Set a layer's destination viewport
#include <gf/gf.h> void gf_layer_set_dst_viewport( gf_layer_t layer, int x1, int y1, int x2, int y2 );
The rectangle's coordinates must be within the bounds of the target display.
This function sets a layer's desination viewport.
There may be hardware limitations on viewports. Check these bits in gf_layer_info_t.caps filled in by gf_layer_query():
|Changes to the layer's parameters are enqueued. You need to call gf_layer_update() to make them take effect.|
QNX Graphics Framework
“Viewports” in the Working with Layers, Surfaces and Contexts chapter