test: Add basic heif loader check

test/images/Makefile

@@ -4,6 +4,7 @@
  TYPES += argb
  TYPES += bmp
  TYPES += ff
+ TYPES += heif
  TYPES += gif
  TYPES += ico
  TYPES += jpg
@@ -44,6 +45,9 @@ imgs_64:  $(ALL_64)
 %.gif: %.png
 	convert $< $@
 
+%.heif: %.png
+	heif-enc -o $@ $<
+
 %.ico: %.png
 	convert $< $@
 

test/test_load.cpp

@@ -21,6 +21,9 @@ static const char  *const pfxs[] = {
    "bmp",
    "ff",
    "gif",
+#ifdef BUILD_HEIF_LOADER
+   "heif",
+#endif
    "ico",
    "jpg.mp3",                   // id3
    "jpg",

test/test_load_2.cpp

@@ -34,6 +34,9 @@ static tii_t        tii[] = {
    { "icon-64.ff.xz",		1153555547 },
 #endif
    { "icon-64.gif",		4016720483 },
+#ifdef BUILD_HEIF_LOADER
+   { "icon-64.heif",		 174609659 },
+#endif
    { "icon-64.ico",		1153555547 },
    { "icon-64.ilbm",		1153555547 },
    { "icon-64.jpg",		4132154843 },