feat(eui-neo): add 0.6.2 (#625)

CORE_SOURCES and VULKAN_SOURCES are byte-identical to 0.6.1 (extracted and
diffed from both CMakeLists.txt), so the lib's source list, deps, features
and flags carry over unchanged. The release is SDL2 single-finger touch
input, pixel-granular ScrollEvent::pixelX/pixelY, Markdown viewport-only
builds and text-rendering memory work.

The one descriptor-relevant change: upstream fixed 0.6.1's
sendX11MoveResizeForWindow guard break (the SDL2 branch's definition is now
hoisted OUT of the SDL_VIDEO_DRIVER_X11 guard, verified by diffing
window_backend.cpp across the two tags), which collides with this index's
0.6.1 package-private stub on non-linux (redefinition, measured).
Version-gating the generated header is not expressible (the xpkg parser
accepts only literal strings in generated_files; a concatenated value fails
with "malformed mcpp segment"), so the stub became a FUNCTION TEMPLATE: on
0.6.1 non-linux it is the only candidate; on 0.6.2 the real non-template
definition wins the exact-match tie and the template goes unused. Verified
with g++ mini-repros modelling each tag's exact structure (both platform
shapes, plus a negative control), and by building/running every eui-neo
member against 0.6.2 (sdl2/vulkan/app-main/markdown/tray/window: test
result ok; the base member compiles+links 0.6.2 and only fails this
machine's pre-existing runtime-closure check, which 0.6.1 fails identically
-- stale subos libffi.so.7 vs the index's libffi 3.4.4).

sha256 verified twice (two fresh downloads). No CN mirror yet -- plain-
string GLOBAL url per SOP; members' pins raised 0.6.1 -> 0.6.2.

