app, pdb: use gimp_babl_is_valid() in more places

Use gimp_babl_is_valid(), added in the previous commit, to validate
image-type/precision combinations in various functions.

(cherry picked from commit 49ca383fa4)

app/core/gimpimage-convert-indexed.c

@@ -143,6 +143,7 @@
 
 #include "core-types.h"
 
+#include "gegl/gimp-babl.h"
 #include "gegl/gimp-gegl-utils.h"
 
 #include "gimp.h"
@@ -767,6 +768,9 @@ gimp_image_convert_indexed (GimpImage               *image,
 
   g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
   g_return_val_if_fail (gimp_image_get_base_type (image) != GIMP_INDEXED, FALSE);
+  g_return_val_if_fail (gimp_babl_is_valid (GIMP_INDEXED,
+                                            gimp_image_get_precision (image)),
+                        FALSE);
   g_return_val_if_fail (custom_palette == NULL ||
                         GIMP_IS_PALETTE (custom_palette), FALSE);
   g_return_val_if_fail (custom_palette == NULL ||

app/core/gimpimage-convert-precision.c

@@ -67,8 +67,8 @@ gimp_image_convert_precision (GimpImage        *image,
 
   g_return_if_fail (GIMP_IS_IMAGE (image));
   g_return_if_fail (precision != gimp_image_get_precision (image));
-  g_return_if_fail (precision == GIMP_PRECISION_U8_GAMMA ||
+  g_return_if_fail (gimp_babl_is_valid (gimp_image_get_base_type (image),
-                    gimp_image_get_base_type (image) != GIMP_INDEXED);
+                                        precision));
   g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
 
   switch (precision)

app/core/gimpimage-convert-type.c

@@ -58,6 +58,9 @@ gimp_image_convert_type (GimpImage          *image,
   g_return_val_if_fail (GIMP_IS_IMAGE (image), FALSE);
   g_return_val_if_fail (new_type != gimp_image_get_base_type (image), FALSE);
   g_return_val_if_fail (new_type != GIMP_INDEXED, FALSE);
+  g_return_val_if_fail (gimp_babl_is_valid (new_type,
+                                            gimp_image_get_precision (image)),
+                        FALSE);
   g_return_val_if_fail (dest_profile == NULL || GIMP_IS_COLOR_PROFILE (dest_profile),
                         FALSE);
   g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), FALSE);

app/pdb/image-cmds.c

@@ -53,6 +53,7 @@
 #include "core/gimpselection.h"
 #include "core/gimptempbuf.h"
 #include "file/file-utils.h"
+#include "gegl/gimp-babl.h"
 #include "plug-in/gimpplugin-cleanup.h"
 #include "plug-in/gimpplugin.h"
 #include "plug-in/gimppluginmanager.h"
@@ -197,7 +198,7 @@ image_new_with_precision_invoker (GimpProcedure         *procedure,
       if (gimp->plug_in_manager->current_plug_in)
         gimp_plug_in_enable_precision (gimp->plug_in_manager->current_plug_in);
 
-      if (type != GIMP_INDEXED || precision == GIMP_PRECISION_U8_GAMMA)
+      if (gimp_babl_is_valid (type, precision))
         {
           image = gimp_create_image (gimp, width, height, type,
                                      precision, FALSE);

app/pdb/image-convert-cmds.c

@@ -35,6 +35,7 @@
 #include "core/gimpitemstack.h"
 #include "core/gimppalette.h"
 #include "core/gimpparamspecs.h"
+#include "gegl/gimp-babl.h"
 #include "plug-in/gimpplugin.h"
 #include "plug-in/gimppluginmanager.h"
 
@@ -62,7 +63,8 @@ image_convert_rgb_invoker (GimpProcedure         *procedure,
 
   if (success)
     {
-      if (gimp_pdb_image_is_not_base_type (image, GIMP_RGB, error))
+      if (gimp_pdb_image_is_not_base_type (image, GIMP_RGB, error) &&
+          gimp_babl_is_valid (GIMP_RGB, gimp_image_get_precision (image)))
         {
           success = gimp_image_convert_type (image, GIMP_RGB, NULL, NULL, error);
         }
@@ -91,7 +93,8 @@ image_convert_grayscale_invoker (GimpProcedure         *procedure,
 
   if (success)
     {
-      if (gimp_pdb_image_is_not_base_type (image, GIMP_GRAY, error))
+      if (gimp_pdb_image_is_not_base_type (image, GIMP_GRAY, error) &&
+          gimp_babl_is_valid (GIMP_GRAY, gimp_image_get_precision (image)))
         {
           success = gimp_image_convert_type (image, GIMP_GRAY, NULL, NULL, error);
         }
@@ -136,6 +139,7 @@ image_convert_indexed_invoker (GimpProcedure         *procedure,
 
