/////////////////////////////////////////////////////////////////////////////
-// Name: imagbmp.cpp
-// Purpose: wxImage BMP handler
-// Author: Robert Roebling
+// Name: src/common/imagbmp.cpp
+// Purpose: wxImage BMP,ICO and CUR handlers
+// Author: Robert Roebling, Chris Elliott
// RCS-ID: $Id$
-// Copyright: (c) Robert Roebling
+// Copyright: (c) Robert Roebling, Chris Elliott
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
-#pragma implementation "imagbmp.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
-#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/app.h"
+
+#ifndef WX_PRECOMP
+ #ifdef __WXMSW__
+ #include "wx/msw/wrapwin.h"
+ #endif
+ #include "wx/log.h"
+ #include "wx/app.h"
+ #include "wx/bitmap.h"
+ #include "wx/palette.h"
+ #include "wx/intl.h"
+ #include "wx/math.h"
+#endif
+
#include "wx/filefn.h"
#include "wx/wfstream.h"
-#include "wx/intl.h"
-#include "wx/module.h"
+#include "wx/quantize.h"
+#include "wx/scopeguard.h"
+#include "wx/anidecod.h"
// For memcpy
#include <string.h>
-#ifdef __SALFORDC__
-#ifdef FAR
-#undef FAR
-#endif
-#endif
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------
-#ifdef __WXMSW__
-#include <windows.h>
-#endif
+#if wxUSE_ICO_CUR
+
+static bool CanReadICOOrCUR(wxInputStream *stream, wxUint16 resourceType);
+
+#endif // wxUSE_ICO_CUR
//-----------------------------------------------------------------------------
// wxBMPHandler
IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
-
#if wxUSE_STREAMS
+#ifndef BI_RGB
+ #define BI_RGB 0
+#endif
+
+#ifndef BI_RLE8
+#define BI_RLE8 1
+#endif
+
+#ifndef BI_RLE4
+#define BI_RLE4 2
+#endif
+
+#ifndef BI_BITFIELDS
+#define BI_BITFIELDS 3
+#endif
+
+#define poffset (line * width * 3 + column * 3)
bool wxBMPHandler::SaveFile(wxImage *image,
wxOutputStream& stream,
bool verbose)
{
- wxCHECK_MSG( image, FALSE, _T("invalid pointer in wxBMPHandler::SaveFile") );
+ return SaveDib(image, stream, verbose, true/*IsBmp*/, false/*IsMask*/);
+}
+
+bool wxBMPHandler::SaveDib(wxImage *image,
+ wxOutputStream& stream,
+ bool verbose,
+ bool IsBmp,
+ bool IsMask)
+
+{
+ wxCHECK_MSG( image, false, wxT("invalid pointer in wxBMPHandler::SaveFile") );
+
+ if ( !image->IsOk() )
+ {
+ if ( verbose )
+ {
+ wxLogError(_("BMP: Couldn't save invalid image."));
+ }
+ return false;
+ }
+
+ // get the format of the BMP file to save, else use 24bpp
+ unsigned format = wxBMP_24BPP;
+ if ( image->HasOption(wxIMAGE_OPTION_BMP_FORMAT) )
+ format = image->GetOptionInt(wxIMAGE_OPTION_BMP_FORMAT);
- if (!image->Ok())
+ wxUint16 bpp; // # of bits per pixel
+ int palette_size; // # of color map entries, ie. 2^bpp colors
+
+ // set the bpp and appropriate palette_size, and do additional checks
+ if ( (format == wxBMP_1BPP) || (format == wxBMP_1BPP_BW) )
+ {
+ 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
{
- if (verbose) wxLogError(_("BMP: Couldn't save invalid image."));
- return FALSE;
+ 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 - ((width * bpp + 7) / 8) % 4) % 4; // # bytes to pad to dword
+ unsigned row_width = (width * bpp + 7) / 8 + row_padding; // # of bytes per row
+
struct
{
// BitmapHeader:
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 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 h_res, v_res; // image resolution in pixels-per-meter
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());
- hdr.height = wxUINT32_SWAP_ON_BE(image->GetHeight());
+ if ( IsBmp )
+ {
+ hdr.height = wxUINT32_SWAP_ON_BE(image->GetHeight());
+ }
+ else
+ {
+ hdr.height = wxUINT32_SWAP_ON_BE(2 * image->GetHeight());
+ }
hdr.planes = wxUINT16_SWAP_ON_BE(1); // always 1 plane
- hdr.bpp = wxUINT16_SWAP_ON_BE(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
-
- 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)
- )
+ hdr.size_of_bmp = wxUINT32_SWAP_ON_BE(row_width * image->GetHeight());
+
+ // get the resolution from the image options or fall back to 72dpi standard
+ // for the BMP format if not specified
+ int hres, vres;
+ switch ( GetResolutionFromOptions(*image, &hres, &vres) )
{
- if (verbose)
- wxLogError(_("BMP: Couldn't write the file header."));
- return FALSE;
+ default:
+ wxFAIL_MSG( wxT("unexpected image resolution units") );
+ // fall through
+