Author: FarnaHerry

.agents/docs/2026-10-30-bump-eui-neo-0.6.2-plan.md

@@ -0,0 +1,137 @@
+# Design doc: bump `compat.eui-neo` to 0.6.2
+
+Date: 2026-10-30
+
+Follow-up to `.agents/docs/2026-10-14-bump-eui-neo-0.6.1-plan.md` and commit `725ca5d` (0.6.1).
+Upstream released 0.6.2; this bumps the index from 0.6.1 to 0.6.2.
+
+## Source and version
+
+| | |
+|---|---|
+| Upstream | `https://github.com/sudoevolve/EUI-NEO` |
+| Version | `0.6.2` (latest release) |
+| Tarball | `archive/refs/tags/v0.6.2.tar.gz` |
+| sha256 | `189d97aadb044de653237e12ac97d6fa92f1a65952854e3db6211d360f4d4124` (computed twice — local download and a second fresh download, stable) |
+| Wrap dir | `EUI-NEO-0.6.2/` — absorbed by the existing `install()` hook (`normalise_layout`) |
+| CN mirror | **pending** — no `mcpp-res` write access on this machine; plain-string url fallback per SOP |
+| License | Apache-2.0 (unchanged) |
+
+## What changed upstream (0.6.1 → 0.6.2)
+
+Release notes: `docs/releases/v0.6.2.md` (SDL2 single-finger touch input,
+pixel-granular `ScrollEvent::pixelX/pixelY`, Markdown viewport-only builds,
+glyph-advance caching, on-demand glyph-atlas allocation, ~8 MB text-memory
+win, software-renderer TODO doc).
+
+- **`CORE_SOURCES` and `VULKAN_SOURCES` are byte-identical to 0.6.1**
+  (extracted and diffed from both `CMakeLists.txt`). No new files under
+  `core/`; the changed files are internals (`text.cpp/h`, `opengl_text.cpp`,
+  `vulkan_text.cpp`, input headers, `render_backend.h`, `dsl_runtime.h`,
+  runtime headers, `components/markdown.h`, `sdl2_app_main.cpp` + a new
+  `<unordered_map>` include) and app/test/doc material. The lib's source
+  list, deps, features and flags carry over unchanged.
+- `components/markdown.h` still guards its body on `EUI_HAS_MD4C` — the
+  `markdown` feature is unchanged.
+- `sdl2_app_main.cpp` (the `app-main-sdl2` feature TU) gains one STL include
+  only — no descriptor impact.
+- **The one descriptor-relevant change**: upstream fixed the 0.6.1
+  `sendX11MoveResizeForWindow` breakage this index worked around in
+  `mcpp_eui_backends.h`. In 0.6.1 the SDL2 branch's definition sat INSIDE
+  `#if __linux__ && !__ANDROID__ && defined(SDL_VIDEO_DRIVER_X11)` while
+  `beginWindowMove`/`beginWindowResize` called it unguarded; 0.6.2 moved the
+  `#endif` from below the definition to above it (verified by diffing
+  `core/window/window_backend.cpp` across the two extracted tags), so the
+  definition is now unguarded — with the X11 specifics still inside the
+  guard and an `#else return false` body, exactly like the GLFW branch.
+
+## The shim problem this creates
+
+The 0.6.1 workaround's non-linux arm is a package-private stub:
+
+```cpp
+namespace core::window {
+inline bool sendX11MoveResizeForWindow(void* window, int direction) { … }
+}
+```
+
+On 0.6.2 non-linux, upstream's now-unguarded real definition reaches the
+same TU → **redefinition** (measured: compile of the 0.6.2 member against
+the unmodified 0.6.1-era header fails). Version-gating the generated header
+from the descriptor is not expressible: the xpkg parser accepts only literal
+strings in `generated_files` — a concatenated Lua value fails with
+`malformed mcpp segment` (measured with a probe package on mcpp
+2026.10.1.2), so `pkginfo.version()` cannot select header content, and no
+per-version `mcpp` override exists in the schema.
+
+**Fix: the stub became a function template.**
+
+```cpp
+namespace core::window {
+template <typename W>
+inline bool sendX11MoveResizeForWindow(W* window, int direction) { … }
+}
+```
+
