[gimp/blend-tool-fun: 153/163] Bug 665187 - Fuzzy Select by Alpha

[Michael Henning <mhenning src gnome org>]

commit 5307901cd66c666449369f0cc933af25f3defdeb
Author: David Gowers <finticemo gmail com>
Date:   Sat Oct 17 13:49:23 2015 +1030

    Bug 665187 - Fuzzy Select by Alpha
    
    Implement 'Alpha' criterion for selection tools

 app/core/gimppickable-contiguous-region.c |    5 +++++
 libgimpbase/gimpbaseenums.c               |    2 ++
 libgimpbase/gimpbaseenums.h               |    3 ++-
 tools/pdbgen/enums.pl                     |    6 ++++--
 4 files changed, 13 insertions(+), 3 deletions(-)
---
diff --git a/app/core/gimppickable-contiguous-region.c b/app/core/gimppickable-contiguous-region.c
index 9b9d3db..b623d6a 100644
--- a/app/core/gimppickable-contiguous-region.c
+++ b/app/core/gimppickable-contiguous-region.c
@@ -259,6 +259,7 @@ choose_format (GeglBuffer          *buffer,
     case GIMP_SELECT_CRITERION_R:
     case GIMP_SELECT_CRITERION_G:
     case GIMP_SELECT_CRITERION_B:
+    case GIMP_SELECT_CRITERION_A:
       format = babl_format ("R'G'B'A float");
       break;
 
@@ -329,6 +330,10 @@ pixel_difference (const gfloat        *col1,
           max = fabs (col1[2] - col2[2]);
           break;
 
+        case GIMP_SELECT_CRITERION_A:
+          max = fabs (col1[3] - col2[3]);
+          break;
+
         case GIMP_SELECT_CRITERION_H:
           {
             /* wrap around candidates for the actual distance */
diff --git a/libgimpbase/gimpbaseenums.c b/libgimpbase/gimpbaseenums.c
index 8b25d55..5413524 100644
--- a/libgimpbase/gimpbaseenums.c
+++ b/libgimpbase/gimpbaseenums.c
@@ -1468,6 +1468,7 @@ gimp_select_criterion_get_type (void)
     { GIMP_SELECT_CRITERION_H, "GIMP_SELECT_CRITERION_H", "h" },
     { GIMP_SELECT_CRITERION_S, "GIMP_SELECT_CRITERION_S", "s" },
     { GIMP_SELECT_CRITERION_V, "GIMP_SELECT_CRITERION_V", "v" },
+    { GIMP_SELECT_CRITERION_A, "GIMP_SELECT_CRITERION_A", "a" },
     { 0, NULL, NULL }
   };
 
@@ -1480,6 +1481,7 @@ gimp_select_criterion_get_type (void)
     { GIMP_SELECT_CRITERION_H, NC_("select-criterion", "Hue"), NULL },
     { GIMP_SELECT_CRITERION_S, NC_("select-criterion", "Saturation"), NULL },
     { GIMP_SELECT_CRITERION_V, NC_("select-criterion", "Value"), NULL },
+    { GIMP_SELECT_CRITERION_A, NC_("select-criterion", "Alpha"), NULL },
     { 0, NULL, NULL }
   };
 
diff --git a/libgimpbase/gimpbaseenums.h b/libgimpbase/gimpbaseenums.h
index 60e51b8..a7c304b 100644
--- a/libgimpbase/gimpbaseenums.h
+++ b/libgimpbase/gimpbaseenums.h
@@ -667,7 +667,8 @@ typedef enum
   GIMP_SELECT_CRITERION_B,          /*< desc="Blue"       >*/
   GIMP_SELECT_CRITERION_H,          /*< desc="Hue"        >*/
   GIMP_SELECT_CRITERION_S,          /*< desc="Saturation" >*/
-  GIMP_SELECT_CRITERION_V           /*< desc="Value"      >*/
+  GIMP_SELECT_CRITERION_V,          /*< desc="Value"      >*/
+  GIMP_SELECT_CRITERION_A           /*< desc="Alpha"      >*/
 } GimpSelectCriterion;
 
 
diff --git a/tools/pdbgen/enums.pl b/tools/pdbgen/enums.pl
index b5d39e2..65ec99d 100644
--- a/tools/pdbgen/enums.pl
+++ b/tools/pdbgen/enums.pl
@@ -482,14 +482,16 @@ package Gimp::CodeGen::enums;
          symbols => [ qw(GIMP_SELECT_CRITERION_COMPOSITE
                          GIMP_SELECT_CRITERION_R GIMP_SELECT_CRITERION_G
                          GIMP_SELECT_CRITERION_B GIMP_SELECT_CRITERION_H
-                         GIMP_SELECT_CRITERION_S GIMP_SELECT_CRITERION_V) ],
+                         GIMP_SELECT_CRITERION_S GIMP_SELECT_CRITERION_V
+                         GIMP_SELECT_CRITERION_A) ],
          mapping => { GIMP_SELECT_CRITERION_COMPOSITE => '0',
                       GIMP_SELECT_CRITERION_R => '1',
                       GIMP_SELECT_CRITERION_G => '2',
                       GIMP_SELECT_CRITERION_B => '3',
                       GIMP_SELECT_CRITERION_H => '4',
                       GIMP_SELECT_CRITERION_S => '5',
-                      GIMP_SELECT_CRITERION_V => '6' }
+                      GIMP_SELECT_CRITERION_V => '6',
+                      GIMP_SELECT_CRITERION_A => '7' }
        },
     GimpSizeType =>
        { contig => 1,