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-rw-r--r--app/gegl/gimp-gegl-nodes.c260
1 files changed, 260 insertions, 0 deletions
diff --git a/app/gegl/gimp-gegl-nodes.c b/app/gegl/gimp-gegl-nodes.c
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+++ b/app/gegl/gimp-gegl-nodes.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimp-gegl-nodes.h
+ * Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+
+#include "gimp-gegl-types.h"
+
+#include "operations/layer-modes/gimp-layer-modes.h"
+
+#include "gimp-gegl-nodes.h"
+#include "gimp-gegl-utils.h"
+
+
+GeglNode *
+gimp_gegl_create_flatten_node (const GimpRGB *background,
+ GimpLayerColorSpace composite_space)
+{
+ GeglNode *node;
+ GeglNode *input;
+ GeglNode *output;
+ GeglNode *color;
+ GeglNode *mode;
+ GeglColor *c;
+
+ g_return_val_if_fail (background != NULL, NULL);
+ g_return_val_if_fail (composite_space == GIMP_LAYER_COLOR_SPACE_RGB_LINEAR ||
+ composite_space == GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL,
+ NULL);
+
+ node = gegl_node_new ();
+
+ input = gegl_node_get_input_proxy (node, "input");
+ output = gegl_node_get_output_proxy (node, "output");
+
+ c = gimp_gegl_color_new (background);
+ color = gegl_node_new_child (node,
+ "operation", "gegl:color",
+ "value", c,
+ "format", gimp_layer_mode_get_format (
+ GIMP_LAYER_MODE_NORMAL,
+ GIMP_LAYER_COLOR_SPACE_AUTO,
+ composite_space,
+ GIMP_LAYER_COMPOSITE_AUTO,
+ NULL),
+ NULL);
+ g_object_unref (c);
+
+ gimp_gegl_node_set_underlying_operation (node, color);
+
+ mode = gegl_node_new_child (node,
+ "operation", "gimp:normal",
+ NULL);
+ gimp_gegl_mode_node_set_mode (mode,
+ GIMP_LAYER_MODE_NORMAL,
+ GIMP_LAYER_COLOR_SPACE_AUTO,
+ composite_space,
+ GIMP_LAYER_COMPOSITE_AUTO);
+
+ gegl_node_connect_to (input, "output",
+ mode, "aux");
+ gegl_node_connect_to (color, "output",
+ mode, "input");
+ gegl_node_connect_to (mode, "output",
+ output, "input");
+
+ return node;
+}
+
+GeglNode *
+gimp_gegl_create_apply_opacity_node (GeglBuffer *mask,
+ gint mask_offset_x,
+ gint mask_offset_y,
+ gdouble opacity)
+{
+ GeglNode *node;
+ GeglNode *input;
+ GeglNode *output;
+ GeglNode *opacity_node;
+ GeglNode *mask_source;
+
+ g_return_val_if_fail (GEGL_IS_BUFFER (mask), NULL);
+
+ node = gegl_node_new ();
+
+ input = gegl_node_get_input_proxy (node, "input");
+ output = gegl_node_get_output_proxy (node, "output");
+
+ opacity_node = gegl_node_new_child (node,
+ "operation", "gegl:opacity",
+ "value", opacity,
+ NULL);
+
+ gimp_gegl_node_set_underlying_operation (node, opacity_node);
+
+ mask_source = gimp_gegl_add_buffer_source (node, mask,
+ mask_offset_x,
+ mask_offset_y);
+
+ gegl_node_connect_to (input, "output",
+ opacity_node, "input");
+ gegl_node_connect_to (mask_source, "output",
+ opacity_node, "aux");
+ gegl_node_connect_to (opacity_node, "output",
+ output, "input");
+
+ return node;
+}
+
+GeglNode *
