X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b11e8fb66699444389254085844a8084de9f0680..368bb6629314982118d25b79aeeddd4a82a36d44:/src/common/imagbmp.cpp diff --git a/src/common/imagbmp.cpp b/src/common/imagbmp.cpp index 6a09a824fa..6e4168e0f0 100644 --- a/src/common/imagbmp.cpp +++ b/src/common/imagbmp.cpp @@ -1,13 +1,13 @@ ///////////////////////////////////////////////////////////////////////////// // 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 ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "imagbmp.h" #endif @@ -43,7 +43,7 @@ #endif #ifdef __WXMSW__ -#include +#include "wx/msw/wrapwin.h" #endif //----------------------------------------------------------------------------- @@ -52,43 +52,70 @@ IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler) - #if wxUSE_STREAMS +#ifndef BI_RGB + #define BI_RGB 0 +#endif + +#ifndef BI_RLE8 +#define BI_RLE8 1 +#endif + +#ifndef BI_RLE4 +#define BI_RLE4 2 +#endif + +#ifndef BI_BITFIELDS +#define BI_BITFIELDS 3 +#endif + +#define poffset (line * width * 3 + column * 3) bool wxBMPHandler::SaveFile(wxImage *image, wxOutputStream& stream, bool verbose) { - wxCHECK_MSG( image, FALSE, _T("invalid pointer in wxBMPHandler::SaveFile") ); + return SaveDib(image, stream, verbose, true/*IsBmp*/, false/*IsMask*/); +} + +bool wxBMPHandler::SaveDib(wxImage *image, + wxOutputStream& stream, + bool verbose, + bool IsBmp, + bool IsMask) + +{ + wxCHECK_MSG( image, false, _T("invalid pointer in wxBMPHandler::SaveFile") ); - if (!image->Ok()) + if ( !image->Ok() ) { - if (verbose) wxLogError(_("BMP: Couldn't save invalid image.")); - return FALSE; + if ( verbose ) + wxLogError(_("BMP: Couldn't save invalid image.")); + return false; } // get the format of the BMP file to save, else use 24bpp unsigned format = wxBMP_24BPP; - if (image->HasOption(wxBMP_FORMAT)) - format = image->GetOptionInt(wxBMP_FORMAT); + if ( image->HasOption(wxIMAGE_OPTION_BMP_FORMAT) ) + format = image->GetOptionInt(wxIMAGE_OPTION_BMP_FORMAT); - unsigned bpp; // # of bits per pixel + wxUint16 bpp; // # of bits per pixel int palette_size; // # of color map entries, ie. 2^bpp colors // set the bpp and appropriate palette_size, and do additional checks - if ((format == wxBMP_1BPP) || (format == wxBMP_1BPP_BW)) + if ( (format == wxBMP_1BPP) || (format == wxBMP_1BPP_BW) ) { bpp = 1; palette_size = 2; } - else if (format == wxBMP_4BPP) + else if ( format == wxBMP_4BPP ) { bpp = 4; palette_size = 16; } - else if ((format == wxBMP_8BPP) || (format == wxBMP_8BPP_GREY) || - (format == wxBMP_8BPP_RED) || (format == wxBMP_8BPP_PALETTE)) + else if ( (format == wxBMP_8BPP) || (format == wxBMP_8BPP_GREY) || + (format == wxBMP_8BPP_RED) || (format == wxBMP_8BPP_PALETTE) ) { // need to set a wxPalette to use this, HOW TO CHECK IF VALID, SIZE? if ((format == wxBMP_8BPP_PALETTE) @@ -97,9 +124,9 @@ bool wxBMPHandler::SaveFile(wxImage *image, #endif // wxUSE_PALETTE ) { - if (verbose) - wxLogError(_("BMP: wImage doesn't have own wxPalette.")); - return FALSE; + if ( verbose ) + wxLogError(_("BMP: wxImage doesn't have own wxPalette.")); + return false; } bpp = 8; palette_size = 256; @@ -145,7 +172,14 @@ bool wxBMPHandler::SaveFile(wxImage *image, hdr.bih_size = wxUINT32_SWAP_ON_BE(hdr_size - 14); hdr.width = wxUINT32_SWAP_ON_BE(image->GetWidth()); - hdr.height = wxUINT32_SWAP_ON_BE(image->GetHeight()); + if ( IsBmp ) + { + 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 @@ -154,29 +188,42 @@ bool wxBMPHandler::SaveFile(wxImage *image, hdr.num_clrs = wxUINT32_SWAP_ON_BE(palette_size); // # colors in colormap hdr.num_signif_clrs = 0; // all colors are significant - 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) || - !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 ( IsBmp ) { - if (verbose) - wxLogError(_("BMP: Couldn't write the file header.")); - return FALSE; + 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 ) + { + 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; + } } wxPalette *palette = NULL; // entries for quantized images @@ -185,7 +232,7 @@ bool wxBMPHandler::SaveFile(wxImage *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)) + (format == wxBMP_8BPP) || (format == wxBMP_8BPP_PALETTE) ) { // make a new palette and quantize the image if (format != wxBMP_8BPP_PALETTE) @@ -209,10 +256,10 @@ bool wxBMPHandler::SaveFile(wxImage *image, unsigned char r, g, b; rgbquad = new wxUint8 [palette_size*4]; - for (i=0; iGetRGB( i, &r, &g, &b )) + if ( !palette->GetRGB(i, &r, &g, &b) ) #endif // wxUSE_PALETTE r = g = b = 0; @@ -223,19 +270,19 @@ bool wxBMPHandler::SaveFile(wxImage *image, } } // 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)) + else if ( (format == wxBMP_8BPP_GREY) || (format == wxBMP_8BPP_RED) || + (format == wxBMP_1BPP_BW) ) { - int i; rgbquad = new wxUint8 [palette_size*4]; - for (i=0; i 0) && (format == wxBMP_1BPP_BW)) i = 255; - rgbquad[i*4] = i; - rgbquad[i*4+1] = i; - rgbquad[i*4+2] = i; + // if 1BPP_BW then the value should be either 0 or 255 + wxUint8 c = (wxUint8)((i > 0) && (format == wxBMP_1BPP_BW) ? 