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/////////////////////////////////////////////////////////////////////////////
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// Name: src/common/imagbmp.cpp
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// Purpose: wxImage BMP,ICO and CUR handlers
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// Author: Robert Roebling, Chris Elliott
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// RCS-ID: $Id: imagbmp.cpp 54942 2008-08-03 00:23:38Z VZ $
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// Copyright: (c) Robert Roebling, Chris Elliott
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#include "wx/imagbmp.h"
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#include "wx/msw/wrapwin.h"
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#include "wx/bitmap.h"
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#include "wx/palette.h"
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#include "wx/filefn.h"
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#include "wx/wfstream.h"
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#include "wx/quantize.h"
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#include "wx/anidecod.h"
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
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#define BI_BITFIELDS 3
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#define poffset (line * width * 3 + column * 3)
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bool wxBMPHandler::SaveFile(wxImage *image,
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wxOutputStream& stream,
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return SaveDib(image, stream, verbose, true/*IsBmp*/, false/*IsMask*/);
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bool wxBMPHandler::SaveDib(wxImage *image,
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wxOutputStream& stream,
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wxCHECK_MSG( image, false, _T("invalid pointer in wxBMPHandler::SaveFile") );
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wxLogError(_("BMP: Couldn't save invalid image."));
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// get the format of the BMP file to save, else use 24bpp
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unsigned format = wxBMP_24BPP;
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if ( image->HasOption(wxIMAGE_OPTION_BMP_FORMAT) )
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format = image->GetOptionInt(wxIMAGE_OPTION_BMP_FORMAT);
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wxUint16 bpp; // # of bits per pixel
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int palette_size; // # of color map entries, ie. 2^bpp colors
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// set the bpp and appropriate palette_size, and do additional checks
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if ( (format == wxBMP_1BPP) || (format == wxBMP_1BPP_BW) )
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else if ( format == wxBMP_4BPP )
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else if ( (format == wxBMP_8BPP) || (format == wxBMP_8BPP_GREY) ||
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(format == wxBMP_8BPP_RED) || (format == wxBMP_8BPP_PALETTE) )
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// need to set a wxPalette to use this, HOW TO CHECK IF VALID, SIZE?
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if ((format == wxBMP_8BPP_PALETTE)
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&& !image->HasPalette()
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#endif // wxUSE_PALETTE
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wxLogError(_("BMP: wxImage doesn't have own wxPalette."));
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else // you get 24bpp
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format = wxBMP_24BPP;
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unsigned width = image->GetWidth();
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unsigned row_padding = (4 - int(width*bpp/8.0) % 4) % 4; // # bytes to pad to dword
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unsigned row_width = int(width * bpp/8.0) + row_padding; // # of bytes per row
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wxUint16 magic; // format magic, always 'BM'
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wxUint32 filesize; // total file size, inc. headers
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wxUint32 reserved; // for future use
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wxUint32 data_offset; // image data offset in the file
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wxUint32 bih_size; // 2nd part's size
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wxUint32 width, height; // bitmap's dimensions
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wxUint16 planes; // num of planes
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wxUint16 bpp; // bits per pixel
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wxUint32 compression; // compression method
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wxUint32 size_of_bmp; // size of the bitmap
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wxUint32 h_res, v_res; // image resolution in dpi
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wxUint32 num_clrs; // number of colors used
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wxUint32 num_signif_clrs;// number of significant colors
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wxUint32 hdr_size = 14/*BitmapHeader*/ + 40/*BitmapInfoHeader*/;
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hdr.magic = wxUINT16_SWAP_ON_BE(0x4D42/*'BM'*/);
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hdr.filesize = wxUINT32_SWAP_ON_BE( hdr_size + palette_size*4 +
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row_width * image->GetHeight() );
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hdr.data_offset = wxUINT32_SWAP_ON_BE(hdr_size + palette_size*4);
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hdr.bih_size = wxUINT32_SWAP_ON_BE(hdr_size - 14);
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hdr.width = wxUINT32_SWAP_ON_BE(image->GetWidth());
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hdr.height = wxUINT32_SWAP_ON_BE(image->GetHeight());
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hdr.height = wxUINT32_SWAP_ON_BE(2 * image->GetHeight());
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hdr.planes = wxUINT16_SWAP_ON_BE(1); // always 1 plane
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hdr.bpp = wxUINT16_SWAP_ON_BE(bpp);
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hdr.compression = 0; // RGB uncompressed
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hdr.size_of_bmp = wxUINT32_SWAP_ON_BE(row_width * image->GetHeight());
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hdr.h_res = hdr.v_res = wxUINT32_SWAP_ON_BE(72); // 72dpi is standard
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hdr.num_clrs = wxUINT32_SWAP_ON_BE(palette_size); // # colors in colormap
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hdr.num_signif_clrs = 0; // all colors are significant
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if (// VS: looks ugly but compilers tend to do ugly things with structs,
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// like aligning hdr.filesize's ofset to dword :(
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// VZ: we should add padding then...
