From c34ea0f30d928856da17bfdef62725398787cc54 Mon Sep 17 00:00:00 2001
From: fallenoak <git@fallenoak.me>
Date: Mon, 6 Mar 2023 08:44:13 -0600
Subject: [PATCH] feat(gx): handle window messages in d3d backend

---
 src/gx/CGxDevice.hpp        |  1 +
 src/gx/Types.hpp            |  8 +++
 src/gx/d3d/CGxDeviceD3d.cpp | 98 +++++++++++++++++++++++++++++++++++++
 src/gx/d3d/CGxDeviceD3d.hpp |  1 +
 src/gx/gll/CGxDeviceGLL.hpp |  1 +
 5 files changed, 109 insertions(+)

diff --git a/src/gx/CGxDevice.hpp b/src/gx/CGxDevice.hpp
index 57d77d4..fa97609 100644
--- a/src/gx/CGxDevice.hpp
+++ b/src/gx/CGxDevice.hpp
@@ -99,6 +99,7 @@ class CGxDevice {
         virtual void ICursorCreate(const CGxFormat& format);
         virtual int32_t DeviceCreate(long (*)(void*, uint32_t, uint32_t, long), const CGxFormat&);
         virtual int32_t DeviceSetFormat(const CGxFormat&);
+        virtual void DeviceWM(EGxWM wm, uintptr_t param1, uintptr_t param2) = 0;
         virtual void CapsWindowSize(CRect&) = 0;
         virtual void CapsWindowSizeInScreenCoords(CRect& dst) = 0;
         virtual void ScenePresent(void);
diff --git a/src/gx/Types.hpp b/src/gx/Types.hpp
index d9d3ed9..f68aaea 100644
--- a/src/gx/Types.hpp
+++ b/src/gx/Types.hpp
@@ -308,6 +308,14 @@ enum EGxuDrawListCategory {
     GxuCat_2 = 2
 };
 
+enum EGxWM {
+    GxWM_Size = 0,
+    GxWM_DisplayChange = 1,
+    GxWM_Destroy = 2,
+    GxWM_SetFocus = 3,
+    GxWM_KillFocus = 4,
+};
+
 enum COLOR_FILE_FORMAT {
     COLOR_JPEG = 0,
     COLOR_PAL = 1,
diff --git a/src/gx/d3d/CGxDeviceD3d.cpp b/src/gx/d3d/CGxDeviceD3d.cpp
index ab0bfcd..149021d 100644
--- a/src/gx/d3d/CGxDeviceD3d.cpp
+++ b/src/gx/d3d/CGxDeviceD3d.cpp
@@ -72,6 +72,100 @@ void CGxDeviceD3d::IUnloadD3dLib(HINSTANCE& d3dLib, LPDIRECT3D9& d3d) {
 }
 
