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803 lines
28 KiB
803 lines
28 KiB
// Adds JS functions to augment the CanvasKit interface.
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// For example, if there is a wrapper around the C++ call or logic to allow
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// chaining, it should go here.
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(function(CanvasKit) {
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// CanvasKit.onRuntimeInitialized is called after the WASM library has loaded.
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// Anything that modifies an exposed class (e.g. SkPath) should be set
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// after onRuntimeInitialized, otherwise, it can happen outside of that scope.
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CanvasKit.onRuntimeInitialized = function() {
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// All calls to 'this' need to go in externs.js so closure doesn't minify them away.
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// Add some helpers for matrices. This is ported from SkMatrix.cpp
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// to save complexity and overhead of going back and forth between
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// C++ and JS layers.
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// I would have liked to use something like DOMMatrix, except it
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// isn't widely supported (would need polyfills) and it doesn't
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// have a mapPoints() function (which could maybe be tacked on here).
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// If DOMMatrix catches on, it would be worth re-considering this usage.
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CanvasKit.SkMatrix = {};
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function sdot(a, b, c, d, e, f) {
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e = e || 0;
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f = f || 0;
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return a * b + c * d + e * f;
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}
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CanvasKit.SkMatrix.identity = function() {
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return [
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1, 0, 0,
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0, 1, 0,
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0, 0, 1,
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];
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};
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// Return the inverse (if it exists) of this matrix.
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// Otherwise, return the identity.
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CanvasKit.SkMatrix.invert = function(m) {
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var det = m[0]*m[4]*m[8] + m[1]*m[5]*m[6] + m[2]*m[3]*m[7]
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- m[2]*m[4]*m[6] - m[1]*m[3]*m[8] - m[0]*m[5]*m[7];
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if (!det) {
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SkDebug('Warning, uninvertible matrix');
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return CanvasKit.SkMatrix.identity();
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}
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return [
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(m[4]*m[8] - m[5]*m[7])/det, (m[2]*m[7] - m[1]*m[8])/det, (m[1]*m[5] - m[2]*m[4])/det,
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(m[5]*m[6] - m[3]*m[8])/det, (m[0]*m[8] - m[2]*m[6])/det, (m[2]*m[3] - m[0]*m[5])/det,
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(m[3]*m[7] - m[4]*m[6])/det, (m[1]*m[6] - m[0]*m[7])/det, (m[0]*m[4] - m[1]*m[3])/det,
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];
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};
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// Maps the given points according to the passed in matrix.
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// Results are done in place.
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// See SkMatrix.h::mapPoints for the docs on the math.
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CanvasKit.SkMatrix.mapPoints = function(matrix, ptArr) {
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if (ptArr.length % 2) {
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throw 'mapPoints requires an even length arr';
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}
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for (var i = 0; i < ptArr.length; i+=2) {
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var x = ptArr[i], y = ptArr[i+1];
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// Gx+Hy+I
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var denom = matrix[6]*x + matrix[7]*y + matrix[8];
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// Ax+By+C
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var xTrans = matrix[0]*x + matrix[1]*y + matrix[2];
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// Dx+Ey+F
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var yTrans = matrix[3]*x + matrix[4]*y + matrix[5];
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ptArr[i] = xTrans/denom;
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ptArr[i+1] = yTrans/denom;
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}
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return ptArr;
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};
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CanvasKit.SkMatrix.multiply = function(m1, m2) {
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var result = [0,0,0, 0,0,0, 0,0,0];
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for (var r = 0; r < 3; r++) {
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for (var c = 0; c < 3; c++) {
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// m1 and m2 are 1D arrays pretending to be 2D arrays
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result[3*r + c] = sdot(m1[3*r + 0], m2[3*0 + c],
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m1[3*r + 1], m2[3*1 + c],
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m1[3*r + 2], m2[3*2 + c]);
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}
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}
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return result;
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}
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// Return a matrix representing a rotation by n radians.