+ case wxIMAGE_RESOLUTION_NONE:
+ hres =
+ vres = 72;
+ // fall through to convert it to correct units
+
+ case wxIMAGE_RESOLUTION_INCHES:
+ // convert resolution in inches to resolution in centimeters
+ hres = (int)(10*mm2inches*hres);
+ vres = (int)(10*mm2inches*vres);
+ // fall through to convert it to resolution in meters
+
+ case wxIMAGE_RESOLUTION_CM:
+ // convert resolution in centimeters to resolution in meters
+ hres *= 100;
+ vres *= 100;
+ break;
+ }
+
+ hdr.h_res = wxUINT32_SWAP_ON_BE(hres);
+ hdr.v_res = wxUINT32_SWAP_ON_BE(vres);
+ 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.WriteAll(&hdr.magic, 2) ||
+ !stream.WriteAll(&hdr.filesize, 4) ||
+ !stream.WriteAll(&hdr.reserved, 4) ||
+ !stream.WriteAll(&hdr.data_offset, 4)
+ )
+ {
+ if (verbose)
+ {
+ wxLogError(_("BMP: Couldn't write the file (Bitmap) header."));
+ }
+ return false;
+ }
+ }
+ if ( !IsMask )
+ {
+ if (
+ !stream.WriteAll(&hdr.bih_size, 4) ||
+ !stream.WriteAll(&hdr.width, 4) ||
+ !stream.WriteAll(&hdr.height, 4) ||
+ !stream.WriteAll(&hdr.planes, 2) ||
+ !stream.WriteAll(&hdr.bpp, 2) ||
+ !stream.WriteAll(&hdr.compression, 4) ||
+ !stream.WriteAll(&hdr.size_of_bmp, 4) ||
+ !stream.WriteAll(&hdr.h_res, 4) ||
+ !stream.WriteAll(&hdr.v_res, 4) ||
+ !stream.WriteAll(&hdr.num_clrs, 4) ||
+ !stream.WriteAll(&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
+
+ // 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) )
+ {
+ rgbquad = new wxUint8 [palette_size*4];
+
+ for ( int i = 0; i < palette_size; i++ )
+ {
+ // if 1BPP_BW then the value should be either 0 or 255
+ wxUint8 c = (wxUint8)((i > 0) && (format == wxBMP_1BPP_BW) ? 255 : i);
+
+ rgbquad[i*4] =
+ rgbquad[i*4+1] =
+ rgbquad[i*4+2] = c;
+ rgbquad[i*4+3] = 0;
+ }
+ }
+
+ // if the colormap was made, then it needs to be written
+ if (rgbquad)
+ {
+ if ( !IsMask )
+ {
+ if ( !stream.WriteAll(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->IsOk()) 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--)
+ 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))
+ {
+ for (x = 0; x < width; x++)
+ {
+ pixel = 3*(y*width + x);
+#if wxUSE_PALETTE
+ buffer[x] = (wxUint8)palette->GetPixel( data[pixel],
+ data[pixel+1],
+ data[pixel+2] );
+#else
+ // FIXME: what should this be? use some std palette maybe?
+ buffer[x] = 0;
+#endif // wxUSE_PALETTE
+ }
+ }
+ else if ( format == wxBMP_8BPP_GREY ) // 1 byte per pix, rgb ave to grey
+ {
+ 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)(
+ ((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)(
+ ((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
{
- tmpvar = buffer[3 * x + 0];
- buffer[3 * x + 0] = buffer[3 * x + 2];
- buffer[3 * x + 2] = tmpvar;
+ for (x = 0; x < width; x+=8)
+ {
+ pixel = 3*(y*width + x);
+
+ buffer[x/8] = (wxUint8)(
+ (((wxUint8)(data[pixel] /128.)) << 7) |
+ (((x+1) > width) ? 0 : (((wxUint8)(data[pixel+3] /128.)) << 6)) |
+ (((x+2) > width) ? 0 : (((wxUint8)(data[pixel+6] /128.)) << 5)) |
+ (((x+3) > width) ? 0 : (((wxUint8)(data[pixel+9] /128.)) << 4)) |
+ (((x+4) > width) ? 0 : (((wxUint8)(data[pixel+12]/128.)) << 3)) |
+ (((x+5) > width) ? 0 : (((wxUint8)(data[pixel+15]/128.)) << 2)) |
+ (((x+6) > width) ? 0 : (((wxUint8)(data[pixel+18]/128.)) << 1)) |
+ (((x+7) > width) ? 0 : (((wxUint8)(data[pixel+21]/128.)) )) );
+ }
}
-
- if (!stream.Write(buffer, row_width))
+
+ if ( !stream.WriteAll(buffer, row_width) )
{
if (verbose)
+ {
wxLogError(_("BMP: Couldn't write data."));
+ }
delete[] buffer;
- return FALSE;
+#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;
+ return true;
}
+struct BMPPalette
+{
+ static void Free(BMPPalette* pal) { delete [] pal; }
+ unsigned char r, g, b;
+};
-#ifndef BI_RGB
-#define BI_RGB 0
-#define BI_RLE8 1
-#define BI_RLE4 2
-#endif
-
-#ifndef BI_BITFIELDS
-#define BI_BITFIELDS 3
-#endif
-
-#define poffset (line * width * 3 + column * 3)
-
-bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose, int WXUNUSED(index) )
+bool wxBMPHandler::DoLoadDib(wxImage * image, int width, int height,
+ int bpp, int ncolors, int comp,
+ wxFileOffset bmpOffset, wxInputStream& stream,
+ bool verbose, bool IsBmp, bool hasPalette)
{
- int rshift = 0, gshift = 0, bshift = 0;
+ wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0, amask = 0;
