- return NULL;
-}
-
-void wxImage::InitStandardHandlers()
-{
- AddHandler( new wxBMPHandler );
-#if wxUSE_LIBPNG
- AddHandler( new wxPNGHandler );
-#endif
-#if wxUSE_LIBJPEG
- AddHandler( new wxJPEGHandler );
-#endif
-}
-
-void wxImage::CleanUpHandlers()
-{
- wxNode *node = sm_handlers.First();
- while (node)
- {
- wxImageHandler *handler = (wxImageHandler *)node->Data();
- wxNode *next = node->Next();
- delete handler;
- delete node;
- node = next;
- }
-}
-
-//-----------------------------------------------------------------------------
-// wxImageHandler
-//-----------------------------------------------------------------------------
-
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxImageHandler,wxObject)
-#endif
-
-#if wxUSE_STREAMS
-bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream) )
-{
- return FALSE;
-}
-
-bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream) )
-{
- return FALSE;
-}
-#endif // wxUSE_STREAMS
-
-//-----------------------------------------------------------------------------
-// wxPNGHandler
-//-----------------------------------------------------------------------------
-
-#if wxUSE_LIBPNG
-
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxPNGHandler,wxImageHandler)
-#endif
-
-
-#if wxUSE_STREAMS
-static void _PNG_stream_reader( png_structp png_ptr, png_bytep data, png_size_t length )
-{
- ((wxInputStream*) png_get_io_ptr( png_ptr )) -> Read(data, length);
-}
-
-static void _PNG_stream_writer( png_structp png_ptr, png_bytep data, png_size_t length )
-{
- ((wxOutputStream*) png_get_io_ptr( png_ptr )) -> Write(data, length);
-}
-
-bool wxPNGHandler::LoadFile( wxImage *image, wxInputStream& stream )
-{
- // VZ: as this function uses setjmp() the only fool proof error handling
- // method is to use goto (setjmp is not really C++ dtors friendly...)
-
- unsigned char **lines = (unsigned char **) NULL;
- unsigned int i;
- png_infop info_ptr = (png_infop) NULL;
-
- image->Destroy();
-
- png_structp png_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING,
- (voidp) NULL,
- (png_error_ptr) NULL,
- (png_error_ptr) NULL );
- if (!png_ptr)
- goto error;
-
- info_ptr = png_create_info_struct( png_ptr );
- if (!info_ptr)
- goto error;
-
- if (setjmp(png_ptr->jmpbuf))
- goto error;
-
- if (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
- goto error;
-
- png_set_read_fn( png_ptr, &stream, _PNG_stream_reader);
-
- png_uint_32 width,height;
- int bit_depth,color_type,interlace_type;
-
- png_read_info( png_ptr, info_ptr );
- png_get_IHDR( png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, (int*) NULL, (int*) NULL );
-
- if (color_type == PNG_COLOR_TYPE_PALETTE)
- png_set_expand( png_ptr );
-
- png_set_strip_16( png_ptr );
- png_set_packing( png_ptr );
- if (png_get_valid( png_ptr, info_ptr, PNG_INFO_tRNS))
- png_set_expand( png_ptr );
- png_set_filler( png_ptr, 0xff, PNG_FILLER_AFTER );
-
- image->Create( width, height );
-
- if (!image->Ok())
- goto error;
-
- lines = (unsigned char **)malloc( height * sizeof(unsigned char *) );
- if (lines == NULL)
- goto error;
-
- for (i = 0; i < height; i++)
- {
- if ((lines[i] = (unsigned char *)malloc(width * (sizeof(unsigned char) * 4))) == NULL)
- {
- for ( unsigned int n = 0; n < i; n++ )
- free( lines[n] );
- goto error;
- }
- }
-
- // loaded successfully!
