Replace t[] array with individual references

src/composite.c

@@ -13,9 +13,6 @@ int Composite(VipsObject *context, VipsImage *src, VipsImage *dst, VipsImage **o
   if (src->Bands != 4 || dst->Bands != 4)
     return -1;
 
-  // These images will all be unreffed when context is unreffed:
-  VipsImage **t = (VipsImage **) vips_object_local_array(context, 3);
-
   // Extract RGB bands:
   VipsImage *srcRGB;
   VipsImage *dstRGB;
@@ -55,15 +52,19 @@ int Composite(VipsObject *context, VipsImage *src, VipsImage *dst, VipsImage **o
   //
   // out_a = src_a + dst_a * (1 - src_a)
   //                         ^^^^^^^^^^^
-  //                            t[0]
+  //                            t0
   //                 ^^^^^^^^^^^^^^^^^^^
-  //                        t[1]
+  //                         t1
+  VipsImage *t0;
+  VipsImage *t1;
   VipsImage *outAlphaNormalized;
-  if (vips_linear1(srcAlphaNormalized, &t[0], -1.0, 1.0, NULL) ||
-      vips_multiply(dstAlphaNormalized, t[0], &t[1], NULL) ||
-      vips_add(srcAlphaNormalized, t[1], &outAlphaNormalized, NULL))
+  if (vips_linear1(srcAlphaNormalized, &t0, -1.0, 1.0, NULL) ||
+      vips_multiply(dstAlphaNormalized, t0, &t1, NULL) ||
+      vips_add(srcAlphaNormalized, t1, &outAlphaNormalized, NULL))
     return -1;
 
+  vips_object_local(context, t0);
+  vips_object_local(context, t1);
   vips_object_local(context, outAlphaNormalized);
 
   //
@@ -113,12 +114,15 @@ int Composite(VipsObject *context, VipsImage *src, VipsImage *dst, VipsImage **o
   vips_object_local(context, outAlpha);
 
   // Combine RGB and alpha channel into output image:
-  if (vips_bandjoin2(outRGB, outAlpha, &t[2], NULL))
+  VipsImage *joined;
+  if (vips_bandjoin2(outRGB, outAlpha, &joined, NULL))
     return -1;
 
+  vips_object_local(context, joined);
+
   // Return a reference to the output image:
-  g_object_ref(t[2]);
-  *out = t[2];
+  g_object_ref(joined);
+  *out = joined;
 
   return 0;
 }