static int read_image( Read *read, VipsImage *out ) { VipsImage **t = (VipsImage **) vips_object_local_array( VIPS_OBJECT( out ), 3 ); guint64 length; void *data; int fd; webp_decoder decoder; /* libwebp makes streaming very hard. We have to read to a full memory * buffer, then copy to out. * * mmap the input file, it's slightly quicker. */ t[0] = vips_image_new_buffer(); if( read_header( read, t[0] ) ) return( -1 ); if( vips_image_write_prepare( t[0] ) ) return( -1 ); if( !(fd = vips__open_image_read( read->filename )) ) return( -1 ); if( (length = vips_file_length( fd )) < 0 ) { vips_tracked_close( fd ); return( -1 ); } if( !(data = vips__mmap( fd, FALSE, length, 0 )) ) { vips_tracked_close( fd ); return( -1 ); } if( t[0]->Bands == 3 ) decoder = WebPDecodeRGBInto; else decoder = WebPDecodeRGBAInto; if( !decoder( (uint8_t *) data, length, VIPS_IMAGE_ADDR( t[0], 0, 0 ), VIPS_IMAGE_SIZEOF_IMAGE( t[0] ), VIPS_IMAGE_SIZEOF_LINE( t[0] ) ) ) { vips__munmap( data, length ); vips_tracked_close( fd ); vips_error( "webp2vips", "%s", _( "unable to read pixels" ) ); return( -1 ); } vips__munmap( data, length ); vips_tracked_close( fd ); if( vips_image_write( t[0], out ) ) return( -1 ); return( 0 ); }
static Read * read_new( const char *filename, void *data, size_t length ) { Read *read; if( !(read = VIPS_NEW( NULL, Read )) ) return( NULL ); read->filename = g_strdup( filename ); read->data = data; read->length = length; read->fd = 0; read->idec = NULL; if( read->filename ) { /* libwebp makes streaming from a file source very hard. We * have to read to a full memory buffer, then copy to out. * * mmap the input file, it's slightly quicker. */ if( (read->fd = vips__open_image_read( read->filename )) < 0 || (read->length = vips_file_length( read->fd )) < 0 || !(read->data = vips__mmap( read->fd, FALSE, read->length, 0 )) ) { read_free( read ); return( NULL ); } } WebPInitDecoderConfig( &read->config ); if( WebPGetFeatures( read->data, MINIMAL_HEADER, &read->config.input ) != VP8_STATUS_OK ) { read_free( read ); return( NULL ); } if( read->config.input.has_alpha ) read->config.output.colorspace = MODE_RGBA; else read->config.output.colorspace = MODE_RGB; read->config.options.use_threads = TRUE; return( read ); }
static Read * read_new( const char *filename, const void *data, size_t length, int shrink ) { Read *read; if( !(read = VIPS_NEW( NULL, Read )) ) return( NULL ); read->filename = g_strdup( filename ); read->data = data; read->length = length; read->shrink = shrink; read->fd = 0; read->idec = NULL; if( read->filename ) { /* libwebp makes streaming from a file source very hard. We * have to read to a full memory buffer, then copy to out. * * mmap the input file, it's slightly quicker. */ if( (read->fd = vips__open_image_read( read->filename )) < 0 || (read->length = vips_file_length( read->fd )) < 0 || !(read->data = vips__mmap( read->fd, FALSE, read->length, 0 )) ) { read_free( read ); return( NULL ); } } WebPInitDecoderConfig( &read->config ); if( WebPGetFeatures( read->data, MINIMAL_HEADER, &read->config.input ) != VP8_STATUS_OK ) { read_free( read ); return( NULL ); } if( read->config.input.has_alpha ) read->config.output.colorspace = MODE_RGBA; else read->config.output.colorspace = MODE_RGB; read->config.options.use_threads = 1; read->width = read->config.input.width / read->shrink; read->height = read->config.input.height / read->shrink; if( read->width == 0 || read->height == 0 ) { vips_error( "webp", "%s", _( "bad setting for shrink" ) ); return( NULL ); } if( read->shrink > 1 ) { read->config.options.use_scaling = 1; read->config.options.scaled_width = read->width; read->config.options.scaled_height = read->height; } return( read ); }
/* Load up a file as a string. */ char * vips__file_read( FILE *fp, const char *filename, size_t *length_out ) { gint64 len; size_t read; char *str; len = vips_file_length( fileno( fp ) ); if( len > 1024 * 1024 * 1024 ) { /* Over a gb? Seems crazy! */ vips_error( "vips__file_read", _( "\"%s\" too long" ), filename ); return( NULL ); } if( len == -1 ) { int size; /* Can't get length: read in chunks and realloc() to end of * file. */ str = NULL; len = 0; size = 0; do { char *str2; size += 1024; if( !(str2 = realloc( str, size )) ) { free( str ); vips_error( "vips__file_read", "%s", _( "out of memory" ) ); return( NULL ); } str = str2; /* -1 to allow space for an extra NULL we add later. */ read = fread( str + len, sizeof( char ), (size - len - 1) / sizeof( char ), fp ); len += read; } while( !feof( fp ) ); #ifdef DEBUG printf( "read %ld bytes from unseekable stream\n", len ); #endif /*DEBUG*/ } else { /* Allocate memory and fill. */ if( !(str = vips_malloc( NULL, len + 1 )) ) return( NULL ); rewind( fp ); read = fread( str, sizeof( char ), (size_t) len, fp ); if( read != (size_t) len ) { vips_free( str ); vips_error( "vips__file_read", _( "error reading from file \"%s\"" ), filename ); return( NULL ); } } str[len] = '\0'; if( length_out ) *length_out = len; return( str ); }