1 files changed, 287 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
new file mode 100644
index 0000000000..8768500682
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
@@ -0,0 +1,287 @@
+/** 
+ * @file class3\deferred\spotLightF.glsl
+ *
+ * $LicenseInfo:firstyear=2022&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2022, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+#extension GL_ARB_shader_texture_lod : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform sampler2DRect diffuseRect;
+uniform sampler2DRect specularRect;
+uniform sampler2DRect depthMap;
+uniform sampler2DRect normalMap;
+uniform samplerCube environmentMap;
+uniform sampler2DRect lightMap;
+uniform sampler2D noiseMap;
+uniform sampler2D projectionMap;
+uniform sampler2D lightFunc;
+
+uniform mat4 proj_mat; //screen space to light space
+uniform float proj_near; //near clip for projection
+uniform vec3 proj_p; //plane projection is emitting from (in screen space)
+uniform vec3 proj_n;
+uniform float proj_focus; //distance from plane to begin blurring
+uniform float proj_lod;  //(number of mips in proj map)
+uniform float proj_range; //range between near clip and far clip plane of projection
+uniform float proj_ambient_lod;
+uniform float proj_ambiance;
+uniform float near_clip;
+uniform float far_clip;
+
+uniform vec3 proj_origin; //origin of projection to be used for angular attenuation
+uniform float sun_wash;
+uniform int proj_shadow_idx;
+uniform float shadow_fade;
+
+uniform float size;
+uniform vec3 color;
+uniform float falloff;
+
+VARYING vec3 trans_center;
+VARYING vec4 vary_fragcoord;
+uniform vec2 screen_res;
+
+uniform mat4 inv_proj;
+
+void calcHalfVectors(vec3 h, vec3 n, vec3 v, out float nh, out float nv, out float vh);
+vec2 getScreenXY(vec4 clip_point);
+vec4 getNormalEnvIntensityFlags(vec2 screenpos, out vec3 n, out float envIntensity);
+vec3 srgb_to_linear(vec3 c);
+
+vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
+{
+    vec4 ret = texture2DLod(projectionMap, tc, lod);
+    ret.rgb = srgb_to_linear(ret.rgb);
+
+    vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
+    float det = min(lod/(proj_lod*0.5), 1.0);
+    float d = min(dist.x, dist.y);
+    d *= min(1, d * (proj_lod - lod));
+    float edge = 0.25*det;
+    ret *= clamp(d/edge, 0.0, 1.0);
+
+    return ret;
+}
+
+vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
+{
+    vec4 ret = texture2DLod(projectionMap, tc, lod);
+    ret.rgb = srgb_to_linear(ret.rgb);
+
+    vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
+    float det = min(lod/(proj_lod*0.5), 1.0);
+    float d = min(dist.x, dist.y);
+    float edge = 0.25*det;
+    ret *= clamp(d/edge, 0.0, 1.0);
+
+    return ret;
+}
+
+vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
+{
+    vec4 ret = texture2DLod(projectionMap, tc, lod);
+    ret.rgb = srgb_to_linear(ret.rgb);
+
+    vec2 dist = tc-vec2(0.5);
+    float d = dot(dist,dist);
+    ret *= min(clamp((0.25-d)/0.25, 0.0, 1.0), 1.0);
+
+    return ret;
+}
+
+vec4 getPosition(vec2 pos_screen);
+
+void main()
+{
+#if defined(LOCAL_LIGHT_KILL)
+    discard;
+#else
+    vec3 final_color = vec3(0,0,0);
+    vec2 tc          = getScreenXY(vary_fragcoord);
+    vec3 pos         = getPosition(tc).xyz;
+
+    vec3 lv = trans_center.xyz-pos.xyz;
+    float dist = length(lv);
+    if (dist >= size)
+    {
+        discard;
+    }
+    dist /= size;
+
+    float shadow = 1.0;
+
+    if (proj_shadow_idx >= 0)
+    {
+        vec4 shd = texture2DRect(lightMap, tc);
+        shadow = (proj_shadow_idx == 0) ? shd.b : shd.a;
+        shadow += shadow_fade;
+        shadow = clamp(shadow, 0.0, 1.0);        
+    }
+
+    float envIntensity;
+    vec3 n;
+    vec4 norm = getNormalEnvIntensityFlags(tc, n, envIntensity); // need `norm.w` for GET_GBUFFER_FLAG()
+
+    float l_dist = -dot(lv, proj_n);
+
+    vec4 proj_tc = (proj_mat * vec4(pos.xyz, 1.0));
+    if (proj_tc.z < 0.0)
+    {
+        discard;
+    }
+
+    proj_tc.xyz /= proj_tc.w;
+
+    float fa = falloff+1.0;
+    float dist_atten = min(1.0-(dist-1.0*(1.0-fa))/fa, 1.0);
+    dist_atten *= dist_atten;
+    dist_atten *= 2.0;
+
+    if (dist_atten <= 0.0)
+    {
+        discard;
+    }
+
+    lv = proj_origin-pos.xyz;
+    lv = normalize(lv);
+    float da = dot(n, lv);
+
+    vec3 diffuse = texture2DRect(diffuseRect, tc).rgb;
+    vec4 spec    = texture2DRect(specularRect, tc);
+    vec3 dlit    = vec3(0, 0, 0);
+
+    if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
+    {
+        vec3 colorDiffuse = vec3(0);
+        vec3 colorSpec    = vec3(0);
+
+        final_color = colorDiffuse + colorSpec;
+    }
+    else
+    {
+        float noise = texture2D(noiseMap, tc/128.0).b;
+        if (proj_tc.z > 0.0 &&
+            proj_tc.x < 1.0 &&
+            proj_tc.y < 1.0 &&
+            proj_tc.x > 0.0 &&
+            proj_tc.y > 0.0)
+        {
+            float amb_da = proj_ambiance;
+            float lit = 0.0;
+
+            if (da > 0.0)
+            {
+                lit = da * dist_atten * noise;
+
+                float diff = clamp((l_dist-proj_focus)/proj_range, 0.0, 1.0);
+                float lod = diff * proj_lod;
+
+                vec4 plcol = texture2DLodDiffuse(projectionMap, proj_tc.xy, lod);
+
+                dlit = color.rgb * plcol.rgb * plcol.a;
+
+                final_color = dlit*lit*diffuse*shadow;
+
+                amb_da += (da*0.5+0.5) /* * (1.0-shadow) */ * proj_ambiance;
+            }
+
+            //float diff = clamp((proj_range-proj_focus)/proj_range, 0.0, 1.0);
+            vec4 amb_plcol = texture2DLodAmbient(projectionMap, proj_tc.xy, proj_lod);
+
+            amb_da += (da*da*0.5+0.5) /* * (1.0-shadow) */ * proj_ambiance;
+            amb_da *= dist_atten * noise;
+            amb_da = min(amb_da, 1.0-lit);
+
+            final_color += amb_da*color.rgb*diffuse.rgb*amb_plcol.rgb*amb_plcol.a;
+        }
+
+        if (spec.a > 0.0)
+        {
+            dlit *= min(da*6.0, 1.0) * dist_atten;
+            vec3 v = -normalize(pos);
+
+            //vec3 ref = dot(pos+lv, n);
+            vec3 h = normalize(lv + v);
+            float nh, nv, vh;
+            calcHalfVectors(h, n, v, nh, nv, vh);
+            float sa = nh;
+            float fres = pow(1 - dot(h, v), 5)*0.4+0.5;
+
+            float gtdenom = 2 * nh;
+            float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));
+
+            if (nh > 0.0)
+            {
+                float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
+                vec3 speccol = dlit*scol*spec.rgb*shadow;
+                speccol = clamp(speccol, vec3(0), vec3(1));
+                final_color += speccol;
+            }
+        }
+
+        if (envIntensity > 0.0)
+        {
+            vec3 ref = reflect(normalize(pos), n);
+
+            //project from point pos in direction ref to plane proj_p, proj_n
+            vec3 pdelta = proj_p-pos;
+            float ds = dot(ref, proj_n);
+
+            if (ds < 0.0)
+            {
+                vec3 pfinal = pos + ref * dot(pdelta, proj_n)/ds;
+
+                vec4 stc = (proj_mat * vec4(pfinal.xyz, 1.0));
+
+                if (stc.z > 0.0)
+                {
+                    stc /= stc.w;
+
+                    if (stc.x < 1.0 &&
+                        stc.y < 1.0 &&
+                        stc.x > 0.0 &&
+                        stc.y > 0.0)
+                    {
+                        final_color += color.rgb * texture2DLodSpecular(projectionMap, stc.xy, (1 - spec.a) * (proj_lod * 0.6)).rgb * shadow * envIntensity;
+                    }
+                }
+            }
+        }
+    }
+
+    //not sure why, but this line prevents MATBUG-194
+    final_color = max(final_color, vec3(0.0));
+
+    //output linear colors as gamma correction happens down stream
+    frag_color.rgb = final_color;
+    frag_color.a = 0.0;
+#endif // LOCAL_LIGHT_KILL
+}