X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/700ec4546cfa7a89b3bca0a4eb5b6ee9d43ac17a..3b01b1fe4cb656f39290bf7f3891667855abe601:/src/common/imagbmp.cpp diff --git a/src/common/imagbmp.cpp b/src/common/imagbmp.cpp index baec6a1d48..c699ae596f 100644 --- a/src/common/imagbmp.cpp +++ b/src/common/imagbmp.cpp @@ -1,16 +1,15 @@ ///////////////////////////////////////////////////////////////////////////// // Name: imagbmp.cpp -// Purpose: wxImage BMP handler -// Author: Robert Roebling +// Purpose: wxImage BMP,ICO and CUR handlers +// Author: Robert Roebling, Chris Elliott // RCS-ID: $Id$ -// Copyright: (c) Robert Roebling +// Copyright: (c) Robert Roebling, Chris Elliott // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -/* - We don't put pragma implement in this file because it is already present in - src/common/image.cpp -*/ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) +#pragma implementation "imagbmp.h" +#endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" @@ -19,7 +18,11 @@ #pragma hdrstop #endif -#include "wx/image.h" +#include "wx/defs.h" + +#if wxUSE_IMAGE + +#include "wx/imagbmp.h" #include "wx/bitmap.h" #include "wx/debug.h" #include "wx/log.h" @@ -28,6 +31,7 @@ #include "wx/wfstream.h" #include "wx/intl.h" #include "wx/module.h" +#include "wx/quantize.h" // For memcpy #include @@ -39,22 +43,26 @@ #endif #ifdef __WXMSW__ -#include +#include "wx/msw/wrapwin.h" #endif //----------------------------------------------------------------------------- // wxBMPHandler //----------------------------------------------------------------------------- -#if !USE_SHARED_LIBRARIES IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler) -#endif #if wxUSE_STREAMS #ifndef BI_RGB -#define BI_RGB 0 + #define BI_RGB 0 +#endif + +#ifndef BI_RLE8 #define BI_RLE8 1 +#endif + +#ifndef BI_RLE4 #define BI_RLE4 2 #endif @@ -64,127 +72,477 @@ IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler) #define poffset (line * width * 3 + column * 3) -bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSED(verbose), int WXUNUSED(index) ) +bool wxBMPHandler::SaveFile(wxImage *image, + wxOutputStream& stream, + bool verbose) { - int rshift = 0, gshift = 0, bshift = 0; - wxUint8 aByte; - wxUint16 aWord; - wxInt32 dbuf[4], aDword, - rmask = 0, gmask = 0, bmask = 0; - wxInt8 bbuf[4]; - struct _cmap { - unsigned char r, g, b; - } *cmap = NULL; + return SaveDib(image, stream, verbose, true/*IsBmp*/, false/*IsMask*/); +} - off_t start_offset = stream.TellI(); +bool wxBMPHandler::SaveDib(wxImage *image, + wxOutputStream& stream, + bool verbose, + bool IsBmp, + bool IsMask) - image->Destroy(); +{ + wxCHECK_MSG( image, false, _T("invalid pointer in wxBMPHandler::SaveFile") ); - /* - * Read the BMP header - */ + if ( !image->Ok() ) + { + if ( verbose ) + wxLogError(_("BMP: Couldn't save invalid image.")); + return false; + } - stream.Read( &bbuf, 2 ); - stream.Read( dbuf, 4 * 4 ); + // get the format of the BMP file to save, else use 24bpp + unsigned format = wxBMP_24BPP; + if ( image->HasOption(wxIMAGE_OPTION_BMP_FORMAT) ) + format = image->GetOptionInt(wxIMAGE_OPTION_BMP_FORMAT); -#if 0 // unused - wxInt32 size = wxINT32_SWAP_ON_BE( dbuf[0] ); -#endif - wxInt32 offset = wxINT32_SWAP_ON_BE( dbuf[2] ); + wxUint16 bpp; // # of bits per pixel + int palette_size; // # of color map entries, ie. 2^bpp colors - stream.Read(dbuf, 4 * 2); - int width = (int)wxINT32_SWAP_ON_BE( dbuf[0] ); - int height = (int)wxINT32_SWAP_ON_BE( dbuf[1] ); - if (width > 32767) + // set the bpp and appropriate palette_size, and do additional checks + if ( (format == wxBMP_1BPP) || (format == wxBMP_1BPP_BW) ) + { + bpp = 1; + palette_size = 2; + } + else if ( format == wxBMP_4BPP ) { - wxLogError( wxT("Image width > 32767 pixels for file.") ); - return FALSE; + bpp = 4; + palette_size = 16; } - if (height > 32767) + else if ( (format == wxBMP_8BPP) || (format == wxBMP_8BPP_GREY) || + (format == wxBMP_8BPP_RED) || (format == wxBMP_8BPP_PALETTE) ) { - wxLogError( wxT("Image height > 32767 pixels for file.") ); - return FALSE; + // need to set a wxPalette to use this, HOW TO CHECK IF VALID, SIZE? + if ((format == wxBMP_8BPP_PALETTE) +#if wxUSE_PALETTE + && !image->HasPalette() +#endif // wxUSE_PALETTE + ) + { + if ( verbose ) + wxLogError(_("BMP: wxImage doesn't have own wxPalette.")); + return false; + } + bpp = 8; + palette_size = 256; } + else // you get 24bpp + { + format = wxBMP_24BPP; + bpp = 24; + palette_size = 0; + } + + unsigned width = image->GetWidth(); + unsigned row_padding = (4 - int(width*bpp/8.0) % 4) % 4; // # bytes to pad to dword + unsigned row_width = int(width * bpp/8.0) + row_padding; // # of bytes per row + + struct + { + // BitmapHeader: + wxUint16 magic; // format magic, always 'BM' + wxUint32 filesize; // total file size, inc. headers + wxUint32 reserved; // for future use + wxUint32 data_offset; // image data offset in the file + + // BitmapInfoHeader: + wxUint32 bih_size; // 2nd part's size + wxUint32 width, height; // bitmap's dimensions + wxUint16 planes; // num of planes + wxUint16 bpp; // bits per pixel + wxUint32 compression; // compression method + wxUint32 size_of_bmp; // size of the bitmap + wxUint32 h_res, v_res; // image resolution in dpi + wxUint32 num_clrs; // number of colors used + wxUint32 num_signif_clrs;// number of significant colors + } hdr; + + wxUint32 hdr_size = 14/*BitmapHeader*/ + 40/*BitmapInfoHeader*/; + + hdr.magic = wxUINT16_SWAP_ON_BE(0x4D42/*'BM'*/); + hdr.filesize = wxUINT32_SWAP_ON_BE( hdr_size + palette_size*4 + + row_width * image->GetHeight() ); + hdr.reserved = 0; + hdr.data_offset = wxUINT32_SWAP_ON_BE(hdr_size + palette_size*4); - stream.Read( &aWord, 2 ); -/* - TODO - int planes = (int)wxUINT16_SWAP_ON_BE( aWord ); -*/ - stream.Read( &aWord, 2 ); - int bpp = (int)wxUINT16_SWAP_ON_BE( aWord ); - if (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32) + hdr.bih_size = wxUINT32_SWAP_ON_BE(hdr_size - 14); + hdr.width = wxUINT32_SWAP_ON_BE(image->GetWidth()); + if ( IsBmp ) { - wxLogError( wxT("unknown bitdepth in file.") ); - return FALSE; + hdr.height = wxUINT32_SWAP_ON_BE(image->GetHeight()); } + else + { + hdr.height = wxUINT32_SWAP_ON_BE(2 * image->GetHeight()); + } + hdr.planes = wxUINT16_SWAP_ON_BE(1); // always 1 plane + hdr.bpp = wxUINT16_SWAP_ON_BE(bpp); + hdr.compression = 0; // RGB uncompressed + hdr.size_of_bmp = wxUINT32_SWAP_ON_BE(row_width * image->GetHeight()); + hdr.h_res = hdr.v_res = wxUINT32_SWAP_ON_BE(72); // 72dpi is standard + hdr.num_clrs = wxUINT32_SWAP_ON_BE(palette_size); // # colors in colormap + hdr.num_signif_clrs = 0; // all colors are significant - stream.Read( dbuf, 4 * 4 ); - int comp = (int)wxINT32_SWAP_ON_BE( dbuf[0] ); - if (comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && comp != BI_BITFIELDS) + if ( IsBmp ) + { + if (// VS: looks ugly but compilers tend to do ugly things with structs, + // like aligning hdr.filesize's ofset to dword :( + // VZ: we should add padding then... + !stream.Write(&hdr.magic, 2) || + !stream.Write(&hdr.filesize, 4) || + !stream.Write(&hdr.reserved, 4) || + !stream.Write(&hdr.data_offset, 4) + ) + { + if (verbose) + wxLogError(_("BMP: Couldn't write the file (Bitmap) header.")); + return false; + } + } + if ( !IsMask ) { - wxLogError( wxT("unknown encoding in Windows BMP file.") ); - return FALSE; + if ( + !stream.Write(&hdr.bih_size, 4) || + !stream.Write(&hdr.width, 4) || + !stream.Write(&hdr.height, 4) || + !stream.Write(&hdr.planes, 2) || + !stream.Write(&hdr.bpp, 2) || + !stream.Write(&hdr.compression, 4) || + !stream.Write(&hdr.size_of_bmp, 4) || + !stream.Write(&hdr.h_res, 4) || + !stream.Write(&hdr.v_res, 4) || + !stream.Write(&hdr.num_clrs, 4) || + !stream.Write(&hdr.num_signif_clrs, 4) + ) + { + if (verbose) + wxLogError(_("BMP: Couldn't write the file (BitmapInfo) header.")); + return false; + } } - stream.Read( dbuf, 4 * 2 ); - int ncolors = (int)wxINT32_SWAP_ON_BE( dbuf[0] ); - if (ncolors == 0) - ncolors = 1 << bpp; - /* some more sanity checks */ - if (((comp == BI_RLE4) && (bpp != 4)) || - ((comp == BI_RLE8) && (bpp != 8)) || - ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32))) + wxPalette *palette = NULL; // entries for quantized images + wxUint8 *rgbquad = NULL; // for the RGBQUAD bytes for the colormap + wxImage *q_image = NULL; // destination for quantized image + + // if <24bpp use quantization to reduce colors for *some* of the formats + if ( (format == wxBMP_1BPP) || (format == wxBMP_4BPP) || + (format == wxBMP_8BPP) || (format == wxBMP_8BPP_PALETTE) ) { - wxLogError( wxT("encoding of BMP doesn't match bitdepth.") ); - return FALSE; + // make a new palette and quantize the image + if (format != wxBMP_8BPP_PALETTE) + { + q_image = new wxImage(); + + // I get a delete error using Quantize when desired colors > 236 + int quantize = ((palette_size > 236) ? 236 : palette_size); + // fill the destination too, it gives much nicer 4bpp images + wxQuantize::Quantize( *image, *q_image, &palette, quantize, 0, + wxQUANTIZE_FILL_DESTINATION_IMAGE ); + } + else + { +#if wxUSE_PALETTE + palette = new wxPalette(image->GetPalette()); +#endif // wxUSE_PALETTE + } + + int i; + unsigned char r, g, b; + rgbquad = new wxUint8 [palette_size*4]; + + for (i = 0; i < palette_size; i++) + { +#if wxUSE_PALETTE + if ( !palette->GetRGB(i, &r, &g, &b) ) +#endif // wxUSE_PALETTE + r = g = b = 0; + + rgbquad[i*4] = b; + rgbquad[i*4+1] = g; + rgbquad[i*4+2] = r; + rgbquad[i*4+3] = 0; + } } - if (bpp < 16) + // make a 256 entry greyscale colormap or 2 entry black & white + else if ( (format == wxBMP_8BPP_GREY) || (format == wxBMP_8BPP_RED) || + (format == wxBMP_1BPP_BW) ) { - cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors); - if (!cmap) + int i; + rgbquad = new wxUint8 [palette_size*4]; + + for (i = 0; i < palette_size; i++) { - wxLogError( wxT("Cannot allocate RAM for color map in BMP file.") ); - return FALSE; + // if 1BPP_BW then just 0 and 255 then exit + if (( i > 0) && (format == wxBMP_1BPP_BW)) i = 255; + rgbquad[i*4] = i; + rgbquad[i*4+1] = i; + rgbquad[i*4+2] = i; + rgbquad[i*4+3] = 0; + } + } + + // if the colormap was made, then it needs to be written + if (rgbquad) + { + if ( !IsMask ) + { + if ( !stream.Write(rgbquad, palette_size*4) ) + { + if (verbose) + wxLogError(_("BMP: Couldn't write RGB color map.")); + delete[] rgbquad; +#if wxUSE_PALETTE + delete palette; +#endif // wxUSE_PALETTE + delete q_image; + return false; + } + } + delete []rgbquad; + } + + // pointer to the image data, use quantized if available + wxUint8 *data = (wxUint8*) image->GetData(); + if (q_image) if (q_image->Ok()) data = (wxUint8*) q_image->GetData(); + + wxUint8 *buffer = new wxUint8[row_width]; + memset(buffer, 0, row_width); + int y; unsigned x; + long int pixel; + + for (y = image->GetHeight() -1; y >= 0; y--) + { + if ( format == wxBMP_24BPP ) // 3 bytes per pixel red,green,blue + { + for ( x = 0; x < width; x++ ) + { + pixel = 3*(y*width + x); + + buffer[3*x ] = data[pixel+2]; + buffer[3*x + 1] = data[pixel+1]; + buffer[3*x + 2] = data[pixel]; + } + } + else if ((format == wxBMP_8BPP) || // 1 byte per pixel in color + (format == wxBMP_8BPP_PALETTE)) + { + for (x = 0; x < width; x++) + { + pixel = 3*(y*width + x); +#if wxUSE_PALETTE + buffer[x] = palette->GetPixel( data[pixel], + data[pixel+1], + data[pixel+2] ); +#else + // FIXME: what should this be? use some std palette maybe? + buffer[x] = 0; +#endif // wxUSE_PALETTE + } + } + else if ( format == wxBMP_8BPP_GREY ) // 1 byte per pix, rgb ave to grey + { + for (x = 0; x < width; x++) + { + pixel = 3*(y*width + x); + buffer[x] = (wxUint8)(.299*data[pixel] + + .587*data[pixel+1] + + .114*data[pixel+2]); + } + } + else if ( format == wxBMP_8BPP_RED ) // 1 byte per pixel, red as greys + { + for (x = 0; x < width; x++) + { + buffer[x] = (wxUint8)data[3*(y*width + x)]; + } + } + else if ( format == wxBMP_4BPP ) // 4 bpp in color + { + for (x = 0; x < width; x+=2) + { + pixel = 3*(y*width + x); + + // fill buffer, ignore if > width +#if wxUSE_PALETTE + buffer[x/2] = + ((wxUint8)palette->GetPixel(data[pixel], + data[pixel+1], + data[pixel+2]) << 4) | + (((x+1) > width) + ? 0 + : ((wxUint8)palette->GetPixel(data[pixel+3], + data[pixel+4], + data[pixel+5]) )); +#else + // FIXME: what should this be? use some std palette maybe? + buffer[x/2] = 0; +#endif // wxUSE_PALETTE + } + } + else if ( format == wxBMP_1BPP ) // 1 bpp in "color" + { + for (x = 0; x < width; x+=8) + { + pixel = 3*(y*width + x); + +#if wxUSE_PALETTE + buffer[x/8] = ((wxUint8)palette->GetPixel(data[pixel], data[pixel+1], data[pixel+2]) << 7) | + (((x+1) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+3], data[pixel+4], data[pixel+5]) << 6)) | + (((x+2) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+6], data[pixel+7], data[pixel+8]) << 5)) | + (((x+3) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+9], data[pixel+10], data[pixel+11]) << 4)) | + (((x+4) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+12], data[pixel+13], data[pixel+14]) << 3)) | + (((x+5) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+15], data[pixel+16], data[pixel+17]) << 2)) | + (((x+6) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+18], data[pixel+19], data[pixel+20]) << 1)) | + (((x+7) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+21], data[pixel+22], data[pixel+23]) )); +#else + // FIXME: what should this be? use some std palette maybe? + buffer[x/8] = 0; +#endif // wxUSE_PALETTE + } + } + else if ( format == wxBMP_1BPP_BW ) // 1 bpp B&W colormap from red color ONLY + { + for (x = 0; x < width; x+=8) + { + pixel = 3*(y*width + x); + + buffer[x/8] = + (((wxUint8)(data[pixel] /128.)) << 7) | + (((x+1) > width) ? 0 : (((wxUint8)(data[pixel+3] /128.)) << 6)) | + (((x+2) > width) ? 0 : (((wxUint8)(data[pixel+6] /128.)) << 5)) | + (((x+3) > width) ? 0 : (((wxUint8)(data[pixel+9] /128.)) << 4)) | + (((x+4) > width) ? 0 : (((wxUint8)(data[pixel+12]/128.)) << 3)) | + (((x+5) > width) ? 0 : (((wxUint8)(data[pixel+15]/128.)) << 2)) | + (((x+6) > width) ? 0 : (((wxUint8)(data[pixel+18]/128.)) << 1)) | + (((x+7) > width) ? 0 : (((wxUint8)(data[pixel+21]/128.)) )); + } + } + + if ( !stream.Write(buffer, row_width) ) + { + if (verbose) + wxLogError(_("BMP: Couldn't write data.")); + delete[] buffer; +#if wxUSE_PALETTE + delete palette; +#endif // wxUSE_PALETTE + delete q_image; + return false; + } + } + delete[] buffer; +#if wxUSE_PALETTE + delete palette; +#endif // wxUSE_PALETTE + delete q_image; + + return true; +} + + +typedef struct +{ + unsigned char r, g, b; +} _cmap; + +bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height, + int bpp, int ncolors, int comp, + wxFileOffset bmpOffset, wxInputStream& stream, + bool verbose, bool IsBmp, bool hasPalette) +{ + wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0; + int rshift = 0, gshift = 0, bshift = 0; + int rbits = 0, gbits = 0, bbits = 0; + wxInt32 dbuf[4]; + wxInt8 bbuf[4]; + wxUint8 aByte; + wxUint16 aWord; + + // allocate space for palette if needed: + _cmap *cmap; + + if ( bpp < 16 ) + { + cmap = new _cmap[ncolors]; + if ( !cmap ) + { + if (verbose) + wxLogError(_("BMP: Couldn't allocate memory.")); + return false; } } else cmap = NULL; - image->Create( width, height ); + // destroy existing here instead of: + image->Destroy(); + image->Create(width, height); + unsigned char *ptr = image->GetData(); - if (!ptr) + + if ( !ptr ) { - wxLogError( wxT("Cannot allocate RAM for RGB data in file.") ); - if (cmap) - free(cmap); - return FALSE; + if ( verbose ) + wxLogError( _("BMP: Couldn't allocate memory.") ); + if ( cmap ) + delete[] cmap; + return false; } - /* - * Reading the palette, if it exists. - */ - if (bpp < 16 && ncolors != 0) + // Reading the palette, if it exists: + if ( bpp < 16 && ncolors != 0 ) { + unsigned char* r = new unsigned char[ncolors]; + unsigned char* g = new unsigned char[ncolors]; + unsigned char* b = new unsigned char[ncolors]; for (int j = 0; j < ncolors; j++) { - stream.Read( bbuf, 4 ); - cmap[j].b = bbuf[0]; - cmap[j].g = bbuf[1]; - cmap[j].r = bbuf[2]; + if (hasPalette) + { + stream.Read(bbuf, 4); + cmap[j].b = bbuf[0]; + cmap[j].g = bbuf[1]; + cmap[j].r = bbuf[2]; + + r[j] = cmap[j].r; + g[j] = cmap[j].g; + b[j] = cmap[j].b; + } + else + { + //used in reading .ico file mask + r[j] = cmap[j].r = j * 255; + g[j] = cmap[j].g = j * 255; + b[j] = cmap[j].b = j * 255; + } } + +#if wxUSE_PALETTE + // Set the palette for the wxImage + image->SetPalette(wxPalette(ncolors, r, g, b)); +#endif // wxUSE_PALETTE + + delete[] r; + delete[] g; + delete[] b; } - else if (bpp == 16 || bpp == 32) + else if ( bpp == 16 || bpp == 32 ) { - if (comp == BI_BITFIELDS) + if ( comp == BI_BITFIELDS ) { int bit = 0; - stream.Read( dbuf, 4 * 3 ); - bmask = wxINT32_SWAP_ON_BE( dbuf[0] ); - gmask = wxINT32_SWAP_ON_BE( dbuf[1] ); - rmask = wxINT32_SWAP_ON_BE( dbuf[2] ); - /* find shift amount.. ugly, but i can't think of a better way */ - for (bit = 0; bit < bpp; bit++) + stream.Read(dbuf, 4 * 3); + rmask = wxINT32_SWAP_ON_BE(dbuf[0]); + gmask = wxINT32_SWAP_ON_BE(dbuf[1]); + bmask = wxINT32_SWAP_ON_BE(dbuf[2]); + // find shift amount (Least significant bit of mask) + for (bit = bpp-1; bit>=0; bit--) { if (bmask & (1 << bit)) bshift = bit; @@ -193,8 +551,18 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSE if (rmask & (1 << bit)) rshift = bit; } + // Find number of bits in mask (MSB-LSB+1) + for (bit = 0; bit < bpp; bit++) + { + if (bmask & (1 << bit)) + bbits = bit-bshift+1; + if (gmask & (1 << bit)) + gbits = bit-gshift+1; + if (rmask & (1 << bit)) + rbits = bit-rshift+1; + } } - else if (bpp == 16) + else if ( bpp == 16 ) { rmask = 0x7C00; gmask = 0x03E0; @@ -202,8 +570,11 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSE rshift = 10; gshift = 5; bshift = 0; + rbits = 5; + gbits = 5; + bbits = 5; } - else if (bpp == 32) + else if ( bpp == 32 ) { rmask = 0x00FF0000; gmask = 0x0000FF00; @@ -211,17 +582,22 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSE rshift = 16; gshift = 8; bshift = 0; + rbits = 8; + gbits = 8; + bbits = 8; } } /* * Reading the image data */ - stream.SeekI( start_offset + offset ); + if ( IsBmp ) + stream.SeekI(bmpOffset); // else icon, just carry on + unsigned char *data = ptr; /* set the whole image to the background color */ - if (bpp < 16 && (comp == BI_RLE4 || comp == BI_RLE8)) + if ( bpp < 16 && (comp == BI_RLE4 || comp == BI_RLE8) ) { for (int i = 0; i < width * height; i++) { @@ -232,49 +608,104 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSE ptr = data; } - int line = 0; - int column = 0; int linesize = ((width * bpp + 31) / 32) * 4; /* BMPs are stored upside down */ - for (line = (height - 1); line >= 0; line--) + for ( int line = (height - 1); line >= 0; line-- ) { int linepos = 0; - for (column = 0; column < width;) + for ( int column = 0; column < width ; ) { - if (bpp < 16) + if ( bpp < 16 ) { - int index = 0; linepos++; aByte = stream.GetC(); - if (bpp == 1) + if ( bpp == 1 ) { - int bit = 0; - for (bit = 0; bit < 8; bit++) + for (int bit = 0; bit < 8 && column < width; bit++) { - index = ((aByte & (0x80 >> bit)) ? 1 : 0); + int index = ((aByte & (0x80 >> bit)) ? 1 : 0); ptr[poffset] = cmap[index].r; ptr[poffset + 1] = cmap[index].g; ptr[poffset + 2] = cmap[index].b; column++; } } - else if (bpp == 4) + else if ( bpp == 4 ) { - if (comp == BI_RLE4) + if ( comp == BI_RLE4 ) { - wxLogError( wxT("Can't deal with 4bit encoded yet.") ); - image->Destroy(); - free(cmap); - return FALSE; + wxUint8 first; + first = aByte; + aByte = stream.GetC(); + if ( first == 0 ) + { + if ( aByte == 0 ) + { + if ( column > 0 ) + column = width; + } + else if ( aByte == 1 ) + { + column = width; + line = -1; + } + else if ( aByte == 2 ) + { + aByte = stream.GetC(); + column += aByte; + linepos = column * bpp / 4; + aByte = stream.GetC(); + line -= aByte; // upside down + } + else + { + int absolute = aByte; + wxUint8 nibble[2] ; + int readBytes = 0 ; + for (int k = 0; k < absolute; k++) + { + if ( !