+ int rshift = 0, gshift = 0, bshift = 0, ashift = 0;
+ int rbits = 0, gbits = 0, bbits = 0;
+ wxInt32 dbuf[4];
+ wxInt8 bbuf[4];
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;
-
- 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] );
+ // allocate space for palette if needed:
+ BMPPalette *cmap;
- 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 ( bpp < 16 )
{
- if (verbose)
- wxLogError( _("BMP: Image width > 32767 pixels for file.") );
- return FALSE;
+ cmap = new BMPPalette[ncolors];
+ if ( !cmap )
+ {
+ if (verbose)
+ {
+ wxLogError(_("BMP: Couldn't allocate memory."));
+ }
+ return false;
+ }
}
- if (height > 32767)
+ else // no palette
{
- if (verbose)
- wxLogError( _("BMP: Image height > 32767 pixels for file.") );
- return FALSE;
+ cmap = NULL;
}
- stream.Read( &aWord, 2 );
-/*
- TODO
- int planes = (int)wxUINT16_SWAP_ON_BE( aWord );
-*/
- stream.Read( &aWord, 2 );
- int bpp = (int)wxUINT16_SWAP_ON_BE( aWord );
- if (bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32)
- {
- if (verbose)
- wxLogError( _("BMP: Unknown bitdepth in file.") );
- return FALSE;
- }
+ wxON_BLOCK_EXIT1(&BMPPalette::Free, cmap);
+
+ bool isUpsideDown = true;
- 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 (height < 0)
{
- if (verbose)
- wxLogError( _("BMP: Unknown encoding in file.") );
- return FALSE;
+ isUpsideDown = false;
+ height = -height;
}
- 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)))
+ // destroy existing here instead of:
+ image->Destroy();
+ image->Create(width, height);
+
+ unsigned char *ptr = image->GetData();
+
+ if ( !ptr )
{
- if (verbose)
- wxLogError( _("BMP: Encoding doesn't match bitdepth.") );
- return FALSE;
+ if ( verbose )
+ {
+ wxLogError( _("BMP: Couldn't allocate memory.") );
+ }
+ return false;
}
- if (bpp < 16)
+
+ unsigned char *alpha;
+ if ( bpp == 32 )
{
- cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
- if (!cmap)
+ // tell the image to allocate an alpha buffer
+ image->SetAlpha();
+ alpha = image->GetAlpha();
+ if ( !alpha )
{
- if (verbose)
- wxLogError( _("BMP: Couldn't allocate memory.") );
- return FALSE;
+ if ( verbose )
+ {
+ wxLogError(_("BMP: Couldn't allocate memory."));
+ }
+ return false;
}
}
- else
- cmap = NULL;
-
- image->Create( width, height );
- unsigned char *ptr = image->GetData();
- if (!ptr)
+ else // no alpha
{
- if (verbose)
- wxLogError( _("BMP: Couldn't allocate memory.") );
- if (cmap)
- free(cmap);
- return FALSE;
+ alpha = NULL;
}
- /*
- * 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)
+ {
+ if ( !stream.ReadAll(bbuf, 4) )
+ return false;
- r[j] = cmap[j].r;
- g[j] = cmap[j].g;
- b[j] = cmap[j].b;
+ cmap[j].b = bbuf[0];
+ cmap[j].g = bbuf[1];
+ cmap[j].r = bbuf[2];
+
+ r[j] = cmap[j].r;
+ g[j] = cmap[j].g;
+ b[j] = cmap[j].b;
+ }
+ else
+ {
+ //used in reading .ico file mask
+ r[j] = cmap[j].r =
+ g[j] = cmap[j].g =
+ b[j] = cmap[j].b = ( j ? 255 : 0 );
+ }
}
+
+#if wxUSE_PALETTE
// 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 */
- for (bit = 0; bit < bpp; bit++)
+ int bit;
+ if ( !stream.ReadAll(dbuf, 4 * 3) )
+ return false;
+
+ rmask = wxINT32_SWAP_ON_BE(dbuf[0]);
+ gmask = wxINT32_SWAP_ON_BE(dbuf[1]);
+ bmask = wxINT32_SWAP_ON_BE(dbuf[2]);
+ // find shift amount (Least significant bit of mask)
+ for (bit = bpp-1; bit>=0; bit--)
{
if (bmask & (1 << bit))
bshift = bit;
if (rmask & (1 << bit))
rshift = bit;
}
+ // Find number of bits in mask (MSB-LSB+1)
+ for (bit = 0; bit < bpp; bit++)
+ {
+ if (bmask & (1 << bit))
+ bbits = bit-bshift+1;
+ if (gmask & (1 << bit))
+ gbits = bit-gshift+1;
+ if (rmask & (1 << bit))
+ rbits = bit-rshift+1;
+ }
}
- else if (bpp == 16)
+ else if ( bpp == 16 )
{
rmask = 0x7C00;
gmask = 0x03E0;
rshift = 10;
gshift = 5;
bshift = 0;
+ rbits = 5;
+ gbits = 5;
+ bbits = 5;
}
- else if (bpp == 32)
+ else if ( bpp == 32 )
{
rmask = 0x00FF0000;
gmask = 0x0000FF00;
bmask = 0x000000FF;
+ amask = 0xFF000000;
+
+ ashift = 24;
rshift = 16;
gshift = 8;
bshift = 0;
+ rbits = 8;
+ gbits = 8;
+ bbits = 8;
}
}
/*
* Reading the image data
*/
- stream.SeekI( start_offset + offset );
+ if ( IsBmp )
+ {
+ // NOTE: seeking a positive amount in wxFromCurrent mode allows us to
+ // load even non-seekable streams (see wxInputStream::SeekI docs)!
