Function

CGContextFlush

Forces all pending drawing operations in a window context to be rendered immediately to the destination device.

Declaration

void CGContextFlush(CGContextRef c);

Parameters

c

The window context to flush. If you pass a PDF context or a bitmap context, this function does nothing.

Discussion

When you call this function, Core Graphics immediately flushes the current drawing to the destination device (for example, a screen). Because the system software flushes a context automatically at the appropriate times, calling this function could have an adverse effect on performance. Under normal conditions, you do not need to call this function.

See Also

Managing Graphics Contexts

CGContextGetTypeID

Returns the type identifier for a graphics context.

CGContextRelease

Decrements the retain count of a graphics context.

CGContextRetain

Increments the retain count of a graphics context.

CGContextSynchronize

Marks a window context for update.