minifmt.cpp
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxcom.h"
- #include "hlxclib/string.h"
- #include "hxtypes.h"
- #include "hxwintyp.h"
- #include "hxvsurf.h"
- #include "ciddefs.h"
- #include "minifmt.h"
- #define _FOURCC 1
- #define _BITCOUNT 2
- #define _BITMASK 4
- CFmtObj::CFmtObj()
- : m_pFmtList(NULL)
- {
- CreateFmtList();
- }
- CFmtObj::~CFmtObj()
- {
- DestroyFmtList();
- }
- int CFmtObj::MakeBitmap(HXBitmapInfo* lpbi,
- int nBISize, int cid,
- ULONG32 dwWidth, ULONG32 dwHeight,
- void* lppe, int nColors)
- {
- int setPalette, bitmapinfoSize;
- // check input parameters
- if (!lpbi ||
- (int)dwWidth <= 0 || (int)dwHeight <= 0 ||
- !m_pFmtList)
- return 0;
- memset( lpbi, 0, sizeof(*lpbi) );
-
- // find entry
- FmtEntry* p = FindEntry(cid);
- if (!p)
- return 0;
- // calculate bitmapinfo size
- setPalette = 0;
- bitmapinfoSize = sizeof(HXBitmapInfoHeader);
- if (p->dwFlags & _BITMASK)
- {
- bitmapinfoSize += 3 * sizeof(ULONG32);
- }
- else if ((p->dwFlags & (_FOURCC|_BITCOUNT)) == (_FOURCC|_BITCOUNT) &&
- p->dwFourCC == BI_RGB && p->dwBitCount <= 8 &&
- nColors)
- {
- // check palette parameters
- if (lppe == NULL || nColors < 0 || nColors > 256)
- return 0;
- #ifdef _WIN32
- bitmapinfoSize += nColors * sizeof(PALETTEENTRY);
- setPalette = 1;
- #endif
- }
- // check if we have sufficient amount of memory
- if (nBISize < bitmapinfoSize)
- return 0;
- // initialize bitmapinfo structure
- memset(lpbi, 0, bitmapinfoSize);
- lpbi->bmiHeader.biSize = sizeof(HXBitmapInfoHeader);
- // set image parameters
- lpbi->bmiHeader.biWidth = dwWidth;
- lpbi->bmiHeader.biHeight = dwHeight;
- lpbi->bmiHeader.biPlanes = 1;
- lpbi->bmiHeader.biSizeImage = ImageSize (cid, dwWidth, dwHeight);
- // set color format
- SetBitmapColor (lpbi, cid);
- #ifdef _WIN32
- /* set palette: */
- // if (setPalette)
- // SetBitmapPalette (lpbi, lppe, nColors);
- #endif
-
- return bitmapinfoSize; /* the number of bytes written */
- }
- int CFmtObj::SetBitmapColor(HXBitmapInfo* lpHXbi, int cid)
- {
- // check input parameters
- if (!lpHXbi || !m_pFmtList)
- return -1;
- // find entry
- FmtEntry* p = FindEntry(cid);
- if (!p)
- return -1;
- // set color-format releated fields in BITMAPINFO
- lpHXbi->bmiHeader.biCompression = p->dwFourCC;
- lpHXbi->bmiHeader.biBitCount = (UINT16)p->dwBitCount;
- // set color masks
- if (p->dwFlags & _BITMASK)
- {
- // get offset of color masks in the bitmap
- ULONG32 *lpColors = (ULONG32*)&lpHXbi->un.dwBitMask[0];
- lpColors[0] = p->dwBitMask[0];
- lpColors[1] = p->dwBitMask[1];
- lpColors[2] = p->dwBitMask[2];
- }
- return 0;
- }
- int CFmtObj::ImageSize (int cid, ULONG32 dwWidth, ULONG32 dwHeight)
- {
- FmtEntry* p = FindEntry(cid);
- if (!p)
- return 0;
-
- int pitch = dwWidth * p->dwBitCount / 8;
- if (p->dwFlags & _BITCOUNT)
- pitch = (pitch + 3) & ~3;
- return dwHeight * pitch;
- }
- int CFmtObj::GetBitmapPitch (HXBitmapInfo* lpbi)
- {
- register int cid, pitch;
- // check bitmap pointer & format
- cid = GetBitmapColor (lpbi);
-
- if (cid == -1)
- return 0;
- if (cid == CID_XING)
- return 768;
-
- // find entry
- FmtEntry* p = FindEntry(cid);
- if (!p)
- return 0;
-
- // calculate image pitch
