[wxWidgets.git] / src / msw / pnghand.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        pnghand.cpp
// Purpose:     Implements a PNG reader class + handler
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:   	wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "pngread.h"
#pragma implementation "pnghand.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#if wxUSE_IOSTREAMH
#include <fstream.h>
#else
#include <fstream>
#  ifdef _MSC_VER
      using namespace std;
#  endif
#endif

#include <windows.h>
#include <wx/palette.h>
#include <wx/bitmap.h>
#include <wx/msw/pngread.h>
#include <wx/msw/dibutils.h>

extern "C" {
#include "png.h"
}

extern "C" void png_read_init PNGARG((png_structp png_ptr));
extern "C" void png_write_init PNGARG((png_structp png_ptr));

#ifndef GlobalAllocPtr
#define     GlobalPtrHandle(lp)         \
                ((HGLOBAL)GlobalHandle(lp))

#define     GlobalLockPtr(lp)                \
                ((BOOL)GlobalLock(GlobalPtrHandle(lp)))
#define     GlobalUnlockPtr(lp)      \
                GlobalUnlock(GlobalPtrHandle(lp))

#define     GlobalAllocPtr(flags, cb)        \
                (GlobalLock(GlobalAlloc((flags), (cb))))
#define     GlobalReAllocPtr(lp, cbNew, flags)       \
                (GlobalUnlockPtr(lp), GlobalLock(GlobalReAlloc(GlobalPtrHandle(lp) , (cbNew), (flags))))
#define     GlobalFreePtr(lp)                \
                (GlobalUnlockPtr(lp), (BOOL)GlobalFree(GlobalPtrHandle(lp)))
#endif


void
ima_png_error(png_struct *png_ptr, char *message)
{
//        wxMessageBox(message, "PNG error");

	longjmp(png_ptr->jmpbuf, 1);
}


// static wxGifReaderIter* iter;
wxPalette *wxCopyPalette(const wxPalette *cmap);

wxPNGReader::wxPNGReader(void)
{
  filetype = 0;
  RawImage = NULL;  		//  Image data

  Width = 0; Height = 0;   		//  Dimensions
  Depth = 0;	 				// (bits x pixel)
  ColorType = 0;				// Bit 1 = Palette used
									// Bit 2 = Color used
									// Bit 3 = Alpha used

  EfeWidth = 0;	 			// Efective Width

  lpbi = NULL;
  bgindex = -1;
  Palette = 0;
  imageOK = FALSE;
}

wxPNGReader::wxPNGReader ( char* ImageFileName )
{
  imageOK = FALSE;
  filetype = 0;
  RawImage = NULL;  		//  Image data

  Width = 0; Height = 0;   		//  Dimensions
  Depth = 0;	 				// (bits x pixel)
  ColorType = 0;				// Bit 1 = Palette used
									// Bit 2 = Color used
									// Bit 3 = Alpha used

  EfeWidth = 0;	 			// Efective Width

  lpbi = NULL;
  bgindex = -1;
  Palette = 0;

  imageOK = ReadFile (ImageFileName);
}

void
wxPNGReader::Create(int width, int height, int depth, int colortype)
{
  Width = width; Height = height; Depth = depth;
  ColorType = (colortype>=0) ? colortype: ((Depth>8) ? COLORTYPE_COLOR: 0);

  if (lpbi)  {
#ifdef __WIN16__
	 GlobalFreePtr((unsigned int) lpbi);
#else
	 GlobalFreePtr(lpbi);
#endif
//	 delete Palette;
  }
  RawImage = 0;
  Palette = 0;
  if (lpbi = DibCreate(Depth, Width, Height))  {
		RawImage = (ImagePointerType)DibPtr(lpbi);
		EfeWidth = (long)(((long)Width*Depth + 31) / 32) * 4;
        imageOK = TRUE;
  }
}

wxPNGReader::~wxPNGReader ( )
{
  if (lpbi)  {
#ifdef __WIN16__
	 GlobalFreePtr((unsigned int) lpbi);
#else
	 GlobalFreePtr(lpbi);
#endif
	 delete Palette;
  }
}


int wxPNGReader::GetIndex(int x, int y)
{
  if (!Inside(x, y) || (Depth>8)) return -1;

  ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3);
  int index = (int)(*ImagePointer);
  return index;
}

bool wxPNGReader::GetRGB(int x, int y, byte* r, byte* g, byte* b)
{
  if (!Inside(x, y)) return FALSE;

  if (Palette) {
	 return Palette->GetRGB(GetIndex(x, y), r, g, b);
/*	 PALETTEENTRY entry;
	 ::GetPaletteEntries((HPALETTE) Palette->GetHPALETTE(), GetIndex(x, y), 1, &entry);
	 *r = entry.peRed;
	 *g = entry.peGreen;
	 *b = entry.peBlue;  */
  } else {
	 ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3);
	 *b = ImagePointer[0];
	 *g = ImagePointer[1];
	 *r = ImagePointer[2];
  }
  return TRUE;
}


bool wxPNGReader::SetIndex(int x, int y, int index)
{
  if (!Inside(x, y) || (Depth>8)) return FALSE;

  ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3);
  *ImagePointer = index;

  return TRUE;
}

bool wxPNGReader::SetRGB(int x, int y, byte r, byte g, byte b)
{
  if (!Inside(x, y)) return FALSE;

  if (ColorType & COLORTYPE_PALETTE)
  {
	 if (!Palette) return FALSE;
	 SetIndex(x, y, Palette->GetPixel(r, g, b));

