app: split legacy out of grain extract and merge

2017-01-11 04:36:31 +01:00
parent 8f3842434c
commit ec1f7a94e3
21 changed files with 1019 additions and 187 deletions
--- a/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.c
+++ b/app/operations/layer-modes-legacy/gimpoperationgrainextractlegacy.c
@ -0,0 +1,138 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationgrainextractmode.c
+ * Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
+ *               2012 Ville Sokk <ville.sokk@gmail.com>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationgrainextractlegacy.h"
+
+
+static gboolean gimp_operation_grain_extract_legacy_process (GeglOperation       *operation,
+                                                           void                *in_buf,
+                                                           void                *aux_buf,
+                                                           void                *aux2_buf,
+                                                           void                *out_buf,
+                                                           glong                samples,
+                                                           const GeglRectangle *roi,
+                                                           gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationGrainExtractLegacy, gimp_operation_grain_extract_legacy,
+               GIMP_TYPE_OPERATION_POINT_LAYER_MODE)
+
+
+static void
+gimp_operation_grain_extract_legacy_class_init (GimpOperationGrainExtractLegacyClass *klass)
+{
+  GeglOperationClass               *operation_class;
+  GeglOperationPointComposer3Class *point_class;
+
+  operation_class = GEGL_OPERATION_CLASS (klass);
+  point_class     = GEGL_OPERATION_POINT_COMPOSER3_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:grain-extract-legacy",
+                                 "description", "GIMP grain extract mode operation",
+                                 NULL);
+
+  point_class->process = gimp_operation_grain_extract_legacy_process;
+}
+
+static void
+gimp_operation_grain_extract_legacy_init (GimpOperationGrainExtractLegacy *self)
+{
+}
+
+static gboolean
+gimp_operation_grain_extract_legacy_process (GeglOperation       *operation,
+                                             void                *in_buf,
+                                             void                *aux_buf,
+                                             void                *aux2_buf,
+                                             void                *out_buf,
+                                             glong                samples,
+                                             const GeglRectangle *roi,
+                                             gint                 level)
+{
+  gfloat opacity = GIMP_OPERATION_POINT_LAYER_MODE (operation)->opacity;
+
+  return gimp_operation_grain_extract_legacy_process_pixels (in_buf, aux_buf, aux2_buf, out_buf, opacity, samples, roi, level);
+}
+
+gboolean
+gimp_operation_grain_extract_legacy_process_pixels (gfloat              *in,
+                                                    gfloat              *layer,
+                                                    gfloat              *mask,
+                                                    gfloat              *out,
+                                                    gfloat               opacity,
+                                                    glong                samples,
+                                                    const GeglRectangle *roi,
+                                                    gint                 level)
+{
+  const gboolean has_mask = mask != NULL;
+
+  while (samples--)
+    {
+      gfloat comp_alpha, new_alpha;
+
+      comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
+      if (has_mask)
+        comp_alpha *= *mask;
+
+      new_alpha = in[ALPHA] + (1.0 - in[ALPHA]) * comp_alpha;
+
+      if (comp_alpha && new_alpha)
+        {
+          gfloat ratio = comp_alpha / new_alpha;
+          gint   b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              gfloat comp = in[b] - layer[b] + 0.5;
+
+              out[b] = comp * ratio + in[b] * (1.0 - ratio);
+              out[b] = CLAMP (out[b], 0.0, 1.0);
+            }
+        }
+      else
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+        }
+
+      out[ALPHA] = in[ALPHA];
+
+      in    += 4;
+      layer += 4;
+      out   += 4;
+
+      if (has_mask)
+        mask++;
+    }
+
+  return TRUE;
+}