// 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"
// wxBMPHandler
//-----------------------------------------------------------------------------
-#if !USE_SHARED_LIBRARIES
IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
-#endif
+
#if wxUSE_STREAMS
+
+bool wxBMPHandler::SaveFile(wxImage *image,
+ wxOutputStream& stream,
+ bool verbose)
+{
+ wxCHECK_MSG( image, FALSE, _T("invalid pointer in wxBMPHandler::SaveFile") );
+
+ if (!image->Ok())
+ {
+ if (verbose) wxLogError(_("BMP: Couldn't save invalid image."));
+ return FALSE;
+ }
+
+ unsigned width = image->GetWidth();
+ unsigned row_width = width * 3 +
+ (((width % 4) == 0) ? 0 : (4 - (width * 3) % 4));
+ // each row must be aligned to dwords
+ struct
+ {
+ // BitmapHeader:
+ wxUint16 magic; // format magic, always 'BM'
+ wxUint32 filesize; // total file size, inc. headers
+ wxUint32 reserved; // for future use
+ wxUint32 data_offset; // image data offset in the file
+
+ // BitmapInfoHeader:
+ wxUint32 bih_size; // 2nd part's size
+ wxUint32 width, height; // bitmap's dimensions
+ wxUint16 planes; // num of planes
+ wxUint16 bpp; // bits per pixel
+ wxUint32 compression; // compression method
+ wxUint32 size_of_bmp; // size of the bitmap
+ wxUint32 h_res, v_res; // image resolution in dpi
+ wxUint32 num_clrs; // number of colors used
+ wxUint32 num_signif_clrs;// number of significant colors
+ } hdr;
+ wxUint32 hdr_size = 14/*BitmapHeader*/ + 40/*BitmapInfoHeader*/;
+
+ hdr.magic = wxUINT16_SWAP_ON_BE(0x4D42/*'BM'*/);
+ hdr.filesize = wxUINT32_SWAP_ON_BE(
+ hdr_size +
+ row_width * image->GetHeight()
+ );
+ hdr.reserved = 0;
+ hdr.data_offset = wxUINT32_SWAP_ON_BE(hdr_size);
+
+ 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(24); // always TrueColor
+ 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
+
+ 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;
+ }
+
+ wxUint8 *data = (wxUint8*) image->GetData();
+ wxUint8 *buffer = new wxUint8[row_width];
+ wxUint8 tmpvar;
+ memset(buffer, 0, row_width);
+ int y; unsigned x;
+
+ for (y = image->GetHeight() -1 ; y >= 0; y--)
+ {
+ memcpy(buffer, data + y * 3 * width, 3 * width);
+ for (x = 0; x < width; x++)
+ {
+ tmpvar = buffer[3 * x + 0];
+ buffer[3 * x + 0] = buffer[3 * x + 2];
+ buffer[3 * x + 2] = tmpvar;
+ }
+
+ if (!stream.Write(buffer, row_width))
+ {
+ if (verbose)
+ wxLogError(_("BMP: Couldn't write data."));
+ delete[] buffer;
+ return FALSE;
+ }
+ }
+ delete[] buffer;
+
+ return TRUE;
+}
+
+
+
+
#ifndef BI_RGB
#define BI_RGB 0
#define BI_RLE8 1
#define poffset (line * width * 3 + column * 3)
-bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream )
+bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
{
int rshift = 0, gshift = 0, bshift = 0;
wxUint8 aByte;
wxUint16 aWord;
- wxInt32 dbuf[4], aDword,
- rmask = 0, gmask = 0, bmask = 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( 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 height = (int)wxINT32_SWAP_ON_BE( dbuf[1] );
if (width > 32767)
{
- wxLogError( _T("Image width > 32767 pixels for file.") );
+ if (verbose)
+ wxLogError( _("BMP: Image width > 32767 pixels for file.") );
return FALSE;
}
if (height > 32767)
{
- wxLogError( _T("Image height > 32767 pixels for file.") );
+ if (verbose)
+ wxLogError( _("BMP: Image height > 32767 pixels for file.") );
return FALSE;
}
-
+
stream.Read( &aWord, 2 );
/*
TODO
int bpp = (int)wxUINT16_SWAP_ON_BE( aWord );
if (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32)
{
- wxLogError( _T("unknown bitdepth in file.") );
+ 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)
{
- wxLogError( _T("unknown encoding in Windows BMP file.") );
+ if (verbose)
+ wxLogError( _("BMP: 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 (((comp == BI_RLE4) && (bpp != 4)) ||
+ ((comp == BI_RLE8) && (bpp != 8)) ||
+ ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32)))
{
- wxLogError( _T("encoding of BMP doesn't match bitdepth.") );
+ if (verbose)
+ wxLogError( _("BMP: Encoding doesn't match bitdepth.") );
return FALSE;
}
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( _("BMP: Couldn't allocate memory.") );
return FALSE;
}
}
unsigned char *ptr = image->GetData();
if (!ptr)
{
- wxLogError( _T("Cannot allocate RAM for RGB data in file.") );
+ if (verbose)
+ wxLogError( _("BMP: Couldn't allocate memory.") );
if (cmap)
free(cmap);
return FALSE;
*/
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;
}
+ // Set the palette for the wxImage
+ image->SetPalette(wxPalette(ncolors, r, g, b));
+
+ delete[] r;
+ delete[] g;
+ delete[] b;
}
else if (bpp == 16 || bpp == 32)
{
}
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 (line = (height - 1); line >= 0; line--)
{
int linepos = 0;
for (column = 0; column < width;)
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( _("BMP: 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;
ptr[poffset + 1] = cmap[aByte].g;
ptr[poffset + 2] = cmap[aByte].b;
column++;
- linepos += size;
+ // linepos += size; seems to be wrong, RR
}
}
}
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];
{
unsigned char temp;
stream.Read( &aWord, 2 );
- aWord = wxUINT16_SWAP_ON_BE( aWord );
+ 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++;
}
{
unsigned char temp;
stream.Read( &aDword, 4 );
- aDword = wxINT32_SWAP_ON_BE( aDword );
+ aDword = wxINT32_SWAP_ON_BE( aDword );
linepos += 4;
temp = (aDword & rmask) >> rshift;
ptr[poffset] = temp;
break;
}
}
- if (cmap)
+ if (cmap)
free(cmap);
image->SetMask( FALSE );
return TRUE;
}
-#endif // wxUSE_STREAMS
+bool wxBMPHandler::DoCanRead( wxInputStream& stream )
+{
+ unsigned char hdr[2];
+ stream.Read(hdr, 2);
+ stream.SeekI(-2, wxFromCurrent);
+ return (hdr[0] == 'B' && hdr[1] == 'M');
+}
+
+#endif // wxUSE_STREAMS
+#endif // wxUSE_IMAGE
projects / wxWidgets.git / blobdiff