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!stream.Write(&hdr.magic, 2) ||
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!stream.Write(&hdr.filesize, 4) ||
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!stream.Write(&hdr.reserved, 4) ||
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!stream.Write(&hdr.data_offset, 4)
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wxLogError(_("BMP: Couldn't write the file (Bitmap) header."));
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!stream.Write(&hdr.bih_size, 4) ||
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!stream.Write(&hdr.width, 4) ||
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!stream.Write(&hdr.height, 4) ||
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!stream.Write(&hdr.planes, 2) ||
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!stream.Write(&hdr.bpp, 2) ||
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!stream.Write(&hdr.compression, 4) ||
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!stream.Write(&hdr.size_of_bmp, 4) ||
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!stream.Write(&hdr.h_res, 4) ||
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!stream.Write(&hdr.v_res, 4) ||
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!stream.Write(&hdr.num_clrs, 4) ||
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!stream.Write(&hdr.num_signif_clrs, 4)
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wxLogError(_("BMP: Couldn't write the file (BitmapInfo) header."));
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wxPalette *palette = NULL; // entries for quantized images
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wxUint8 *rgbquad = NULL; // for the RGBQUAD bytes for the colormap
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wxImage *q_image = NULL; // destination for quantized image
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// if <24bpp use quantization to reduce colors for *some* of the formats
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if ( (format == wxBMP_1BPP) || (format == wxBMP_4BPP) ||
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(format == wxBMP_8BPP) || (format == wxBMP_8BPP_PALETTE) )
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// make a new palette and quantize the image
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if (format != wxBMP_8BPP_PALETTE)
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q_image = new wxImage();
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// I get a delete error using Quantize when desired colors > 236
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int quantize = ((palette_size > 236) ? 236 : palette_size);
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// fill the destination too, it gives much nicer 4bpp images
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wxQuantize::Quantize( *image, *q_image, &palette, quantize, 0,
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wxQUANTIZE_FILL_DESTINATION_IMAGE );
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palette = new wxPalette(image->GetPalette());
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#endif // wxUSE_PALETTE
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unsigned char r, g, b;
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rgbquad = new wxUint8 [palette_size*4];
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for (i = 0; i < palette_size; i++)
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if ( !palette->GetRGB(i, &r, &g, &b) )
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#endif // wxUSE_PALETTE
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// make a 256 entry greyscale colormap or 2 entry black & white
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else if ( (format == wxBMP_8BPP_GREY) || (format == wxBMP_8BPP_RED) ||
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(format == wxBMP_1BPP_BW) )
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rgbquad = new wxUint8 [palette_size*4];
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for ( int i = 0; i < palette_size; i++ )
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// if 1BPP_BW then the value should be either 0 or 255
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wxUint8 c = (wxUint8)((i > 0) && (format == wxBMP_1BPP_BW) ? 255 : i);
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// if the colormap was made, then it needs to be written
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if ( !stream.Write(rgbquad, palette_size*4) )
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wxLogError(_("BMP: Couldn't write RGB color map."));
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#endif // wxUSE_PALETTE
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// pointer to the image data, use quantized if available
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wxUint8 *data = (wxUint8*) image->GetData();
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if (q_image) if (q_image->Ok()) data = (wxUint8*) q_image->GetData();
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wxUint8 *buffer = new wxUint8[row_width];
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memset(buffer, 0, row_width);
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for (y = image->GetHeight() -1; y >= 0; y--)
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if ( format == wxBMP_24BPP ) // 3 bytes per pixel red,green,blue
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for ( x = 0; x < width; x++ )
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pixel = 3*(y*width + x);
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buffer[3*x ] = data[pixel+2];
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buffer[3*x + 1] = data[pixel+1];
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buffer[3*x + 2] = data[pixel];
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else if ((format == wxBMP_8BPP) || // 1 byte per pixel in color
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(format == wxBMP_8BPP_PALETTE))
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for (x = 0; x < width; x++)
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pixel = 3*(y*width + x);
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buffer[x] = (wxUint8)palette->GetPixel( data[pixel],
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// FIXME: what should this be? use some std palette maybe?
