#include "wx/wfstream.h"
#include "wx/intl.h"
#include "wx/module.h"
+#include "wx/quantize.h"
// For memcpy
#include <string.h>
#endif
//-----------------------------------------------------------------------------
-// wxBMPHandler
+// wxBMPHandler & wxICOHandler
//-----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
#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
+
+#define poffset (line * width * 3 + column * 3)
+
+
+
+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
+ 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 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: Error Image too tall for an icon.") );
+ return FALSE;
+ }
+ if (image -> GetWidth () > 255 )
+ {
+ if (verbose)
+ wxLogError( _("ICO: Error Image too wide for an icon.") );
+ return FALSE;
+ }
+
+ // only generate one image
+ int m_images = 1 ;
+
+ // write a header, (ICONDIR)
+ // Calculate the header size
+ wxUint32 m_offset = 3 * sizeof(wxUint16);
+
+ ICONDIR m_IconDir ;
+ m_IconDir.idReserved = 0 ;
+ m_IconDir.idType = wxUINT16_SWAP_ON_BE (1);
+ m_IconDir.idCount = wxUINT16_SWAP_ON_BE (m_images);
+ stream.Write(&m_IconDir.idReserved, sizeof(m_IconDir.idReserved));
+ stream.Write(&m_IconDir.idType, sizeof(m_IconDir.idType));
+ stream.Write(&m_IconDir.idCount, sizeof(m_IconDir.idCount));
+ if ( !stream.IsOk () )
+ {
+ if (verbose)
+ wxLogError( _("ICO: Error writing ICONDIR header.") );
+ return FALSE;
+ }
+
+ // for each iamage write a description ICONDIRENTRY
+ ICONDIRENTRY m_icondirentry ;
+ int i ;
+ for ( i = 0; i < m_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 calculating size of XOR DIB .") );
+ return FALSE;
+ }
+ IsMask = TRUE ;
+ bResult = SaveDib ( &mask, cStream, verbose, IsBmp, IsMask ) ;
+ if (!bResult)
+ {
+ if (verbose)
+ wxLogError( _("ICO: Error calculating size of Mask DIB .") );
+ return FALSE;
+ }
+ wxUint32 m_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 calculating size of DIB .") );
+ return FALSE;
+ }
+#endif // 0
+
+ m_offset = m_offset + sizeof(ICONDIRENTRY) ;
+
+ m_icondirentry. bWidth = image -> GetWidth () ;
+ m_icondirentry. bHeight = 2 * image -> GetHeight () ;
+ m_icondirentry. bColorCount = 0 ;
+ m_icondirentry. bReserved = 0 ;
+ m_icondirentry. wPlanes = wxUINT16_SWAP_ON_BE(1);
+ m_icondirentry. wBitCount = wxUINT16_SWAP_ON_BE(wxBMP_8BPP) ;
+ m_icondirentry. dwBytesInRes = wxUINT32_SWAP_ON_BE(m_Size);
+ m_icondirentry. dwImageOffset = wxUINT32_SWAP_ON_BE(m_offset);
+
+ //increase size to allow for the data wriitten
+ m_offset = m_offset + m_Size ;
+
+ //write to stream
+ stream.Write(&m_icondirentry. bWidth, sizeof(m_icondirentry. bWidth) );
+ stream.Write(&m_icondirentry. bHeight, sizeof(m_icondirentry. bHeight) );
+ stream.Write(&m_icondirentry. bColorCount, sizeof(m_icondirentry. bColorCount) );
+ stream.Write(&m_icondirentry. bReserved, sizeof(m_icondirentry. bReserved) );
+ stream.Write(&m_icondirentry. wPlanes, sizeof(m_icondirentry. wPlanes) );
+ stream.Write(&m_icondirentry. wBitCount, sizeof(m_icondirentry. wBitCount) );
+ stream.Write(&m_icondirentry. dwBytesInRes, sizeof(m_icondirentry. dwBytesInRes) );
+ stream.Write(&m_icondirentry. dwImageOffset, sizeof(m_icondirentry. dwImageOffset) );
+ if ( !stream.IsOk () )
+ {
+ if (verbose)
+ wxLogError( _("ICO: Error writing ICONDIRENTRY header.") );
+ return FALSE;
+ }
+ //actually save it
+ IsMask = FALSE ;
+ bResult = SaveDib ( image, stream, verbose, IsBmp, IsMask ) ;
+ if (!bResult)
+ {
+ if (verbose)
+ wxLogError( _("ICO: Error writing XOR DIB .") );
+ return FALSE;
+ }
+ IsMask = TRUE ;
+ bResult = SaveDib ( &mask, stream, verbose, IsBmp, IsMask ) ;
+ if (!bResult)
+ {
+ if (verbose)
+ wxLogError( _("ICO: Error writing Mask DIB .") );
+ return FALSE;
+ }
+
+ } // end of for loop
+ return TRUE ;
+}
+
+
