1 files changed, 506 insertions, 0 deletions
diff --git a/Runtime/GfxDevice/opengl/GLContext.cpp b/Runtime/GfxDevice/opengl/GLContext.cpp
new file mode 100644
index 0000000..047bc26
--- /dev/null
+++ b/Runtime/GfxDevice/opengl/GLContext.cpp
@@ -0,0 +1,506 @@
+#include "UnityPrefix.h"
+#include "GLContext.h"
+#include "Runtime/GfxDevice/GfxDevice.h"
+#include "Runtime/GfxDevice/GfxDeviceSetup.h"
+#include <set>
+#include "UnityGL.h"
+#include "Runtime/Misc/SystemInfo.h"
+#include "Runtime/Threads/Thread.h"
+#if UNITY_WIN
+#include "PlatformDependent/Win/WinUtils.h"
+#endif
+#if UNITY_OSX
+#if SUPPORT_AGL
+#include <AGL/agl.h>
+#endif
+#include <OpenGL/OpenGL.h>
+#include "Runtime/Graphics/ScreenManager.h"
+#elif UNITY_LINUX
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <GL/glx.h>
+#endif
+
+
+// define to 1 to print lots of context info
+#define DEBUG_GL_CONTEXT 0
+
+#if UNITY_OSX
+void CleanupMasterContextOSX (GraphicsContextGL* context); // GLContextOSX.cpp
+#endif
+
+
+static GraphicsContextHandle gMainGraphicsContext;
+static GraphicsContextHandle gMasterGraphicsContext;
+static GraphicsContexts gContexts;
+
+
+GraphicsContexts& GetGLContexts()
+{
+	return gContexts;
+}
+
+GraphicsContextHandle GetMainGraphicsContext() 
+{
+	return gMainGraphicsContext;
+}
+
+void SetMainGraphicsContext( GraphicsContextHandle context )
+{
+	Assert(context.IsValid());
+	gMainGraphicsContext = context;
+}
+
+GraphicsContextHandle GetMasterGraphicsContext()
+{
+	#if UNITY_WIN
+	Assert(gMasterGraphicsContext.IsValid());
+	#elif UNITY_OSX || UNITY_LINUX
+	if( !gMasterGraphicsContext.IsValid() )
+		MakeMasterGLContext();
+	#else
+	#error "Unknown platform"
+	#endif
+	
+	return gMasterGraphicsContext;
+}
+
+bool IsMasterGraphicsContextValid()
+{
+	return gMasterGraphicsContext.IsValid();
+}
+
+void PresentContextGL( GraphicsContextHandle contextHandle )
+{
+	AutoGfxDeviceAcquireThreadOwnership autoOwn;
+	if( !contextHandle.IsValid() )
+		return;
+	
+	GraphicsContextGL* context = OBJECT_FROM_HANDLE(contextHandle,GraphicsContextGL);
+	
+#if UNITY_WIN
+	BOOL ok = ::SwapBuffers( context->hdc );
+	if( !ok ) {
+		DWORD err = GetLastError();
+	}
+#elif UNITY_LINUX
+	if (gGraphicsCaps.gl.hasArbSync)
+	{
+		if (context->presentSync)
+		{
+			OGL_CALL(glClientWaitSync(static_cast<GLsync> (context->presentSync), 0, GL_TIMEOUT_IGNORED));
+			OGL_CALL(glDeleteSync(static_cast<GLsync> (context->presentSync)));
+		}
+		context->presentSync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
+	}
+
+	#if !WEBPLUG && !UNITY_EDITOR
+	GLint curFBO;
+	glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &curFBO);
+	GetScreenManager().PreBlit();
+	#endif
+
+	glXSwapBuffers(reinterpret_cast<Display*> (context->display), context->window);
+
+	#if !WEBPLUG && !UNITY_EDITOR
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, curFBO);
+	#endif
+#elif UNITY_OSX
+	if (gGraphicsCaps.gl.hasAppleFence)
+	{
+		if (!context->appleFenceValid)
+		{
+			OGL_CALL(glGenFencesAPPLE(1, &context->appleFence));
+			context->appleFenceValid = true;
+		}
+		else
+			OGL_CALL(glFinishFenceAPPLE(context->appleFence));
+
+		OGL_CALL(glSetFenceAPPLE(context->appleFence));
+	}
+
+	
+	#if WEBPLUG
+	// No need to swap in this case.
