Merge branch 'DRTVWR-559' into DRTVWR-583

11 files changed, 71 insertions, 118 deletions

diff --git a/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl b/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl
index 6b7dc7ac1d..1c79748b49 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl
@@ -25,26 +25,23 @@
  
 /*[EXTRA_CODE_HERE]*/
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
 
 #ifndef HAS_DIFFUSE_LOOKUP
 uniform sampler2D diffuseMap;
 #endif
 
 
-VARYING vec4 vertex_color;
-VARYING vec2 vary_texcoord0;
-VARYING vec3 vary_texcoord1;
-VARYING vec3 vary_position;
+in vec4 vertex_color;
+in vec2 vary_texcoord0;
+in vec3 vary_texcoord1;
+in vec3 vary_position;
 
 uniform samplerCube environmentMap;
 
-vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
-
+vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten);
+vec3 legacy_adjust_fullbright(vec3 c);
+vec3 legacy_adjust(vec3 c);
 void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao);
 
 vec3 linear_to_srgb(vec3 c);
@@ -61,7 +58,7 @@ void main()
 #ifdef HAS_DIFFUSE_LOOKUP
 	vec4 color = diffuseLookup(vary_texcoord0.xy);
 #else
-	vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
+	vec4 color = texture(diffuseMap, vary_texcoord0.xy);
 #endif
 	
 	color.rgb *= vertex_color.rgb;
@@ -84,10 +81,13 @@ void main()
     vec3 norm = normalize(vary_texcoord1.xyz);
     vec4 spec = vec4(0,0,0,0);
     sampleReflectionProbesLegacy(ambenv, glossenv, legacyenv, vec2(0), pos.xyz, norm.xyz, spec.a, env_intensity);
-    applyLegacyEnv(color.rgb, legacyenv, spec, pos, norm, env_intensity);
 
+    color.rgb = legacy_adjust(color.rgb);
     color.rgb = srgb_to_linear(color.rgb);
-    color.rgb = fullbrightAtmosTransportFrag(color.rgb, additive, atten);
+    color.rgb = legacy_adjust_fullbright(color.rgb);
+    
+    applyLegacyEnv(color.rgb, legacyenv, spec, pos, norm, env_intensity);
+    color.rgb = atmosFragLighting(color.rgb, additive, atten);
 #endif
 
 	color.a = 1.0;
diff --git a/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
index e5341386bd..77e3b92385 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
@@ -52,11 +52,7 @@ vec3 legacy_adjust(vec3 c);
 
 #if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
 
 #ifdef HAS_SUN_SHADOW
 float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen);
@@ -77,9 +73,9 @@ uniform mat3 env_mat;
 
 uniform vec3 sun_dir;
 uniform vec3 moon_dir;
-VARYING vec2 vary_fragcoord;
+in vec2 vary_fragcoord;
 
-VARYING vec3 vary_position;
+in vec3 vary_position;
 
 uniform mat4 proj_mat;
 uniform mat4 inv_proj;
@@ -167,7 +163,7 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spe
 
             if (nh > 0.0)
             {
-                float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt / (nh*da);
+                float scol = fres*texture(lightFunc, vec2(nh, spec.a)).r*gt / (nh*da);
                 vec3 speccol = lit*scol*light_col.rgb*spec.rgb;
                 speccol = clamp(speccol, vec3(0), vec3(1));
                 col += speccol;
@@ -184,11 +180,7 @@ vec3 calcPointLightOrSpotLight(vec3 light_col, vec3 npos, vec3 diffuse, vec4 spe
 }
 
 #else
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_data[4];
-#else
-#define frag_data gl_FragData
-#endif
 #endif
 
 uniform sampler2D diffuseMap;  //always in sRGB space
@@ -200,7 +192,7 @@ uniform sampler2D bumpMap;
 #ifdef HAS_SPECULAR_MAP
 uniform sampler2D specularMap;
 
-VARYING vec2 vary_texcoord2;
+in vec2 vary_texcoord2;
 #endif
 
 uniform float env_intensity;
@@ -214,13 +206,13 @@ uniform float minimum_alpha;
 in vec3 vary_normal;
 in vec3 vary_tangent;
 flat in float vary_sign;
-VARYING vec2 vary_texcoord1;
+in vec2 vary_texcoord1;
 #else
-VARYING vec3 vary_normal;
+in vec3 vary_normal;
 #endif
 