  } else {
	 ImagePointerType ImagePointer = RawImage + EfeWidth*y + (x*Depth >> 3);
	 ImagePointer[0] = b;
	 ImagePointer[1] = g;
	 ImagePointer[2] = r;
  }

  return TRUE;
}

bool wxPNGReader::SetPalette(wxPalette* colourmap)
{
  if (!colourmap)
	 return FALSE;
  ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR);
  Palette = colourmap;
  return (DibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0);
}

bool
wxPNGReader::SetPalette(int n, byte *r, byte *g, byte *b)
{
  Palette = new wxPalette();
  if (!Palette)
	 return FALSE;

  if (!g) g = r;
  if (!b) b = g;
  Palette->Create(n, r, g, b);
  ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR);
  return (DibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0);
}

bool
wxPNGReader::SetPalette(int n, rgb_color_struct *rgb_struct)
{
  Palette = new wxPalette();
  if (!Palette)
	 return FALSE;

  byte r[256], g[256], b[256];

  for(int i=0; i<n; i++)
  {
	 r[i] = rgb_struct[i].red;
	 g[i] = rgb_struct[i].green;
	 b[i] = rgb_struct[i].blue;
  }
  // Added by JACS copying from Andrew Davison's additions
  // to GIF-reading code
  // Make transparency colour black...
  if (bgindex != -1)
    r[bgindex] = g[bgindex] = b[bgindex] = 0;

  Palette->Create(n, r, g, b);
  ColorType |= (COLORTYPE_PALETTE | COLORTYPE_COLOR);
  return (DibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0);
}

void wxPNGReader::NullData()
{
  lpbi = NULL;
  Palette = NULL;
}

wxBitmap* wxPNGReader::GetBitmap(void)
{
    wxBitmap *bitmap = new wxBitmap;
    if ( InstantiateBitmap(bitmap) )
        return bitmap;
    else
    {
        delete bitmap;
        return NULL;
    }
}

bool wxPNGReader::InstantiateBitmap(wxBitmap *bitmap)
{
	HDC dc = ::CreateCompatibleDC(NULL);

	if (dc)
	{
        // tmpBitmap is a dummy, to satisfy ::CreateCompatibleDC (it
        // is a memory dc that must have a bitmap selected into it)
        HDC dc2 = GetDC(NULL);
        HBITMAP tmpBitmap = ::CreateCompatibleBitmap(dc2, GetWidth(), GetHeight());
        ReleaseDC(NULL, dc2);
        HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, tmpBitmap);

        if ( Palette )
        {
            HPALETTE oldPal = ::SelectPalette(dc, (HPALETTE) Palette->GetHPALETTE(), FALSE);
		    ::RealizePalette(dc);
        }

		HBITMAP hBitmap = ::CreateDIBitmap(dc, lpbi,
		    CBM_INIT, RawImage, (LPBITMAPINFO) lpbi, DIB_PAL_COLORS);

        ::SelectPalette(dc, NULL, TRUE);
        ::SelectObject(dc, oldBitmap);
        ::DeleteObject(tmpBitmap);
        ::DeleteDC(dc);

        if ( hBitmap )
        {
          bitmap->SetHBITMAP((WXHBITMAP) hBitmap);
          bitmap->SetWidth(GetWidth());
          bitmap->SetHeight(GetHeight());
          bitmap->SetDepth(GetDepth());
          if ( GetDepth() > 1 && Palette )
            bitmap->SetPalette(*Palette);
          bitmap->SetOk(TRUE);


          // Make a mask if appropriate
          if ( bgindex > -1 )
          {
            wxMask *mask = CreateMask();
            bitmap->SetMask(mask);
          }
		  return TRUE;
        }
        else
        {
          return FALSE;
        }
	}
	else
    {
		return FALSE;
    }
}

wxPalette *wxCopyPalette(const wxPalette *cmap)
{
  // To get number of entries...
  WORD count = 0;
  ::GetObject((HPALETTE) cmap->GetHPALETTE(), sizeof(WORD), &count);
  
  LOGPALETTE* logPal = (LOGPALETTE*)
		 new BYTE[sizeof(LOGPALETTE) + count*sizeof(PALETTEENTRY)];
  logPal->palVersion = 0x300;
  logPal->palNumEntries = count;
  ::GetPaletteEntries((HPALETTE) cmap->GetHPALETTE(), 0, count, logPal->palPalEntry);
  
  HPALETTE hPalette = ::CreatePalette(logPal);
  delete[] logPal;

  wxPalette *newCmap = new wxPalette;
  newCmap->SetHPALETTE((WXHPALETTE) hPalette);
  return newCmap;
}

wxMask *wxPNGReader::CreateMask(void)
{
    HBITMAP hBitmap = ::CreateBitmap(GetWidth(), GetHeight(), 1, 1, NULL);

	HDC dc = ::CreateCompatibleDC(NULL);
    HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, hBitmap);

    int bgIndex = GetBGIndex();

    int x,y;

    for (x=0; x<GetWidth(); x++)
    {
        for (y=0; y<GetHeight(); y++)
        {
            int index = GetIndex(x, y);
            if ( index == bgIndex )
                ::SetPixel(dc, x, GetHeight() - y - 1, RGB(0, 0, 0));
            else
                ::SetPixel(dc, x, GetHeight() - y - 1, RGB(255, 255, 255));

	    }
    }
    ::SelectObject(dc, oldBitmap);
    wxMask *mask = new wxMask;
    mask->SetMaskBitmap((WXHBITMAP) hBitmap);
    return mask;
}

bool wxPNGReader::ReadFile(char * ImageFileName)
{
  int number_passes;

  if (ImageFileName)
	 strcpy(filename, ImageFileName);

	FILE *fp;
	png_struct *png_ptr;
   png_info *info_ptr;
	wxPNGReaderIter iter(this);

	/* open the file */
	fp = fopen(filename, "rb");
	if (!fp)
		return FALSE;

	/* allocate the necessary structures */
	png_ptr = new (png_struct);
	if (!png_ptr)
	{
		fclose(fp);
		return FALSE;
	}

	info_ptr = new (png_info);
	if (!info_ptr)
	{
		fclose(fp);
		delete(png_ptr);
		return FALSE;
	}
	/* set error handling */
	if (setjmp(png_ptr->jmpbuf))
	{
		png_read_destroy(png_ptr, info_ptr, (png_info *)0);
		fclose(fp);
		delete(png_ptr);
		delete(info_ptr);

		/* If we get here, we had a problem reading the file */
		return FALSE;
	}
        //png_set_error(ima_png_error, NULL);

	/* initialize the structures, info first for error handling */
	png_info_init(info_ptr);
	png_read_init(png_ptr);

	/* set up the input control */
	png_init_io(png_ptr, fp);

	/* read the file information */
	png_read_info(png_ptr, info_ptr);

