From 57c373259fb22a6c20248ef338dc2766a364ac59 Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Fri, 27 Apr 2012 15:38:17 -0700
Subject: scale the brush stroke according to the input width and height

Fixes: 1444 Brush: Unable to scale brushstroke using the Transform handles
---
 js/lib/geom/brush-stroke.js | 62 ++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 58 insertions(+), 4 deletions(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/brush-stroke.js b/js/lib/geom/brush-stroke.js
index 1fae0c1d..d5d9a893 100755
--- a/js/lib/geom/brush-stroke.js
+++ b/js/lib/geom/brush-stroke.js
@@ -264,13 +264,67 @@ var BrushStroke = function GLBrushStroke() {
         this._strokeStyle = s;
     };
 
-    this.setWidth = function () {
+    this.setWidth = function (newW) {
+        if (newW<1) {
+            newW=1; //clamp minimum width to 1
+        }
+
+        //scale the contents of this subpath to lie within this width
+        //determine the scale factor by comparing with the old width
+        var oldWidth = this._BBoxMax[0]-this._BBoxMin[0];
+        if (oldWidth<1) {
+            oldWidth=1;
+        }
+
+        var scaleX = newW/oldWidth;
+        if (scaleX===1) {
+            return; //no need to do anything
+        }
+
+        //scale the local point positions such that the width of the bbox is the newW
+        var origX = this._BBoxMin[0];
+        var numPoints = this._LocalPoints.length;
+        for (var i=0;i<numPoints;i++){
+            //compute the distance from the bboxMin
+            var oldW = this._LocalPoints[i][0] - origX;
+            this._LocalPoints[i] = [(origX + oldW*scaleX),this._LocalPoints[i][1],this._LocalPoints[i][2]];
+
+            oldW = this._OrigLocalPoints[i][0] - origX;
+            this._OrigLocalPoints[i] = [(origX + oldW*scaleX),this._OrigLocalPoints[i][1],this._OrigLocalPoints[i][2]];
+        }
+        this._isDirty = true;
+    };
 
-    };//NO-OP for now
+    this.setHeight = function (newH) {
+        if (newH<1) {
+            newH=1; //clamp minimum width to 1
+        }
 
-    this.setHeight = function () {
+        //scale the contents of this subpath to lie within this height
+        //determine the scale factor by comparing with the old height
+        var oldHeight = this._BBoxMax[1]-this._BBoxMin[1];
+        if (oldHeight<1) {
+            oldHeight=1;
+        }
+
+        var scaleY = newH/oldHeight;
+        if (scaleY===1) {
+            return; //no need to do anything
+        }
 
-    };//NO-OP for now
+        //scale the local point positions such that the width of the bbox is the newW
+        var origY = this._BBoxMin[1];
+        var numPoints = this._LocalPoints.length;
+        for (var i=0;i<numPoints;i++){
+            //compute the distance from the bboxMin
+            var oldH = this._LocalPoints[i][1] - origY;
+            this._LocalPoints[i] = [this._LocalPoints[i][0],(origY + oldH*scaleY),this._LocalPoints[i][2]];
+
+            oldH = this._OrigLocalPoints[i][1] - origY;
+            this._OrigLocalPoints[i] = [this._OrigLocalPoints[i][0],(origY + oldH*scaleY),this._OrigLocalPoints[i][2]];
+        }
+        this._isDirty = true;
+    };
 
     this.getWidth = function() {
         if (this._isDirty){
-- 
cgit v1.2.3


From f32420d51258f1caf048ac387985ee84f019604c Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Tue, 1 May 2012 09:06:34 -0700
Subject: prevent alpha values from accumulating over 1 due to rounding...fixes
 1443 Brush: Odd painting behavior when Hardness is 99%. A solid outline is
 shown on the brushstroke.

