From 36d9fa90150d30a0a0851cc0da87531014c1d93d Mon Sep 17 00:00:00 2001
From: Ptolemy <ptolemy@lindenlab.com>
Date: Tue, 21 Jun 2022 16:31:35 -0700
Subject: SL-17274: Add view_dir uniform

---
 .../newview/app_settings/shaders/class3/deferred/softenLightF.glsl  | 4 +++-
 indra/newview/pipeline.cpp                                          | 6 ++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

(limited to 'indra/newview')

diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
index 61757882bb..4dd5c88211 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -1,5 +1,5 @@
 /**
- * @file class2/deferred/softenLightF.glsl
+ * @file class3/deferred/softenLightF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -85,6 +85,8 @@ vec3 srgb_to_linear(vec3 c);
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
+uniform vec3 view_dir; // PBR
+
 void main()
 {
     vec2  tc           = vary_fragcoord.xy;
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index 028a0db95c..1981f48500 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -8596,6 +8596,12 @@ void LLPipeline::renderDeferredLighting(LLRenderTarget *screen_target)
             soften_shader.uniform1i(LLShaderMgr::SUN_UP_FACTOR, environment.getIsSunUp() ? 1 : 0);
             soften_shader.uniform4fv(LLShaderMgr::LIGHTNORM, 1, environment.getClampedLightNorm().mV);
 
+            if(LLPipeline::sRenderPBR)
+            {
+                LLVector3 cameraAtAxis = LLViewerCamera::getInstance()->getAtAxis();
+                soften_shader.uniform3fv(LLShaderMgr::DEFERRED_VIEW_DIR, 1, cameraAtAxis.mV);
+            }
+
             {
                 LLGLDepthTest depth(GL_FALSE);
                 LLGLDisable   blend(GL_BLEND);
-- 
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