[gimp] app: fix compositing of layers with masks, outside the mask bounds



commit 646c804c04d889cded0afc6a1badc1b5064876aa
Author: Ell <ell_se yahoo com>
Date:   Fri Feb 21 21:58:15 2020 +0200

    app: fix compositing of layers with masks, outside the mask bounds
    
    In GimpOperationLayerMode, when the op has a mask connected, and
    we're processing an area outside the mask bounds, set the op's
    opacity to 0, so that the backdrop shows through.  The actual
    process() function gets a NULL mask pointer in this case, and so
    would composite the layer as if it had no mask, exposing areas that
    should be masked out.
    
    Add a GimpOperationLayerMode::parent_process() function, which
    subclasses can override instead of GeglOperation::process(), and
    make sure to update the GimpOperationLayerMode::opacity field
    before calling this function (and, subsequently, before calling
    GimpOperationLayerMode::process()).
    
    Clean up the rest of the fields, and adjust the rest of the code.

 .../layer-modes/gimpoperationantierase.c           |   2 +-
 app/operations/layer-modes/gimpoperationbehind.c   |   2 +-
 app/operations/layer-modes/gimpoperationdissolve.c |   8 +-
 app/operations/layer-modes/gimpoperationerase.c    |   2 +-
 .../layer-modes/gimpoperationlayermode.c           | 184 +++++++++++++--------
 .../layer-modes/gimpoperationlayermode.h           |  10 +-
 app/operations/layer-modes/gimpoperationmerge.c    |   2 +-
 .../layer-modes/gimpoperationnormal-sse2.c         |   2 +-
 .../layer-modes/gimpoperationnormal-sse4.c         |   2 +-
 app/operations/layer-modes/gimpoperationnormal.c   |   2 +-
 app/operations/layer-modes/gimpoperationreplace.c  |  20 +--
 app/operations/layer-modes/gimpoperationsplit.c    |   2 +-
 app/paint/gimppaintcore-loops.cc                   |  15 +-
 13 files changed, 154 insertions(+), 99 deletions(-)
---
diff --git a/app/operations/layer-modes/gimpoperationantierase.c 
b/app/operations/layer-modes/gimpoperationantierase.c
index ff217dd64c..3fb2947873 100644
--- a/app/operations/layer-modes/gimpoperationantierase.c
+++ b/app/operations/layer-modes/gimpoperationantierase.c
@@ -82,7 +82,7 @@ gimp_operation_anti_erase_process (GeglOperation       *op,
   gfloat                  opacity    = layer_mode->opacity;
   const gboolean          has_mask   = mask != NULL;
 
-  switch (layer_mode->real_composite_mode)
+  switch (layer_mode->composite_mode)
     {
     case GIMP_LAYER_COMPOSITE_UNION:
     case GIMP_LAYER_COMPOSITE_AUTO:
diff --git a/app/operations/layer-modes/gimpoperationbehind.c 
b/app/operations/layer-modes/gimpoperationbehind.c
index a46d5a1d95..1dc26303dd 100644
--- a/app/operations/layer-modes/gimpoperationbehind.c
+++ b/app/operations/layer-modes/gimpoperationbehind.c
@@ -80,7 +80,7 @@ gimp_operation_behind_process (GeglOperation       *op,
   gfloat                  opacity    = layer_mode->opacity;
   const gboolean          has_mask   = mask != NULL;
 
-  switch (layer_mode->real_composite_mode)
+  switch (layer_mode->composite_mode)
     {
     case GIMP_LAYER_COMPOSITE_UNION:
     case GIMP_LAYER_COMPOSITE_AUTO:
diff --git a/app/operations/layer-modes/gimpoperationdissolve.c 
b/app/operations/layer-modes/gimpoperationdissolve.c
index f59009b83b..293fadee11 100644
--- a/app/operations/layer-modes/gimpoperationdissolve.c
+++ b/app/operations/layer-modes/gimpoperationdissolve.c
@@ -120,8 +120,8 @@ gimp_operation_dissolve_process (GeglOperation       *op,
               out[1] = in[1];
               out[2] = in[2];
 