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#endif // wxUSE_PALETTE
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else if ( format == wxBMP_8BPP_GREY ) // 1 byte per pix, rgb ave to grey
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for (x = 0; x < width; x++)
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pixel = 3*(y*width + x);
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buffer[x] = (wxUint8)(.299*data[pixel] +
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else if ( format == wxBMP_8BPP_RED ) // 1 byte per pixel, red as greys
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for (x = 0; x < width; x++)
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buffer[x] = (wxUint8)data[3*(y*width + x)];
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else if ( format == wxBMP_4BPP ) // 4 bpp in color
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for (x = 0; x < width; x+=2)
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pixel = 3*(y*width + x);
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// fill buffer, ignore if > width
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buffer[x/2] = (wxUint8)(
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((wxUint8)palette->GetPixel(data[pixel],
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data[pixel+2]) << 4) |
376
: ((wxUint8)palette->GetPixel(data[pixel+3],
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// FIXME: what should this be? use some std palette maybe?
382
#endif // wxUSE_PALETTE
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else if ( format == wxBMP_1BPP ) // 1 bpp in "color"
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for (x = 0; x < width; x+=8)
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pixel = 3*(y*width + x);
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buffer[x/8] = (wxUint8)(
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((wxUint8)palette->GetPixel(data[pixel], data[pixel+1], data[pixel+2]) << 7) |
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(((x+1) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+3], data[pixel+4], data[pixel+5]) << 6)) |
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(((x+2) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+6], data[pixel+7], data[pixel+8]) << 5)) |
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(((x+3) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+9], data[pixel+10], data[pixel+11]) << 4)) |
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(((x+4) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+12], data[pixel+13], data[pixel+14]) << 3)) |
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(((x+5) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+15], data[pixel+16], data[pixel+17]) << 2)) |
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(((x+6) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+18], data[pixel+19], data[pixel+20]) << 1)) |
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(((x+7) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+21], data[pixel+22], data[pixel+23]) )) );
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// FIXME: what should this be? use some std palette maybe?
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#endif // wxUSE_PALETTE
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else if ( format == wxBMP_1BPP_BW ) // 1 bpp B&W colormap from red color ONLY
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for (x = 0; x < width; x+=8)
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pixel = 3*(y*width + x);
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buffer[x/8] = (wxUint8)(
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(((wxUint8)(data[pixel] /128.)) << 7) |
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(((x+1) > width) ? 0 : (((wxUint8)(data[pixel+3] /128.)) << 6)) |
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(((x+2) > width) ? 0 : (((wxUint8)(data[pixel+6] /128.)) << 5)) |
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(((x+3) > width) ? 0 : (((wxUint8)(data[pixel+9] /128.)) << 4)) |
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(((x+4) > width) ? 0 : (((wxUint8)(data[pixel+12]/128.)) << 3)) |
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(((x+5) > width) ? 0 : (((wxUint8)(data[pixel+15]/128.)) << 2)) |
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(((x+6) > width) ? 0 : (((wxUint8)(data[pixel+18]/128.)) << 1)) |
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(((x+7) > width) ? 0 : (((wxUint8)(data[pixel+21]/128.)) )) );
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if ( !stream.Write(buffer, row_width) )
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wxLogError(_("BMP: Couldn't write data."));
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#endif // wxUSE_PALETTE
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#endif // wxUSE_PALETTE
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unsigned char r, g, b;
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bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height,
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int bpp, int ncolors, int comp,
