Add IGraphicsEffect interface

Author: adazem009

CMakeLists.txt

@@ -51,6 +51,7 @@ target_sources(scratchcpp
     include/scratchcpp/iimageformat.h
     include/scratchcpp/iimageformatfactory.h
     include/scratchcpp/rect.h
+    include/scratchcpp/igraphicseffect.h
 )
 
 add_library(zip SHARED

include/scratchcpp/igraphicseffect.h

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <string>
+
+#include "iimageformat.h"
+
+namespace libscratchcpp
+{
+
+/*! \brief The IGraphicsEffects class is an interface for implementing custom graphics effects. */
+class LIBSCRATCHCPP_EXPORT IGraphicsEffect
+{
+    public:
+        virtual ~IGraphicsEffect() { }
+
+        /*! Returns the name of the graphics effect. */
+        virtual std::string name() const = 0;
+
+        /*! Applies the effect on the given bitmap. */
+        virtual void apply(Rgb **bitmap, unsigned int width, unsigned int height, double value) const = 0;
+};
+
+} // namespace libscratchcpp