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, 27 insertions, 23 deletions

diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index c057954606..e0309a4546 100644
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -731,7 +731,8 @@ public:
 			addText(xpos, ypos, "View Matrix");
 			ypos += y_inc;
 		}
-		if (gSavedSettings.getBOOL("DebugShowColor"))
+		// disable use of glReadPixels which messes up nVidia nSight graphics debugging
+		if (gSavedSettings.getBOOL("DebugShowColor") && !LLRender::sNsightDebugSupport)
 		{
 			U8 color[4];
 			LLCoordGL coord = gViewerWindow->getCurrentMouse();
@@ -4717,36 +4718,39 @@ BOOL LLViewerWindow::rawSnapshot(LLImageRaw *raw, S32 image_width, S32 image_hei
 					{
 						LLAppViewer::instance()->pingMainloopTimeout("LLViewerWindow::rawSnapshot");
 					}
-				
-					if (type == LLSnapshotModel::SNAPSHOT_TYPE_COLOR)
+					// disable use of glReadPixels when doing nVidia nSight graphics debugging
+					if (!LLRender::sNsightDebugSupport)
 					{
-						glReadPixels(
+						if (type == LLSnapshotModel::SNAPSHOT_TYPE_COLOR)
+						{
+							glReadPixels(
 									 subimage_x_offset, out_y + subimage_y_offset,
 									 read_width, 1,
 									 GL_RGB, GL_UNSIGNED_BYTE,
 									 raw->getData() + output_buffer_offset
 									 );
-					}
-					else // LLSnapshotModel::SNAPSHOT_TYPE_DEPTH
-					{
-						LLPointer<LLImageRaw> depth_line_buffer = new LLImageRaw(read_width, 1, sizeof(GL_FLOAT)); // need to store floating point values
-						glReadPixels(
-									 subimage_x_offset, out_y + subimage_y_offset,
-									 read_width, 1,
-									 GL_DEPTH_COMPONENT, GL_FLOAT,
-									 depth_line_buffer->getData()// current output pixel is beginning of buffer...
-									 );
-
-						for (S32 i = 0; i < (S32)read_width; i++)
+						}
+						else // LLSnapshotModel::SNAPSHOT_TYPE_DEPTH
 						{
-							F32 depth_float = *(F32*)(depth_line_buffer->getData() + (i * sizeof(F32)));
-					
-							F32 linear_depth_float = 1.f / (depth_conversion_factor_1 - (depth_float * depth_conversion_factor_2));
-							U8 depth_byte = F32_to_U8(linear_depth_float, LLViewerCamera::getInstance()->getNear(), LLViewerCamera::getInstance()->getFar());
-							// write converted scanline out to result image
-							for (S32 j = 0; j < raw->getComponents(); j++)
+							LLPointer<LLImageRaw> depth_line_buffer = new LLImageRaw(read_width, 1, sizeof(GL_FLOAT)); // need to store floating point values
+							glReadPixels(
+										 subimage_x_offset, out_y + subimage_y_offset,
+										 read_width, 1,
+										 GL_DEPTH_COMPONENT, GL_FLOAT,
+										 depth_line_buffer->getData()// current output pixel is beginning of buffer...
+										 );
+
+							for (S32 i = 0; i < (S32)read_width; i++)
 							{
-								*(raw->getData() + output_buffer_offset + (i * raw->getComponents()) + j) = depth_byte;
+								F32 depth_float = *(F32*)(depth_line_buffer->getData() + (i * sizeof(F32)));
+					
+								F32 linear_depth_float = 1.f / (depth_conversion_factor_1 - (depth_float * depth_conversion_factor_2));
+								U8 depth_byte = F32_to_U8(linear_depth_float, LLViewerCamera::getInstance()->getNear(), LLViewerCamera::getInstance()->getFar());
+								// write converted scanline out to result image
+								for (S32 j = 0; j < raw->getComponents(); j++)
+								{
+									*(raw->getData() + output_buffer_offset + (i * raw->getComponents()) + j) = depth_byte;
+								}
 							}
 						}
 					}