/////////////////////////////////////////////////////////////////////////////
// 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
-*/
+#ifdef __GNUG__
+#pragma implementation "imagbmp.h"
+#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#pragma hdrstop
#endif
-#include "wx/image.h"
+#include "wx/defs.h"
+
+#if wxUSE_IMAGE && wxUSE_STREAMS
+
+#include "wx/imagbmp.h"
#include "wx/bitmap.h"
#include "wx/debug.h"
#include "wx/log.h"
#include "wx/wfstream.h"
#include "wx/intl.h"
#include "wx/module.h"
+#include "wx/quantize.h"
// For memcpy
#include <string.h>
// wxBMPHandler
//-----------------------------------------------------------------------------
-#if !USE_SHARED_LIBRARIES
IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
-#endif
-
-#if wxUSE_STREAMS
#ifndef BI_RGB
#define BI_RGB 0
#define poffset (line * width * 3 + column * 3)
-bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool WXUNUSED(verbose) )
+bool wxBMPHandler::SaveFile(wxImage *image,
+ wxOutputStream& stream,
+ bool verbose)
+{
+ return SaveDib(image, stream, verbose, TRUE/*IsBmp*/, FALSE/*IsMask*/);
+}
+
+bool wxBMPHandler::SaveDib(wxImage *image,
+ wxOutputStream& stream,
+ bool verbose,
+ bool IsBmp,
+ bool IsMask)
+
{
- 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;
+ wxCHECK_MSG( image, FALSE, _T("invalid pointer in wxBMPHandler::SaveFile") );
- off_t start_offset = stream.TellI();
+ if ( !image->Ok() )
+ {
+ if ( verbose )
+ wxLogError(_("BMP: Couldn't save invalid image."));
+ return FALSE;
+ }
- image->Destroy();
+ // 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);
- /*
- * Read the BMP header
- */
+ unsigned 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) )
+ {
+ bpp = 1;
+ palette_size = 2;
+ }
+ 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) )
+ {
+ // 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;
+ }
- stream.Read( &bbuf, 2 );
- stream.Read( dbuf, 4 * 4 );
+ 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
-#if 0 // unused
- wxInt32 size = wxINT32_SWAP_ON_BE( dbuf[0] );
-#endif
- wxInt32 offset = wxINT32_SWAP_ON_BE( dbuf[2] );
+ 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
- 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)
+ // 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);
+
+ hdr.bih_size = wxUINT32_SWAP_ON_BE(hdr_size - 14);
+ hdr.width = wxUINT32_SWAP_ON_BE(image->GetWidth());
+ if ( IsBmp )
{
- wxLogError( _T("Image width > 32767 pixels for file.") );
- return FALSE;
+ hdr.height = wxUINT32_SWAP_ON_BE(image->GetHeight());
}
- if (height > 32767)
+ else
{
- wxLogError( _T("Image height > 32767 pixels for file.") );
- return FALSE;
+ 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
+
+ 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 )
+ {
+ 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
+ wxUint8 *rgbquad = NULL; // for the RGBQUAD bytes for the colormap
+ wxImage *q_image = NULL; // destination for quantized image
- 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 <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( _T("unknown bitdepth in file.") );
- 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;
+ }
}
+ // 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) )
+ {
+ int i;
+ rgbquad = new wxUint8 [palette_size*4];
- 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)
+ for (i = 0; i < palette_size; i++)
+ {
+ // 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)
{
- wxLogError( _T("unknown encoding in Windows BMP file.") );
- return FALSE;
+ 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;
}
- 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)))
+ // 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--)
{
- wxLogError( _T("encoding of BMP doesn't match bitdepth.") );
- return FALSE;
+ 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;
+ }
}
- if (bpp < 16)
+ 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,
+ off_t bmpOffset, wxInputStream& stream,
+ bool verbose, bool IsBmp, bool hasPalette)
+{
+ wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0;
