38dcce2da2
Previously the OSL Mix shader node was clamping the 2nd color component (green) to the 3rd color component (blue). Now every component is clamped on its own.
332 lines
7.2 KiB
Plaintext
332 lines
7.2 KiB
Plaintext
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "stdosl.h"
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#include "node_color.h"
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color node_mix_blend(float t, color col1, color col2)
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{
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return mix(col1, col2, t);
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}
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color node_mix_add(float t, color col1, color col2)
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{
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return mix(col1, col1 + col2, t);
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}
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color node_mix_mul(float t, color col1, color col2)
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{
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return mix(col1, col1 * col2, t);
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}
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color node_mix_screen(float t, color col1, color col2)
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{
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float tm = 1.0 - t;
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return color(1.0) - (color(tm) + t * (color(1.0) - col2)) * (color(1.0) - col1);
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}
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color node_mix_overlay(float t, color col1, color col2)
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{
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float tm = 1.0 - t;
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color outcol = col1;
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if (outcol[0] < 0.5)
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outcol[0] *= tm + 2.0 * t * col2[0];
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else
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outcol[0] = 1.0 - (tm + 2.0 * t * (1.0 - col2[0])) * (1.0 - outcol[0]);
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if (outcol[1] < 0.5)
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outcol[1] *= tm + 2.0 * t * col2[1];
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else
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outcol[1] = 1.0 - (tm + 2.0 * t * (1.0 - col2[1])) * (1.0 - outcol[1]);
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if (outcol[2] < 0.5)
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outcol[2] *= tm + 2.0 * t * col2[2];
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else
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outcol[2] = 1.0 - (tm + 2.0 * t * (1.0 - col2[2])) * (1.0 - outcol[2]);
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return outcol;
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}
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color node_mix_sub(float t, color col1, color col2)
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{
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return mix(col1, col1 - col2, t);
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}
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color node_mix_div(float t, color col1, color col2)
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{
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float tm = 1.0 - t;
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color outcol = col1;
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if (col2[0] != 0.0) outcol[0] = tm * outcol[0] + t * outcol[0] / col2[0];
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if (col2[1] != 0.0) outcol[1] = tm * outcol[1] + t * outcol[1] / col2[1];
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if (col2[2] != 0.0) outcol[2] = tm * outcol[2] + t * outcol[2] / col2[2];
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return outcol;
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}
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color node_mix_diff(float t, color col1, color col2)
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{
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return mix(col1, abs(col1 - col2), t);
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}
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color node_mix_dark(float t, color col1, color col2)
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{
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return min(col1, col2 * t);
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}
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color node_mix_light(float t, color col1, color col2)
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{
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return max(col1, col2 * t);
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}
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color node_mix_dodge(float t, color col1, color col2)
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{
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color outcol = col1;
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if (outcol[0] != 0.0) {
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float tmp = 1.0 - t * col2[0];
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if (tmp <= 0.0)
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outcol[0] = 1.0;
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else if ((tmp = outcol[0] / tmp) > 1.0)
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outcol[0] = 1.0;
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else
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outcol[0] = tmp;
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}
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if (outcol[1] != 0.0) {
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float tmp = 1.0 - t * col2[1];
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if (tmp <= 0.0)
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outcol[1] = 1.0;
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else if ((tmp = outcol[1] / tmp) > 1.0)
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outcol[1] = 1.0;
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else
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outcol[1] = tmp;
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}
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if (outcol[2] != 0.0) {
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float tmp = 1.0 - t * col2[2];
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if (tmp <= 0.0)
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outcol[2] = 1.0;
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else if ((tmp = outcol[2] / tmp) > 1.0)
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outcol[2] = 1.0;
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else
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outcol[2] = tmp;
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}
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return outcol;
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}
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color node_mix_burn(float t, color col1, color col2)
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{
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float tmp, tm = 1.0 - t;
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color outcol = col1;
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tmp = tm + t * col2[0];
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if (tmp <= 0.0)
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outcol[0] = 0.0;
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else if ((tmp = (1.0 - (1.0 - outcol[0]) / tmp)) < 0.0)
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outcol[0] = 0.0;
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else if (tmp > 1.0)
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outcol[0] = 1.0;
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else
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outcol[0] = tmp;
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tmp = tm + t * col2[1];
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if (tmp <= 0.0)
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outcol[1] = 0.0;
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else if ((tmp = (1.0 - (1.0 - outcol[1]) / tmp)) < 0.0)
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outcol[1] = 0.0;
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else if (tmp > 1.0)
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outcol[1] = 1.0;
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else
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outcol[1] = tmp;
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tmp = tm + t * col2[2];
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if (tmp <= 0.0)
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outcol[2] = 0.0;
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else if ((tmp = (1.0 - (1.0 - outcol[2]) / tmp)) < 0.0)
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outcol[2] = 0.0;
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else if (tmp > 1.0)
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outcol[2] = 1.0;
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else
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outcol[2] = tmp;
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return outcol;
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}