-VARYING vec4 vertex_color;
-VARYING vec2 vary_texcoord0;
+in vec4 vertex_color;
+in vec2 vary_texcoord0;
 
 vec2 encode_normal(vec3 n);
 
@@ -228,7 +220,7 @@ vec2 encode_normal(vec3 n);
 vec3 getNormal(inout float glossiness)
 {
 #ifdef HAS_NORMAL_MAP
-	vec4 vNt = texture2D(bumpMap, vary_texcoord1.xy);
+	vec4 vNt = texture(bumpMap, vary_texcoord1.xy);
     glossiness *= vNt.a;
 	vNt.xyz = vNt.xyz * 2 - 1;
     float sign = vary_sign;
@@ -247,7 +239,7 @@ vec3 getNormal(inout float glossiness)
 vec4 getSpecular()
 {
 #ifdef HAS_SPECULAR_MAP
-    vec4 spec = texture2D(specularMap, vary_texcoord2.xy);
+    vec4 spec = texture(specularMap, vary_texcoord2.xy);
     spec.rgb *= specular_color.rgb;
 #else
     vec4 spec = vec4(specular_color.rgb, 1.0);
@@ -301,7 +293,7 @@ void main()
     waterClip();
 
     // diffcol == diffuse map combined with vertex color
-    vec4 diffcol = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 diffcol = texture(diffuseMap, vary_texcoord0.xy);
 	diffcol.rgb *= vertex_color.rgb;
 
     alphaMask(diffcol.a);
@@ -364,7 +356,7 @@ void main()
     if (glossiness > 0.0)  // specular reflection
     {
         float sa        = dot(normalize(refnormpersp), light_dir.xyz);
-        vec3  dumbshiny = sunlit_linear * shadow * (texture2D(lightFunc, vec2(sa, glossiness)).r);
+        vec3  dumbshiny = sunlit_linear * shadow * (texture(lightFunc, vec2(sa, glossiness)).r);
 
         // add the two types of shiny together
         vec3 spec_contrib = dumbshiny * spec.rgb;
@@ -395,7 +387,7 @@ void main()
             float gtdenom = 2 * nh;
             float gt = max(0,(min(gtdenom * nv / vh, gtdenom * nl / vh)));
 
-            float scol = shadow*fres*texture2D(lightFunc, vec2(nh, glossiness)).r*gt/(nh*nl);
+            float scol = shadow*fres*texture(lightFunc, vec2(nh, glossiness)).r*gt/(nh*nl);
             color.rgb += lit*scol*sunlit_linear.rgb*spec.rgb;
         }
 
diff --git a/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl
index 2da177ea7e..2a096a98ec 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/multiPointLightF.glsl
@@ -23,15 +23,9 @@
  * $/LicenseInfo$
  */
 
-#extension GL_ARB_texture_rectangle : enable
-
 /*[EXTRA_CODE_HERE]*/
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
 
 uniform sampler2D depthMap;
 uniform sampler2D diffuseRect;
@@ -49,7 +43,7 @@ uniform vec2  screen_res;
 uniform float far_z;
 uniform mat4  inv_proj;
 
-VARYING vec4 vary_fragcoord;
+in vec4 vary_fragcoord;
 
 void calcHalfVectors(vec3 lv, vec3 n, vec3 v, out vec3 h, out vec3 l, out float nh, out float nl, out float nv, out float vh, out float lightDist);
 float calcLegacyDistanceAttenuation(float distance, float falloff);
@@ -88,15 +82,15 @@ void main()
     vec3 n;
     vec4 norm = getNormalEnvIntensityFlags(tc, n, envIntensity); // need `norm.w` for GET_GBUFFER_FLAG()
 
-    vec4 spec    = texture2D(specularRect, tc);
-    vec3 diffuse = texture2D(diffuseRect, tc).rgb;
+    vec4 spec    = texture(specularRect, tc);
+    vec3 diffuse = texture(diffuseRect, tc).rgb;
 
     vec3  h, l, v = -normalize(pos);
     float nh, nv, vh, lightDist;
 
     if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
     {
-        vec3 colorEmissive = texture2D(emissiveRect, tc).rgb;
+        vec3 colorEmissive = texture(emissiveRect, tc).rgb;
         vec3 orm = spec.rgb;
         float perceptualRoughness = orm.g;
         float metallic = orm.b;
@@ -167,7 +161,7 @@ void main()
 
