_GRADIENT_SELECT (dialog)->sample_size * 4 *
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sizeof (gdouble),
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TRUE);
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array->static_data = FALSE;
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return_vals =
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gimp_pdb_execute_procedure_by_name (dialog->pdb,
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dialog->caller_context,
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NULL, error,
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dialog->callback_name,
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GIMP_TYPE_RESOURCE, object,
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G_TYPE_INT, array->length / sizeof (gdouble),
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GIMP_TYPE_FLOAT_ARRAY, array->data,
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G_TYPE_BOOLEAN, closing,
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G_TYPE_NONE);
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gimp_array_free (array);
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return return_vals;
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}
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