-              if (layer_mode->real_composite_mode == GIMP_LAYER_COMPOSITE_UNION ||
-                  layer_mode->real_composite_mode == GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP)
+              if (layer_mode->composite_mode == GIMP_LAYER_COMPOSITE_UNION ||
+                  layer_mode->composite_mode == GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP)
                 {
                   out[3] = in[3];
                 }
@@ -136,8 +136,8 @@ gimp_operation_dissolve_process (GeglOperation       *op,
               out[1] = layer[1];
               out[2] = layer[2];
 
-              if (layer_mode->real_composite_mode == GIMP_LAYER_COMPOSITE_UNION ||
-                  layer_mode->real_composite_mode == GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER)
+              if (layer_mode->composite_mode == GIMP_LAYER_COMPOSITE_UNION ||
+                  layer_mode->composite_mode == GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER)
                 {
                   out[3] = 1.0f;
                 }
diff --git a/app/operations/layer-modes/gimpoperationerase.c b/app/operations/layer-modes/gimpoperationerase.c
index 1d702644c0..aae6eac5f2 100644
--- a/app/operations/layer-modes/gimpoperationerase.c
+++ b/app/operations/layer-modes/gimpoperationerase.c
@@ -79,7 +79,7 @@ gimp_operation_erase_process (GeglOperation       *op,
   gfloat                  opacity    = layer_mode->opacity;
   const gboolean          has_mask   = mask != NULL;
 
-  switch (layer_mode->real_composite_mode)
+  switch (layer_mode->composite_mode)
     {
     case GIMP_LAYER_COMPOSITE_UNION:
       while (samples--)
diff --git a/app/operations/layer-modes/gimpoperationlayermode.c 
b/app/operations/layer-modes/gimpoperationlayermode.c
index 2a2cf30991..4cbb0455c5 100644
--- a/app/operations/layer-modes/gimpoperationlayermode.c
+++ b/app/operations/layer-modes/gimpoperationlayermode.c
@@ -68,49 +68,54 @@ typedef void (* CompositeFunc) (const gfloat *in,
                                 gint          samples);
 