---
 js/lib/geom/brush-stroke.js | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/brush-stroke.js b/js/lib/geom/brush-stroke.js
index d5d9a893..27d12f03 100755
--- a/js/lib/geom/brush-stroke.js
+++ b/js/lib/geom/brush-stroke.js
@@ -704,7 +704,7 @@ var BrushStroke = function GLBrushStroke() {
             ctx.lineCap = "round";
             ctx.lineJoin="round";
             var minStrokeWidth = (this._strokeHardness*this._strokeWidth)/100; //the hardness is the percentage of the stroke width that's fully opaque
-            var numlayers = 1 + (this._strokeWidth-minStrokeWidth)/2;
+            var numlayers = 1 + Math.ceil((this._strokeWidth-minStrokeWidth)*0.5);
             var alphaVal = 1.0/(numlayers); //this way the alpha at the first path will be 1
             ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")";
             for (var l=0;l<numlayers;l++){
@@ -732,6 +732,16 @@ var BrushStroke = function GLBrushStroke() {
                     ctx.lineTo(p[0],p[1]);
                 }
                 ctx.lineWidth=2*l+minStrokeWidth;
+
+
+                //experiments with shadows
+                /*
+                ctx.shadowOffsetX = 10;
+                ctx.shadowOffsetY = 10;
+                ctx.shadowBlur    = 10;
+                ctx.shadowColor   = //"rgb("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+")";
+                    "#FF6666";  //or use rgb(red, green, blue)
+                 */
                 ctx.stroke();
             }//for every layer l
         } //if there is no calligraphic stroke
-- 
cgit v1.2.3


From 14e101e3822da595baaaaeaf91e9a00c79ac4b38 Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Tue, 1 May 2012 10:21:36 -0700
Subject: Fixed 1436 Brush: Calligraphic brushstroke is slightly thicker than
 the round tip brushstroke

---
 js/lib/geom/brush-stroke.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/brush-stroke.js b/js/lib/geom/brush-stroke.js
index 27d12f03..574cead1 100755
--- a/js/lib/geom/brush-stroke.js
+++ b/js/lib/geom/brush-stroke.js
@@ -657,11 +657,8 @@ var BrushStroke = function GLBrushStroke() {
             ctx.lineCap="butt";
             ctx.globalCompositeOperation = 'source-over';
             ctx.globalAlpha = this._strokeColor[3];
-            //todo figure out the correct formula for the line width
-            ctx.lineWidth=2;
-            if (t===numTraces-1){
-                ctx.lineWidth = 1;
-            }
+
+
             for (t=0;t<numTraces;t++){
                 var disp = [brushStamp[t][0], brushStamp[t][1]];
                 var alphaVal = 1.0;
@@ -671,6 +668,12 @@ var BrushStroke = function GLBrushStroke() {
                     alphaVal *= 1.0/ctx.lineWidth; //factor that accounts for lineWidth !== 1
                 }
                 ctx.save();
+                if (t === (numTraces-1)){
+                    ctx.lineWidth = 1;
+                } else {
+                     //todo figure out the correct formula for the line width
+                    ctx.lineWidth=2;
+                }
                 ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")";
                 //linearly interpolate between the two stroke colors
                 var currStrokeColor = VecUtils.vecInterpolate(4, this._strokeColor, this._secondStrokeColor, t/numTraces);
-- 
cgit v1.2.3


From 42b0fe45cded043f2c210f263a3eb2ba2dbd09c2 Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Tue, 1 May 2012 15:10:14 -0700
Subject: small code changes (mostly re-org)

---
 js/lib/geom/brush-stroke.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/brush-stroke.js b/js/lib/geom/brush-stroke.js
index 574cead1..a1746d95 100755
--- a/js/lib/geom/brush-stroke.js
+++ b/js/lib/geom/brush-stroke.js
@@ -637,7 +637,7 @@ var BrushStroke = function GLBrushStroke() {
             //build the stamp for the brush stroke
             var t=0;
             var numTraces = this._strokeWidth;
-            var halfNumTraces = numTraces/2;
+            var halfNumTraces = numTraces*0.5;
             var opaqueRegionHalfWidth = 0.5*this._strokeHardness*numTraces*0.01; //the 0.01 is to convert the strokeHardness from [0,100] to [0,1]
             var maxTransparentRegionHalfWidth = halfNumTraces-opaqueRegionHalfWidth;
 