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wxFileOffset bmpOffset, wxInputStream& stream,
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bool verbose, bool IsBmp, bool hasPalette)
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wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0, amask = 0;
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int rshift = 0, gshift = 0, bshift = 0, ashift = 0;
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int rbits = 0, gbits = 0, bbits = 0, abits = 0;
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// allocate space for palette if needed:
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cmap = new _cmap[ncolors];
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wxLogError(_("BMP: Couldn't allocate memory."));
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// destroy existing here instead of:
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image->Create(width, height);
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unsigned char *ptr = image->GetData();
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wxLogError( _("BMP: Couldn't allocate memory.") );
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unsigned char *alpha;
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// tell the image to allocate an alpha buffer
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alpha = image->GetAlpha();
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wxLogError(_("BMP: Couldn't allocate memory."));
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// Reading the palette, if it exists:
515
if ( bpp < 16 && ncolors != 0 )
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unsigned char* r = new unsigned char[ncolors];
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unsigned char* g = new unsigned char[ncolors];
519
unsigned char* b = new unsigned char[ncolors];
520
for (int j = 0; j < ncolors; j++)
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stream.Read(bbuf, 4);
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//used in reading .ico file mask
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b[j] = cmap[j].b = ( j ? 255 : 0 );
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// Set the palette for the wxImage
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image->SetPalette(wxPalette(ncolors, r, g, b));
545
#endif // wxUSE_PALETTE
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else if ( bpp == 16 || bpp == 32 )
553
if ( comp == BI_BITFIELDS )
556
stream.Read(dbuf, 4 * 3);
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rmask = wxINT32_SWAP_ON_BE(dbuf[0]);
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gmask = wxINT32_SWAP_ON_BE(dbuf[1]);
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bmask = wxINT32_SWAP_ON_BE(dbuf[2]);
560
// find shift amount (Least significant bit of mask)
561
for (bit = bpp-1; bit>=0; bit--)
563
if (bmask & (1 << bit))
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if (gmask & (1 << bit))
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if (rmask & (1 << bit))
570
// Find number of bits in mask (MSB-LSB+1)
571
for (bit = 0; bit < bpp; bit++)
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if (bmask & (1 << bit))
574
bbits = bit-bshift+1;
575
if (gmask & (1 << bit))
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gbits = bit-gshift+1;
577
if (rmask & (1 << bit))
578
rbits = bit-rshift+1;
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else if ( bpp == 16 )
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else if ( bpp == 32 )
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* Reading the image data
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stream.SeekI(bmpOffset); // else icon, just carry on
617
unsigned char *data = ptr;
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/* set the whole image to the background color */
620
if ( bpp < 16 && (comp == BI_RLE4 || comp == BI_RLE8) )
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for (int i = 0; i < width * height; i++)
631
int linesize = ((width * bpp + 31) / 32) * 4;
633
/* BMPs are stored upside down */
634
for ( int line = (height - 1); line >= 0; line-- )
637
for ( int column = 0; column < width ; )
642
aByte = stream.GetC();
645
for (int bit = 0; bit < 8 && column < width; bit++)
647
int index = ((aByte & (0x80 >> bit)) ? 1 : 0);
648
ptr[poffset] = cmap[index].r;
649
ptr[poffset + 1] = cmap[index].g;
650
ptr[poffset + 2] = cmap[index].b;
656
if ( comp == BI_RLE4 )
660
aByte = stream.GetC();
668
else if ( aByte == 1 )
673
else if ( aByte == 2 )
675
aByte = stream.GetC();
677
linepos = column * bpp / 4;
678
aByte = stream.GetC();
679
line -= aByte; // upside down
683
int absolute = aByte;
686
for (int k = 0; k < absolute; k++)
691
aByte = stream.GetC();
692
nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
693
nibble[1] = (wxUint8)( aByte & 0x0F ) ;
695
ptr[poffset ] = cmap[nibble[k%2]].r;
696
ptr[poffset + 1] = cmap[nibble[k%2]].g;
697
ptr[poffset + 2] = cmap[nibble[k%2]].b;
702
if ( readBytes & 0x01 )
703
aByte = stream.GetC();
709
nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
710
nibble[1] = (wxUint8)( aByte & 0x0F ) ;
712
for ( int l = 0; l < first && column < width; l++ )
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ptr[poffset ] = cmap[nibble[l%2]].r;
