SL-16841 Disable shadow splits one by one to improve FPS instead of disabling all shadows at once

3 files changed, 36 insertions, 7 deletions

diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 184ee8daff..43e554e532 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -9049,6 +9049,17 @@
     <key>Value</key>
     <real>0.5</real>
   </map>
+  <key>RenderShadowSplits</key>
+  <map>
+    <key>Comment</key>
+    <string>Amount of shadow map splits to render (0 - 3).</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>S32</string>
+    <key>Value</key>
+    <integer>3</integer>
+  </map>
   <key>RenderSSAOScale</key>
   <map>
     <key>Comment</key>
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index c895c8a227..d3936fabcf 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -150,6 +150,7 @@ U32 LLPipeline::RenderFSAASamples;
 U32 LLPipeline::RenderResolutionDivisor;
 bool LLPipeline::RenderUIBuffer;
 S32 LLPipeline::RenderShadowDetail;
+S32 LLPipeline::RenderShadowSplits;
 bool LLPipeline::RenderDeferredSSAO;
 F32 LLPipeline::RenderShadowResolutionScale;
 bool LLPipeline::RenderLocalLights;
@@ -544,6 +545,7 @@ void LLPipeline::init()
 	connectRefreshCachedSettingsSafe("RenderResolutionDivisor");
 	connectRefreshCachedSettingsSafe("RenderUIBuffer");
 	connectRefreshCachedSettingsSafe("RenderShadowDetail");
+    connectRefreshCachedSettingsSafe("RenderShadowSplits");
 	connectRefreshCachedSettingsSafe("RenderDeferredSSAO");
 	connectRefreshCachedSettingsSafe("RenderShadowResolutionScale");
 	connectRefreshCachedSettingsSafe("RenderLocalLights");
@@ -611,6 +613,7 @@ void LLPipeline::init()
 	connectRefreshCachedSettingsSafe("CameraDoFResScale");
 	connectRefreshCachedSettingsSafe("RenderAutoHideSurfaceAreaLimit");
 	gSavedSettings.getControl("RenderAutoHideSurfaceAreaLimit")->getCommitSignal()->connect(boost::bind(&LLPipeline::refreshCachedSettings));
+    gSavedSettings.getControl("AutoFPS")->getCommitSignal()->connect(boost::bind(&LLPipeline::onToggleAutoFPS));
 }
 
 LLPipeline::~LLPipeline()
@@ -1073,6 +1076,7 @@ void LLPipeline::refreshCachedSettings()
 	RenderResolutionDivisor = gSavedSettings.getU32("RenderResolutionDivisor");
 	RenderUIBuffer = gSavedSettings.getBOOL("RenderUIBuffer");
 	RenderShadowDetail = gSavedSettings.getS32("RenderShadowDetail");
+    RenderShadowSplits = gSavedSettings.getS32("RenderShadowSplits");
 	RenderDeferredSSAO = gSavedSettings.getBOOL("RenderDeferredSSAO");
 	RenderShadowResolutionScale = gSavedSettings.getF32("RenderShadowResolutionScale");
 	RenderLocalLights = gSavedSettings.getBOOL("RenderLocalLights");
@@ -10270,7 +10274,8 @@ void LLPipeline::generateSunShadow(LLCamera& camera)
 
 			std::vector<LLVector3> fp;
 
-			if (!gPipeline.getVisiblePointCloud(shadow_cam, min, max, fp, lightDir))
+			if (!gPipeline.getVisiblePointCloud(shadow_cam, min, max, fp, lightDir)
+                || j > RenderShadowSplits)
 			{
 				//no possible shadow receivers
 				if (!gPipeline.hasRenderDebugMask(LLPipeline::RENDER_DEBUG_SHADOW_FRUSTA))
@@ -11505,10 +11510,10 @@ void LLPipeline::autoAdjustSettings()
             {
                 S32 fps_dif = fps_lower_boundary - fps;
                 
-                if (LLPipeline::sRenderDeferred && RenderShadowDetail > 0)
+                if (LLPipeline::sRenderDeferred && RenderShadowDetail > 0 && RenderShadowSplits > 0)
                 {
-                    S32 shadow_detail = RenderShadowDetail - 1;
-                    gSavedSettings.setS32("RenderShadowDetail", shadow_detail);
+                    S32 shadow_splits = llclamp(RenderShadowSplits - 1, 0, 3);
+                    gSavedSettings.setS32("RenderShadowSplits", shadow_splits);
                     return;
                 }
                 
@@ -11542,10 +11547,10 @@ void LLPipeline::autoAdjustSettings()
                     update_far_clip(fps_dif);
                 }
 
-                if (LLPipeline::sRenderDeferred && RenderShadowDetail < 2)
+                if (LLPipeline::sRenderDeferred && RenderShadowDetail > 0 && RenderShadowSplits < 3)
                 {
-                    S32 shadow_detail = RenderShadowDetail + 1;
-                    gSavedSettings.setS32("RenderShadowDetail", shadow_detail);
+                    S32 shadow_splits = llclamp(RenderShadowSplits + 1, 0, 3);
+                    gSavedSettings.setS32("RenderShadowSplits", shadow_splits);
                 }
             }
         }
@@ -11561,3 +11566,13 @@ void LLPipeline::setAdjustmentTimerExpiry(F32 expiration)
 {
     mUpdateTimer->setTimerExpirySec(expiration);
 }
+
+void LLPipeline::onToggleAutoFPS()
+{
+    if (!gSavedSettings.getBOOL("AutoFPS"))
+    {
+        //reset the number of shadow map splits rendered, when disabling auto-fps
+        //probably should be removed, if we'll have actual UI control for this setting
+        gSavedSettings.setS32("RenderShadowSplits", 3);
+    }
+}
diff --git a/indra/newview/pipeline.h b/indra/newview/pipeline.h
index 3e5899d973..b86b68b09d 100644
--- a/indra/newview/pipeline.h
+++ b/indra/newview/pipeline.h
@@ -416,6 +416,8 @@ public:
 	static void updateRenderDeferred();
 	static void refreshCachedSettings();
 
+    static void onToggleAutoFPS();
+
 	void addDebugBlip(const LLVector3& position, const LLColor4& color);
 
 	void hidePermanentObjects( std::vector<U32>& restoreList );
@@ -916,6 +918,7 @@ public:
 	static U32 RenderResolutionDivisor;
 	static bool RenderUIBuffer;
 	static S32 RenderShadowDetail;
+    static S32 RenderShadowSplits;
 	static bool RenderDeferredSSAO;
 	static F32 RenderShadowResolutionScale;
 	static bool RenderLocalLights;