[core] refactor RendererBackend

1 files changed, 42 insertions, 0 deletions

diff --git a/platform/glfw/glfw_gl_backend.hpp b/platform/glfw/glfw_gl_backend.hpp
new file mode 100644
index 0000000000..ba4f6fa788
--- /dev/null
+++ b/platform/glfw/glfw_gl_backend.hpp
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "glfw_backend.hpp"
+
+#include <mbgl/gfx/renderable.hpp>
+#include <mbgl/gl/renderer_backend.hpp>
+
+struct GLFWwindow;
+
+class GLFWGLBackend final : public GLFWBackend,
+                            public mbgl::gl::RendererBackend,
+                            public mbgl::gfx::Renderable {
+public:
+    GLFWGLBackend(GLFWwindow*);
+    ~GLFWGLBackend() override;
+
+    // GLFWRendererBackend implementation
+public:
+    mbgl::gfx::RendererBackend& getRendererBackend() override {
+        return *this;
+    }
+    mbgl::Size getSize() const override;
+    void setSize(mbgl::Size) override;
+
+    // mbgl::gfx::RendererBackend implementation
+public:
+    mbgl::gfx::Renderable& getDefaultRenderable() override {
+        return *this;
+    }
+
+protected:
+    void activate() override;
+    void deactivate() override;
+
+    // mbgl::gl::RendererBackend implementation
+protected:
+    mbgl::gl::ProcAddress getExtensionFunctionPointer(const char*) override;
+    void updateAssumedState() override;
+
+private:
+    GLFWwindow* window;
+};