Initial release

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

@@ -0,0 +1,82 @@
+// 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
+
+#pragma once
+
+#include "cview.h"
+#include "iscalefactorchangedlistener.h"
+#include "platform/iplatformopenglview.h"
+
+#if VSTGUI_OPENGL_SUPPORT
+
+namespace VSTGUI {
+
+/*
+TODO: Documentation
+
+	To setup OpenGL for a normal 2D matrix use this to setup the OpenGL context:
+
+	CRect r (getViewSize ());
+	glViewport (0, 0, r.getWidth (), r.getHeight ());
+	gluOrtho2D (r.left, r.right, r.bottom, r.top);
+	glTranslated (r.left, r.top, 0);
+
+*/
+//-----------------------------------------------------------------------------
+// COpenGLView Declaration
+/// @brief a subview which uses OpenGL for drawing
+/// @ingroup new_in_4_1
+//-----------------------------------------------------------------------------
+class COpenGLView : public CView, public IOpenGLView, public IScaleFactorChangedListener
+{
+public:
+	explicit COpenGLView (const CRect& size);
+	~COpenGLView () noexcept override;
+
+	// IOpenGLView	
+	/** will be called when the view was marked invalid or the view was resized */
+	void drawOpenGL (const CRect& updateRect) override = 0;
+	void reshape () override;
+
+	// CView
+	void setViewSize (const CRect& rect, bool invalid = true) override;
+	void parentSizeChanged () override;
+	bool removed (CView* parent) override;
+	bool attached (CView* parent) override;
+	void invalidRect (const CRect& rect) override;
+	void setVisible (bool state) override;
+
+	// IScaleFactorChangedListener
+	void onScaleFactorChanged (CFrame* frame, double newScaleFactor) override;
+
+	CLASS_METHODS_NOCOPY (COpenGLView, CView)
+protected:
+	//-----------------------------------------------------------------------------
+	/// @name COpenGLView Methods
+	//-----------------------------------------------------------------------------
+	//@{
+	/** will be called after the platform opengl view was created */
+	virtual void platformOpenGLViewCreated () {}
+	/** will be called before the platform opengl view will be destroyed */
+	virtual void platformOpenGLViewWillDestroy () {}
+	/** will be called whenever the platform opengl view size has changed */
+	virtual void platformOpenGLViewSizeChanged () {}
+	/** subclasses should return a pixelformat here if they don't want to use the default one */
+	virtual PixelFormat* getPixelFormat () { return nullptr; }
+	IPlatformOpenGLView* getPlatformOpenGLView () const { return platformOpenGLView; }
+	//@}
+
+private:
+	void updatePlatformOpenGLViewSize ();
+	bool createPlatformOpenGLView ();
+	bool destroyPlatformOpenGLView ();
+
+	double scaleFactor {1.};
+
+	SharedPointer<IPlatformOpenGLView> platformOpenGLView;
+};
+
+} // VSTGUI
+
+#endif // VSTGUI_OPENGL_SUPPORT