Sweden-Number/dlls/d3dx9_36/util.c

155 lines
5.7 KiB
C

/*
* Copyright (C) 2009 Tony Wasserka
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
#include "wine/debug.h"
#include "d3dx9_36_private.h"
/************************************************************
* pixel format table providing info about number of bytes per pixel,
* number of bits per channel and format type.
*
* Call get_format_info to request information about a specific format.
*/
static const PixelFormatDesc formats[] =
{
/* format bits per channel shifts per channel bpp type */
{ D3DFMT_R8G8B8, { 0, 8, 8, 8 }, { 0, 16, 8, 0 }, 3, FORMAT_ARGB },
{ D3DFMT_A8R8G8B8, { 8, 8, 8, 8 }, { 24, 16, 8, 0 }, 4, FORMAT_ARGB },
{ D3DFMT_X8R8G8B8, { 0, 8, 8, 8 }, { 0, 16, 8, 0 }, 4, FORMAT_ARGB },
{ D3DFMT_A8B8G8R8, { 8, 8, 8, 8 }, { 24, 0, 8, 16 }, 4, FORMAT_ARGB },
{ D3DFMT_X8B8G8R8, { 0, 8, 8, 8 }, { 0, 0, 8, 16 }, 4, FORMAT_ARGB },
{ D3DFMT_R5G6B5, { 0, 5, 6, 5 }, { 0, 11, 5, 0 }, 2, FORMAT_ARGB },
{ D3DFMT_X1R5G5B5, { 0, 5, 5, 5 }, { 0, 10, 5, 0 }, 2, FORMAT_ARGB },
{ D3DFMT_A1R5G5B5, { 1, 5, 5, 5 }, { 15, 10, 5, 0 }, 2, FORMAT_ARGB },
{ D3DFMT_R3G3B2, { 0, 3, 3, 2 }, { 0, 5, 2, 0 }, 1, FORMAT_ARGB },
{ D3DFMT_A8R3G3B2, { 8, 3, 3, 2 }, { 8, 5, 2, 0 }, 2, FORMAT_ARGB },
{ D3DFMT_A4R4G4B4, { 4, 4, 4, 4 }, { 12, 8, 4, 0 }, 2, FORMAT_ARGB },
{ D3DFMT_X4R4G4B4, { 0, 4, 4, 4 }, { 0, 8, 4, 0 }, 2, FORMAT_ARGB },
{ D3DFMT_A2R10G10B10, { 2, 10, 10, 10 }, { 30, 20, 10, 0 }, 4, FORMAT_ARGB },
{ D3DFMT_A2B10G10R10, { 2, 10, 10, 10 }, { 30, 0, 10, 20 }, 4, FORMAT_ARGB },
{ D3DFMT_G16R16, { 0, 16, 16, 0 }, { 0, 0, 16, 0 }, 4, FORMAT_ARGB },
{ D3DFMT_A8, { 8, 0, 0, 0 }, { 0, 0, 0, 0 }, 1, FORMAT_ARGB },
{ D3DFMT_UNKNOWN, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }, 0, FORMAT_UNKNOWN }, /* marks last element */
};
/************************************************************
* map_view_of_file
*
* Loads a file into buffer and stores the number of read bytes in length.
*
* PARAMS
* filename [I] name of the file to be loaded
* buffer [O] pointer to destination buffer
* length [O] size of the obtained data
*
* RETURNS
* Success: D3D_OK
* Failure:
* see error codes for CreateFileW, GetFileSize, CreateFileMapping and MapViewOfFile
*
* NOTES
* The caller must UnmapViewOfFile when it doesn't need the data anymore
*
*/
HRESULT map_view_of_file(LPCWSTR filename, LPVOID *buffer, DWORD *length)
{
HANDLE hfile, hmapping = NULL;
hfile = CreateFileW(filename, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
if(hfile == INVALID_HANDLE_VALUE) goto error;
*length = GetFileSize(hfile, NULL);
if(*length == INVALID_FILE_SIZE) goto error;
hmapping = CreateFileMappingW(hfile, NULL, PAGE_READONLY, 0, 0, NULL);
if(!hmapping) goto error;
*buffer = MapViewOfFile(hmapping, FILE_MAP_READ, 0, 0, 0);
if(*buffer == NULL) goto error;
CloseHandle(hmapping);
CloseHandle(hfile);
return S_OK;
error:
CloseHandle(hmapping);
CloseHandle(hfile);
return HRESULT_FROM_WIN32(GetLastError());
}
/************************************************************
* load_resource_into_memory
*
* Loads a resource into buffer and stores the number of
* read bytes in length.
*
* PARAMS
* module [I] handle to the module
* resinfo [I] handle to the resource's information block
* buffer [O] pointer to destination buffer
* length [O] size of the obtained data
*
* RETURNS
* Success: D3D_OK
* Failure:
* See error codes for SizeofResource, LoadResource and LockResource
*
* NOTES
* The memory doesn't need to be freed by the caller manually
*
*/
HRESULT load_resource_into_memory(HMODULE module, HRSRC resinfo, LPVOID *buffer, DWORD *length)
{
HGLOBAL resource;
*length = SizeofResource(module, resinfo);
if(*length == 0) return HRESULT_FROM_WIN32(GetLastError());
resource = LoadResource(module, resinfo);
if( !resource ) return HRESULT_FROM_WIN32(GetLastError());
*buffer = LockResource(resource);
if(*buffer == NULL) return HRESULT_FROM_WIN32(GetLastError());
return S_OK;
}
/************************************************************
* get_format_info
*
* Returns information about the specified format.
* If the format is unsupported, it's filled with the D3DFMT_UNKNOWN desc.
*
* PARAMS
* format [I] format whose description is queried
* desc [O] pointer to a StaticPixelFormatDesc structure
*
*/
const PixelFormatDesc *get_format_info(D3DFORMAT format)
{
unsigned int i = 0;
while(formats[i].format != format && formats[i].format != D3DFMT_UNKNOWN) i++;
return &formats[i];
}