+
+int vid_gammaramps_serial = 0; // so other subsystems can poll if gamma parameters have changed
+void VID_BuildGammaTables(unsigned short *ramps, int rampsize)
+{
+ if (cachecolorenable)
+ {
+ BuildGammaTable16(1.0f, invpow(0.5, 1 - cachegrey[0]), cachewhite[0], cacheblack[0], cachecontrastboost, ramps, rampsize);
+ BuildGammaTable16(1.0f, invpow(0.5, 1 - cachegrey[1]), cachewhite[1], cacheblack[1], cachecontrastboost, ramps + rampsize, rampsize);
+ BuildGammaTable16(1.0f, invpow(0.5, 1 - cachegrey[2]), cachewhite[2], cacheblack[2], cachecontrastboost, ramps + rampsize*2, rampsize);
+ }
+ else
+ {
+ BuildGammaTable16(1.0f, cachegamma, cachecontrast, cachebrightness, cachecontrastboost, ramps, rampsize);
+ BuildGammaTable16(1.0f, cachegamma, cachecontrast, cachebrightness, cachecontrastboost, ramps + rampsize, rampsize);
+ BuildGammaTable16(1.0f, cachegamma, cachecontrast, cachebrightness, cachecontrastboost, ramps + rampsize*2, rampsize);
+ }
+
+ // LordHavoc: this code came from Ben Winslow and Zinx Verituse, I have
+ // immensely butchered it to work with variable framerates and fit in with
+ // the rest of darkplaces.
+ if (v_psycho.integer)
+ {
+ int x, y;
+ float t;
+ static float n[3], nd[3], nt[3];
+ static int init = true;
+ unsigned short *ramp;
+ gamma_forcenextframe = true;
+ if (init)
+ {
+ init = false;
+ for (x = 0;x < 3;x++)
+ {
+ n[x] = lhrandom(0, 1);
+ nd[x] = (rand()&1)?-0.25:0.25;
+ nt[x] = lhrandom(1, 8.2);
+ }
+ }
+
+ for (x = 0;x < 3;x++)
+ {
+ nt[x] -= cl.realframetime;
+ if (nt[x] < 0)
+ {
+ nd[x] = -nd[x];
+ nt[x] += lhrandom(1, 8.2);
+ }
+ n[x] += nd[x] * cl.realframetime;
+ n[x] -= floor(n[x]);
+ }
+
+ for (x = 0, ramp = ramps;x < 3;x++)
+ for (y = 0, t = n[x] - 0.75f;y < rampsize;y++, t += 0.75f * (2.0f / rampsize))
+ *ramp++ = (unsigned short)(cos(t*(M_PI*2.0)) * 32767.0f + 32767.0f);
+ }
+}
+