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#1 add support for rendering all colors with the same opacity #17

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#1 add support for rendering all colors with the same opacity #17

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10 changes: 10 additions & 0 deletions simpleheat.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@ function simpleheat(canvas) {
this._height = canvas.height;

this._max = 1;
this._fixedOpacity = null;
this._data = [];
}

Expand All @@ -37,6 +38,12 @@ simpleheat.prototype = {
return this;
},

// value between 0 and 255
fixedOpacity: function(fixedOpacity) {
this._fixedOpacity = fixedOpacity;
return this;
},

add: function (point) {
this._data.push(point);
return this;
Expand Down Expand Up @@ -126,6 +133,8 @@ simpleheat.prototype = {
pixels[i] = gradient[j];
pixels[i + 1] = gradient[j + 1];
pixels[i + 2] = gradient[j + 2];
if (this._fixedOpacity != null)
pixels[i + 3] = this._fixedOpacity;
}
}
},
Expand All @@ -140,3 +149,4 @@ simpleheat.prototype = {
}
}
};