Added control interface

apps/LoopThroughWithOpenGLCompositing/LoopThroughWithOpenGLCompositing.cpp

@@ -46,6 +46,10 @@
 #include "resource.h"
 #include "OpenGLComposite.h"
 
+#include <algorithm>
+#include <shellapi.h>
+#include <string>
+
 #ifndef WGL_CONTEXT_MAJOR_VERSION_ARB
 #define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
 #endif
@@ -65,6 +69,140 @@
 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
 typedef HGLRC (WINAPI* PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC hdc, HGLRC hShareContext, const int* attribList);
 
+namespace
+{
+const int kStatusStripHeight = 92;
+const int kStatusPadding = 8;
+const int kStatusLabelWidth = 58;
+const int kStatusButtonWidth = 86;
+const int kStatusRowHeight = 24;
+const int kStatusGap = 6;
+const UINT kCreateStatusStripMessage = WM_APP + 1;
+
+enum StatusControlId
+{
+	kControlUrlEditId = 2001,
+	kDocsUrlEditId = 2002,
+	kOscAddressEditId = 2003,
+	kOpenControlButtonId = 2004,
+	kOpenDocsButtonId = 2005
+};
+
+struct StatusStripControls
+{
+	HWND panel = NULL;
+	HWND controlLabel = NULL;
+	HWND controlUrl = NULL;
+	HWND openControl = NULL;
+	HWND docsLabel = NULL;
+	HWND docsUrl = NULL;
+	HWND openDocs = NULL;
+	HWND oscLabel = NULL;
+	HWND oscAddress = NULL;
+};
+
+bool StatusStripCreated(const StatusStripControls& controls)
+{
+	return controls.panel != NULL;
+}
+
+HWND CreateStatusChild(HWND parent, const char* className, const char* text, DWORD style, int controlId)
+{
+	return CreateWindowExA(
+		0,
+		className,
+		text,
+		WS_CHILD | WS_VISIBLE | style,
+		0,
+		0,
+		0,
+		0,
+		parent,
+		reinterpret_cast<HMENU>(static_cast<INT_PTR>(controlId)),
+		reinterpret_cast<HINSTANCE>(GetWindowLongPtr(parent, GWLP_HINSTANCE)),
+		NULL);
+}
+
+void CreateStatusStrip(HWND hWnd, StatusStripControls& controls)
+{
+	controls.panel = CreateStatusChild(hWnd, "STATIC", "", SS_NOTIFY, 0);
+	controls.controlLabel = CreateStatusChild(hWnd, "STATIC", "Control", SS_LEFT, 0);
+	controls.controlUrl = CreateStatusChild(hWnd, "EDIT", "", ES_AUTOHSCROLL | ES_READONLY, kControlUrlEditId);
+	controls.openControl = CreateStatusChild(hWnd, "BUTTON", "Open", BS_PUSHBUTTON, kOpenControlButtonId);
+	controls.docsLabel = CreateStatusChild(hWnd, "STATIC", "Docs", SS_LEFT, 0);
+	controls.docsUrl = CreateStatusChild(hWnd, "EDIT", "", ES_AUTOHSCROLL | ES_READONLY, kDocsUrlEditId);
+	controls.openDocs = CreateStatusChild(hWnd, "BUTTON", "Open", BS_PUSHBUTTON, kOpenDocsButtonId);
+	controls.oscLabel = CreateStatusChild(hWnd, "STATIC", "OSC", SS_LEFT, 0);
+	controls.oscAddress = CreateStatusChild(hWnd, "EDIT", "", ES_AUTOHSCROLL | ES_READONLY, kOscAddressEditId);
+
+	HFONT guiFont = reinterpret_cast<HFONT>(GetStockObject(DEFAULT_GUI_FONT));
+	HWND children[] = {
+		controls.controlLabel,
+		controls.controlUrl,
+		controls.openControl,
+		controls.docsLabel,
+		controls.docsUrl,
+		controls.openDocs,
+		controls.oscLabel,
+		controls.oscAddress
+	};
+	for (HWND child : children)
+	{
+		if (child)
+			SendMessage(child, WM_SETFONT, reinterpret_cast<WPARAM>(guiFont), TRUE);
+	}
+
+	SetWindowTextA(controls.controlUrl, "Starting control server...");
+	SetWindowTextA(controls.docsUrl, "Starting API docs...");