+	if ( GetScreenManager().IsUsingCoreAnimation() && !GetScreenManager().IsFullScreen() )
+		return;
+	#endif
+
+	#if !WEBPLUG && !UNITY_EDITOR
+	GLint curFBO;
+	glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &curFBO);
+	GetScreenManager().PreBlit();
+	#endif
+	
+	CGLFlushDrawable( context->cgl );
+	#if !WEBPLUG && !UNITY_EDITOR
+	glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, curFBO);
+	#endif
+#else
+	#error "Unknown platform"
+#endif
+}
+
+#if UNITY_OSX
+void CleanupPresentSync (GraphicsContextGL* context)
+{
+	if (context == NULL)
+		return;
+	
+	if (context->presentSync)
+	{
+		glDeleteSync(static_cast<GLsync> (context->presentSync));
+		context->presentSync = NULL;
+	}
+	
+	if (context->appleFenceValid)
+	{
+		glDeleteFencesAPPLE(1, &context->appleFence);
+		context->appleFenceValid = false;
+		context->appleFence = 0;
+	}
+}
+#endif
+
+#if UNITY_LINUX
+void CleanupPresentSync (GraphicsContextGL* context)
+{
+	if (context && context->presentSync)
+	{
+		glDeleteSync(static_cast<GLsync> (context->presentSync));
+		context->presentSync = NULL;
+	}
+}
+#endif
+
+void DestroyContextGL( GraphicsContextHandle& contextHandle ) 
+{
+	AutoGfxDeviceAcquireThreadOwnership autoOwn;
+	ErrorIf( GetMasterGraphicsContext () == contextHandle );
+	if ( !contextHandle.IsValid() )
+		return;
+	
+	// prevent stale pointer to main context
+	if( contextHandle == GetMainGraphicsContext() )
+	{
+		SetMainGraphicsContext( GetMasterGraphicsContext() );
+	}
+
+	GraphicsContextGL* context = OBJECT_FROM_HANDLE(contextHandle, GraphicsContextGL);
+	
+	gContexts.erase( *context );
+	
+	#if UNITY_WIN
+	
+	#if DEBUG_GL_CONTEXT
+	printf_console( "CTX: destroy context %p\n", (DWORD)context->hglrc );
+	#endif
+	
+	if (IsGfxDevice())
+	{
+		HGLRC curGL = wglGetCurrentContext ();
+		HDC curDC = wglGetCurrentDC ();
+		wglMakeCurrent (context->hdc, context->hglrc);
+		GetRealGfxDevice().UnbindObjects();
+		wglMakeCurrent (curDC, curGL);
+	}
+	
+	wglDeleteContext( context->hglrc );
+	ReleaseDC( context->hwnd, context->hdc );
+	
+	#elif UNITY_OSX
+	
+	CleanupPresentSync(context);
+	
+	#if DEBUG_GL_CONTEXT
+	printf_console( "CTX: destroy context %p\n", context->cgl );
+	#endif
+	
+	if (IsGfxDevice())
+	{
+		CGLContextObj currentCtx = CGLGetCurrentContext();
+		CGLSetCurrentContext(context->cgl);
+		GetRealGfxDevice().UnbindObjects();
+		CGLSetCurrentContext (currentCtx);
+	}
+	
+#if SUPPORT_AGL
+	if (context->agl)
+	{
+		if( aglDestroyContext(context->agl)==GL_FALSE )
+			printf_console( "aglDestroyContext failed!\n" );
+	}
+	else
+#endif
+	{
+		CGLError err = CGLDestroyContext(context->cgl);
+		if ( err )
+			printf_console( "CGLDestroyContext failed: %s!\n", CGLErrorString(err) );
+	}
+	#elif UNITY_LINUX
+
+	CleanupPresentSync(context);
+	
+	#if DEBUG_GL_CONTEXT
+	printf_console( "CTX: destroy context %p\n", context->context);
+	#endif
+	
+	Display *display = reinterpret_cast<Display*> (context->display);
+	GLXContext glxcontext = reinterpret_cast <GLXContext> (context->context);
+	if (IsGfxDevice())
+	{
+		GLXContext curGL = glXGetCurrentContext();
+		GLXDrawable curDrawable = glXGetCurrentDrawable ();
+		glXMakeCurrent(display, context->window, glxcontext);
+		GetRealGfxDevice().UnbindObjects();
+		glXMakeCurrent(display, curDrawable, curGL);
+	}
+
+	glXDestroyContext(display, glxcontext);
+
+	#else
+	#error "Unknown platform"
+	#endif
+
+	delete context;
+	contextHandle.Reset();
+}
+
+void DestroyMainContextGL()
+{
+	AutoGfxDeviceAcquireThreadOwnership autoOwn;
+	GraphicsContextHandle ctx = GetMainGraphicsContext();
