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ifcviewer-web: load user sidecars via a file-browse button (#46)

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Adds an "Open .ifcview…" button that opens the browser's native file
chooser. The picked file's bytes are written into MEMFS and a new
exported entry point, load_uploaded_model_c, reads them back via the
existing loadSidecarFromPath: it resetScene()s the current model
(replace, not append), loads the sidecar, and viewAll()s it. Geometry
becomes resident over subsequent frames through render()'s inline
driveStreamingLoads, same as the embedded sample.

Deliberately a file picker, not drag-drop: browser file drag-drop needs
an X11 drag source (a file manager) to drag *from*, which a minimal WM
(ratpoison) doesn't provide. The native chooser is WM-independent.

Exports _load_uploaded_model_c and the FS runtime method; URL/byte-range
fetch of remote models stays for #88.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-06-29 11:19:49 +10:00
parent d36d241da2
commit e3722cf243
3 changed files with 75 additions and 4 deletions
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src/ifcviewer-web/main_web.cpp
+26
View File
@@ -41,6 +41,10 @@ namespace {
// WebViewportHost selector below.
constexpr const char* kCanvasSelector = "#viewer-canvas";
// MEMFS path the file-browse handler writes the picked sidecar to, and
// that load_uploaded_model_c reads back. Must match shell.html.
constexpr const char* kUploadPath = "/uploads/model.ifcview";
struct AppState {
WebViewportHost host{ kCanvasSelector };
ViewportCore core{ &host };
@@ -152,6 +156,28 @@ extern "C" EMSCRIPTEN_KEEPALIVE void raf_tick_c(void* user) {
}
}
// Called from shell.html's file-browse handler after it has written the
// picked file's bytes into MEMFS at kUploadPath. Replaces whatever is
// currently loaded (the embedded sample on first use, or a prior upload)
// with the new sidecar and frames it. Geometry becomes resident over the
// next frames via render()'s inline driveStreamingLoads. Exported to JS
// via EXPORTED_FUNCTIONS in CMakeLists.txt.
extern "C" EMSCRIPTEN_KEEPALIVE void load_uploaded_model_c() {
if (!g_app || !g_app->ready) return;
// resetScene drops the previous model's GPU resources so a fresh load
// replaces rather than accumulates (loadSidecarFromPath appends).
g_app->core.resetScene();
const unsigned int mid = g_app->core.loadSidecarFromPath(kUploadPath);
if (mid == 0) {
Log::warn() << "ifcviewer-web: uploaded model load failed";
return;
}
g_app->core.viewAll();
g_app->host.requestFrame();
Log::info() << "ifcviewer-web: loaded uploaded model (id " << mid << ")";
}
int main(int /*argc*/, char** /*argv*/) {
Log::info() << "ifcviewer-web: starting";
g_app = new AppState();