	/* allocate the memory to hold the image using the fields
		of png_info. */
	png_color_16 my_background={ 0, 31, 127, 255, 0 };

	if (info_ptr->valid & PNG_INFO_bKGD)
    {
		png_set_background(png_ptr, &(info_ptr->background),
			PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
        if ( info_ptr->num_palette > 0 )
            bgindex = info_ptr->background.index;
    }
	else   {
		png_set_background(png_ptr, &my_background,
			PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);

        // Added by JACS: guesswork!
        if ( info_ptr->num_trans != 0 )
            bgindex = info_ptr->num_trans - 1 ;
	 }

	/* tell libpng to strip 16 bit depth files down to 8 bits */
	if (info_ptr->bit_depth == 16)
		png_set_strip_16(png_ptr);

	int pixel_depth=(info_ptr->pixel_depth<24) ? info_ptr->pixel_depth: 24;
	Create(info_ptr->width, info_ptr->height, pixel_depth,
		info_ptr->color_type);

	if (info_ptr->num_palette>0)
    {
	    SetPalette((int)info_ptr->num_palette, (rgb_color_struct*)info_ptr->palette);
    }

	int row_stride = info_ptr->width * ((pixel_depth+7)>>3);
 //	printf("P = %d D = %d RS= %d ", info_ptr->num_palette, info_ptr->pixel_depth,row_stride);
//	printf("CT = %d TRS = %d BD= %d ", info_ptr->color_type, info_ptr->valid & PNG_INFO_tRNS,info_ptr->bit_depth);

	byte *row_pointers = new byte[row_stride];

	/* turn on interlace handling */
	if (info_ptr->interlace_type)
		number_passes = png_set_interlace_handling(png_ptr);
	else
		number_passes = 1;
//	printf("NP = %d ", number_passes);

	for (int pass=0; pass< number_passes; pass++) {
	iter.upset();
	int y=0;
	do	{
//	  (unsigned char *)iter.GetRow();
	  if (info_ptr->interlace_type)  {
		 if (pass>0)
			iter.GetRow(row_pointers, row_stride);
		 png_read_row(png_ptr, row_pointers, NULL);
	  }
	  else
		 png_read_row(png_ptr, row_pointers, NULL);

	  iter.SetRow(row_pointers, row_stride);
	  y++;
	} while(iter.PrevRow());
//	printf("Y=%d ",y);
	}
	delete[] row_pointers;

	/* read the rest of the file, getting any additional chunks
		in info_ptr */
	png_read_end(png_ptr, info_ptr);

	/* clean up after the read, and free any memory allocated */
	png_read_destroy(png_ptr, info_ptr, (png_info *)0);

	/* free the structures */
	delete(png_ptr);
	delete(info_ptr);

	/* close the file */
	fclose(fp);

	/* that's it */
	return TRUE;
}


/* write a png file */

bool wxPNGReader::SaveFile(char * ImageFileName)
{
  if (ImageFileName)
	 strcpy(filename, ImageFileName);

  wxPNGReaderIter iter(this);
  FILE *fp;
   png_struct *png_ptr;
	png_info *info_ptr;

   /* open the file */
	fp = fopen(filename, "wb");
	if (!fp)
		return FALSE;

	/* allocate the necessary structures */
	png_ptr = new (png_struct);
	if (!png_ptr)
	{
		fclose(fp);
		return FALSE;
	}

	info_ptr = new (png_info);
	if (!info_ptr)
	{
		fclose(fp);
		delete(png_ptr);
		return FALSE;
	}

	/* set error handling */
	if (setjmp(png_ptr->jmpbuf))
	{
		png_write_destroy(png_ptr);
		fclose(fp);
		delete(png_ptr);
		delete(info_ptr);

		/* If we get here, we had a problem reading the file */
		return FALSE;
	}
        //png_set_error(ima_png_error, NULL);

//	printf("writig pg %s ", filename);
   /* initialize the structures */
	png_info_init(info_ptr);
	png_write_init(png_ptr);
            
	int row_stride = GetWidth() * ((GetDepth()+7)>>3);
	/* set up the output control */
   png_init_io(png_ptr, fp);

	/* set the file information here */
	info_ptr->width = GetWidth();
	info_ptr->height = GetHeight();
	info_ptr->pixel_depth = GetDepth();
	info_ptr->channels = (GetDepth()>8) ? 3: 1;
	info_ptr->bit_depth = GetDepth()/info_ptr->channels;
	info_ptr->color_type = GetColorType();
	info_ptr->compression_type = info_ptr->filter_type = info_ptr->interlace_type=0;
	info_ptr->valid = 0;
	info_ptr->rowbytes = row_stride;


// printf("P = %d D = %d RS= %d GD= %d CH= %d ", info_ptr->pixel_depth, info_ptr->bit_depth, row_stride, GetDepth(), info_ptr->channels);
	/* set the palette if there is one */
	if ((GetColorType() & COLORTYPE_PALETTE) && GetPalette())
	{
//	  printf("writing paleta[%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette());
	  info_ptr->valid |= PNG_INFO_PLTE;
	  info_ptr->palette = new png_color[256];
	  info_ptr->num_palette = 256;
	  for (int i=0; i<256; i++)
		 GetPalette()->GetRGB(i, &info_ptr->palette[i].red, &info_ptr->palette[i].green, &info_ptr->palette[i].blue);
	}
//	  printf("Paleta [%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette());


   /* optional significant bit chunk */
//   info_ptr->valid |= PNG_INFO_sBIT;
//   info_ptr->sig_bit = true_bit_depth;

	/* optional gamma chunk */
//   info_ptr->valid |= PNG_INFO_gAMA;
//   info_ptr->gamma = gamma;

	/* other optional chunks */

   /* write the file information */
   png_write_info(png_ptr, info_ptr);

   /* set up the transformations you want.  Note that these are
      all optional.  Only call them if you want them */

	/* shift the pixels up to a legal bit depth and fill in
      as appropriate to correctly scale the image */
//   png_set_shift(png_ptr, &(info_ptr->sig_bit));

	/* pack pixels into bytes */
//   png_set_packing(png_ptr);

	/* flip bgr pixels to rgb */
//   png_set_bgr(png_ptr);