+- 0.6.1 non-linux: the definition is guard-hidden, the template is the only
+  candidate, the unguarded uses at :567/:571 resolve to it. Compiles and
+  links (weak inline symbol).
+- 0.6.2 non-linux: the real non-template definition precedes the uses; the
+  call is an exact-match tie between template (W deduces to void, `Handle`
+  is `void*` in the SDL2 branch) and non-template — non-template wins — and
+  the template goes unused. A template and a non-template of the same name
+  coexist, so there is no redefinition.
+- linux (both tags): the linux arm still defines `SDL_VIDEO_DRIVER_X11=1`
+  for the package's own TUs. On 0.6.1 that wakes the guard holding the real
+  definition (non-template wins over the template — fine). On 0.6.2 it wakes
+  the self-contained `X11ResourceApi` block (which self-includes
+  `<SDL_syswm.h>`/`<X11/Xresource.h>` inside the guard) and the guarded
+  branch of `sendX11MoveResizeForWindow`/`x11ContentScale`; runtime-safe
+  under compat.sdl2 (dummy+offscreen — no SDL window is ever an X11 window,
+   and `x11ResourceApi()` fails its `available()` check without libX11).
+
+Mechanism verified with g++ -std=c++17 mini-repros that model each tag's
+exact structure (guard-hidden vs unguarded definition), force-including the
+extracted shim header:
+
+- 0.6.1 shape, simulated non-linux (`-U__linux__`): compiles+links, template
+  emitted (`nm`: weak `sendX11MoveResizeForWindow<void>`), picked at runtime.
+- 0.6.2 shape, simulated non-linux: compiles+links, exit code proves the
+  real definition (returns true) won over the template (returns false).
+- 0.6.1 linux shape (macro woken): real in-guard definition wins, exit code
+  proves it.
+- Negative control: 0.6.1 shape WITHOUT the shim fails to compile
+  ('core' undeclared), matching the original 0.6.1 failure.
+
+## Version bumps
+
+- `pkgs/e/compat.eui-neo.lua`: 0.6.2 entries on linux/macosx/windows,
+  plain-string GLOBAL url (no CN mirror yet), plus the file-top version note.
+- Member pins `0.6.1` → `0.6.2` in all seven `tests/examples/eui-neo*`
+  members (the pins are floors; resolution picked 0.6.1 over 0.6.2 until
+  raised — same pattern as the 0.6.1 bump).
+
+## Local verification (mcpp 2026.10.29.1, xlings 2026.10.26.1)
+
+- `eui-neo-sdl2`, `eui-neo-vulkan`, `eui-neo-app-main`, `eui-neo-markdown`,
+  `eui-neo-tray`, `eui-neo-window`: **test result ok** (each builds
+  compat.eui-neo 0.6.2 and runs). The sdl2 member is the one that exercises
+  the reworked shim path on linux.
+- `eui-neo` (base member): compat.eui-neo 0.6.2 compiles and links (27
+  units), but the post-link runtime-closure check fails on this machine:
+  `libffi.so.8` is not on the artifact's search path. This is pre-existing
+  environment rot, not a 0.6.2 regression: the 0.6.1 build fails the same
+  check here (measured before the bump), the subos library view at
+  `~/.mcpp/registry/subos/default/lib` still carries `libffi.so.7` while the
+  index resolves `xim:libffi@3.4.4` (which ships `.so.8`), and
+  `xlings install/update xim:libffi` both report "already installed" without
+  repointing the view. CI's fresh containers are authoritative for the run.
+- `mcpp xpkg parse` on the descriptor: OK. Lint equivalents (mirror urls,
+  platform parity, duplicate versions) pass locally.
+
+## Notes
+
+- The `mcpp` segment stays version-independent; one header now serves every
+  published tag (0.5.3 through 0.6.2).
+- The 0.6.1-era comment block in the descriptor was updated, not removed —
+  the template trick only makes sense with the 0.6.1 history in view.

