sitetext.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: sitetext.cpp,v 1.3.20.1 2004/07/09 01:59:02 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 ***** */

#include "hxcom.h"
#include "hxtypes.h"
#include "hxwintyp.h"
#include "hxmap.h"
#include "hxslist.h"
#include "ihxpckts.h"
#include "hxwin.h"
#include "hxengin.h"
#include "hxsite2.h"
#include "chxxtype.h"
#include "hxvctrl.h"
#include "hxvsurf.h"
#include "hxcodec.h"
#include "surface.h"
#include "vidosurf.h"
#include "chxpckts.h"
#include "hxevent.h"
#include "sitetext.h"
#include "platform/mac/hx_moreprocesses.h"

#define DEF_TEXT_HEIGHT		12
#define POINTS_TO_PIXELS	1.5
#define DEF_TEXT_GUTTER		1.2
#define DEF_STAT_HEIGHT		(int)((double)DEF_TEXT_HEIGHT * POINTS_TO_PIXELS * DEF_TEXT_GUTTER)
#define DEF_HORZ_GUTTER		4
#define ELIPSIS			"..."
#define ELIPSIS_LEN		3

CHXSiteStatusText::CHXSiteStatusText()
    : m_lRefCount(0)
    , m_pSite(NULL)
    , m_pParentSite(NULL)
    , m_rgbBkgndColor(0x00008000)
    , m_rgbTextColor(0x0000FF00)
    , m_pStatusImage(NULL)
{
    memset(&m_statusPos, 0, sizeof(HXxPoint));
    memset(&m_statusSize, 0, sizeof(HXxSize));
}
    
CHXSiteStatusText::~CHXSiteStatusText()
{
    Destroy(); // make sure we cleanup
}


HX_RESULT
CHXSiteStatusText::Create(IHXSite* pSite)
{
    IHXSite*	pChildSite	= NULL;
    HX_RESULT 	hr		= HXR_FAIL;
    
    HX_ASSERT(pSite);
    HX_ASSERT(!m_pSite);
    
    // keep a ref while we use the parent site
    pSite->AddRef();
    
    if (pSite->CreateChild(pChildSite) == HXR_OK)
    {
    	if (pChildSite->AttachUser(this) == HXR_OK)
    	{
    	    m_pParentSite = pSite;
    	    HX_ASSERT(m_StatusText.IsEmpty());
    	    
    	    if (m_StatusText.IsEmpty())
    	    {
    	    	Hide(); // keep hidden until we have status text
    	    }
    	    else
    	    {
    	    	Show();
    	    }
    	    UpdatePosition();
    	    hr = HXR_OK;
    	}
    	HX_RELEASE(pChildSite);
    }

// release if we failed
    if (hr != HXR_OK)
    {
    	HX_RELEASE(pSite);
    }

    return hr;
}


HX_RESULT
CHXSiteStatusText::Destroy()
{
    if (m_pSite)
    {
    	if (m_pParentSite)
    	{
    	    m_pParentSite->DestroyChild(m_pSite);
    	}
    	// DetachUser will call DetachSite, which will release m_pSite
    	m_pSite->DetachUser();
    	
    }

    HX_RELEASE(m_pParentSite);
    
    HX_DELETE(m_pStatusImage);
    
    return HXR_OK;
}



    
HX_RESULT
CHXSiteStatusText::Show()
{
    IHXSite2* pSite2 = NULL;
    
    if (GetIHXSite2(pSite2) == HXR_OK)
    {
    	pSite2->ShowSite(TRUE);
    	HX_RELEASE(pSite2);
    }
    
    return HXR_OK;
}


HX_RESULT
CHXSiteStatusText::Hide()
{
    IHXSite2* pSite2 = NULL;
    
    if (GetIHXSite2(pSite2) == HXR_OK)
    {
    	pSite2->ShowSite(FALSE);
    	HX_RELEASE(pSite2);
    }
    
    return HXR_OK;
}


HX_RESULT
CHXSiteStatusText::ParentChangedSize()
{
    UpdatePosition();
    return HXR_OK;
}



HX_RESULT
CHXSiteStatusText::BringToTop()
{
    IHXSite2* pSite2 = NULL;
    
    if (GetIHXSite2(pSite2) == HXR_OK)
    {
    	pSite2->MoveSiteToTop();
    	HX_RELEASE(pSite2);
    }
    
    return HXR_OK;
}


HX_RESULT
CHXSiteStatusText::UpdatePosition()
{
    HX_RESULT 	hr = HXR_FAIL;
    HXxPoint	parentPos;
    HXxSize	parentSize;
    
    if (m_pParentSite && m_pSite)
    {
    	if (m_pParentSite->GetSize(parentSize) == HXR_OK &&
    	    m_pParentSite->GetPosition(parentPos) == HXR_OK)
    	{
    	    // call platform-specific code to adjust the position & size
    	    // of our site (since fonts may require different heights on
    	    // different platforms
	    _AdjustPosition(&parentPos, &parentSize);
    	    
    	    m_pSite->SetPosition(m_statusPos);
    	    m_pSite->SetSize(m_statusSize);
    	}
    }
    
    return HXR_OK;
}




void
CHXSiteStatusText::SetStatusText(const char* pText)
{
    CHXString oldStatusText = m_StatusText;
    m_StatusText = pText;
    
    if (m_StatusText != oldStatusText)
    {
	if (m_StatusText.IsEmpty())
	{
	    Hide();
	}
	else
	{
	    if (m_pSite)
	    {
		m_pSite->ForceRedraw();
	    }
	    if (oldStatusText.IsEmpty())
	    {
		BringToTop();
		Show();
	    }
	}
    }
}


    
STDMETHODIMP
CHXSiteStatusText::QueryInterface(REFIID riid, void** ppvObj)
{
    if (riid == IID_IHXSiteUser)
    {
    	*ppvObj = (IHXSiteUser*)this;
    	AddRef();
    	return HXR_OK;
    }
    if (riid == IID_IHXSiteWatcher)
    {
    	*ppvObj = (IHXSiteWatcher*)this;
    	AddRef();
    	return HXR_OK;
    }
    else if (riid == IID_IUnknown)
    {
    	*ppvObj = (IUnknown*)(IHXSiteUser*)this;
    	AddRef();
    	return HXR_OK;
    }
    
    return HXR_FAIL;
}


STDMETHODIMP_(ULONG32)
CHXSiteStatusText::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}


STDMETHODIMP_(ULONG32)
CHXSiteStatusText::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
    	return m_lRefCount;
    }
    
    delete this;
    return 0;
}

STDMETHODIMP
CHXSiteStatusText::AttachSite(IHXSite*	/*IN*/ pSite)
{
    HX_RESULT hr = HXR_FAIL;
    
    if (!m_pSite)
    {
    	m_pSite = pSite;
    	m_pSite->AddRef();
    	hr = HXR_OK;
    }
    
    return hr;
}


STDMETHODIMP
CHXSiteStatusText::DetachSite()
{
    HX_RESULT hr = HXR_FAIL;
    
    if (m_pSite)
    {
    	HX_RELEASE(m_pSite);
    	hr = HXR_OK;
    }
    
    return hr;
}


STDMETHODIMP
CHXSiteStatusText::HandleEvent(HXxEvent*	/*IN*/ pEvent)
{
    HX_RESULT hr = HXR_OK;
    
    if (pEvent->event == HX_SURFACE_UPDATE)
    {
    	_DrawStatusText(pEvent);
    }
    
    return hr;
}


STDMETHODIMP_(BOOL)
CHXSiteStatusText::NeedsWindowedSites()
{
    return false;
}


HX_RESULT
CHXSiteStatusText::GetIHXSite2(REF(IHXSite2*) pSite2)
{
    HX_RESULT hr = HXR_FAIL;
    
    if (m_pSite)
    {
    	hr = m_pSite->QueryInterface(IID_IHXSite2, (void**)&pSite2);
    }
    
    return hr;
}


void ConvertHXxColorToRGBColor(HXxColor& pnx, RGBColor& rgb)
{
    unsigned short red, blue, green;
    red = ((unsigned char*)&pnx)[1];
    green = ((unsigned char*)&pnx)[2];
    blue = ((unsigned char*)&pnx)[3];
    
    rgb.red = red | (red << 8); 
    rgb.green = green | (green << 8);  
    rgb.blue = blue | (blue << 8); 
}


HX_RESULT
CHXSiteStatusText::_DrawStatusText(HXxEvent* pEvent)
{
    // this function is called internally and this will never be null
    HX_ASSERT(pEvent);

    // XXXNH: the status text does not support drawing at interrupt time
    if (!IsMacInCooperativeThread())
    {
	return HXR_FAIL;
    }
    
    pEvent->handled = TRUE;
    pEvent->result = HXR_OK;

    // The rect for our status message
    HXxSize sz;
    m_pSite->GetSize(sz);
    Rect theRect;
    ::SetRect(&theRect, 0, 0, sz.cx, sz.cy);
    
    if (!m_pStatusImage || (sizeof(m_pStatusImage) < m_statusSize.cy * m_statusSize.cx * 4))
    {
	HX_DELETE(m_pStatusImage);
	m_pStatusImage = new BYTE[m_statusSize.cy * m_statusSize.cx * 4];
    }
    
    // create offscreen graphics world
    GWorldPtr offscreenGWorld;
    PixMapHandle hPixMap = NULL;
    long theRowBytes = sz.cx * 4;
    
    OSType thePixelFormat = k32BGRAPixelFormat;
    OSErr err = noErr;
    
    err = NewGWorldFromPtr(
		&offscreenGWorld,
		thePixelFormat,
		&theRect,
		NULL, // color table
		NULL, // GDevice handle
		0, // flags
		(Ptr)m_pStatusImage,
		theRowBytes);