 
-static void            gimp_operation_layer_mode_set_property     (GObject                *object,
-                                                                   guint                   property_id,
-                                                                   const GValue           *value,
-                                                                   GParamSpec             *pspec);
-static void            gimp_operation_layer_mode_get_property     (GObject                *object,
-                                                                   guint                   property_id,
-                                                                   GValue                 *value,
-                                                                   GParamSpec             *pspec);
-
-static void            gimp_operation_layer_mode_prepare          (GeglOperation          *operation);
-static GeglRectangle   gimp_operation_layer_mode_get_bounding_box (GeglOperation          *operation);
-static gboolean        gimp_operation_layer_mode_parent_process   (GeglOperation          *operation,
-                                                                   GeglOperationContext   *context,
-                                                                   const gchar            *output_prop,
-                                                                   const GeglRectangle    *result,
-                                                                   gint                    level);
-
-static gboolean        gimp_operation_layer_mode_process          (GeglOperation          *operation,
-                                                                   void                   *in,
-                                                                   void                   *layer,
-                                                                   void                   *mask,
-                                                                   void                   *out,
-                                                                   glong                   samples,
-                                                                   const GeglRectangle    *roi,
-                                                                   gint                    level);
-
-static gboolean        gimp_operation_layer_mode_real_process     (GeglOperation          *operation,
-                                                                   void                   *in,
-                                                                   void                   *layer,
-                                                                   void                   *mask,
-                                                                   void                   *out,
-                                                                   glong                   samples,
-                                                                   const GeglRectangle    *roi,
-                                                                   gint                    level);
-
-static gboolean        process_last_node                          (GeglOperation       *operation,
-                                                                   void                *in,
-                                                                   void                *layer,
-                                                                   void                *mask,
-                                                                   void                *out,
-                                                                   glong                samples,
-                                                                   const GeglRectangle *roi,
-                                                                   gint                 level);
+static void            gimp_operation_layer_mode_set_property        (GObject                *object,
+                                                                      guint                   property_id,
+                                                                      const GValue           *value,
+                                                                      GParamSpec             *pspec);
+static void            gimp_operation_layer_mode_get_property        (GObject                *object,
+                                                                      guint                   property_id,
+                                                                      GValue                 *value,
+                                                                      GParamSpec             *pspec);
+
+static void            gimp_operation_layer_mode_prepare             (GeglOperation          *operation);
+static GeglRectangle   gimp_operation_layer_mode_get_bounding_box    (GeglOperation          *operation);
+static gboolean        gimp_operation_layer_mode_parent_process      (GeglOperation          *operation,
+                                                                      GeglOperationContext   *context,
+                                                                      const gchar            *output_prop,
+                                                                      const GeglRectangle    *result,
+                                                                      gint                    level);
+
+static gboolean        gimp_operation_layer_mode_process             (GeglOperation          *operation,
+                                                                      void                   *in,
+                                                                      void                   *layer,
+                                                                      void                   *mask,
+                                                                      void                   *out,
+                                                                      glong                   samples,
+                                                                      const GeglRectangle    *roi,
+                                                                      gint                    level);
+
+static gboolean        gimp_operation_layer_mode_real_parent_process (GeglOperation          *operation,
+                                                                      GeglOperationContext   *context,
+                                                                      const gchar            *output_prop,
+                                                                      const GeglRectangle    *result,
+                                                                      gint                    level);
+static gboolean        gimp_operation_layer_mode_real_process        (GeglOperation          *operation,
+                                                                      void                   *in,
+                                                                      void                   *layer,
+                                                                      void                   *mask,
+                                                                      void                   *out,
+                                                                      glong                   samples,
+                                                                      const GeglRectangle    *roi,
+                                                                      gint                    level);
+
+static gboolean        process_last_node                             (GeglOperation       *operation,
+                                                                      void                *in,
+                                                                      void                *layer,
+                                                                      void                *mask,
+                                                                      void                *out,
+                                                                      glong                samples,
+                                                                      const GeglRectangle *roi,
+                                                                      gint                 level);
 
 
 G_DEFINE_TYPE (GimpOperationLayerMode, gimp_operation_layer_mode,
@@ -148,6 +153,7 @@ gimp_operation_layer_mode_class_init (GimpOperationLayerModeClass *klass)
 
   point_composer3_class->process    = gimp_operation_layer_mode_process;
 
+  klass->parent_process             = gimp_operation_layer_mode_real_parent_process;
   klass->process                    = gimp_operation_layer_mode_real_process;
   klass->get_affected_region        = NULL;
 
@@ -218,7 +224,7 @@ gimp_operation_layer_mode_set_property (GObject      *object,
       break;
 
     case PROP_OPACITY:
-      self->opacity = g_value_get_double (value);
+      self->prop_opacity = g_value_get_double (value);
       break;
 
     case PROP_BLEND_SPACE:
@@ -230,7 +236,7 @@ gimp_operation_layer_mode_set_property (GObject      *object,
       break;
 
     case PROP_COMPOSITE_MODE:
-      self->composite_mode = g_value_get_enum (value);
+      self->prop_composite_mode = g_value_get_enum (value);
       break;
 
     default:
@@ -254,7 +260,7 @@ gimp_operation_layer_mode_get_property (GObject    *object,
       break;
 
     case PROP_OPACITY:
-      g_value_set_double (value, self->opacity);
+      g_value_set_double (value, self->prop_opacity);
       break;
 
     case PROP_BLEND_SPACE:
@@ -266,7 +272,7 @@ gimp_operation_layer_mode_get_property (GObject    *object,
       break;
 
     case PROP_COMPOSITE_MODE:
-      g_value_set_enum (value, self->composite_mode);
+      g_value_set_enum (value, self->prop_composite_mode);
       break;
 
     default:
@@ -280,23 +286,25 @@ gimp_operation_layer_mode_prepare (GeglOperation *operation)
 {
   GimpOperationLayerMode *self = GIMP_OPERATION_LAYER_MODE (operation);
   const GeglRectangle    *input_extent;
+  const GeglRectangle    *mask_extent;
   const Babl             *preferred_format;
   const Babl             *format;
 