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ptr[poffset + 1] = cmap[nibble[l%2]].g;
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ptr[poffset + 2] = cmap[nibble[l%2]].b;
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for (int nibble = 0; nibble < 2 && column < width; nibble++)
727
int index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4));
730
ptr[poffset] = cmap[index].r;
731
ptr[poffset + 1] = cmap[index].g;
732
ptr[poffset + 2] = cmap[index].b;
739
if ( comp == BI_RLE8 )
743
aByte = stream.GetC();
748
/* column = width; */
750
else if ( aByte == 1 )
755
else if ( aByte == 2 )
757
aByte = stream.GetC();
759
linepos = column * bpp / 8;
760
aByte = stream.GetC();
765
int absolute = aByte;
766
for (int k = 0; k < absolute; k++)
769
aByte = stream.GetC();
770
ptr[poffset ] = cmap[aByte].r;
771
ptr[poffset + 1] = cmap[aByte].g;
772
ptr[poffset + 2] = cmap[aByte].b;
775
if ( absolute & 0x01 )
776
aByte = stream.GetC();
781
for ( int l = 0; l < first && column < width; l++ )
783
ptr[poffset ] = cmap[aByte].r;
784
ptr[poffset + 1] = cmap[aByte].g;
785
ptr[poffset + 2] = cmap[aByte].b;
793
ptr[poffset ] = cmap[aByte].r;
794
ptr[poffset + 1] = cmap[aByte].g;
795
ptr[poffset + 2] = cmap[aByte].b;
797
// linepos += size; seems to be wrong, RR
801
else if ( bpp == 24 )
803
stream.Read(bbuf, 3);
805
ptr[poffset ] = (unsigned char)bbuf[2];
806
ptr[poffset + 1] = (unsigned char)bbuf[1];
807
ptr[poffset + 2] = (unsigned char)bbuf[0];
810
else if ( bpp == 16 )
813
stream.Read(&aWord, 2);
814
aWord = wxUINT16_SWAP_ON_BE(aWord);
816
/* use the masks and calculated amonut of shift
817
to retrieve the color data out of the word. Then
818
shift it left by (8 - number of bits) such that
819
the image has the proper dynamic range */
820
temp = (unsigned char)((aWord & rmask) >> rshift << (8-rbits));
822
temp = (unsigned char)((aWord & gmask) >> gshift << (8-gbits));
823
ptr[poffset + 1] = temp;
824
temp = (unsigned char)((aWord & bmask) >> bshift << (8-bbits));
825
ptr[poffset + 2] = temp;
831
stream.Read(&aDword, 4);
832
aDword = wxINT32_SWAP_ON_BE(aDword);
834
temp = (unsigned char)((aDword & rmask) >> rshift);
836
temp = (unsigned char)((aDword & gmask) >> gshift);
837
ptr[poffset + 1] = temp;
838
temp = (unsigned char)((aDword & bmask) >> bshift);
839
ptr[poffset + 2] = temp;
842
temp = (unsigned char)((aDword & amask) >> ashift);
843
alpha[line * width + column] = temp;
848
while ( (linepos < linesize) && (comp != 1) && (comp != 2) )
850
stream.Read(&aByte, 1);
859
image->SetMask(false);
861
const wxStreamError err = stream.GetLastError();
862
return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF;
865
bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream,
866
bool verbose, bool IsBmp)
872
wxFileOffset offset = 0; // keep gcc quiet
875
// read the header off the .BMP format file
877
offset = stream.TellI();
878
if (offset == wxInvalidOffset)
881
stream.Read(bbuf, 2);
882
stream.Read(dbuf, 16);
886
stream.Read(dbuf, 4);
889
wxInt32 size = wxINT32_SWAP_ON_BE(dbuf[0]);
891
offset = offset + wxINT32_SWAP_ON_BE(dbuf[2]);
893
stream.Read(dbuf, 4 * 2);
894
int width = wxINT32_SWAP_ON_BE((int)dbuf[0]);
895
int height = wxINT32_SWAP_ON_BE((int)dbuf[1]);
896
if ( !IsBmp)height = height / 2; // for icons divide by 2
901
wxLogError( _("DIB Header: Image width > 32767 pixels for file.") );
904
if ( height > 32767 )
907
wxLogError( _("DIB Header: Image height > 32767 pixels for file.") );
911
stream.Read(&aWord, 2);
914
int planes = (int)wxUINT16_SWAP_ON_BE( aWord );
916
stream.Read(&aWord, 2);
917
int bpp = wxUINT16_SWAP_ON_BE((int)aWord);
918
if ( bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32 )
921
wxLogError( _("DIB Header: Unknown bitdepth in file.") );
925
stream.Read(dbuf, 4 * 4);
926
int comp = wxINT32_SWAP_ON_BE((int)dbuf[0]);
927
if ( comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 &&
928
comp != BI_BITFIELDS )
931
wxLogError( _("DIB Header: Unknown encoding in file.") );
935
stream.Read(dbuf, 4 * 2);
936
int ncolors = wxINT32_SWAP_ON_BE( (int)dbuf[0] );
939
/* some more sanity checks */
940
if (((comp == BI_RLE4) && (bpp != 4)) ||
941
((comp == BI_RLE8) && (bpp != 8)) ||
942
((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32)))
945
wxLogError( _("DIB Header: Encoding doesn't match bitdepth.") );
949
//read DIB; this is the BMP image or the XOR part of an icon image
950
if ( !DoLoadDib(image, width, height, bpp, ncolors, comp, offset, stream,
951
verbose, IsBmp, true) )
954
wxLogError( _("Error in reading image DIB.") );
960
//read Icon mask which is monochrome
961
//there is no palette, so we will create one
963
if ( !DoLoadDib(&mask, width, height, 1, 2, BI_RGB, offset, stream,
964
verbose, IsBmp, false) )
967
wxLogError( _("ICO: Error in reading mask DIB.") );
970
image->SetMaskFromImage(mask, 255, 255, 255);
977
bool wxBMPHandler::LoadFile(wxImage *image, wxInputStream& stream,
978
bool verbose, int WXUNUSED(index))
980
// Read a single DIB fom the file:
981
return LoadDib(image, stream, verbose, true/*isBmp*/);
984
bool wxBMPHandler::DoCanRead(wxInputStream& stream)
986
unsigned char hdr[2];
988
if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
991
// do we have the BMP file signature?
