bitmap.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

/////////////////////////////////////////////////////////////////////////////
// Name:        src/mac/classic/bitmap.cpp
// Purpose:     wxBitmap
// Author:      Stefan Csomor
// Modified by:
// Created:     1998-01-01
// RCS-ID:      $Id: bitmap.cpp,v 1.12 2006/10/30 19:26:38 VZ Exp $
// Copyright:   (c) Stefan Csomor
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#include "wx/bitmap.h"

#ifndef WX_PRECOMP
    #include "wx/log.h"
    #include "wx/icon.h"
    #include "wx/image.h"
#endif

#include "wx/xpmdecod.h"

#include "wx/rawbmp.h"

IMPLEMENT_DYNAMIC_CLASS(wxBitmap, wxGDIObject)
IMPLEMENT_DYNAMIC_CLASS(wxMask, wxObject)
IMPLEMENT_DYNAMIC_CLASS(wxBitmapHandler, wxObject )

#ifdef __DARWIN__
    #include <ApplicationServices/ApplicationServices.h>
#else
    #include <PictUtils.h>
#endif

#include "wx/mac/uma.h"

CTabHandle wxMacCreateColorTable( int numColors )
{
    CTabHandle newColors; /* Handle to the new color table */

    /* Allocate memory for the color table */
    newColors = (CTabHandle)NewHandleClear( sizeof (ColorTable) +
    sizeof (ColorSpec) * (numColors - 1) );
    if (newColors != nil)
    {
        /* Initialize the fields */
        (**newColors).ctSeed = GetCTSeed();
        (**newColors).ctFlags = 0;
        (**newColors).ctSize = numColors - 1;
        /* Initialize the table of colors */
    }
    return newColors ;
}

void wxMacDestroyColorTable( CTabHandle colors )
{
    DisposeHandle( (Handle) colors ) ;
}

void wxMacSetColorTableEntry( CTabHandle newColors , int index , int red , int green ,  int blue )
{
    (**newColors).ctTable[index].value = index;
    (**newColors).ctTable[index].rgb.red = red ; // someRedValue;
    (**newColors).ctTable[index].rgb.green = green ; // someGreenValue;
    (**newColors).ctTable[index].rgb.blue = blue ; // someBlueValue;
}

GWorldPtr wxMacCreateGWorld( int width , int height , int depth )
{
    OSErr err = noErr ;
    GWorldPtr port ;
    Rect rect = { 0 , 0 , height , width } ;

    if ( depth < 0 )
    {
        depth = wxDisplayDepth() ;
    }

    err = NewGWorld( &port , depth , &rect , NULL , NULL , 0 ) ;
    if ( err == noErr )
    {
        return port ;
    }
    return NULL ;
}

void wxMacDestroyGWorld( GWorldPtr gw )
{
    if ( gw )
        DisposeGWorld( gw ) ;
}

#define kDefaultRes 0x00480000 /* Default resolution is 72 DPI; Fixed type */

OSErr SetupCIconHandlePixMap( CIconHandle icon , short depth , Rect  *bounds , CTabHandle colors )
{
    CTabHandle newColors;       /* Color table used for the off-screen PixMap */
    Ptr        offBaseAddr;     /* Pointer to the off-screen pixel image */
    OSErr      error;           /* Returns error code */
    short      bytesPerRow;     /* Number of bytes per row in the PixMap */


    error = noErr;
    newColors = nil;
    offBaseAddr = nil;

    bytesPerRow = ((depth * (bounds->right - bounds->left) + 31) / 32) * 4;

   /* Clone the clut if indexed color; allocate a dummy clut if direct color*/
    if (depth <= 8)
        {
        newColors = colors;
        error = HandToHand((Handle *) &newColors);
        }
    else
        {
        newColors = (CTabHandle) NewHandle(sizeof(ColorTable) -
                sizeof(CSpecArray));
        error = MemError();
        }
    if (error == noErr)
        {
        /* Allocate pixel image; long integer multiplication avoids overflow */
        (**icon).iconData = NewHandle((unsigned long) bytesPerRow * (bounds->bottom -
                bounds->top));
        if ((**icon).iconData != nil)
            {
            /* Initialize fields common to indexed and direct PixMaps */
            (**icon).iconPMap.baseAddr = 0;  /* Point to image */
            (**icon).iconPMap.rowBytes = bytesPerRow | /* MSB set for PixMap */
                    0x8000;
            (**icon).iconPMap.bounds = *bounds;        /* Use given bounds */
            (**icon).iconPMap.pmVersion = 0;           /* No special stuff */
            (**icon).iconPMap.packType = 0;            /* Default PICT pack */
            (**icon).iconPMap.packSize = 0;            /* Always zero in mem */
            (**icon).iconPMap.hRes = kDefaultRes;      /* 72 DPI default res */
            (**icon).iconPMap.vRes = kDefaultRes;      /* 72 DPI default res */
            (**icon).iconPMap.pixelSize = depth;       /* Set # bits/pixel */