255 : i); + + rgbquad[i*4] = + rgbquad[i*4+1] = + rgbquad[i*4+2] = c; rgbquad[i*4+3] = 0; } } @@ -243,17 +290,20 @@ bool wxBMPHandler::SaveFile(wxImage *image, // if the colormap was made, then it needs to be written if (rgbquad) { - if (!stream.Write(rgbquad, palette_size*4)) + if ( !IsMask ) { - if (verbose) - wxLogError(_("BMP: Couldn't write RGB color map.")); - delete [] rgbquad; + if ( !stream.Write(rgbquad, palette_size*4) ) + { + if (verbose) + wxLogError(_("BMP: Couldn't write RGB color map.")); + delete[] rgbquad; #if wxUSE_PALETTE - delete palette; + delete palette; #endif // wxUSE_PALETTE - delete q_image; - return FALSE; - } + delete q_image; + return false; + } + } delete []rgbquad; } @@ -266,11 +316,11 @@ bool wxBMPHandler::SaveFile(wxImage *image, int y; unsigned x; long int pixel; - for (y = image->GetHeight() -1 ; y >= 0; y--) + for (y = image->GetHeight() -1; y >= 0; y--) { - if (format == wxBMP_24BPP) // 3 bytes per pixel red,green,blue + if ( format == wxBMP_24BPP ) // 3 bytes per pixel red,green,blue { - for (x = 0; x < width; x++) + for ( x = 0; x < width; x++ ) { pixel = 3*(y*width + x); @@ -286,16 +336,16 @@ bool wxBMPHandler::SaveFile(wxImage *image, { pixel = 3*(y*width + x); #if wxUSE_PALETTE - buffer[x] = palette->GetPixel( data[pixel], - data[pixel+1], - data[pixel+2] ); + buffer[x] = (wxUint8)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 + else if ( format == wxBMP_8BPP_GREY ) // 1 byte per pix, rgb ave to grey { for (x = 0; x < width; x++) { @@ -305,14 +355,14 @@ bool wxBMPHandler::SaveFile(wxImage *image, .114*data[pixel+2]); } } - else if (format == wxBMP_8BPP_RED) // 1 byte per pixel, red as greys + 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 + else if ( format == wxBMP_4BPP ) // 4 bpp in color { for (x = 0; x < width; x+=2) { @@ -320,7 +370,7 @@ bool wxBMPHandler::SaveFile(wxImage *image, // fill buffer, ignore if > width #if wxUSE_PALETTE - buffer[x/2] = + buffer[x/2] = (wxUint8)( ((wxUint8)palette->GetPixel(data[pixel], data[pixel+1], data[pixel+2]) << 4) | @@ -328,53 +378,54 @@ bool wxBMPHandler::SaveFile(wxImage *image, ? 0 : ((wxUint8)palette->GetPixel(data[pixel+3], data[pixel+4], - data[pixel+5]) )); + 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" + 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) | + buffer[x/8] = (wxUint8)( + ((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]) )); + (((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 + 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.)) )); + buffer[x/8] = (wxUint8)( + (((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 ( !stream.Write(buffer, row_width) ) { if (verbose) wxLogError(_("BMP: Couldn't write data.")); @@ -383,7 +434,7 @@ bool wxBMPHandler::SaveFile(wxImage *image, delete palette; #endif // wxUSE_PALETTE delete q_image; - return FALSE; + return false; } } delete[] buffer; @@ -392,146 +443,85 @@ bool wxBMPHandler::SaveFile(wxImage *image, #endif // wxUSE_PALETTE delete q_image; - return TRUE; + return true; } +typedef struct +{ + unsigned char r, g, b; +} _cmap; -#ifndef BI_RGB -#define BI_RGB 0 -#define BI_RLE8 1 -#define BI_RLE4 2 -#endif - -#ifndef BI_BITFIELDS -#define BI_BITFIELDS 3 -#endif - -#define poffset (line * width * 3 + column * 3) - -bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) ) +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; - wxUint8 aByte; - wxUint16 aWord; + int rbits = 0, gbits = 0, bbits = 0; wxInt32 dbuf[4]; - wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0; wxInt8 bbuf[4]; - struct _cmap { - unsigned char r, g, b; - } *cmap = NULL; - - off_t start_offset = stream.TellI(); - if (start_offset == wxInvalidOffset) start_offset = 0; - - image->Destroy(); - - /* - * Read the BMP header - */ - - stream.Read( bbuf, 2 ); - stream.Read( dbuf, 4 * 4 ); - -#if 0 // unused - wxInt32 size = wxINT32_SWAP_ON_BE( dbuf[0] ); -#endif - wxInt32 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 (width > 32767) - { - if (verbose) - wxLogError( _("BMP: Image width > 32767 pixels for file.") ); - return FALSE; - } - if (height > 32767) - { - if (verbose) - wxLogError( _("BMP: 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( _("BMP: Unknown bitdepth in file.") ); - return FALSE; - } + wxUint8 aByte; + wxUint16 aWord; - 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( _("BMP: Unknown encoding in file.") ); - return FALSE; - } + // allocate space for palette if needed: + _cmap *cmap; - 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( _("BMP: Encoding doesn't match bitdepth.") ); - return FALSE; - } - if (bpp < 16) + if ( bpp < 16 ) { - cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors); - if (!cmap) + cmap = new _cmap[ncolors]; + if ( !cmap ) { if (verbose) - wxLogError( _("BMP: Couldn't allocate memory.") ); - return FALSE; + 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 ) { - if (verbose) + if ( verbose ) wxLogError( _("BMP: Couldn't allocate memory.") ); - if (cmap) - free(cmap); - return FALSE; + 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]; - - r[j] = cmap[j].r; - g[j] = cmap[j].g; - b[j] = cmap[j].b; + 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 = + g[j] = cmap[j].g = + b[j] = cmap[j].b = ( j ? 255 : 0 ); + } } #if wxUSE_PALETTE @@ -543,17 +533,17 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose 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; @@ -562,8 +552,18 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose 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; @@ -571,8 +571,11 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose rshift = 10; gshift = 5; bshift = 0; + rbits = 5; + gbits = 5; + bbits = 5; } - else if (bpp == 32) + else if ( bpp == 32 ) { rmask = 0x00FF0000; gmask = 0x0000FF00; @@ -580,17 +583,22 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose 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++) { @@ -601,50 +609,104 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose 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 && column < width; 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 ) { - if (verbose) - wxLogError( _("BMP: Cannot 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] = (wxUint8)( (aByte & 0xF0) >> 4 ) ; + nibble[1] = (wxUint8)( 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] = (wxUint8)( (aByte & 0xF0) >> 4 ) ; + nibble[1] = (wxUint8)( 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 && column < width; 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; @@ -653,25 +715,25 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose } } } - 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; @@ -691,13 +753,13 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose ptr[poffset + 2] = cmap[aByte].b; column++; } - if (absolute & 0x01) + if ( absolute & 0x01 ) aByte = stream.GetC(); } } else { - for (int l = 0; l < first && column < width; l++) + for ( int l = 0; l < first && column < width; l++ ) { ptr[poffset ] = cmap[aByte].r; ptr[poffset + 1] = cmap[aByte].g; @@ -716,70 +778,714 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose // 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 = (unsigned char)((aWord & rmask) >> rshift << (8-rbits)); + ptr[poffset] = temp; + temp = (unsigned char)((aWord & gmask) >> gshift << (8-gbits)); + ptr[poffset + 1] = temp; + temp = (unsigned char)((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 = (unsigned char)((aDword & rmask) >> rshift); + ptr[poffset] = temp; + temp = (unsigned char)((aDword & gmask) >> gshift); + ptr[poffset + 1] = temp; + temp = (unsigned char)((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::LoadDib(wxImage *image, wxInputStream& stream, + bool verbose, bool IsBmp) +{ + wxUint16 aWord; + wxInt32 dbuf[4]; + wxInt8 bbuf[4]; + + wxFileOffset 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 = wxINT32_SWAP_ON_BE((int)dbuf[0]); + int height = wxINT32_SWAP_ON_BE((int)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 = wxUINT16_SWAP_ON_BE((int)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 = wxINT32_SWAP_ON_BE((int)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 = wxINT32_SWAP_ON_BE( (int)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 ) +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((wxUint16)type); + IconDir.idCount = wxUINT16_SWAP_ON_BE((wxUint16)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 = (wxUint8)image->GetWidth(); + icondirentry.bHeight = (wxUint8)(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