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// px, py optionally say which point the rotation should be around
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// with the default being (0, 0);
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CanvasKit.SkMatrix.rotated = function(radians, px, py) {
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px = px || 0;
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py = py || 0;
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var sinV = Math.sin(radians);
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var cosV = Math.cos(radians);
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return [
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cosV, -sinV, sdot( sinV, py, 1 - cosV, px),
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sinV, cosV, sdot(-sinV, px, 1 - cosV, py),
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0, 0, 1,
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];
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};
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CanvasKit.SkMatrix.scaled = function(sx, sy, px, py) {
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px = px || 0;
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py = py || 0;
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return [
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sx, 0, px - sx * px,
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0, sy, py - sy * py,
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0, 0, 1,
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];
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};
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CanvasKit.SkMatrix.skewed = function(kx, ky, px, py) {
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px = px || 0;
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py = py || 0;
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return [
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1, kx, -kx * px,
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ky, 1, -ky * py,
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0, 0, 1,
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];
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};
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CanvasKit.SkMatrix.translated = function(dx, dy) {
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return [
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1, 0, dx,
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0, 1, dy,
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0, 0, 1,
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];
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};
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CanvasKit.SkPath.prototype.addArc = function(oval, startAngle, sweepAngle) {
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// see arc() for the HTMLCanvas version
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// note input angles are degrees.
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this._addArc(oval, startAngle, sweepAngle);
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return this;
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};
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CanvasKit.SkPath.prototype.addPath = function() {
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// Takes 1, 2, 7, or 10 required args, where the first arg is always the path.
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// The last arg is optional and chooses between add or extend mode.
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// The options for the remaining args are:
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// - an array of 6 or 9 parameters (perspective is optional)
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// - the 9 parameters of a full matrix or
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// the 6 non-perspective params of a matrix.
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var args = Array.prototype.slice.call(arguments);
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var path = args[0];
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var extend = false;
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if (typeof args[args.length-1] === "boolean") {
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extend = args.pop();
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}
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if (args.length === 1) {
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// Add path, unchanged. Use identity matrix
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this._addPath(path, 1, 0, 0,
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0, 1, 0,
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0, 0, 1,
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extend);
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} else if (args.length === 2) {
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// User provided the 9 params of a full matrix as an array.
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var a = args[1];
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this._addPath(path, a[0], a[1], a[2],
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a[3], a[4], a[5],
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a[6] || 0, a[7] || 0, a[8] || 1,
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extend);
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} else if (args.length === 7 || args.length === 10) {
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// User provided the 9 params of a (full) matrix directly.
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// (or just the 6 non perspective ones)
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// These are in the same order as what Skia expects.
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var a = args;
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this._addPath(path, a[1], a[2], a[3],
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a[4], a[5], a[6],
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a[7] || 0, a[8] || 0, a[9] || 1,
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extend);
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} else {
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SkDebug('addPath expected to take 1, 2, 7, or 10 required args. Got ' + args.length);
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return null;
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}
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return this;
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};
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CanvasKit.SkPath.prototype.addRect = function() {
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// Takes 1, 2, 4 or 5 args
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// - SkRect
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// - SkRect, isCCW
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// - left, top, right, bottom
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// - left, top, right, bottom, isCCW
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if (arguments.length === 1 || arguments.length === 2) {
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var r = arguments[0];
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var ccw = arguments[1] || false;
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this._addRect(r.fLeft, r.fTop, r.fRight, r.fBottom, ccw);
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} else if (arguments.length === 4 || arguments.length === 5) {
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var a = arguments;
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this._addRect(a[0], a[1], a[2], a[3], a[4] || false);
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} else {
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SkDebug('addRect expected to take 1, 2, 4, or 5 args. Got ' + arguments.length);
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return null;
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}
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return this;
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};
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CanvasKit.SkPath.prototype.addRoundRect = function() {
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// Takes 3, 4, 6 or 7 args
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// - SkRect, radii, ccw
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// - SkRect, rx, ry, ccw
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// - left, top, right, bottom, radii, ccw
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// - left, top, right, bottom, rx, ry, ccw
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var args = arguments;
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if (args.length === 3 || args.length === 6) {
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var radii = args[args.length-2];
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} else if (args.length === 6 || args.length === 7){
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// duplicate the given (rx, ry) pairs for each corner.