+ const wxFileOffset pos = stream.TellI();
+ if ( pos == wxInvalidOffset ||
+ (bmpOffset > pos &&
+ stream.SeekI(bmpOffset - pos, wxFromCurrent) == wxInvalidOffset) )
+ return false;
+ //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++)
{
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--)
+ // flag indicating if we have any not fully transparent alpha values: this
+ // is used to account for the bitmaps which use 32bpp format (normally
+ // meaning that they have alpha channel) but have only zeroes in it so that
+ // without this hack they appear fully transparent -- and as this is
+ // unlikely intentional, we consider that they don't have alpha at all in
+ // this case (see #10915)
+ bool hasValidAlpha = false;
+
+ for ( int row = 0; row < height; row++ )
{
+ int line = isUpsideDown ? height - 1 - row : row;
+
int linepos = 0;
- for (column = 0; column < width;)
+ for ( int column = 0; column < width ; )
{
- if (bpp < 16)
+ if ( bpp < 16 )
{
- int index = 0;
linepos++;
aByte = stream.GetC();
- if (bpp == 1)
+ if ( !stream.IsOk() )
+ return false;
+
+ if ( bpp == 1 )
{
- int bit = 0;
- for (bit = 0; bit < 8 && column < width; bit++)
+ for (int bit = 0; bit < 8 && column < width; bit++)
{
- index = ((aByte & (0x80 >> bit)) ? 1 : 0);
+ int index = ((aByte & (0x80 >> bit)) ? 1 : 0);
ptr[poffset] = cmap[index].r;
ptr[poffset + 1] = cmap[index].g;
ptr[poffset + 2] = cmap[index].b;
column++;
}
}
- else if (bpp == 4)
+ else if ( bpp == 4 )
{
- if (comp == BI_RLE4)
+ if ( comp == BI_RLE4 )
{
- if (verbose)
- wxLogError( _("BMP: Cannot deal with 4bit encoded yet.") );
- image->Destroy();
- free(cmap);
- return FALSE;
- }
- else
- {
- int nibble = 0;
- for (nibble = 0; nibble < 2 && column < width; nibble++)
- {
- index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4));
- if (index >= 16)
- index = 15;
- ptr[poffset] = cmap[index].r;
- ptr[poffset + 1] = cmap[index].g;
- ptr[poffset + 2] = cmap[index].b;
- column++;
- }
- }
- }
- else if (bpp == 8)
- {
- if (comp == BI_RLE8)
- {
- unsigned char first;
+ wxUint8 first;
first = aByte;
aByte = stream.GetC();
- if (first == 0)
+ if ( !stream.IsOk() )
+ return false;
+
+ if ( first == 0 )
{
- if (aByte == 0)
+ if ( aByte == 0 )
{
- /* column = width; */
+ // end of scanline marker
+ column = width;
+ row--;
}
- else if (aByte == 1)
+ else if ( aByte == 1 )
{
+ // end of RLE data marker, stop decoding
column = width;
- line = -1;
+ row = height;
}
- else if (aByte == 2)
+ else if ( aByte == 2 )
{
+ // delta marker, move in image
aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
column += aByte;
- linepos = column * bpp / 8;
+ linepos = column * bpp / 4;
aByte = stream.GetC();
- line += aByte;
+ if ( !stream.IsOk() )
+ return false;
+ row += aByte; // upside down
}
else
{
int absolute = aByte;
+ wxUint8 nibble[2] ;
+ int readBytes = 0 ;
for (int k = 0; k < absolute; k++)
{
- linepos++;
- aByte = stream.GetC();
- ptr[poffset ] = cmap[aByte].r;
- ptr[poffset + 1] = cmap[aByte].g;
- ptr[poffset + 2] = cmap[aByte].b;
+ if ( !(k % 2 ) )
+ {
+ ++readBytes ;
+ aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
+ nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
+ nibble[1] = (wxUint8)( aByte & 0x0F ) ;
+ }
+ ptr[poffset ] = cmap[nibble[k%2]].r;
+ ptr[poffset + 1] = cmap[nibble[k%2]].g;
+ ptr[poffset + 2] = cmap[nibble[k%2]].b;
column++;
+ if ( k % 2 )
+ linepos++;
}
- if (absolute & 0x01)
+ if ( readBytes & 0x01 )
+ {
aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
+ }
}
}
else
{
- for (int l = 0; l < first && column < width; l++)
+ wxUint8 nibble[2] ;
+ nibble[0] = (wxUint8)( (aByte & 0xF0) >> 4 ) ;
+ nibble[1] = (wxUint8)( aByte & 0x0F ) ;
+
+ for ( int l = 0; l < first && column < width; l++ )
{
- ptr[poffset ] = cmap[aByte].r;
- ptr[poffset + 1] = cmap[aByte].g;
- ptr[poffset + 2] = cmap[aByte].b;
+ ptr[poffset ] = cmap[nibble[l%2]].r;
+ ptr[poffset + 1] = cmap[nibble[l%2]].g;
+ ptr[poffset + 2] = cmap[nibble[l%2]].b;
column++;
- linepos++;
+ if ( l % 2 )
+ linepos++;
}
}
}
else
{
- ptr[poffset ] = cmap[aByte].r;
+ for (int nibble = 0; nibble < 2 && column < width; nibble++)
+ {
+ int index = ((aByte & (0xF0 >> (nibble * 4))) >> (!nibble * 4));
+ if ( index >= 16 )
+ index = 15;
+ ptr[poffset] = cmap[index].r;
+ ptr[poffset + 1] = cmap[index].g;
+ ptr[poffset + 2] = cmap[index].b;
+ column++;
+ }
+ }
+ }
