[wpebackend-rdk/wpeframework-clientlibraries]: Add and use timer based vsync for scanout on VC6.

Author: msieben

package/wpe/wpebackend-rdk/0001-add-vsync-timer-for-scanout.patch

@@ -0,0 +1,43 @@
+--- a/src/wpeframework/display.cpp
++++ b/src/wpeframework/display.cpp
+@@ -219,6 +220,16 @@
+     _callback->Touch(index, state, x, y);
+ }
+ 
++gboolean vsyncCallback (gpointer data) {
++    Compositor::IDisplay* _display = static_cast <Compositor::IDisplay *> (data);
++
++    if (_display != nullptr) {
++        /* int */ _display->Process (0);
++    }
++
++    return TRUE;
++}
++
+ // -----------------------------------------------------------------------------------------
+ // Display wrapper around the wayland abstraction class
+ // -----------------------------------------------------------------------------------------
+@@ -247,6 +258,23 @@
+         g_source_set_can_recurse(m_eventSource, TRUE);
+         g_source_attach(m_eventSource, g_main_context_get_thread_default());
+     }
++    else {
++        const char* _MAXFPS = ::getenv("WEBKIT_MAXIMUM_FPS");
++
++        uint32_t _fps = 60;
++
++        if (_MAXFPS != nullptr) {
++            _fps = ::atoi(_MAXFPS);
++
++            if (_fps == 0 || _fps > 60) {
++                fprintf (stdout, "WEBKIT_MAXIMUM_FPS out of range. Limiting to 60 frames per second.\n");
++                _fps = 60;
++            }
++        }
++
++        /* guint */ g_timeout_add (1000/_fps, vsyncCallback, m_display);
++    }
++
+ }
+ 
+ Display::~Display()

package/wpe/wpeframework-clientlibraries/0001-use-invalid-file-descriptor-for-vsync-scanout-on-vc6.patch

@@ -0,0 +1,14 @@
+--- a/Source/compositorclient/RPI/Implementation.cpp
++++ b/Source/compositorclient/RPI/Implementation.cpp
+@@ -907,7 +907,11 @@
+ 
+ int Display::FileDescriptor() const
+ {
++#ifndef VC6
+     return (_platform.Descriptor());
++#else
++    return -1;
++#endif
+ }
+ 
+ Compositor::IDisplay::ISurface* Display::SurfaceByName(const std::string& name)