Working on RenderTarget example

src/dawnopengl/display/BackBufferRenderTarget.hpp

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+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "dawnopengl.hpp"
+#include "display/RenderTarget.hpp"
+#include "display/RenderManager.hpp"
+
+namespace Dawn {
+  class BackBufferRenderTarget : public RenderTarget {
+    private:
+      std::weak_ptr<RenderManager> renderManager;
+      float_t width = 1;
+      float_t height = 1;
+      struct Color clearColor = COLOR_CORNFLOWER_BLUE;
+
+    public:
+      BackBufferRenderTarget(std::weak_ptr<RenderManager> renderManager);
+
+      float_t getWidth() override;
+      float_t getHeight() override;
+
+      void setSize(float_t width, float_t height);
+
+      void setClearColor(struct Color color);
+
+      void clear(flag8_t clearFlags) override;
+      void bind() override;
+  };
+}