Fix for any aspect ratio in 3D Environments (#320)

* Add initial AnyAspectRatio support

* Remove some logic that didn't work

* Remove rogue back slash

* Remove more remnants

* Update UILayer.h

* Update some comments

* Remove WIP UI changes

* Fix diffs

* Remove UI resize call from `UpdateAspectRatio`

* handle merge conflict

* Update to C++ style static cast

* Fix syntax

3 files changed, 22 insertions, 8 deletions

diff --git a/Minecraft.Client/Windows64/Iggy/gdraw/gdraw_d3d1x_shared.inl b/Minecraft.Client/Windows64/Iggy/gdraw/gdraw_d3d1x_shared.inl
index e827cd82..df42488c 100644
--- a/Minecraft.Client/Windows64/Iggy/gdraw/gdraw_d3d1x_shared.inl
+++ b/Minecraft.Client/Windows64/Iggy/gdraw/gdraw_d3d1x_shared.inl
@@ -973,6 +973,9 @@ void gdraw_D3D1X_(SetRendertargetSize)(S32 w, S32 h)
 
 void gdraw_D3D1X_(SetTileOrigin)(ID3D1X(RenderTargetView) *main_rt, ID3D1X(DepthStencilView) *main_ds, ID3D1X(ShaderResourceView) *non_msaa_rt, S32 x, S32 y)
 {
+
+    if (!gdraw) return; // AAR - saftey check because windows calls resize early
+
    D3D1X_(RENDER_TARGET_VIEW_DESC) desc;
 
    if (gdraw->frame_done) {
diff --git a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
index 0f83fae5..61257b89 100644
--- a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
+++ b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
@@ -88,8 +88,7 @@ BOOL g_bWidescreen = TRUE;
 int g_iScreenWidth = 1920;
 int g_iScreenHeight = 1080;
 
-UINT g_ScreenWidth = 1920;
-UINT g_ScreenHeight = 1080;
+float g_iAspectRatio = static_cast<float>(g_iScreenWidth) / g_iScreenHeight;
 
 char g_Win64Username[17] = { 0 };
 wchar_t g_Win64UsernameW[17] = { 0 };
@@ -98,6 +97,14 @@ wchar_t g_Win64UsernameW[17] = { 0 };
 static bool g_isFullscreen = false;
 static WINDOWPLACEMENT g_wpPrev = { sizeof(g_wpPrev) };
 
+//--------------------------------------------------------------------------------------
+// Update the Aspect Ratio to support Any Aspect Ratio
+//--------------------------------------------------------------------------------------
+void UpdateAspectRatio(int width, int height)
+{
+	g_iAspectRatio = static_cast<float>(width) / height;
+}
+
 struct Win64LaunchOptions
 {
 	int screenMode;
@@ -468,6 +475,7 @@ ID3D11Texture2D*		g_pDepthStencilBuffer = NULL;
 //  WM_COMMAND	- process the application menu
 //  WM_PAINT	- Paint the main window
 //  WM_DESTROY	- post a quit message and return
+//  WM_SIZE		- handle resizing logic to support Any Aspect Ratio
 //
 //
 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
@@ -585,6 +593,11 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 			}
 		}
 		break;
+	case WM_SIZE:
+		{
+			UpdateAspectRatio(LOWORD(lParam), HIWORD(lParam));
+		}
+		break;
 	default:
 		return DefWindowProc(hWnd, message, wParam, lParam);
 	}
@@ -719,7 +732,7 @@ HRESULT InitDevice()
 //app.DebugPrintf("width: %d, height: %d\n", width, height);
 	width = g_iScreenWidth;
 	height = g_iScreenHeight;
-app.DebugPrintf("width: %d, height: %d\n", width, height);
+//app.DebugPrintf("width: %d, height: %d\n", width, height);
 
 	UINT createDeviceFlags = 0;
 #ifdef _DEBUG
diff --git a/Minecraft.Client/glWrapper.cpp b/Minecraft.Client/glWrapper.cpp
index 540271b9..a356e674 100644
--- a/Minecraft.Client/glWrapper.cpp
+++ b/Minecraft.Client/glWrapper.cpp
@@ -48,13 +48,11 @@ void glLoadIdentity()
 	RenderManager.MatrixSetIdentity();
 }
 
-extern int g_iScreenWidth;
-extern int g_iScreenHeight;
-
+// AAR - Use calculated aspect ratio to support dynamic resizing
+extern float g_iAspectRatio;
 void gluPerspective(float fovy, float aspect, float zNear, float zFar)
 {
-	float dynamicAspect = (float)g_iScreenWidth / (float)g_iScreenHeight;
-	RenderManager.MatrixPerspective(fovy, dynamicAspect, zNear, zFar);
+	RenderManager.MatrixPerspective(fovy, g_iAspectRatio, zNear, zFar);
 }
 
 void glOrtho(float left,float right,float bottom,float top,float zNear,float zFar)