Repo created

qt/qt_common/qtoglcontext.hpp

@@ -0,0 +1,66 @@
+#pragma once
+
+#include "drape/oglcontext.hpp"
+
+#include <QOpenGLFramebufferObject>
+
+#include <QtGui/QOffscreenSurface>
+#include <QtGui/QOpenGLContext>
+
+#include <atomic>
+#include <memory>
+#include <mutex>
+
+namespace qt
+{
+namespace common
+{
+class QtRenderOGLContext : public dp::OGLContext
+{
+public:
+  QtRenderOGLContext(QOpenGLContext * rootContext, QOffscreenSurface * surface);
+
+  void Present() override;
+  void MakeCurrent() override;
+  void DoneCurrent() override;
+  void SetFramebuffer(ref_ptr<dp::BaseFramebuffer> framebuffer) override;
+  void Resize(uint32_t w, uint32_t h) override;
+
+  bool AcquireFrame();
+  GLuint GetTextureHandle() const;
+  QRectF const & GetTexRect() const;
+
+private:
+  QOffscreenSurface * m_surface = nullptr;
+  std::unique_ptr<QOpenGLContext> m_ctx;
+
+  std::unique_ptr<QOpenGLFramebufferObject> m_frontFrame;
+  std::unique_ptr<QOpenGLFramebufferObject> m_backFrame;
+  std::unique_ptr<QOpenGLFramebufferObject> m_acquiredFrame;
+  QRectF m_acquiredFrameRect = QRectF(0.0, 0.0, 0.0, 0.0);
+  QRectF m_frameRect = QRectF(0.0, 0.0, 0.0, 0.0);
+  bool m_frameUpdated = false;
+
+  std::atomic<bool> m_isContextAvailable;
+  int m_width = 0;
+  int m_height = 0;
+
+  std::mutex m_frameMutex;
+};
+
+class QtUploadOGLContext : public dp::OGLContext
+{
+public:
+  QtUploadOGLContext(QOpenGLContext * rootContext, QOffscreenSurface * surface);
+
+  void Present() override;
+  void MakeCurrent() override;
+  void DoneCurrent() override;
+  void SetFramebuffer(ref_ptr<dp::BaseFramebuffer> framebuffer) override;
+
+private:
+  QOffscreenSurface * m_surface = nullptr;  // non-owning ptr
+  std::unique_ptr<QOpenGLContext> m_ctx;
+};
+}  // namespace common
+}  // namespace qt