105 lines
49 KiB
Plaintext
105 lines
49 KiB
Plaintext
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//!DESC RAVU-Lite (step1, r2)
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//!HOOK LUMA
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//!BIND HOOKED
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//!BIND ravu_lite_lut2
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//!SAVE ravu_lite_int
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//!WHEN HOOKED.w OUTPUT.w / 0.707106 < HOOKED.h OUTPUT.h / 0.707106 < *
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//!COMPONENTS 4
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vec4 hook() {
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float luma0 = HOOKED_texOff(vec2(-1.0, -1.0)).x;
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float luma1 = HOOKED_texOff(vec2(-1.0, 0.0)).x;
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float luma2 = HOOKED_texOff(vec2(-1.0, 1.0)).x;
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float luma3 = HOOKED_texOff(vec2(0.0, -1.0)).x;
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float luma4 = HOOKED_texOff(vec2(0.0, 0.0)).x;
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float luma5 = HOOKED_texOff(vec2(0.0, 1.0)).x;
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float luma6 = HOOKED_texOff(vec2(1.0, -1.0)).x;
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float luma7 = HOOKED_texOff(vec2(1.0, 0.0)).x;
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float luma8 = HOOKED_texOff(vec2(1.0, 1.0)).x;
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vec3 abd = vec3(0.0);
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float gx, gy;
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gx = (luma3-luma0);
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gy = (luma1-luma0);
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.1018680644198163;
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gx = (luma4-luma1);
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gy = (luma2-luma0)/2.0;
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.11543163961422666;
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gx = (luma5-luma2);
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gy = (luma2-luma1);
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.1018680644198163;
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gx = (luma6-luma0)/2.0;
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gy = (luma4-luma3);
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.11543163961422666;
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gx = (luma7-luma1)/2.0;
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gy = (luma5-luma3)/2.0;
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.13080118386382833;
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gx = (luma8-luma2)/2.0;
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gy = (luma5-luma4);
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.11543163961422666;
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gx = (luma6-luma3);
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gy = (luma7-luma6);
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.1018680644198163;
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gx = (luma7-luma4);
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gy = (luma8-luma6)/2.0;
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.11543163961422666;
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gx = (luma8-luma5);
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gy = (luma8-luma7);
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abd += vec3(gx * gx, gx * gy, gy * gy) * 0.1018680644198163;
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float a = abd.x, b = abd.y, d = abd.z;
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float T = a + d, D = a * d - b * b;
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float delta = sqrt(max(T * T / 4.0 - D, 0.0));
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float L1 = T / 2.0 + delta, L2 = T / 2.0 - delta;
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float sqrtL1 = sqrt(L1), sqrtL2 = sqrt(L2);
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float theta = mix(mod(atan(L1 - a, b) + 3.141592653589793, 3.141592653589793), 0.0, abs(b) < 1.192092896e-7);
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float lambda = sqrtL1;
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float mu = mix((sqrtL1 - sqrtL2) / (sqrtL1 + sqrtL2), 0.0, sqrtL1 + sqrtL2 < 1.192092896e-7);
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float angle = floor(theta * 24.0 / 3.141592653589793);
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float strength = mix(mix(0.0, 1.0, lambda >= 0.004), mix(2.0, 3.0, lambda >= 0.05), lambda >= 0.016);
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float coherence = mix(mix(0.0, 1.0, mu >= 0.25), 2.0, mu >= 0.5);
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float coord_y = ((angle * 4.0 + strength) * 3.0 + coherence + 0.5) / 288.0;
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vec4 res = vec4(0.0), w;
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w = texture(ravu_lite_lut2, vec2(0.1, coord_y));
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res += luma0 * w + luma8 * w.wzyx;
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w = texture(ravu_lite_lut2, vec2(0.3, coord_y));
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res += luma1 * w + luma7 * w.wzyx;
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w = texture(ravu_lite_lut2, vec2(0.5, coord_y));
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res += luma2 * w + luma6 * w.wzyx;
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w = texture(ravu_lite_lut2, vec2(0.7, coord_y));
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res += luma3 * w + luma5 * w.wzyx;
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w = texture(ravu_lite_lut2, vec2(0.9, coord_y));
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res += luma4 * w;
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res = clamp(res, 0.0, 1.0);
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return res;
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}
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//!DESC RAVU-Lite (step2, r2)
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//!HOOK LUMA
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//!BIND HOOKED
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//!BIND ravu_lite_int
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//!WIDTH 2 HOOKED.w *
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//!HEIGHT 2 HOOKED.h *
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//!WHEN HOOKED.w OUTPUT.w / 0.707106 < HOOKED.h OUTPUT.h / 0.707106 < *
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//!COMPONENTS 1
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vec4 hook() {
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vec2 dir = fract(HOOKED_pos * HOOKED_size) - 0.5;
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int idx = int(dir.x > 0.0) * 2 + int(dir.y > 0.0);
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return vec4(ravu_lite_int_texOff(-dir)[idx], 0.0, 0.0, 0.0);
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}
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//!TEXTURE ravu_lite_lut2
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//!SIZE 5 288
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//!FORMAT rgba16f
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//!FILTER NEAREST
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