Usermode/AxWin4 - Working in shared memory usage

[tpg/acess2.git] / Usermode / Libraries / libaxwin4.so_src / wm.cpp

diff --git a/Usermode/Libraries/libaxwin4.so_src/wm.cpp b/Usermode/Libraries/libaxwin4.so_src/wm.cpp
index f023ea8..fdfa32c 100644 (file)
--- a/Usermode/Libraries/libaxwin4.so_src/wm.cpp
+++ b/Usermode/Libraries/libaxwin4.so_src/wm.cpp
@@ -35,6 +35,8 @@ extern "C" tAxWin4_Window *AxWin4_CreateWindow(const char *Name)
        tAxWin4_Window *ret = new tAxWin4_Window();
        gWindowList[id] = ret;
        ret->m_id = id;
+       ret->m_fd = -1;
+       ret->m_buffer = nullptr;
        // Request creation of window
        CSerialiser     message;
        message.WriteU8(IPCMSG_CREATEWIN);
@@ -97,11 +99,30 @@ extern "C" void AxWin4_SetTitle(tAxWin4_Window *Window, const char *Title)
 
 extern "C" void *AxWin4_GetWindowBuffer(tAxWin4_Window *Window)
 {
-       //if( !Window->m_buffer )
-       //{
-       //      // TODO: Support non-blocking operations        
-       //}
-       return NULL;
+       if( Window->m_fd == -1 )
+       {
+               CSerialiser     req;
+               req.WriteU8(IPCMSG_GETWINBUF);
+               req.WriteU16(Window->m_id);
+               
+               CDeserialiser   response = GetSyncReply(req, IPCMSG_GETWINBUF);
+               if( response.ReadU16() != Window->m_id ) {
+                       
+               }
+               
+               uint64_t handle = response.ReadU64();
+               Window->m_fd = _SysUnMarshalFD(handle);
+               
+               _SysDebug("AxWin4_GetWindowBuffer: %llx = %i", handle, Window->m_fd);
+       }
+
+       if( !Window->m_buffer )
+       {
+               size_t  size = 640*480*4;
+               Window->m_buffer = _SysMMap(NULL, size, MMAP_PROT_WRITE, MMAP_MAP_SHARED, Window->m_fd, 0);
+       }
+
+       return Window->m_buffer;
 }
 
 };     // namespace AxWin