From cb96ab1a6fed15da0407d2aba5e9de566417088f Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Wed, 18 Jul 2012 15:49:47 -0500
Subject: MAINT-628 Fix for seams in high res snapshots when lighting and
 shadows is enabled.

---
 indra/newview/llviewerwindow.cpp | 55 +++++++++++++++++++++++++++++++++++-----
 1 file changed, 49 insertions(+), 6 deletions(-)

(limited to 'indra/newview/llviewerwindow.cpp')

diff --git a/indra/newview/llviewerwindow.cpp b/indra/newview/llviewerwindow.cpp
index 44e6d70546..ffaf881521 100755
--- a/indra/newview/llviewerwindow.cpp
+++ b/indra/newview/llviewerwindow.cpp
@@ -4236,14 +4236,48 @@ BOOL LLViewerWindow::rawSnapshot(LLImageRaw *raw, S32 image_width, S32 image_hei
 		image_height = llmin(image_height, window_height);
 	}
 
+	S32 original_width = 0;
+	S32 original_height = 0;
+	bool reset_deferred = false;
+
+	LLRenderTarget scratch_space;
+
 	F32 scale_factor = 1.0f ;
 	if (!keep_window_aspect || (image_width > window_width) || (image_height > window_height))
 	{	
-		// if image cropping or need to enlarge the scene, compute a scale_factor
-		F32 ratio = llmin( (F32)window_width / image_width , (F32)window_height / image_height) ;
-		snapshot_width  = (S32)(ratio * image_width) ;
-		snapshot_height = (S32)(ratio * image_height) ;
-		scale_factor = llmax(1.0f, 1.0f / ratio) ;
+		if ((image_width > window_width || image_height > window_height) && LLPipeline::sRenderDeferred && !show_ui)
+		{
+			if (scratch_space.allocate(image_width, image_height, GL_RGBA, true, true))
+			{
+				original_width = gPipeline.mDeferredScreen.getWidth();
+				original_height = gPipeline.mDeferredScreen.getHeight();
+
+				if (gPipeline.allocateScreenBuffer(image_width, image_height))
+				{
+					window_width = image_width;
+					window_height = image_height;
+					snapshot_width = image_width;
+					snapshot_height = image_height;
+					reset_deferred = true;
+					mWorldViewRectRaw.set(0, image_height, image_width, 0);
+					scratch_space.bindTarget();
+				}
+				else
+				{
+					scratch_space.release();
+					gPipeline.allocateScreenBuffer(original_width, original_height);
+				}
+			}
+		}
+
+		if (!reset_deferred)
+		{
+			// if image cropping or need to enlarge the scene, compute a scale_factor
+			F32 ratio = llmin( (F32)window_width / image_width , (F32)window_height / image_height) ;
+			snapshot_width  = (S32)(ratio * image_width) ;
+			snapshot_height = (S32)(ratio * image_height) ;
+			scale_factor = llmax(1.0f, 1.0f / ratio) ;
+		}
 	}
 	
 	if (show_ui && scale_factor > 1.f)
@@ -4432,11 +4466,20 @@ BOOL LLViewerWindow::rawSnapshot(LLImageRaw *raw, S32 image_width, S32 image_hei
 		gPipeline.resetDrawOrders();
 	}
 
+	if (reset_deferred)
+	{
+		mWorldViewRectRaw = window_rect;
+		scratch_space.flush();
+		scratch_space.release();
+		gPipeline.allocateScreenBuffer(original_width, original_height);
+		
+	}
+
 	if (high_res)
 	{
 		send_agent_resume();
 	}
-
+	
 	return ret;
 }
 
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