1 files changed, 130 insertions, 0 deletions
diff --git a/include/vcl/opengl/OpenGLContext.hxx b/include/vcl/opengl/OpenGLContext.hxx
new file mode 100644
index 000000000..428df1266
--- /dev/null
+++ b/include/vcl/opengl/OpenGLContext.hxx
@@ -0,0 +1,130 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <vcl/dllapi.h>
+#include <vcl/sysdata.hxx>
+#include <vcl/vclptr.hxx>
+#include <rtl/ref.hxx>
+
+class Point;
+class Size;
+class SystemChildWindow;
+namespace vcl { class Window; }
+
+/// Holds the information of our new child window
+struct VCL_DLLPUBLIC GLWindow
+{
+    unsigned int            Width;
+    unsigned int            Height;
+    bool bMultiSampleSupported;
+
+    GLWindow()
+        : Width(0)
+        , Height(0)
+        , bMultiSampleSupported(false)
+    {
+    }
+
+    virtual bool Synchronize(bool bOnoff) const;
+
+    virtual ~GLWindow();
+};
+
+class VCL_DLLPUBLIC OpenGLContext
+{
+    friend class OpenGLTests;
+protected:
+    OpenGLContext();
+public:
+    static rtl::Reference<OpenGLContext> Create();
+    virtual ~OpenGLContext();
+
+    // Avoid implicitly defined copy constructors/assignments for the DLLPUBLIC class (they may
+    // require forward-declared classes used internally to be defined in places using OpenGLContext)
+    OpenGLContext(const OpenGLContext&) = delete;
+    OpenGLContext(OpenGLContext&&) = delete;
+    OpenGLContext& operator=(const OpenGLContext&) = delete;
+    OpenGLContext& operator=(OpenGLContext&&) = delete;
+
+    void acquire() { mnRefCount++; }
+    void release() { if ( --mnRefCount == 0 ) delete this; }
+    void dispose();
+
+    void requestLegacyContext();
+
+    bool init(vcl::Window* pParent);
+
+    void reset();
+
+    /// Is this GL context the current context ?
+    virtual bool isCurrent();
+    /// Is any GL context the current context ?
+    virtual bool isAnyCurrent();
+    /// release bound resources from the current context
+    static void clearCurrent();
+    /// release contexts etc. before (potentially) allowing another thread run.
+    static void prepareForYield();
+    /// Is there a current GL context ?
+    static bool hasCurrent();
+
+    /// make this GL context current - so it is implicit in subsequent GL calls
+    virtual void makeCurrent();
+    /// Put this GL context to the end of the context list.
+    void registerAsCurrent();
+    /// reset the GL context so this context is not implicit in subsequent GL calls.
+    virtual void resetCurrent();
+    /// unbind the GL_FRAMEBUFFER to its default state, needed for gtk3
+    virtual void restoreDefaultFramebuffer();
+    virtual void swapBuffers();
+    virtual void sync();
+    void show();
+
+    void setWinPosAndSize(const Point &rPos, const Size& rSize);
+    virtual const GLWindow& getOpenGLWindow() const = 0;
+
+    SystemChildWindow* getChildWindow();
+    const SystemChildWindow* getChildWindow() const;
+
+    bool isInitialized() const
+    {
+        return mbInitialized;
+    }
+
+    virtual SystemWindowData generateWinData(vcl::Window* pParent, bool bRequestLegacyContext);
+
+private:
+    virtual void initWindow();
+    virtual void destroyCurrentContext();
+    virtual void adjustToNewSize();
+
+protected:
+    bool InitGL();
+    static void InitGLDebugging();
+    static void InitChildWindow(SystemChildWindow *pChildWindow);
+    static void BuffersSwapped();
+    virtual GLWindow& getModifiableOpenGLWindow() = 0;
+    virtual bool ImplInit();
+
+    VclPtr<vcl::Window> m_xWindow;
+    VclPtr<vcl::Window> mpWindow; //points to m_pWindow or the parent window, don't delete it
+    VclPtr<SystemChildWindow> m_pChildWindow;
+    bool mbInitialized;
+    int  mnRefCount;
+    bool mbRequestLegacyContext;
+
+public:
+
+    // Don't hold references to ourselves:
+    OpenGLContext *mpPrevContext;
+    OpenGLContext *mpNextContext;
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */