rtwin.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: rtwin.cpp,v 1.1.2.1 2004/07/09 01:50:45 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (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.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * 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 ***** */

/////////////////////////////////////////////////////////////////////////////
//
// RTWIN.CPP
//
// Function:
//  BOOL OnPaint(TextWindow* pTextWindow, void* pDC, void* pPaintstruct,
//	    ULONG32 ulTimeOfCurrentDraw,
//	    BOOL SomeonesBeginOrEndTimeWasCrossedOverSinceLastDraw,
//	    INT16 xScrollWindowAmt, INT16 yScrollWindowAmt);
// Purpose:
//  This function does the actual rendering of text by doing a TextOut() of
//  all text in all TextContainers in the TextContainerList of pTextWindow
//  whose text is visible in the rectangle to be updated
//  This Function is called from WM_PAINT and hdc and ps are from
//  BeginPaint(); ps holds the invalid rectangle to be updated: 
// Returns:
//  Returns FALSE on error, TRUE otherwise. 
//
//
// Function:
//  BOOL PaintBackground(TextWindow* pTextWindow, void* pPaintstruct)
// Purpose:
//  This function paints the background of the window at the given rectangle
//  of pPaintstruct.
//  This Function is called from WM_PAINT, and pPaintstruct is (in Windows)
//  from  BeginPaint(); pPaintstruct holds the invalid rectangle to be
//  painted.
// Returns:
//  Returns FALSE on error, TRUE otherwise. 
//
//

#include "hxtypes.h" /*Must be included before windows.h for VC6 compiler*/

#if defined(_WINDOWS)
#include <windows.h>
#endif

#include "hxassert.h"

#include "hxstack.h"
#include "hxslist.h"

#include "rt_types.h" //for _CHAR, RED_GREEN_OR_BLUE, COLORTYPE

#include "fontdefs.h"
#include "txtattrb.h"
#include "txtcntnr.h"
#include "textline.h"
#include "atocolor.h"
#include "fontinfo.h" //for GetCharacterWidth().
#include "atotime.h" //for live time comparison: IsTimeAMoreRecentThanTimeB()

#include "chxxtype.h"
#include "txtwindw.h" //for class TextWindow.
#include "hxcom.h"
#include "hxvsurf.h"
#include "textprsr.h" /* for REAL_TEXT_TRANSPARENT_BGCOLOR_MAJOR_VERSION + ... */

// /#define USE_FREETYPE_DIRECTLY

#if defined (USE_FREETYPE_DIRECTLY)
#if defined(_WINDOWS)
#include "../textsvcs.h"
#elif defined(_MACINTOSH)
#include "textsvcs.h"
#endif
#endif /* END: USE_FREETYPE_DIRECTLY. */


#if defined(_WINDOWS)
#include "../rtwin.h"
#elif defined(_MACINTOSH)
#include "rtwin.h"
#endif

#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static char HX_THIS_FILE[] = __FILE__;
#endif

#if defined(_DEBUG)
// /#define XXXEH_TESTING_DATAURLPLAINTEXT_HANDLING2
#endif


COLORREF convertCOLORTYPEtoWinBGRColor(
	COLORTYPE RGBVal)
{
    COLORREF winColor = 0L;
    RED_GREEN_OR_BLUE red, green, blue;
    red = (RED_GREEN_OR_BLUE)(RGBVal>>16); //red is bytes 4,5
    green = (RED_GREEN_OR_BLUE)(RGBVal>>8); //green is 2,3
    blue = (RED_GREEN_OR_BLUE)RGBVal; //and blue is bytes 0,1
    winColor = (COLORREF)red | (COLORREF(green)<<8) | 
	    (COLORREF(blue)<<16); 
    return winColor;
}