   /* swap bytes of 16 bit files to most significant bit first */
//   png_set_swap(png_ptr);

   /* get rid of filler bytes, pack rgb into 3 bytes */
//   png_set_rgbx(png_ptr);

/* If you are only writing one row at a time, this works */

	byte *row_pointers = new byte[row_stride];
  	iter.upset();
	do	{
//	  (unsigned char *)iter.GetRow();
	  iter.GetRow(row_pointers, row_stride);
	  png_write_row(png_ptr, row_pointers);
	} while(iter.PrevRow());
        
        delete[] row_pointers;

/* write the rest of the file */
   png_write_end(png_ptr, info_ptr);

	/* clean up after the write, and free any memory allocated */
   png_write_destroy(png_ptr);

   /* if you malloced the palette, free it here */
   if (info_ptr->palette)
		delete[] (info_ptr->palette);

	/* free the structures */
	delete(png_ptr);
	delete(info_ptr);

	/* close the file */
	fclose(fp);

	/* that's it */
	return TRUE;
}

static int Power(int x, int y)
{
    int z = 1;
    int i;
    for ( i = 0; i < y; i++)
    {
        z *= x;
    }
    return z;
}

static char hexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
  'C', 'D', 'E', 'F' };

static void DecToHex(int dec, char *buf)
{
  int firstDigit = (int)(dec/16.0);
  int secondDigit = (int)(dec - (firstDigit*16.0));
  buf[0] = hexArray[firstDigit];
  buf[1] = hexArray[secondDigit];
  buf[2] = 0;
}
 

bool wxPNGReader::SaveXPM(char *filename, char *name)
{
    char nameStr[256];
    if ( name )
        strcpy(nameStr, name);
    else
    {
        strcpy(nameStr, filename);
        wxStripExtension(nameStr);
    }

    if ( GetDepth() > 4 )
    {
        // Only a depth of 4 and below allowed
        return FALSE;
    }

    if ( !GetPalette() )
        return FALSE;

    ofstream str(filename);
    if ( str.bad() )
        return FALSE;

    int noColours = Power(2, GetDepth());

    // Output header
    str << "/* XPM */\n";
    str << "static char * " << nameStr << "_xpm[] = {\n";
    str << "\"" << GetWidth() << " " << GetHeight() << " " << noColours << " 1\",\n";

    // Output colourmap
    int base = 97 ; // start from 'a'

    unsigned char red, green, blue;
    char hexBuf[4];
    int i;
    for ( i = 0; i < noColours; i ++)
    {
        str << "\"" << (char)(base + i) << "      c #";
        GetPalette()->GetRGB(i, &red, &green, &blue);
        DecToHex(red, hexBuf);
        str << hexBuf;
        DecToHex(green, hexBuf);
        str << hexBuf;
        DecToHex(blue, hexBuf);
        str << hexBuf;
        str << "\",\n";
    }

    // Output the data
    int x, y;
    for ( y = 0; y < GetHeight(); y++)
    {
        str << "\"";
        for ( x = 0; x < GetWidth(); x++)
        {
            int index = GetIndex(x, y);
            str << (char)(base + index) ;
        }
        str << "\",\n";
    }

    str << "};\n";
    str.flush();

    return TRUE;
}

#include <wx/msw/pnghand.h>

IMPLEMENT_DYNAMIC_CLASS(wxPNGFileHandler, wxBitmapHandler)

bool wxPNGFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
    int desiredWidth, int desiredHeight)
{
    wxPNGReader reader;
    if (reader.ReadFile((char*) (const char*) name))
    {
        return reader.InstantiateBitmap(bitmap);
    }
    else
        return FALSE;
}