- {
- int transp = 0;
- png_read_image( png_ptr, lines );
- png_destroy_read_struct( &png_ptr, &info_ptr, (png_infopp) NULL );
- unsigned char *ptr = image->GetData();
- if ((color_type == PNG_COLOR_TYPE_GRAY) ||
- (color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
- {
- for (unsigned int y = 0; y < height; y++)
- {
- unsigned char *ptr2 = lines[y];
- for (unsigned int x = 0; x < width; x++)
- {
- unsigned char r = *ptr2++;
- unsigned char a = *ptr2++;
- if (a < 128)
- {
- *ptr++ = 255;
- *ptr++ = 0;
- *ptr++ = 255;
- transp = 1;
- }
- else
- {
- *ptr++ = r;
- *ptr++ = r;
- *ptr++ = r;
- }
- }
- }
- }
- else
- {
- for (unsigned int y = 0; y < height; y++)
- {
- unsigned char *ptr2 = lines[y];
- for (unsigned int x = 0; x < width; x++)
- {
- unsigned char r = *ptr2++;
- unsigned char g = *ptr2++;
- unsigned char b = *ptr2++;
- unsigned char a = *ptr2++;
- if (a < 128)
- {
- *ptr++ = 255;
- *ptr++ = 0;
- *ptr++ = 255;
- transp = 1;
- }
- else
- {
- if ((r == 255) && (g == 0) && (b == 255)) r = 254;
- *ptr++ = r;
- *ptr++ = g;
- *ptr++ = b;
- }
- }
- }
- }
-
- for ( unsigned int j = 0; j < height; j++ )
- free( lines[j] );
- free( lines );
-
- if (transp)
- {
- image->SetMaskColour( 255, 0, 255 );
- }
- else
- {
- image->SetMask( FALSE );
- }
- }
-
- return TRUE;
-
-error:
- wxLogError(_("Couldn't load a PNG image - probably file is corrupted."));
-
- if ( image->Ok() )
- {
- image->Destroy();
- }
-
- if ( lines )
- {
- free( lines );
- }
-
- if ( png_ptr )
- {
- if ( info_ptr )
- {
- png_destroy_read_struct( &png_ptr, &info_ptr, (png_infopp) NULL );
- free(info_ptr);
- }
- else
- png_destroy_read_struct( &png_ptr, (png_infopp) NULL, (png_infopp) NULL );
- }
- return FALSE;
-}
-
-
-bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream )
-{
- {
- png_structp png_ptr = png_create_write_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
- if (!png_ptr)
- {
- return FALSE;
- }
-
- png_infop info_ptr = png_create_info_struct(png_ptr);
- if (info_ptr == NULL)
- {
- png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
- return FALSE;
- }
-
- if (setjmp(png_ptr->jmpbuf))
- {
- png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
- return FALSE;
- }
-
- png_set_write_fn( png_ptr, &stream, _PNG_stream_writer, NULL);
-
- png_set_IHDR( png_ptr, info_ptr, image->GetWidth(), image->GetHeight(), 8,
- PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
- PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
-
- png_color_8 sig_bit;
- sig_bit.red = 8;
- sig_bit.green = 8;
- sig_bit.blue = 8;
- sig_bit.alpha = 8;
- png_set_sBIT( png_ptr, info_ptr, &sig_bit );
- png_write_info( png_ptr, info_ptr );
- png_set_shift( png_ptr, &sig_bit );
- png_set_packing( png_ptr );
-
- unsigned char *data = (unsigned char *)malloc( image->GetWidth()*4 );
- if (!data)
- {
- png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
- return FALSE;
- }
-
- for (int y = 0; y < image->GetHeight(); y++)
- {
- unsigned char *ptr = image->GetData() + (y * image->GetWidth() * 3);
- for (int x = 0; x < image->GetWidth(); x++)
- {
- data[(x << 2) + 0] = *ptr++;
- data[(x << 2) + 1] = *ptr++;
- data[(x << 2) + 2] = *ptr++;
- if ((data[(x << 2) + 0] == image->GetMaskRed()) &&
- (data[(x << 2) + 1] == image->GetMaskGreen()) &&
- (data[(x << 2) + 2] == image->GetMaskBlue()))
- {
- data[(x << 2) + 3] = 0;
- }
- else
- {
- data[(x << 2) + 3] = 255;
- }
- }
- png_bytep row_ptr = data;
- png_write_rows( png_ptr, &row_ptr, 1 );
- }
-
- free(data);
- png_write_end( png_ptr, info_ptr );
- png_destroy_write_struct( &png_ptr, (png_infopp)&info_ptr );
- }
- return TRUE;
-}
-#endif // wxUSE_STREAMS
-
-#endif
-
- // wxUSE_LIBPNG
-
-