+	SetWindowTextA(controls.oscAddress, "Starting OSC listener...");
+}
+
+void LayoutStatusStrip(HWND hWnd, const StatusStripControls& controls)
+{
+	RECT clientRect = {};
+	if (!GetClientRect(hWnd, &clientRect) || !controls.panel)
+		return;
+
+	const int clientWidth = static_cast<int>(clientRect.right - clientRect.left);
+	const int clientHeight = static_cast<int>(clientRect.bottom - clientRect.top);
+	const int panelTop = std::max(0, clientHeight - kStatusStripHeight);
+	MoveWindow(controls.panel, 0, panelTop, clientWidth, kStatusStripHeight, TRUE);
+
+	const int rowX = kStatusPadding;
+	const int editX = rowX + kStatusLabelWidth + kStatusGap;
+	const int buttonX = std::max(editX, clientWidth - kStatusPadding - kStatusButtonWidth);
+	const int editWidth = std::max(80, buttonX - editX - kStatusGap);
+	const int oscWidth = std::max(80, clientWidth - editX - kStatusPadding);
+	const int row1 = panelTop + kStatusPadding;
+	const int row2 = row1 + kStatusRowHeight + kStatusGap;
+	const int row3 = row2 + kStatusRowHeight + kStatusGap;
+
+	MoveWindow(controls.controlLabel, rowX, row1 + 3, kStatusLabelWidth, kStatusRowHeight, TRUE);
+	MoveWindow(controls.controlUrl, editX, row1, editWidth, kStatusRowHeight, TRUE);
+	MoveWindow(controls.openControl, buttonX, row1, kStatusButtonWidth, kStatusRowHeight, TRUE);
+	MoveWindow(controls.docsLabel, rowX, row2 + 3, kStatusLabelWidth, kStatusRowHeight, TRUE);
+	MoveWindow(controls.docsUrl, editX, row2, editWidth, kStatusRowHeight, TRUE);
+	MoveWindow(controls.openDocs, buttonX, row2, kStatusButtonWidth, kStatusRowHeight, TRUE);
+	MoveWindow(controls.oscLabel, rowX, row3 + 3, kStatusLabelWidth, kStatusRowHeight, TRUE);
+	MoveWindow(controls.oscAddress, editX, row3, oscWidth, kStatusRowHeight, TRUE);
+}
+
+void UpdateStatusStrip(const StatusStripControls& controls, const OpenGLComposite& composite)
+{
+	if (!StatusStripCreated(controls))
+		return;
+
+	SetWindowTextA(controls.controlUrl, composite.GetControlUrl().c_str());
+	SetWindowTextA(controls.docsUrl, composite.GetDocsUrl().c_str());
+	SetWindowTextA(controls.oscAddress, composite.GetOscAddress().c_str());
+}
+
+void OpenUrl(const char* url)
+{
+	ShellExecuteA(NULL, "open", url, NULL, NULL, SW_SHOWNORMAL);
+}
+}
+
 void ShowUnhandledExceptionMessage(const char* prefix)
 {
 	try
@@ -203,6 +341,7 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 	static HDC					hDC = NULL;					// Private GDI Device context
 	static OpenGLComposite*		pOpenGLComposite = NULL;
 	static bool					sInteractiveResize = false;
+	static StatusStripControls	sStatusStrip;
 
 	switch (message)
 	{
@@ -251,7 +390,10 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 			{
 				wglMakeCurrent( NULL, NULL );
 				if (pOpenGLComposite->Start())
+				{
+					PostMessage(hWnd, kCreateStatusStripMessage, 0, 0);
 					break;						// success
+				}
 				MessageBoxA(NULL, "The OpenGL/DeckLink runtime initialized, but playout failed to start. See the previous DeckLink start message for the failing call.", "Startup failed", MB_OK | MB_ICONERROR);
 			}
 			else
@@ -273,6 +415,18 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 			}
 		}
 
