#3184 Fix for crash on some GPUs when setting quality to High or higher (#3201)

Author: RunitaiLinden

indra/llrender/llgl.cpp

@@ -1259,6 +1259,7 @@ bool LLGLManager::initGL()
     glGetIntegerv(GL_MAX_INTEGER_SAMPLES, &mMaxIntegerSamples);
     glGetIntegerv(GL_MAX_SAMPLE_MASK_WORDS, &mMaxSampleMaskWords);
     glGetIntegerv(GL_MAX_SAMPLES, &mMaxSamples);
+    glGetIntegerv(GL_MAX_VARYING_VECTORS, &mMaxVaryingVectors);
     glGetIntegerv(GL_MAX_UNIFORM_BLOCK_SIZE, &mMaxUniformBlockSize);
 
     // sanity clamp max uniform block size to 64k just in case

indra/llrender/llgl.h

@@ -88,6 +88,7 @@ class LLGLManager
     S32 mGLMaxTextureSize;
     F32 mMaxAnisotropy = 0.f;
     S32 mMaxUniformBlockSize = 0;
+    S32 mMaxVaryingVectors = 0;
 
     // GL 4.x capabilities
     bool mHasCubeMapArray = false;

indra/newview/featuretable.txt

@@ -1,4 +1,4 @@
-version 72
+version 73
 // The version number above should be incremented IF AND ONLY IF some
 // change has been made that is sufficiently important to justify
 // resetting the graphics preferences of all users to the recommended
@@ -428,3 +428,7 @@ RenderVintageMode           1   1
 
 list TexUnit16orLess
 RenderTerrainPBRDetail      1   -1
+
+list VaryingVectors16orLess
+RenderTerrainPBRPlanarSampleCount 1   1
+

indra/newview/featuretable_mac.txt

@@ -1,4 +1,4 @@
-version 66
+version 67
 // The version number above should be incremented IF AND ONLY IF some
 // change has been made that is sufficiently important to justify
 // resetting the graphics preferences of all users to the recommended
@@ -426,3 +426,7 @@ RenderReflectionProbeDetail	0	0
 RenderReflectionsEnabled    0   0
 RenderMirrors				0	0
 RenderVintageMode           1   1
+
+list VaryingVectors16orLess
+RenderTerrainPBRPlanarSampleCount 1   1
+

indra/newview/llfeaturemanager.cpp

@@ -721,6 +721,10 @@ void LLFeatureManager::applyBaseMasks()
         // Make extra sure that vintage mode also gets enabled.
         gSavedSettings.setBOOL("RenderVintageMode", true);
     }
+    if (gGLManager.mMaxVaryingVectors <= 16)
+    {
+        maskFeatures("VaryingVectors16orLess");
+    }
 
     // now mask by gpu string
     // Replaces ' ' with '_' in mGPUString to deal with inability for parser to handle spaces