From d74486f95cb7b2724e08794ff2e4903879c2389f Mon Sep 17 00:00:00 2001
From: "Alex A. Naanou" <alex.nanou@gmail.com>
Date: Sat, 26 Dec 2020 04:06:22 +0300
Subject: [PATCH] minor tweaking and notes...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
---
 Viewer/Makefile                         | 10 ++++-----
 Viewer/lib/components/ig-image-graph.js | 29 ++++++++++++++++---------
 2 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/Viewer/Makefile b/Viewer/Makefile
index 77993150..b964b1c7 100755
--- a/Viewer/Makefile
+++ b/Viewer/Makefile
@@ -603,11 +603,11 @@ $(BUILD_INFO): $(CSS_FILES) $(NODE_DIR) $(PROJECT_FILES) \
 		$(JS_FILES) $(CSS_FILES) $(HTML_FILES)
 	$(MD) "$(@D)"
 	@echo "Build info:"
-	@echo "$(APP_NAME)" | tee $(BUILD_INFO)
-	@echo "version: $(VERSION)" | tee -a $(BUILD_INFO)
-	@echo "date: $(DATE)" | tee -a $(BUILD_INFO)
-	@echo "commit: $(COMMIT)" | tee -a $(BUILD_INFO)
-	@echo "electron: $(ELECTRON_VERSION)" | tee -a $(BUILD_INFO)
+	@echo "$(APP_NAME)" | tee "$@"
+	@echo "version: $(VERSION)" | tee -a "$@"
+	@echo "date: $(DATE)" | tee -a "$@"
+	@echo "commit: $(COMMIT)" | tee -a "$@"
+	@echo "electron: $(ELECTRON_VERSION)" | tee -a "$@"
 
 
 %.css: %.less
diff --git a/Viewer/lib/components/ig-image-graph.js b/Viewer/lib/components/ig-image-graph.js
index b32586cb..de03443c 100644
--- a/Viewer/lib/components/ig-image-graph.js
+++ b/Viewer/lib/components/ig-image-graph.js
@@ -171,22 +171,32 @@ module.Filters = {
 			offsetTop + 255 + offsetBottom)
 
 		// pixel hit buffer...
+		// XXX make this an ArrayBuffer(..)
 		var count = []
 
 		var od = out.data
 		var d = pixels.data
 
+		// calculate dot position...
+		//
+		// horizontal position offset...
+		var _hp = w*4
+		// top margin...
+		var _tm = offsetTop*_tm
 		var pos = function(i, value){
-			return (
-				// top margin...
-				offsetTop*w*4 
+			return (_tm,
 				// horixontal position...
-				+ i%(w*4)
+				+ i%(_hp)
 				// value vertical offset...
-				+ (255-Math.round(value))*w*4) }
+				+ (255-Math.round(value))*_hp) }
 
 		var gain = 100
 
+		// CIE luminance for RGB
+		var Rl = 0.2126
+		var Gl = 0.7152
+		var Bl = 0.0722
+
 		for(var i=0; i<d.length; i+=4){
 
 			var r = d[i]
@@ -196,15 +206,14 @@ module.Filters = {
 
 
 			if(mode == 'luminance'){
-				// CIE luminance for RGB
-				var v = 0.2126*r + 0.7152*g + 0.0722*b
+				var v = Rl*r + Gl*g + Bl*b
 				c = count[j = pos(i, v)] = (count[j] || 0) + m
 				od[j] = od[j+1] = od[j+2] = c * gain
 
 			} else {
 
 				if(mode == 'color' || mode == 'R'){
-					f = 0.2126
+					f = Rl
 					x = 1
 					y = 2
 					j = pos(i, r)
@@ -212,7 +221,7 @@ module.Filters = {
 					od[j] = c * gain }
 
 				if(mode == 'color' || mode == 'G'){
-					f = 0.7152
+					f = Gl
 					x = -1
 					y = 1
 					j = pos(i, g) + 1
@@ -220,7 +229,7 @@ module.Filters = {
 					od[j] = c * gain }
 
 				if(mode == 'color' || mode == 'B'){
-					f = 0.0722
+					f = Bl
 					x = -2
 					y = -1
 					j = pos(i, b) + 2