4 files changed, 34 insertions, 0 deletions
diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index d1eb4c8be0..d5f0b81830 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -314,6 +314,7 @@ LLGLManager::LLGLManager() :
 
 	mHasMultitexture(FALSE),
 	mHasATIMemInfo(FALSE),
+	mHasNVXMemInfo(FALSE),
 	mNumTextureUnits(1),
 	mHasMipMapGeneration(FALSE),
 	mHasCompressedTextures(FALSE),
@@ -505,6 +506,12 @@ bool LLGLManager::initGL()
 
 		mVRAM = meminfo[0]/1024;
 	}
+	else if (mHasNVXMemInfo)
+	{
+		S32 dedicated_memory;
+		glGetIntegerv(GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &dedicated_memory);
+		mVRAM = dedicated_memory/1024;
+	}
 
 	if (mHasMultitexture)
 	{
@@ -669,6 +676,7 @@ void LLGLManager::initExtensions()
 #else // LL_MESA_HEADLESS
 	mHasMultitexture = glh_init_extensions("GL_ARB_multitexture");
 	mHasATIMemInfo = ExtensionExists("GL_ATI_meminfo", gGLHExts.mSysExts);
+	mHasNVXMemInfo = ExtensionExists("GL_NVX_gpu_memory_info", gGLHExts.mSysExts);
 	mHasMipMapGeneration = glh_init_extensions("GL_SGIS_generate_mipmap");
 	mHasSeparateSpecularColor = glh_init_extensions("GL_EXT_separate_specular_color");
 	mHasAnisotropic = glh_init_extensions("GL_EXT_texture_filter_anisotropic");
diff --git a/indra/llrender/llgl.h b/indra/llrender/llgl.h
index f4be067f2e..0d7ba15b12 100644
--- a/indra/llrender/llgl.h
+++ b/indra/llrender/llgl.h
@@ -77,6 +77,7 @@ public:
 	// Extensions used by everyone
 	BOOL mHasMultitexture;
 	BOOL mHasATIMemInfo;
+	BOOL mHasNVXMemInfo;
 	S32	 mNumTextureUnits;
 	BOOL mHasMipMapGeneration;
 	BOOL mHasCompressedTextures;
diff --git a/indra/llrender/llglheaders.h b/indra/llrender/llglheaders.h
index 46bc282436..c48e2bb5fa 100644
--- a/indra/llrender/llglheaders.h
+++ b/indra/llrender/llglheaders.h
@@ -837,4 +837,22 @@ extern void glGetBufferPointervARB (GLenum, GLenum, GLvoid* *);
 #define GL_DEPTH_CLAMP 0x864F
 #endif
 
+//GL_NVX_gpu_memory_info constants
+#ifndef GL_NVX_gpu_memory_info
+#define GL_NVX_gpu_memory_info
+#define	GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX          0x9047
+#define	GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX    0x9048
+#define	GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX  0x9049
+#define	GL_GPU_MEMORY_INFO_EVICTION_COUNT_NVX            0x904A
+#define	GL_GPU_MEMORY_INFO_EVICTED_MEMORY_NVX            0x904B
+#endif
+
+//GL_ATI_meminfo constants
+#ifndef GL_ATI_meminfo
+#define GL_ATI_meminfo
+#define GL_VBO_FREE_MEMORY_ATI                     0x87FB
+#define GL_TEXTURE_FREE_MEMORY_ATI                 0x87FC
+#define GL_RENDERBUFFER_FREE_MEMORY_ATI            0x87FD
+#endif
+
 #endif // LL_LLGLHEADERS_H
diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index 093e94add0..f665f39e9c 100644
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -481,6 +481,13 @@ public:
 					ypos += y_inc;
 				}
 			}
+			else if (gGLManager.mHasNVXMemInfo)
+			{
+				S32 free_memory;
+				glGetIntegerv(GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &free_memory);
+				addText(xpos, ypos, llformat("%.2f MB Video Memory Free", free_memory/1024.f));
+				ypos += y_inc;
+			}
 
 			addText(xpos, ypos, llformat("%d MB Vertex Data", LLVertexBuffer::sAllocatedBytes/(1024*1024)));
 			ypos += y_inc;