babl: add babl_model_is, utility function for checking model equivalence

This creates an on the fly model with the same space as the one compared with
and does pointer equivalence. Using it makes for less verbose code.

diff --git a/babl/babl.c b/babl/babl.c
index c734fb3c0d46a74e95dfaad9f7ed6ef0e94a1bf2..3d7573ef362c0365a17f3a11cd9b007f9c215178 100644 (file)
--- a/babl/babl.c
+++ b/babl/babl.c
@@ -180,3 +180,11 @@ babl_exit (void)
 #endif
     }
 }
+
+#undef babl_model_is
+
+int babl_model_is (const Babl *babl, const char *model)
+{
+  return ((babl)==babl_model_with_space(model, babl));
+}
+

diff --git a/babl/babl.h b/babl/babl.h
index 660138f72d01bceb01974cf56ffbee8d2f1d1ca2..f0dc85221758923c395ca5380d8e390758d0bd19 100644 (file)
--- a/babl/babl.h
+++ b/babl/babl.h
@@ -501,6 +501,9 @@ const Babl * babl_trc (const char *name);
  * query thechromaticities of white point and primaries as well as trcs
  * used for r g a nd b, all arguments mights be NULL.
  */
+int babl_model_is (const Babl *babl, const char *model);
+
+#define babl_model_is(babl,model)  ((babl)==babl_model_with_space(model,babl))
 
 void babl_space_get (const Babl *space,
                      double *xw, double *yw,

diff --git a/export-symbols b/export-symbols
index f9d0a1cf906a5aed7a053bcb67e18cc8ab3d3d2c..130f616a8864e6bc5e191bc8aee191ee5514c6f7 100644 (file)
--- a/export-symbols
+++ b/export-symbols
@@ -31,6 +31,7 @@ babl_init
 babl_introspect
 babl_malloc
 babl_model
+babl_model_is
 babl_model_with_space
 babl_model_new
 babl_new_palette