+ else if ( bpp == 8 )
+ {
+ if ( comp == BI_RLE8 )
+ {
+ unsigned char first;
+ first = aByte;
+ aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
+
+ if ( first == 0 )
+ {
+ if ( aByte == 0 )
+ {
+ // end of scanline marker
+ column = width;
+ row--;
+ }
+ else if ( aByte == 1 )
+ {
+ // end of RLE data marker, stop decoding
+ column = width;
+ row = height;
+ }
+ else if ( aByte == 2 )
+ {
+ // delta marker, move in image
+ aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
+ column += aByte;
+ linepos = column * bpp / 8;
+ aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
+ row -= aByte;
+ }
+ else
+ {
+ int absolute = aByte;
+ for (int k = 0; k < absolute; k++)
+ {
+ linepos++;
+ aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
+ ptr[poffset ] = cmap[aByte].r;
+ ptr[poffset + 1] = cmap[aByte].g;
+ ptr[poffset + 2] = cmap[aByte].b;
+ column++;
+ }
+ if ( absolute & 0x01 )
+ {
+ aByte = stream.GetC();
+ if ( !stream.IsOk() )
+ return false;
+ }
+ }
+ }
+ else
+ {
+ for ( int l = 0; l < first && column < width; l++ )
+ {
+ ptr[poffset ] = cmap[aByte].r;
+ ptr[poffset + 1] = cmap[aByte].g;
+ ptr[poffset + 2] = cmap[aByte].b;
+ column++;
+ linepos++;
+ }
+ }
+ }
+ else
+ {
+ ptr[poffset ] = cmap[aByte].r;
ptr[poffset + 1] = cmap[aByte].g;
ptr[poffset + 2] = cmap[aByte].b;
column++;
// linepos += size; seems to be wrong, RR
}
}
- }
- else if (bpp == 24)
- {
- stream.Read( &bbuf, 3 );
- linepos += 3;
- ptr[poffset ] = (unsigned char)bbuf[2];
- ptr[poffset + 1] = (unsigned char)bbuf[1];
- ptr[poffset + 2] = (unsigned char)bbuf[0];
- column++;
- }
- else if (bpp == 16)
- {
- unsigned char temp;
- stream.Read( &aWord, 2 );
- aWord = wxUINT16_SWAP_ON_BE( aWord );
- linepos += 2;
- temp = (aWord & rmask) >> rshift;
- ptr[poffset] = temp;
- temp = (aWord & gmask) >> gshift;
- ptr[poffset + 1] = temp;
- temp = (aWord & bmask) >> bshift;
- ptr[poffset + 2] = temp;
- column++;
- }
- else
- {
- unsigned char temp;
- stream.Read( &aDword, 4 );
- aDword = wxINT32_SWAP_ON_BE( aDword );
- linepos += 4;
- temp = (aDword & rmask) >> rshift;
- ptr[poffset] = temp;
- temp = (aDword & gmask) >> gshift;
- ptr[poffset + 1] = temp;
- temp = (aDword & bmask) >> bshift;
- ptr[poffset + 2] = temp;
- column++;
- }
- }
- while ((linepos < linesize) && (comp != 1) && (comp != 2))
- {
- stream.Read( &aByte, 1 );
- linepos += 1;
- if (stream.LastError() != wxStream_NOERROR)
- break;
- }
- }
- if (cmap)
- free(cmap);
-
- image->SetMask( FALSE );
-
- return TRUE;
+ }
+ else if ( bpp == 24 )
+ {
+ if ( !stream.ReadAll(bbuf, 3) )
+ return false;
+ linepos += 3;
+ ptr[poffset ] = (unsigned char)bbuf[2];
+ ptr[poffset + 1] = (unsigned char)bbuf[1];
+ ptr[poffset + 2] = (unsigned char)bbuf[0];
+ column++;
+ }
+ else if ( bpp == 16 )
+ {
+ unsigned char temp;
+ if ( !stream.ReadAll(&aWord, 2) )
+ return false;
+ aWord = wxUINT16_SWAP_ON_BE(aWord);
+ linepos += 2;
+ /* Use the masks and calculated amount of shift
+ to retrieve the color data out of the word. Then
+ shift it left by (8 - number of bits) such that
+ the image has the proper dynamic range */
+ temp = (unsigned char)(((aWord & rmask) >> rshift) << (8-rbits));
+ ptr[poffset] = temp;
+ temp = (unsigned char)(((aWord & gmask) >> gshift) << (8-gbits));
+ ptr[poffset + 1] = temp;
+ temp = (unsigned char)(((aWord & bmask) >> bshift) << (8-bbits));
+ ptr[poffset + 2] = temp;
+ column++;
+ }
+ else
+ {
+ unsigned char temp;
+ if ( !stream.ReadAll(&aDword, 4) )
+ return false;
+
+ aDword = wxINT32_SWAP_ON_BE(aDword);
+ linepos += 4;
+ temp = (unsigned char)((aDword & rmask) >> rshift);
+ ptr[poffset] = temp;
+ temp = (unsigned char)((aDword & gmask) >> gshift);
+ ptr[poffset + 1] = temp;
+ temp = (unsigned char)((aDword & bmask) >> bshift);
+ ptr[poffset + 2] = temp;
+ if ( alpha )
+ {
+ temp = (unsigned char)((aDword & amask) >> ashift);
+ alpha[line * width + column] = temp;
+
+ if ( temp != wxALPHA_TRANSPARENT )
+ hasValidAlpha = true;
+ }
+ column++;
+ }
+ }
+ while ( (linepos < linesize) && (comp != 1) && (comp != 2) )
+ {
+ ++linepos;
+ if ( !stream.ReadAll(&aByte, 1) )
+ break;
+ }
+ }
+
+ image->SetMask(false);
+
+ // check if we had any valid alpha values in this bitmap
+ if ( alpha && !hasValidAlpha )
+ {
+ // we didn't, so finally discard the alpha channel completely
+ image->ClearAlpha();
+ }
+
+ const wxStreamError err = stream.GetLastError();
