From b6288e1ffe4ffe29a595bb1e146feb388503e2c4 Mon Sep 17 00:00:00 2001
From: Nivesh Rajbhandari
Date: Wed, 7 Mar 2012 15:31:20 -0800
Subject: gradient support for canvas-2d shapes.

Signed-off-by: Nivesh Rajbhandari <mqg734@motorola.com>
---
 js/lib/geom/circle.js    | 61 ++++++++++++++++++++++++++++++++++++++++++------
 js/lib/geom/line.js      | 38 ++++++++++++++++++++++++++----
 js/lib/geom/rectangle.js |  4 ++--
 3 files changed, 90 insertions(+), 13 deletions(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/circle.js b/js/lib/geom/circle.js
index dd82a4cc..70f608be 100755
--- a/js/lib/geom/circle.js
+++ b/js/lib/geom/circle.js
@@ -442,16 +442,43 @@ var Circle = function GLCircle() {
 		var bezPts = MathUtils.circularArcToBezier( [0,0,0], [1,0,0], 2.0*Math.PI );
 		if (bezPts) {
 			var n = bezPts.length;
+            var gradient,
+                colors,
+                len,
+                j,
+                position,
+                cs,
+                c;
 
 			// set up the fill style
 			ctx.beginPath();
 			ctx.lineWidth = 0;
 			if (this._fillColor) {
-				var c = "rgba(" + 255*this._fillColor[0] + "," + 255*this._fillColor[1] + "," + 255*this._fillColor[2] + "," + this._fillColor[3] + ")";  
-				ctx.fillStyle = c;
-
+                if(this._fillColor.gradientMode) {
+                    if(this._fillColor.gradientMode === "radial") {
+                        gradient = ctx.createRadialGradient(xCtr, yCtr, 0,
+                                                            xCtr, yCtr, yScale);
+                    } else {
+                        gradient = ctx.createLinearGradient(0, this._height/2, this._width, this._height/2);
+                    }
+                    colors = this._fillColor.color;
+
+                    len = colors.length;
+
+                    for(j=0; j<len; j++) {
+                        position = colors[j].position/100;
+                        cs = colors[j].value;
+                        gradient.addColorStop(position, "rgba(" + cs.r + "," + cs.g + "," + cs.b + "," + cs.a + ")");
+                    }
+
+                    ctx.fillStyle = gradient;
+
+                } else {
+                    c = "rgba(" + 255*this._fillColor[0] + "," + 255*this._fillColor[1] + "," + 255*this._fillColor[2] + "," + this._fillColor[3] + ")";
+                    ctx.fillStyle = c;
+                }
 				// draw the fill
-				ctx.beginPath();
+//				ctx.beginPath();
 				var p = MathUtils.transformPoint( bezPts[0],   mat );
 				ctx.moveTo( p[0],  p[1] );
 				var index = 1;
@@ -504,9 +531,29 @@ var Circle = function GLCircle() {
 			ctx.beginPath();
 			ctx.lineWidth	= lineWidth;
 			if (this._strokeColor) {
-				var c = "rgba(" + 255*this._strokeColor[0] + "," + 255*this._strokeColor[1] + "," + 255*this._strokeColor[2] + "," + this._strokeColor[3] + ")";  
-				ctx.strokeStyle = c;
-			
+                if(this._strokeColor.gradientMode) {
+                    if(this._strokeColor.gradientMode === "radial") {
+                        gradient = ctx.createRadialGradient(xCtr, yCtr, yScale,
+                                                            xCtr, yCtr, 0.5*this._height);
+                    } else {
+                        gradient = ctx.createLinearGradient(0, this._height/2, this._width, this._height/2);
+                    }
+                    colors = this._strokeColor.color;
+
+                    len = colors.length;
+
+                    for(j=0; j<len; j++) {
+                        position = colors[j].position/100;
+                        cs = colors[j].value;
+                        gradient.addColorStop(position, "rgba(" + cs.r + "," + cs.g + "," + cs.b + "," + cs.a + ")");
+                    }
+
+                    ctx.strokeStyle = gradient;
+
+                } else {
+                    c = "rgba(" + 255*this._strokeColor[0] + "," + 255*this._strokeColor[1] + "," + 255*this._strokeColor[2] + "," + this._strokeColor[3] + ")";
+                    ctx.strokeStyle = c;
+                }
 				// draw the stroke
 				p = MathUtils.transformPoint( bezPts[0],   mat );
 				ctx.moveTo( p[0],  p[1] );
diff --git a/js/lib/geom/line.js b/js/lib/geom/line.js
index da63b21c..eaa26cf0 100755
--- a/js/lib/geom/line.js
+++ b/js/lib/geom/line.js
@@ -348,16 +348,46 @@ var Line = function GLLine( world, xOffset, yOffset, width, height, slope, strok
 		if (!ctx)  return;
 	