/////////////////////////////////////////////////////////////////////////////
// Function:
//  BOOL
//  OnPaint
//  (
//	TextWindow* pTextWindow,
//	void* pDC,
//	void* pPaintstruct,
//	ULONG32 ulTimeOfCurrentDraw
//  )
//
// Purpose:
//  This function does the actual rendering of text by doing a TextOut() of
//  all text in all TextContainers in the TextContainerList of pTextWindow
//  whose text is visible in the rectangle to be updated
//  This Function is called from WM_PAINT and hdc and ps are from
//  BeginPaint(); ps holds the invalid rectangle to be updated: 
//
// Returns:
//  Returns FALSE on error, TRUE otherwise. 
//
BOOL OnPaint(TextWindow* pTextWindow, void* pVoid, void* pPaintstruct,
	ULONG32 ulTimeOfCurrentDraw,
	BOOL SomeonesBeginOrEndTimeWasCrossedOverSinceLastDraw,
	INT16 xScrollWindowAmt, INT16 yScrollWindowAmt)
{
    HX_ASSERT_VALID_PTR(pTextWindow);
    HX_ASSERT(pVoid);
    HX_ASSERT_VALID_PTR(pPaintstruct);
    if(!pTextWindow  ||  !pVoid  ||  !pPaintstruct
	    ||  !pTextWindow->m_hBitmap)
    {
	return FALSE;
    }

    // Initialize chromaKey flag. If the background
    // color is the same as the chroma key, then we 
    // know we are applying the chroma key. Also, when
    // we draw text of a certain color later down in
    // this method, we may be setting this flag, depending
    // on the text color.
    BOOL bChromaKeyWasApplied = FALSE;
    if (pTextWindow->isChromaKeySet())
    {
        if (DoesChromaKeyMatch(pTextWindow->getBackgroundColor(),
                               pTextWindow->getChromaKey(),
                               pTextWindow->getChromaKeyTolerance()))
        {
            if (pTextWindow->getChromaKeyOpacity() < 255)
            {
                bChromaKeyWasApplied = TRUE;
            }
        }
    }

    LONG32 lWindowWidth = pTextWindow->getWindowWidth();
    LONG32 lWindowHeight = pTextWindow->getWindowHeight();

    
    PAINTSTRUCT ps = *((PAINTSTRUCT*)pPaintstruct);
#if !defined(USE_DIB_SECTION)
    HBITMAP hbmpOld;
#endif
    BOOL b_FunctionSucceeded = TRUE;
    RECT updateRect = ps.rcPaint;
    //Due to window-offset-in-layout problem,
    // we need to translate the rect by the upperleftX,Y of pTextWindow:
    updateRect.left -= pTextWindow->getUpperLeftX();
    updateRect.top -= pTextWindow->getUpperLeftY();

    ULONG32 listSize = pTextWindow->textCntnrListSize();
    
    if(!pTextWindow->m_pDeviceContextMemory)
    {
	return FALSE;	
    }

    HDC	hDC = (HDC)pTextWindow->m_pDeviceContextMemory;

#if !defined(USE_DIB_SECTION)
    hbmpOld = (HBITMAP)SelectObject(hDC,
	    (HBITMAP)pTextWindow->m_pBmpCompat);
    if(!hbmpOld)
    {
	return FALSE;
    }
#endif

    BOOL bDoingScrollOfRect = FALSE;
    if(!SomeonesBeginOrEndTimeWasCrossedOverSinceLastDraw  &&
	    (xScrollWindowAmt>0  ||  yScrollWindowAmt>0)
	    //XXXEH- no CPU-friendly diagonal motion, yet, due to
	    // strange behavior in drawing in rtwin with lImageOffset
	    // not being calculated to take into account the extra
	    // width bytes:
	    &&  !(xScrollWindowAmt>0  &&  yScrollWindowAmt>0))
    {
#if defined(SCROLLINGVERSION_SCROLLDC)
	RECT rectScroll;
	RECT rectClip;
	rectScroll.left = 0;
	rectScroll.top = 0;
	rectScroll.right = lWindowWidth +
		(xScrollWindowAmt>0? lWindowWidth/2 : 0);
	//FONT_SIZE_PLUS4 is max height of new char, so no
	// need to scroll beyond since nothing will have been
	// drawn beyond yet:
	rectScroll.bottom = lWindowHeight + FONT_SIZE_PLUS4;
	rectClip.left = 0;
	rectClip.top = 0;
	rectClip.right = lWindowWidth +
		(xScrollWindowAmt>0? lWindowWidth/2 : 0);
	rectClip.bottom = lWindowHeight + FONT_SIZE_PLUS4;
	ScrollDC(hDC,
		-xScrollWindowAmt, -yScrollWindowAmt,
		&rectScroll, &rectClip, NULL, NULL);
#endif
	bDoingScrollOfRect = TRUE;
    }