@@ -658,21 +658,21 @@ var BrushStroke = function GLBrushStroke() {
             ctx.globalCompositeOperation = 'source-over';
             ctx.globalAlpha = this._strokeColor[3];
 
-
             for (t=0;t<numTraces;t++){
                 var disp = [brushStamp[t][0], brushStamp[t][1]];
                 var alphaVal = 1.0;
                 var distFromOpaqueRegion = Math.abs(t-halfNumTraces) - opaqueRegionHalfWidth;
                 if (distFromOpaqueRegion>0) {
-                    alphaVal = 1.0 - distFromOpaqueRegion/maxTransparentRegionHalfWidth;
-                    alphaVal *= 1.0/ctx.lineWidth; //factor that accounts for lineWidth !== 1
+                    var transparencyFactor = distFromOpaqueRegion/maxTransparentRegionHalfWidth;
+                    alphaVal = 1.0 - transparencyFactor;//(transparencyFactor*transparencyFactor);//the square term produces nonlinearly varying alpha values
                 }
                 ctx.save();
-                if (t === (numTraces-1)){
+                if (t === (numTraces-1) || t === 0){
                     ctx.lineWidth = 1;
                 } else {
                      //todo figure out the correct formula for the line width
                     ctx.lineWidth=2;
+                    alphaVal *= 0.5; //factor that accounts for lineWidth == 2
                 }
                 ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")";
                 //linearly interpolate between the two stroke colors
-- 
cgit v1.2.3


From b9262c831952e77135b79c2de7c455d5e7ff0589 Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Tue, 1 May 2012 17:00:40 -0700
Subject: undo some previous change that was halving the alpha value of the
 stroke

---
 js/lib/geom/brush-stroke.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/brush-stroke.js b/js/lib/geom/brush-stroke.js
index a1746d95..519e0433 100755
--- a/js/lib/geom/brush-stroke.js
+++ b/js/lib/geom/brush-stroke.js
@@ -665,6 +665,7 @@ var BrushStroke = function GLBrushStroke() {
                 if (distFromOpaqueRegion>0) {
                     var transparencyFactor = distFromOpaqueRegion/maxTransparentRegionHalfWidth;
                     alphaVal = 1.0 - transparencyFactor;//(transparencyFactor*transparencyFactor);//the square term produces nonlinearly varying alpha values
+                    alphaVal *= 0.5; //factor that accounts for lineWidth == 2
                 }
                 ctx.save();
                 if (t === (numTraces-1) || t === 0){
@@ -672,7 +673,6 @@ var BrushStroke = function GLBrushStroke() {
                 } else {
                      //todo figure out the correct formula for the line width
                     ctx.lineWidth=2;
-                    alphaVal *= 0.5; //factor that accounts for lineWidth == 2
                 }
                 ctx.strokeStyle="rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+alphaVal+")";
                 //linearly interpolate between the two stroke colors
-- 
cgit v1.2.3


From de9f718b739ef2b31a161d9dac6e81d614fab853 Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Fri, 11 May 2012 08:55:07 -0700
Subject: code cleanup and starting the subtool functionality

---
 js/lib/geom/sub-path.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/sub-path.js b/js/lib/geom/sub-path.js
index 56c94df3..24acb2b0 100755
--- a/js/lib/geom/sub-path.js
+++ b/js/lib/geom/sub-path.js
@@ -166,6 +166,8 @@ var GLSubpath = function GLSubpath() {
     };
 
     this.setWidth = function (newW) {
+        var strokeWidth = this._strokeWidth;
+        var halfStrokeWidth = strokeWidth*0.5;
         if (newW<1) {
             newW=1; //clamp minimum width to 1
         }
@@ -183,7 +185,7 @@ var GLSubpath = function GLSubpath() {
         }
 
