Simplify the public event and CPU API

Applications now need far less ceremony: hello.c is a 20-line loop that
handles REFRESH, CLOSE and QUIT and draws into the surface's own pixels.

- Fold GEOMETRY, STATE and FOCUS into one WINDOW event carrying size,
  scale and state; unchanged values send nothing.
- Guarantee REFRESH once a window has a size and after every resize,
  never at size zero.
- Merge DROP_HOVER into DROP with over/leave/data actions and give drag
  and drop actions enums.
- Keep event strings valid until the next wait and drop
  yasl_event_release; empty or failed waits report NONE.
- Replace copy-in presentation with a lent pixel buffer:
  yasl_cpu_pixels and yasl_cpu_present.
- Remove yasl_poll_event, yasl_cpu_read_pixels, unused event fields and
  comments that restated names.
- Wayland: resize floating windows in request_size instead of reporting
  it unsupported, and stop marking new GPU surfaces as Vulkan so
  yasl_vulkan_create_surface no longer fails with NATIVE_WINDOW_IN_USE.

Also includes the in-progress public API refactor that was uncommitted
in the tree (removal of the app/loop layer, new surface, GL and Vulkan
entry points).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 11 insertions, 11 deletions

diff --git a/tests/common/test_utf8.c b/tests/common/test_utf8.c
index 72f8904..58bfe9d 100644
--- a/tests/common/test_utf8.c
+++ b/tests/common/test_utf8.c
@@ -9,19 +9,19 @@ int main(void)
     for (int i = 1; i <= 255; i++) latin1[i - 1] = (char)i;
     latin1[255] = '\0';
     size_t len = 0, back_len = 0;
-    char *utf8 = yasl_utf8_from_latin1(latin1, 255, &len);
-    assert(utf8 && yasl_utf8_validate(utf8, len));
-    char *back = yasl_utf8_to_latin1(utf8, &back_len);
+    char *utf8 = yasl_private_utf8_from_latin1(latin1, 255, &len);
+    assert(utf8 && yasl_private_utf8_validate(utf8, len));
+    char *back = yasl_private_utf8_to_latin1(utf8, &back_len);
     assert(back && back_len == 255 && memcmp(back, latin1, 256) == 0);
     free(back);
     free(utf8);
-    assert(!yasl_utf8_to_latin1("😀", &len));
-    assert(!yasl_utf8_to_latin1("\xc3", &len));
-    assert(!yasl_utf8_validate("\xc3", 1));
-    assert(!yasl_utf8_validate("\xe2\x82", 2));
-    assert(!yasl_utf8_validate("\xf0\x9f\x98", 3));
-    assert(!yasl_utf8_validate("\xed\xa0\x80", 3)); /* Surrogate. */
-    assert(yasl_utf8_validate("😀", sizeof("😀") - 1));
-    assert(yasl_utf8_validate(NULL, 0));
+    assert(!yasl_private_utf8_to_latin1("😀", &len));
+    assert(!yasl_private_utf8_to_latin1("\xc3", &len));
+    assert(!yasl_private_utf8_validate("\xc3", 1));
+    assert(!yasl_private_utf8_validate("\xe2\x82", 2));
+    assert(!yasl_private_utf8_validate("\xf0\x9f\x98", 3));
+    assert(!yasl_private_utf8_validate("\xed\xa0\x80", 3)); /* Surrogate. */
+    assert(yasl_private_utf8_validate("😀", sizeof("😀") - 1));
+    assert(yasl_private_utf8_validate(NULL, 0));
     return 0;
 }