#2482 Low end NVIDIA compatibility pass (#2486)

- Use GL_NVX_gpu_memory_info when available
- Disable transparent water on Mid+ and lower
- Adjust GPU benchmark to better tell the truth
- Texture bias tune up
- viewer-private/#277 - Report foreground_time in viewer stats

2 files changed, 13 insertions, 0 deletions

diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index 7959b3bb57..0afe78a30c 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -1038,6 +1038,7 @@ void LLGLManager::initWGL()
         GLH_EXT_NAME(wglGetGPUIDsAMD) = (PFNWGLGETGPUIDSAMDPROC)GLH_EXT_GET_PROC_ADDRESS("wglGetGPUIDsAMD");
         GLH_EXT_NAME(wglGetGPUInfoAMD) = (PFNWGLGETGPUINFOAMDPROC)GLH_EXT_GET_PROC_ADDRESS("wglGetGPUInfoAMD");
     }
+    mHasNVXGpuMemoryInfo = ExtensionExists("GL_NVX_gpu_memory_info", gGLHExts.mSysExts);
 
     if (ExtensionExists("WGL_EXT_swap_control", gGLHExts.mSysExts))
     {
@@ -1205,6 +1206,17 @@ bool LLGLManager::initGL()
             LL_WARNS("RenderInit") << "VRAM Detected (AMDAssociations):" << mVRAM << LL_ENDL;
         }
     }
+    else if (mHasNVXGpuMemoryInfo)
+    {
+        GLint mem_kb = 0;
+        glGetIntegerv(GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &mem_kb);
+        mVRAM = mem_kb / 1024;
+
+        if (mVRAM != 0)
+        {
+            LL_WARNS("RenderInit") << "VRAM Detected (NVXGpuMemoryInfo):" << mVRAM << LL_ENDL;
+        }
+    }
 #endif
 
 #if LL_WINDOWS
diff --git a/indra/llrender/llgl.h b/indra/llrender/llgl.h
index be1c0a532a..cd1ba55b16 100644
--- a/indra/llrender/llgl.h
+++ b/indra/llrender/llgl.h
@@ -97,6 +97,7 @@ public:
 
     // Vendor-specific extensions
     bool mHasAMDAssociations = false;
+    bool mHasNVXGpuMemoryInfo = false;
 
     bool mIsAMD;
     bool mIsNVIDIA;