Lines Matching defs:contrast
1978 DBG (dbg_level, "%s: [24] contrast: %d\n", func,
1979 window->descriptor.contrast);
5729 brightness_contrast_func (double brightness, double contrast, double value)
5740 /* apply contrast */
5741 if (contrast < 0.0)
5749 nvalue = 0.5 * pow (nvalue * 2.0 , (double) (1.0 + contrast));
5763 power = (contrast == 1.0) ? 127 : 1.0 / (1.0 - contrast);
5795 double contrast;
5832 /* prepare for emulating contrast, brightness ... via the gamma-table */
5835 contrast = SANE_UNFIX (s->val[OPT_CONTRAST].w);
5836 contrast /= 100;
5838 DBG (3, "send_gamma: brightness: %f, contrast: %f\n", brightness, contrast);
5886 /* Emulate brightness and contrast (at least the Avision AV6[2,3]0
5894 v1 = (brightness_contrast_func (brightness, contrast, v1) );
5895 v2 = (brightness_contrast_func (brightness, contrast, v2) );
6406 cmd.window.descriptor.contrast = 128;
7171 /* contrast */