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var rx = args[args.length-3];
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var ry = args[args.length-2];
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var radii = [rx, ry, rx, ry, rx, ry, rx, ry];
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} else {
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SkDebug('addRoundRect expected to take 3, 4, 6, or 7 args. Got ' + args.length);
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return null;
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}
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if (radii.length !== 8) {
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SkDebug('addRoundRect needs 8 radii provided. Got ' + radii.length);
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return null;
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}
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var rptr = copy1dArray(radii, CanvasKit.HEAPF32);
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if (args.length === 3 || args.length === 4) {
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var r = args[0];
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var ccw = args[args.length - 1];
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this._addRoundRect(r.fLeft, r.fTop, r.fRight, r.fBottom, rptr, ccw);
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} else if (args.length === 6 || args.length === 7) {
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var a = args;
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this._addRoundRect(a[0], a[1], a[2], a[3], rptr, ccw);
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}
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CanvasKit._free(rptr);
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return this;
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};
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CanvasKit.SkPath.prototype.arc = function(x, y, radius, startAngle, endAngle, ccw) {
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// emulates the HTMLCanvas behavior. See addArc() for the SkPath version.
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// Note input angles are radians.
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var bounds = CanvasKit.LTRBRect(x-radius, y-radius, x+radius, y+radius);
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var sweep = radiansToDegrees(endAngle - startAngle) - (360 * !!ccw);
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var temp = new CanvasKit.SkPath();
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temp.addArc(bounds, radiansToDegrees(startAngle), sweep);
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this.addPath(temp, true);
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temp.delete();
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return this;
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};
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CanvasKit.SkPath.prototype.arcTo = function() {
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// takes 4, 5 or 7 args
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// - 5 x1, y1, x2, y2, radius
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// - 4 oval (as Rect), startAngle, sweepAngle, forceMoveTo
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// - 7 x1, y1, x2, y2, startAngle, sweepAngle, forceMoveTo
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var args = arguments;
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if (args.length === 5) {
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this._arcTo(args[0], args[1], args[2], args[3], args[4]);
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} else if (args.length === 4) {
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this._arcTo(args[0], args[1], args[2], args[3]);
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} else if (args.length === 7) {
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this._arcTo(CanvasKit.LTRBRect(args[0], args[1], args[2], args[3]),
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args[4], args[5], args[6]);
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} else {
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throw 'Invalid args for arcTo. Expected 4, 5, or 7, got '+ args.length;
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}
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return this;
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};
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CanvasKit.SkPath.prototype.close = function() {
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this._close();
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return this;
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};
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CanvasKit.SkPath.prototype.conicTo = function(x1, y1, x2, y2, w) {
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this._conicTo(x1, y1, x2, y2, w);
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return this;
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};
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CanvasKit.SkPath.prototype.cubicTo = function(cp1x, cp1y, cp2x, cp2y, x, y) {
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this._cubicTo(cp1x, cp1y, cp2x, cp2y, x, y);
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return this;
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};
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CanvasKit.SkPath.prototype.dash = function(on, off, phase) {
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if (this._dash(on, off, phase)) {
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return this;
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}
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return null;
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};
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CanvasKit.SkPath.prototype.lineTo = function(x, y) {
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this._lineTo(x, y);
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return this;
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};
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CanvasKit.SkPath.prototype.moveTo = function(x, y) {
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this._moveTo(x, y);
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return this;
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};
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CanvasKit.SkPath.prototype.op = function(otherPath, op) {
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if (this._op(otherPath, op)) {
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return this;
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}
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return null;
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};
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CanvasKit.SkPath.prototype.quadTo = function(cpx, cpy, x, y) {
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this._quadTo(cpx, cpy, x, y);
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return this;
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};
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CanvasKit.SkPath.prototype.simplify = function() {
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if (this._simplify()) {
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return this;
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}
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return null;
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};
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CanvasKit.SkPath.prototype.stroke = function(opts) {
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// Fill out any missing values with the default values.
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/**
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* See externs.js for this definition
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* @type {StrokeOpts}
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*/
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opts = opts || {};
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opts.width = opts.width || 1;
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opts.miter_limit = opts.miter_limit || 4;
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opts.cap = opts.cap || CanvasKit.StrokeCap.Butt;
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opts.join = opts.join || CanvasKit.StrokeJoin.Miter;
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opts.precision = opts.precision || 1;
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if (this._stroke(opts)) {
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return this;
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}
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return null;
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};
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CanvasKit.SkPath.prototype.transform = function() {
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// Takes 1 or 9 args
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if (arguments.length === 1) {
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// argument 1 should be a 6 or 9 element array.
