begin cleanup from other project

lib/image_model.h

@@ -0,0 +1,47 @@
+#include "imgui.h"
+#include <sstream>
+#include <string_view>
+
+#if defined(__APPLE__)
+#include <SDL2/SDL.h>
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+#include <SDL2/SDL_opengles.h>
+#else
+#include <SDL2/SDL_opengl.h>
+#endif
+#else
+#include <SDL.h>
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+#include <SDL_opengles2.h>
+#else
+#include <SDL_opengl.h>
+#endif
+#endif
+
+class ImageBundle {
+public:
+  int width;
+  int height;
+  int channels;
+  ImTextureID texture;
+  GLuint *glTextureID;
+  std::string_view raw_buffer;
+  uint8_t *image;
+  bool loaded;
+  std::string fname;
+
+  ImageBundle() {
+    fname = "";
+    loaded = false;
+  }
+
+  float aspectRatio() { return (float)width / (float)height; }
+
+  int calcResizedWidth(int newHeight) {
+    return (int)((float)newHeight * (1.0 / aspectRatio()));
+  }
+
+  int calcResizedHeight(int newWidth) {
+    return (int)((float)newWidth * (aspectRatio()));
+  }
+};