-//-----------------------------------------------------------------------------
-// wxJPEGHandler
-//-----------------------------------------------------------------------------
-
-#if wxUSE_LIBJPEG
-
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxJPEGHandler,wxImageHandler)
-#endif
-
-#if wxUSE_STREAMS
-
-
-//------------- JPEG Data Source Manager
-
-typedef struct {
- struct jpeg_source_mgr pub; /* public fields */
-
- JOCTET* buffer; /* start of buffer */
-} my_source_mgr;
-
-typedef my_source_mgr * my_src_ptr;
-
-METHODDEF(void) my_init_source ( j_decompress_ptr cinfo )
-{
-}
-
-METHODDEF(boolean) my_fill_input_buffer ( j_decompress_ptr cinfo )
-{
- return TRUE;
-}
-
-METHODDEF(void) my_skip_input_data ( j_decompress_ptr cinfo, long num_bytes )
-{
- my_src_ptr src = (my_src_ptr) cinfo->src;
-
- src->pub.next_input_byte += (size_t) num_bytes;
- src->pub.bytes_in_buffer -= (size_t) num_bytes;
-}
-
-METHODDEF(void) my_term_source ( j_decompress_ptr cinfo )
-{
- my_src_ptr src = (my_src_ptr) cinfo->src;
-
- free (src->buffer);
-}
-
-void jpeg_wxio_src( j_decompress_ptr cinfo, wxInputStream& infile )
-{
- my_src_ptr src;
-
- if (cinfo->src == NULL) { /* first time for this JPEG object? */
- cinfo->src = (struct jpeg_source_mgr *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
- sizeof(my_source_mgr));
- src = (my_src_ptr) cinfo->src;
- }
- src = (my_src_ptr) cinfo->src;
- src->pub.bytes_in_buffer = infile.StreamSize(); /* forces fill_input_buffer on first read */
- src->buffer = (JOCTET *) malloc (infile.StreamSize());
- src->pub.next_input_byte = src->buffer; /* until buffer loaded */
- infile.Read(src->buffer, infile.StreamSize());
-
- src->pub.init_source = my_init_source;
- src->pub.fill_input_buffer = my_fill_input_buffer;
- src->pub.skip_input_data = my_skip_input_data;
- src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
- src->pub.term_source = my_term_source;
-}
-
-
-
-bool wxJPEGHandler::LoadFile( wxImage *image, wxInputStream& stream )
-{
- struct jpeg_decompress_struct cinfo;
- struct jpeg_error_mgr jerr;
- JSAMPARRAY tempbuf;
- unsigned char *ptr;
- unsigned stride;
-
- image->Destroy();
- cinfo.err = jpeg_std_error( &jerr );
- jpeg_create_decompress( &cinfo );
- jpeg_wxio_src( &cinfo, stream );
- jpeg_read_header( &cinfo, TRUE );
- cinfo.out_color_space = JCS_RGB;
- jpeg_start_decompress( &cinfo );
-
- image->Create( cinfo.image_width, cinfo.image_height );
- if (!image->Ok()) {
- jpeg_finish_decompress( &cinfo );
- jpeg_destroy_decompress( &cinfo );
- return FALSE;
- }
- image->SetMask( FALSE );
- ptr = image->GetData();
- stride = cinfo.output_width * 3;
- tempbuf = (*cinfo.mem->alloc_sarray)
- ((j_common_ptr) &cinfo, JPOOL_IMAGE, stride, 1 );
-
- while ( cinfo.output_scanline < cinfo.output_height ) {
- jpeg_read_scanlines( &cinfo, tempbuf, 1 );
- memcpy( ptr, tempbuf[0], stride );
- ptr += stride;
- }
- jpeg_finish_decompress( &cinfo );
- jpeg_destroy_decompress( &cinfo );
- return TRUE;
-}
-
-
-
-
-
-typedef struct {
- struct jpeg_destination_mgr pub;
-
- wxOutputStream *stream;
- JOCTET * buffer;
-} my_destination_mgr;
-
-typedef my_destination_mgr * my_dest_ptr;
-
-#define OUTPUT_BUF_SIZE 4096 /* choose an efficiently fwrite'able size */
-
-METHODDEF(void) init_destination (j_compress_ptr cinfo)
-{
- my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
-
- /* Allocate the output buffer --- it will be released when done with image */
- dest->buffer = (JOCTET *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- OUTPUT_BUF_SIZE * sizeof(JOCTET));
- dest->pub.next_output_byte = dest->buffer;
- dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
projects / wxWidgets.git / blobdiff