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var a = arguments[0];
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this._transform(a[0], a[1], a[2],
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a[3], a[4], a[5],
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a[6] || 0, a[7] || 0, a[8] || 1);
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} else if (arguments.length === 6 || arguments.length === 9) {
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// these arguments are the 6 or 9 members of the matrix
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var a = arguments;
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this._transform(a[0], a[1], a[2],
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a[3], a[4], a[5],
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a[6] || 0, a[7] || 0, a[8] || 1);
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} else {
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throw 'transform expected to take 1 or 9 arguments. Got ' + arguments.length;
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}
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return this;
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};
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// isComplement is optional, defaults to false
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CanvasKit.SkPath.prototype.trim = function(startT, stopT, isComplement) {
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if (this._trim(startT, stopT, !!isComplement)) {
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return this;
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}
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return null;
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};
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// bones should be a 3d array.
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// Each bone is a 3x2 transformation matrix in column major order:
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// | scaleX skewX transX |
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// | skewY scaleY transY |
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// and bones is an array of those matrices.
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// Returns a copy of this (SkVertices) with the bones applied.
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CanvasKit.SkVertices.prototype.applyBones = function(bones) {
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var bPtr = copy3dArray(bones, CanvasKit.HEAPF32);
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var vert = this._applyBones(bPtr, bones.length);
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CanvasKit._free(bPtr);
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return vert;
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}
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CanvasKit.SkImage.prototype.encodeToData = function() {
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if (!arguments.length) {
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return this._encodeToData();
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}
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if (arguments.length === 2) {
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var a = arguments;
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return this._encodeToDataWithFormat(a[0], a[1]);
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}
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throw 'encodeToData expected to take 0 or 2 arguments. Got ' + arguments.length;
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}
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CanvasKit.SkCanvas.prototype.drawText = function(str, x, y, font, paint) {
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// lengthBytesUTF8 and stringToUTF8Array are defined in the emscripten
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// JS. See https://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html#stringToUTF8
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// Add 1 for null terminator
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var strLen = lengthBytesUTF8(str) + 1;
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var strPtr = CanvasKit._malloc(strLen);
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// Add 1 for the null terminator.
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stringToUTF8(str, strPtr, strLen);
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this._drawSimpleText(strPtr, strLen, x, y, font, paint);
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}
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// returns Uint8Array
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CanvasKit.SkCanvas.prototype.readPixels = function(x, y, w, h, alphaType,
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colorType, dstRowBytes) {
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// supply defaults (which are compatible with HTMLCanvas's getImageData)
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alphaType = alphaType || CanvasKit.AlphaType.Unpremul;
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colorType = colorType || CanvasKit.ColorType.RGBA_8888;
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dstRowBytes = dstRowBytes || (4 * w);
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var len = h * dstRowBytes
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var pptr = CanvasKit._malloc(len);
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var ok = this._readPixels({
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'width': w,
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'height': h,
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'colorType': colorType,
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'alphaType': alphaType,
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}, pptr, dstRowBytes, x, y);
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if (!ok) {
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CanvasKit._free(pptr);
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return null;
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}
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// The first typed array is just a view into memory. Because we will
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// be free-ing that, we call slice to make a persistent copy.
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var pixels = new Uint8Array(CanvasKit.HEAPU8.buffer, pptr, len).slice();
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CanvasKit._free(pptr);
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return pixels;
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}
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// pixels is a TypedArray. No matter the input size, it will be treated as
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// a Uint8Array (essentially, a byte array).