bool wxBMPHandler::SaveFile(wxImage *image,
wxOutputStream& stream,
bool verbose)
+{
+ bool IsBmp = TRUE;
+ bool IsMask = FALSE ;
+ return SaveDib( image, stream, verbose, IsBmp, IsMask ) ;
+}
+
+bool wxBMPHandler::SaveDib(wxImage *image,
+ wxOutputStream& stream,
+ bool verbose,
+ bool IsBmp,
+ bool IsMask)
+
{
wxCHECK_MSG( image, FALSE, _T("invalid pointer in wxBMPHandler::SaveFile") );
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);
+
+ 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: 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;
+ }
+
unsigned width = image->GetWidth();
- unsigned row_width = width * 3 +
- (((width % 4) == 0) ? 0 : (4 - (width * 3) % 4));
- // each row must be aligned to dwords
+ unsigned row_padding = (4 - int(width*bpp/8.0) % 4) % 4; // # bytes to pad to dword
+ unsigned row_width = int(width * bpp/8.0) + row_padding; // # of bytes per row
+
struct
{
// BitmapHeader:
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 +
- row_width * image->GetHeight()
- );
+ 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);
+ 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)
+ {
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(24); // always TrueColor
+ 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 = 0; // maximal possible = 2^24
- hdr.num_signif_clrs = 0; // all colors are significant
+ 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) ||
+ !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) ||
)
{
if (verbose)
- wxLogError(_("BMP: Couldn't write the file header."));
+ 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
+
+ // 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))
+ {
+ // 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];
+
+ 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)
+ {
+ if (!IsMask)
+ {
+ if (!stream.Write(rgbquad, palette_size*4))
+ {
+ if (verbose)
+ wxLogError(_("BMP: Couldn't write RGB color map."));
+ delete [] rgbquad;
+#if wxUSE_PALETTE
+ delete palette;
+#endif // wxUSE_PALETTE
+ delete q_image;
+ return FALSE;
+ }
+ }
+ delete []rgbquad;
+ }
+
+ // pointer to the image data, use quantized if available
wxUint8 *data = (wxUint8*) image->GetData();
+ if (q_image) if (q_image->Ok()) data = (wxUint8*) q_image->GetData();
+
wxUint8 *buffer = new wxUint8[row_width];
- wxUint8 tmpvar;
memset(buffer, 0, row_width);
int y; unsigned x;
+ long int pixel;
for (y = image->GetHeight() -1 ; y >= 0; y--)
{
- memcpy(buffer, data + y * 3 * width, 3 * width);
- for (x = 0; x < width; x++)
+ 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))
{
- tmpvar = buffer[3 * x + 0];
- buffer[3 * x + 0] = buffer[3 * x + 2];
- buffer[3 * x + 2] = tmpvar;
+ for (x = 0; x < width; x++)
+ {
+ pixel = 3*(y*width + x);
+#if wxUSE_PALETTE
+ buffer[x] = palette->GetPixel( data[pixel],
+ data[pixel+1],
+ data[pixel+2] );
+#else
+ // FIXME: what should this be? use some std palette maybe?
+ buffer[x] = 0;
+#endif // wxUSE_PALETTE
+ }
+ }
+ else if (format == wxBMP_8BPP_GREY) // 1 byte per pix, rgb ave to grey
+ {
+ for (x = 0; x < width; x++)
+ {
+ pixel = 3*(y*width + x);
+ buffer[x] = (wxUint8)(.299*data[pixel] +
+ .587*data[pixel+1] +
+ .114*data[pixel+2]);
+ }
+ }
+ else if (format == wxBMP_8BPP_RED) // 1 byte per pixel, red as greys
+ {
+ for (x = 0; x < width; x++)
+ {
+ buffer[x] = (wxUint8)data[3*(y*width + x)];
+ }
+ }
+ else if (format == wxBMP_4BPP) // 4 bpp in color
+ {
+ for (x = 0; x < width; x+=2)
+ {
+ pixel = 3*(y*width + x);
+
+ // fill buffer, ignore if > width
+#if wxUSE_PALETTE
+ buffer[x/2] =
+ ((wxUint8)palette->GetPixel(data[pixel],
+ data[pixel+1],
+ data[pixel+2]) << 4) |
+ (((x+1) > width)
+ ? 0
+ : ((wxUint8)palette->GetPixel(data[pixel+3],
+ data[pixel+4],
+ data[pixel+5]) ));
+#else
+ // FIXME: what should this be? use some std palette maybe?