                         if (nh > 0.0)
                         {
-                            float scol = fres * texture2D(lightFunc, vec2(nh, spec.a)).r * gt / (nh * nl);
+                            float scol = fres * texture(lightFunc, vec2(nh, spec.a)).r * gt / (nh * nl);
                             col += lit * scol * light_col[i].rgb * spec.rgb;
                         }
                     }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/multiPointLightV.glsl b/indra/newview/app_settings/shaders/class3/deferred/multiPointLightV.glsl
index 831b3b2684..c2b9ed3d96 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/multiPointLightV.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/multiPointLightV.glsl
@@ -23,9 +23,9 @@
  * $/LicenseInfo$
  */
 
-ATTRIBUTE vec3 position;
+in vec3 position;
 
-VARYING vec4 vary_fragcoord;
+out vec4 vary_fragcoord;
 
 void main()
 {
diff --git a/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
index 33715d4d87..23120bbbbe 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
@@ -23,16 +23,9 @@
  * $/LicenseInfo$
  */
  
-#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 sampler2D diffuseRect;
 uniform sampler2D specularRect;
@@ -67,7 +60,7 @@ uniform float size;
 uniform vec3 color;
 uniform float falloff;
 
-VARYING vec4 vary_fragcoord;
+in vec4 vary_fragcoord;
 uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
@@ -118,7 +111,7 @@ void main()
     
     if (proj_shadow_idx >= 0)
     {
-        vec4 shd = texture2D(lightMap, tc);
+        vec4 shd = texture(lightMap, tc);
         shadow = (proj_shadow_idx==0)?shd.b:shd.a;
         shadow += shadow_fade;
         shadow = clamp(shadow, 0.0, 1.0);        
@@ -139,8 +132,8 @@ void main()
     float nh, nl, nv, vh, lightDist;
     calcHalfVectors(lv, n, v, h, l, nh, nl, nv, vh, lightDist);
 
-    vec3 diffuse = texture2D(diffuseRect, tc).rgb;
-    vec4 spec    = texture2D(specularRect, tc);
+    vec3 diffuse = texture(diffuseRect, tc).rgb;
+    vec4 spec    = texture(specularRect, tc);
     vec3 dlit    = vec3(0, 0, 0);
     vec3 slit    = vec3(0, 0, 0);
 
@@ -148,7 +141,7 @@ void main()
 
     if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
     {
-        vec3 colorEmissive = texture2D(emissiveRect, tc).rgb; 
+        vec3 colorEmissive = texture(emissiveRect, tc).rgb; 
         vec3 orm = spec.rgb;
         float perceptualRoughness = orm.g;
         float metallic = orm.b;
@@ -223,7 +216,7 @@ void main()
                                 
             if (nh > 0.0)
             {
-                float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
+                float scol = fres*texture(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
                 vec3 speccol = dlit*scol*spec.rgb*shadow;
                 speccol = clamp(speccol, vec3(0), vec3(1));
                 final_color += speccol;
diff --git a/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl
index 7724a6cac9..42ba96148c 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/pointLightF.glsl
@@ -23,15 +23,9 @@
  * $/LicenseInfo$
  */
  
-#extension GL_ARB_texture_rectangle : enable
-
 /*[EXTRA_CODE_HERE]*/
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
 
 uniform sampler2D diffuseRect;
 uniform sampler2D specularRect;
@@ -48,8 +42,8 @@ uniform vec3 color;
 uniform float falloff;
 uniform float size;
 
-VARYING vec4 vary_fragcoord;
-VARYING vec3 trans_center;
+in vec4 vary_fragcoord;
+in vec3 trans_center;
 
 uniform vec2 screen_res;
 
@@ -83,8 +77,8 @@ void main()
     vec3 n;
     vec4 norm = getNormalEnvIntensityFlags(tc, n, envIntensity); // need `norm.w` for GET_GBUFFER_FLAG()
 
-    vec3 diffuse = texture2D(diffuseRect, tc).rgb;
-    vec4 spec    = texture2D(specularRect, tc);
+    vec3 diffuse = texture(diffuseRect, tc).rgb;
+    vec4 spec    = texture(specularRect, tc);
 