         //scale the anchor point positions such that the width of the bbox is the newW
-        var origX = this._BBoxMin[0];
+        var origX = this._BBoxMin[0]; //this should always be zero since we only deal with local coordinates
         var numAnchors = this._Anchors.length;
         for (var i=0;i<numAnchors;i++){
             //compute the distance from the bboxMin
@@ -196,6 +198,7 @@ var GLSubpath = function GLSubpath() {
             this._Anchors[i].setNextPos(origX + nextW*scaleX,this._Anchors[i].getNextY(),this._Anchors[i].getNextZ());
         }
         this.makeDirty();
+        this.computeBoundingBox(true, false);
     };
 
     this.setHeight = function (newH) {
-- 
cgit v1.2.3


From 75a862d305bc4502e22bc5aa65fa271143b8cf6c Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Thu, 31 May 2012 12:18:43 -0700
Subject: move all the subpath functions to its prototype, and first version of
 the pen path runtime

---
 js/lib/geom/sub-path.js | 311 ++++++++++++++++++++++++------------------------
 1 file changed, 156 insertions(+), 155 deletions(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/sub-path.js b/js/lib/geom/sub-path.js
index a9034def..db115655 100755
--- a/js/lib/geom/sub-path.js
+++ b/js/lib/geom/sub-path.js
@@ -68,178 +68,179 @@ var GLSubpath = function GLSubpath() {
     this._selectedAnchorIndex = -1;
 
     this._SAMPLING_EPSILON = 0.5; //epsilon used for sampling the curve
+}; //function GLSubpath ...class definition
 
-    // (current GeomObj complains if buildBuffers/render is added to GLSubpath prototype)
-    //buildBuffers
-    //  Build the stroke vertices, normals, textures and colors
-    //  Add that array data to the GPU using OpenGL data binding
-    this.buildBuffers = function () {
-        // return; //no need to do anything for now
-    };
-
-    //render
-    //  specify how to render the subpath in Canvas2D
-    this.render = function () {
-        // get the world
-        var world = this.getWorld();
-        if (!world)  throw( "null world in subpath render" );
-        if (!this._canvas){
-            //set the canvas by querying the world
-            this._canvas = this.getWorld().getCanvas();
-        }
-        // get the context
-        var ctx = world.get2DContext();
-        if (!ctx)  throw ("null context in subpath render");
-
-        var numAnchors = this.getNumAnchors();
-        if (numAnchors === 0) {
-            return; //nothing to do for empty paths
-        }
-        this.createSamples(false); //dirty bit checked in this function...will generate a polyline representation
+GLSubpath.prototype = Object.create(GeomObj, {});
 
-        var numPoints = this._Samples.length;
-        if (numPoints === 0){
-            return; //nothing to do for empty paths
-        }
-        
-        //figure the size of the area we will draw into
-        var bboxWidth=0, bboxHeight=0;
-        bboxWidth = this._BBoxMax[0] - this._BBoxMin[0];
-        bboxHeight = this._BBoxMax[1] - this._BBoxMin[1];
-
-        ctx.save();
-        ctx.clearRect(0, 0, bboxWidth, bboxHeight);
-
-        ctx.lineWidth = this._strokeWidth;
-        ctx.strokeStyle = "black";
-        if (this._strokeColor) {
-            //ctx.strokeStyle = MathUtils.colorToHex( this._strokeColor );
-            var strokeColorStr = "rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+this._strokeColor[3]+")";
-            ctx.strokeStyle = strokeColorStr;
-        }
+//buildBuffers
+GLSubpath.prototype.buildBuffers = function () {
+    //no need to do anything for now (no WebGL)
+};
 