 LRESULT CGxDeviceD3d::WindowProcD3d(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
+    auto device = reinterpret_cast<CGxDeviceD3d*>(GetWindowLongPtr(hWnd, GWLP_USERDATA));
+
+    switch (uMsg) {
+    case WM_CREATE: {
+        auto lpcs = reinterpret_cast<LPCREATESTRUCT>(lParam);
+        SetWindowLongPtr(hWnd, GWLP_USERDATA, reinterpret_cast<LPARAM>(lpcs->lpCreateParams));
+
+        return 0;
+    }
+
+    case WM_DESTROY: {
+        device->DeviceWM(GxWM_Destroy, 0, 0);
+
+        return 0;
+    }
+
+    case WM_SIZE: {
+        CRect windowRect = {
+            0.0f,
+            0.0f,
+            static_cast<float>(HIWORD(lParam)),
+            static_cast<float>(LOWORD(lParam))
+        };
+
+        int32_t resizeType = 0;
+        if (wParam == SIZE_MINIMIZED) {
+            resizeType = 1;
+        } else if (wParam == SIZE_MAXHIDE) {
+            resizeType = 2;
+        }
+
+        device->DeviceWM(GxWM_Size, reinterpret_cast<uintptr_t>(&windowRect), resizeType);
+
+        break;
+    }
+
+    case WM_ACTIVATE: {
+        // TODO
+
+        break;
+    }
+
+    case WM_SETFOCUS: {
+        device->DeviceWM(GxWM_SetFocus, 0, 0);
+
+        return 0;
+    }
+
+    case WM_KILLFOCUS: {
+        device->DeviceWM(GxWM_KillFocus, 0, 0);
+
+        return 0;
+    }
+
+    case WM_PAINT: {
+        PAINTSTRUCT paint;
+        BeginPaint(hWnd, &paint);
+        EndPaint(hWnd, &paint);
+
+        return 0;
+    }
+
+    case WM_ERASEBKGND: {
+        return 0;
+    }
+
+    case WM_SETCURSOR: {
+        // TODO
+
+        return 1;
+    }
+
+    case WM_DISPLAYCHANGE: {
+        // TODO
+
+        break;
+    }
+
+    case WM_SYSCOMMAND: {
+        // TODO
+
+        break;
+    }
+
+    case WM_SIZING: {
+        // TODO
+
+        break;
+    }
+
+    default:
+        break;
+    }
+
     // TODO
 
     return DefWindowProc(hWnd, uMsg, wParam, lParam);
@@ -143,6 +237,10 @@ int32_t CGxDeviceD3d::DeviceSetFormat(const CGxFormat& format) {
     }
 }
 
+void CGxDeviceD3d::DeviceWM(EGxWM wm, uintptr_t param1, uintptr_t param2) {
+    // TODO
+}
+
 int32_t CGxDeviceD3d::ICreateD3d() {
     if (CGxDeviceD3d::ILoadD3dLib(this->m_d3dLib, this->m_d3d) && this->m_d3d->GetDeviceCaps(0, D3DDEVTYPE_HAL, &this->m_d3dCaps) >= S_OK) {
         if (this->m_desktopDisplayMode.Format != D3DFMT_UNKNOWN) {
diff --git a/src/gx/d3d/CGxDeviceD3d.hpp b/src/gx/d3d/CGxDeviceD3d.hpp
index a306b56..1bf587d 100644
--- a/src/gx/d3d/CGxDeviceD3d.hpp
+++ b/src/gx/d3d/CGxDeviceD3d.hpp
@@ -32,6 +32,7 @@ class CGxDeviceD3d : public CGxDevice {
     virtual void IRsSendToHw(EGxRenderState rs);
     virtual int32_t DeviceCreate(long (*windowProc)(void*, uint32_t, uint32_t, long), const CGxFormat& format);
     virtual int32_t DeviceSetFormat(const CGxFormat& format);
+    virtual void DeviceWM(EGxWM wm, uintptr_t param1, uintptr_t param2);
     virtual void CapsWindowSize(CRect& dst);
     virtual void CapsWindowSizeInScreenCoords(CRect& dst);
     virtual void PoolSizeSet(CGxPool* pool, uint32_t size);
diff --git a/src/gx/gll/CGxDeviceGLL.hpp b/src/gx/gll/CGxDeviceGLL.hpp
index 020adbc..8764418 100644
--- a/src/gx/gll/CGxDeviceGLL.hpp
+++ b/src/gx/gll/CGxDeviceGLL.hpp
@@ -31,6 +31,7 @@ class CGxDeviceGLL : public CGxDevice {
         virtual void IRsSendToHw(EGxRenderState);
         virtual int32_t DeviceCreate(long (*)(void*, uint32_t, uint32_t, long), const CGxFormat&);
         virtual int32_t DeviceSetFormat(const CGxFormat&);
+        virtual void DeviceWM(EGxWM wm, uintptr_t param1, uintptr_t param2) {};
         virtual void CapsWindowSize(CRect&);
         virtual void CapsWindowSizeInScreenCoords(CRect& dst);
         virtual void ScenePresent(void);