992
return hdr[0] == 'B' && hdr[1] == 'M';
995
#endif // wxUSE_STREAMS
999
//-----------------------------------------------------------------------------
1001
//-----------------------------------------------------------------------------
1003
IMPLEMENT_DYNAMIC_CLASS(wxICOHandler, wxBMPHandler)
1009
wxUint8 bWidth; // Width of the image
1010
wxUint8 bHeight; // Height of the image (times 2)
1011
wxUint8 bColorCount; // Number of colors in image (0 if >=8bpp)
1012
wxUint8 bReserved; // Reserved
1014
// these two are different in icons and cursors:
1016
wxUint16 wPlanes; // Color Planes or XHotSpot
1017
wxUint16 wBitCount; // Bits per pixel or YHotSpot
1019
wxUint32 dwBytesInRes; // how many bytes in this resource?
1020
wxUint32 dwImageOffset; // where in the file is this image
1025
wxUint16 idReserved; // Reserved
1026
wxUint16 idType; // resource type (1 for icons, 2 for cursors)
1027
wxUint16 idCount; // how many images?
1031
bool wxICOHandler::SaveFile(wxImage *image,
1032
wxOutputStream& stream,
1036
//sanity check; icon must be less than 127 pixels high and 255 wide
1037
if ( image->GetHeight () > 127 )
1040
wxLogError(_("ICO: Image too tall for an icon."));
1043
if ( image->GetWidth () > 255 )
1046
wxLogError(_("ICO: Image too wide for an icon."));
1050
const int images = 1; // only generate one image
1052
// VS: This is a hack of sort - since ICO and CUR files are almost
1053
// identical, we have all the meat in wxICOHandler and check for
1054
// the actual (handler) type when the code has to distinguish between
1056
int type = (this->GetType() == wxBITMAP_TYPE_CUR) ? 2 : 1;
1058
// write a header, (ICONDIR)
1059
// Calculate the header size
1060
wxUint32 offset = 3 * sizeof(wxUint16);
1063
IconDir.idReserved = 0;
1064
IconDir.idType = wxUINT16_SWAP_ON_BE((wxUint16)type);
1065
IconDir.idCount = wxUINT16_SWAP_ON_BE((wxUint16)images);
1066
stream.Write(&IconDir.idReserved, sizeof(IconDir.idReserved));
1067
stream.Write(&IconDir.idType, sizeof(IconDir.idType));
1068
stream.Write(&IconDir.idCount, sizeof(IconDir.idCount));
1069
if ( !stream.IsOk() )
1072
wxLogError(_("ICO: Error writing the image file!"));
1076
// for each iamage write a description ICONDIRENTRY:
1077
ICONDIRENTRY icondirentry;
1078
for (int img = 0; img < images; img++)
1082
if ( image->HasMask() )
1084
// make another image with black/white:
1085
mask = image->ConvertToMono (image->GetMaskRed(), image->GetMaskGreen(), image->GetMaskBlue() );
1087
// now we need to change the masked regions to black:
1088
unsigned char r = image->GetMaskRed();
1089
unsigned char g = image->GetMaskGreen();
1090
unsigned char b = image->GetMaskBlue();
1091
if ( (r != 0) || (g != 0) || (b != 0) )
1093
// Go round and apply black to the masked bits:
1095
for (i = 0; i < mask.GetWidth(); i++)
1097
for (j = 0; j < mask.GetHeight(); j++)
1099
if ((r == mask.GetRed(i, j)) &&
1100
(g == mask.GetGreen(i, j))&&
1101
(b == mask.GetBlue(i, j)) )
1102
image->SetRGB(i, j, 0, 0, 0 );
1109
// just make a black mask all over:
1110
mask = image->Copy();
1112
for (i = 0; i < mask.GetWidth(); i++)
1113
for (j = 0; j < mask.GetHeight(); j++)
1114
mask.SetRGB(i, j, 0, 0, 0 );
1116
// Set the formats for image and mask
1117
// (Windows never saves with more than 8 colors):
1118
image->SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_8BPP);
1120
// monochome bitmap:
1121
mask.SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_1BPP_BW);
1123
bool IsMask = false;
1125
//calculate size and offset of image and mask
1126
wxCountingOutputStream cStream;
1127
bool bResult = SaveDib(image, cStream, verbose, IsBmp, IsMask);
1131
wxLogError(_("ICO: Error writing the image file!"));
1136
