Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 347 insertions, 0 deletions

diff --git a/app/operations/layer-modes/gimpoperationreplace.c b/app/operations/layer-modes/gimpoperationreplace.c
new file mode 100644
index 0000000..ed1ac19
--- /dev/null
+++ b/app/operations/layer-modes/gimpoperationreplace.c
@@ -0,0 +1,347 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationreplace.c
+ * Copyright (C) 2008 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 <string.h>
+
+#include <gegl-plugin.h>
+
+#include "../operations-types.h"
+
+#include "gimp-layer-modes.h"
+#include "gimpoperationreplace.h"
+
+
+static GeglRectangle              gimp_operation_replace_get_bounding_box    (GeglOperation        *op);
+
+static gboolean                   gimp_operation_replace_parent_process      (GeglOperation        *op,
+                                                                              GeglOperationContext *context,
+                                                                              const gchar          *output_prop,
+                                                                              const GeglRectangle  *result,
+                                                                              gint                  level);
+static gboolean                   gimp_operation_replace_process             (GeglOperation          *op,
+                                                                              void                   *in,
+                                                                              void                   *layer,
+                                                                              void                   *mask,
+                                                                              void                   *out,
+                                                                              glong                   samples,
+                                                                              const GeglRectangle    *roi,
+                                                                              gint                    level);
+static GimpLayerCompositeRegion   gimp_operation_replace_get_affected_region (GimpOperationLayerMode *layer_mode);
+
+
+G_DEFINE_TYPE (GimpOperationReplace, gimp_operation_replace,
+               GIMP_TYPE_OPERATION_LAYER_MODE)
+
+#define parent_class gimp_operation_replace_parent_class
+
+
+static void
+gimp_operation_replace_class_init (GimpOperationReplaceClass *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:replace",
+                                 "description", "GIMP replace mode operation",
+                                 NULL);
+
+  operation_class->get_bounding_box     = gimp_operation_replace_get_bounding_box;
+
+  layer_mode_class->parent_process      = gimp_operation_replace_parent_process;
+  layer_mode_class->process             = gimp_operation_replace_process;
+  layer_mode_class->get_affected_region = gimp_operation_replace_get_affected_region;
+}
+
+static void
+gimp_operation_replace_init (GimpOperationReplace *self)
+{
+}
+
+static GeglRectangle
+gimp_operation_replace_get_bounding_box (GeglOperation *op)
+{
+  GimpOperationLayerMode   *self     = (gpointer) op;
+  GeglRectangle            *in_rect;
+  GeglRectangle            *aux_rect;
+  GeglRectangle            *aux2_rect;
+  GeglRectangle             src_rect = {};
+  GeglRectangle             dst_rect = {};
+  GeglRectangle             result;
+  GimpLayerCompositeRegion  included_region;
+
+  in_rect   = gegl_operation_source_get_bounding_box (op, "input");
+  aux_rect  = gegl_operation_source_get_bounding_box (op, "aux");
+  aux2_rect = gegl_operation_source_get_bounding_box (op, "aux2");
+
+  if (in_rect)
+    dst_rect = *in_rect;
+
+  if (aux_rect)
+    {
+      src_rect = *aux_rect;
+
+      if (aux2_rect)
+        gegl_rectangle_intersect (&src_rect, &src_rect, aux2_rect);
+    }
+
+  if (self->is_last_node)
+    {
+      included_region = GIMP_LAYER_COMPOSITE_REGION_SOURCE;
+    }
+  else
+    {
+      included_region = gimp_layer_mode_get_included_region (self->layer_mode,
+                                                             self->composite_mode);
+    }
+
+  if (self->prop_opacity == 0.0)
+    included_region &= ~GIMP_LAYER_COMPOSITE_REGION_SOURCE;
+  else if (self->prop_opacity == 1.0 && ! aux2_rect)
+    included_region &= ~GIMP_LAYER_COMPOSITE_REGION_DESTINATION;
+
+  gegl_rectangle_intersect (&result, &src_rect, &dst_rect);
+
+  if (included_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE)
+    gegl_rectangle_bounding_box (&result, &result, &src_rect);
+
+  if (included_region & GIMP_LAYER_COMPOSITE_REGION_DESTINATION)
+    gegl_rectangle_bounding_box (&result, &result, &dst_rect);
+
+  return result;
+}
+
+static gboolean
+gimp_operation_replace_parent_process (GeglOperation        *op,
+                                       GeglOperationContext *context,
+                                       const gchar          *output_prop,
+                                       const GeglRectangle  *result,
+                                       gint                  level)
+{
+  GimpOperationLayerMode   *layer_mode = (gpointer) op;
+  GimpLayerCompositeRegion  included_region;
+
+  included_region = gimp_layer_mode_get_included_region
+    (layer_mode->layer_mode, layer_mode->composite_mode);
+
+  /* if the layer's opacity is 100%, it has no mask, and its composite mode
+   * contains "aux" (the latter should always be the case in practice,
+   * currently,) we can just pass "aux" directly as output.
