2 files changed, 138 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainF.glsl
new file mode 100644
index 0000000000..96903aeba8
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainF.glsl
@@ -0,0 +1,61 @@
+/** 
+ * @file class1\deferred\terrainF.glsl
+ *
+ * $LicenseInfo:firstyear=2023&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2023, 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
+ * $/LicenseInfo$
+ */
+
+out vec4 frag_data[4];
+
+uniform sampler2D detail_0;
+uniform sampler2D detail_1;
+uniform sampler2D detail_2;
+uniform sampler2D detail_3;
+uniform sampler2D alpha_ramp;
+
+in vec3 pos;
+in vec3 vary_normal;
+in vec4 vary_texcoord0;
+in vec4 vary_texcoord1;
+
+vec2 encode_normal(vec3 n);
+
+void main()
+{
+    vec4 color0 = texture2D(detail_0, vary_texcoord0.xy);
+    vec4 color1 = texture2D(detail_1, vary_texcoord0.xy);
+    vec4 color2 = texture2D(detail_2, vary_texcoord0.xy);
+    vec4 color3 = texture2D(detail_3, vary_texcoord0.xy);
+
+    float alpha1 = texture2D(alpha_ramp, vary_texcoord0.zw).a;
+    float alpha2 = texture2D(alpha_ramp,vary_texcoord1.xy).a;
+    float alphaFinal = texture2D(alpha_ramp, vary_texcoord1.zw).a;
+    vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
+   
+    outColor.a = 0.0; // yes, downstream atmospherics 
+    
+    frag_data[0] = outColor;
+    frag_data[1] = vec4(0.0,0.0,0.0,-1.0);
+    vec3 nvn = normalize(vary_normal);
+    frag_data[2] = vec4(encode_normal(nvn.xyz), 0.0, GBUFFER_FLAG_HAS_ATMOS);
+    frag_data[3] = vec4(0);
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pbrterrainV.glsl b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainV.glsl
new file mode 100644
index 0000000000..e8747a1f6b
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/pbrterrainV.glsl
@@ -0,0 +1,77 @@
+/** 
+ * @file class1\environment\pbrterrainV.glsl
+ *
+ * $LicenseInfo:firstyear=2023&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2023, 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
+ * $/LicenseInfo$
+ */
+
+uniform mat3 normal_matrix;
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_projection_matrix;
+
+in vec3 position;
+in vec3 normal;
+in vec4 diffuse_color;
+in vec2 texcoord0;
+in vec2 texcoord1;
+
+out vec3 pos;
+out vec3 vary_normal;
+out vec4 vary_texcoord0;
+out vec4 vary_texcoord1;
+
+uniform vec4 object_plane_s;
+uniform vec4 object_plane_t;
+
+vec4 texgen_object(vec4  vpos, vec4 tc, mat4 mat, vec4 tp0, vec4 tp1)
+{
+    vec4 tcoord;
+    
+    tcoord.x = dot(vpos, tp0);
+    tcoord.y = dot(vpos, tp1);
+    tcoord.z = tc.z;
+    tcoord.w = tc.w;
+    
+    tcoord = mat * tcoord; 
+    
+    return tcoord; 
+}
+
+void main()
+{
+    //transform vertex
+    vec4 pre_pos = vec4(position.xyz, 1.0);
+    vec4 t_pos = modelview_projection_matrix * pre_pos;
+
+    gl_Position = t_pos;
+    pos = t_pos.xyz;
+
+    vary_normal = normalize(normal_matrix * normal);
+    
+    // Transform and pass tex coords
+    vary_texcoord0.xy = texgen_object(vec4(position, 1.0), vec4(texcoord0,0,1), texture_matrix0, object_plane_s, object_plane_t).xy;
+    
+    vec4 t = vec4(texcoord1,0,1);
+    
+    vary_texcoord0.zw = t.xy;
+    vary_texcoord1.xy = t.xy-vec2(2.0, 0.0);
+    vary_texcoord1.zw = t.xy-vec2(1.0, 0.0);
+}