gf_layer_set_chroma()

Set a layer's chroma operation

Synopsis:

#include <gf/gf.h>

void gf_layer_set_chroma( gf_layer_t layer,
                          const gf_chroma_t * chroma );

Arguments:

layer

A pointer to a gf_layer_t handle of the layer you want to set the chroma operation for.

chroma

A pointer to a gf_chroma_t describing the new chroma operation.

Library:

gf

Description:

This function sets a layer's chroma operation. Chroma allows you extended control over how the layer is overlaid into the overall display.

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Changes to the layer's parameters are enqueued. You need to call gf_layer_update() to make them take effect.

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The chroma parameters normally control how the contents of the layer are compared with intersecting layers that are behind the specified layer.

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For the chroma operation, the attached layer can be thought of as the “source” while the layer(s) behind it can be thought of as the “destination”.

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Classification:

QNX Graphics Framework

See also:

gf_chroma_t, gf_layer_set_blending(), gf_layer_query(), gf_layer_update()