-        ctx.fillStyle = "white";
-        if (this._fillColor){
-            //ctx.fillStyle = MathUtils.colorToHex( this._fillColor );
-            var fillColorStr = "rgba("+parseInt(255*this._fillColor[0])+","+parseInt(255*this._fillColor[1])+","+parseInt(255*this._fillColor[2])+","+this._fillColor[3]+")";
-            ctx.fillStyle = fillColorStr;
-        }
-        var lineCap = ['butt','round','square'];
-        ctx.lineCap = lineCap[1];
-        var lineJoin = ['round','bevel','miter'];
-        ctx.lineJoin = lineJoin[0];
-
-        /*
-        commenting this out for now because of Chrome bug where coincident endpoints of bezier curve cause the curve to not be rendered
-        ctx.beginPath();
-        var prevAnchor = this.getAnchor(0);
-        ctx.moveTo(prevAnchor.getPosX()-bboxMin[0],prevAnchor.getPosY()-bboxMin[1]);
-        for (var i = 1; i < numAnchors; i++) {
-            var currAnchor = this.getAnchor(i);
-            ctx.bezierCurveTo(prevAnchor.getNextX()-bboxMin[0],prevAnchor.getNextY()-bboxMin[1], currAnchor.getPrevX()-bboxMin[0], currAnchor.getPrevY()-bboxMin[1], currAnchor.getPosX()-bboxMin[0], currAnchor.getPosY()-bboxMin[1]);
-            prevAnchor = currAnchor;
-        }
-        if (this._isClosed === true) {
-            var currAnchor = this.getAnchor(0);
-            ctx.bezierCurveTo(prevAnchor.getNextX()-bboxMin[0],prevAnchor.getNextY()-bboxMin[1], currAnchor.getPrevX()-bboxMin[0], currAnchor.getPrevY()-bboxMin[1], currAnchor.getPosX()-bboxMin[0], currAnchor.getPosY()-bboxMin[1]);
-            prevAnchor = currAnchor;
-            ctx.fill();
-        }
-        */
+//render
+//  specify how to render the subpath in Canvas2D
+GLSubpath.prototype.render = function () {
+    // get the world
+    var world = this.getWorld();
+    if (!world)  throw( "null world in subpath render" );
+    if (!this._canvas){
+        //set the canvas by querying the world
+        this._canvas = this.getWorld().getCanvas();
+    }
+    // get the context
+    var ctx = world.get2DContext();
+    if (!ctx)  throw ("null context in subpath render");
 
+    var numAnchors = this.getNumAnchors();
+    if (numAnchors === 0) {
+        return; //nothing to do for empty paths
+    }
+    this.createSamples(false); //dirty bit checked in this function...will generate a polyline representation
 
-        ctx.beginPath();
-        ctx.moveTo(this._Samples[0][0],this._Samples[0][1]);
-        for (var i=0;i<numPoints;i++){
-            ctx.lineTo(this._Samples[i][0],this._Samples[i][1]);
-        }
-        if (this._isClosed === true) {
-            ctx.lineTo(this._Samples[0][0],this._Samples[0][1]);
-        }
-        ctx.fill();
-        ctx.stroke();
-        ctx.restore();
-    }; //render()
-
-    this.geomType = function () {
-        return this.GEOM_TYPE_CUBIC_BEZIER;
-    };
-
-    this.setWidth = function (newW) {
-        var strokeWidth = this._strokeWidth;
-        var halfStrokeWidth = strokeWidth*0.5;
-        if (newW<1) {
-            newW=1; //clamp minimum width to 1
-        }
+    var numPoints = this._Samples.length;
+    if (numPoints === 0){
+        return; //nothing to do for empty paths
+    }
 
-        //scale the contents of this subpath to lie within this width
-        //determine the scale factor by comparing with the old width
-        var oldWidth = this._BBoxMax[0]-this._BBoxMin[0];
-        if (oldWidth<1) {
-            oldWidth=1;
-        }
+    //figure the size of the area we will draw into
+    var bboxWidth=0, bboxHeight=0;
+    bboxWidth = this._BBoxMax[0] - this._BBoxMin[0];
+    bboxHeight = this._BBoxMax[1] - this._BBoxMin[1];
 
-        var scaleX = newW/oldWidth;
-        if (scaleX===1) {
-            return; //no need to do anything
-        }
+    ctx.save();
+    ctx.clearRect(0, 0, bboxWidth, bboxHeight);
 
