rename: IUP 库目录重命名为 libs/IUP

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

libs/IUP/include/iupim.h

@@ -0,0 +1,36 @@
+/** \file
+ * \brief Utilities using IM
+ *
+ * See Copyright Notice in "iup.h"
+ */
+
+#ifndef __IUPIM_H
+#define __IUPIM_H
+
+#if	defined(__cplusplus)
+extern "C" {
+#endif
+
+
+void IupImOpen(void);  /* optional */
+
+Ihandle* IupLoadImage(const char* filename);
+int IupSaveImage(Ihandle* ih, const char* filename, const char* format);
+
+Ihandle* IupLoadAnimation(const char* filename);
+Ihandle* IupLoadAnimationFrames(const char** filename_list, int file_count);
+
+#ifdef __IM_IMAGE_H
+imImage* IupGetNativeHandleImage(void* handle);
+void* IupGetImageNativeHandle(const imImage* image);
+
+Ihandle* IupImageFromImImage(const imImage* image);
+imImage* IupImageToImImage(Ihandle* iup_image);
+#endif
+
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif