rtwin.cpp

linux下的一款播放器

		}
		//Do underlining manually now (due to
		// possible gaps if alternate font has to be
		// used and forced spacing is not quite as os
		// calculates it):
		if(pContainer->isUnderlined())
		{
		    INT32 thickness =
			    (yLowerRightScaled - yScaled) / 12;
		    if(thickness < 1)
		    {
			thickness = 1;
		    }
		    if(pContainer->isBold())
		    {
			thickness += (thickness/2);
		    }

		    XLockDisplay(pDisplay);
		    XSetForeground(pDisplay, gc, xcolor.pixel);
		    XSetBackground(pDisplay, gc, 0); 		    //XXXEH-Is this needed?:

		    
		    XFillRectangle(pDisplay, pixmap, gc,
			    xScaled,
			    yLowerRightScaled - thickness + 1,
			    lScaledLowerRightXWithOffsets-xScaled + 
				   (ULONG32) fXScaleFactor,
			    thickness);
		    XUnlockDisplay(pDisplay);
		}
		//Do strike-through manually now (due to
		// possible gaps if alternate font has to be
		// used and forced spacing is not quite as os
		// calculates it):
		if(pContainer->isStruckOut())
		{
		    INT32 thickness =
			    (yLowerRightScaled - yScaled) / 18;
		    if(thickness < 1)
		    {
			thickness = 1;
		    }

		    XLockDisplay(pDisplay);
		    XSetForeground(pDisplay, gc, xcolor.pixel);
		    XSetBackground(pDisplay, gc, 0);		    //XXXEH-Is this needed?:


		    XFillRectangle(pDisplay, pixmap, gc,
			    xScaled,
			    yScaled + ((yLowerRightScaled - yScaled) / 2),
			    lScaledLowerRightXWithOffsets-xScaled + 
				   (ULONG32) fXScaleFactor,
			    thickness);
		    XUnlockDisplay(pDisplay);
		}
	    }

	    char* textbuffer=pContainer->getBuffer();
	    char buf[3]; /* Flawfinder: ignore */  //[0] holds char to be drawn (or [0] and
				// [1] do if DBCS), and [1] (or [2] if 
				// 2-byte char) holds '\0';
	    buf[1] = buf[2] = '\0';
	    INT16 bufLen = 0;

	    if (textbuffer && pContainer->getTextLengthPlus1() < 1)
	    {
		continue; // while (pos)
            }
	
	    ULONG32 ulCharset = pContainer->getFontCharset();
	    LONG32 cx = xScaled;
	    LONG32 cy = yScaled + fs->ascent - 2;

	    XLockDisplay(pDisplay);
	    XSetForeground(pDisplay, gc, xcolor.pixel);
	    XUnlockDisplay(pDisplay);

	    // draw each character @ offset in x from the first:
	    do
	    {
		char ch = *textbuffer;
		UINT16 usCh = ch;
		buf[0] = ch;
		bufLen = 1;
		if (IS_MULTI_BYTE_CHARSET(ulCharset))
		{
		    if (IS_UNICODE_CHARSET(ulCharset) ||
			(UCHAR)ch >= DBCS_MIN_LEAD_BYTE_VAL)
		    {
		       // ch is lead byte of a 2-byte char.
			textbuffer++;
			ch = *textbuffer;
			bufLen = 2; //is a 2-byte char.
			buf[1] = ch; //==trail byte.
			usCh <<= 8; //move lead byte into high byte.
			usCh |= ch; //put trail byte into low byte.
		    }
		}
		//XXXEH- test this DBCS stuff^^!!!

		ULONG32 ulLookupCharWidth = GET_CHAR_WIDTH(pContainer, usCh);
		if(bWindowWidthIsNotTheOriginalValue)
		{
		    ulLookupCharWidth =
			    LONG32(((float)ulLookupCharWidth *
			    (float)lWindowWidth) /
			    (float)pTextWindow->getWidth());
		}

		//First, horizontally center the character inside
		// its bounding box in case its native width is
		// noticably different from its cross-platform-
		// table-assigned width:
		LONG32 lXPlatWidth = (LONG32)ulLookupCharWidth;
		LONG32 lNativeWidth = (bufLen>1?
			//use fixed x-plat width for double byte chars:
			lXPlatWidth:
			(LONG32)XTextWidth(  fs, buf, 1) );

		LONG32 lCrossPlatVsNativeWidthOffset = 0L;
		if(lNativeWidth  &&  //Should never be 0, but...
			lXPlatWidth!=lNativeWidth) 
		{
		    //Note: we should not adjust lNativeWidth by any
		    // scale factor even if bWindowWidthIsNotTheOriginalValue
		    // because that's already been accounted for in the font
		    // point size.

		    //Note: this can be negative!:
		    lCrossPlatVsNativeWidthOffset =
			    (lXPlatWidth-lNativeWidth)/2;
		}

		XDrawString(pDisplay, pixmap, gc,
			cx + lCrossPlatVsNativeWidthOffset,
			cy,
			buf, bufLen);

		cx += ulLookupCharWidth;

	    } while(*(++textbuffer));

	    pContainer->textHasChangedSinceLastDraw(FALSE);

	    //Since OnTimeSync()/OnTimeSynch() may not yet have been
	    //called, we need to time-bounds check:

	} // if (pContainer->textHasChangedSinceLastDraw())
    } // while(pos)

    if (bFreeColors)
    {
	UINT32 colors[1];
	colors[0] = xcolor.pixel;
    }

    XLockDisplay(pDisplay);
    XFreeGC(pDisplay, gc);
    XUnlockDisplay(pDisplay);

    // now blt this information to the screen

    IHXVideoSurface* pVideoSurface = (IHXVideoSurface*)pEvent->param1;
    
    HX_ASSERT(NULL != pVideoSurface);
    if(NULL == pVideoSurface)
    {
	return FALSE; //no draw.
    }

    pVideoSurface->AddRef();

    //avoid race condition when re-allocating offscreen bitmap:
    // TODO: if (!pTextWindow->m_bHandlingWindowResizing)
	LONG32 w, h;

	w = pTextWindow->getWindowWidth();
 	h = pTextWindow->getWindowHeight();

	XLockDisplay(pDisplay);
	XImage *pImage = XGetImage(pDisplay, pixmap,
		0, 0, w, h,
		AllPlanes,
		ZPixmap);
	XUnlockDisplay(pDisplay);

	CHXxRect destRect, srcRect;
	destRect.SetRect(0, 0, w, h);
	srcRect.SetRect(0, 0, w, h);
        pEvent->result = pVideoSurface->Blt(
		    (UCHAR *)pImage->data,
		    pBitmapInfoHeader,
		    destRect, 
		    srcRect);

        XDestroyImage(pImage);
	
    HX_RELEASE(pVideoSurface);
	
    return TRUE;
}


/////////////////////////////////////////////////////////////////////////////
// Function:
//  BOOL
//  PaintBackground
//  (
//  	TextWindow* pTextWindow,
//      Display*    pDisplay,
//      Colormap    cmap,
//      Pixmap      pixmap
//  )
//
// Purpose:
//  This function paints the background of the window
//

static void
PaintBackground(TextWindow* pTextWindow, Display* pDisplay, Colormap cmap, Pixmap pixmap)
{
    XColor bgColor;
    convertCOLORTYPEtoXVisualFormat(pTextWindow->getBackgroundColor(),
				    bgColor);

    // get color
    HXFindBestXColor(pDisplay, cmap, &bgColor);

    XGCValues gcv;
    gcv.background = 0;
    gcv.foreground = bgColor.pixel;
    XLockDisplay(pDisplay);
    GC gc = XCreateGC(pDisplay, pixmap, GCForeground | GCBackground, &gcv);

    XFillRectangle(pDisplay, pixmap, gc,
		   0, 0,
		   // Note: this used to use getWidth and getHeight
		   pTextWindow->getWindowWidth(),
		   pTextWindow->getWindowHeight());
    XUnlockDisplay(pDisplay);

    UINT32 colors[1];
    colors[0] = bgColor.pixel;

    // TODO: save and reuse this GC?
    XLockDisplay(pDisplay);
    XFreeGC(pDisplay, gc);
    XUnlockDisplay(pDisplay);

    return;
}

// TODO KPW: this code really should use the resource database
// to allow users to specify a particular fontSpec for 
// each face

static struct { const char *face; const char *family; } fontMap[] = {
    { "[default]", "times" }, // default if no map found, must be first
    { "times", "times" },
    { "courier", "courier" },
    { "courier new", "courier" },
    { "arial", "helvetica" },
    { "arial black", "helvetica" },
    { "arial narrow", "helvetica" },
    { "arial rounded MT bold", "helvetica" },
    { "helvetica", "helvetica" },
    { NULL, NULL }
};
/*  XXXEH: all recognized font names in RT should be added
    to the above struct once the appropriate "backup" font face has been
    determined. */

static const char*
MapFaceToFamily(const char *face)
{
   register int i;

   for (i = 0; NULL != face   &&  fontMap[i].face != NULL; i++)
   {
       if (strcasecmp(face, fontMap[i].face) == 0)
       {
	   return(fontMap[i].family);
       }
   }

   // return the default
   return(fontMap[0].family);
}

// Note: this may return NULL

static XFontStruct*
GetFontStruct(Display *pDisplay, TextWindow* pTextWindow,
	      TextContainer* pContainer,
	      float fYScaleFactor)
{
    if (!pTextWindow)
    {
	return NULL;
    }

    Dict* pDict = pTextWindow->m_font_dict;
    char fontSpec[1024]; /* Flawfinder: ignore */
    const char* pFontFamily = NULL;
    const char* pAlternateFontFamily = NULL;
    XFontStruct* fs = NULL;

    pFontFamily = pContainer->getFontFaceString(
	    pTextWindow->getMajorContentVersion(),
	    pTextWindow->getMinorContentVersion());

    pAlternateFontFamily = MapFaceToFamily(
	    pContainer->getFontFaceString(
	    pTextWindow->getMajorContentVersion(),
	    pTextWindow->getMinorContentVersion()));

    ULONG32 ulCharset = pContainer->getFontCharset();

    //XXXEH: this is a half-*ssed attempt to support CJK fonts.  This will
    // do at least as good a job as prior code (that rendered all CJK chars
    // using Latin-1 characters, i.e, it was unreadable):
    if (IS_MULTI_BYTE_CHARSET(ulCharset))
    {
	sprintf(fontSpec, "-*-%s-%s-%s-*--%ld-*-75-75-*-*-*-%s", /* Flawfinder: ignore */
		//ignore face name in this build; just load any available
		// font in this charset
		"fixed",
		pContainer->isBold() ? "bold" : "medium",
		pContainer->isItalicized() ? "i" : "r",
		(INT32)(pContainer->getFontPointSize() * fYScaleFactor),
		(ulCharset & HX_JAPANESE_CHARSET?"jisx0208.1990-0":
			(ulCharset & HX_KOREAN_CHARSET?
// /XXXEH- for plain text, we need to use this only if user specified
// "ksc5601" or "hangeul" charset, but not "johab"; need to find out what to
// use for "johab":
				"KSC5601.1987-0": 
				(HX_CHINESE_CHARSET?
				//XXXEH: CNSxxx is Taiwan charset but most
				// likely doesn't map exactly to big5; need
				// more research to find big5 charset:
					(ulCharset==CHARSET__big5?
// /XXXEH- Doh!!: I think these are backwards; we need to fix this, however,
// only for plain text and (maybe) for new RealText version:
					 "GB2312.1980-0":"CNS11643.1986-1"):
					"*" /*:load whatever if not CJK.*/
				)
			)
		) );
    }
    else
    {
	sprintf(fontSpec, "-*-%s-%s-%s-*--%ld-*-75-75-*-*-*-*", /* Flawfinder: ignore */
		pFontFamily,
		pContainer->isBold() ? "bold" : "medium",
		pContainer->isItalicized() ? "i" : "r",
		(INT32)(pContainer->getFontPointSize() * fYScaleFactor));
    }

    Dict_entry* ent = pDict->find(fontSpec);
    if (ent)
    {
	fs = (XFontStruct*)ent->obj;
    }
    else
    {
	XLockDisplay(pDisplay);
	fs = XLoadQueryFont(pDisplay, fontSpec);
	XUnlockDisplay(pDisplay);

	if (fs)
	{
	    pDict->enter(fontSpec, fs);
	}
	else if(!IS_MULTI_BYTE_CHARSET(ulCharset))
	{
	    // /Helps minimize effect of PR 33172:
	    // We want to put the originally-requested font spec
	    // into the dictionary with the XFontStruct of the *alternate*
	    // one so that, next time we try to load the same font spec,
	    // we end up getting the alternate one out of the dict.
	    // (The true fix for PR 33172 is to delete the entries in the
	    // dict prior to deleting the dict);
	    char szAlternateFontSpec[1024]; /* Flawfinder: ignore */
	    sprintf(szAlternateFontSpec, "-*-%s-%s-%s-*--%ld-*-75-75-*-*-*-*", /* Flawfinder: ignore */
		    pAlternateFontFamily,
		    pContainer->isBold() ? "bold" : "medium",
		    pContainer->isItalicized() ? "i" : "r",
		    (INT32)(pContainer->getFontPointSize() * fYScaleFactor));
	    XLockDisplay(pDisplay);
	    fs = XLoadQueryFont(pDisplay, szAlternateFontSpec);
	    XUnlockDisplay(pDisplay);
	    if (fs)
	    {
		pDict->enter(fontSpec, fs);
	    }
	}
    }

    // if it's not in the dict and we couldn't load it substitute either
    // "times". "helvetica", or "courier", depending on the font face's
    // RT-defined "spacing" similarities to one of those font faces.
    // XXXEH: note: if a CJK (DBCS) charset is specified and the load query
    // font failed for the given point size, that doesn't mean it would
    // for sure fail at other point sizes, so we need to special case those
    // and maintain the charsets when for-looping through the point size
    // queries:
    int ulFontPointSize = pContainer->getFontPointSize() -1;
    INT32 lScaledHeight = (INT32)((float)ulFontPointSize * fYScaleFactor);
    while (!fs && lScaledHeight >= 8 )
    {
	ULONG32 ulFontFaceIndex = pContainer->getFontFace(); 
         sprintf(fontSpec, "-*-%s-%s-%s-*--%ld-*-75-75-*-*-*-*", /* Flawfinder: ignore */
		(ulFontFaceIndex&USES_COURIER_SPACING?"courier":
		    (ulFontFaceIndex&USES_ARIAL_SPACING?"helvetica":
			"times")),
		"medium", "r",  lScaledHeight);

	 Dict_entry* ent = pDict->find(fontSpec);
	 if (ent)
	 {
	     fs = (XFontStruct*)ent->obj;
	 }
	 else
	 {
	     XLockDisplay(pDisplay);
	     fs = XLoadQueryFont(pDisplay, fontSpec);
	     XUnlockDisplay(pDisplay);
	     if (fs)
	       pDict->enter(fontSpec, fs);
	 }

	 lScaledHeight--;
    }

    return fs;
}
#endif /* _BEOS */