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CanvasKit.SkCanvas.prototype.writePixels = function(pixels, srcWidth, srcHeight,
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destX, destY, alphaType, colorType) {
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if (pixels.byteLength % (srcWidth * srcHeight)) {
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throw 'pixels length must be a multiple of the srcWidth * srcHeight';
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}
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var bytesPerPixel = pixels.byteLength / (srcWidth * srcHeight);
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// supply defaults (which are compatible with HTMLCanvas's putImageData)
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alphaType = alphaType || CanvasKit.AlphaType.Unpremul;
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colorType = colorType || CanvasKit.ColorType.RGBA_8888;
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var srcRowBytes = bytesPerPixel * srcWidth;
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var pptr = CanvasKit._malloc(pixels.byteLength);
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CanvasKit.HEAPU8.set(pixels, pptr);
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var ok = this._writePixels({
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'width': srcWidth,
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'height': srcHeight,
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'colorType': colorType,
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'alphaType': alphaType,
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}, pptr, srcRowBytes, destX, destY);
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CanvasKit._free(pptr);
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return ok;
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}
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// fontData should be an arrayBuffer
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CanvasKit.SkFontMgr.prototype.MakeTypefaceFromData = function(fontData) {
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var data = new Uint8Array(fontData);
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var fptr = CanvasKit._malloc(data.byteLength);
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CanvasKit.HEAPU8.set(data, fptr);
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|
var font = this._makeTypefaceFromData(fptr, data.byteLength);
|
|
if (!font) {
|
|
SkDebug('Could not decode font data');
|
|
// We do not need to free the data since the C++ will do that for us
|
|
// when the font is deleted (or fails to decode);
|
|
return null;
|
|
}
|
|
return font;
|
|
}
|
|
|
|
CanvasKit.SkTextBlob.MakeFromText = function(str, font) {
|
|
// lengthBytesUTF8 and stringToUTF8Array are defined in the emscripten
|
|
// JS. See https://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html#stringToUTF8
|
|
// Add 1 for null terminator
|
|
var strLen = lengthBytesUTF8(str) + 1;
|
|
var strPtr = CanvasKit._malloc(strLen);
|
|
// Add 1 for the null terminator.
|
|
stringToUTF8(str, strPtr, strLen);
|
|
|
|
var blob = CanvasKit.SkTextBlob._MakeFromText(strPtr, strLen - 1, font, CanvasKit.TextEncoding.UTF8);
|
|
if (!blob) {
|
|
SkDebug('Could not make textblob from string "' + str + '"');
|
|
return null;
|
|
}
|
|
|
|
var origDelete = blob.delete.bind(blob);
|
|
blob.delete = function() {
|
|
CanvasKit._free(strPtr);
|
|
origDelete();
|
|
}
|
|
return blob;
|
|
}
|
|
|
|
// Run through the JS files that are added at compile time.
|
|
if (CanvasKit._extraInitializations) {
|
|
CanvasKit._extraInitializations.forEach(function(init) {
|
|
init();
|
|
});
|
|
}
|
|
} // end CanvasKit.onRuntimeInitialized, that is, anything changing prototypes or dynamic.
|
|
|
|
CanvasKit.LTRBRect = function(l, t, r, b) {
|
|
return {
|
|
fLeft: l,
|
|
fTop: t,
|
|
fRight: r,
|
|
fBottom: b,
|
|
};
|
|
}
|
|
|
|
CanvasKit.XYWHRect = function(x, y, w, h) {
|
|
return {
|
|
fLeft: x,
|
|
fTop: y,
|
|
fRight: x+w,
|
|
fBottom: y+h,
|
|
};
|
|
}
|
|
|
|
var nullptr = 0; // emscripten doesn't like to take null as uintptr_t
|
|
|
|
// arr can be a normal JS array or a TypedArray
|
|
// dest is something like CanvasKit.HEAPF32
|
|
function copy1dArray(arr, dest) {
|
|
if (!arr || !arr.length) {
|
|
return nullptr;
|
|
}
|
|
var ptr = CanvasKit._malloc(arr.length * dest.BYTES_PER_ELEMENT);
|
|
// In c++ terms, the WASM heap is a uint8_t*, a long buffer/array of single
|
|
// byte elements. When we run _malloc, we always get an offset/pointer into
|
|
// that block of memory.
|
|
// CanvasKit exposes some different views to make it easier to work with
|
|
// different types. HEAPF32 for example, exposes it as a float*
|
|
// However, to make the ptr line up, we have to do some pointer arithmetic.
|
|
// Concretely, we need to convert ptr to go from an index into a 1-byte-wide
|
|
// buffer to an index into a 4-byte-wide buffer (in the case of HEAPF32)
|
|
// and thus we divide ptr by 4.
