--- /dev/null
+/////////////////////////////////////////////////////////////////////////////
+// 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>
+#endif
+
+#include <windows.h>
+#include <wx/palette.h>
+#include <wx/bitmap.h>
+#include <wx/mac/pnghand.h>
+#include <wx/mac/pngread.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));
+
+extern CTabHandle wxMacCreateColorTable( int numColors ) ;
+extern void wxMacDestroyColorTable( CTabHandle colors ) ;
+extern void wxMacSetColorTableEntry( CTabHandle newColors , int index , int red , int green , int blue ) ;
+extern GWorldPtr wxMacCreateGWorld( int height , int width , int depth ) ;
+extern void wxMacDestroyGWorld( GWorldPtr gw ) ;
+
+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)
+ {
+ wxMacDestroyGWorld( lpbi ) ;
+// delete Palette;
+ }
+ RawImage = 0;
+ Palette = 0;
+ if (lpbi = wxMacCreateGWorld( Width , Height , Depth) )
+ {
+ EfeWidth = (long)(((long)Width*Depth + 31) / 32) * 4;
+ int bitwidth = width ;
+ if ( EfeWidth > bitwidth )
+ bitwidth = EfeWidth ;
+
+ RawImage = (byte*) new char[ ( bitwidth * Height * ((Depth+7)>>3) ) ];
+ imageOK = TRUE;
+ }
+}
+
+wxPNGReader::~wxPNGReader ( )
+{
+ delete[] RawImage ;
+ if (lpbi) {
+ wxMacDestroyGWorld( lpbi ) ;
+ }
+ 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 true ;
+// 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 true ;
+// 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 true ;
+// 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)
+{
+ if ( lpbi )
+ {
+ bitmap->SetHBITMAP((WXHBITMAP) lpbi);
+ 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);
+ }
+ */
+ lpbi = NULL ; // bitmap has taken over ownership
+ return TRUE;
+ }
+ else
+ {
+ return FALSE;
+ }
+/*
+ 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;
+ }
+ */
+ return false ;
+}
+
+wxPalette *wxCopyPalette(const wxPalette *cmap)
+{
+ wxPalette *newCmap = new wxPalette( *cmap ) ;
+ 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;
+ */
+ return NULL ;
+}
+
+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(wxUnix2MacFilename( ImageFileName ), "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;
+ CGrafPtr origPort ;
+ GDHandle origDevice ;
+
+ GetGWorld( &origPort , &origDevice ) ;
+ // ignore shapedc
+ SetGWorld( lpbi , NULL ) ;
+ 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);
+
+ if ( info_ptr->palette )
+ {
+ if ( pixel_depth == 8 )
+ {
+ png_color_struct* color ;
+ RGBColor col ;
+ unsigned char* p = &row_pointers[0] ;
+ MoveTo( 0 , y ) ;
+ unsigned char lastcol = *p ;
+ color = &info_ptr->palette[lastcol] ;
+ col.red = (color->red << 8) | color->red ;
+ col.green = (color->green << 8) | color->green ;
+ col.blue = (color->blue << 8) | color->blue ;
+ RGBForeColor( &col ) ;
+ for ( int i = 0 ; i < info_ptr->width ; ++i , ++p)
+ {
+ if ( *p != lastcol )
+ {
+ LineTo( i , y ) ;
+ lastcol = *p ;
+ color = &info_ptr->palette[lastcol] ;
+ col.red = (color->red << 8) | color->red ;
+ col.green = (color->green << 8) | color->green ;
+ col.blue = (color->blue << 8) | color->blue ;
+ RGBForeColor( &col ) ;
+ }
+ }
+ LineTo( info_ptr->width - 1 , y ) ;
+ }
+ else
+ {
+ for ( int i = 0 ; i < info_ptr->width ; ++i )
+ {
+ png_color_struct* color ;
+ RGBColor col ;
+
+ int byte = ( i * pixel_depth ) / 8 ;
+ int offset = ( 8 - pixel_depth ) - ( i * pixel_depth ) % 8 ;
+
+ int index = ( row_pointers[byte] >> offset ) & ( 0xFF >> ( 8 - pixel_depth ) );
+ color = &info_ptr->palette[index] ;
+ col.red = (color->red << 8) | color->red ;
+ col.green = (color->green << 8) | color->green ;
+ col.blue = (color->blue << 8) | color->blue ;
+ SetCPixel( i, y, &col);
+ }
+ }
+ }
+ else
+ {
+ for ( int i = 0 ; i < info_ptr->width ; ++i )
+ {
+ png_color_struct* color ;
+ RGBColor col ;
+ color =(png_color_struct*) (&row_pointers[i*3]) ;
+ col.red = (color->red << 8) | color->red ;
+ col.green = (color->green << 8) | color->green ;
+ col.blue = (color->blue << 8) | color->blue ;
+ SetCPixel( i, y, &col);
+ }
+ }
+ if (number_passes)
+ iter.SetRow(row_pointers, row_stride);
+ y++;
+ }
+ while(iter.PrevRow());
+ SetGWorld( origPort , origDevice ) ;
+
+// 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;
+}
+
+
+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;
+}
+
+
projects / wxWidgets.git / blobdiff