 		// set up the stroke style
-		var lineWidth = this._strokeWidth;
+		var lineWidth = this._strokeWidth,
+            w = this._width,
+            h = this._height;
+
+        var c,
+            gradient,
+            colors,
+            len,
+            n,
+            position,
+            cs;
+
 		ctx.beginPath();
 		ctx.lineWidth	= lineWidth;
 		if (this._strokeColor) {
-			var c = "rgba(" + 255*this._strokeColor[0] + "," + 255*this._strokeColor[1] + "," + 255*this._strokeColor[2] + "," + this._strokeColor[3] + ")";  
-			ctx.strokeStyle = c;
+            if(this._strokeColor.gradientMode) {
+                if(this._strokeColor.gradientMode === "radial") {
+                    gradient = ctx.createRadialGradient(w/2, h/2, 0, w/2, h/2, h/2);
+                } else {
+                    gradient = ctx.createLinearGradient(0, h/2, w, h/2);
+                }
+                colors = this._strokeColor.color;
+
+                len = colors.length;
+
+                for(n=0; n<len; n++) {
+                    position = colors[n].position/100;
+                    cs = colors[n].value;
+                    gradient.addColorStop(position, "rgba(" + cs.r + "," + cs.g + "," + cs.b + "," + cs.a + ")");
+                }
+
+                ctx.strokeStyle = gradient;
+
+            } else {
+                c = "rgba(" + 255*this._strokeColor[0] + "," + 255*this._strokeColor[1] + "," + 255*this._strokeColor[2] + "," + this._strokeColor[3] + ")";
+                ctx.strokeStyle = c;
+            }
 
 			// get the points
 			var p0,  p1;
-			var  w = this._width,  h = this._height;
 			if(this._slope === "vertical") {
 				p0 = [0.5*w, 0];
 				p1 = [0.5*w, h];
diff --git a/js/lib/geom/rectangle.js b/js/lib/geom/rectangle.js
index d01d5b28..f13f624d 100755
--- a/js/lib/geom/rectangle.js
+++ b/js/lib/geom/rectangle.js
@@ -475,7 +475,7 @@ var Rectangle = function GLRectangle() {
 
             if(this._fillColor.gradientMode) {
                 if(this._fillColor.gradientMode === "radial") {
-                    gradient = ctx.createRadialGradient(w/2, h/2, h/2-inset, w/2, h/2, h-2*inset);
+                    gradient = ctx.createRadialGradient(w/2, h/2, 0, w/2, h/2, h/2-inset);
                 } else {
                     gradient = ctx.createLinearGradient(inset, h/2, w-2*inset, h/2);
                 }
@@ -509,7 +509,7 @@ var Rectangle = function GLRectangle() {
 
             if(this._strokeColor.gradientMode) {
                 if(this._strokeColor.gradientMode === "radial") {
-                    gradient = ctx.createRadialGradient(w/2, h/2, h/2, w/2, h/2, h);
+                    gradient = ctx.createRadialGradient(w/2, h/2, h/2-inset, w/2, h/2, h/2);
                 } else {
                     gradient = ctx.createLinearGradient(0, h/2, w, h/2);
                 }
-- 
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