From 6578144b7eda1dae885e5cc172751203b1d16c2d Mon Sep 17 00:00:00 2001
From: Merov Linden <merov@lindenlab.com>
Date: Wed, 18 Dec 2013 15:55:13 -0800
Subject: ACME-1236 : WIP : Added Gray Scale as an experimental filter in
 Flickr. Lots of ugly hacks for now

---
 indra/llimage/llimage.cpp | 20 ++++++++++++++++++++
 indra/llimage/llimage.h   |  3 +++
 2 files changed, 23 insertions(+)

(limited to 'indra/llimage')

diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp
index c8a05e1fae..e5281feff0 100755
--- a/indra/llimage/llimage.cpp
+++ b/indra/llimage/llimage.cpp
@@ -933,6 +933,26 @@ BOOL LLImageRaw::scale( S32 new_width, S32 new_height, BOOL scale_image_data )
 	return TRUE ;
 }
 
+// *TODO : Implement real color transform
+// Merov : This is temporary code for testing... 
+void LLImageRaw::colorTransform()
+{
+	const S32 components = getComponents();
+	llassert( components >= 1 && components <= 4 );
+    
+	S32 pixels = getWidth() * getHeight();
+	U8* dst_data = getData();
+    llinfos << "Merov : Convert the image to Black and White!!! pixels = " << pixels << ", comp = " << components << llendl;
+	for( S32 i=0; i<pixels; i++ )
+	{
+        U8 gray = (U8)(((U32)(dst_data[0]) + (U32)(dst_data[1]) + (U32)(dst_data[2]))/3);
+		dst_data[0] = gray;
+		dst_data[1] = gray;
+		dst_data[2] = gray;
+		dst_data += components;
+	}
+}
+
 void LLImageRaw::copyLineScaled( U8* in, U8* out, S32 in_pixel_len, S32 out_pixel_len, S32 in_pixel_step, S32 out_pixel_step )
 {
 	const S32 components = getComponents();
diff --git a/indra/llimage/llimage.h b/indra/llimage/llimage.h
index 2277afc585..96c37f5436 100755
--- a/indra/llimage/llimage.h
+++ b/indra/llimage/llimage.h
@@ -255,6 +255,9 @@ public:
 
 	// Src and dst are same size.  Src has 4 components.  Dst has 3 components.
 	void compositeUnscaled4onto3( LLImageRaw* src );
+    
+    // Filter operations
+    void colorTransform();
 
 protected:
 	// Create an image from a local file (generally used in tools)
-- 
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