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, 5 insertions, 5 deletions

diff --git a/src/common/utf8.c b/src/common/utf8.c
index 78a5d8e..2fb737a 100644
--- a/src/common/utf8.c
+++ b/src/common/utf8.c
@@ -11,7 +11,7 @@
 #define unlikely(x) __builtin_expect(!!(x), 0)
 #endif
 
-bool yasl_utf8_validate(const char *str, size_t len)
+bool yasl_private_utf8_validate(const char *str, size_t len)
 {
     if (!str) return len == 0;
     const unsigned char *p = (const unsigned char *)str;
@@ -54,7 +54,7 @@ bool yasl_utf8_validate(const char *str, size_t len)
     return true;
 }
 
-char *yasl_utf8_from_latin1(const char *str, size_t len, size_t *out_len)
+char *yasl_private_utf8_from_latin1(const char *str, size_t len, size_t *out_len)
 {
     if (len > (SIZE_MAX - 1) / 2) return NULL;
     char *out = malloc(len * 2 + 1);
@@ -73,7 +73,7 @@ char *yasl_utf8_from_latin1(const char *str, size_t len, size_t *out_len)
     return out;
 }
 
-char *yasl_utf8_to_latin1(const char *str, size_t *out_len)
+char *yasl_private_utf8_to_latin1(const char *str, size_t *out_len)
 {
     char *out = malloc(strlen(str) + 1);
     if (!out) return NULL;
@@ -94,11 +94,11 @@ char *yasl_utf8_to_latin1(const char *str, size_t *out_len)
     return out;
 }
 
-char *yasl_utf8_sanitize_dup(const char *str)
+char *yasl_private_utf8_sanitize_dup(const char *str)
 {
     if (unlikely(!str)) return NULL;
     size_t len = strlen(str);
-    if (likely(yasl_utf8_validate(str, len))) {
+    if (likely(yasl_private_utf8_validate(str, len))) {
         char *out = malloc(len + 1);
         if (unlikely(!out)) return NULL;
         memcpy(out, str, len + 1);