Scaffold experimental wgpu viewer backend

Adds src/ifcviewer-wgpu/ and src/ifcviewer-wgpu-minimal/ behind a new BUILD_BONSAIVIEWER_WGPU option (default OFF), gated independently of BUILD_BONSAIVIEWER. Stage 1 brings up a Qt window with a wgpu-native v29 surface (X11) and clears to the background colour — no rendering beyond that yet. Mirrors the lifecycle of the GL ViewportWindow so subsequent stages (vertex-pulling renderer, pick, cull, HiZ, overlay) slot in without restructuring the host. wgpu-native is fetched as a pre-built binary release via FetchContent; its .so SONAME is patched in at configure time so dependents get a clean DT_NEEDED. The X11 native handle is obtained via the public QNativeInterface::QX11Application API; Wayland and macOS/Windows surface creation are stubbed with explicit "not wired yet" warnings. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-09-12 22:43:41 +00:00 · 2026-05-27 12:23:23 +10:00
parent dd902bf0f8
commit 19a39a0413
6 changed files with 702 additions and 0 deletions
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+/********************************************************************************
+ *                                                                              *
+ * This file is part of IfcOpenShell.                                           *
+ *                                                                              *
+ * IfcOpenShell is free software: you can redistribute it and/or modify         *
+ * it under the terms of the Lesser GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3.0 of the License, or          *
+ * (at your option) any later version.                                          *
+ *                                                                              *
+ * IfcOpenShell is distributed in the hope that it will be useful,              *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                 *
+ * Lesser GNU General Public License for more details.                          *
+ *                                                                              *
+ * You should have received a copy of the Lesser GNU General Public License     *
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
+ *                                                                              *
+ ********************************************************************************/
+
+#ifndef WGPUVIEWPORTWINDOW_H
+#define WGPUVIEWPORTWINDOW_H
+
+#include <QWindow>
+#include <QColor>
+
+#include <webgpu/webgpu.h>
+
+// Stage-1 wgpu viewport: opens a native QWindow, brings up a wgpu instance/
+// adapter/device, configures a surface against the platform-native window
+// handle, and clears to background_color_ on every UpdateRequest.
+//
+// Mirrors the lifecycle shape of the GL ViewportWindow so subsequent stages
+// can grow this into a full IFC renderer without restructuring the host.
+class WgpuViewportWindow : public QWindow {
+    Q_OBJECT
+public:
+    explicit WgpuViewportWindow(QWindow* parent = nullptr);
+    ~WgpuViewportWindow();
+
+    void setBackgroundColor(const QColor& color);
+
+protected:
+    void exposeEvent(QExposeEvent* event) override;
+    void resizeEvent(QResizeEvent* event) override;
+    bool event(QEvent* event) override;
+
+private:
+    bool initWgpu();
+    bool createSurface();
+    void configureSurface(int width_px, int height_px);
+    void render();
+    void shutdown();
+
+    bool wgpu_initialized_ = false;
+    bool surface_configured_ = false;
+    int  configured_w_ = 0;
+    int  configured_h_ = 0;
+
+    WGPUInstance      instance_       = nullptr;
+    WGPUAdapter       adapter_        = nullptr;
+    WGPUDevice        device_         = nullptr;
+    WGPUQueue         queue_          = nullptr;
+    WGPUSurface       surface_        = nullptr;
+    WGPUTextureFormat surface_format_ = WGPUTextureFormat_Undefined;
+
+    QColor background_color_ = QColor("#202329");
+};
+
+#endif // WGPUVIEWPORTWINDOW_H