            /* Initialize fields specific to indexed and direct PixMaps */
            if (depth <= 8)
                {
                /* PixMap is indexed */
                (**icon).iconPMap.pixelType = 0;       /* Indicates indexed */
                (**icon).iconPMap.cmpCount = 1;        /* Have 1 component */
                (**icon).iconPMap.cmpSize = depth;     /* Component size=depth */
                (**icon).iconPMap.pmTable = newColors; /* Handle to CLUT */
                }
            else
                {
                /* PixMap is direct */
                (**icon).iconPMap.pixelType = RGBDirect; /* Indicates direct */
                (**icon).iconPMap.cmpCount = 3;          /* Have 3 components */
                if (depth == 16)
                    (**icon).iconPMap.cmpSize = 5;       /* 5 bits/component */
                else
                    (**icon).iconPMap.cmpSize = 8;       /* 8 bits/component */
                (**newColors).ctSeed = 3 * (**icon).iconPMap.cmpSize;
                (**newColors).ctFlags = 0;
                (**newColors).ctSize = 0;
                (**icon).iconPMap.pmTable = newColors;
                }
            }
        else
            error = MemError();
        }
    else
        newColors = nil;

    /* If no errors occurred, return a handle to the new off-screen PixMap */
    if (error != noErr)
        {
        if (newColors != nil)
            DisposeCTable(newColors);
        }

    /* Return the error code */
    return error;
}

CIconHandle wxMacCreateCIcon(GWorldPtr image , GWorldPtr mask , short dstDepth , short iconSize  )
{
    GWorldPtr       saveWorld;
    GDHandle        saveHandle;

    GetGWorld(&saveWorld,&saveHandle);      // save Graphics env state
    SetGWorld(image,nil);

    Rect frame = { 0 , 0 , iconSize , iconSize } ;
    Rect imageBounds = frame ;
    GetPortBounds( image , &imageBounds ) ;

    int bwSize = iconSize / 8 * iconSize ;
    CIconHandle icon = (CIconHandle) NewHandleClear( sizeof ( CIcon ) + 2 * bwSize) ;
    HLock((Handle)icon) ;
    SetupCIconHandlePixMap( icon , dstDepth , &frame,GetCTable(dstDepth)) ;
    HLock( (**icon).iconData ) ;
    (**icon).iconPMap.baseAddr = *(**icon).iconData ;

    LockPixels(GetGWorldPixMap(image));

    CopyBits(GetPortBitMapForCopyBits(image),
                (BitMapPtr)&((**icon).iconPMap),
                &imageBounds,
                &imageBounds,
                srcCopy | ditherCopy, nil);


    UnlockPixels(GetGWorldPixMap(image));
    HUnlock( (**icon).iconData ) ;

    (**icon).iconMask.rowBytes = iconSize / 8 ;
    (**icon).iconMask.bounds = frame ;

    (**icon).iconBMap.rowBytes = iconSize / 8 ;
    (**icon).iconBMap.bounds = frame ;
    (**icon).iconMask.baseAddr = (char*) &(**icon).iconMaskData ;
    (**icon).iconBMap.baseAddr = (char*) &(**icon).iconMaskData + bwSize ;

    if ( mask )
    {
        Rect r ;
        GetPortBounds( image , &r ) ;
      LockPixels(GetGWorldPixMap(mask) ) ;
      CopyBits(GetPortBitMapForCopyBits(mask) ,
          &(**icon).iconBMap , &r , &r, srcCopy , nil ) ;
      CopyBits(GetPortBitMapForCopyBits(mask) ,
          &(**icon).iconMask , &r , &r, srcCopy , nil ) ;
      UnlockPixels(GetGWorldPixMap( mask ) ) ;
    }
    else
    {
        Rect r ;
        GetPortBounds( image , &r ) ;
        LockPixels(GetGWorldPixMap(image));
      CopyBits(GetPortBitMapForCopyBits(image) ,
          &(**icon).iconBMap , &r , &r, srcCopy , nil ) ;
      CopyBits(GetPortBitMapForCopyBits(image) ,
          &(**icon).iconMask , &r , &r, srcCopy , nil ) ;
        UnlockPixels(GetGWorldPixMap(image));
    }