-  self->real_composite_mode = self->composite_mode;
+  self->composite_mode = self->prop_composite_mode;
 
-  if (self->real_composite_mode == GIMP_LAYER_COMPOSITE_AUTO)
+  if (self->composite_mode == GIMP_LAYER_COMPOSITE_AUTO)
     {
-      self->real_composite_mode =
+      self->composite_mode =
         gimp_layer_mode_get_composite_mode (self->layer_mode);
 
-      g_warn_if_fail (self->real_composite_mode != GIMP_LAYER_COMPOSITE_AUTO);
+      g_warn_if_fail (self->composite_mode != GIMP_LAYER_COMPOSITE_AUTO);
     }
 
   self->function       = gimp_layer_mode_get_function       (self->layer_mode);
   self->blend_function = gimp_layer_mode_get_blend_function (self->layer_mode);
 
   input_extent = gegl_operation_source_get_bounding_box (operation, "input");
+  mask_extent  = gegl_operation_source_get_bounding_box (operation, "aux2");
 
   /* if the input pad has data, work as usual. */
   if (input_extent && ! gegl_rectangle_is_empty (input_extent))
@@ -325,12 +333,14 @@ gimp_operation_layer_mode_prepare (GeglOperation *operation)
        */
       else
         {
-          self->real_composite_mode = GIMP_LAYER_COMPOSITE_UNION;
+          self->composite_mode = GIMP_LAYER_COMPOSITE_UNION;
         }
 
       preferred_format = gegl_operation_get_source_format (operation, "aux");
     }
 
+  self->has_mask = mask_extent && ! gegl_rectangle_is_empty (mask_extent);
+
   format = gimp_layer_mode_get_format (self->layer_mode,
                                        self->blend_space,
                                        self->composite_space,
@@ -417,7 +427,7 @@ gimp_operation_layer_mode_get_bounding_box (GeglOperation *op)
                                                              self->composite_mode);
     }
 
-  if (self->opacity == 0.0)
+  if (self->prop_opacity == 0.0)
     included_region &= ~GIMP_LAYER_COMPOSITE_REGION_SOURCE;
 
   gegl_rectangle_intersect (&result, &src_rect, &dst_rect);
@@ -437,6 +447,58 @@ gimp_operation_layer_mode_parent_process (GeglOperation        *operation,
                                           const gchar          *output_prop,
                                           const GeglRectangle  *result,
                                           gint                  level)
+{
+  GimpOperationLayerMode *point = GIMP_OPERATION_LAYER_MODE (operation);
+
+  point->opacity = point->prop_opacity;
+
+  /* if we have a mask, but it's not included in the output, pretend the
+   * opacity is 0, so that we don't composite 'aux' over 'input' as if there
+   * was no mask.
+   */
+  if (point->has_mask)
+    {
+      GObject  *mask;
+      gboolean  has_mask;
+
+      /* get the raw value.  this does not increase the reference count. */
+      mask = gegl_operation_context_get_object (context, "aux2");
+
+      /* disregard 'mask' if it's not included in the roi. */
+      has_mask =
+        mask &&
+        gegl_rectangle_intersect (NULL,
+                                  gegl_buffer_get_extent (GEGL_BUFFER (mask)),
+                                  result);
+
+      if (! has_mask)
+        point->opacity = 0.0;
+    }
+
+  return GIMP_OPERATION_LAYER_MODE_GET_CLASS (point)->parent_process (
+    operation, context, output_prop, result, level);
+}
+
+static gboolean
+gimp_operation_layer_mode_process (GeglOperation       *operation,
+                                   void                *in,
+                                   void                *layer,
+                                   void                *mask,
+                                   void                *out,
+                                   glong                samples,
+                                   const GeglRectangle *roi,
+                                   gint                 level)
+{
+  return ((GimpOperationLayerMode *) operation)->function (
+    operation, in, layer, mask, out, samples, roi, level);
+}
+
+static gboolean
+gimp_operation_layer_mode_real_parent_process (GeglOperation        *operation,
+                                               GeglOperationContext *context,
+                                               const gchar          *output_prop,
+                                               const GeglRectangle  *result,
+                                               gint                  level)
 {
   GimpOperationLayerMode   *point = GIMP_OPERATION_LAYER_MODE (operation);
   GObject                  *input;
@@ -569,20 +631,6 @@ gimp_operation_layer_mode_parent_process (GeglOperation        *operation,
                                                        level);
 }
 