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color node_mix_hue(float t, color col1, color col2)
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{
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color outcol = col1;
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color hsv2 = rgb_to_hsv(col2);
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if (hsv2[1] != 0.0) {
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color hsv = rgb_to_hsv(outcol);
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hsv[0] = hsv2[0];
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color tmp = hsv_to_rgb(hsv);
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outcol = mix(outcol, tmp, t);
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}
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return outcol;
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}
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color node_mix_sat(float t, color col1, color col2)
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{
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float tm = 1.0 - t;
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color outcol = col1;
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color hsv = rgb_to_hsv(outcol);
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if (hsv[1] != 0.0) {
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color hsv2 = rgb_to_hsv(col2);
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hsv[1] = tm * hsv[1] + t * hsv2[1];
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outcol = hsv_to_rgb(hsv);
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}
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return outcol;
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}
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color node_mix_val(float t, color col1, color col2)
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{
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float tm = 1.0 - t;
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color hsv = rgb_to_hsv(col1);
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color hsv2 = rgb_to_hsv(col2);
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hsv[2] = tm * hsv[2] + t * hsv2[2];
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return hsv_to_rgb(hsv);
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}
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color node_mix_color(float t, color col1, color col2)
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{
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color outcol = col1;
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color hsv2 = rgb_to_hsv(col2);
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if (hsv2[1] != 0.0) {
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color hsv = rgb_to_hsv(outcol);
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hsv[0] = hsv2[0];
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hsv[1] = hsv2[1];
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color tmp = hsv_to_rgb(hsv);
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outcol = mix(outcol, tmp, t);
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}
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return outcol;
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}
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color node_mix_soft(float t, color col1, color col2)
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{
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float tm = 1.0 - t;
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color one = color(1.0);
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color scr = one - (one - col2) * (one - col1);
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return tm * col1 + t * ((one - col1) * col2 * col1 + col1 * scr);
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}
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color node_mix_linear(float t, color col1, color col2)
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{
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color outcol = col1;
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if (col2[0] > 0.5)
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outcol[0] = col1[0] + t * (2.0 * (col2[0] - 0.5));
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else
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outcol[0] = col1[0] + t * (2.0 * (col2[0]) - 1.0);
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if (col2[1] > 0.5)
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outcol[1] = col1[1] + t * (2.0 * (col2[1] - 0.5));
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else
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outcol[1] = col1[1] + t * (2.0 * (col2[1]) - 1.0);
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if (col2[2] > 0.5)
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outcol[2] = col1[2] + t * (2.0 * (col2[2] - 0.5));
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else
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outcol[2] = col1[2] + t * (2.0 * (col2[2]) - 1.0);
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return outcol;
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}
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color node_mix_clamp(color col)
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{
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color outcol = col;
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outcol[0] = clamp(col[0], 0.0, 1.0);
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outcol[1] = clamp(col[1], 0.0, 1.0);
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outcol[2] = clamp(col[2], 0.0, 1.0);
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return outcol;
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}
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shader node_mix(
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string type = "Mix",
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int Clamp = 0,
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float Fac = 0.5,
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color Color1 = color(0.0, 0.0, 0.0),
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color Color2 = color(0.0, 0.0, 0.0),
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output color Color = color(0.0, 0.0, 0.0))
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{
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float t = clamp(Fac, 0.0, 1.0);
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if (type == "Mix")
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Color = node_mix_blend(t, Color1, Color2);
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if (type == "Add")
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Color = node_mix_add(t, Color1, Color2);
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if (type == "Multiply")
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Color = node_mix_mul(t, Color1, Color2);
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if (type == "Screen")
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Color = node_mix_screen(t, Color1, Color2);
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if (type == "Overlay")
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Color = node_mix_overlay(t, Color1, Color2);
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if (type == "Subtract")
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Color = node_mix_sub(t, Color1, Color2);
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if (type == "Divide")
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Color = node_mix_div(t, Color1, Color2);
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if (type == "Difference")
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Color = node_mix_diff(t, Color1, Color2);
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if (type == "Darken")
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Color = node_mix_dark(t, Color1, Color2);
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if (type == "Lighten")
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Color = node_mix_light(t, Color1, Color2);
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if (type == "Dodge")
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Color = node_mix_dodge(t, Color1, Color2);
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if (type == "Burn")
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Color = node_mix_burn(t, Color1, Color2);
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if (type == "Hue")
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Color = node_mix_hue(t, Color1, Color2);
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if (type == "Saturation")
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Color = node_mix_sat(t, Color1, Color2);
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if (type == "Value")
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Color = node_mix_val (t, Color1, Color2);
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if (type == "Color")
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Color = node_mix_color(t, Color1, Color2);
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if (type == "Soft Light")
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Color = node_mix_soft(t, Color1, Color2);
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if (type == "Linear Light")
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Color = node_mix_linear(t, Color1, Color2);
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if (Clamp)
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Color = node_mix_clamp(Color);
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}
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