+ return err == wxSTREAM_NO_ERROR || err == wxSTREAM_EOF;
+}
+
+bool wxBMPHandler::LoadDib(wxImage *image, wxInputStream& stream,
+ bool verbose, bool IsBmp)
+{
+ wxUint16 aWord;
+ wxInt32 dbuf[4];
+ wxInt8 bbuf[4];
+
+ if ( IsBmp )
+ {
+ // read the header off the .BMP format file
+ if ( !stream.ReadAll(bbuf, 2) ||
+ !stream.ReadAll(dbuf, 16) )
+ return false;
+ }
+ else
+ {
+ if ( !stream.ReadAll(dbuf, 4) )
+ return false;
+ }
+ #if 0 // unused
+ wxInt32 size = wxINT32_SWAP_ON_BE(dbuf[0]);
+ #endif
+ wxFileOffset offset = wxINT32_SWAP_ON_BE(dbuf[2]);
+
+ if ( !stream.ReadAll(dbuf, 4 * 2) )
+ return false;
+
+ int width = wxINT32_SWAP_ON_BE((int)dbuf[0]);
+ int height = wxINT32_SWAP_ON_BE((int)dbuf[1]);
+ if ( !IsBmp)height = height / 2; // for icons divide by 2
+
+ if ( width > 32767 )
+ {
+ if (verbose)
+ {
+ wxLogError( _("DIB Header: Image width > 32767 pixels for file.") );
+ }
+ return false;
+ }
+ if ( height > 32767 )
+ {
+ if (verbose)
+ {
+ wxLogError( _("DIB Header: Image height > 32767 pixels for file.") );
+ }
+ return false;
+ }
+
+ if ( !stream.ReadAll(&aWord, 2) )
+ return false;
+
+ /*
+ TODO
+ int planes = (int)wxUINT16_SWAP_ON_BE( aWord );
+ */
+ if ( !stream.ReadAll(&aWord, 2) )
+ return false;
+
+ int bpp = wxUINT16_SWAP_ON_BE((int)aWord);
+ if ( bpp != 1 && bpp != 4 && bpp != 8 && bpp != 16 && bpp != 24 && bpp != 32 )
+ {
+ if (verbose)
+ {
+ wxLogError( _("DIB Header: Unknown bitdepth in file.") );
+ }
+ return false;
+ }
+
+ if ( !stream.ReadAll(dbuf, 4 * 4) )
+ return false;
+
+ int comp = wxINT32_SWAP_ON_BE((int)dbuf[0]);
+ if ( comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 &&
+ comp != BI_BITFIELDS )
+ {
+ if (verbose)
+ {
+ wxLogError( _("DIB Header: Unknown encoding in file.") );
+ }
+ return false;
+ }
+
+ if ( !stream.ReadAll(dbuf, 4 * 2) )
+ return false;
+
+ int ncolors = wxINT32_SWAP_ON_BE( (int)dbuf[0] );
+ if (ncolors == 0)
+ ncolors = 1 << bpp;
+ /* some more sanity checks */
+ if (((comp == BI_RLE4) && (bpp != 4)) ||
+ ((comp == BI_RLE8) && (bpp != 8)) ||
+ ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32)))
+ {
+ if (verbose)
+ {
+ wxLogError( _("DIB Header: Encoding doesn't match bitdepth.") );
+ }
+ return false;
+ }
+
+ //read DIB; this is the BMP image or the XOR part of an icon image
+ if ( !DoLoadDib(image, width, height, bpp, ncolors, comp, offset, stream,
+ verbose, IsBmp, true) )
+ {
+ if (verbose)
+ {
+ wxLogError( _("Error in reading image DIB.") );
+ }
+ return false;
+ }
+
+ if ( !IsBmp )
+ {
+ //read Icon mask which is monochrome
+ //there is no palette, so we will create one
+ wxImage mask;
+ if ( !DoLoadDib(&mask, width, height, 1, 2, BI_RGB, offset, stream,
+ verbose, IsBmp, false) )
+ {
+ if (verbose)
+ {
+ wxLogError( _("ICO: Error in reading mask DIB.") );
+ }
+ return false;
+ }
+ image->SetMaskFromImage(mask, 255, 255, 255);
+
+ }
+
+ // the resolution in the bitmap header is in meters, convert to centimeters
+ image->SetOption(wxIMAGE_OPTION_RESOLUTIONUNIT, wxIMAGE_RESOLUTION_CM);
+ image->SetOption(wxIMAGE_OPTION_RESOLUTIONX, dbuf[2]/100);
+ image->SetOption(wxIMAGE_OPTION_RESOLUTIONY, dbuf[3]/100);
+
+ return true;
}
-bool wxBMPHandler::DoCanRead( wxInputStream& stream )
+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 ( !stream.ReadAll(hdr, WXSIZEOF(hdr)) ) // it's ok to modify the stream position here
+ return false;
+
+ // do we have the BMP file signature?
+ return hdr[0] == 'B' && hdr[1] == 'M';
}
#endif // wxUSE_STREAMS
+
+#if wxUSE_ICO_CUR
+//-----------------------------------------------------------------------------
+// wxICOHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxICOHandler, wxBMPHandler)
+
+#if wxUSE_STREAMS
+
+struct ICONDIRENTRY
+{
+ wxUint8 bWidth; // Width of the image
+ wxUint8 bHeight; // Height of the image (times 2)
+ wxUint8 bColorCount; // Number of colors in image (0 if >=8bpp)
+ wxUint8 bReserved; // Reserved
+
+ // these two are different in icons and cursors:
+ // icon or cursor
+ wxUint16 wPlanes; // Color Planes or XHotSpot
+ wxUint16 wBitCount; // Bits per pixel or YHotSpot
+
+ wxUint32 dwBytesInRes; // how many bytes in this resource?
+ wxUint32 dwImageOffset; // where in the file is this image
+};
+
+struct ICONDIR
+{
+ wxUint16 idReserved; // Reserved
+ wxUint16 idType; // resource type (1 for icons, 2 for cursors)
+ wxUint16 idCount; // how many images?
