- 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;
-}
-
-METHODDEF(boolean) empty_output_buffer (j_compress_ptr cinfo)
-{
- my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
-
- dest->stream->Write(dest->buffer, OUTPUT_BUF_SIZE);
- dest->pub.next_output_byte = dest->buffer;
- dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
- return TRUE;
-}
-
-METHODDEF(void) term_destination (j_compress_ptr cinfo)
-{
- my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
- size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
- /* Write any data remaining in the buffer */
- if (datacount > 0)
- dest->stream->Write(dest->buffer, datacount);
-}
-
-GLOBAL(void) jpeg_wxio_dest (j_compress_ptr cinfo, wxOutputStream& outfile)
-{
- my_dest_ptr dest;
-
- if (cinfo->dest == NULL) { /* first time for this JPEG object? */
- cinfo->dest = (struct jpeg_destination_mgr *)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
- sizeof(my_destination_mgr));
- }
-
- dest = (my_dest_ptr) cinfo->dest;
- dest->pub.init_destination = init_destination;
- dest->pub.empty_output_buffer = empty_output_buffer;
- dest->pub.term_destination = term_destination;
- dest->stream = &outfile;
-}
-
-
-
-bool wxJPEGHandler::SaveFile( wxImage *image, wxOutputStream& stream )
-{
- struct jpeg_compress_struct cinfo;
- struct jpeg_error_mgr jerr;
- JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
- JSAMPLE *image_buffer;
- int stride; /* physical row width in image buffer */
-
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_compress(&cinfo);
- jpeg_wxio_dest(&cinfo, stream);
-
- cinfo.image_width = image->GetWidth();
- cinfo.image_height = image->GetHeight();
- cinfo.input_components = 3;
- cinfo.in_color_space = JCS_RGB;
- jpeg_set_defaults(&cinfo);
- jpeg_start_compress(&cinfo, TRUE);
-
- stride = cinfo.image_width * 3; /* JSAMPLEs per row in image_buffer */
- image_buffer = image->GetData();
- while (cinfo.next_scanline < cinfo.image_height) {
- row_pointer[0] = &image_buffer[cinfo.next_scanline * stride];
- jpeg_write_scanlines( &cinfo, row_pointer, 1 );
- }
- jpeg_finish_compress(&cinfo);
- jpeg_destroy_compress(&cinfo);
-
- return TRUE;
-}
-#endif // wxUSE_STREAMS
-
-#endif
-
-// wxUSE_LIBJPEG
-
-
-
-//-----------------------------------------------------------------------------
-// wxBMPHandler
-//-----------------------------------------------------------------------------
-
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
-#endif
-
-#if wxUSE_STREAMS
-bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream )
-{
- unsigned char *data, *ptr;
- int done, i, bpp, planes, comp, ncolors, line, column,
- linesize, linepos, rshift = 0, gshift = 0, bshift = 0;
- unsigned char aByte;
- short int word;
- long int dbuf[4], dword, rmask = 0, gmask = 0, bmask = 0, offset,
- size;
- off_t start_offset = stream.TellI();
- signed char bbuf[4];
- struct _cmap
- {
- unsigned char r, g, b;
- }
- *cmap = NULL;
-#ifndef BI_RGB
-#define BI_RGB 0
-#define BI_RLE8 1
-#define BI_RLE4 2
-#endif
-
-#ifndef BI_BITFIELDS
-#define BI_BITFIELDS 3
-#endif
-
- image->Destroy();
-
- done = 0;
- /*
- * Reading the bmp header
- */
-
- stream.Read(&bbuf, 2);
-
- stream.Read(dbuf, 4 * 4);
-
- size = dbuf[0];
- offset = dbuf[2];
-
- stream.Read(dbuf, 4 * 2);
- int width = (int)dbuf[0];
- int height = (int)dbuf[1];
- if (width > 32767)
- {
- wxLogError( "Image width > 32767 pixels for file\n" );
- return FALSE;
- }
- if (height > 32767)
- {
- wxLogError( "Image height > 32767 pixels for file\n" );
- return FALSE;
- }
- stream.Read(&word, 2);
- planes = (int)word;
- stream.Read(&word, 2);
- bpp = (int)word;
- if (bpp != 1 && bpp != 4 && bpp != 8 && bpp && 16 && bpp != 24 && bpp != 32)
- {
- wxLogError( "unknown bitdepth in file\n" );
- return FALSE;
- }
- stream.Read(dbuf, 4 * 4);
- comp = (int)dbuf[0];
- if (comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && comp != BI_BITFIELDS)
- {
- wxLogError( "unknown encoding in Windows BMP file\n" );
- return FALSE;
- }
- stream.Read(dbuf, 4 * 2);
- ncolors = (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)))
- {
- wxLogError( "encoding of BMP doesn't match bitdepth\n" );
- return FALSE;
- }
- if (bpp < 16)
- {
- cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
-
- if (!cmap)
- {
- wxLogError( "Cannot allocate RAM for color map in BMP file\n" );
- return FALSE;
- }
- }
- else
- cmap = NULL;
-
- image->Create( width, height );
- ptr = image->GetData();
- if (!ptr)
- {
- wxLogError( "Cannot allocate RAM for RGB data in file\n" );
- if (cmap)
- free(cmap);
- return FALSE;
- }
-
- /*
- * Reading the palette, if it exists.
- */
- if (bpp < 16 && ncolors != 0)
- {
- for (i = 0; i < ncolors; i++)
- {
- stream.Read(bbuf, 4);
- cmap[i].b = bbuf[0];
- cmap[i].g = bbuf[1];
- cmap[i].r = bbuf[2];
- }
- }
- else if (bpp == 16 || bpp == 32)
projects / wxWidgets.git / blobdiff