bool wxPNGFileHandler::SaveFile(wxBitmap *bitmap, const wxString& name, int type, const wxPalette *pal)
{
    return FALSE;
}
Commit	Line	Data
2bda0e17 KB	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: pnghand.cpp
	3	// Purpose: Implements a PNG reader class + handler
	4	// Author: Julian Smart
	5	// Modified by:
	6	// Created: 04/01/98
	7	// RCS-ID: $Id$
	8	// Copyright: (c) Julian Smart and Markus Holzem
	9	// Licence: wxWindows license
	10	/////////////////////////////////////////////////////////////////////////////
	11
	12	#ifdef __GNUG__
	13	#pragma implementation "pngread.h"
	14	#pragma implementation "pnghand.h"
	15	#endif
	16
	17	// For compilers that support precompilation, includes "wx.h".
	18	#include "wx/wxprec.h"
	19
	20	#ifdef __BORLANDC__
	21	#pragma hdrstop
	22	#endif
	23
	24	#include <stdlib.h>
	25	#include <stdio.h>
	26	#include <string.h>
fbc535ff JS	27
fbc535ff JS	28	#if wxUSE_IOSTREAMH
2bda0e17	29	#include <fstream.h>
fbc535ff JS	30	#else
	31	#include <fstream>
	32	# ifdef _MSC_VER
	33	using namespace std;
	34	# endif
	35	#endif
	36
2bda0e17	37	#include <windows.h>
2432b92d JS	38	#include <wx/palette.h>
2432b92d JS	39	#include <wx/bitmap.h>
2bda0e17 KB	40	#include <wx/msw/pngread.h>
	41	#include <wx/msw/dibutils.h>
	42
	43	extern "C" {
	44	#include "png.h"
	45	}
	46
	47	extern "C" void png_read_init PNGARG((png_structp png_ptr));
	48	extern "C" void png_write_init PNGARG((png_structp png_ptr));
	49
	50	#ifndef GlobalAllocPtr
	51	#define GlobalPtrHandle(lp) \
	52	((HGLOBAL)GlobalHandle(lp))
	53
	54	#define GlobalLockPtr(lp) \
	55	((BOOL)GlobalLock(GlobalPtrHandle(lp)))
	56	#define GlobalUnlockPtr(lp) \
	57	GlobalUnlock(GlobalPtrHandle(lp))
	58
	59	#define GlobalAllocPtr(flags, cb) \
	60	(GlobalLock(GlobalAlloc((flags), (cb))))
	61	#define GlobalReAllocPtr(lp, cbNew, flags) \
	62	(GlobalUnlockPtr(lp), GlobalLock(GlobalReAlloc(GlobalPtrHandle(lp) , (cbNew), (flags))))
	63	#define GlobalFreePtr(lp) \
	64	(GlobalUnlockPtr(lp), (BOOL)GlobalFree(GlobalPtrHandle(lp)))
	65	#endif
	66
	67
	68	void
	69	ima_png_error(png_struct png_ptr, char message)
	70	{
	71	// wxMessageBox(message, "PNG error");
	72
	73	longjmp(png_ptr->jmpbuf, 1);
	74	}
	75
	76
	77	// static wxGifReaderIter* iter;
	78	wxPalette wxCopyPalette(const wxPalette cmap);
	79
	80	wxPNGReader::wxPNGReader(void)
	81	{
	82	filetype = 0;
	83	RawImage = NULL; // Image data
	84
	85	Width = 0; Height = 0; // Dimensions
	86	Depth = 0; // (bits x pixel)
	87	ColorType = 0; // Bit 1 = Palette used
	88	// Bit 2 = Color used
	89	// Bit 3 = Alpha used
	90
	91	EfeWidth = 0; // Efective Width
	92
	93	lpbi = NULL;
	94	bgindex = -1;
	95	Palette = 0;
	96	imageOK = FALSE;
	97	}
	98
	99	wxPNGReader::wxPNGReader ( char* ImageFileName )
	100	{
	101	imageOK = FALSE;
	102	filetype = 0;
	103	RawImage = NULL; // Image data
104
105	Width = 0; Height = 0; // Dimensions
106	Depth = 0; // (bits x pixel)
107	ColorType = 0; // Bit 1 = Palette used
108	// Bit 2 = Color used
109	// Bit 3 = Alpha used
110
111	EfeWidth = 0; // Efective Width
112
113	lpbi = NULL;
114	bgindex = -1;
115	Palette = 0;
116
117	imageOK = ReadFile (ImageFileName);
118	}
119
120	void
121	wxPNGReader::Create(int width, int height, int depth, int colortype)
122	{
123	Width = width; Height = height; Depth = depth;
124	ColorType = (colortype>=0) ? colortype: ((Depth>8) ? COLORTYPE_COLOR: 0);
125
126	if (lpbi) {
62448488 JS	127	#ifdef __WIN16__
	128	GlobalFreePtr((unsigned int) lpbi);
	129	#else
2bda0e17	130	GlobalFreePtr(lpbi);
62448488	131	#endif
2bda0e17 KB	132	// delete Palette;
	133	}
	134	RawImage = 0;
	135	Palette = 0;
	136	if (lpbi = DibCreate(Depth, Width, Height)) {
	137	RawImage = (ImagePointerType)DibPtr(lpbi);
	138	EfeWidth = (long)(((long)WidthDepth + 31) / 32) 4;
	139	imageOK = TRUE;
	140	}
	141	}
	142
	143	wxPNGReader::~wxPNGReader ( )
	144	{
	145	if (lpbi) {
62448488 JS	146	#ifdef __WIN16__
	147	GlobalFreePtr((unsigned int) lpbi);
	148	#else
2bda0e17	149	GlobalFreePtr(lpbi);
62448488	150	#endif
2bda0e17 KB	151	delete Palette;
	152	}
	153	}
	154
	155
	156	int wxPNGReader::GetIndex(int x, int y)
	157	{
	158	if (!Inside(x, y) \|\| (Depth>8)) return -1;
	159
	160	ImagePointerType ImagePointer = RawImage + EfeWidthy + (xDepth >> 3);
	161	int index = (int)(*ImagePointer);
	162	return index;
	163	}
	164
	165	bool wxPNGReader::GetRGB(int x, int y, byte* r, byte* g, byte* b)
	166	{
	167	if (!Inside(x, y)) return FALSE;
	168
	169	if (Palette) {
	170	return Palette->GetRGB(GetIndex(x, y), r, g, b);
	171	/* PALETTEENTRY entry;
	172	::GetPaletteEntries((HPALETTE) Palette->GetHPALETTE(), GetIndex(x, y), 1, &entry);
	173	*r = entry.peRed;
	174	*g = entry.peGreen;
	175	b = entry.peBlue; /
	176	} else {
	177	ImagePointerType ImagePointer = RawImage + EfeWidthy + (xDepth >> 3);
	178	*b = ImagePointer[0];
	179	*g = ImagePointer[1];
	180	*r = ImagePointer[2];
	181	}
	182	return TRUE;
	183	}
	184
	185
	186	bool wxPNGReader::SetIndex(int x, int y, int index)
	187	{
	188	if (!Inside(x, y) \|\| (Depth>8)) return FALSE;
	189
	190	ImagePointerType ImagePointer = RawImage + EfeWidthy + (xDepth >> 3);
	191	*ImagePointer = index;
	192
	193	return TRUE;
	194	}
	195
	196	bool wxPNGReader::SetRGB(int x, int y, byte r, byte g, byte b)
	197	{
	198	if (!Inside(x, y)) return FALSE;
	199
	200	if (ColorType & COLORTYPE_PALETTE)
	201	{
	202	if (!Palette) return FALSE;
	203	SetIndex(x, y, Palette->GetPixel(r, g, b));
	204
	205	} else {
	206	ImagePointerType ImagePointer = RawImage + EfeWidthy + (xDepth >> 3);
	207	ImagePointer[0] = b;
	208	ImagePointer[1] = g;
	209	ImagePointer[2] = r;
	210	}
	211
	212	return TRUE;
	213	}
	214
215	bool wxPNGReader::SetPalette(wxPalette* colourmap)
216	{
217	if (!colourmap)
218	return FALSE;
219	ColorType \|= (COLORTYPE_PALETTE \| COLORTYPE_COLOR);
220	Palette = colourmap;
221	return (DibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0);
222	}
223
224	bool
225	wxPNGReader::SetPalette(int n, byte r, byte g, byte *b)
226	{
227	Palette = new wxPalette();
228	if (!Palette)
229	return FALSE;
230
231	if (!g) g = r;
232	if (!b) b = g;
233	Palette->Create(n, r, g, b);
234	ColorType \|= (COLORTYPE_PALETTE \| COLORTYPE_COLOR);
235	return (DibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0);
236	}
237
238	bool
239	wxPNGReader::SetPalette(int n, rgb_color_struct *rgb_struct)
240	{
241	Palette = new wxPalette();
242	if (!Palette)
243	return FALSE;
244
245	byte r[256], g[256], b[256];
246
247	for(int i=0; i<n; i++)
248	{
249	r[i] = rgb_struct[i].red;
250	g[i] = rgb_struct[i].green;
251	b[i] = rgb_struct[i].blue;
252	}
253	// Added by JACS copying from Andrew Davison's additions
254	// to GIF-reading code
255	// Make transparency colour black...
256	if (bgindex != -1)
257	r[bgindex] = g[bgindex] = b[bgindex] = 0;
258
259	Palette->Create(n, r, g, b);
260	ColorType \|= (COLORTYPE_PALETTE \| COLORTYPE_COLOR);
261	return (DibSetUsage(lpbi, (HPALETTE) Palette->GetHPALETTE(), WXIMA_COLORS ) != 0);
262	}
263
264	void wxPNGReader::NullData()
265	{
266	lpbi = NULL;
267	Palette = NULL;
268	}
269
270	wxBitmap* wxPNGReader::GetBitmap(void)
271	{
272	wxBitmap *bitmap = new wxBitmap;
273	if ( InstantiateBitmap(bitmap) )
274	return bitmap;
275	else
276	{
277	delete bitmap;
278	return NULL;
279	}
280	}
281
282	bool wxPNGReader::InstantiateBitmap(wxBitmap *bitmap)
283	{
284	HDC dc = ::CreateCompatibleDC(NULL);
285
286	if (dc)
287	{
288	// tmpBitmap is a dummy, to satisfy ::CreateCompatibleDC (it
289	// is a memory dc that must have a bitmap selected into it)
290	HDC dc2 = GetDC(NULL);
291	HBITMAP tmpBitmap = ::CreateCompatibleBitmap(dc2, GetWidth(), GetHeight());
292	ReleaseDC(NULL, dc2);
c4e7c2aa	293	HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, tmpBitmap);
2bda0e17 KB	294
	295	if ( Palette )
	296	{
	297	HPALETTE oldPal = ::SelectPalette(dc, (HPALETTE) Palette->GetHPALETTE(), FALSE);
	298	::RealizePalette(dc);
	299	}
	300
	301	HBITMAP hBitmap = ::CreateDIBitmap(dc, lpbi,
	302	CBM_INIT, RawImage, (LPBITMAPINFO) lpbi, DIB_PAL_COLORS);
	303
	304	::SelectPalette(dc, NULL, TRUE);
	305	::SelectObject(dc, oldBitmap);
	306	::DeleteObject(tmpBitmap);
	307	::DeleteDC(dc);
	308
	309	if ( hBitmap )
	310	{
	311	bitmap->SetHBITMAP((WXHBITMAP) hBitmap);
	312	bitmap->SetWidth(GetWidth());
	313	bitmap->SetHeight(GetHeight());
	314	bitmap->SetDepth(GetDepth());
	315	if ( GetDepth() > 1 && Palette )
	316	bitmap->SetPalette(*Palette);
	317	bitmap->SetOk(TRUE);
	318
	319
	320	// Make a mask if appropriate
	321	if ( bgindex > -1 )
	322	{
	323	wxMask *mask = CreateMask();
	324	bitmap->SetMask(mask);
	325	}
	326	return TRUE;
	327	}
	328	else
	329	{
	330	return FALSE;
	331	}
	332	}
	333	else
	334	{
	335	return FALSE;
	336	}
	337	}
	338
	339	wxPalette wxCopyPalette(const wxPalette cmap)
	340	{
	341	// To get number of entries...
	342	WORD count = 0;
	343	::GetObject((HPALETTE) cmap->GetHPALETTE(), sizeof(WORD), &count);
	344
	345	LOGPALETTE* logPal = (LOGPALETTE*)
	346	new BYTE[sizeof(LOGPALETTE) + count*sizeof(PALETTEENTRY)];
	347	logPal->palVersion = 0x300;
	348	logPal->palNumEntries = count;
	349	::GetPaletteEntries((HPALETTE) cmap->GetHPALETTE(), 0, count, logPal->palPalEntry);
	350
	351	HPALETTE hPalette = ::CreatePalette(logPal);
	352	delete[] logPal;
	353
	354	wxPalette *newCmap = new wxPalette;
	355	newCmap->SetHPALETTE((WXHPALETTE) hPalette);
	356	return newCmap;
	357	}
358
359	wxMask *wxPNGReader::CreateMask(void)
360	{
361	HBITMAP hBitmap = ::CreateBitmap(GetWidth(), GetHeight(), 1, 1, NULL);
362
363	HDC dc = ::CreateCompatibleDC(NULL);
c4e7c2aa	364	HBITMAP oldBitmap = (HBITMAP) ::SelectObject(dc, hBitmap);
2bda0e17 KB	365
	366	int bgIndex = GetBGIndex();
	367
	368	int x,y;
	369
	370	for (x=0; x<GetWidth(); x++)
	371	{
	372	for (y=0; y<GetHeight(); y++)
	373	{
	374	int index = GetIndex(x, y);
	375	if ( index == bgIndex )
	376	::SetPixel(dc, x, GetHeight() - y - 1, RGB(0, 0, 0));
	377	else
	378	::SetPixel(dc, x, GetHeight() - y - 1, RGB(255, 255, 255));
	379
	380	}
	381	}
	382	::SelectObject(dc, oldBitmap);
	383	wxMask *mask = new wxMask;
	384	mask->SetMaskBitmap((WXHBITMAP) hBitmap);
	385	return mask;
	386	}
	387
	388	bool wxPNGReader::ReadFile(char * ImageFileName)
	389	{
	390	int number_passes;
	391
	392	if (ImageFileName)