-        //scale the anchor point positions such that the width of the bbox is the newW
-        var origX = this._BBoxMin[0]; //this should always be zero since we only deal with local coordinates
-        var numAnchors = this._Anchors.length;
-        for (var i=0;i<numAnchors;i++){
-            //compute the distance from the bboxMin
-            var oldW = this._Anchors[i].getPosX() - origX;
-            var prevW = this._Anchors[i].getPrevX() - origX;
-            var nextW = this._Anchors[i].getNextX() - origX;
-
-            this._Anchors[i].setPos(origX + oldW*scaleX,this._Anchors[i].getPosY(),this._Anchors[i].getPosZ());
-            this._Anchors[i].setPrevPos(origX + prevW*scaleX,this._Anchors[i].getPrevY(),this._Anchors[i].getPrevZ());
-            this._Anchors[i].setNextPos(origX + nextW*scaleX,this._Anchors[i].getNextY(),this._Anchors[i].getNextZ());
-        }
-        this.makeDirty();
-        this.computeBoundingBox(true, false);
-    };
+    ctx.lineWidth = this._strokeWidth;
+    ctx.strokeStyle = "black";
+    if (this._strokeColor) {
+        //ctx.strokeStyle = MathUtils.colorToHex( this._strokeColor );
+        var strokeColorStr = "rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+this._strokeColor[3]+")";
+        ctx.strokeStyle = strokeColorStr;
+    }
 
-    this.setHeight = function (newH) {
-        if (newH<1) {
-            newH=1; //clamp minimum width to 1
-        }
-        //scale the contents of this subpath to lie within this height
-        //determine the scale factor by comparing with the old height
-        var oldHeight = this._BBoxMax[1]-this._BBoxMin[1];
-        if (oldHeight<1){
-            oldHeight=1;
-        }
+    ctx.fillStyle = "white";
+    if (this._fillColor){
+        //ctx.fillStyle = MathUtils.colorToHex( this._fillColor );
+        var fillColorStr = "rgba("+parseInt(255*this._fillColor[0])+","+parseInt(255*this._fillColor[1])+","+parseInt(255*this._fillColor[2])+","+this._fillColor[3]+")";
+        ctx.fillStyle = fillColorStr;
+    }
+    var lineCap = ['butt','round','square'];
+    ctx.lineCap = lineCap[1];
+    var lineJoin = ['round','bevel','miter'];
+    ctx.lineJoin = lineJoin[0];
+
+
+    //commenting this out for now because of Chrome bug where coincident endpoints of bezier curve cause the curve to not be rendered
+    /*
+    ctx.beginPath();
+    var prevAnchor = this.getAnchor(0);
+    ctx.moveTo(prevAnchor.getPosX(),prevAnchor.getPosY());
+    for (var i = 1; i < numAnchors; i++) {
+        var currAnchor = this.getAnchor(i);
+        ctx.bezierCurveTo(prevAnchor.getNextX(),prevAnchor.getNextY(), currAnchor.getPrevX(), currAnchor.getPrevY(), currAnchor.getPosX(), currAnchor.getPosY());
+        prevAnchor = currAnchor;
+    }
+    if (this._isClosed === true) {
+        var currAnchor = this.getAnchor(0);
+        ctx.bezierCurveTo(prevAnchor.getNextX(),prevAnchor.getNextY(), currAnchor.getPrevX(), currAnchor.getPrevY(), currAnchor.getPosX(), currAnchor.getPosY());
+        prevAnchor = currAnchor;
+    }
+    ctx.fill();
+    ctx.stroke();
+    */
 
-        var scaleY = newH/oldHeight;
-        if (scaleY===1){
-            return; //no need to do anything
-        }
 
-        //scale the anchor point positions such that the height of the bbox is the newH
-        var origY = this._BBoxMin[1];
-        var numAnchors = this._Anchors.length;
-        for (var i=0;i<numAnchors;i++){
-            //compute the distance from the bboxMin
-            var oldW = this._Anchors[i].getPosY() - origY;
-            var prevW = this._Anchors[i].getPrevY() - origY;
-            var nextW = this._Anchors[i].getNextY() - origY;
-
-            this._Anchors[i].setPos(this._Anchors[i].getPosX(), origY + oldW*scaleY,this._Anchors[i].getPosZ());
-            this._Anchors[i].setPrevPos(this._Anchors[i].getPrevX(), origY + prevW*scaleY,this._Anchors[i].getPrevZ());
-            this._Anchors[i].setNextPos(this._Anchors[i].getNextX(), origY + nextW*scaleY,this._Anchors[i].getNextZ());
-        }
-        this.makeDirty();
+    ctx.beginPath();
+    ctx.moveTo(this._Samples[0][0],this._Samples[0][1]);
+    for (var i=0;i<numPoints;i++){
+        ctx.lineTo(this._Samples[i][0],this._Samples[i][1]);
     }
+    if (this._isClosed === true) {
+        ctx.lineTo(this._Samples[0][0],this._Samples[0][1]);
+    }
+    ctx.fill();
+    ctx.stroke();
 