bResult = SaveDib(&mask, cStream, verbose, IsBmp, IsMask);
1140
wxLogError(_("ICO: Error writing the image file!"));
1143
wxUint32 Size = cStream.GetSize();
1145
// wxCountingOutputStream::IsOk() always returns true for now and this
1146
// "if" provokes VC++ warnings in optimized build
1148
if ( !cStream.Ok() )
1151
wxLogError(_("ICO: Error writing the image file!"));
1156
offset = offset + sizeof(ICONDIRENTRY);
1158
icondirentry.bWidth = (wxUint8)image->GetWidth();
1159
icondirentry.bHeight = (wxUint8)(2 * image->GetHeight());
1160
icondirentry.bColorCount = 0;
1161
icondirentry.bReserved = 0;
1162
icondirentry.wPlanes = wxUINT16_SWAP_ON_BE(1);
1163
icondirentry.wBitCount = wxUINT16_SWAP_ON_BE(wxBMP_8BPP);
1164
if ( type == 2 /*CUR*/)
1166
int hx = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ?
1167
image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) :
1168
image->GetWidth() / 2;
1169
int hy = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ?
1170
image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) :
1171
image->GetHeight() / 2;
1173
// actually write the values of the hot spot here:
1174
icondirentry.wPlanes = wxUINT16_SWAP_ON_BE((wxUint16)hx);
1175
icondirentry.wBitCount = wxUINT16_SWAP_ON_BE((wxUint16)hy);
1177
icondirentry.dwBytesInRes = wxUINT32_SWAP_ON_BE(Size);
1178
icondirentry.dwImageOffset = wxUINT32_SWAP_ON_BE(offset);
1180
// increase size to allow for the data written:
1184
stream.Write(&icondirentry.bWidth, sizeof(icondirentry.bWidth));
1185
stream.Write(&icondirentry.bHeight, sizeof(icondirentry.bHeight));
1186
stream.Write(&icondirentry.bColorCount, sizeof(icondirentry.bColorCount));
1187
stream.Write(&icondirentry.bReserved, sizeof(icondirentry.bReserved));
1188
stream.Write(&icondirentry.wPlanes, sizeof(icondirentry.wPlanes));
1189
stream.Write(&icondirentry.wBitCount, sizeof(icondirentry.wBitCount));
1190
stream.Write(&icondirentry.dwBytesInRes, sizeof(icondirentry.dwBytesInRes));
1191
stream.Write(&icondirentry.dwImageOffset, sizeof(icondirentry.dwImageOffset));
1192
if ( !stream.IsOk() )
1195
wxLogError(_("ICO: Error writing the image file!"));
1199
// actually save it:
1201
bResult = SaveDib(image, stream, verbose, IsBmp, IsMask);
1205
wxLogError(_("ICO: Error writing the image file!"));
1210
bResult = SaveDib(&mask, stream, verbose, IsBmp, IsMask);
1214
wxLogError(_("ICO: Error writing the image file!"));
1218
} // end of for loop
1223
bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream,
1224
bool verbose, int index)
1227
return DoLoadFile(image, stream, verbose, index);
1230
bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream,
1231
bool WXUNUSED(verbose), int index)
1233
bool bResult wxDUMMY_INITIALIZE(false);
1238
wxFileOffset iPos = stream.TellI();
1239
stream.Read(&IconDir, sizeof(IconDir));
1240
wxUint16 nIcons = wxUINT16_SWAP_ON_BE(IconDir.idCount);
1241
// nType is 1 for Icons, 2 for Cursors:
1242
wxUint16 nType = wxUINT16_SWAP_ON_BE(IconDir.idType);
1244
// loop round the icons and choose the best one:
1245
ICONDIRENTRY *pIconDirEntry = new ICONDIRENTRY[nIcons];
1246
ICONDIRENTRY *pCurrentEntry = pIconDirEntry;
1249
int iSel = wxNOT_FOUND;
1251
for (int i = 0; i < nIcons; i++ )
1253
stream.Read(pCurrentEntry, sizeof(ICONDIRENTRY));
1254
// bHeight and bColorCount are wxUint8
1255
if ( pCurrentEntry->bWidth >= wMax )
1257
// see if we have more colors, ==0 indicates > 8bpp:
1258
if ( pCurrentEntry->bColorCount == 0 )
1259
pCurrentEntry->bColorCount = 255;
1260
if ( pCurrentEntry->bColorCount >= colmax )
1263
wMax = pCurrentEntry->bWidth;
1264
colmax = pCurrentEntry->bColorCount;
1272
// VS: Note that we *have* to run the loop above even if index != -1, because
1273
// it reads ICONDIRENTRies.