+	if( ctx == GetMasterGraphicsContext() )
+		return;
+	
+	if( ctx.IsValid() )
+	{
+		glFinish();
+		ActivateGraphicsContext( GetMasterGraphicsContext() );
+		DestroyContextGL( ctx );
+	}
+	SetMainGraphicsContext( GetMasterGraphicsContext() );
+}
+
+
+void CleanupMasterContext()
+{
+	AutoGfxDeviceAcquireThreadOwnership autoOwn;
+	Assert(gMasterGraphicsContext.IsValid());
+	GraphicsContextGL* context = OBJECT_FROM_HANDLE(gMasterGraphicsContext,GraphicsContextGL);
+	gContexts.erase( *context );
+	
+	#if UNITY_WIN
+
+	#if DEBUG_GL_CONTEXT
+	printf_console( "GLDebug context: cleanup master context %x %s\n", (DWORD)context->hglrc, GetMasterContextClassName().c_str() );
+	#endif
+	wglMakeCurrent(NULL, NULL);
+
+	wglDeleteContext( context->hglrc );
+	#if DEBUG_GL_CONTEXT
+	printf_console( "GLDebug context: deleted glrc %x\n", context->hglrc );
+	#endif
+	ReleaseDC( context->hwnd, context->hdc );
+	#if DEBUG_GL_CONTEXT
+	printf_console( "GLDebug context: released dc %x for window %x\n", context->hdc, context->hwnd );
+	#endif
+	DestroyWindow( context->hwnd );
+	#if DEBUG_GL_CONTEXT
+	printf_console( "GLDebug context: destroyed window %x\n", context->hwnd );
+	#endif
+	winutils::UnregisterWindowClass( GetMasterContextClassName().c_str() );
+	
+	#elif UNITY_OSX
+	
+	CleanupMasterContextOSX (context);
+	
+	#elif UNITY_LINUX
+	Display *display = reinterpret_cast <Display*> (context->display);
+	glFlush ();
+	glXMakeCurrent(display, None, NULL);
+	glXDestroyContext(display, reinterpret_cast<GLXContext> (context->context));
+
+	#else
+	#error "Unknown platform"
+	#endif
+
+	delete context;
+	gMasterGraphicsContext.Reset();
+
+	#if !UNITY_EDITOR // editor does not do cleanup
+	Assert(gContexts.empty());
+	#endif
+}
+
+
+bool ActivateGraphicsContextGL( const GraphicsContextGL& context, int flags )
+{
+	Assert(IsRealGfxDeviceThreadOwner());
+	bool result = true;
+	
+	// In Web Player, do not unbind GL objects here:
+	// At least on Chrome/OSX, when switching to fullscreen (sometimes) calls
+	// into the plugin with an already destroyed
+	// GL context set as active and so we crash if we use that.
+	// Instead, unbind happens elsewhere for that case.
+	//
+	// However, have to unbind in the editor. Mostly when switching
+	// graphics emulation, multiple contexts for each view can get old
+	// stale state and picking would get wrong, case 408464.
+	#if !WEBPLUG
+	if( !(flags & kGLContextSkipUnbindObjects) && IsGfxDevice() )
+		GetRealGfxDevice().UnbindObjects();
+	#endif
+	
+	#if UNITY_WIN
+	Assert(context.hglrc);
+
+	if( !wglMakeCurrent(context.hdc, context.hglrc) ) 
+	{
+		printf_console( "GLContext: failed to activate %x: %s\n", context.hglrc, WIN_LAST_ERROR_TEXT );
+		result = false;
+	}
+	
+	#elif UNITY_OSX
+	
+	Assert(context.cgl != NULL);
+	#if DEBUG_GL_CONTEXT
+	char const* master = gMasterGraphicsContext.object ? (&context == gMasterGraphicsContext.object ? " (MASTER)" : "") : " (MASTER NULL)";
+	printf_console( "CTX: activate %p%s\n", context.cgl, master );
+	#endif
+	// In general the previous context needs to be flushed whenever switching to a new one.
+	// This is even more important in case of multithreaded GL, where not flushing can
+	// result in random crashes.
+	//
+	// However, don't flush if explicitly told not to. We don't flush when activating context
+	// at start of web player loop, just after creating web player window, and so on (i.e. whenever
+	// context activation happens because we initialize something). Skipping flush gets rid of
+	// "first frame shows garbage or previous game" in most cases.
