/* Make a new buffer.
*/
VipsBuffer *
vips_buffer_new( VipsImage *im, VipsRect *area )
{
VipsBuffer *buffer;
buffer = g_new( VipsBuffer, 1 );
buffer->ref_count = 1;
buffer->im = im;
buffer->area = *area;
buffer->done = FALSE;
buffer->cache = NULL;
buffer->bsize = (size_t) VIPS_IMAGE_SIZEOF_PEL( im ) *
area->width * area->height;
if( !(buffer->buf = vips_tracked_malloc( buffer->bsize )) ) {
vips_buffer_unref( buffer );
return( NULL );
}
#ifdef DEBUG
printf( "** vips_buffer_new: left = %d, top = %d, "
"width = %d, height = %d (%p)\n",
buffer->area.left, buffer->area.top,
buffer->area.width, buffer->area.height,
buffer );
#endif /*DEBUG*/
#ifdef DEBUG
g_mutex_lock( vips__global_lock );
vips__buffers_all = g_slist_prepend( vips__buffers_all, buffer );
printf( "%d buffers in vips\n", g_slist_length( vips__buffers_all ) );
g_mutex_unlock( vips__global_lock );
#endif /*DEBUG*/
return( buffer );
}
static int
buffer_move( VipsBuffer *buffer, VipsRect *area )
{
VipsImage *im = buffer->im;
size_t new_bsize;
g_assert( buffer->ref_count == 1 );
vips_buffer_undone( buffer );
g_assert( !buffer->done );
buffer->area = *area;
new_bsize = (size_t) VIPS_IMAGE_SIZEOF_PEL( im ) *
area->width * area->height;
if( buffer->bsize < new_bsize ||
!buffer->buf ) {
buffer->bsize = new_bsize;
VIPS_FREEF( vips_tracked_free, buffer->buf );
if( !(buffer->buf = vips_tracked_malloc( buffer->bsize )) )
return( -1 );
}
return( 0 );
}
