// 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
+
+#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 BI_RLE8 1
-#define BI_RLE4 2
-#endif
-#ifndef BI_BITFIELDS
-#define BI_BITFIELDS 3
-#endif
+#if wxUSE_STREAMS
-#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)
{
- 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
- stream.Read( &bbuf, 2 );
- stream.Read( dbuf, 4 * 4 );
+ // 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: wImage doesn't have own wxPalette."));
+ return FALSE;
+ }
+ bpp = 8;
+ palette_size = 256;
+ }
+ else // you get 24bpp
+ {
+ format = wxBMP_24BPP;
+ bpp = 24;
+ palette_size = 0;
+ }
-#if 0 // unused
- wxInt32 size = wxINT32_SWAP_ON_BE( dbuf[0] );
-#endif
- wxInt32 offset = wxINT32_SWAP_ON_BE( dbuf[2] );
+ 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
- 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)
+ struct
{
- wxLogError( T("Image width > 32767 pixels for file.") );
+ // 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);
+
+ 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());
+ 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 (// 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 (verbose)
+ wxLogError(_("BMP: Couldn't write the file header."));
return FALSE;
}
- if (height > 32767)
+
+ 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( T("Image height > 32767 pixels for 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( &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)
+ 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 bitdepth in file.") );
- return FALSE;
+ 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 * 4 );
- int comp = (int)wxINT32_SWAP_ON_BE( dbuf[0] );
- if (comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && comp != BI_BITFIELDS)
+ // 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("unknown encoding in Windows BMP file.") );
- 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;
+ }
}
+ delete[] buffer;
+#if wxUSE_PALETTE
+ delete palette;
+#endif // wxUSE_PALETTE
+ delete q_image;
- 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)))
+ return TRUE;
+}
+
+
+
+#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)
+
+
+
+struct ICONDIRENTRY
{
- wxLogError( T("encoding of BMP doesn't match bitdepth.") );
- return FALSE;
+ 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
+ wxUint16 wPlanes; // Color Planes
+ wxUint16 wBitCount; // Bits per pixel
+ 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)
+ wxUint16 idCount; // how many images?
+} ;
+
+
+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
+ struct _cmap
+ {
+ unsigned char r, g, b;
}
+ *cmap = NULL;
+
if (bpp < 16)
{
cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
if (!cmap)
{
- wxLogError( T("Cannot allocate RAM for color map in BMP file.") );
+ if (verbose)
+ wxLogError( _("Loading DIB : Couldn't allocate memory.") );
return FALSE;
}
}
else
cmap = NULL;
+ // destroy existing here instead of
+ image->Destroy();
image->Create( width, height );
unsigned char *ptr = image->GetData();
if (!ptr)
{
- wxLogError( T("Cannot allocate RAM for RGB data in file.") );
+ if (verbose)
+ wxLogError( _("Loading DIB : Couldn't allocate memory.") );
if (cmap)
free(cmap);
return FALSE;
}
-
/*
* 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++)
{
+ 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)
{
/*
* 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 == 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;
{
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);
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)
}
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)
{
- 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] = temp;
temp = (aWord & gmask) >> gshift;
ptr[poffset + 1] = temp;
- temp = (aWord & bmask) >> gshift;
+ temp = (aWord & bmask) >> bshift;
ptr[poffset + 2] = temp;
column++;
}
image->SetMask( FALSE );
+ return stream.IsOk();
+}
+
+
+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::CanRead( wxInputStream& stream )
+
+bool wxBMPHandler::LoadFile ( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
+{
+ bool IsBmp = TRUE;
+ //Read a single DIB fom the file
+ return LoadDib ( image, stream, verbose, IsBmp ) ;
+}
+
+
+
+bool wxICOHandler::LoadFile ( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
+{
+ bool bResult = FALSE ;
+ bool IsBmp = FALSE;
+
+ ICONDIR m_IconDir ;
+ stream.Read (&m_IconDir, sizeof(m_IconDir));
+ wxUint16 nIcons = wxUINT16_SWAP_ON_BE ( m_IconDir.idCount ) ;
+
+ //loop round the icons and choose the best one
+ ICONDIRENTRY * pIconDirEntry = new ICONDIRENTRY [nIcons];
+ ICONDIRENTRY * pCurrentEntry = pIconDirEntry ;
+ int i ;
+ int wMax = 0 ;
+ int colmax = 0 ;
+ int iSel = wxNOT_FOUND ;
+ for (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 (iSel == wxNOT_FOUND)
+ {
+ bResult = FALSE;
+ }
+ else
+ {
+ //seek to selected icon
+ pCurrentEntry = pIconDirEntry + iSel ;
+ stream.SeekI (wxUINT32_SWAP_ON_BE ( pCurrentEntry -> dwImageOffset ), wxFromStart ) ;
+ bResult = LoadDib ( image, stream, TRUE, IsBmp );
+ }
+ delete [] pIconDirEntry ;
+ return bResult
+ ;
+}
+
+bool wxICOHandler::SaveFile(wxImage *image,
+ wxOutputStream& stream,
+ bool verbose)
+{
+ return FALSE ;
+}
+
+bool wxBMPHandler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[2];
-
- stream.Read(&hdr, 2);
+
+ stream.Read(hdr, 2);
stream.SeekI(-2, wxFromCurrent);
return (hdr[0] == 'B' && hdr[1] == 'M');
}
-#endif // wxUSE_STREAMS
+bool wxICOHandler::DoCanRead( wxInputStream& stream )
+{
+ unsigned char hdr[4];
+
+ stream.Read(hdr, 4);
+ stream.SeekI(-4, wxFromCurrent);
+ return (hdr[0] == '\0' && hdr[1] == '\0' && hdr[2] == '\1' && hdr[3] == '\0');
+}
+#endif // wxUSE_STREAMS
+#endif // wxUSE_IMAGE
projects / wxWidgets.git / blobdiff