     // Common half vectors calcs
     vec3  lv = trans_center.xyz-pos;
@@ -101,7 +95,7 @@ void main()
 
     if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
     {
-        vec3 colorEmissive = texture2D(emissiveRect, tc).rgb; 
+        vec3 colorEmissive = texture(emissiveRect, tc).rgb; 
         vec3 orm = spec.rgb;
         float perceptualRoughness = orm.g;
         float metallic = orm.b;
@@ -141,7 +135,7 @@ void main()
 
             if (nh > 0.0)
             {
-                float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
+                float scol = fres*texture(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
                 final_color += lit*scol*color.rgb*spec.rgb;
             }
         }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/pointLightV.glsl b/indra/newview/app_settings/shaders/class3/deferred/pointLightV.glsl
index d42c8f6cf6..8d23f1b427 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/pointLightV.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/pointLightV.glsl
@@ -26,13 +26,13 @@
 uniform mat4 modelview_projection_matrix;
 uniform mat4 modelview_matrix;
 
-ATTRIBUTE vec3 position;
+in vec3 position;
 
 uniform vec3 center;
 uniform float size;
 
-VARYING vec4 vary_fragcoord;
-VARYING vec3 trans_center;
+out vec4 vary_fragcoord;
+out vec3 trans_center;
 
 void main()
 {
diff --git a/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostF.glsl b/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostF.glsl
index 8043a78a82..dbf20fe2d8 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostF.glsl
@@ -23,15 +23,9 @@
  * $/LicenseInfo$
  */
 
-#extension GL_ARB_texture_rectangle : enable
-
 /*[EXTRA_CODE_HERE]*/
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
 
 uniform vec2 screen_res;
 uniform mat4 projection_matrix;
@@ -39,8 +33,8 @@ uniform mat4 inv_proj;
 uniform float zNear;
 uniform float zFar;
 
-VARYING vec2 vary_fragcoord;
-VARYING vec3 camera_ray;
+in vec2 vary_fragcoord;
+in vec3 camera_ray;
 
 uniform sampler2D specularRect;
 uniform sampler2D diffuseRect;
@@ -67,10 +61,10 @@ void main()
     vec3 n;
     vec4 norm = getNormalEnvIntensityFlags(tc, n, envIntensity); // need `norm.w` for GET_GBUFFER_FLAG()
     vec3 pos = getPositionWithDepth(tc, getDepth(tc)).xyz;
-    vec4 spec    = texture2D(specularRect, tc);
+    vec4 spec    = texture(specularRect, tc);
     vec2 hitpixel;
     
-    vec4 diffuse = texture2D(diffuseRect, tc);
+    vec4 diffuse = texture(diffuseRect, tc);
     vec3 specCol = spec.rgb;
 
     vec4 fcol = texture(diffuseMap, tc);
diff --git a/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostV.glsl b/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostV.glsl
index b084094d4d..f7e7268cc3 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostV.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/screenSpaceReflPostV.glsl
@@ -26,12 +26,12 @@
 uniform mat4 projection_matrix;
 uniform mat4 inv_proj;
 
-ATTRIBUTE vec3 position;
+in vec3 position;
 
 uniform vec2 screen_res;
 
-VARYING vec2 vary_fragcoord;
-VARYING vec3 camera_ray;
+out vec2 vary_fragcoord;
+out vec3 camera_ray;
 
 
 void main()
diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
index a8d61afeca..2f3efaa94a 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -23,19 +23,12 @@
  * $/LicenseInfo$
  */
 
-#extension GL_ARB_texture_rectangle : enable
-#extension GL_ARB_shader_texture_lod : enable
-
 #define FLT_MAX 3.402823466e+38
 
 #define REFMAP_COUNT 256
 #define REF_SAMPLE_COUNT 64 //maximum number of samples to consider
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
 
 uniform sampler2D diffuseRect;
 uniform sampler2D specularRect;
@@ -60,7 +53,7 @@ uniform mat3 env_mat;
 uniform vec3 sun_dir;
 uniform vec3 moon_dir;
 uniform int  sun_up_factor;
-VARYING vec2 vary_fragcoord;
+in vec2 vary_fragcoord;
 
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
@@ -127,16 +120,16 @@ void main()
     vec2  tc           = vary_fragcoord.xy;
     float depth        = getDepth(tc.xy);
     vec4  pos          = getPositionWithDepth(tc, depth);
-    vec4  norm         = texture2D(normalMap, tc);
+    vec4  norm         = texture(normalMap, tc);
     float envIntensity = norm.z;
     norm.xyz           = getNorm(tc);
     vec3  light_dir   = (sun_up_factor == 1) ? sun_dir : moon_dir;
 
-    vec4 baseColor     = texture2D(diffuseRect, tc);
-    vec4 spec        = texture2D(specularRect, vary_fragcoord.xy); // NOTE: PBR linear Emissive
+    vec4 baseColor     = texture(diffuseRect, tc);
+    vec4 spec        = texture(specularRect, vary_fragcoord.xy); // NOTE: PBR linear Emissive
 
