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 /************************************************************
  25  * pixel format table providing info about number of bytes per pixel,
  26  * number of bits per channel and format type.
  27  *
  28  * Call get_format_info to request information about a specific format.
  29  */
  30 static const PixelFormatDesc formats[] =
  31 {
  32    /* format                    bits per channel        shifts per channel   bpp   type        */
  33     { D3DFMT_R8G8B8,          {  0,   8,   8,   8 },  {  0,  16,   8,   0 },   3,  FORMAT_ARGB },
  34     { D3DFMT_A8R8G8B8,        {  8,   8,   8,   8 },  { 24,  16,   8,   0 },   4,  FORMAT_ARGB },
  35     { D3DFMT_X8R8G8B8,        {  0,   8,   8,   8 },  {  0,  16,   8,   0 },   4,  FORMAT_ARGB },
  36     { D3DFMT_A8B8G8R8,        {  8,   8,   8,   8 },  { 24,   0,   8,  16 },   4,  FORMAT_ARGB },
  37     { D3DFMT_X8B8G8R8,        {  0,   8,   8,   8 },  {  0,   0,   8,  16 },   4,  FORMAT_ARGB },
  38     { D3DFMT_R5G6B5,          {  0,   5,   6,   5 },  {  0,  11,   5,   0 },   2,  FORMAT_ARGB },
  39     { D3DFMT_X1R5G5B5,        {  0,   5,   5,   5 },  {  0,  10,   5,   0 },   2,  FORMAT_ARGB },
  40     { D3DFMT_A1R5G5B5,        {  1,   5,   5,   5 },  { 15,  10,   5,   0 },   2,  FORMAT_ARGB },
  41     { D3DFMT_R3G3B2,          {  0,   3,   3,   2 },  {  0,   5,   2,   0 },   1,  FORMAT_ARGB },
  42     { D3DFMT_A8R3G3B2,        {  8,   3,   3,   2 },  {  8,   5,   2,   0 },   2,  FORMAT_ARGB },
  43     { D3DFMT_A4R4G4B4,        {  4,   4,   4,   4 },  { 12,   8,   4,   0 },   2,  FORMAT_ARGB },
  44     { D3DFMT_X4R4G4B4,        {  0,   4,   4,   4 },  {  0,   8,   4,   0 },   2,  FORMAT_ARGB },
  45     { D3DFMT_A2R10G10B10,     {  2,  10,  10,  10 },  { 30,  20,  10,   0 },   4,  FORMAT_ARGB },
  46     { D3DFMT_A2B10G10R10,     {  2,  10,  10,  10 },  { 30,   0,  10,  20 },   4,  FORMAT_ARGB },
  47     { D3DFMT_G16R16,          {  0,  16,  16,   0 },  {  0,   0,  16,   0 },   4,  FORMAT_ARGB },
  48     { D3DFMT_A8,              {  8,   0,   0,   0 },  {  0,   0,   0,   0 },   1,  FORMAT_ARGB },
  49
  50     { D3DFMT_UNKNOWN,         {  0,   0,   0,   0 },  {  0,   0,   0,   0 },   0,  FORMAT_UNKNOWN }, /* marks last element */
  51 };
  52
  53
  54 /************************************************************
  55  * map_view_of_file
  56  *
  57  * Loads a file into buffer and stores the number of read bytes in length.
  58  *
  59  * PARAMS
  60  *   filename [I] name of the file to be loaded
  61  *   buffer   [O] pointer to destination buffer
  62  *   length   [O] size of the obtained data
  63  *
  64  * RETURNS
  65  *   Success: D3D_OK
  66  *   Failure:
  67  *     see error codes for CreateFileW, GetFileSize, CreateFileMapping and MapViewOfFile
  68  *
  69  * NOTES
  70  *   The caller must UnmapViewOfFile when it doesn't need the data anymore
  71  *
  72  */
  73 HRESULT map_view_of_file(LPCWSTR filename, LPVOID *buffer, DWORD *length)
  74 {
  75     HANDLE hfile, hmapping = NULL;
  76
  77     hfile = CreateFileW(filename, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
  78     if(hfile == INVALID_HANDLE_VALUE) goto error;
  79
  80     *length = GetFileSize(hfile, NULL);
  81     if(*length == INVALID_FILE_SIZE) goto error;
  82
  83     hmapping = CreateFileMappingW(hfile, NULL, PAGE_READONLY, 0, 0, NULL);
  84     if(!hmapping) goto error;
  85
  86     *buffer = MapViewOfFile(hmapping, FILE_MAP_READ, 0, 0, 0);
  87     if(*buffer == NULL) goto error;
  88
  89     CloseHandle(hmapping);
  90     CloseHandle(hfile);
  91
  92     return S_OK;
  93
  94 error:
  95     CloseHandle(hmapping);
  96     CloseHandle(hfile);
  97     return HRESULT_FROM_WIN32(GetLastError());
  98 }
  99
 100 /************************************************************
 101  * load_resource_into_memory
 102  *
 103  * Loads a resource into buffer and stores the number of
 104  * read bytes in length.
 105  *
 106  * PARAMS
 107  *   module  [I] handle to the module
 108  *   resinfo [I] handle to the resource's information block
 109  *   buffer  [O] pointer to destination buffer
 110  *   length  [O] size of the obtained data
 111  *
 112  * RETURNS
 113  *   Success: D3D_OK
 114  *   Failure:
 115  *     See error codes for SizeofResource, LoadResource and LockResource
 116  *
 117  * NOTES
 118  *   The memory doesn't need to be freed by the caller manually
 119  *
 120  */
 121 HRESULT load_resource_into_memory(HMODULE module, HRSRC resinfo, LPVOID *buffer, DWORD *length)
 122 {
 123     HGLOBAL resource;
 124
 125     *length = SizeofResource(module, resinfo);
 126     if(*length == 0) return HRESULT_FROM_WIN32(GetLastError());
 127
 128     resource = LoadResource(module, resinfo);
 129     if( !resource ) return HRESULT_FROM_WIN32(GetLastError());
 130
 131     *buffer = LockResource(resource);
 132     if(*buffer == NULL) return HRESULT_FROM_WIN32(GetLastError());
 133
 134     return S_OK;
 135 }
 136
 137
 138 /************************************************************
 139  * get_format_info
 140  *
 141  * Returns information about the specified format.
 142  * If the format is unsupported, it's filled with the D3DFMT_UNKNOWN desc.
 143  *
 144  * PARAMS
 145  *   format [I] format whose description is queried
 146  *   desc   [O] pointer to a StaticPixelFormatDesc structure
 147  *
 148  */
 149 const PixelFormatDesc *get_format_info(D3DFORMAT format)
 150 {
 151     unsigned int i = 0;
 152     while(formats[i].format != format && formats[i].format != D3DFMT_UNKNOWN) i++;
 153     return &formats[i];
 154 }