(k % 2 ) ) + { + ++readBytes ; + aByte = stream.GetC(); + nibble[0] = ( (aByte & 0xF0) >> 4 ) ; + nibble[1] = ( aByte & 0x0F ) ; + } + ptr[poffset ] = cmap[nibble[k%2]].r; + ptr[poffset + 1] = cmap[nibble[k%2]].g; + ptr[poffset + 2] = cmap[nibble[k%2]].b; + column++; + if ( k % 2 ) + linepos++; + } + if ( readBytes & 0x01 ) + aByte = stream.GetC(); + } + } + else + { + wxUint8 nibble[2] ; + nibble[0] = ( (aByte & 0xF0) >> 4 ) ; + nibble[1] = ( aByte & 0x0F ) ; + + for ( int l = 0; l < first && column < width; l++ ) + { + ptr[poffset ] = cmap[nibble[l%2]].r; + ptr[poffset + 1] = cmap[nibble[l%2]].g; + ptr[poffset + 2] = cmap[nibble[l%2]].b; + column++; + if ( l % 2 ) + linepos++; + } + } } else { - int nibble = 0; - for (nibble = 0; nibble < 2; nibble++) + for (int nibble = 0; nibble < 2 && column < width; nibble++) { - index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4)); - if (index >= 16) + int index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4)); + if ( index >= 16 ) index = 15; ptr[poffset] = cmap[index].r; ptr[poffset + 1] = cmap[index].g; @@ -283,25 +714,25 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSE } } } - else if (bpp == 8) + else if ( bpp == 8 ) { - if (comp == BI_RLE8) + if ( comp == BI_RLE8 ) { unsigned char first; first = aByte; aByte = stream.GetC(); - if (first == 0) + if ( first == 0 ) { - if (aByte == 0) + if ( aByte == 0 ) { /* column = width; */ } - else if (aByte == 1) + else if ( aByte == 1 ) { column = width; line = -1; } - else if (aByte == 2) + else if ( aByte == 2 ) { aByte = stream.GetC(); column += aByte; @@ -321,13 +752,13 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSE ptr[poffset + 2] = cmap[aByte].b; column++; } - if (absolute & 0x01) + if ( absolute & 0x01 ) aByte = stream.GetC(); } } else { - for (int l = 0; l < first; l++) + for ( int l = 0; l < first && column < width; l++ ) { ptr[poffset ] = cmap[aByte].r; ptr[poffset + 1] = cmap[aByte].g; @@ -346,70 +777,714 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSE // linepos += size; seems to be wrong, RR } } - } - else if (bpp == 24) - { - stream.Read( &bbuf, 3 ); - linepos += 3; - ptr[poffset ] = (unsigned char)bbuf[2]; - ptr[poffset + 1] = (unsigned char)bbuf[1]; - ptr[poffset + 2] = (unsigned char)bbuf[0]; - column++; - } - else if (bpp == 16) - { - unsigned char temp; - stream.Read( &aWord, 2 ); - aWord = wxUINT16_SWAP_ON_BE( aWord ); - linepos += 2; - temp = (aWord & rmask) >> rshift; - ptr[poffset] = temp; - temp = (aWord & gmask) >> gshift; - ptr[poffset + 1] = temp; - temp = (aWord & bmask) >> bshift; - ptr[poffset + 2] = temp; - column++; - } - else - { - unsigned char temp; - stream.Read( &aDword, 4 ); - aDword = wxINT32_SWAP_ON_BE( aDword ); - linepos += 4; - temp = (aDword & rmask) >> rshift; - ptr[poffset] = temp; - temp = (aDword & gmask) >> gshift; - ptr[poffset + 1] = temp; - temp = (aDword & bmask) >> bshift; - ptr[poffset + 2] = temp; - column++; - } - } - while ((linepos < linesize) && (comp != 1) && (comp != 2)) - { - stream.Read( &aByte, 1 ); - linepos += 1; - if (stream.LastError() != wxStream_NOERROR) - break; - } - } - if (cmap) - free(cmap); - - image->SetMask( FALSE ); - - return TRUE; + } + else if ( bpp == 24 ) + { + stream.Read(bbuf, 3); + linepos += 3; + ptr[poffset ] = (unsigned char)bbuf[2]; + ptr[poffset + 1] = (unsigned char)bbuf[1]; + ptr[poffset + 2] = (unsigned char)bbuf[0]; + column++; + } + else if ( bpp == 16 ) + { + unsigned char temp; + stream.Read(&aWord, 2); + aWord = wxUINT16_SWAP_ON_BE(aWord); + linepos += 2; + /* use the masks and calculated amonut of shift + to retrieve the color data out of the word. Then + shift it left by (8 - number of bits) such that + the image has the proper dynamic range */ + temp = (aWord & rmask) >> rshift << (8-rbits); + ptr[poffset] = temp; + temp = (aWord & gmask) >> gshift << (8-gbits); + ptr[poffset + 1] = temp; + temp = (aWord & bmask) >> bshift << (8-bbits); + ptr[poffset + 2] = temp; + column++; + } + else + { + unsigned char temp; + stream.Read(&aDword, 4); + aDword = wxINT32_SWAP_ON_BE(aDword); + linepos += 4; + temp = (aDword & rmask) >> rshift; + ptr[poffset] = temp; + temp = (aDword & gmask) >> gshift; + ptr[poffset + 1] = temp; + temp = (aDword & bmask) >> bshift; + ptr[poffset + 2] = temp; + column++; + } + } + while ( (linepos < linesize) && (comp != 1) && (comp != 2) ) + { + stream.Read(&aByte, 1); + linepos += 1; + if ( !stream ) + break; + } + } + + delete[] cmap; + + image->SetMask(false); + + const wxStreamError err = stream.GetLastError(); + return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF; } -bool wxBMPHandler::DoCanRead( wxInputStream& stream ) +bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream, + bool verbose, bool IsBmp) +{ + wxUint16 aWord; + wxInt32 dbuf[4]; + wxInt8 bbuf[4]; + + wxFileSize_t offset = 0; // keep gcc quiet + if ( IsBmp ) + { + // read the header off the .BMP format file + + offset = stream.TellI(); + if (offset == wxInvalidOffset) + offset = 0; + + stream.Read(bbuf, 2); + stream.Read(dbuf, 16); + } + else + { + stream.Read(dbuf, 4); + } + #if 0 // unused + wxInt32 size = wxINT32_SWAP_ON_BE(dbuf[0]); + #endif + offset = offset + wxINT32_SWAP_ON_BE(dbuf[2]); + + stream.Read(dbuf, 4 * 2); + int width = (int)wxINT32_SWAP_ON_BE(dbuf[0]); + int height = (int)wxINT32_SWAP_ON_BE(dbuf[1]); + if ( !IsBmp)height = height / 2; // for icons divide by 2 + + if ( width > 32767 ) + { + if (verbose) + wxLogError( _("DIB Header: Image width > 32767 pixels for file.") ); + return false; + } + if ( height > 32767 ) + { + if (verbose) + wxLogError( _("DIB Header: Image height > 32767 pixels for file.") ); + return false; + } + + stream.Read(&aWord, 2); + /* + TODO + int planes = (int)wxUINT16_SWAP_ON_BE( aWord ); + */ + stream.Read(&aWord, 2); + int bpp = (int)wxUINT16_SWAP_ON_BE(aWord); + if ( bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32 ) + { + if (verbose) + wxLogError( _("DIB Header: Unknown bitdepth in file.") ); + return false; + } + + stream.Read(dbuf, 4 * 4); + int comp = (int)wxINT32_SWAP_ON_BE(dbuf[0]); + if ( comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && + comp != BI_BITFIELDS ) + { + if (verbose) + wxLogError( _("DIB Header: Unknown encoding in file.") ); + return false; + } + + stream.Read(dbuf, 4 * 2); + int ncolors = (int)wxINT32_SWAP_ON_BE( dbuf[0] ); + if (ncolors == 0) + ncolors = 1 << bpp; + /* some more sanity checks */ + if (((comp == BI_RLE4) && (bpp != 4)) || + ((comp == BI_RLE8) && (bpp != 8)) || + ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32))) + { + if (verbose) + wxLogError( _("DIB Header: Encoding doesn't match bitdepth.") ); + return false; + } + + //read DIB; this is the BMP image or the XOR part of an icon image + if ( !DoLoadDib(image, width, height, bpp, ncolors, comp, offset, stream, + verbose, IsBmp, true) ) + { + if (verbose) + wxLogError( _("Error in reading image DIB .") ); + return false; + } + + if ( !IsBmp ) + { + //read Icon mask which is monochrome + //there is no palette, so we will create one + wxImage mask; + if ( !DoLoadDib(&mask, width, height, 1, 2, BI_RGB, offset, stream, + verbose, IsBmp, false) ) + { + if (verbose) + wxLogError( _("ICO: Error in reading mask DIB.") ); + return false; + } + image->SetMaskFromImage(mask, 255, 255, 255); + + } + + return true; +} + +bool wxBMPHandler::LoadFile(wxImage *image, wxInputStream& stream, + bool verbose, int WXUNUSED(index)) +{ + // Read a single DIB fom the file: + return LoadDib(image, stream, verbose, true/*isBmp*/); +} + +bool wxBMPHandler::DoCanRead(wxInputStream& stream) { unsigned char hdr[2]; - stream.Read(&hdr, 2); - stream.SeekI(-2, wxFromCurrent); - return (hdr[0] == 'B' && hdr[1] == 'M'); + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + return false; + + // do we have the BMP file signature? + return hdr[0] == 'B' && hdr[1] == 'M'; +} + +#endif // wxUSE_STREAMS + + +#if wxUSE_ICO_CUR +//----------------------------------------------------------------------------- +// wxICOHandler +//----------------------------------------------------------------------------- + +IMPLEMENT_DYNAMIC_CLASS(wxICOHandler, wxBMPHandler) + +#if wxUSE_STREAMS + +struct ICONDIRENTRY +{ + wxUint8 bWidth; // Width of the image + wxUint8 bHeight; // Height of the image (times 2) + wxUint8 bColorCount; // Number of colors in image (0 if >=8bpp) + wxUint8 bReserved; // Reserved + + // these two are different in icons and cursors: + // icon or cursor + wxUint16 wPlanes; // Color Planes or XHotSpot + wxUint16 wBitCount; // Bits per pixel or YHotSpot + + wxUint32 dwBytesInRes; // how many bytes in this resource? + wxUint32 dwImageOffset; // where in the file is this image +}; + +struct ICONDIR +{ + wxUint16 idReserved; // Reserved + wxUint16 idType; // resource type (1 for icons, 2 for cursors) + wxUint16 idCount; // how many images? +}; + + +bool wxICOHandler::SaveFile(wxImage *image, + wxOutputStream& stream, + bool verbose) + +{ + //sanity check; icon must be less than 127 pixels high and 255 wide + if ( image->GetHeight () > 127 ) + { + if ( verbose ) + wxLogError(_("ICO: Image too tall for an icon.")); + return false; + } + if ( image->GetWidth () > 255 ) + { + if ( verbose ) + wxLogError(_("ICO: Image too wide for an icon.")); + return false; + } + + int images = 1; // only generate one image + + // VS: This is a hack of sort - since ICO and CUR files are almost + // identical, we have all the meat in wxICOHandler and check for + // the actual (handler) type when the code has to distinguish between + // the two formats + int type = (this->GetType() == wxBITMAP_TYPE_CUR) ? 2 : 1; + + // write a header, (ICONDIR) + // Calculate the header size + wxUint32 offset = 3 * sizeof(wxUint16); + + ICONDIR IconDir; + IconDir.idReserved = 0; + IconDir.idType = wxUINT16_SWAP_ON_BE(type); + IconDir.idCount = wxUINT16_SWAP_ON_BE(images); + stream.Write(&IconDir.idReserved, sizeof(IconDir.idReserved)); + stream.Write(&IconDir.idType, sizeof(IconDir.idType)); + stream.Write(&IconDir.idCount, sizeof(IconDir.idCount)); + if ( !stream.IsOk() ) + { + if ( verbose ) + wxLogError(_("ICO: Error writing the image file!")); + return false; + } + + // for each iamage write a description ICONDIRENTRY: + ICONDIRENTRY icondirentry; + for (int i = 0; i < images; i++) + { + wxImage mask; + + if ( image->HasMask() ) + { + // make another image with black/white: + mask = image->ConvertToMono (image->GetMaskRed(), image->GetMaskGreen(), image->GetMaskBlue() ); + + // now we need to change the masked regions to black: + unsigned char r = image->GetMaskRed(); + unsigned char g = image->GetMaskGreen(); + unsigned char b = image->GetMaskBlue(); + if ( (r != 0) || (g != 0) || (b != 0) ) + { + // Go round and apply black to the masked bits: + int i, j; + for (i = 0; i < mask.GetWidth(); i++) + { + for (j = 0; j < mask.GetHeight(); j++) + { + if ((r == mask.GetRed(i, j)) && + (g == mask.GetGreen(i, j))&& + (b == mask.GetBlue(i, j)) ) + image->SetRGB(i, j, 0, 0, 0 ); + } + } + } + } + else + { + // just make a black mask all over: + mask = image->Copy(); + int i, j; + for (i = 0; i < mask.GetWidth(); i++) + for (j = 0; j < mask.GetHeight(); j++) + mask.SetRGB(i, j, 0, 0, 0 ); + } + // Set the formats for image and mask + // (Windows never saves with more than 8 colors): + image->SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_8BPP); + + // monochome bitmap: + mask.SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_1BPP_BW); + bool IsBmp = false; + bool IsMask = false; + + //calculate size and offset of image and mask + wxCountingOutputStream cStream; + bool bResult = SaveDib(image, cStream, verbose, IsBmp, IsMask); + if ( !bResult ) + { + if ( verbose ) + wxLogError(_("ICO: Error writing the image file!")); + return false; + } + IsMask = true; + + bResult = SaveDib(&mask, cStream, verbose, IsBmp, IsMask); + if ( !bResult ) + { + if ( verbose ) + wxLogError(_("ICO: Error writing the image file!")); + return false; + } + wxUint32 Size = cStream.GetSize(); + + // wxCountingOutputStream::Ok() always returns true for now and this + // "if" provokes VC++ warnings in optimized build +#if 0 + if ( !cStream.Ok() ) + { + if ( verbose ) + wxLogError(_("ICO: Error writing the image file!")); + return false; + } +#endif // 0 + + offset = offset + sizeof(ICONDIRENTRY); + + icondirentry.bWidth = image->GetWidth(); + icondirentry.bHeight = 2 * image->GetHeight(); + icondirentry.bColorCount = 0; + icondirentry.bReserved = 0; + icondirentry.wPlanes = wxUINT16_SWAP_ON_BE(1); + icondirentry.wBitCount = wxUINT16_SWAP_ON_BE(wxBMP_8BPP); + if ( type == 2 /*CUR*/) + { + int hx = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ? + image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) : + image->GetWidth() / 2; + int hy = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ? + image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) : + image->GetHeight() / 2; + + // actually write the values of the hot spot here: + icondirentry.wPlanes = wxUINT16_SWAP_ON_BE((wxUint16)hx); + icondirentry.wBitCount = wxUINT16_SWAP_ON_BE((wxUint16)hy); + } + icondirentry.dwBytesInRes = wxUINT32_SWAP_ON_BE(Size); + icondirentry.dwImageOffset = wxUINT32_SWAP_ON_BE(offset); + + // increase size to allow for the data written: + offset += Size; + + // write to stream: + stream.Write(&icondirentry.bWidth, sizeof(icondirentry.bWidth)); + stream.Write(&icondirentry.bHeight, sizeof(icondirentry.bHeight)); + stream.Write(&icondirentry.bColorCount, sizeof(icondirentry.bColorCount)); + stream.Write(&icondirentry.bReserved, sizeof(icondirentry.bReserved)); + stream.Write(&icondirentry.wPlanes, sizeof(icondirentry.wPlanes)); + stream.Write(&icondirentry.wBitCount, sizeof(icondirentry.wBitCount)); + stream.Write(&icondirentry.dwBytesInRes, sizeof(icondirentry.dwBytesInRes)); + stream.Write(&icondirentry.dwImageOffset, sizeof(icondirentry.dwImageOffset)); + if ( !stream.IsOk() ) + { + if ( verbose ) + wxLogError(_("ICO: Error writing the image file!")); + return false; + } + + // actually save it: + IsMask = false; + bResult = SaveDib(image, stream, verbose, IsBmp, IsMask); + if ( !bResult ) + { + if ( verbose ) + wxLogError(_("ICO: Error writing the image file!")); + return false; + } + IsMask = true; + + bResult = SaveDib(&mask, stream, verbose, IsBmp, IsMask); + if ( !bResult ) + { + if ( verbose ) + wxLogError(_("ICO: Error writing the image file!")); + return false; + } + + } // end of for loop + + return true; +} + +bool wxICOHandler::LoadFile(wxImage *image, wxInputStream& stream, + bool verbose, int index) +{ + stream.SeekI(0); + return DoLoadFile(image, stream, verbose, index); +} + +bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream, + bool WXUNUSED(verbose), int index) +{ + bool bResult wxDUMMY_INITIALIZE(false); + bool IsBmp = false; + + ICONDIR IconDir; + + wxFileOffset iPos = stream.TellI(); + stream.Read(&IconDir, sizeof(IconDir)); + wxUint16 nIcons = wxUINT16_SWAP_ON_BE(IconDir.idCount); + // nType is 1 for Icons, 2 for Cursors: + wxUint16 nType = wxUINT16_SWAP_ON_BE(IconDir.idType); + + // loop round the icons and choose the best one: + ICONDIRENTRY *pIconDirEntry = new ICONDIRENTRY[nIcons]; + ICONDIRENTRY *pCurrentEntry = pIconDirEntry; + int wMax = 0; + int colmax = 0; + int iSel = wxNOT_FOUND; + + for (int i = 0; i < nIcons; i++ ) + { + stream.Read(pCurrentEntry, sizeof(ICONDIRENTRY)); + // bHeight and bColorCount are wxUint8 + if ( pCurrentEntry->bWidth >= wMax ) + { + // see if we have more colors, ==0 indicates > 8bpp: + if ( pCurrentEntry->bColorCount == 0 ) + pCurrentEntry->bColorCount = 255; + if ( pCurrentEntry->bColorCount >= colmax ) + { + iSel = i; + wMax = pCurrentEntry->bWidth; + colmax = pCurrentEntry->bColorCount; + } + } + pCurrentEntry++; + } + + if ( index != -1 ) + { + // VS: Note that we *have* to run the loop above even if index != -1, because + // it reads ICONDIRENTRies. + iSel = index; + } + + if ( iSel == wxNOT_FOUND || iSel < 0 || iSel >= nIcons ) + { + wxLogError(_("ICO: Invalid icon index.")); + bResult = false; + } + else + { + // seek to selected icon: + pCurrentEntry = pIconDirEntry + iSel; + stream.SeekI(iPos + wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset), wxFromStart); + bResult = LoadDib(image, stream, true, IsBmp); + bool bIsCursorType = (this->GetType() == wxBITMAP_TYPE_CUR) || (this->GetType() == wxBITMAP_TYPE_ANI); + if ( bResult && bIsCursorType && nType == 2 ) + { + // it is a cursor, so let's set the hotspot: + image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, wxUINT16_SWAP_ON_BE(pCurrentEntry->wPlanes)); + image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, wxUINT16_SWAP_ON_BE(pCurrentEntry->wBitCount)); + } + } + delete[] pIconDirEntry; + return bResult; +} + +int wxICOHandler::GetImageCount(wxInputStream& stream) +{ + ICONDIR IconDir; + wxFileOffset iPos = stream.TellI(); + stream.SeekI(0); + stream.Read(&IconDir, sizeof(IconDir)); + wxUint16 nIcons = wxUINT16_SWAP_ON_BE(IconDir.idCount); + stream.SeekI(iPos); + return (int)nIcons; +} + +bool wxICOHandler::DoCanRead(wxInputStream& stream) +{ + stream.SeekI(0); + unsigned char hdr[4]; + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + return false; + + // hdr[2] is one for an icon and two for a cursor + return hdr[0] == '\0' && hdr[1] == '\0' && hdr[2] == '\1' && hdr[3] == '\0'; +} + +#endif // wxUSE_STREAMS + + +//----------------------------------------------------------------------------- +// wxCURHandler +//----------------------------------------------------------------------------- + +IMPLEMENT_DYNAMIC_CLASS(wxCURHandler, wxICOHandler) + +#if wxUSE_STREAMS + +bool wxCURHandler::DoCanRead(wxInputStream& stream) +{ + stream.SeekI(0); + unsigned char hdr[4]; + if ( !stream.Read(hdr, WXSIZEOF(hdr)) ) + return false; + + // hdr[2] is one for an icon and two for a cursor + return hdr[0] == '\0' && hdr[1] == '\0' && hdr[2] == '\2' && hdr[3] == '\0'; +} + +#endif // wxUSE_STREAMS + +//----------------------------------------------------------------------------- +// wxANIHandler +//----------------------------------------------------------------------------- + +IMPLEMENT_DYNAMIC_CLASS(wxANIHandler, wxCURHandler) + +#if wxUSE_STREAMS + +bool wxANIHandler::LoadFile(wxImage *image, wxInputStream& stream, + bool verbose, int index) +{ + wxInt32 FCC1, FCC2; + wxUint32 datalen; + + wxInt32 riff32; + memcpy( &riff32, "RIFF", 4 ); + wxInt32 list32; + memcpy( &list32, "LIST", 4 ); + wxInt32 ico32; + memcpy( &ico32, "icon", 4 ); + int iIcon = 0; + + stream.SeekI(0); + stream.Read(&FCC1, 4); + if ( FCC1 != riff32 ) + return false; + + // we have a riff file: + while (stream.IsOk()) + { + // we always have a data size + stream.Read(&datalen, 4); + datalen = wxINT32_SWAP_ON_BE(datalen) ; + //data should be padded to make even number of bytes + if (datalen % 2 == 1) datalen ++ ; + //now either data or a FCC + if ( (FCC1 == riff32) || (FCC1 == list32) ) + { + stream.Read(&FCC2, 4); + } + else + { + if (FCC1 == ico32 && iIcon >= index) + { + return DoLoadFile(image, stream, verbose, -1); + } + else + { + stream.SeekI(stream.TellI() + datalen); + if ( FCC1 == ico32 ) + iIcon ++; + } + } + + // try to read next data chunk: + stream.Read(&FCC1, 4); + } + return false; +} + +bool wxANIHandler::DoCanRead(wxInputStream& stream) +{ + wxInt32 FCC1, FCC2; + wxUint32 datalen ; + + wxInt32 riff32; + memcpy( &riff32, "RIFF", 4 ); + wxInt32 list32; + memcpy( &list32, "LIST", 4 ); + wxInt32 ico32; + memcpy( &ico32, "icon", 4 ); + wxInt32 anih32; + memcpy( &anih32, "anih", 4 ); + + stream.SeekI(0); + if ( !stream.Read(&FCC1, 4) ) + return false; + + if ( FCC1 != riff32 ) + return false; + + // we have a riff file: + while ( stream.IsOk() ) + { + if ( FCC1 == anih32 ) + return true; + // we always have a data size: + stream.Read(&datalen, 4); + datalen = wxINT32_SWAP_ON_BE(datalen) ; + //data should be padded to make even number of bytes + if (datalen % 2 == 1) datalen ++ ; + // now either data or a FCC: + if ( (FCC1 == riff32) || (FCC1 == list32) ) + { + stream.Read(&FCC2, 4); + } + else + { + stream.SeekI(stream.TellI() + datalen); + } + + // try to read next data chunk: + if ( !stream.Read(&FCC1, 4) ) + { + // reading failed -- either EOF or IO error, bail out anyhow + return false; + } + } + + return false; +} + +int wxANIHandler::GetImageCount(wxInputStream& stream) +{ + wxInt32 FCC1, FCC2; + wxUint32 datalen ; + + wxInt32 riff32; + memcpy( &riff32, "RIFF", 4 ); + wxInt32 list32; + memcpy( &list32, "LIST", 4 ); + wxInt32 ico32; + memcpy( &ico32, "icon", 4 ); + wxInt32 anih32; + memcpy( &anih32, "anih", 4 ); + + stream.SeekI(0); + stream.Read(&FCC1, 4); + if ( FCC1 != riff32 ) + return wxNOT_FOUND; + + // we have a riff file: + while ( stream.IsOk() ) + { + // we always have a data size: + stream.Read(&datalen, 4); + datalen = wxINT32_SWAP_ON_BE(datalen) ; + //data should be padded to make even number of bytes + if (datalen % 2 == 1) datalen ++ ; + // now either data or a FCC: + if ( (FCC1 == riff32) || (FCC1 == list32) ) + { + stream.Read(&FCC2, 4); + } + else + { + if ( FCC1 == anih32 ) + { + wxUint32 *pData = new wxUint32[datalen/4]; + stream.Read(pData, datalen); + int nIcons = wxINT32_SWAP_ON_BE(*(pData + 1)); + delete[] pData; + return nIcons; + } + else + stream.SeekI(stream.TellI() + datalen); + } + + // try to read next data chunk: + stream.Read(&FCC1, 4); + } + + return wxNOT_FOUND; } #endif // wxUSE_STREAMS +#endif // wxUSE_ICO_CUR +#endif // wxUSE_IMAGE