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feat: report on-screen cursor position in producer contract

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Append cursor_seq/cursor_visible/cursor_pos to the producer block
(host-RO ABI; offsets 168/172/176, existing layout unchanged). Position
is reported every pump tick, independent of draw_cursor, so a consumer
can overlay its own cursor even when the producer does not composite it.

x and y pack into one 8-aligned 64-bit field (single atomic store, no
tear); cursor_seq bumps last to gate a consistent read. Adds the
vgpu_publish_cursor() engine setter and a lightweight cursor_sample_pos()
(position/visibility only, no shape extract) called from the pump.
This commit is contained in:
Gregory Lirent
2026-06-18 22:06:55 +03:00
parent 9f1b41cf78
commit 977c056287
6 changed files with 52 additions and 0 deletions
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src/stream/win32/cursor.c
+9
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@@ -105,6 +105,15 @@ int cursor_sample(vgpu_ctx* ctx) {
return changed;
}
void cursor_sample_pos(vgpu_ctx* ctx) {
vgpu_cursor_t* cur = &ctx->cursor;
CURSORINFO ci; ci.cbSize = sizeof ci;
if (!GetCursorInfo(&ci)) { cur->visible = 0; return; }
cur->visible = (ci.flags & CURSOR_SHOWING) != 0;
cur->x = ci.ptScreenPos.x;
cur->y = ci.ptScreenPos.y;
}
void cursor_draw(vgpu_ctx* ctx, uint8_t* dst, uint32_t W, uint32_t H) {
vgpu_cursor_t* cur = &ctx->cursor;
if (!cur->visible || cur->gw == 0) return;