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, 14 insertions, 14 deletions

diff --git a/src/common/timing.h b/src/common/timing.h
index a3c3c88..a0c6ef1 100644
--- a/src/common/timing.h
+++ b/src/common/timing.h
@@ -1,12 +1,12 @@
-#ifndef YASL_COMMON_TIMING_H
-#define YASL_COMMON_TIMING_H
+#ifndef YASL_PRIVATE_COMMON_TIMING_H
+#define YASL_PRIVATE_COMMON_TIMING_H
 
-#include "yasl/timing.h"
+#include "common/private_timing.h"
 #include <stdbool.h>
 
-#define YASL_REFRESH_DEFAULT_NS 16666666.0
+#define YASL_PRIVATE_REFRESH_DEFAULT_NS 16666666.0
 
-struct yasl_frame_clock {
+struct yasl_private_frame_clock {
     uint64_t last_present_ns;
     uint64_t resize_count;
     uint64_t resize_sum_ns;
@@ -14,15 +14,15 @@ struct yasl_frame_clock {
     long resize_minflt;
     uint64_t frame_time_ns;
     double refresh_ns;
-    enum yasl_timing_source source;
+    enum yasl_private_timing_source source;
 };
 
-uint64_t yasl_clock_extend_ms(uint32_t ms, uint64_t now_ns);
-void yasl_clock_presented(struct yasl_frame_clock *c, uint64_t now, bool sample);
-void yasl_clock_note_resize(struct yasl_frame_clock *c, uint64_t dt_ns);
-void yasl_clock_resize_stats(const struct yasl_frame_clock *c,
-                             struct yasl_resize_stats *out);
-uint64_t yasl_clock_next_present_ns(const struct yasl_frame_clock *c);
-uint64_t yasl_clock_frame_timestamp_ns(struct yasl_frame_clock *c, uint64_t now);
+uint64_t yasl_private_clock_extend_ms(uint32_t ms, uint64_t now_ns);
+void yasl_private_clock_presented(struct yasl_private_frame_clock *c, uint64_t now, bool sample);
+void yasl_private_clock_note_resize(struct yasl_private_frame_clock *c, uint64_t dt_ns);
+void yasl_private_clock_resize_stats(const struct yasl_private_frame_clock *c,
+                             struct yasl_private_resize_stats *out);
+uint64_t yasl_private_clock_next_present_ns(const struct yasl_private_frame_clock *c);
+uint64_t yasl_private_clock_frame_timestamp_ns(struct yasl_private_frame_clock *c, uint64_t now);
 
-#endif /* YASL_COMMON_TIMING_H */
+#endif /* YASL_PRIVATE_COMMON_TIMING_H */