       if (gimp_pdb_image_is_not_base_type (image, GIMP_INDEXED, error)        &&
           gimp_pdb_image_is_precision (image, GIMP_PRECISION_U8_GAMMA, error) &&
+          gimp_babl_is_valid (GIMP_INDEXED, gimp_image_get_precision (image)) &&
           gimp_item_stack_is_flat (GIMP_ITEM_STACK (gimp_image_get_layers (image))))
         {
           switch (palette_type)
@@ -242,7 +246,8 @@ image_convert_precision_invoker (GimpProcedure         *procedure,
         gimp_plug_in_enable_precision (gimp->plug_in_manager->current_plug_in);
 
       if (gimp_pdb_image_is_not_base_type (image, GIMP_INDEXED, error) &&
-          gimp_pdb_image_is_not_precision (image, precision, error))
+          gimp_pdb_image_is_not_precision (image, precision, error)    &&
+          gimp_babl_is_valid (gimp_image_get_base_type (image), precision))
         {
           gimp_image_convert_precision (image, precision,
                                         GEGL_DITHER_NONE,

pdb/groups/image.pdb

@@ -161,7 +161,7 @@ HELP
   if (gimp->plug_in_manager->current_plug_in)
     gimp_plug_in_enable_precision (gimp->plug_in_manager->current_plug_in);
 
-  if (type != GIMP_INDEXED || precision == GIMP_PRECISION_U8_GAMMA)
+  if (gimp_babl_is_valid (type, precision))
     {
       image = gimp_create_image (gimp, width, height, type,
                                  precision, FALSE);
@@ -3074,6 +3074,7 @@ CODE
 
 @headers = qw("libgimpmath/gimpmath.h"
               "libgimpbase/gimpbase.h"
+              "gegl/gimp-babl.h"
               "core/gimp.h"
               "core/gimpcontainer.h"
               "core/gimpimage-metadata.h"

pdb/groups/image_convert.pdb

@@ -35,7 +35,8 @@ HELP
     %invoke = (
 	code => <<'CODE'
 {
-  if (gimp_pdb_image_is_not_base_type (image, GIMP_RGB, error))
+  if (gimp_pdb_image_is_not_base_type (image, GIMP_RGB, error) &&
+      gimp_babl_is_valid (GIMP_RGB, gimp_image_get_precision (image)))
     {
       success = gimp_image_convert_type (image, GIMP_RGB, NULL, NULL, error);
     }
@@ -66,7 +67,8 @@ HELP
     %invoke = (
 	code => <<'CODE'
 {
-  if (gimp_pdb_image_is_not_base_type (image, GIMP_GRAY, error))
+  if (gimp_pdb_image_is_not_base_type (image, GIMP_GRAY, error) &&
+      gimp_babl_is_valid (GIMP_GRAY, gimp_image_get_precision (image)))
     {
       success = gimp_image_convert_type (image, GIMP_GRAY, NULL, NULL, error);
     }
@@ -128,6 +130,7 @@ HELP
 
   if (gimp_pdb_image_is_not_base_type (image, GIMP_INDEXED, error)        &&
       gimp_pdb_image_is_precision (image, GIMP_PRECISION_U8_GAMMA, error) &&
+      gimp_babl_is_valid (GIMP_INDEXED, gimp_image_get_precision (image)) &&
       gimp_item_stack_is_flat (GIMP_ITEM_STACK (gimp_image_get_layers (image))))
     {
       switch (palette_type)
@@ -240,7 +243,8 @@ HELP
     gimp_plug_in_enable_precision (gimp->plug_in_manager->current_plug_in);
 
   if (gimp_pdb_image_is_not_base_type (image, GIMP_INDEXED, error) &&
-      gimp_pdb_image_is_not_precision (image, precision, error))
+      gimp_pdb_image_is_not_precision (image, precision, error)    &&
+      gimp_babl_is_valid (gimp_image_get_base_type (image), precision))
     {
       gimp_image_convert_precision (image, precision,
                                     GEGL_DITHER_NONE,
@@ -257,7 +261,8 @@ CODE
     );
 }
 
-@headers = qw("core/gimp.h"
+@headers = qw("gegl/gimp-babl.h"
+              "core/gimp.h"
               "core/gimpimage.h"
               "core/gimpimage-convert-indexed.h"
               "core/gimpimage-convert-precision.h"