	393	strcpy(filename, ImageFileName);
	394
	395	FILE *fp;
	396	png_struct *png_ptr;
	397	png_info *info_ptr;
	398	wxPNGReaderIter iter(this);
	399
	400	/* open the file */
	401	fp = fopen(filename, "rb");
	402	if (!fp)
	403	return FALSE;
	404
	405	/* allocate the necessary structures */
	406	png_ptr = new (png_struct);
	407	if (!png_ptr)
	408	{
	409	fclose(fp);
	410	return FALSE;
	411	}
	412
	413	info_ptr = new (png_info);
	414	if (!info_ptr)
	415	{
	416	fclose(fp);
	417	delete(png_ptr);
	418	return FALSE;
	419	}
	420	/* set error handling */
	421	if (setjmp(png_ptr->jmpbuf))
	422	{
	423	png_read_destroy(png_ptr, info_ptr, (png_info *)0);
	424	fclose(fp);
	425	delete(png_ptr);
	426	delete(info_ptr);
	427
	428	/* If we get here, we had a problem reading the file */
429	return FALSE;
430	}
431	//png_set_error(ima_png_error, NULL);
432
433	/* initialize the structures, info first for error handling */
434	png_info_init(info_ptr);
435	png_read_init(png_ptr);
436
437	/* set up the input control */
438	png_init_io(png_ptr, fp);
439
440	/* read the file information */
441	png_read_info(png_ptr, info_ptr);
442
443	/* allocate the memory to hold the image using the fields
444	of png_info. */
445	png_color_16 my_background={ 0, 31, 127, 255, 0 };
446
447	if (info_ptr->valid & PNG_INFO_bKGD)
448	{
449	png_set_background(png_ptr, &(info_ptr->background),
450	PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
451	if ( info_ptr->num_palette > 0 )
452	bgindex = info_ptr->background.index;
453	}
454	else {
455	png_set_background(png_ptr, &my_background,
456	PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
457
458	// Added by JACS: guesswork!
459	if ( info_ptr->num_trans != 0 )
460	bgindex = info_ptr->num_trans - 1 ;
461	}
462
463	/* tell libpng to strip 16 bit depth files down to 8 bits */
464	if (info_ptr->bit_depth == 16)
465	png_set_strip_16(png_ptr);
466
467	int pixel_depth=(info_ptr->pixel_depth<24) ? info_ptr->pixel_depth: 24;
468	Create(info_ptr->width, info_ptr->height, pixel_depth,
469	info_ptr->color_type);
470
471	if (info_ptr->num_palette>0)
472	{
473	SetPalette((int)info_ptr->num_palette, (rgb_color_struct*)info_ptr->palette);
474	}
475
476	int row_stride = info_ptr->width * ((pixel_depth+7)>>3);
477	// printf("P = %d D = %d RS= %d ", info_ptr->num_palette, info_ptr->pixel_depth,row_stride);
478	// printf("CT = %d TRS = %d BD= %d ", info_ptr->color_type, info_ptr->valid & PNG_INFO_tRNS,info_ptr->bit_depth);
479
480	byte *row_pointers = new byte[row_stride];
481
482	/* turn on interlace handling */
483	if (info_ptr->interlace_type)
484	number_passes = png_set_interlace_handling(png_ptr);
485	else
486	number_passes = 1;
487	// printf("NP = %d ", number_passes);
488
489	for (int pass=0; pass< number_passes; pass++) {
490	iter.upset();
491	int y=0;
492	do {
493	// (unsigned char *)iter.GetRow();
494	if (info_ptr->interlace_type) {
495	if (pass>0)
496	iter.GetRow(row_pointers, row_stride);
497	png_read_row(png_ptr, row_pointers, NULL);
498	}
499	else
500	png_read_row(png_ptr, row_pointers, NULL);
501
502	iter.SetRow(row_pointers, row_stride);
503	y++;
504	} while(iter.PrevRow());
505	// printf("Y=%d ",y);
506	}
507	delete[] row_pointers;
508
509	/* read the rest of the file, getting any additional chunks
510	in info_ptr */
511	png_read_end(png_ptr, info_ptr);
512
513	/* clean up after the read, and free any memory allocated */
514	png_read_destroy(png_ptr, info_ptr, (png_info *)0);
515
516	/* free the structures */
517	delete(png_ptr);
518	delete(info_ptr);
519
520	/* close the file */
521	fclose(fp);
522
523	/* that's it */
524	return TRUE;
525	}
526
527
528	/* write a png file */
529
530	bool wxPNGReader::SaveFile(char * ImageFileName)
531	{
532	if (ImageFileName)
533	strcpy(filename, ImageFileName);
534
535	wxPNGReaderIter iter(this);
536	FILE *fp;
537	png_struct *png_ptr;
538	png_info *info_ptr;
539
540	/* open the file */
541	fp = fopen(filename, "wb");
542	if (!fp)
543	return FALSE;
544
545	/* allocate the necessary structures */
546	png_ptr = new (png_struct);
547	if (!png_ptr)
548	{
549	fclose(fp);
550	return FALSE;
551	}
552
553	info_ptr = new (png_info);
554	if (!info_ptr)
555	{
556	fclose(fp);
557	delete(png_ptr);
558	return FALSE;
559	}
560
561	/* set error handling */
562	if (setjmp(png_ptr->jmpbuf))
563	{
564	png_write_destroy(png_ptr);
565	fclose(fp);
566	delete(png_ptr);
567	delete(info_ptr);
568
569	/* If we get here, we had a problem reading the file */
570	return FALSE;
571	}
572	//png_set_error(ima_png_error, NULL);
573
574	// printf("writig pg %s ", filename);
575	/* initialize the structures */
576	png_info_init(info_ptr);
577	png_write_init(png_ptr);
578
579	int row_stride = GetWidth() * ((GetDepth()+7)>>3);
580	/* set up the output control */
581	png_init_io(png_ptr, fp);
582
583	/* set the file information here */
584	info_ptr->width = GetWidth();
585	info_ptr->height = GetHeight();
586	info_ptr->pixel_depth = GetDepth();
587	info_ptr->channels = (GetDepth()>8) ? 3: 1;
588	info_ptr->bit_depth = GetDepth()/info_ptr->channels;
589	info_ptr->color_type = GetColorType();
590	info_ptr->compression_type = info_ptr->filter_type = info_ptr->interlace_type=0;
