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, 38 insertions, 0 deletions

diff --git a/src/common/gl_options.c b/src/common/gl_options.c
new file mode 100644
index 0000000..ec8f98a
--- /dev/null
+++ b/src/common/gl_options.c
@@ -0,0 +1,38 @@
+#include "gl_options.h"
+#include <errno.h>
+#include <stddef.h>
+bool yasl_private_gl_parse_options(const int *attrs, struct yasl_private_gl_options *out)
+{
+    if (!out) { errno = EINVAL; return false; }
+    struct yasl_private_gl_options o = {.major=3, .minor=2, .profile=YASL_PRIVATE_GL_CORE,
+        .red_bits=8, .green_bits=8, .blue_bits=8, .alpha_bits=8, .depth_bits=24, .stencil_bits=8};
+    if (attrs) for (size_t i=0;;i+=2) {
+        if (i >= 128) { errno=EINVAL; return false; }
+        int key=attrs[i];
+        if (key==YASL_PRIVATE_GL_END) break;
+        int v=attrs[i+1];
+        switch(key) {
+        case YASL_PRIVATE_GL_MAJOR: o.major=v; break;
+        case YASL_PRIVATE_GL_MINOR: o.minor=v; break;
+        case YASL_PRIVATE_GL_PROFILE: o.profile=v; break;
+        case YASL_PRIVATE_GL_DEBUG: o.debug=v; break;
+        case YASL_PRIVATE_GL_FORWARD_COMPAT: o.forward_compat=v; break;
+        case YASL_PRIVATE_GL_RED_BITS: o.red_bits=v; break;
+        case YASL_PRIVATE_GL_GREEN_BITS: o.green_bits=v; break;
+        case YASL_PRIVATE_GL_BLUE_BITS: o.blue_bits=v; break;
+        case YASL_PRIVATE_GL_ALPHA_BITS: o.alpha_bits=v; break;
+        case YASL_PRIVATE_GL_DEPTH_BITS: o.depth_bits=v; break;
+        case YASL_PRIVATE_GL_STENCIL_BITS: o.stencil_bits=v; break;
+        case YASL_PRIVATE_GL_SAMPLES: o.samples=v; break;
+        case YASL_PRIVATE_GL_SRGB: o.srgb=v; break;
+        case YASL_PRIVATE_GL_API: o.api=v; break;
+        default: errno=EINVAL; return false;
+        }
+    }
+    if (o.major<1 || o.major>4 || o.minor<0 || o.minor>9 || o.profile<0 || o.profile>2 ||
+        o.api<0 || o.api>1 || (unsigned)o.debug>1 || (unsigned)o.forward_compat>1 ||
+        (unsigned)o.srgb>1 || (unsigned)o.red_bits>64 || (unsigned)o.green_bits>64 ||
+        (unsigned)o.blue_bits>64 || (unsigned)o.alpha_bits>64 || (unsigned)o.depth_bits>64 ||
+        (unsigned)o.stencil_bits>64 || (unsigned)o.samples>64) { errno=EINVAL; return false; }
+    *out=o; return true;
+}