    HX_ASSERT(err == noErr);
    
    // set offscreen graphics world:
    GDHandle hGDSave;
    CGrafPtr pCGrafSave;
    ::GetGWorld(&pCGrafSave, &hGDSave);
    ::SetGWorld(offscreenGWorld, NULL);
    
    // update clip region to this site's bounds
    RgnHandle theNewClipRgn = ::NewRgn();
    ::RectRgn(theNewClipRgn, &theRect);
    ::SetClip(theNewClipRgn);
    ::DisposeRgn(theNewClipRgn);
    
    // convert our fg & bg colors
    RGBColor bgColor;
    ConvertHXxColorToRGBColor(m_rgbBkgndColor, bgColor);

    RGBColor fgColor;
    ConvertHXxColorToRGBColor(m_rgbTextColor, fgColor);
    
    // Draw the background rect
    ::RGBBackColor(&bgColor);
    ::RGBForeColor(&bgColor);
    ::PaintRect(&theRect);
    
    ::RGBBackColor(&bgColor);
    ::RGBForeColor(&fgColor);
    
    // pick the font, center it and draw it
    short nFontId = 0;
    GetFNum("\pHelvetica", &nFontId);
    TextFont(nFontId);
    int nSize = DEF_TEXT_HEIGHT;
    TextSize(nSize);
    
    // keep a local copy of status text in case we need to add an elipsis
    CHXString statusText = m_StatusText;
    int nStrLen = statusText.GetLength();
    const char* pStr = statusText;
    
    int nElipsisLen = TextWidth(ELIPSIS, 0, ELIPSIS_LEN);
    int nWidth = TextWidth(pStr, 0, nStrLen);
    while (nWidth > m_statusSize.cx - DEF_HORZ_GUTTER && nStrLen > 0)
    {
	nStrLen--;
    	nWidth = TextWidth(pStr, 0, nStrLen) + nElipsisLen;
    }

    if (nStrLen < statusText.GetLength())
    {
    	statusText = statusText.Left(nStrLen);
    	statusText += ELIPSIS;
    	nStrLen += ELIPSIS_LEN;
    	pStr = statusText;
    }
    
    int nHeight = (int)((double)nSize * POINTS_TO_PIXELS);
    int nX = max(0, (m_statusSize.cx - nWidth) / 2);
    int nY = (int)((double)m_statusSize.cy / 2 + (double)nSize / 2);

    ::MoveTo(nX, nY);
    
    ::TextMode(srcCopy);
    ::DrawText(pStr, 0, nStrLen);
    
    // switch port
    ::SetGWorld(pCGrafSave, hGDSave);
    ::DisposeGWorld(offscreenGWorld);
    
    IHXVideoSurface* pVideoSurface = (IHXVideoSurface*)pEvent->param1;
    
    if (!pVideoSurface)
    {
	return HXR_FAIL;
    }
    
    pVideoSurface->AddRef();
    
    HXxRect rDestRect;
    rDestRect.left = 0;
    rDestRect.top = 0;
    rDestRect.right = sz.cx;
    rDestRect.bottom = sz.cy;
    
    HXxRect rSrcRect = rDestRect;
    
    HXBitmapInfoHeader bitmapInfoHeader;
    bitmapInfoHeader.biSize = sizeof(HXBitmapInfoHeader);
    bitmapInfoHeader.biWidth = sz.cx;
    bitmapInfoHeader.biHeight = sz.cy;
    bitmapInfoHeader.biPlanes = 1;
    bitmapInfoHeader.biBitCount = 32;
    bitmapInfoHeader.biCompression = HX_RGB;
    bitmapInfoHeader.biSizeImage = sz.cx * sz.cy * 4;
    bitmapInfoHeader.biXPelsPerMeter = 0;
    bitmapInfoHeader.biYPelsPerMeter = 0;
    bitmapInfoHeader.biClrUsed = 0;
    bitmapInfoHeader.biClrImportant = 0;
    bitmapInfoHeader.rcolor = 0;
    bitmapInfoHeader.gcolor = 0;
    bitmapInfoHeader.bcolor = 0;
    
    pEvent->result = pVideoSurface->Blt(m_pStatusImage, &bitmapInfoHeader, rDestRect, rSrcRect);
    
    pVideoSurface->Release();
    
    return pEvent->result;
}


HX_RESULT
CHXSiteStatusText::_AdjustPosition(HXxPoint* pParentPos, HXxSize* pParentSize)
{
    HX_RESULT hr = HXR_OK;
    // this function is called internally and these will never be null
    HX_ASSERT(pParentPos && pParentSize);
    
    // take the max width of the parent site
    m_statusPos.x = 0;
    m_statusSize.cx = pParentSize->cx;
    
    // take at most the bottom DEF_STAT_HEIGHT pixels of the parent site
    m_statusPos.y = max(pParentSize->cy - DEF_STAT_HEIGHT, 0);
    m_statusSize.cy = pParentSize->cy - m_statusPos.y;
    
    return hr;
}