+   */
+  if (layer_mode->opacity == 1.0                       &&
+      ! gegl_operation_context_get_object (context, "aux2") &&
+      (included_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE))
+    {
+      GObject *aux;
+
+      aux = gegl_operation_context_get_object (context, "aux");
+
+      gegl_operation_context_set_object (context, "output", aux);
+
+      return TRUE;
+    }
+  /* the opposite case, where the opacity is 0%, is handled by
+   * GimpOperationLayerMode.
+   */
+  else if (layer_mode->opacity == 0.0)
+    {
+    }
+  /* if both buffers are included in the result, and if both of them have the
+   * same content -- i.e., if they share the same storage, same alignment, and
+   * same abyss (or if the abyss is irrelevant) -- we can just pass either of
+   * them directly as output.
+   */
+  else if (included_region == GIMP_LAYER_COMPOSITE_REGION_UNION)
+    {
+      GObject *input;
+      GObject *aux;
+
+      input = gegl_operation_context_get_object (context, "input");
+      aux   = gegl_operation_context_get_object (context, "aux");
+
+      if (input && aux &&
+          gegl_buffer_share_storage (GEGL_BUFFER (input), GEGL_BUFFER (aux)))
+        {
+          gint input_shift_x;
+          gint input_shift_y;
+          gint aux_shift_x;
+          gint aux_shift_y;
+
+          g_object_get (input,
+                        "shift-x", &input_shift_x,
+                        "shift-y", &input_shift_y,
+                        NULL);
+          g_object_get (aux,
+                        "shift-x", &aux_shift_x,
+                        "shift-y", &aux_shift_y,
+                        NULL);
+
+          if (input_shift_x == aux_shift_x && input_shift_y == aux_shift_y)
+            {
+              const GeglRectangle *input_abyss;
+              const GeglRectangle *aux_abyss;
+
+              input_abyss = gegl_buffer_get_abyss (GEGL_BUFFER (input));
+              aux_abyss   = gegl_buffer_get_abyss (GEGL_BUFFER (aux));
+
+              if (gegl_rectangle_equal (input_abyss, aux_abyss)  ||
+                  (gegl_rectangle_contains (input_abyss, result) &&
+                   gegl_rectangle_contains (aux_abyss,   result)))
+                {
+                  gegl_operation_context_set_object (context, "output", input);
+
+                  return TRUE;
+                }
+            }
+        }
+    }
+
+  return GIMP_OPERATION_LAYER_MODE_CLASS (parent_class)->parent_process (
+    op, context, output_prop, result, level);
+}
+
+static gboolean
+gimp_operation_replace_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:
+    case GIMP_LAYER_COMPOSITE_AUTO:
+      while (samples--)
+        {
+          gfloat opacity_value = opacity;
+          gfloat new_alpha;
+          gfloat ratio;
+          gint   b;
+
+          if (has_mask)
+            opacity_value *= *mask;
+
+          new_alpha = (layer[ALPHA] - in[ALPHA]) * opacity_value + in[ALPHA];
+
+          ratio = opacity_value;
+
+          if (new_alpha)
+            ratio *= layer[ALPHA] / new_alpha;
+
+          for (b = RED; b < ALPHA; b++)
+            out[b] = (layer[b] - in[b]) * ratio + in[b];
+
+          out[ALPHA] = new_alpha;
+
+          in    += 4;
+          layer += 4;
+          out   += 4;
+
+          if (has_mask)
+            mask++;
+        }
+      break;
+
+    case GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP:
+      while (samples--)
+        {
+          gfloat opacity_value = opacity;
+          gfloat new_alpha;
+          gint   b;
+
+          if (has_mask)
+            opacity_value *= *mask;
+
+          new_alpha = in[ALPHA] * (1.0f - opacity_value);
+
+          for (b = RED; b < ALPHA; b++)
+            out[b] = in[b];
+
+          out[ALPHA] = new_alpha;
+
+          in  += 4;
+          out += 4;
+
+          if (has_mask)
+            mask++;
+        }
+      break;
+
+    case GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER:
+      while (samples--)
+        {
+          gfloat opacity_value = opacity;
+          gfloat new_alpha;
+          gint   b;
+
+          if (has_mask)
+            opacity_value *= *mask;
+
+          new_alpha = layer[ALPHA] * opacity_value;
+
+          for (b = RED; b < ALPHA; b++)
+            out[b] = layer[b];
+
+          out[ALPHA] = new_alpha;
+
+          in    += 4;
+          layer += 4;
+          out   += 4;
+
+          if (has_mask)
+            mask++;
+        }
+      break;
+
+    case GIMP_LAYER_COMPOSITE_INTERSECTION:
+      memset (out, 0, 4 * samples * sizeof (gfloat));
+      break;
+    }
+
+  return TRUE;
+}
+
+static GimpLayerCompositeRegion
+gimp_operation_replace_get_affected_region (GimpOperationLayerMode *layer_mode)
+{
+  GimpLayerCompositeRegion affected_region = GIMP_LAYER_COMPOSITE_REGION_INTERSECTION;
+
+  if (layer_mode->prop_opacity != 0.0)
+    affected_region |= GIMP_LAYER_COMPOSITE_REGION_DESTINATION;
+
+  /* if opacity != 1.0, or we have a mask, then we also affect SOURCE, but this
+   * is considered the case anyway, so no need for special handling.
+   */
+
+  return affected_region;
+}