-static gboolean
-gimp_operation_layer_mode_process (GeglOperation       *operation,
-                                   void                *in,
-                                   void                *layer,
-                                   void                *mask,
-                                   void                *out,
-                                   glong                samples,
-                                   const GeglRectangle *roi,
-                                   gint                 level)
-{
-  return ((GimpOperationLayerMode *) operation)->function (
-    operation, in, layer, mask, out, samples, roi, level);
-}
-
 static gboolean
 gimp_operation_layer_mode_real_process (GeglOperation       *operation,
                                         void                *in_p,
@@ -601,7 +649,7 @@ gimp_operation_layer_mode_real_process (GeglOperation       *operation,
   gfloat                  opacity                 = layer_mode->opacity;
   GimpLayerColorSpace     blend_space             = layer_mode->blend_space;
   GimpLayerColorSpace     composite_space         = layer_mode->composite_space;
-  GimpLayerCompositeMode  composite_mode          = layer_mode->real_composite_mode;
+  GimpLayerCompositeMode  composite_mode          = layer_mode->composite_mode;
   GimpLayerModeBlendFunc  blend_function          = layer_mode->blend_function;
   gboolean                composite_needs_in_color;
   gfloat                 *blend_in;
diff --git a/app/operations/layer-modes/gimpoperationlayermode.h 
b/app/operations/layer-modes/gimpoperationlayermode.h
index 851daae3ae..b0327d312f 100644
--- a/app/operations/layer-modes/gimpoperationlayermode.h
+++ b/app/operations/layer-modes/gimpoperationlayermode.h
@@ -47,10 +47,13 @@ struct _GimpOperationLayerMode
   const Babl                  *cached_fish_format;
   const Babl                  *space_fish[3 /* from */][3 /* to */];
 
-  GimpLayerCompositeMode       real_composite_mode;
+  gdouble                      prop_opacity;
+  GimpLayerCompositeMode       prop_composite_mode;
+
   GimpLayerModeFunc            function;
   GimpLayerModeBlendFunc       blend_function;
   gboolean                     is_last_node;
+  gboolean                     has_mask;
 };
 
 struct _GimpOperationLayerModeClass
@@ -58,6 +61,11 @@ struct _GimpOperationLayerModeClass
   GeglOperationPointComposer3Class  parent_class;
 
   /*  virtual functions  */
+  gboolean                 (* parent_process)      (GeglOperation          *operation,
+                                                    GeglOperationContext   *context,
+                                                    const gchar            *output_prop,
+                                                    const GeglRectangle    *result,
+                                                    gint                    level);
   gboolean                 (* process)             (GeglOperation          *operation,
                                                     void                   *in,
                                                     void                   *aux,
diff --git a/app/operations/layer-modes/gimpoperationmerge.c b/app/operations/layer-modes/gimpoperationmerge.c
index 7e28db3ac5..e1b25cad13 100644
--- a/app/operations/layer-modes/gimpoperationmerge.c
+++ b/app/operations/layer-modes/gimpoperationmerge.c
@@ -79,7 +79,7 @@ gimp_operation_merge_process (GeglOperation       *op,
   gfloat                  opacity    = layer_mode->opacity;
   const gboolean          has_mask   = mask != NULL;
 
