};
/**
- * Add the specified cubic bezier point to the current path.
+ * Starts a new path at the specified point.
*
* @param {Number} x The X coordinate of the point to draw.
* @param {Number} y The Y coordinate of the point to draw.
+ */
+ this.moveTo = function(x, y) {
+ scheduleTask(function() {
+
+ // Start a new path if current path is closed
+ if (pathClosed) {
+ displayContext.beginPath();
+ pathClosed = false;
+ }
+
+ if (layer.autosize != 0) fitRect(x, y, 0, 0);
+ displayContext.moveTo(x, y);
+
+ });
+ };
+
+ /**
+ * Add the specified line to the current path.
+ *
+ * @param {Number} x The X coordinate of the endpoint of the line to draw.
+ * @param {Number} y The Y coordinate of the endpoint of the line to draw.
+ */
+ this.lineTo = function(x, y) {
+ scheduleTask(function() {
+
+ // Start a new path if current path is closed
+ if (pathClosed) {
+ displayContext.beginPath();
+ pathClosed = false;
+ }
+
+ if (layer.autosize != 0) fitRect(x, y, 0, 0);
+ displayContext.lineTo(x, y);
+
+ });
+ };
+
+ /**
+ * Add the specified arc to the current path. Drawing direction is
+ * determined by the start and end angles. To draw clockwise, ensure
+ * the end angle is greater than the start angle. To draw counterclockwise,
+ * ensure the end angle is less than the start angle.
+ *
+ * @param {Number} x The X coordinate of the center of the circle which
+ * will contain the arc.
+ * @param {Number} y The Y coordinate of the center of the circle which
+ * will contain the arc.
+ * @param {Number} radius The radius of the circle.
+ * @param {Number} startAngle The starting angle of the arc, in radians.
+ * @param {Number} endAngle The ending angle of the arc, in radians.
+ */
+ this.arc = function(x, y, radius, startAngle, endAngle) {
+ scheduleTask(function() {
+
+ // Start a new path if current path is closed
+ if (pathClosed) {
+ displayContext.beginPath();
+ pathClosed = false;
+ }
+
+ if (layer.autosize != 0) fitRect(x, y, 0, 0);
+ displayContext.arc(x, y, radius, startAngle, endAngle, endAngle < startAngle);
+
+ });
+ };
+
+ /**
+ * Starts a new path at the specified point.
+ *
* @param {Number} cp1x The X coordinate of the first control point.
* @param {Number} cp1y The Y coordinate of the first control point.
* @param {Number} cp2x The X coordinate of the second control point.
* @param {Number} cp2y The Y coordinate of the second control point.
+ * @param {Number} x The X coordinate of the endpoint of the curve.
+ * @param {Number} y The Y coordinate of the endpoint of the curve.
*/
- this.path = function(x, y, cp1x, cp1y, cp2x, cp2y) {
+ this.curveTo = function(cp1x, cp1y, cp2x, cp2y, x, y) {
scheduleTask(function() {
// Start a new path if current path is closed
}
if (layer.autosize != 0) fitRect(x, y, 0, 0);
- displayContext.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, y);
+ displayContext.bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y);
+
+ });
+ };
+
+ /**
+ * Closes the current path by connecting the end point with the start
+ * point (if any) with a straight line.
+ */
+ this.close = function() {
+ scheduleTask(function() {
+
+ // Close path
+ displayContext.closePath();
+ pathClosed = true;
});
};
};
/**
- * Applies the given affine transform (defined with three values from the
+ * Sets the given affine transform (defined with six values from the
+ * transform's matrix).
+ *
+ * @param {Number} a The first value in the affine transform's matrix.
+ * @param {Number} b The second value in the affine transform's matrix.
+ * @param {Number} c The third value in the affine transform's matrix.
+ * @param {Number} d The fourth value in the affine transform's matrix.
+ * @param {Number} e The fifth value in the affine transform's matrix.
+ * @param {Number} f The sixth value in the affine transform's matrix.
+ */
+ this.setTransform = function(a, b, c, d, e, f) {
+ scheduleTask(function() {
+
+ // Set transform
+ displayContext.setTransform(
+ a, b, c,
+ d, e, f
+ /*0, 0, 1*/
+ );
+
+ });
+ };
+
+
+ /**
+ * Applies the given affine transform (defined with six values from the
* transform's matrix).
*
* @param {Number} a The first value in the affine transform's matrix.
this.transform = function(a, b, c, d, e, f) {
scheduleTask(function() {
- // Clear transform
+ // Apply transform
displayContext.transform(
a, b, c,
d, e, f