1277
if ( iSel == wxNOT_FOUND || iSel < 0 || iSel >= nIcons )
1279
wxLogError(_("ICO: Invalid icon index."));
1284
// seek to selected icon:
1285
pCurrentEntry = pIconDirEntry + iSel;
1286
stream.SeekI(iPos + wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset), wxFromStart);
1287
bResult = LoadDib(image, stream, true, IsBmp);
1288
bool bIsCursorType = (this->GetType() == wxBITMAP_TYPE_CUR) || (this->GetType() == wxBITMAP_TYPE_ANI);
1289
if ( bResult && bIsCursorType && nType == 2 )
1291
// it is a cursor, so let's set the hotspot:
1292
image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, wxUINT16_SWAP_ON_BE(pCurrentEntry->wPlanes));
1293
image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, wxUINT16_SWAP_ON_BE(pCurrentEntry->wBitCount));
1296
delete[] pIconDirEntry;
1300
int wxICOHandler::GetImageCount(wxInputStream& stream)
1303
wxFileOffset iPos = stream.TellI();
1305
stream.Read(&IconDir, sizeof(IconDir));
1306
wxUint16 nIcons = wxUINT16_SWAP_ON_BE(IconDir.idCount);
1311
bool wxICOHandler::DoCanRead(wxInputStream& stream)
1314
unsigned char hdr[4];
1315
if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
1318
// hdr[2] is one for an icon and two for a cursor
1319
return hdr[0] == '\0' && hdr[1] == '\0' && hdr[2] == '\1' && hdr[3] == '\0';
1322
#endif // wxUSE_STREAMS
1325
//-----------------------------------------------------------------------------
1327
//-----------------------------------------------------------------------------
1329
IMPLEMENT_DYNAMIC_CLASS(wxCURHandler, wxICOHandler)
1333
bool wxCURHandler::DoCanRead(wxInputStream& stream)
1336
unsigned char hdr[4];
1337
if ( !stream.Read(hdr, WXSIZEOF(hdr)) )
1340
// hdr[2] is one for an icon and two for a cursor
1341
return hdr[0] == '\0' && hdr[1] == '\0' && hdr[2] == '\2' && hdr[3] == '\0';
1344
#endif // wxUSE_STREAMS
1346
//-----------------------------------------------------------------------------
1348
//-----------------------------------------------------------------------------
1350
IMPLEMENT_DYNAMIC_CLASS(wxANIHandler, wxCURHandler)
1354
bool wxANIHandler::LoadFile(wxImage *image, wxInputStream& stream,
1355
bool WXUNUSED(verbose), int index)
1357
wxANIDecoder decoder;
1358
if (!decoder.Load(stream))
1361
return decoder.ConvertToImage(index != -1 ? (size_t)index : 0, image);
1364
bool wxANIHandler::DoCanRead(wxInputStream& stream)
1367
return decod.CanRead(stream);
1370
int wxANIHandler::GetImageCount(wxInputStream& stream)
1372
wxANIDecoder decoder;
1373
if (!decoder.Load(stream))
1376
return decoder.GetFrameCount();
1379
#endif // wxUSE_STREAMS
1381
#endif // wxUSE_ICO_CUR
1383
#endif // wxUSE_IMAGE