/* Can be called many times.
*/
static int
read_close( VipsImage *im, Read *read )
{
read_free( read );
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 );
}
int
vips__webp_read_file_header( const char *filename, VipsImage *out, int shrink )
{
Read *read;
if( !(read = read_new( filename, NULL, 0, shrink )) ) {
vips_error( "webp2vips",
_( "unable to open \"%s\"" ), filename );
return( -1 );
}
if( read_header( read, out ) ) {
read_free( read );
return( -1 );
}
read_free( read );
return( 0 );
}
int
vips__webp_read_buffer_header( const void *buf, size_t len, VipsImage *out,
int shrink )
{
Read *read;
if( !(read = read_new( NULL, buf, len, shrink )) ) {
vips_error( "webp2vips",
"%s", _( "unable to open buffer" ) );
return( -1 );
}
if( read_header( read, out ) ) {
read_free( read );
return( -1 );
}
read_free( read );
return( 0 );
}
static Read *
read_new( const char *filename, void *buf, size_t len )
{
Read *read;
unsigned char header[MINIMAL_HEADER];
if( !(read = VIPS_NEW( NULL, Read )) )
return( NULL );
read->filename = g_strdup( filename );
read->buf = buf;
read->len = len;
read->idec = NULL;
WebPInitDecoderConfig( &read->config );
if( filename ) {
if( vips__get_bytes( filename, header, MINIMAL_HEADER ) &&
WebPGetFeatures( header, MINIMAL_HEADER,
&read->config.input ) != VP8_STATUS_OK ) {
read_free( read );
return( NULL );
}
}
else {
if( WebPGetFeatures( read->buf, read->len,
&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 );
}
int
vips__webp_read_buffer( void *buf, size_t len, VipsImage *out )
{
Read *read;
if( !(read = read_new( NULL, buf, len )) ) {
vips_error( "webp2vips",
"%s", _( "unable to open buffer" ) );
return( -1 );
}
if( read_image( read, out ) )
return( -1 );
read_free( read );
return( 0 );
}
int
vips__webp_read_file( const char *filename, VipsImage *out )
{
Read *read;
if( !(read = read_new( filename, NULL, 0 )) ) {
vips_error( "webp2vips",
_( "unable to open \"%s\"" ), filename );
return( -1 );
}
if( read_image( read, out ) )
return( -1 );
read_free( read );
return( 0 );
}
void multiread_free(snd_susp_type a_susp)
{
read_susp_type susp = (read_susp_type) a_susp;
int j;
boolean active = false;
/* stdputstr("multiread_free: "); */
for (j = 0; j < susp->sf_info.channels; j++) {
if (susp->chan[j]) {
if (susp->chan[j]->refcnt) active = true;
else {
susp->chan[j] = NULL;
/* nyquist_printf("deactivating channel %d\n", j); */
}
}
}
if (!active) {
/* stdputstr("all channels freed, freeing susp now\n"); */
read_free(susp);
}
}
/* This has severe issues. See:
*
* http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=20017
*/
int
vips__magick_read_header( const char *filename, VipsImage *im,
gboolean all_frames, const char *density, int page )
{
Read *read;
#ifdef DEBUG
printf( "vips__magick_read_header: %s\n", filename );
#endif /*DEBUG*/
if( !(read = read_new( filename, im, all_frames, density, page )) )
return( -1 );
#ifdef DEBUG
printf( "vips__magick_read_header: pinging image ...\n" );
#endif /*DEBUG*/
read->image = PingImage( read->image_info, &read->exception );
if( !read->image ) {
vips_error( "magick2vips", _( "unable to ping file "
"\"%s\"\nlibMagick error: %s %s" ),
filename,
read->exception.reason, read->exception.description );
return( -1 );
}
if( parse_header( read ) )
return( -1 );
if( im->Xsize <= 0 || im->Ysize <= 0 ) {
vips_error( "magick2vips", "%s", _( "bad image size" ) );
return( -1 );
}
/* Just a header read: we can free the read early and save an fd.
*/
read_free( read );
return( 0 );
}
static void io_read (void)
{
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT) /* free format */
read_free();
else /* formatted */
{
int m, dummy1, dummy2;
switch (getformat(lua_check_string(1, "read"), &dummy1, &m, &dummy2))
{
case 's':
if (m < 0)
read_until_blank();
else
read_m(m);
lua_pushstring(add_char(0));
break;
case 'i': /* can read as float, since it makes no difference to Lua */
case 'f':
{
double d;
int result;
if (m < 0)
result = fscanf(in, "%lf", &d);
else
{
read_m(m);
result = sscanf(add_char(0), "%lf", &d);
}
if (result == 1)
lua_pushnumber(d);
else
lua_pushnil();
break;
}
}
}
}
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 );
}
