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, 20 insertions, 0 deletions

diff --git a/src/common/gl_options.h b/src/common/gl_options.h
new file mode 100644
index 0000000..eae38bb
--- /dev/null
+++ b/src/common/gl_options.h
@@ -0,0 +1,20 @@
+#ifndef YASL_PRIVATE_GL_OPTIONS_H
+#define YASL_PRIVATE_GL_OPTIONS_H
+#include <stdbool.h>
+/* Attribute values are shared with the public GL bridge; not installed. */
+enum {
+    YASL_PRIVATE_GL_END = 0, YASL_PRIVATE_GL_MAJOR = 1, YASL_PRIVATE_GL_MINOR,
+    YASL_PRIVATE_GL_PROFILE, YASL_PRIVATE_GL_DEBUG, YASL_PRIVATE_GL_FORWARD_COMPAT,
+    YASL_PRIVATE_GL_RED_BITS, YASL_PRIVATE_GL_GREEN_BITS, YASL_PRIVATE_GL_BLUE_BITS,
+    YASL_PRIVATE_GL_ALPHA_BITS, YASL_PRIVATE_GL_DEPTH_BITS, YASL_PRIVATE_GL_STENCIL_BITS,
+    YASL_PRIVATE_GL_SAMPLES, YASL_PRIVATE_GL_SRGB, YASL_PRIVATE_GL_API
+};
+enum { YASL_PRIVATE_GL_ANY = 0, YASL_PRIVATE_GL_CORE = 1, YASL_PRIVATE_GL_COMPATIBILITY = 2 };
+enum { YASL_PRIVATE_GL_OPENGL = 0, YASL_PRIVATE_GL_OPENGL_ES = 1 };
+struct yasl_private_gl_options {
+    int major, minor, profile, debug, forward_compat;
+    int red_bits, green_bits, blue_bits, alpha_bits, depth_bits, stencil_bits;
+    int samples, srgb, api;
+};
+bool yasl_private_gl_parse_options(const int *, struct yasl_private_gl_options *);
+#endif