+ int rshift = 0, gshift = 0, bshift = 0;
+ wxInt32 dbuf[4];
+ wxInt8 bbuf[4];
+ wxUint8 aByte;
+ wxUint16 aWord;
+
+ // allocate space for palette if needed:
+ _cmap *cmap = NULL;
+
+ if ( bpp < 16 )
{
- cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
- if (!cmap)
+ cmap = new _cmap[ncolors];
+ if ( !cmap )
{
- wxLogError( _T("Cannot allocate RAM for color map in BMP file.") );
+ 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( _T("Cannot allocate RAM for RGB data in file.") );
- if (cmap)
- free(cmap);
+ 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 */
+ 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++)
{
if (bmask & (1 << bit))
rshift = bit;
}
}
- else if (bpp == 16)
+ else if ( bpp == 16 )
{
rmask = 0x7C00;
gmask = 0x03E0;
gshift = 5;
bshift = 0;
}
- else if (bpp == 32)
+ else if ( bpp == 32 )
{
rmask = 0x00FF0000;
gmask = 0x0000FF00;
/*
* 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++)
{
int linesize = ((width * bpp + 31) / 32) * 4;
/* BMPs are stored upside down */
- for (line = (height - 1); line >= 0; line--)
+ for ( line = (height - 1); line >= 0; line-- )
{
int linepos = 0;
- for (column = 0; column < width;)
+ for ( 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 (bit = 0; bit < 8 && column < width; bit++)
{
index = ((aByte & (0x80 >> bit)) ? 1 : 0);
ptr[poffset] = cmap[index].r;
column++;
}
}
- else if (bpp == 4)
+ else if ( bpp == 4 )
{
- if (comp == BI_RLE4)
+ if ( comp == BI_RLE4 )
{
- wxLogError( _T("Can't deal with 4bit encoded yet.") );
+ if ( verbose )
+ wxLogError(_("DIB Header: Cannot deal with 4bit encoded yet."));
image->Destroy();
- free(cmap);
+ delete[] cmap;
return FALSE;
}
else
{
int nibble = 0;
- for (nibble = 0; nibble < 2; nibble++)
+ for (nibble = 0; nibble < 2 && column < width; nibble++)
{
index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4));
- if (index >= 16)
+ if ( index >= 16 )
index = 15;
ptr[poffset] = cmap[index].r;
ptr[poffset + 1] = cmap[index].g;
}
}
}
- 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;
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;
}
}
}
- else if (bpp == 24)
+ else if ( bpp == 24 )
{
- stream.Read( &bbuf, 3 );
+ 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)
+ else if ( bpp == 16 )
{
unsigned char temp;
- stream.Read( &aWord, 2 );
- aWord = wxUINT16_SWAP_ON_BE( aWord );
+ 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) >> gshift;
+ temp = (aWord & bmask) >> bshift;
ptr[poffset + 2] = temp;
column++;
}
else
{
unsigned char temp;
- stream.Read( &aDword, 4 );
- aDword = wxINT32_SWAP_ON_BE( aDword );
+ stream.Read(&aDword, 4);
+ aDword = wxINT32_SWAP_ON_BE(aDword);
linepos += 4;
temp = (aDword & rmask) >> rshift;
ptr[poffset] = temp;
column++;
}
}
- while ((linepos < linesize) && (comp != 1) && (comp != 2))
+ while ( (linepos < linesize) && (comp != 1) && (comp != 2) )
{
- stream.Read( &aByte, 1 );
+ stream.Read(&aByte, 1);
linepos += 1;
- if (stream.LastError() != wxStream_NOERROR)
+ if ( stream.LastError() != wxStream_NOERROR )
break;
}
}
if (cmap)
- free(cmap);
+ delete[] cmap;
- image->SetMask( FALSE );
+ image->SetMask(FALSE);
- return TRUE;
+ return stream.IsOk();
}
-#endif // wxUSE_STREAMS
+bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream,
+ bool verbose, bool IsBmp)
+{
+ wxUint16 aWord;
+ wxInt32 dbuf[4];
+ wxInt8 bbuf[4];
+ off_t offset;
+
+ 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 wxUSE_ICO_CUR
+//-----------------------------------------------------------------------------
+// wxICOHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxICOHandler, wxBMPHandler)
+
+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)
+
+{
+ bool bResult = FALSE;
+ //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(wxBMP_FORMAT, wxBMP_8BPP);
+
+ // monochome bitmap:
+ mask.SetOption(wxBMP_FORMAT, wxBMP_1BPP_BW);
+ bool IsBmp = FALSE;
+ bool IsMask = FALSE;
+
+ //calculate size and offset of image and mask
+ wxCountingOutputStream cStream;
+ 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(wxCUR_HOTSPOT_X) ?