    (**icon).iconMask.baseAddr = NULL ;
    (**icon).iconBMap.baseAddr = NULL ;
    (**icon).iconPMap.baseAddr = NULL ;
    HUnlock((Handle)icon) ;
    SetGWorld(saveWorld,saveHandle);

    return icon;
}

PicHandle wxMacCreatePict(GWorldPtr wp, GWorldPtr mask)
{
  CGrafPtr       origPort ;
  GDHandle       origDev ;

  PicHandle      pict;

  RGBColor       white = { 0xffff ,0xffff , 0xffff } ;
  RGBColor       black = { 0x0000 ,0x0000 , 0x0000 } ;

  GetGWorld( &origPort , &origDev ) ;

  RgnHandle clipRgn = NULL ;

  if ( mask )
  {
    clipRgn = NewRgn() ;
    LockPixels( GetGWorldPixMap( mask ) ) ;
    BitMapToRegion( clipRgn , (BitMap*) *GetGWorldPixMap( mask ) ) ;
    UnlockPixels( GetGWorldPixMap( mask ) ) ;
  }

  SetGWorld( wp , NULL ) ;
  Rect portRect ;
  if ( clipRgn )
    GetRegionBounds( clipRgn , &portRect ) ;
  else
      GetPortBounds( wp , &portRect ) ;
  pict = OpenPicture(&portRect);
  if(pict)
  {
    RGBForeColor( &black ) ;
    RGBBackColor( &white ) ;

    if ( clipRgn )
        SetClip( clipRgn ) ;

    LockPixels( GetGWorldPixMap( wp ) ) ;
    CopyBits(GetPortBitMapForCopyBits(wp),
            GetPortBitMapForCopyBits(wp),
            &portRect,
            &portRect,
            srcCopy,clipRgn);
    UnlockPixels( GetGWorldPixMap( wp ) ) ;
    ClosePicture();
  }
  SetGWorld( origPort , origDev ) ;
  if ( clipRgn )
      DisposeRgn( clipRgn ) ;
  return pict;
}

void wxMacCreateBitmapButton( ControlButtonContentInfo*info , const wxBitmap& bitmap , int forceType )
{
    memset( info , 0 , sizeof(ControlButtonContentInfo) ) ;
    if ( bitmap.Ok() )
    {
        wxBitmapRefData * bmap = (wxBitmapRefData*) ( bitmap.GetRefData()) ;
        if ( bmap == NULL )
            return ;

        if ( bmap->m_bitmapType == kMacBitmapTypePict )
        {
            info->contentType = kControlContentPictHandle ;
            info->u.picture = MAC_WXHMETAFILE(bmap->m_hPict) ;
        }
        else if ( bmap->m_bitmapType == kMacBitmapTypeGrafWorld )
        {
            if ( (forceType == kControlContentCIconHandle || ( bmap->m_width == bmap->m_height && forceType != kControlContentPictHandle ) ) && ((bmap->m_width & 0x3) == 0) )
            {
                info->contentType = kControlContentCIconHandle ;
                if ( bitmap.GetMask() )
                {
                    info->u.cIconHandle = wxMacCreateCIcon( MAC_WXHBITMAP(bmap->m_hBitmap) , MAC_WXHBITMAP(bitmap.GetMask()->GetMaskBitmap()) ,
                                                           8 , bmap->m_width ) ;
                }
                else
                {
                    info->u.cIconHandle = wxMacCreateCIcon( MAC_WXHBITMAP(bmap->m_hBitmap) , NULL ,
                                                           8 , bmap->m_width ) ;
                }
            }
            else
            {
                info->contentType = kControlContentPictHandle ;
                if ( bitmap.GetMask() )
                {
                    info->u.picture = wxMacCreatePict( MAC_WXHBITMAP(bmap->m_hBitmap) , MAC_WXHBITMAP(bitmap.GetMask()->GetMaskBitmap() ) ) ;
               }
                else
                {
                    info->u.picture = wxMacCreatePict( MAC_WXHBITMAP(bmap->m_hBitmap) , NULL ) ;
                }
            }
        }
        else if ( bmap->m_bitmapType == kMacBitmapTypeIcon )
        {
            info->contentType = kControlContentCIconHandle ;
            info->u.cIconHandle = MAC_WXHICON(bmap->m_hIcon) ;
        }
    }
}