#if defined(XXXEH_TESTING_DATAURLPLAINTEXT_HANDLING2)
FILE* f1 = ::fopen("c:\\LogDataURLhandling.txt", "a+");
::fprintf(f1, "Draw(), just before PaintBackground (listsize=%lu)\n", listSize);
::fclose(f1);
#endif

    if(!bDoingScrollOfRect  &&
	    !PaintBackground(pTextWindow, pPaintstruct))
    {
#if !defined(USE_DIB_SECTION)
	SelectObject(hDC, hbmpOld);
#endif
	return FALSE;
    }
    

#if defined (USE_FREETYPE_DIRECTLY)
/* XXXEH- moved the following block (up to "END XXXEH-0") for cross-plat use
 *  vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv *

    // /Moved this code up from under the below while loop so we can pass pBits
    // to ApplyTextOpacity() instead of doing the same code over and over
    // inside ApplyTextOpacity(); that'll make ApplyTextOpacity() be cross-
    // platform, as well (and it can be moved out so all plats can use it):
#if !defined(USE_DIB_SECTION)
    // retreive the bitmap handler
    HBITMAP hBM = (HBITMAP)SelectObject(hDC, hbmpOld);
#endif /* !USE_DIB_SECTION. */

    UCHAR*  pBits = NULL;
    LPBITMAPINFOHEADER pHeader = NULL;

    CHXxRect* pDestRect = (CHXxRect*)((HXxEvent*)pVoid)->param2;

    CHXxRect srcRect(0, 0, lWindowWidth, lWindowHeight);
    CHXxRect destRect;
    
    LONG32 lImageOffset = 0L;

    LONG32 lSavedHeaderHeight = -1;


#if !defined(USE_DIB_SECTION)
    // convert HBITMAP to DIB:
    if (pTextWindow->m_hDIB &&
	HXR_OK == pTextWindow->m_hDIB->GetDIBits(hDC, hBM, pBits, pHeader))
    {				    
#else //USE_DIB_SECTION:
    //we already have a DIB, so use it:
    if(pTextWindow->m_pBits)
    {
	pBits = (UCHAR*)(pTextWindow->m_pBits);
	pHeader = &(pTextWindow->m_BITMAPINFOHEADER);
#endif /* USE_ else !USE_ DIB_SECTION. */

#if defined(SCROLLINGVERSION_SCROLL_BY_MOVING_WINDOW)
	if(bDoingScrollOfRect)
	{
	    if(xScrollWindowAmt>0)
	    {
		srcRect.left += xScrollWindowAmt;
		srcRect.right += xScrollWindowAmt;
	    }
	    if(yScrollWindowAmt>0)
	    {
		//Note: we have to subtract, not add, because DIB's origin is
		// bottom left, not top left:
		srcRect.top += yScrollWindowAmt;
		srcRect.bottom += yScrollWindowAmt;
	    }
	}

	//Keep the offscreen height so we can reset it after doing the Blt():
	lSavedHeaderHeight = pHeader->biHeight;
	//If we're just using part of a larger offscreen area, then we need to
	// send an offset into the buffer that accounts for the extra vertical
	// lines of data (which, in Windows, byte 0 of the data is the first
	// byte of the LAST scan line, i.e., starts line # pBitmapInfo->biHeight):
	if(pHeader->biHeight != srcRect.Height())
	{
	    lImageOffset =
		    (pHeader->biHeight - srcRect.Height() - srcRect.top) *
		    (pHeader->biBitCount / 8) * pHeader->biWidth;
	    if(lImageOffset > 0L)
	    {
		if(srcRect.top != 0)
		    srcRect.bottom -= srcRect.top;
		srcRect.top = 0;
		pHeader->biHeight = srcRect.Height();
		pHeader->biSizeImage = WIDTHBYTES((pHeader->biWidth * 
			pHeader->biBitCount) * pHeader->biHeight);
	    }
	    else
	    {
		lImageOffset = 0L;
	    }
	}
#endif /* SCROLLINGVERSION_SCROLL_BY_MOVING_WINDOW. */

	if (pDestRect)
	{
	    destRect.SetRect(pDestRect->left, 
			     pDestRect->top, 
			     pDestRect->right,
			     pDestRect->bottom);
	}
	else
	{
	    destRect.SetRect(0,
			     0,
			     lWindowWidth, 
			     lWindowHeight);
	}

/* END XXXEH-0. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/
#endif /* USE_FREETYPE_DIRECTLY. */