|
|
dest.set(arr, ptr / dest.BYTES_PER_ELEMENT);
|
|
return ptr;
|
|
}
|
|
|
|
// arr should be a non-jagged 2d JS array (TypeyArrays can't be nested
|
|
// inside themselves.)
|
|
// dest is something like CanvasKit.HEAPF32
|
|
function copy2dArray(arr, dest) {
|
|
if (!arr || !arr.length) {
|
|
return nullptr;
|
|
}
|
|
var ptr = CanvasKit._malloc(arr.length * arr[0].length * dest.BYTES_PER_ELEMENT);
|
|
var idx = 0;
|
|
var adjustedPtr = ptr / dest.BYTES_PER_ELEMENT;
|
|
for (var r = 0; r < arr.length; r++) {
|
|
for (var c = 0; c < arr[0].length; c++) {
|
|
dest[adjustedPtr + idx] = arr[r][c];
|
|
idx++;
|
|
}
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
// arr should be a non-jagged 3d JS array (TypeyArrays can't be nested
|
|
// inside themselves.)
|
|
// dest is something like CanvasKit.HEAPF32
|
|
function copy3dArray(arr, dest) {
|
|
if (!arr || !arr.length || !arr[0].length) {
|
|
return nullptr;
|
|
}
|
|
var ptr = CanvasKit._malloc(arr.length * arr[0].length * arr[0][0].length * dest.BYTES_PER_ELEMENT);
|
|
var idx = 0;
|
|
var adjustedPtr = ptr / dest.BYTES_PER_ELEMENT;
|
|
for (var x = 0; x < arr.length; x++) {
|
|
for (var y = 0; y < arr[0].length; y++) {
|
|
for (var z = 0; z < arr[0][0].length; z++) {
|
|
dest[adjustedPtr + idx] = arr[x][y][z];
|
|
idx++;
|
|
}
|
|
}
|
|
}
|
|
return ptr;
|
|
}
|
|
|
|
// Caching the Float32Arrays can save having to reallocate them
|
|
// over and over again.
|
|
var Float32ArrayCache = {};
|
|
|
|
// Takes a 2D array of commands and puts them into the WASM heap
|
|
// as a 1D array. This allows them to referenced from the C++ code.
|
|
// Returns a 2 element array, with the first item being essentially a
|
|
// pointer to the array and the second item being the length of
|
|
// the new 1D array.
|
|
//
|
|
// Example usage:
|
|
// let cmds = [
|
|
// [CanvasKit.MOVE_VERB, 0, 10],
|
|
// [CanvasKit.LINE_VERB, 30, 40],
|
|
// [CanvasKit.QUAD_VERB, 20, 50, 45, 60],
|
|
// ];
|
|
function loadCmdsTypedArray(arr) {
|
|
var len = 0;
|
|
for (var r = 0; r < arr.length; r++) {
|
|
len += arr[r].length;
|
|
}
|
|
|
|
var ta;
|
|
if (Float32ArrayCache[len]) {
|
|
ta = Float32ArrayCache[len];
|
|
} else {
|
|
ta = new Float32Array(len);
|
|
Float32ArrayCache[len] = ta;
|
|
}
|
|
// Flatten into a 1d array
|
|
var i = 0;
|
|
for (var r = 0; r < arr.length; r++) {
|
|
for (var c = 0; c < arr[r].length; c++) {
|
|
var item = arr[r][c];
|
|
ta[i] = item;
|
|
i++;
|
|
}
|
|
}
|
|
|
|
var ptr = copy1dArray(ta, CanvasKit.HEAPF32);
|
|
return [ptr, len];
|
|
}
|
|
|
|
CanvasKit.MakePathFromCmds = function(cmds) {
|
|
var ptrLen = loadCmdsTypedArray(cmds);
|
|
var path = CanvasKit._MakePathFromCmds(ptrLen[0], ptrLen[1]);
|
|
CanvasKit._free(ptrLen[0]);
|
|
return path;
|
|
}
|
|
|
|
CanvasKit.MakeSkDashPathEffect = function(intervals, phase) {
|
|
if (!phase) {
|
|
phase = 0;
|
|
}
|
|
if (!intervals.length || intervals.length % 2 === 1) {
|
|
throw 'Intervals array must have even length';