-  switch (layer_mode->real_composite_mode)
+  switch (layer_mode->composite_mode)
     {
     case GIMP_LAYER_COMPOSITE_UNION:
     case GIMP_LAYER_COMPOSITE_AUTO:
diff --git a/app/operations/layer-modes/gimpoperationnormal-sse2.c 
b/app/operations/layer-modes/gimpoperationnormal-sse2.c
index 6fac783eaf..73e42ed75c 100644
--- a/app/operations/layer-modes/gimpoperationnormal-sse2.c
+++ b/app/operations/layer-modes/gimpoperationnormal-sse2.c
@@ -62,7 +62,7 @@ gimp_operation_normal_process_sse2 (GeglOperation       *op,
       const __v4sf one       = _mm_set1_ps (1.0f);
       const __v4sf v_opacity = _mm_set1_ps (opacity);
 
-      switch (layer_mode->real_composite_mode)
+      switch (layer_mode->composite_mode)
         {
         case GIMP_LAYER_COMPOSITE_UNION:
         case GIMP_LAYER_COMPOSITE_AUTO:
diff --git a/app/operations/layer-modes/gimpoperationnormal-sse4.c 
b/app/operations/layer-modes/gimpoperationnormal-sse4.c
index c7fc580699..ba621a261e 100644
--- a/app/operations/layer-modes/gimpoperationnormal-sse4.c
+++ b/app/operations/layer-modes/gimpoperationnormal-sse4.c
@@ -62,7 +62,7 @@ gimp_operation_normal_process_sse4 (GeglOperation       *op,
       const __v4sf one       = _mm_set1_ps (1.0f);
       const __v4sf v_opacity = _mm_set1_ps (opacity);
 
-      switch (layer_mode->real_composite_mode)
+      switch (layer_mode->composite_mode)
         {
         case GIMP_LAYER_COMPOSITE_UNION:
         case GIMP_LAYER_COMPOSITE_AUTO:
diff --git a/app/operations/layer-modes/gimpoperationnormal.c 
b/app/operations/layer-modes/gimpoperationnormal.c
index 9726017ed1..9bd87052fc 100644
--- a/app/operations/layer-modes/gimpoperationnormal.c
+++ b/app/operations/layer-modes/gimpoperationnormal.c
@@ -100,7 +100,7 @@ gimp_operation_normal_process (GeglOperation       *op,
   gfloat                  opacity    = layer_mode->opacity;
   const gboolean          has_mask   = mask != NULL;
 
-  switch (layer_mode->real_composite_mode)
+  switch (layer_mode->composite_mode)
     {
     case GIMP_LAYER_COMPOSITE_UNION:
     case GIMP_LAYER_COMPOSITE_AUTO:
diff --git a/app/operations/layer-modes/gimpoperationreplace.c 
b/app/operations/layer-modes/gimpoperationreplace.c
index ca53f4957e..ed1ac19249 100644
--- a/app/operations/layer-modes/gimpoperationreplace.c
+++ b/app/operations/layer-modes/gimpoperationreplace.c
@@ -31,12 +31,12 @@
 
 
 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,
@@ -66,8 +66,8 @@ gimp_operation_replace_class_init (GimpOperationReplaceClass *klass)
                                  NULL);
 
   operation_class->get_bounding_box     = gimp_operation_replace_get_bounding_box;
-  operation_class->process              = gimp_operation_replace_parent_process;
 
+  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;
 }
@@ -114,9 +114,9 @@ gimp_operation_replace_get_bounding_box (GeglOperation *op)
                                                              self->composite_mode);
     }
 
-  if (self->opacity == 0.0)
+  if (self->prop_opacity == 0.0)
     included_region &= ~GIMP_LAYER_COMPOSITE_REGION_SOURCE;
-  else if (self->opacity == 1.0 && ! aux2_rect)
+  else if (self->prop_opacity == 1.0 && ! aux2_rect)
     included_region &= ~GIMP_LAYER_COMPOSITE_REGION_DESTINATION;
 
   gegl_rectangle_intersect (&result, &src_rect, &dst_rect);
@@ -141,13 +141,13 @@ gimp_operation_replace_parent_process (GeglOperation        *op,
   GimpLayerCompositeRegion  included_region;
 
   included_region = gimp_layer_mode_get_included_region
-    (layer_mode->layer_mode, layer_mode->real_composite_mode);
+    (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                            &&
+  if (layer_mode->opacity == 1.0                       &&
       ! gegl_operation_context_get_object (context, "aux2") &&
       (included_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE))
     {
@@ -215,8 +215,8 @@ gimp_operation_replace_parent_process (GeglOperation        *op,
         }
     }
 