-}; //function GLSubpath ...class definition
-
-GLSubpath.prototype = Object.create(GeomObj, {});
+    ctx.restore();
+}; //render()
 
 /////////////////////////////////////////////////////////
 // Property Accessors/Setters
 /////////////////////////////////////////////////////////
+
+
+GLSubpath.prototype.geomType = function () {
+    return this.GEOM_TYPE_CUBIC_BEZIER;
+};
+
+GLSubpath.prototype.setWidth = function (newW) {
+    var strokeWidth = this._strokeWidth;
+    var halfStrokeWidth = strokeWidth*0.5;
+    if (newW<1) {
+        newW=1; //clamp minimum width to 1
+    }
+
+    //scale the contents of this subpath to lie within this width
+    //determine the scale factor by comparing with the old width
+    var oldWidth = this._BBoxMax[0]-this._BBoxMin[0];
+    if (oldWidth<1) {
+        oldWidth=1;
+    }
+
+    var scaleX = newW/oldWidth;
+    if (scaleX===1) {
+        return; //no need to do anything
+    }
+
+    //scale the anchor point positions such that the width of the bbox is the newW
+    var origX = this._BBoxMin[0]; //this should always be zero since we only deal with local coordinates
+    var numAnchors = this._Anchors.length;
+    for (var i=0;i<numAnchors;i++){
+        //compute the distance from the bboxMin
+        var oldW = this._Anchors[i].getPosX() - origX;
+        var prevW = this._Anchors[i].getPrevX() - origX;
+        var nextW = this._Anchors[i].getNextX() - origX;
+
+        this._Anchors[i].setPos(origX + oldW*scaleX,this._Anchors[i].getPosY(),this._Anchors[i].getPosZ());
+        this._Anchors[i].setPrevPos(origX + prevW*scaleX,this._Anchors[i].getPrevY(),this._Anchors[i].getPrevZ());
+        this._Anchors[i].setNextPos(origX + nextW*scaleX,this._Anchors[i].getNextY(),this._Anchors[i].getNextZ());
+    }
+    this.makeDirty();
+    this.computeBoundingBox(true, false);
+};
+
+GLSubpath.prototype.setHeight = function (newH) {
+    if (newH<1) {
+        newH=1; //clamp minimum width to 1
+    }
+    //scale the contents of this subpath to lie within this height
+    //determine the scale factor by comparing with the old height
+    var oldHeight = this._BBoxMax[1]-this._BBoxMin[1];
+    if (oldHeight<1){
+        oldHeight=1;
+    }
+
+    var scaleY = newH/oldHeight;
+    if (scaleY===1){
+        return; //no need to do anything
+    }
+
+    //scale the anchor point positions such that the height of the bbox is the newH
+    var origY = this._BBoxMin[1];
+    var numAnchors = this._Anchors.length;
+    for (var i=0;i<numAnchors;i++){
+        //compute the distance from the bboxMin
+        var oldW = this._Anchors[i].getPosY() - origY;
+        var prevW = this._Anchors[i].getPrevY() - origY;
+        var nextW = this._Anchors[i].getNextY() - origY;
+
+        this._Anchors[i].setPos(this._Anchors[i].getPosX(), origY + oldW*scaleY,this._Anchors[i].getPosZ());
+        this._Anchors[i].setPrevPos(this._Anchors[i].getPrevX(), origY + prevW*scaleY,this._Anchors[i].getPrevZ());
+        this._Anchors[i].setNextPos(this._Anchors[i].getNextX(), origY + nextW*scaleY,this._Anchors[i].getNextZ());
+    }
+    this.makeDirty();
+};
+
 GLSubpath.prototype.setWorld = function (world) {
     this._world = world;
 };
-- 
cgit v1.2.3


