Added graphics/ImageData class

src/graphics/ImageData.cpp

@@ -0,0 +1,14 @@
+#include "ImageData.h"
+
+ImageData::ImageData(ImageFormat format, uint width, uint height, void* data) 
+    : format(format), width(width), height(height), data(data) {
+}
+
+ImageData::~ImageData() {
+    switch (format) {
+        case ImageFormat::rgb888:
+        case ImageFormat::rgba8888:
+            delete[] data;
+            break;
+    }
+}