Fixes for multiple windows and example 22 (#2483)

examples/22-windows/windows.cpp

@@ -177,20 +177,6 @@ public:
 		{
 			entry::MouseState mouseState = m_state.m_mouse;
 
-			imguiBeginFrame(mouseState.m_mx
-				,  mouseState.m_my
-				, (mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT   : 0)
-				| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT  : 0)
-				| (mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
-				,  mouseState.m_mz
-				, uint16_t(m_width)
-				, uint16_t(m_height)
-				);
-
-			showExampleDialog(this);
-
-			imguiEndFrame();
-
 			if (isValid(m_state.m_handle) )
 			{
 				if (0 == m_state.m_handle.idx)
@@ -231,6 +217,20 @@ public:
 				}
 			}
 
+			imguiBeginFrame(mouseState.m_mx
+				,  mouseState.m_my
+				, (mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT   : 0)
+				| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT  : 0)
+				| (mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
+				,  mouseState.m_mz
+				, uint16_t(m_width)
+				, uint16_t(m_height)
+				);
+
+			showExampleDialog(this);
+
+			imguiEndFrame();
+
 			const bx::Vec3 at  = { 0.0f, 0.0f,   0.0f };
 			const bx::Vec3 eye = { 0.0f, 0.0f, -35.0f };
 

examples/common/entry/entry_windows.cpp

@@ -573,6 +573,8 @@ namespace entry
 							, (HINSTANCE)GetModuleHandle(NULL)
 							, 0
 							);
+
+						adjust(hwnd, msg->m_width, msg->m_height, true);
 						clear(hwnd);
 
 						m_hwnd[_wparam]  = hwnd;

src/bgfx.cpp

@@ -1406,7 +1406,7 @@ namespace bgfx
 		{
 			viewRemap[m_viewRemap[ii] ] = ViewId(ii);
 
-			View& view = s_ctx->m_view[ii];
+			View& view = m_view[ii];
 			Rect rect(0, 0, uint16_t(m_resolution.width), uint16_t(m_resolution.height) );
 
 			if (isValid(view.m_fbh) )

src/renderer_d3d12.cpp

@@ -1021,6 +1021,7 @@ namespace bgfx { namespace d3d12
 				m_resolution.width  = _init.resolution.width;
 				m_resolution.height = _init.resolution.height;
 
+				m_windows[0] = BGFX_INVALID_HANDLE;
 				m_numWindows = 1;
 
 #if BX_PLATFORM_WINDOWS