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gf_layer_set_contrast()

Set a layer's contrast level

Synopsis:

#include <gf/gf.h>

void gf_layer_set_contrast( gf_layer_t layer,
                            int contrast );

Arguments:

layer: A pointer to a gf_layer_t handle of the layer you want to set the contrast for.
contrast: The contrast level of layer, in the range of -127 to 128, with 0 indicating normal contrast.

Library:

gf

Description:

This function controls the contrast of a layer.

This function only affects layers in YUV format.
Changes to the layer's parameters are enqueued. You need to call gf_layer_update() to make them take effect. The gf_layer_update() call will return something other than GF_ERR_OK if the layer doesn't have the GF_LAYER_CAP_SET_CONTRAST attribute (see gf_layer_query()).

Classification:

QNX Graphics Framework

Safety:
Interrupt handler	No
Signal handler	No
Thread	Yes

See also:

gf_display_attach(), gf_layer_detach(), gf_layer_disable(), gf_layer_enable(), gf_layer_query(), gf_layer_set_brightness()