gegl: enhancer presets + export, LSAN suppressions (wt0)

M9 (task wt0): GEGL quick-enhance (optional, feature-gated).

- src/enhancer.{c,h}: 8 built-in presets (Auto-fix, Brightness, Contrast,
  Saturation, Warm, Cool, Sharpen, Denoise) using gegl:stretch-contrast,
  gegl:exposure, gegl:brightness-contrast, gegl:saturation, gegl:color-enhance,
  gegl:unsharp-mask, gegl:noise-reduction. enhancer_apply via buffer-source +
  buffer-sink pipeline; enhancer_export via gegl:jpg-save. User graph presets
  deferred (NOT_SUPPORTED in v1).
- meson: gegl_dep conditional (-DHAVE_GEGL); enhancer.c in libggae.
- tests: unit test_enhancer (presets dims+non-zero, export file written).
  LSAN suppressions for GEGL third-party init/node leaks.
- 20/20 green, ASan clean (with GEGL lib suppressions).

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/meson.build b/tests/meson.build
index 4c1dfa5..d186207 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -143,6 +143,23 @@ test_runner = executable(
 )
 test('runner', test_runner, suite : 'unit', env : fixtures_env)
 
+if gegl_dep.found()
+   test_enhancer = executable(
+      'test_enhancer', ['test_enhancer.c', ggaze_conf_h],
+      include_directories : [inc, src_inc],
+      dependencies : [glib_dep, gegl_dep],
+      link_with : ggaze_lib, install : false,
+   )
+   enhancer_env = environment()
+   enhancer_env.set('GIO_USE_VFS', 'local')
+   enhancer_env.set('GGAZE_FIXTURES_DIR',
+      join_paths(meson.project_source_root(), 'tests', 'fixtures'))
+   enhancer_env.set('LSAN_OPTIONS',
+      'suppressions=' + join_paths(meson.project_source_root(), 'tests',
+                                  'lsan_suppressions.txt'))
+   test('enhancer', test_enhancer, suite : 'unit', env : enhancer_env)
+endif
+
 test_texturecache = executable(
    'test_texturecache',
    ['test_texturecache.c', ggaze_conf_h],