dlls/d3dx9_36/util.c

   1 /*
   2  * Copyright (C) 2009 Tony Wasserka
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  *
  18  */
  19
  20 #include "wine/debug.h"
  21 #include "d3dx9_36_private.h"
  22
  23 /************************************************************
  24  * map_view_of_file
  25  *
  26  * Loads a file into buffer and stores the number of read bytes in length.
  27  *
  28  * PARAMS
  29  *   filename [I] name of the file to be loaded
  30  *   buffer   [O] pointer to destination buffer
  31  *   length   [O] size of the obtained data
  32  *
  33  * RETURNS
  34  *   Success: D3D_OK
  35  *   Failure:
  36  *     see error codes for CreateFileW, GetFileSize, CreateFileMapping and MapViewOfFile
  37  *
  38  * NOTES
  39  *   The caller must UnmapViewOfFile when it doesn't need the data anymore
  40  *
  41  */
  42 HRESULT map_view_of_file(LPCWSTR filename, LPVOID *buffer, DWORD *length)
  43 {
  44     HANDLE hfile, hmapping = NULL;
  45
  46     hfile = CreateFileW(filename, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
  47     if(hfile == INVALID_HANDLE_VALUE) goto error;
  48
  49     *length = GetFileSize(hfile, NULL);
  50     if(*length == INVALID_FILE_SIZE) goto error;
  51
  52     hmapping = CreateFileMappingW(hfile, NULL, PAGE_READONLY, 0, 0, NULL);
  53     if(!hmapping) goto error;
  54
  55     *buffer = MapViewOfFile(hmapping, FILE_MAP_READ, 0, 0, 0);
  56     if(*buffer == NULL) goto error;
  57
  58     CloseHandle(hmapping);
  59     CloseHandle(hfile);
  60
  61     return S_OK;
  62
  63 error:
  64     CloseHandle(hmapping);
  65     CloseHandle(hfile);
  66     return HRESULT_FROM_WIN32(GetLastError());
  67 }
  68
  69 /************************************************************
  70  * load_resource_into_memory
  71  *
  72  * Loads a resource into buffer and stores the number of
  73  * read bytes in length.
  74  *
  75  * PARAMS
  76  *   module  [I] handle to the module
  77  *   resinfo [I] handle to the resource's information block
  78  *   buffer  [O] pointer to destination buffer
  79  *   length  [O] size of the obtained data
  80  *
  81  * RETURNS
  82  *   Success: D3D_OK
  83  *   Failure:
  84  *     See error codes for SizeofResource, LoadResource and LockResource
  85  *
  86  * NOTES
  87  *   The memory doesn't need to be freed by the caller manually
  88  *
  89  */
  90 HRESULT load_resource_into_memory(HMODULE module, HRSRC resinfo, LPVOID *buffer, DWORD *length)
  91 {
  92     HGLOBAL resource;
  93
  94     *length = SizeofResource(module, resinfo);
  95     if(*length == 0) return HRESULT_FROM_WIN32(GetLastError());
  96
  97     resource = LoadResource(module, resinfo);
  98     if( !resource ) return HRESULT_FROM_WIN32(GetLastError());
  99
 100     *buffer = LockResource(resource);
 101     if(*buffer == NULL) return HRESULT_FROM_WIN32(GetLastError());
 102
 103     return S_OK;
 104 }