+};
+
+
+bool wxICOHandler::SaveFile(wxImage *image,
+ wxOutputStream& stream,
+ bool verbose)
+
+{
+ //sanity check; icon must be less than 127 pixels high and 255 wide
+ if ( image->GetHeight () > 127 )
+ {
+ if ( verbose )
+ {
+ wxLogError(_("ICO: Image too tall for an icon."));
+ }
+ return false;
+ }
+ if ( image->GetWidth () > 255 )
+ {
+ if ( verbose )
+ {
+ wxLogError(_("ICO: Image too wide for an icon."));
+ }
+ return false;
+ }
+
+ const int images = 1; // only generate one image
+
+ // VS: This is a hack of sort - since ICO and CUR files are almost
+ // identical, we have all the meat in wxICOHandler and check for
+ // the actual (handler) type when the code has to distinguish between
+ // the two formats
+ int type = (this->GetType() == wxBITMAP_TYPE_CUR) ? 2 : 1;
+
+ // write a header, (ICONDIR)
+ // Calculate the header size
+ wxUint32 offset = 3 * sizeof(wxUint16);
+
+ ICONDIR IconDir;
+ IconDir.idReserved = 0;
+ IconDir.idType = wxUINT16_SWAP_ON_BE((wxUint16)type);
+ IconDir.idCount = wxUINT16_SWAP_ON_BE((wxUint16)images);
+ if ( !stream.WriteAll(&IconDir.idReserved, sizeof(IconDir.idReserved)) ||
+ !stream.WriteAll(&IconDir.idType, sizeof(IconDir.idType)) ||
+ !stream.WriteAll(&IconDir.idCount, sizeof(IconDir.idCount)) )
+ {
+ if ( verbose )
+ {
+ wxLogError(_("ICO: Error writing the image file!"));
+ }
+ return false;
+ }
+
+ // for each iamage write a description ICONDIRENTRY:
+ ICONDIRENTRY icondirentry;
+ for (int img = 0; img < images; img++)
+ {
+ wxImage mask;
+
+ if ( image->HasMask() )
+ {
+ // make another image with black/white:
+ mask = image->ConvertToMono (image->GetMaskRed(), image->GetMaskGreen(), image->GetMaskBlue() );
+
+ // now we need to change the masked regions to black:
+ unsigned char r = image->GetMaskRed();
+ unsigned char g = image->GetMaskGreen();
+ unsigned char b = image->GetMaskBlue();
+ if ( (r != 0) || (g != 0) || (b != 0) )
+ {
+ // Go round and apply black to the masked bits:
+ int i, j;
+ for (i = 0; i < mask.GetWidth(); i++)
+ {
+ for (j = 0; j < mask.GetHeight(); j++)
+ {
+ if ((r == mask.GetRed(i, j)) &&
+ (g == mask.GetGreen(i, j))&&
+ (b == mask.GetBlue(i, j)) )
+ image->SetRGB(i, j, 0, 0, 0 );
+ }
+ }
+ }
+ }
+ else
+ {
+ // just make a black mask all over:
+ mask = image->Copy();
+ int i, j;
+ for (i = 0; i < mask.GetWidth(); i++)
+ for (j = 0; j < mask.GetHeight(); j++)
+ mask.SetRGB(i, j, 0, 0, 0 );
+ }
+ // Set the formats for image and mask
+ // (Windows never saves with more than 8 colors):
+ image->SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_8BPP);
+
+ // monochome bitmap:
+ mask.SetOption(wxIMAGE_OPTION_BMP_FORMAT, wxBMP_1BPP_BW);
+ bool IsBmp = false;
+ bool IsMask = false;
+
+ //calculate size and offset of image and mask
+ wxCountingOutputStream cStream;
+ bool bResult = SaveDib(image, cStream, verbose, IsBmp, IsMask);
+ if ( !bResult )
+ {
+ if ( verbose )
+ {
+ wxLogError(_("ICO: Error writing the image file!"));
+ }
+ return false;
+ }
+ IsMask = true;
+
+ bResult = SaveDib(&mask, cStream, verbose, IsBmp, IsMask);
+ if ( !bResult )
+ {
+ if ( verbose )
+ {
+ wxLogError(_("ICO: Error writing the image file!"));
+ }
+ return false;
+ }
+ wxUint32 Size = cStream.GetSize();
+
+ // wxCountingOutputStream::IsOk() always returns true for now and this
+ // "if" provokes VC++ warnings in optimized build
+#if 0
+ if ( !cStream.IsOk() )
+ {
+ if ( verbose )
+ {
+ wxLogError(_("ICO: Error writing the image file!"));
+ }
+ return false;
+ }
+#endif // 0
+
+ offset = offset + sizeof(ICONDIRENTRY);
+
+ icondirentry.bWidth = (wxUint8)image->GetWidth();
+ icondirentry.bHeight = (wxUint8)(2 * image->GetHeight());
+ icondirentry.bColorCount = 0;
+ icondirentry.bReserved = 0;
+ icondirentry.wPlanes = wxUINT16_SWAP_ON_BE(1);
+ icondirentry.wBitCount = wxUINT16_SWAP_ON_BE(wxBMP_8BPP);
+ if ( type == 2 /*CUR*/)
+ {
+ int hx = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) ?
+ image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) :
+ image->GetWidth() / 2;
+ int hy = image->HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ?
