Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 214 insertions, 0 deletions

diff --git a/app/operations/layer-modes/gimpoperationerase.c b/app/operations/layer-modes/gimpoperationerase.c
new file mode 100644
index 0000000..aae6eac
--- /dev/null
+++ b/app/operations/layer-modes/gimpoperationerase.c
@@ -0,0 +1,214 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationerase.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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimpoperationerase.h"
+
+
+static gboolean   gimp_operation_erase_process (GeglOperation       *op,
+                                                void                *in,
+                                                void                *layer,
+                                                void                *mask,
+                                                void                *out,
+                                                glong                samples,
+                                                const GeglRectangle *roi,
+                                                gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationErase, gimp_operation_erase,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+
+static void
+gimp_operation_erase_class_init (GimpOperationEraseClass *klass)
+{
+  GeglOperationClass          *operation_class  = GEGL_OPERATION_CLASS (klass);
+  GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:erase",
+                                 "description", "GIMP erase mode operation",
+                                 NULL);
+
+  layer_mode_class->process = gimp_operation_erase_process;
+}
+
+static void
+gimp_operation_erase_init (GimpOperationErase *self)
+{
+}
+
+static gboolean
+gimp_operation_erase_process (GeglOperation       *op,
+                              void                *in_p,
+                              void                *layer_p,
+                              void                *mask_p,
+                              void                *out_p,
+                              glong                samples,
+                              const GeglRectangle *roi,
+                              gint                 level)
+{
+  GimpOperationLayerMode *layer_mode = (gpointer) op;
+  gfloat                 *in         = in_p;
+  gfloat                 *out        = out_p;
+  gfloat                 *layer      = layer_p;
+  gfloat                 *mask       = mask_p;
+  gfloat                  opacity    = layer_mode->opacity;
+  const gboolean          has_mask   = mask != NULL;
+
+  switch (layer_mode->composite_mode)
+    {
+    case GIMP_LAYER_COMPOSITE_UNION:
+      while (samples--)
+        {
+          gfloat layer_alpha;
+          gfloat new_alpha;
+          gint   b;
+
+          layer_alpha = layer[ALPHA] * opacity;
+
+          if (has_mask)
+            layer_alpha *= (*mask);
+
+          new_alpha = in[ALPHA] + layer_alpha - 2.0f * in[ALPHA] * layer_alpha;
+
+          if (new_alpha != 0.0f)
+            {
+              gfloat ratio;
+
+              ratio = (1.0f - in[ALPHA]) * layer_alpha / new_alpha;
+
+              for (b = RED; b < ALPHA; b++)
+                {
+                  out[b] = ratio * layer[b] + (1.0f - ratio) * in[b];
+                }
+            }
+          else
+            {
+              for (b = RED; b < ALPHA; b++)
+                {
+                  out[b] = in[b];
+                }
+            }
+
+          out[ALPHA] = new_alpha;
+
+          in    += 4;
+          layer += 4;
+          out   += 4;
+
+          if (has_mask)
+            mask ++;
+        }
+      break;
+
+    case GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP:
+    case GIMP_LAYER_COMPOSITE_AUTO:
+      while (samples--)
+        {
+          gfloat layer_alpha;
+          gfloat new_alpha;
+          gint   b;
+
+          layer_alpha = layer[ALPHA] * opacity;
+
+          if (has_mask)
+            layer_alpha *= (*mask);
+
+          new_alpha = (1.0f - layer_alpha) * in[ALPHA];
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+
+          out[ALPHA] = new_alpha;
+
+          in    += 4;
+          layer += 4;
+          out   += 4;
+
+          if (has_mask)
+            mask ++;
+        }
+      break;
+
+    case GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER:
+      while (samples--)
+        {
+          gfloat        layer_alpha;
+          gfloat        new_alpha;
+          const gfloat *src;
+          gint          b;
+
+          layer_alpha = layer[ALPHA] * opacity;
+
+          if (has_mask)
+            layer_alpha *= (*mask);
+
+          new_alpha = (1.0f - in[ALPHA]) * layer_alpha;
+
+          src = layer;
+
+          if (new_alpha == 0.0f)
+            src = in;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = src[b];
+            }
+
+          out[ALPHA] = new_alpha;
+
+          in    += 4;
+          layer += 4;
+          out   += 4;
+
+          if (has_mask)
+            mask ++;
+        }
+      break;
+
+    case GIMP_LAYER_COMPOSITE_INTERSECTION:
+      while (samples--)
+        {
+          gint b;
+
+          for (b = RED; b < ALPHA; b++)
+            {
+              out[b] = in[b];
+            }
+
+          out[ALPHA] = 0.0f;
+
+          in    += 4;
+          out   += 4;
+        }
+      break;
+    }
+
+  return TRUE;
+}