|
|
}
|
|
var ptr = copy1dArray(intervals, CanvasKit.HEAPF32);
|
|
var dpe = CanvasKit._MakeSkDashPathEffect(ptr, intervals.length, phase);
|
|
CanvasKit._free(ptr);
|
|
return dpe;
|
|
}
|
|
|
|
// data is a TypedArray or ArrayBuffer e.g. from fetch().then(resp.arrayBuffer())
|
|
CanvasKit.MakeImageFromEncoded = function(data) {
|
|
data = new Uint8Array(data);
|
|
|
|
var iptr = CanvasKit._malloc(data.byteLength);
|
|
CanvasKit.HEAPU8.set(data, iptr);
|
|
var img = CanvasKit._decodeImage(iptr, data.byteLength);
|
|
if (!img) {
|
|
SkDebug('Could not decode image');
|
|
CanvasKit._free(iptr);
|
|
return null;
|
|
}
|
|
var realDelete = img.delete.bind(img);
|
|
img.delete = function() {
|
|
CanvasKit._free(iptr);
|
|
realDelete();
|
|
}
|
|
return img;
|
|
}
|
|
|
|
// imgData is an Encoded SkImage, e.g. from MakeImageFromEncoded
|
|
CanvasKit.MakeImageShader = function(img, xTileMode, yTileMode, clampUnpremul, localMatrix) {
|
|
if (!img) {
|
|
return null;
|
|
}
|
|
clampUnpremul = clampUnpremul || false;
|
|
if (localMatrix) {
|
|
// Add perspective args if not provided.
|
|
if (localMatrix.length === 6) {
|
|
localMatrix.push(0, 0, 1);
|
|
}
|
|
return CanvasKit._MakeImageShader(img, xTileMode, yTileMode, clampUnpremul, localMatrix);
|
|
} else {
|
|
return CanvasKit._MakeImageShader(img, xTileMode, yTileMode, clampUnpremul);
|
|
}
|
|
}
|
|
|
|
// pixels is a Uint8Array
|
|
CanvasKit.MakeImage = function(pixels, width, height, alphaType, colorType) {
|
|
var bytesPerPixel = pixels.byteLength / (width * height);
|
|
var info = {
|
|
'width': width,
|
|
'height': height,
|
|
'alphaType': alphaType,
|
|
'colorType': colorType,
|
|
};
|
|
var pptr = CanvasKit._malloc(pixels.byteLength);
|
|
CanvasKit.HEAPU8.set(pixels, pptr);
|
|
// No need to _free iptr, Image takes it with SkData::MakeFromMalloc
|
|
|
|
return CanvasKit._MakeImage(info, pptr, pixels.byteLength, width * bytesPerPixel);
|
|
}
|
|
|
|
CanvasKit.MakeLinearGradientShader = function(start, end, colors, pos, mode, localMatrix, flags) {
|
|
var colorPtr = copy1dArray(colors, CanvasKit.HEAP32);
|
|
var posPtr = copy1dArray(pos, CanvasKit.HEAPF32);
|
|
flags = flags || 0;
|
|
|
|
if (localMatrix) {
|
|
// Add perspective args if not provided.
|
|
if (localMatrix.length === 6) {
|
|
localMatrix.push(0, 0, 1);
|
|
}
|
|
var lgs = CanvasKit._MakeLinearGradientShader(start, end, colorPtr, posPtr,
|
|
colors.length, mode, flags, localMatrix);
|
|
} else {
|
|
var lgs = CanvasKit._MakeLinearGradientShader(start, end, colorPtr, posPtr,
|
|
colors.length, mode, flags);
|
|
}
|
|
|
|
CanvasKit._free(colorPtr);
|
|
CanvasKit._free(posPtr);
|
|
return lgs;
|
|
}
|
|
|
|
CanvasKit.MakeRadialGradientShader = function(center, radius, colors, pos, mode, localMatrix, flags) {
|
|
var colorPtr = copy1dArray(colors, CanvasKit.HEAP32);
|
|
var posPtr = copy1dArray(pos, CanvasKit.HEAPF32);
|
|
flags = flags || 0;
|
|
|
|
if (localMatrix) {
|
|
// Add perspective args if not provided.