+gimp_gegl_create_transform_node (const GimpMatrix3 *matrix)
+{
+ GeglNode *node;
+
+ g_return_val_if_fail (matrix != NULL, NULL);
+
+ node = gegl_node_new_child (NULL,
+ "operation", "gegl:transform",
+ NULL);
+
+ gimp_gegl_node_set_matrix (node, matrix);
+
+ return node;
+}
+
+GeglNode *
+gimp_gegl_add_buffer_source (GeglNode *parent,
+ GeglBuffer *buffer,
+ gint offset_x,
+ gint offset_y)
+{
+ GeglNode *buffer_source;
+
+ g_return_val_if_fail (GEGL_IS_NODE (parent), NULL);
+ g_return_val_if_fail (GEGL_IS_BUFFER (buffer), NULL);
+
+ buffer_source = gegl_node_new_child (parent,
+ "operation", "gegl:buffer-source",
+ "buffer", buffer,
+ NULL);
+
+ if (offset_x != 0 || offset_y != 0)
+ {
+ GeglNode *translate =
+ gegl_node_new_child (parent,
+ "operation", "gegl:translate",
+ "x", (gdouble) offset_x,
+ "y", (gdouble) offset_y,
+ NULL);
+
+ gegl_node_connect_to (buffer_source, "output",
+ translate, "input");
+
+ buffer_source = translate;
+ }
+
+ return buffer_source;
+}
+
+void
+gimp_gegl_mode_node_set_mode (GeglNode *node,
+ GimpLayerMode mode,
+ GimpLayerColorSpace blend_space,
+ GimpLayerColorSpace composite_space,
+ GimpLayerCompositeMode composite_mode)
+{
+ gdouble opacity;
+
+ g_return_if_fail (GEGL_IS_NODE (node));
+
+ if (blend_space == GIMP_LAYER_COLOR_SPACE_AUTO)
+ blend_space = gimp_layer_mode_get_blend_space (mode);
+
+ if (composite_space == GIMP_LAYER_COLOR_SPACE_AUTO)
+ composite_space = gimp_layer_mode_get_composite_space (mode);
+
+ if (composite_mode == GIMP_LAYER_COMPOSITE_AUTO)
+ composite_mode = gimp_layer_mode_get_composite_mode (mode);
+
+ gegl_node_get (node,
+ "opacity", &opacity,
+ NULL);
+
+ /* setting the operation creates a new instance, so we have to set
+ * all its properties
+ */
+ gegl_node_set (node,
+ "operation", gimp_layer_mode_get_operation (mode),
+ "layer-mode", mode,
+ "opacity", opacity,
+ "blend-space", blend_space,
+ "composite-space", composite_space,
+ "composite-mode", composite_mode,
+ NULL);
+}
+
+void
+gimp_gegl_mode_node_set_opacity (GeglNode *node,
+ gdouble opacity)
+{
+ g_return_if_fail (GEGL_IS_NODE (node));
+
+ gegl_node_set (node,
+ "opacity", opacity,
+ NULL);
+}
+
+void
+gimp_gegl_node_set_matrix (GeglNode *node,
+ const GimpMatrix3 *matrix)
+{
+ gchar *matrix_string;
+
+ g_return_if_fail (GEGL_IS_NODE (node));
+ g_return_if_fail (matrix != NULL);
+
+ matrix_string = gegl_matrix3_to_string ((GeglMatrix3 *) matrix);
+
+ gegl_node_set (node,
+ "transform", matrix_string,
+ NULL);
+
+ g_free (matrix_string);
+}
+
+void
+gimp_gegl_node_set_color (GeglNode *node,
+ const GimpRGB *color)
+{
+ GeglColor *gegl_color;
+
+ g_return_if_fail (GEGL_IS_NODE (node));
+ g_return_if_fail (color != NULL);
+
+ gegl_color = gimp_gegl_color_new (color);
+
+ gegl_node_set (node,
+ "value", gegl_color,
+ NULL);
+
+ g_object_unref (gegl_color);
+}
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