Signal

VipsTargetCustom::read

Declaration 

gint64
read (
  VipsTargetCustom* self,
  gpointer buffer,
  gint64 size,
  gpointer user_data
)

Description [src]

This signal is emitted to read bytes from the target into buffer.

The handler for an unreadable target should always return -1.

Default handler:
Signal can be directly emitted on objects from user code

Parameters

buffer

Type: gpointer

%gpointer, buffer to fill.

The argument can be NULL.
The data is owned by the caller of the function.
size

Type: gint64

%gint64, size of buffer.

Return value

Type: gint64

The number of bytes read. Return 0 for EOF.