wxBitmapRefData::wxBitmapRefData()
    : m_width(0)
    , m_height(0)
    , m_depth(0)
    , m_ok(false)
    , m_numColors(0)
    , m_quality(0)
{
    m_bitmapMask = NULL;
    m_hBitmap = NULL ;
    m_hPict = NULL ;
    m_hIcon = NULL ;
    m_bitmapType = kMacBitmapTypeUnknownType ;
    m_hasAlpha = false;
}

// TODO move this to a public function of Bitmap Ref
static void DisposeBitmapRefData(wxBitmapRefData *data)
{
    if ( !data )
        return ;

    switch (data->m_bitmapType)
    {
        case kMacBitmapTypePict :
            {
                if ( data->m_hPict )
                {
                    KillPicture( MAC_WXHMETAFILE( data->m_hPict ) ) ;
                    data->m_hPict = NULL ;
                }
            }
            break ;
        case kMacBitmapTypeGrafWorld :
            {
                if ( data->m_hBitmap )
                {
                    wxMacDestroyGWorld( MAC_WXHBITMAP(data->m_hBitmap) ) ;
                    data->m_hBitmap = NULL ;
                }
            }
            break ;
        case kMacBitmapTypeIcon :
            if ( data->m_hIcon )
            {
                DisposeCIcon( MAC_WXHICON(data->m_hIcon) ) ;
                data->m_hIcon = NULL ;
            }

        default :
            // unkown type ?
            break ;
    }

    if (data->m_bitmapMask)
    {
        delete data->m_bitmapMask;
        data->m_bitmapMask = NULL;
    }
}

wxBitmapRefData::~wxBitmapRefData()
{
  DisposeBitmapRefData( this ) ;
}

bool wxBitmap::CopyFromIcon(const wxIcon& icon)
{
    Ref(icon) ;
    return true;
}

wxBitmap::wxBitmap()
{
    m_refData = NULL;
}

wxBitmap::~wxBitmap()
{
}

wxBitmap::wxBitmap(const char bits[], int the_width, int the_height, int no_bits)
{
    m_refData = new wxBitmapRefData;

    M_BITMAPDATA->m_width = the_width ;
    M_BITMAPDATA->m_height = the_height ;
    M_BITMAPDATA->m_depth = no_bits ;
    M_BITMAPDATA->m_numColors = 0;
    if ( no_bits == 1 )
    {
        M_BITMAPDATA->m_bitmapType = kMacBitmapTypeGrafWorld ;
        M_BITMAPDATA->m_hBitmap = wxMacCreateGWorld( the_width , the_height , no_bits ) ;
        M_BITMAPDATA->m_ok = (MAC_WXHBITMAP(M_BITMAPDATA->m_hBitmap) != NULL ) ;

        CGrafPtr    origPort ;
        GDHandle    origDevice ;

        GetGWorld( &origPort , &origDevice ) ;
        SetGWorld( MAC_WXHBITMAP(M_BITMAPDATA->m_hBitmap) , NULL ) ;
        LockPixels( GetGWorldPixMap( MAC_WXHBITMAP(M_BITMAPDATA->m_hBitmap) ) ) ;

        // bits is a char array

        unsigned char* linestart = (unsigned char*) bits ;
        int linesize = ( the_width / (sizeof(unsigned char) * 8)) ;
        if ( the_width % (sizeof(unsigned char) * 8) ) {
            linesize += sizeof(unsigned char);
        }

        RGBColor colors[2] = {
            { 0xFFFF , 0xFFFF , 0xFFFF } ,
            { 0, 0 , 0 }
        } ;

        for ( int y = 0 ; y < the_height ; ++y , linestart += linesize )
        {
            for ( int x = 0 ; x < the_width ; ++x )
            {