|
|
if (localMatrix.length === 6) {
|
|
localMatrix.push(0, 0, 1);
|
|
}
|
|
var rgs = CanvasKit._MakeRadialGradientShader(center, radius, colorPtr, posPtr,
|
|
colors.length, mode, flags, localMatrix);
|
|
} else {
|
|
var rgs = CanvasKit._MakeRadialGradientShader(center, radius, colorPtr, posPtr,
|
|
colors.length, mode, flags);
|
|
}
|
|
|
|
CanvasKit._free(colorPtr);
|
|
CanvasKit._free(posPtr);
|
|
return rgs;
|
|
}
|
|
|
|
CanvasKit.MakeTwoPointConicalGradientShader = function(start, startRadius, end, endRadius,
|
|
colors, pos, mode, localMatrix, flags) {
|
|
var colorPtr = copy1dArray(colors, CanvasKit.HEAP32);
|
|
var posPtr = copy1dArray(pos, CanvasKit.HEAPF32);
|
|
flags = flags || 0;
|
|
|
|
if (localMatrix) {
|
|
// Add perspective args if not provided.
|
|
if (localMatrix.length === 6) {
|
|
localMatrix.push(0, 0, 1);
|
|
}
|
|
var rgs = CanvasKit._MakeTwoPointConicalGradientShader(
|
|
start, startRadius, end, endRadius,
|
|
colorPtr, posPtr, colors.length, mode, flags, localMatrix);
|
|
} else {
|
|
var rgs = CanvasKit._MakeTwoPointConicalGradientShader(
|
|
start, startRadius, end, endRadius,
|
|
colorPtr, posPtr, colors.length, mode, flags);
|
|
}
|
|
|
|
CanvasKit._free(colorPtr);
|
|
CanvasKit._free(posPtr);
|
|
return rgs;
|
|
}
|
|
|
|
CanvasKit.MakeSkVertices = function(mode, positions, textureCoordinates, colors,
|
|
boneIndices, boneWeights, indices) {
|
|
var positionPtr = copy2dArray(positions, CanvasKit.HEAPF32);
|
|
var texPtr = copy2dArray(textureCoordinates, CanvasKit.HEAPF32);
|
|
// Since we write the colors to memory as signed integers (JSColor), we can
|
|
// read them out on the other side as unsigned ints (SkColor) just fine
|
|
// - it's effectively casting.
|
|
var colorPtr = copy1dArray(colors, CanvasKit.HEAP32);
|
|
|
|
var boneIdxPtr = copy2dArray(boneIndices, CanvasKit.HEAP32);
|
|
var boneWtPtr = copy2dArray(boneWeights, CanvasKit.HEAPF32);
|
|
var idxPtr = copy1dArray(indices, CanvasKit.HEAPU16);
|
|
|
|
var idxCount = (indices && indices.length) || 0;
|
|
// _MakeVertices will copy all the values in, so we are free to release
|
|
// the memory after.
|
|
var vertices = CanvasKit._MakeSkVertices(mode, positions.length, positionPtr,
|
|
texPtr, colorPtr, boneIdxPtr, boneWtPtr,
|
|
idxCount, idxPtr);
|
|
positionPtr && CanvasKit._free(positionPtr);
|
|
texPtr && CanvasKit._free(texPtr);
|
|
colorPtr && CanvasKit._free(colorPtr);
|
|
idxPtr && CanvasKit._free(idxPtr);
|
|
boneIdxPtr && CanvasKit._free(boneIdxPtr);
|
|
boneWtPtr && CanvasKit._free(boneWtPtr);
|
|
return vertices;
|
|
}
|
|
|
|
}(Module)); // When this file is loaded in, the high level object is "Module";
|
|
|
|
// Intentionally added outside the scope to allow usage in canvas2d.js and other
|
|
// pre-js files. These names are unlikely to cause emscripten collisions.
|
|
function radiansToDegrees(rad) {
|
|
return (rad / Math.PI) * 180;
|
|
}
|
|
|
|
function degreesToRadians(deg) {
|
|
return (deg / 180) * Math.PI;
|
|
}
|
|
|