Add debug setting and code to allow nVidia nSight graphics debugging to capture SL frames.

These changes are only enabled if RenderNsightDebugSupport is true and eliminate use of
some OpenGL legacy functionality which is incompatible with nSight capture
(mostly glReadPixels and other fixed-function pipe rendering calls).

1 files changed, 6 insertions, 1 deletions

diff --git a/indra/llappearance/lltexlayer.cpp b/indra/llappearance/lltexlayer.cpp
index 2cf86bb4fe..3f2fcce429 100644
--- a/indra/llappearance/lltexlayer.cpp
+++ b/indra/llappearance/lltexlayer.cpp
@@ -1577,7 +1577,12 @@ void LLTexLayer::renderMorphMasks(S32 x, S32 y, S32 width, S32 height, const LLC
 			}
 			alpha_data = new U8[width * height];
 			mAlphaCache[cache_index] = alpha_data;
-			glReadPixels(x, y, width, height, GL_ALPHA, GL_UNSIGNED_BYTE, alpha_data);
+    
+			// nSight doesn't support use of glReadPixels
+			if (!LLRender::sNsightDebugSupport)
+			{
+				glReadPixels(x, y, width, height, GL_ALPHA, GL_UNSIGNED_BYTE, alpha_data);
+			}
 		}
 		
 		getTexLayerSet()->getAvatarAppearance()->dirtyMesh();