+	if( !(flags & kGLContextSkipFlush) && CGLGetCurrentContext() != NULL)
+		glFlush();
+	
+	CGLError err = CGLSetCurrentContext(context.cgl);
+	if( err )
+		printf_console( "GLContext: CGLSetCurrentContext() failed: %s\n", CGLErrorString(err) );
+
+	#elif UNITY_LINUX
+	Assert (context.window);
+
+	if( !(flags & kGLContextSkipFlush) && glXGetCurrentContext() != NULL)
+		glFlush();
+
+	glXMakeCurrent(reinterpret_cast<Display*> (context.display), context.window, reinterpret_cast<GLXContext> (context.context));
+
+	#else
+	#error "Unknown platform"
+	#endif
+	
+	if( !(flags & kGLContextSkipUnbindObjects) && IsGfxDevice() )
+	{
+		// Must unbind objects otherwise stuff falls apart in other places, like read pixels stop
+		// to work when OpenGL ES 1.1 is being emulated in the editor.
+		GetRealGfxDevice().UnbindObjects();
+	}
+	if( !(flags & kGLContextSkipInvalidateState) && IsGfxDevice() )
+	{
+		// In some cases we cannot invalidate, e.g. when destroying render textures (case 490767).
+		GetRealGfxDevice().InvalidateState();
+	}
+	return result;
+}
+
+
+bool ActivateGraphicsContext (GraphicsContextHandle ctx, bool currentThreadOnly, int flags)
+{
+	bool isMainThread = Thread::CurrentThreadIsMainThread();
+	if (isMainThread && IsGfxDevice())
+	{
+		GetGfxDevice().AcquireThreadOwnership();
+	}
+#if ENABLE_PROFILER
+	bool activeTimerQueries = false;
+	if (IsGfxDevice())
+	{
+		activeTimerQueries = GetRealGfxDevice().TimerQueriesIsActive();
+		if (activeTimerQueries)
+			 GetRealGfxDevice().EndTimerQueries();
+	}
+#endif
+	Assert(isMainThread || IsRealGfxDeviceThreadOwner());
+	Assert (gMasterGraphicsContext.IsValid());
+	GraphicsContextGL* context = OBJECT_FROM_HANDLE(ctx,GraphicsContextGL);
+	bool res = ActivateGraphicsContextGL( *context, flags );
+#if ENABLE_PROFILER
+	if (activeTimerQueries)
+		GetRealGfxDevice().BeginTimerQueries();
+#endif
+	if (isMainThread && IsGfxDevice())
+	{
+		GetGfxDevice().ReleaseThreadOwnership();
+	}
+	if (!currentThreadOnly && IsGfxDevice() && isMainThread)
+	{
+		GetGfxDevice().SetActiveContext (context);
+	}
+	return res;
+}
+
+bool ActivateMasterContextGL()
+{
+	GraphicsContextHandle ctx = GetMasterGraphicsContext();
+	ErrorIf( !ctx.IsValid() );
+	return ActivateGraphicsContext (ctx);
+}
+
+bool ActivateMainContextGL ()
+{
+	GraphicsContextHandle ctx = GetMainGraphicsContext();
+	if( ctx.IsValid() )return ActivateGraphicsContext (ctx);
+	return false;
+}
+
+void AssignMasterGraphicsContextGL( GraphicsContextGL* ctx )
+{
+	Assert(!gMasterGraphicsContext.IsValid());
+	gMasterGraphicsContext.object = ctx;
+}
+
+
+
+#if UNITY_OSX
+
+GraphicsContextGL GetCurrentGraphicsContext ()
+{
+	GraphicsContextGL ctx;
+	ctx.cgl = CGLGetCurrentContext();
+#if SUPPORT_AGL
+	ctx.agl = aglGetCurrentContext();
+#endif
+	return ctx;
+}
+
+#elif UNITY_WIN
+
+GraphicsContextGL GetCurrentGraphicsContext ()
+{
+	GraphicsContextGL ctx;
+	ctx.hdc = wglGetCurrentDC();
+	ctx.hglrc = wglGetCurrentContext();
+	return ctx;
+}
+
+#elif UNITY_LINUX
+
+GraphicsContextGL GetCurrentGraphicsContext ()
+{
+	GraphicsContextGL ctx;
+	ctx.context = glXGetCurrentContext();
+	ctx.window = (Window)glXGetCurrentDrawable();
+	ctx.display = GetDisplay();
+	return ctx;
+}
+
+#else
+#error "Unknown platform"
+#endif