pkgs/e/compat.eui-neo.lua

@@ -17,7 +17,30 @@
 -- them as `"3rd/stb_image.h"` — except miniaudio, which audio.cpp includes
 -- BARE; see the 0.6.0 note below.
 --
--- The build recipe below tracks upstream `CMakeLists.txt` (v0.6.1): CORE_SOURCES
+-- 0.6.2: CORE_SOURCES and VULKAN_SOURCES are byte-identical to 0.6.1, so the
+-- lib's source list, deps, features and flags carry over unchanged. The
+-- release is touch input for the SDL2 backend (single-finger pointer events,
+-- pixel-granular ScrollEvent::pixelX/pixelY), Markdown viewport-only builds,
+-- glyph-advance caching and on-demand glyph-atlas allocation, plus upstream
+-- regression probes. It also UN-DOES the one descriptor-relevant break of
+-- 0.6.1: upstream hoisted the SDL2 branch's sendX11MoveResizeForWindow
+-- definition OUT of the `#if … && defined(SDL_VIDEO_DRIVER_X11)` guard (the
+-- `#endif` moved from below the definition to above it — compare
+-- core/window/window_backend.cpp across the two tags), giving the non-linux
+-- platforms a real definition with the `#else return false` body upstream's
+-- GLFW branch always had. That collides with the 0.6.1 package-private stub
+-- in mcpp_eui_backends.h (redefinition, measured on a 0.6.2 compile), so the
+-- stub became a FUNCTION TEMPLATE: on 0.6.1 non-linux it is still the only
+-- candidate and satisfies the unguarded uses; on 0.6.2 non-linux the real
+-- non-template definition is preferred by overload resolution (exact-match
+-- tie → non-template wins) and the template goes unused; a template and a
+-- non-template with the same name coexist, so there is no redefinition on
+-- either tag. Versions cannot gate descriptor content (the xpkg parser
+-- accepts only literal strings in generated_files — a concatenated value
+-- fails with "malformed mcpp segment", measured), so one header must serve
+-- every published version, and the template is what makes that possible.
+--
+-- The build recipe below tracks upstream `CMakeLists.txt` (v0.6.2): CORE_SOURCES
 -- plus the OpenGL backend and, for the glfw window backend, `ime_bridge.c`.
 -- 0.5.5 grew a Shadertoy subsystem: render_backend.h and include/eui/types.h now
 -- include core/render/shadertoy.h unconditionally, and opengl_backend.cpp calls
@@ -250,6 +273,14 @@ package = {
                 url    = "https://github.com/sudoevolve/EUI-NEO/archive/refs/tags/v0.6.1.tar.gz",
                 sha256 = "cd0bd6bd437177db097da146fc20f4b8b01c70d0db561a6f8e26baa26dbbbf5f",
             },
+            -- 0.6.2: CORE_SOURCES/VULKAN_SOURCES byte-identical to 0.6.1; the
+            -- mcpp_eui_backends.h stub is now a template so the header serves
+            -- both tags (see the file-top note). No CN mirror yet — plain-
+            -- string GLOBAL url, same as 0.6.1.
+            ["0.6.2"] = {
+                url    = "https://github.com/sudoevolve/EUI-NEO/archive/refs/tags/v0.6.2.tar.gz",
+                sha256 = "189d97aadb044de653237e12ac97d6fa92f1a65952854e3db6211d360f4d4124",
+            },
         },
         macosx = {
             ["0.5.3"] = {
@@ -302,6 +333,11 @@ package = {
                 url    = "https://github.com/sudoevolve/EUI-NEO/archive/refs/tags/v0.6.1.tar.gz",
                 sha256 = "cd0bd6bd437177db097da146fc20f4b8b01c70d0db561a6f8e26baa26dbbbf5f",
             },
+            -- 0.6.2: see the linux block — plain-string GLOBAL, no CN mirror.
+            ["0.6.2"] = {
+                url    = "https://github.com/sudoevolve/EUI-NEO/archive/refs/tags/v0.6.2.tar.gz",
+                sha256 = "189d97aadb044de653237e12ac97d6fa92f1a65952854e3db6211d360f4d4124",
+            },
         },
         windows = {
             ["0.5.3"] = {
@@ -354,6 +390,11 @@ package = {
                 url    = "https://github.com/sudoevolve/EUI-NEO/archive/refs/tags/v0.6.1.tar.gz",
                 sha256 = "cd0bd6bd437177db097da146fc20f4b8b01c70d0db561a6f8e26baa26dbbbf5f",
             },
+            -- 0.6.2: see the linux block — plain-string GLOBAL, no CN mirror.
+            ["0.6.2"] = {
+                url    = "https://github.com/sudoevolve/EUI-NEO/archive/refs/tags/v0.6.2.tar.gz",
+                sha256 = "189d97aadb044de653237e12ac97d6fa92f1a65952854e3db6211d360f4d4124",
+            },
         },
     },
 
