Initial release

engine/vendor/vst3sdk/vstgui4/vstgui/lib/copenglview.cpp

@@ -0,0 +1,188 @@
+// This file is part of VSTGUI. It is subject to the license terms 
+// in the LICENSE file found in the top-level directory of this
+// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
+
+#include "copenglview.h"
+#include "platform/iplatformframe.h"
+#include "cframe.h"
+#include <cassert>
+
+#if VSTGUI_OPENGL_SUPPORT
+
+namespace VSTGUI {
+
+//-----------------------------------------------------------------------------
+COpenGLView::COpenGLView (const CRect& size)
+: CView (size)
+{
+}
+
+//-----------------------------------------------------------------------------
+COpenGLView::~COpenGLView () noexcept
+{
+	vstgui_assert (platformOpenGLView == nullptr);
+}
+
+//-----------------------------------------------------------------------------
+void COpenGLView::updatePlatformOpenGLViewSize ()
+{
+	if (platformOpenGLView)
+	{
+		CRect visibleSize (getVisibleViewSize ());
+		CPoint offset;
+		localToFrame (offset);
+		visibleSize.offset (offset.x, offset.y);
+
+		CGraphicsTransform tm;
+		tm.scale (scaleFactor, scaleFactor);
+		tm.transform (visibleSize);
+
+		platformOpenGLView->viewSizeChanged (visibleSize);
+		platformOpenGLView->invalidRect (getViewSize ());
+	}
+}
+
+//-----------------------------------------------------------------------------
+bool COpenGLView::createPlatformOpenGLView ()
+{
+	vstgui_assert (platformOpenGLView == nullptr);
+	IPlatformFrame* platformFrame = getFrame ()->getPlatformFrame ();
+	platformOpenGLView = platformFrame ? platformFrame->createPlatformOpenGLView () : nullptr;
+	if (platformOpenGLView)
+	{
+		if (platformOpenGLView->init (this, getPixelFormat ()))
+		{
+			platformOpenGLView->makeContextCurrent ();
+			updatePlatformOpenGLViewSize ();
+			platformOpenGLViewCreated ();
+			platformOpenGLViewSizeChanged ();
+			getFrame ()->registerScaleFactorChangedListener (this);
+			return true;
+		}
+		platformOpenGLView = nullptr;
+	}
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+bool COpenGLView::destroyPlatformOpenGLView ()
+{
+	if (platformOpenGLView)
+	{
+		getFrame ()->unregisterScaleFactorChangedListener (this);
+		platformOpenGLViewWillDestroy ();
+		platformOpenGLView->remove ();
+		platformOpenGLView = nullptr;
+		return true;
+	}
+	return false;
+}
+
+// CView
+//-----------------------------------------------------------------------------
+void COpenGLView::setViewSize (const CRect& rect, bool invalid)
+{
+	CView::setViewSize (rect, invalid);
+	updatePlatformOpenGLViewSize ();
+	if (platformOpenGLView)
+	{
+		platformOpenGLView->lockContext ();
+		platformOpenGLView->makeContextCurrent ();
+		platformOpenGLViewSizeChanged ();
+		platformOpenGLView->unlockContext ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void COpenGLView::parentSizeChanged ()
+{
+	CView::parentSizeChanged ();
+	updatePlatformOpenGLViewSize ();
+	if (platformOpenGLView)
+	{
+		platformOpenGLView->lockContext ();
+		platformOpenGLView->makeContextCurrent ();
+		platformOpenGLViewSizeChanged ();
+		platformOpenGLView->unlockContext ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+void COpenGLView::reshape ()
+{
+	if (platformOpenGLView)
+	{
+		platformOpenGLView->lockContext ();
+		platformOpenGLView->makeContextCurrent ();
+		platformOpenGLViewSizeChanged ();
+		platformOpenGLView->unlockContext ();
+	}
+}
+
+//-----------------------------------------------------------------------------
+bool COpenGLView::attached (CView* parent)
+{
+	if (CView::attached (parent))
+	{
+		return createPlatformOpenGLView ();
+	}
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+bool COpenGLView::removed (CView* parent)
+{
+	destroyPlatformOpenGLView ();
+	return CView::removed (parent);
+}
+
+//-----------------------------------------------------------------------------
+void COpenGLView::setVisible (bool state)
+{
+	if (state != isVisible ())
+	{
+		CView::setVisible (state);
+		if (isAttached ())
+		{
+			if (state && platformOpenGLView)
+			{
+				createPlatformOpenGLView ();
+			}
+			else if (state == false && platformOpenGLView != nullptr)
+			{
+				destroyPlatformOpenGLView ();
+			}
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+void COpenGLView::invalidRect (const CRect& rect)
+{
+	if (platformOpenGLView)
+	{
+		CRect r (rect);
+		r.offset (-getViewSize ().left, -getViewSize ().top);
+
+		CGraphicsTransform tm;
+		tm.scale (scaleFactor, scaleFactor);
+		tm.transform (r);
+
+		platformOpenGLView->invalidRect (r);
+	}
+	else
+	{
+		CView::invalidRect (rect);
+	}
+}
+
+//-----------------------------------------------------------------------------
+void COpenGLView::onScaleFactorChanged (CFrame* frame, double newScaleFactor)
+{
+	scaleFactor = frame->getZoom ();
+	updatePlatformOpenGLViewSize ();
+}
+
+} // VSTGUI
+
+#endif // VSTGUI_OPENGL_SUPPORT