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, 10 insertions, 10 deletions

diff --git a/src/common/input.h b/src/common/input.h
index 8980c55..d97ad17 100644
--- a/src/common/input.h
+++ b/src/common/input.h
@@ -1,27 +1,27 @@
-#ifndef YASL_INPUT_H
-#define YASL_INPUT_H
+#ifndef YASL_PRIVATE_INPUT_H
+#define YASL_PRIVATE_INPUT_H
 
-#include "yasl/yasl.h"
+#include "common/types.h"
 
 /* Each queued string and the last successfully polled string are owned here. */
 struct input_queue {
-    struct yasl_event *events;
+    struct yasl_private_event *events;
     size_t head, count, capacity;
     char *last_text;
     /* Last pointer position, for computing absolute-mode motion deltas. */
-    struct yasl_vector2i last_pos;
+    struct yasl_private_vector2i last_pos;
     bool has_last_pos;
-    /* Set by backends while YASL_POINTER_RELATIVE is active: keep pushed deltas. */
+    /* Set by backends while YASL_PRIVATE_POINTER_RELATIVE is active: keep pushed deltas. */
     bool relative;
     struct yasl_surface *reset_surface;
     bool reset_pending;
-    /* YASL_BUTTON_BIT() mask from pushed DOWN/UP events. */
+    /* YASL_PRIVATE_BUTTON_BIT() mask from pushed DOWN/UP events. */
     uint32_t buttons;
     /* Set by backends whose pointer leave ends any press: no release follows. */
     bool leave_ends_press;
     /* Installed by common code for display-wide publication. Standalone queues
      * retain their normal storage/pop semantics when publish is NULL. */
-    bool (*publish)(const struct yasl_event *ev, void *ud);
+    bool (*publish)(const struct yasl_private_event *ev, void *ud);
     void *publish_ud;
 };
 
@@ -29,8 +29,8 @@ struct input_queue {
  * POINTER_MOTION delta is computed from the previous position; otherwise the
  * backend-supplied delta is kept. Leave and reset clear the position history.
  * Pointer events get the held-button mask; reset clears it. */
-bool input_queue_push(struct input_queue *q, const struct yasl_event *ev);
-bool input_queue_pop(struct input_queue *q, struct yasl_event *ev);
+bool input_queue_push(struct input_queue *q, const struct yasl_private_event *ev);
+bool input_queue_pop(struct input_queue *q, struct yasl_private_event *ev);
 void input_queue_clear(struct input_queue *q);
 
 #endif