591	info_ptr->valid = 0;
592	info_ptr->rowbytes = row_stride;
593
594
595	// printf("P = %d D = %d RS= %d GD= %d CH= %d ", info_ptr->pixel_depth, info_ptr->bit_depth, row_stride, GetDepth(), info_ptr->channels);
596	/* set the palette if there is one */
597	if ((GetColorType() & COLORTYPE_PALETTE) && GetPalette())
598	{
599	// printf("writing paleta[%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette());
600	info_ptr->valid \|= PNG_INFO_PLTE;
601	info_ptr->palette = new png_color[256];
602	info_ptr->num_palette = 256;
603	for (int i=0; i<256; i++)
604	GetPalette()->GetRGB(i, &info_ptr->palette[i].red, &info_ptr->palette[i].green, &info_ptr->palette[i].blue);
605	}
606	// printf("Paleta [%d %d %x]",GetColorType() ,COLORTYPE_PALETTE, GetPalette());
607
608
609	/* optional significant bit chunk */
610	// info_ptr->valid \|= PNG_INFO_sBIT;
611	// info_ptr->sig_bit = true_bit_depth;
612
613	/* optional gamma chunk */
614	// info_ptr->valid \|= PNG_INFO_gAMA;
615	// info_ptr->gamma = gamma;
616
617	/* other optional chunks */
618
619	/* write the file information */
620	png_write_info(png_ptr, info_ptr);
621
622	/* set up the transformations you want. Note that these are
623	all optional. Only call them if you want them */
624
625	/* shift the pixels up to a legal bit depth and fill in
626	as appropriate to correctly scale the image */
627	// png_set_shift(png_ptr, &(info_ptr->sig_bit));
628
629	/* pack pixels into bytes */
630	// png_set_packing(png_ptr);
631
632	/* flip bgr pixels to rgb */
633	// png_set_bgr(png_ptr);
634
635	/* swap bytes of 16 bit files to most significant bit first */
636	// png_set_swap(png_ptr);
637
638	/* get rid of filler bytes, pack rgb into 3 bytes */
639	// png_set_rgbx(png_ptr);
640
641	/* If you are only writing one row at a time, this works */
642
643	byte *row_pointers = new byte[row_stride];
644	iter.upset();
645	do {
646	// (unsigned char *)iter.GetRow();
647	iter.GetRow(row_pointers, row_stride);
648	png_write_row(png_ptr, row_pointers);
649	} while(iter.PrevRow());
650
651	delete[] row_pointers;
652
653	/* write the rest of the file */
654	png_write_end(png_ptr, info_ptr);
655
656	/* clean up after the write, and free any memory allocated */
657	png_write_destroy(png_ptr);
658
659	/* if you malloced the palette, free it here */
660	if (info_ptr->palette)
661	delete[] (info_ptr->palette);
662
663	/* free the structures */
664	delete(png_ptr);
665	delete(info_ptr);
666
667	/* close the file */
668	fclose(fp);
669
670	/* that's it */
671	return TRUE;
672	}
673
674	static int Power(int x, int y)
675	{
676	int z = 1;
677	int i;
678	for ( i = 0; i < y; i++)
679	{
680	z *= x;
681	}
682	return z;
683	}
684
685	static char hexArray[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
686	'C', 'D', 'E', 'F' };
687
688	static void DecToHex(int dec, char *buf)
689	{
690	int firstDigit = (int)(dec/16.0);
691	int secondDigit = (int)(dec - (firstDigit*16.0));
692	buf[0] = hexArray[firstDigit];
693	buf[1] = hexArray[secondDigit];
694	buf[2] = 0;
695	}
696
697
698	bool wxPNGReader::SaveXPM(char filename, char name)
699	{
700	char nameStr[256];
701	if ( name )
702	strcpy(nameStr, name);
703	else
704	{
705	strcpy(nameStr, filename);
706	wxStripExtension(nameStr);
707	}
708
709	if ( GetDepth() > 4 )
710	{
711	// Only a depth of 4 and below allowed
712	return FALSE;
713	}
714
715	if ( !GetPalette() )
716	return FALSE;
717
718	ofstream str(filename);
719	if ( str.bad() )
720	return FALSE;
721
722	int noColours = Power(2, GetDepth());
723
724	// Output header
725	str << "/* XPM */\n";
726	str << "static char * " << nameStr << "_xpm[] = {\n";
727	str << "\"" << GetWidth() << " " << GetHeight() << " " << noColours << " 1\",\n";
728
729	// Output colourmap
730	int base = 97 ; // start from 'a'
731
732	unsigned char red, green, blue;
733	char hexBuf[4];
734	int i;
735	for ( i = 0; i < noColours; i ++)
736	{
737	str << "\"" << (char)(base + i) << " c #";
738	GetPalette()->GetRGB(i, &red, &green, &blue);
739	DecToHex(red, hexBuf);
740	str << hexBuf;
741	DecToHex(green, hexBuf);
742	str << hexBuf;
743	DecToHex(blue, hexBuf);
744	str << hexBuf;
745	str << "\",\n";
746	}
747
748	// Output the data
749	int x, y;
750	for ( y = 0; y < GetHeight(); y++)
751	{
752	str << "\"";
753	for ( x = 0; x < GetWidth(); x++)
754	{
755	int index = GetIndex(x, y);
756	str << (char)(base + index) ;
757	}
758	str << "\",\n";
759	}
760
761	str << "};\n";
762	str.flush();
763
764	return TRUE;
765	}
766
767	#include <wx/msw/pnghand.h>
768
769	IMPLEMENT_DYNAMIC_CLASS(wxPNGFileHandler, wxBitmapHandler)
770
debe6624	771	bool wxPNGFileHandler::LoadFile(wxBitmap *bitmap, const wxString& name, long flags,
2bda0e17 KB	772	int desiredWidth, int desiredHeight)
	773	{
	774	wxPNGReader reader;
	775	if (reader.ReadFile((char) (const char) name))
	776	{
	777	return reader.InstantiateBitmap(bitmap);
	778	}
	779	else
	780	return FALSE;
	781	}
	782
debe6624	783	bool wxPNGFileHandler::SaveFile(wxBitmap bitmap, const wxString& name, int type, const wxPalette pal)
2bda0e17 KB	784	{
	785	return FALSE;
	786	}
	787
	788