 #if defined(HAS_SUN_SHADOW) || defined(HAS_SSAO)
-    vec2 scol_ambocc = texture2D(lightMap, vary_fragcoord.xy).rg;
+    vec2 scol_ambocc = texture(lightMap, vary_fragcoord.xy).rg;
 #endif
 
 #if defined(HAS_SUN_SHADOW)
@@ -180,12 +173,12 @@ void main()
 
     if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
     {
-        vec3 orm = texture2D(specularRect, tc).rgb; 
+        vec3 orm = texture(specularRect, tc).rgb; 
         float perceptualRoughness = orm.g;
         float metallic = orm.b;
         float ao = orm.r * ambocc;
 
-        vec3 colorEmissive = texture2D(emissiveRect, tc).rgb;
+        vec3 colorEmissive = texture(emissiveRect, tc).rgb;
         // PBR IBL
         float gloss      = 1.0 - perceptualRoughness;
         
@@ -211,7 +204,7 @@ void main()
     else if (!GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_ATMOS))
     {
         //should only be true of WL sky, just port over base color value
-        color = texture2D(emissiveRect, tc).rgb;
+        color = texture(emissiveRect, tc).rgb;
         color = srgb_to_linear(color);
         if (sun_up_factor > 0)
         {
@@ -263,7 +256,7 @@ void main()
                 float gtdenom = 2 * nh;
                 float gt = max(0,(min(gtdenom * nv / vh, gtdenom * nl / vh)));
 
-                scol *= fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
+                scol *= fres*texture(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
                 color.rgb += lit*scol*sunlit_linear.rgb*spec.rgb;
             }
 
diff --git a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
index f2ab585716..1ea801d7d7 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
@@ -23,9 +23,6 @@
  * $/LicenseInfo$
  */
  
-#extension GL_ARB_texture_rectangle : enable
-#extension GL_ARB_shader_texture_lod : enable
-
 /*[EXTRA_CODE_HERE]*/
 
 #define DEBUG_ANY_LIGHT_TYPE         0 // Output green light cone
@@ -38,11 +35,7 @@
 #define DEBUG_SPOT_NL                  0 // monochome area effected by light
 #define DEBUG_SPOT_ZERO                0 // Output zero for spotlight
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
 
 uniform sampler2D diffuseRect;
 uniform sampler2D specularRect;
@@ -75,8 +68,8 @@ uniform float size;
 uniform vec3 color;
 uniform float falloff;
 
-VARYING vec3 trans_center;
-VARYING vec4 vary_fragcoord;
+in vec3 trans_center;
+in vec4 vary_fragcoord;
 uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
@@ -126,7 +119,7 @@ void main()
 
     if (proj_shadow_idx >= 0)
     {
-        vec4 shd = texture2D(lightMap, tc);
+        vec4 shd = texture(lightMap, tc);
         shadow = (proj_shadow_idx == 0) ? shd.b : shd.a;
         shadow += shadow_fade;
         shadow = clamp(shadow, 0.0, 1.0);
@@ -147,15 +140,15 @@ void main()
     float nh, nl, nv, vh, lightDist;
     calcHalfVectors(lv, n, v, h, l, nh, nl, nv, vh, lightDist);
 
-    vec3 diffuse = texture2D(diffuseRect, tc).rgb;
-    vec4 spec    = texture2D(specularRect, tc);
+    vec3 diffuse = texture(diffuseRect, tc).rgb;
+    vec4 spec    = texture(specularRect, tc);
     vec3 dlit    = vec3(0, 0, 0);
     vec3 slit    = vec3(0, 0, 0);
 
     vec3 amb_rgb = vec3(0);
     if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
     {
-        vec3 colorEmissive = texture2D(emissiveRect, tc).rgb;
+        vec3 colorEmissive = texture(emissiveRect, tc).rgb;
         vec3 orm = spec.rgb; 
         float perceptualRoughness = orm.g;
         float metallic = orm.b;
@@ -231,7 +224,7 @@ void main()
 
             if (nh > 0.0)
             {
-                float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
+                float scol = fres*texture(lightFunc, vec2(nh, spec.a)).r*gt/(nh*nl);
                 vec3 speccol = dlit*scol*spec.rgb*shadow;
                 speccol = clamp(speccol, vec3(0), vec3(1));
                 final_color += speccol;