+ buffer[x/2] = 0;
+#endif // wxUSE_PALETTE
+ }
+ }
+ else if (format == wxBMP_1BPP) // 1 bpp in "color"
+ {
+ for (x = 0; x < width; x+=8)
+ {
+ pixel = 3*(y*width + x);
+
+#if wxUSE_PALETTE
+ buffer[x/8] = ((wxUint8)palette->GetPixel(data[pixel], data[pixel+1], data[pixel+2]) << 7) |
+ (((x+1) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+3], data[pixel+4], data[pixel+5]) << 6)) |
+ (((x+2) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+6], data[pixel+7], data[pixel+8]) << 5)) |
+ (((x+3) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+9], data[pixel+10], data[pixel+11]) << 4)) |
+ (((x+4) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+12], data[pixel+13], data[pixel+14]) << 3)) |
+ (((x+5) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+15], data[pixel+16], data[pixel+17]) << 2)) |
+ (((x+6) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+18], data[pixel+19], data[pixel+20]) << 1)) |
+ (((x+7) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+21], data[pixel+22], data[pixel+23]) ));
+#else
+ // FIXME: what should this be? use some std palette maybe?
+ buffer[x/8] = 0;
+#endif // wxUSE_PALETTE
+ }
+ }
+ else if (format == wxBMP_1BPP_BW) // 1 bpp B&W colormap from red color ONLY
+ {
+ for (x = 0; x < width; x+=8)
+ {
+ pixel = 3*(y*width + x);
+
+ buffer[x/8] =
+ (((wxUint8)(data[pixel] /128.)) << 7) |
+ ( ((x+1) > width) ? 0 : (((wxUint8)(data[pixel+3] /128.)) << 6)) |
+ ( ((x+2) > width) ? 0 : (((wxUint8)(data[pixel+6] /128.)) << 5)) |
+ ( ((x+3) > width) ? 0 : (((wxUint8)(data[pixel+9] /128.)) << 4)) |
+ ( ((x+4) > width) ? 0 : (((wxUint8)(data[pixel+12]/128.)) << 3)) |
+ ( ((x+5) > width) ? 0 : (((wxUint8)(data[pixel+15]/128.)) << 2)) |
+ ( ((x+6) > width) ? 0 : (((wxUint8)(data[pixel+18]/128.)) << 1)) |
+ ( ((x+7) > width) ? 0 : (((wxUint8)(data[pixel+21]/128.)) ));
+ }
}
if (!stream.Write(buffer, row_width))
if (verbose)
wxLogError(_("BMP: Couldn't write data."));
delete[] buffer;
+#if wxUSE_PALETTE
+ delete palette;
+#endif // wxUSE_PALETTE
+ delete q_image;
return FALSE;
}
}
delete[] buffer;
+#if wxUSE_PALETTE
+ delete palette;
+#endif // wxUSE_PALETTE
+ delete q_image;
return TRUE;
}
-#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::DoLoadDib (wxImage * image, int width, int height, int bpp, int ncolors, int comp,
+ off_t bmpOffset, wxInputStream& stream,
+ bool verbose, bool IsBmp, bool hasPalette )
+ {
-bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
-{
+ wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0;
int rshift = 0, gshift = 0, bshift = 0;
- wxUint8 aByte;
- wxUint16 aWord;
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] );
+ wxUint8 aByte;
+ wxUint16 aWord;
- 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)
+ // allocate space for palette if needed
+ struct _cmap
{
- if (verbose)
- wxLogError( _("BMP: 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( _("BMP: Unknown encoding in file.") );
- return FALSE;
+ unsigned char r, g, b;
}
+ *cmap = NULL;
- 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)
{
cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
if (!cmap)
{
if (verbose)
- wxLogError( _("BMP: Couldn't allocate memory.") );
+ 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)
{
if (verbose)
- wxLogError( _("BMP: Couldn't allocate memory.") );
+ wxLogError( _("Loading DIB : Couldn't allocate memory.") );
if (cmap)
free(cmap);
return FALSE;
}
-
/*
* Reading the palette, if it exists.
*/
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];
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;
/*
* 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 (comp == BI_RLE4)
{
if (verbose)
- wxLogError( _("BMP: Cannot deal with 4bit encoded yet.") );
+ wxLogError( _("DIB Header: Cannot deal with 4bit encoded yet.") );
image->Destroy();
free(cmap);
return FALSE;
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::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 wxBMPHandler::DoCanRead( wxInputStream& stream )
{
unsigned char hdr[2];
return (hdr[0] == 'B' && hdr[1] == 'M');
}
+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