Usermode/Libraries/libaxwin3.so_src/wm.c

   1 /*
   2  * AxWin3 Interface Library
   3  * - By John Hodge (thePowersGang)
   4  *
   5  * wm.c
   6  * - Core window management functions
   7  */
   8 #include <axwin3/axwin.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include "include/ipc.h"
  12 #include "include/internal.h"
  13
  14 #define WINDOWS_PER_ALLOC       (63)
  15
  16 typedef struct sWindowBlock     tWindowBlock;
  17
  18 typedef struct sAxWin3_Window   tWindow;
  19
  20 // === STRUCTURES ===
  21 struct sWindowBlock
  22 {
  23         tWindowBlock    *Next;
  24         tWindow *Windows[WINDOWS_PER_ALLOC];
  25 };
  26
  27 // === GLOBALS ===
  28  int    giAxWin3_LowestFreeWinID;
  29  int    giAxWin3_HighestUsedWinID;
  30 tWindowBlock    gAxWin3_WindowList;
  31
  32 // === CODE ===
  33 tWindow *AxWin3_int_CreateWindowStruct(uint32_t ServerID, int ExtraBytes)
  34 {
  35         tWindow *ret;
  36
  37         ret = calloc(sizeof(tWindow) + ExtraBytes, 1);
  38         ret->ServerID = ServerID;
  39
  40         return ret;
  41 }
  42
  43 tHWND AxWin3_CreateWindow(tHWND Parent, const char *Renderer, int Flags, int DataBytes, void **DataPtr)
  44 {
  45         tWindow *ret;
  46          int    newWinID;
  47          int    dataSize = sizeof(tIPCMsg_CreateWin) + strlen(Renderer) + 1;
  48         tAxWin_IPCMessage       *msg;
  49         tIPCMsg_CreateWin       *create_win;
  50
  51         // TODO: Validate `Parent`
  52
  53         // Allocate a window ID
  54         {
  55                  int    idx;
  56                 tWindowBlock *block, *prev;
  57                 block = &gAxWin3_WindowList;
  58                 newWinID = giAxWin3_LowestFreeWinID;
  59                 for( idx = 0; block; newWinID ++ )
  60                 {
  61                         if( block->Windows[idx] == NULL )
  62                                 break;
  63                         idx ++;
  64                         if(idx == WINDOWS_PER_ALLOC) {
  65                                 prev = block;
  66                                 block = block->Next;
  67                                 idx = 0;
  68                         }
  69                 }
  70
  71                 if( !block )
  72                 {
  73                         block = calloc(sizeof(tWindowBlock), 1);
  74                         prev->Next = block;
  75                         idx = 0;
  76                 }
  77
  78                 ret = block->Windows[idx] = AxWin3_int_CreateWindowStruct(newWinID, DataBytes);
  79
  80                 if(newWinID > giAxWin3_HighestUsedWinID)
  81                         giAxWin3_HighestUsedWinID = newWinID;
  82                 if(newWinID == giAxWin3_LowestFreeWinID)
  83                         giAxWin3_HighestUsedWinID ++;
  84         }
  85
  86         // Create message
  87         msg = AxWin3_int_AllocateIPCMessage(Parent, IPCMSG_CREATEWIN, 0, dataSize);
  88         create_win = (void*)msg->Data;
  89         create_win->NewWinID = newWinID;
  90         create_win->Flags = Flags;
  91         strcpy(create_win->Renderer, Renderer);
  92
  93         // Send and clean up
  94         AxWin3_int_SendIPCMessage(msg);
  95         free(msg);
  96
  97         // TODO: Detect errors in AxWin3_CreateWindow
  98
  99         // Return success
 100         if(DataPtr)     *DataPtr = ret->Data;
 101         return ret;
 102 }
 103
 104 void AxWin3_DestroyWindow(tHWND Window)
 105 {
 106 }