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Add fixes for q and t quadratic curves and add support for consequtive t curves

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Will McNeilly 2012-07-26 11:05:53 +01:00 committed by David Rice
parent 956d8708ed
commit 1ba26ad05f
1 changed files with 50 additions and 18 deletions
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68
src/path.class.js
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@ -367,43 +367,75 @@
break;
case 'q': // quadraticCurveTo, relative
x += current[3];
y += current[4];
// transform to absolute x,y
tempX = x + current[3];
tempY = y + current[4];
controlX = x + current[1];
controlY = y + current[2];
ctx.quadraticCurveTo(
current[1] + l,
current[2] + t,
x + l,
y + t
controlX + l,
controlY + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'Q': // quadraticCurveTo, absolute
x = current[3];
y = current[4];
tempX = current[3];
tempY = current[4];
ctx.quadraticCurveTo(
current[1] + l,
current[2] + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
controlX = current[1];
controlY = current[2];
break;
case 't': // shorthand quadraticCurveTo, relative
// transform to absolute x,y
tempX = x + current[1];
tempY = y + current[2];
// calculate reflection of previous control points
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
x + l,
y + t
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
controlX = x + current[1];
controlY = y + current[2];
break;
case 'T':
tempX = x;
tempY = y;
x = current[1];
y = current[2];
tempX = current[1];
tempY = current[2];
// calculate reflection of previous control points
controlX = -controlX + 2 * tempX;
controlY = -controlY + 2 * tempY;
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
x + l,
y + t
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'a':