+ image->GetOptionInt(wxCUR_HOTSPOT_X) :
+ image->GetWidth() / 2;
+ int hy = image->HasOption(wxCUR_HOTSPOT_Y) ?
+ image->GetOptionInt(wxCUR_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 verbose, int index)
+{
+ bool bResult = FALSE;
+ bool IsBmp = FALSE;
+
+ ICONDIR IconDir;
+
+ off_t 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(wxCUR_HOTSPOT_X, wxUINT16_SWAP_ON_BE(pCurrentEntry->wPlanes));
+ image->SetOption(wxCUR_HOTSPOT_Y, wxUINT16_SWAP_ON_BE(pCurrentEntry->wBitCount));
+ }
+ }
+ delete[] pIconDirEntry;
+ return bResult;
+}
+
+int wxICOHandler::GetImageCount(wxInputStream& stream)
+{
+ ICONDIR IconDir;
+ off_t 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)
+{
+ unsigned char hdr[4];
+ off_t iPos = stream.TellI();
+ stream.SeekI (0);
+ stream.Read(hdr, 4);
+ stream.SeekI(iPos);
+ //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');
+}
+
+
+
+//-----------------------------------------------------------------------------
+// wxCURHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxCURHandler, wxICOHandler)
+
+bool wxCURHandler::DoCanRead(wxInputStream& stream)
+{
+ unsigned char hdr[4];
+ off_t iPos = stream.TellI();
+ stream.SeekI (0);
+ stream.Read(hdr, 4);
+ stream.SeekI(iPos);
+ //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');
+}
+
+//-----------------------------------------------------------------------------
+// wxANIHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxANIHandler, wxCURHandler)
+
+bool wxANIHandler::LoadFile(wxImage *image, wxInputStream& stream,
+ bool verbose, int index)
+{
+ wxInt32 FCC1, FCC2;
+ wxUint32 datalen;
+ static const char *rifftxt = "RIFF";
+ static const char *listtxt = "LIST";
+ static const char *icotxt = "icon";
+
+ wxInt32 *riff32 = (wxInt32 *) rifftxt;
+ wxInt32 *list32 = (wxInt32 *) listtxt;
+ wxInt32 *ico32 = (wxInt32 *) icotxt;
+
+ 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);
+
+ //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 ;
+ static const char *rifftxt = "RIFF";
+ static const char *listtxt = "LIST";
+ static const char *anihtxt = "anih";
+
+ wxInt32 *riff32 = (wxInt32 *) rifftxt;
+ wxInt32 *list32 = (wxInt32 *) listtxt;
+ wxInt32 *anih32 = (wxInt32 *) anihtxt;
+
+ stream.SeekI(0);
+ stream.Read(&FCC1, 4);
+ 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);
+
+ // 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:
+ stream.Read(&FCC1, 4);
+ }
+
+ return FALSE;
+}
+
+int wxANIHandler::GetImageCount(wxInputStream& stream)
+{
+ wxInt32 FCC1, FCC2;
+ wxUint32 datalen ;
+ static const char *rifftxt = "RIFF";
+ static const char *listtxt = "LIST";
+ static const char *anihtxt = "anih";
+
+ wxInt32 *riff32 = (wxInt32 *) rifftxt;
+ wxInt32 *list32 = (wxInt32 *) listtxt;
+ wxInt32 *anih32 = (wxInt32 *) anihtxt;
+
+ 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);
+
+ // 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 = *(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_ICO_CUR
+#endif // wxUSE_IMAGE && wxUSE_STREAMS
projects / wxWidgets.git / blobdiff