+		case kCreateStatusStripMessage:
+			if (pOpenGLComposite)
+			{
+				if (!StatusStripCreated(sStatusStrip))
+					CreateStatusStrip(hWnd, sStatusStrip);
+
+				UpdateStatusStrip(sStatusStrip, *pOpenGLComposite);
+				LayoutStatusStrip(hWnd, sStatusStrip);
+				InvalidateRect(hWnd, NULL, FALSE);
+			}
+			break;
+
 		case WM_DESTROY:
 			try
 			{
@@ -313,6 +467,8 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 		case WM_SIZE:
 			try
 			{
+				if (StatusStripCreated(sStatusStrip))
+					LayoutStatusStrip(hWnd, sStatusStrip);
 				if (pOpenGLComposite)
 					pOpenGLComposite->resizeGL(LOWORD(lParam), HIWORD(lParam));
 			}
@@ -361,6 +517,28 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 			}
 			break;
 
+		case WM_COMMAND:
+			switch (LOWORD(wParam))
+			{
+			case kOpenControlButtonId:
+				if (pOpenGLComposite)
+				{
+					std::string url = pOpenGLComposite->GetControlUrl();
+					OpenUrl(url.c_str());
+				}
+				break;
+			case kOpenDocsButtonId:
+				if (pOpenGLComposite)
+				{
+					std::string url = pOpenGLComposite->GetDocsUrl();
+					OpenUrl(url.c_str());
+				}
+				break;
+			default:
+				return DefWindowProc(hWnd, message, wParam, lParam);
+			}
+			break;
+
 		default:
 			return (DefWindowProc(hWnd, message, wParam, lParam));
 	}

apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.h

@@ -52,6 +52,11 @@ public:
 	bool ResetLayerParameters(const std::string& layerId, std::string& error);
 	bool SaveStackPreset(const std::string& presetName, std::string& error);
 	bool LoadStackPreset(const std::string& presetName, std::string& error);
+	unsigned short GetControlServerPort() const;
+	unsigned short GetOscPort() const;
+	std::string GetControlUrl() const;
+	std::string GetDocsUrl() const;
+	std::string GetOscAddress() const;
 
 	void resizeGL(WORD width, WORD height);
 	void paintGL();

apps/LoopThroughWithOpenGLCompositing/gl/OpenGLCompositeRuntimeControls.cpp

@@ -5,6 +5,31 @@ std::string OpenGLComposite::GetRuntimeStateJson() const
 	return mRuntimeHost ? mRuntimeHost->BuildStateJson() : "{}";
 }
 
+unsigned short OpenGLComposite::GetControlServerPort() const
+{
+	return mRuntimeHost ? mRuntimeHost->GetServerPort() : 0;
+}
+
+unsigned short OpenGLComposite::GetOscPort() const
+{
+	return mRuntimeHost ? mRuntimeHost->GetOscPort() : 0;
+}
+
+std::string OpenGLComposite::GetControlUrl() const
+{
+	return "http://127.0.0.1:" + std::to_string(GetControlServerPort()) + "/";
+}
+
+std::string OpenGLComposite::GetDocsUrl() const
+{
+	return "http://127.0.0.1:" + std::to_string(GetControlServerPort()) + "/docs";
+}
+
+std::string OpenGLComposite::GetOscAddress() const
+{
+	return "udp://127.0.0.1:" + std::to_string(GetOscPort()) + " /VideoShaderToys/{Layer}/{Parameter}";
+}
+
 bool OpenGLComposite::AddLayer(const std::string& shaderId, std::string& error)
 {
 	if (!mRuntimeHost->AddLayer(shaderId, error))