-  return GEGL_OPERATION_CLASS (parent_class)->process (op, context, output_prop,
-                                                       result, level);
+  return GIMP_OPERATION_LAYER_MODE_CLASS (parent_class)->parent_process (
+    op, context, output_prop, result, level);
 }
 
 static gboolean
@@ -237,7 +237,7 @@ gimp_operation_replace_process (GeglOperation       *op,
   gfloat                  opacity    = layer_mode->opacity;
   const gboolean          has_mask   = mask != NULL;
 
-  switch (layer_mode->real_composite_mode)
+  switch (layer_mode->composite_mode)
     {
     case GIMP_LAYER_COMPOSITE_UNION:
     case GIMP_LAYER_COMPOSITE_AUTO:
@@ -336,7 +336,7 @@ gimp_operation_replace_get_affected_region (GimpOperationLayerMode *layer_mode)
 {
   GimpLayerCompositeRegion affected_region = GIMP_LAYER_COMPOSITE_REGION_INTERSECTION;
 
-  if (layer_mode->opacity != 0.0)
+  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
diff --git a/app/operations/layer-modes/gimpoperationsplit.c b/app/operations/layer-modes/gimpoperationsplit.c
index 53a340344d..fe83d3f8fb 100644
--- a/app/operations/layer-modes/gimpoperationsplit.c
+++ b/app/operations/layer-modes/gimpoperationsplit.c
@@ -79,7 +79,7 @@ gimp_operation_split_process (GeglOperation       *op,
   gfloat                  opacity    = layer_mode->opacity;
   const gboolean          has_mask   = mask != NULL;
 
-  switch (layer_mode->real_composite_mode)
+  switch (layer_mode->composite_mode)
     {
     case GIMP_LAYER_COMPOSITE_UNION:
       while (samples--)
diff --git a/app/paint/gimppaintcore-loops.cc b/app/paint/gimppaintcore-loops.cc
index 973bb550c5..4e2686853b 100644
--- a/app/paint/gimppaintcore-loops.cc
+++ b/app/paint/gimppaintcore-loops.cc
@@ -1883,14 +1883,13 @@ struct DoLayerBlend : Base
   DoLayerBlend (const GimpPaintCoreLoopsParams *params) :
     Base (params)
   {
-    layer_mode.layer_mode          = params->paint_mode;
-    layer_mode.opacity             = params->image_opacity;
-    layer_mode.function            = gimp_layer_mode_get_function (params->paint_mode);
-    layer_mode.blend_function      = gimp_layer_mode_get_blend_function (params->paint_mode);
-    layer_mode.blend_space         = gimp_layer_mode_get_blend_space (params->paint_mode);
-    layer_mode.composite_space     = gimp_layer_mode_get_composite_space (params->paint_mode);
-    layer_mode.composite_mode      = gimp_layer_mode_get_paint_composite_mode (params->paint_mode);
-    layer_mode.real_composite_mode = layer_mode.composite_mode;
+    layer_mode.layer_mode      = params->paint_mode;
+    layer_mode.opacity         = params->image_opacity;
+    layer_mode.function        = gimp_layer_mode_get_function (params->paint_mode);
+    layer_mode.blend_function  = gimp_layer_mode_get_blend_function (params->paint_mode);
+    layer_mode.blend_space     = gimp_layer_mode_get_blend_space (params->paint_mode);
+    layer_mode.composite_space = gimp_layer_mode_get_composite_space (params->paint_mode);
+    layer_mode.composite_mode  = gimp_layer_mode_get_paint_composite_mode (params->paint_mode);
 
     iterator_format = gimp_layer_mode_get_format (params->paint_mode,
                                                   layer_mode.blend_space,


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