From 0dd045b574a27233a452e87ca8ce3d65d725bbfe Mon Sep 17 00:00:00 2001
From: Pushkar Joshi
Date: Tue, 5 Jun 2012 09:40:59 -0700
Subject: enable gradients for pen stroke and fill

---
 js/lib/geom/sub-path.js | 43 +++++++++++++++++++++++++++++++++++++------
 1 file changed, 37 insertions(+), 6 deletions(-)

(limited to 'js/lib')

diff --git a/js/lib/geom/sub-path.js b/js/lib/geom/sub-path.js
index db115655..f765b715 100755
--- a/js/lib/geom/sub-path.js
+++ b/js/lib/geom/sub-path.js
@@ -77,6 +77,37 @@ GLSubpath.prototype.buildBuffers = function () {
     //no need to do anything for now (no WebGL)
 };
 
+//buildColor returns the fillStyle or strokeStyle for the Canvas 2D context
+GLSubpath.prototype.buildColor = function(ctx,          //the 2D rendering context (for creating gradients if necessary)
+                                          ipColor,      //color string, also encodes whether there's a gradient and of what type
+                                          w,            //width of the region of color
+                                          h,            //height of the region of color
+                                          lw)           //linewidth (i.e. stroke width/size)
+{
+    if (ipColor.gradientMode){
+        var position, gradient, cs, inset; //vars used in gradient calculations
+        inset = Math.ceil( lw ) - 0.5;
+
+        if(ipColor.gradientMode === "radial") {
+            var ww = w - 2*lw,  hh = h - 2*lw;
+            gradient = ctx.createRadialGradient(w/2, h/2, 0, w/2, h/2, Math.max(ww, hh)/2);
+        } else {
+            gradient = ctx.createLinearGradient(inset, h/2, w-inset, h/2);
+        }
+        var colors = ipColor.color;
+
+        var 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 + ")");
+        }
+        return gradient;
+    } else {
+        var c = "rgba(" + 255*ipColor[0] + "," + 255*ipColor[1] + "," + 255*ipColor[2] + "," + ipColor[3] + ")";
+        return c;
+    }
+};
 //render
 //  specify how to render the subpath in Canvas2D
 GLSubpath.prototype.render = function () {
@@ -112,17 +143,17 @@ GLSubpath.prototype.render = function () {
 
     ctx.lineWidth = this._strokeWidth;
     ctx.strokeStyle = "black";
+
+    //vars used for the gradient computation in buildColor
+    var w = world.getViewportWidth(), h = world.getViewportHeight();
+
     if (this._strokeColor) {
-        //ctx.strokeStyle = MathUtils.colorToHex( this._strokeColor );
-        var strokeColorStr = "rgba("+parseInt(255*this._strokeColor[0])+","+parseInt(255*this._strokeColor[1])+","+parseInt(255*this._strokeColor[2])+","+this._strokeColor[3]+")";
-        ctx.strokeStyle = strokeColorStr;
+        ctx.strokeStyle = this.buildColor(ctx, this._strokeColor, w,h, this._strokeWidth);
     }
 
     ctx.fillStyle = "white";
     if (this._fillColor){
-        //ctx.fillStyle = MathUtils.colorToHex( this._fillColor );
-        var fillColorStr = "rgba("+parseInt(255*this._fillColor[0])+","+parseInt(255*this._fillColor[1])+","+parseInt(255*this._fillColor[2])+","+this._fillColor[3]+")";
-        ctx.fillStyle = fillColorStr;
+        ctx.fillStyle = this.buildColor(ctx, this._fillColor, w, h, this._strokeWidth);
     }
     var lineCap = ['butt','round','square'];
     ctx.lineCap = lineCap[1];
-- 
cgit v1.2.3