@@ -433,23 +474,27 @@ package = {
  *
  * Both halves must NOT become interface defines — consumers would inherit
  * the lie on every platform (on macOS, SDL_syswm.h would then demand X11
- * headers consumers do not have). */
+ * headers consumers do not have).
+ *
+ * 0.6.2 note: upstream hoisted the guarded definition OUT of the macro
+ * guard (window_backend.cpp), so on 0.6.2 this branch's stub must not be a
+ * plain function — it would redefine the now-unguarded upstream one. It is
+ * a FUNCTION TEMPLATE instead: on 0.6.1 (definition still guard-hidden) it
+ * is the only candidate and satisfies the unguarded uses at :567/:571; on
+ * 0.6.2 the real non-template definition exists before those uses and wins
+ * the exact-match tie (non-template preferred), leaving the template
+ * unused. A template and a non-template of the same name coexist, so one
+ * header serves both tags. Handle is void* in the SDL2 branch
+ * (window_types.h), so W deduces to void with an exact match.
+ * Guarded by __cplusplus because mcpp_eui_backends.h is force-included
+ * into the package's C TUs (tray_bridge.c, native_bridge.c) as well as
+ * its C++ ones. */
 #  if defined(__linux__) && !defined(__ANDROID__)
 #    define SDL_VIDEO_DRIVER_X11 1
 #  elif defined(__cplusplus)
-/* macOS / Windows: `__linux__` is false, so no macro can wake the guarded
- * declaration — upstream's own CI builds the SDL2 backend on Linux only and
- * never sees it (measured on both CI legs: use of undeclared identifier at
- * :567/:571). Supply the fallback upstream's GLFW branch and its release
- * notes both describe — "on non-X11 platforms the delegation returns false
- * and callers keep their programmatic fallback" — as a core::window stub.
- * Handle is void* in the SDL2 branch (window_types.h), so the signature
- * matches exactly, and the later real definition cannot exist on this branch
- * of the #if (it is linux-only), so there is no redefinition. Guarded by
- * __cplusplus because mcpp_eui_backends.h is force-included into the package's
- * C TUs (tray_bridge.c, native_bridge.c) as well as its C++ ones. */
 namespace core::window {
-inline bool sendX11MoveResizeForWindow(void* window, int direction) {
+template <typename W>
+inline bool sendX11MoveResizeForWindow(W* window, int direction) {
     (void)window;
     (void)direction;
     return false;

tests/examples/eui-neo-app-main/mcpp.toml

@@ -30,4 +30,4 @@ name = "eui-neo-app-main-tests"
 version = "0.1.0"
 
 [dependencies.compat]
-eui-neo = { version = "0.6.1", features = ["app-main"] }
+eui-neo = { version = "0.6.2", features = ["app-main"] }

tests/examples/eui-neo-markdown/mcpp.toml

@@ -7,4 +7,4 @@ version = "0.1.0"
 # what switches components/markdown.h from its fallback to the real parser.
 
 [dependencies.compat]
-eui-neo = { version = "0.6.1", features = ["markdown"] }
+eui-neo = { version = "0.6.2", features = ["markdown"] }

tests/examples/eui-neo-sdl2/mcpp.toml

@@ -7,4 +7,4 @@ version = "0.1.0"
 # into a real libcurl-backed implementation. The render backend stays OpenGL,
 # unnamed — naming a feature no longer costs you the defaults.
 [dependencies.compat]
-eui-neo = { version = "0.6.1", features = ["sdl2", "network"] }
+eui-neo = { version = "0.6.2", features = ["sdl2", "network"] }

tests/examples/eui-neo-tray/mcpp.toml

@@ -25,4 +25,4 @@ name = "eui-neo-tray-tests"
 version = "0.1.0"
 
 [dependencies.compat]
-eui-neo = "0.6.1"
+eui-neo = "0.6.2"

tests/examples/eui-neo-vulkan/mcpp.toml

@@ -6,7 +6,7 @@ version = "0.1.0"
 # package resolves the exclusive choice in its own preprocessor from the
 # MCPP_FEATURE_* flags. The window backend stays GLFW, unnamed.
 [dependencies.compat]
-eui-neo = { version = "0.6.1", features = ["vulkan"] }
+eui-neo = { version = "0.6.2", features = ["vulkan"] }
 
 [build]
 cxxflags = ["-DHAVE_EUI_VULKAN=1"]

tests/examples/eui-neo-window/mcpp.toml

@@ -34,4 +34,4 @@ name = "eui-neo-window-tests"
 version = "0.1.0"
 
 [dependencies.compat]
-eui-neo = "0.6.1"
+eui-neo = "0.6.2"

tests/examples/eui-neo/mcpp.toml

@@ -3,4 +3,4 @@ name = "eui-neo-tests"
 version = "0.1.0"
 
 [dependencies.compat]
-eui-neo = "0.6.1"
+eui-neo = "0.6.2"