- pitch = lpbi->bmiHeader.biWidth * p->nBPP;
-
- if (cid == BI_RGB || cid == BI_BITFIELDS)
- #if defined(_MACINTOSH) || defined(_UNIX)
- pitch = ((pitch + 3) & ~3);
- #else
- pitch = -((pitch + 3) & ~3);
- #endif
- // return pitch
- return pitch;
- }
- int CFmtObj::GetBitmapColor(HXBitmapInfo* lpHXbi)
- {
- int cid = -1;
- // check bitmap pointer/size
- if (lpHXbi == NULL)
- return CID_UNKNOWN;
- // get bitmap parameters to compare
- for (FmtEntry* p=m_pFmtList; p; p=p->pNext)
- {
- if (ChkColor (p,
- lpHXbi->bmiHeader.biCompression,
- lpHXbi->bmiHeader.biBitCount,
- (ULONG32*)&lpHXbi->un.dwBitMask[0]))
- {
- cid = p->cid;
- break;
- }
- }
-
- return cid;
- }
- int CFmtObj::ChkColor (FmtEntry* p,
- ULONG32 dwFourCC,
- ULONG32 dwBitCount,
- ULONG32 *lpBitMask)
- {
- // clear match flags
- ULONG32 dwMatch = 0;
- // check FourCC
- if ((p->dwFlags & _FOURCC) && p->dwFourCC == dwFourCC)
- dwMatch |= _FOURCC;
- // check BitCount
- if ((p->dwFlags & _BITCOUNT) && p->dwBitCount == dwBitCount)
- dwMatch |= _BITCOUNT;
- // check BitMasks
- if ((p->dwFlags & _BITMASK) && lpBitMask &&
- p->dwBitMask[0] == lpBitMask[0] &&
- p->dwBitMask[1] == lpBitMask[1] &&
- p->dwBitMask[2] == lpBitMask[2])
- dwMatch |= _BITMASK;
- // combine results
- return dwMatch == p->dwFlags;
- }
- void CFmtObj::CreateFmtList()
- {
- CreateFmtEntry( _FOURCC, MAKEFOURCC('I','4','2','0'), CID_I420, 12, 1);
- CreateFmtEntry( _FOURCC, MAKEFOURCC('Y', 'V', '1', '2'), CID_YV12, 12, 1);
- CreateFmtEntry( _FOURCC, MAKEFOURCC('Y','U','Y','2'), CID_YUY2, 16, 2);
- CreateFmtEntry( _FOURCC, MAKEFOURCC('U', 'Y', 'V', 'Y'), CID_UYVY, 16, 2);
-
- CreateFmtEntry( _FOURCC+_BITCOUNT, BI_RGB, CID_RGB32, 32, 4);
- CreateFmtEntry( _FOURCC+_BITCOUNT, HX_ARGB, CID_ARGB32, 32, 4);
- CreateFmtEntry( _FOURCC+_BITCOUNT, BI_RGB, CID_RGB24, 24, 3);
- CreateFmtEntry( _FOURCC+_BITCOUNT, BI_RGB, CID_RGB444, 12, 2);
-
- CreateFmtEntry( _FOURCC+_BITCOUNT+_BITMASK,BI_BITFIELDS, CID_RGB565, 16, 2, 0xF800,0x07E0,0x001F);
- CreateFmtEntry( _FOURCC+_BITCOUNT+_BITMASK,BI_BITFIELDS, CID_RGB555, 16, 2, 0x7C00,0x03E0,0x001F);
- CreateFmtEntry( _FOURCC+_BITCOUNT+_BITMASK,BI_BITFIELDS, CID_RGB444, 16, 2, 0x0F00,0x00F0,0x000F);
-
- }
- void CFmtObj::DestroyFmtList()
- {
- if (!m_pFmtList)
- return;
- for (FmtEntry* p=m_pFmtList; p; m_pFmtList=p)
- {
- p = p->pNext;
- delete m_pFmtList;
- }
- }
- FmtEntry* CFmtObj::CreateFmtEntry( ULONG32 dwFlags,
- ULONG32 dwFourCC,
- int cid,
- ULONG32 dwBitCount,
- ULONG32 nBPP,
- ULONG32 dwBitMask1,
- ULONG32 dwBitMask2,
- ULONG32 dwBitMask3
- )
- {
- FmtEntry* pEntry = new FmtEntry;
-
- if (pEntry)
- {
- memset(pEntry, 0, sizeof(*pEntry));
- if (!m_pFmtList)
- m_pFmtList = pEntry;
- else
- {
- FmtEntry* p;
- for (p=m_pFmtList; p->pNext; p=p->pNext)
- ;
- p->pNext = pEntry;
- }
- }
- pEntry->dwFlags = dwFlags;
- pEntry->dwFourCC = dwFourCC;
- pEntry->cid = cid;
- pEntry->dwBitCount = dwBitCount;
- pEntry->nBPP = nBPP;
- pEntry->dwBitMask[0] = dwBitMask1;
- pEntry->dwBitMask[1] = dwBitMask2;
- pEntry->dwBitMask[2] = dwBitMask3;
-
- return pEntry;
- }
- FmtEntry* CFmtObj::FindEntry(int cid)
- {
- FmtEntry* p;
- for (p=m_pFmtList; p && p->cid != cid; p=p->pNext)
- ;
-
- return p;
- }