+ image->GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) :
+ image->GetHeight() / 2;
+
+ // actually write the values of the hot spot here:
+ icondirentry.wPlanes = wxUINT16_SWAP_ON_BE((wxUint16)hx);
+ icondirentry.wBitCount = wxUINT16_SWAP_ON_BE((wxUint16)hy);
+ }
+ icondirentry.dwBytesInRes = wxUINT32_SWAP_ON_BE(Size);
+ icondirentry.dwImageOffset = wxUINT32_SWAP_ON_BE(offset);
+
+ // increase size to allow for the data written:
+ offset += Size;
+
+ // write to stream:
+ if ( !stream.WriteAll(&icondirentry.bWidth, sizeof(icondirentry.bWidth)) ||
+ !stream.WriteAll(&icondirentry.bHeight, sizeof(icondirentry.bHeight)) ||
+ !stream.WriteAll(&icondirentry.bColorCount, sizeof(icondirentry.bColorCount)) ||
+ !stream.WriteAll(&icondirentry.bReserved, sizeof(icondirentry.bReserved)) ||
+ !stream.WriteAll(&icondirentry.wPlanes, sizeof(icondirentry.wPlanes)) ||
+ !stream.WriteAll(&icondirentry.wBitCount, sizeof(icondirentry.wBitCount)) ||
+ !stream.WriteAll(&icondirentry.dwBytesInRes, sizeof(icondirentry.dwBytesInRes)) ||
+ !stream.WriteAll(&icondirentry.dwImageOffset, sizeof(icondirentry.dwImageOffset)) )
+ {
+ 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)
+{
+ if ( stream.IsSeekable() && stream.SeekI(0) == wxInvalidOffset )
+ {
+ return false;
+ }
+
+ return DoLoadFile(image, stream, verbose, index);
+}
+
+bool wxICOHandler::DoLoadFile(wxImage *image, wxInputStream& stream,
+ bool WXUNUSED(verbose), int index)
+{
+ bool bResult wxDUMMY_INITIALIZE(false);
+ bool IsBmp = false;
+
+ ICONDIR IconDir;
+
+ if ( !stream.ReadAll(&IconDir, sizeof(IconDir)) )
+ return false;
+
+ 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;
+
+ // remember how many bytes we read from the stream:
+ wxFileOffset alreadySeeked = sizeof(IconDir);
+
+ for (unsigned int i = 0; i < nIcons; i++ )
+ {
+ if ( !stream.ReadAll(pCurrentEntry, sizeof(ICONDIRENTRY)) )
+ return false;
+
+ alreadySeeked += stream.LastRead();
+
+ // 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;
+
+ // NOTE: seeking a positive amount in wxFromCurrent mode allows us to
+ // load even non-seekable streams (see wxInputStream::SeekI docs)!
+ wxFileOffset offset = wxUINT32_SWAP_ON_BE(pCurrentEntry->dwImageOffset) - alreadySeeked;
+ if (offset != 0 && stream.SeekI(offset, wxFromCurrent) == wxInvalidOffset)
+ return false;
+
+ bResult = LoadDib(image, stream, true, IsBmp);
+ bool bIsCursorType = (this->GetType() == wxBITMAP_TYPE_CUR) || (this->GetType() == wxBITMAP_TYPE_ANI);
+ if ( bResult && bIsCursorType && nType == 2 )
+ {
+ // it is a cursor, so let's set the hotspot:
+ image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, wxUINT16_SWAP_ON_BE(pCurrentEntry->wPlanes));
+ image->SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, wxUINT16_SWAP_ON_BE(pCurrentEntry->wBitCount));
+ }
+ }
+
+ delete [] pIconDirEntry;
+
+ return bResult;
+}
+
+int wxICOHandler::DoGetImageCount(wxInputStream& stream)
+{
+ // It's ok to modify the stream position in this function.
+
+ if ( stream.IsSeekable() && stream.SeekI(0) == wxInvalidOffset )
+ {
+ return 0;
+ }
+
+ ICONDIR IconDir;
+
+ if ( !stream.ReadAll(&IconDir, sizeof(IconDir)) )
+ return 0;
+
+ return (int)wxUINT16_SWAP_ON_BE(IconDir.idCount);
+}
+
+bool wxICOHandler::DoCanRead(wxInputStream& stream)
+{
+ return CanReadICOOrCUR(&stream, 1 /*for identifying an icon*/);
+
+}
+
+#endif // wxUSE_STREAMS
+
+
+//-----------------------------------------------------------------------------
+// wxCURHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxCURHandler, wxICOHandler)
+
+#if wxUSE_STREAMS
+
+bool wxCURHandler::DoCanRead(wxInputStream& stream)
+{
+ return CanReadICOOrCUR(&stream, 2 /*for identifying a cursor*/);
+}
+
+#endif // wxUSE_STREAMS
+
+//-----------------------------------------------------------------------------
+// wxANIHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_DYNAMIC_CLASS(wxANIHandler, wxCURHandler)
+
+#if wxUSE_STREAMS
+
+bool wxANIHandler::LoadFile(wxImage *image, wxInputStream& stream,
+ bool WXUNUSED(verbose), int index)
+{
+ wxANIDecoder decoder;
+ if (!decoder.Load(stream))
+ return false;
+
+ return decoder.ConvertToImage(index != -1 ? (size_t)index : 0, image);
+}
+
+bool wxANIHandler::DoCanRead(wxInputStream& stream)
+{
+ wxANIDecoder decod;
+ return decod.CanRead(stream);
+ // it's ok to modify the stream position here
+}
+
+int wxANIHandler::DoGetImageCount(wxInputStream& stream)
+{
+ wxANIDecoder decoder;
+ if (!decoder.Load(stream)) // it's ok to modify the stream position here
+ return wxNOT_FOUND;
+
+ return decoder.GetFrameCount();
+}
+
+static bool CanReadICOOrCUR(wxInputStream *stream, wxUint16 resourceType)
+{
+ // It's ok to modify the stream position in this function.
+
+ if ( stream->IsSeekable() && stream->SeekI(0) == wxInvalidOffset )
+ {
+ return false;
+ }
+
+ ICONDIR iconDir;
+ if ( !stream->ReadAll(&iconDir, sizeof(iconDir)) )
+ {
+ return false;
+ }
+
+ return !iconDir.idReserved // reserved, must be 0
+ && wxUINT16_SWAP_ON_BE(iconDir.idType) == resourceType // either 1 or 2
+ && iconDir.idCount; // must contain at least one image
+}
+
+#endif // wxUSE_STREAMS
+
+#endif // wxUSE_ICO_CUR
+
#endif // wxUSE_IMAGE
projects / wxWidgets.git / blobdiff