Add API to get the number of OpenGL buffer swaps, including through UNO

Change-Id: Iff29ac615ad4b6516790b1cbbde0215a3cd0efe6

include/vcl/opengl/OpenGLContext.hxx

@@ -186,6 +186,9 @@ public:
     /// reset the GL context so this context is not implicit in subsequent GL calls.
     void resetCurrent();
     void swapBuffers();
+
+    static sal_Int64 getBufferSwapCounter();
+
     void sync();
     void show();
 
@@ -249,6 +252,8 @@ private:
     ProgramCollection maPrograms;
     OpenGLProgram* mpCurrentProgram;
 
+    static sal_Int64 mnBufferSwapCounter;
+
 public:
     vcl::Region maClipRegion;
     int mnPainting;

offapi/com/sun/star/awt/XToolkitExperimental.idl

@@ -22,6 +22,11 @@ interface XToolkitExperimental : XToolkit2
   /** Process all pending idle events
    */
   void processEventsToIdle();
+
+
+  /** Get the number of OpenGL buffer swaps.
+   */
+  hyper getOpenGLBufferSwapCounter();
 };
 
 }; }; }; };

toolkit/Library_tk.mk

@@ -21,7 +21,10 @@ $(eval $(call gb_Library_Library,tk))
 
 $(eval $(call gb_Library_set_componentfile,tk,toolkit/util/tk))
 
-$(eval $(call gb_Library_use_external,tk,boost_headers))
+$(eval $(call gb_Library_use_externals,tk,\
+    boost_headers \
+    glew \
+))
 
 $(eval $(call gb_Library_set_include,tk,\
     $$(INCLUDE) \

toolkit/source/awt/vclxtoolkit.cxx

@@ -22,6 +22,13 @@
 #include <prewin.h>
 #include <postwin.h>
 #endif
+#if defined UNX && !defined MACOSX
+#include <prex.h>
+#include "GL/glxew.h"
+#include <postx.h>
+#undef None // Avoid clash with the one in <toolkit/awt/scrollabledialog.hxx>
+#undef Status // Sigh... used for instance as parameter name in css::awt::XImageConsumer
+#endif
 #include <com/sun/star/awt/WindowAttribute.hpp>
 #include <com/sun/star/awt/VclWindowPeerAttribute.hpp>
 #include <com/sun/star/awt/WindowClass.hpp>
@@ -113,6 +120,7 @@
 #include <vcl/window.hxx>
 #include <vcl/wrkwin.hxx>
 #include <vcl/throbber.hxx>
+#include <vcl/opengl/OpenGLContext.hxx>
 #include "toolkit/awt/vclxspinbutton.hxx"
 #include <tools/debug.hxx>
 #include <comphelper/processfactory.hxx>
@@ -195,6 +203,9 @@ public:
     virtual void SAL_CALL processEventsToIdle()
         throw (css::uno::RuntimeException, std::exception) override;
 
+    virtual sal_Int64 SAL_CALL getOpenGLBufferSwapCounter()
+        throw (css::uno::RuntimeException, std::exception) override;
+
     // css::awt::XToolkit
     css::uno::Reference< css::awt::XWindowPeer >  SAL_CALL getDesktopWindow(  ) throw(css::uno::RuntimeException, std::exception) override;
     css::awt::Rectangle                                        SAL_CALL getWorkArea(  ) throw(css::uno::RuntimeException, std::exception) override;
@@ -1906,6 +1917,8 @@ void SAL_CALL VCLXToolkit::reschedule()
     Application::Reschedule(true);
 }
 
+// css::awt::XToolkitExperimental
+
 void SAL_CALL VCLXToolkit::processEventsToIdle()
     throw (css::uno::RuntimeException, std::exception)
 {
@@ -1913,6 +1926,12 @@ void SAL_CALL VCLXToolkit::processEventsToIdle()
     Scheduler::ProcessEventsToIdle();
 }
 
+sal_Int64 SAL_CALL VCLXToolkit::getOpenGLBufferSwapCounter()
+    throw (css::uno::RuntimeException, std::exception)
+{
+     return OpenGLContext::getBufferSwapCounter();
+}
+
 // css:awt:XToolkitRobot
 
 void SAL_CALL VCLXToolkit::keyPress( const css::awt::KeyEvent & aKeyEvent )

vcl/source/opengl/OpenGLContext.cxx

@@ -50,6 +50,8 @@ static std::vector<GLXContext> g_vShareList;
 static std::vector<HGLRC> g_vShareList;
 #endif
 
+sal_Int64 OpenGLContext::mnBufferSwapCounter = 0;
+
 GLWindow::~GLWindow()
 {
 #if defined( UNX ) && !defined MACOSX && !defined IOS && !defined ANDROID && !defined(LIBO_HEADLESS)
@@ -1535,6 +1537,8 @@ void OpenGLContext::swapBuffers()
     glXSwapBuffers(m_aGLWin.dpy, m_aGLWin.win);
 #endif
 
+    mnBufferSwapCounter++;
+
     static bool bSleep = getenv("SAL_GL_SLEEP_ON_SWAP");
     if (bSleep)
     {
@@ -1544,6 +1548,11 @@ void OpenGLContext::swapBuffers()
     }
 }
 
+sal_Int64 OpenGLContext::getBufferSwapCounter()
+{
+    return mnBufferSwapCounter;
+}
+
 void OpenGLContext::sync()
 {
     OpenGLZone aZone;