One Month In Minsk. Made in Belarus.

1 files changed, 69 insertions, 0 deletions

diff --git a/map/qgl_render_context.cpp b/map/qgl_render_context.cpp
new file mode 100644
index 0000000000..ce7f40ab87
--- /dev/null
+++ b/map/qgl_render_context.cpp
@@ -0,0 +1,69 @@
+#include "../base/SRC_FIRST.hpp"
+
+#include "qgl_render_context.hpp"
+
+#include "../base/assert.hpp"
+#include "../base/logging.hpp"
+#include "../base/ptr_utils.hpp"
+
+#include <QtOpenGL/QGLContext>
+#include <QtOpenGL/QGLWidget>
+#include <QtOpenGL/QGLFramebufferObject>
+
+#include "../base/start_mem_debug.hpp"
+
+namespace qt
+{
+  namespace gl
+  {
+    struct null_deleter
+    {
+      template <typename T> void operator()(T*) {}
+    };
+
+    /// Create compatible render context
+    RenderContext::RenderContext(QGLWidget * widget)
+    {
+      /// Dirty hack, but we'll use it with caution, I promise.
+      m_context = shared_ptr<QGLContext>(const_cast<QGLContext*>(widget->context()), null_deleter());
+    }
+
+    void RenderContext::makeCurrent()
+    {
+      m_context->makeCurrent();
+    }
+
+    shared_ptr<yg::gl::RenderContext> RenderContext::createShared()
+    {
+      return shared_ptr<yg::gl::RenderContext>(new RenderContext(this));
+    }
+
+    void RenderContext::endThreadDrawing()
+    {
+      m_context.reset();
+    }
+
+    RenderContext::RenderContext(RenderContext * renderContext)
+    {
+      QGLFormat const format = renderContext->context()->format();
+      m_parent = make_shared_ptr(new QWidget());
+      m_context = shared_ptr<QGLContext>(new QGLContext(format, m_parent.get()));
+      bool sharedContextCreated = m_context->create(renderContext->context().get());
+      bool isSharing = m_context->isSharing();
+      ASSERT(sharedContextCreated && isSharing, ("cannot create shared opengl context"));
+      if (!sharedContextCreated || !isSharing)
+        m_context.reset();
+    }
+
+    RenderContext::~RenderContext()
+    {
+      m_context.reset();
+      m_parent.reset();
+    }
+
+    shared_ptr<QGLContext> RenderContext::context() const
+    {
+      return m_context;
+    }
+  }
+}