fix: 修复 MUSIC 需要依赖 initgraph() 初始化的问题 (#159 引入) (#231)

* adjust: 允许 dll 单独加载

* fix: 修复 MUSIC 需要依赖 initgraph() 初始化的问题(#159 引入)

* refactor: dll import 中移除冗余的初始化部分

src/ege_dllimport.cpp

@@ -27,14 +27,7 @@ namespace dll
     static HIMC (WINAPI *func_ImmGetContext)(HWND);
     static BOOL (WINAPI *func_ImmSetCompositionWindow)(HIMC , LPCOMPOSITIONFORM);
 
-    static void initImm32Dll()
-    {
-        imm32Dll = NULL;
-        func_ImmGetContext           = NULL;
-        func_ImmSetCompositionWindow = NULL;
-    }
-
-    static bool loadImm32Dll()
+    bool loadImm32Dll()
     {
         if(imm32Dll == NULL) {
             imm32Dll = LoadLibraryA("imm32.dll");
@@ -83,14 +76,7 @@ namespace dll
     static BOOL (WINAPI *func_AlphaBlend)(HDC hdcDest,int xoriginDest,int yoriginDest,int wDest,int hDest,HDC hdcSrc,int xoriginSrc,int yoriginSrc,int wSrc,int hSrc,BLENDFUNCTION ftn);
     static BOOL (WINAPI *func_GradientFill)(HDC hdc, PTRIVERTEX pVertex, ULONG nVertex, PVOID pMesh, ULONG nMesh, ULONG ulMode);
 
-    static void initMsimg32Dll()
-    {
-        msimg32Dll = NULL;
-        func_AlphaBlend   = NULL;
-        func_GradientFill = NULL;
-    }
-
-    static bool loadMsimg32Dll()
+    bool loadMsimg32Dll()
     {
         // -- msimg32.dll --
         if (msimg32Dll == NULL) {
@@ -142,17 +128,7 @@ namespace dll
     static MMRESULT (WINAPI *func_timeKillEvent)(UINT uTimerID);
     static MCIERROR (WINAPI *func_mciSendCommandW)(MCIDEVICEID mciId,UINT uMsg,DWORD_PTR dwParam1,DWORD_PTR dwParam2);
 
-    static void initWinmmDll()
-    {
-        winmmDll = NULL;
-        func_timeBeginPeriod = NULL;
-        func_timeEndPeriod   = NULL;
-        func_timeSetEvent    = NULL;
-        func_timeKillEvent   = NULL;
-        func_mciSendCommandW = NULL;
-    }
-
-    static bool loadWinmmDll()
+    bool loadWinmmDll()
     {
         // winmm.dll
         if (winmmDll == NULL) {
@@ -251,14 +227,6 @@ namespace dll
     void loadDllsIfNot()
     {
         static bool loadingIsFinished = false;
-        static bool firstCall = true;            // 初次调用标记, 因不同编译单元初始化顺序未保证, 防止静态变量未初始化
-
-        if (firstCall) {
-            initImm32Dll();
-            initMsimg32Dll();
-            initWinmmDll();
-            firstCall = false;
-        }
 
         if (!loadingIsFinished) {
             bool isSuccessful = true;

src/ege_dllimport.h

@@ -5,9 +5,18 @@
 
 namespace dll
 {
-    // 如果没加载 dll 则进行加载
+    // 加载所有的 dll (可重复调用)
     void loadDllsIfNot();
 
+    // 加载 winmm.dll (可重复调用)
+    bool loadWinmmDll();
+
+    // 加载 msimg32.dll (可重复调用)
+    bool loadMsimg32Dll();
+
+    // 加载 imm32.dll (可重复调用)
+    bool loadImm32Dll();
+
     // 释放所有加载的 dll
     void freeDlls();
 

src/music.cpp

@@ -29,6 +29,7 @@ MUSIC::MUSIC()
 {
     m_DID        = MUSIC_ERROR;
     m_dwCallBack = 0;
+    dll::loadWinmmDll();
 }
 
 // Class MUSIC Destruction