d0c9d0cb7f
I found this to be about 15% faster on a benchmark designed to stress these functions. https://github.com/flutter/flutter/issues/61305 Change-Id: I9dc2a8396e54c55464bb71562de0c07c853e829c Reviewed-on: https://skia-review.googlesource.com/c/skia/+/303024 Reviewed-by: Kevin Lubick <kjlubick@google.com> Commit-Queue: Nathaniel Nifong <nifong@google.com>
1571 lines
57 KiB
JavaScript
1571 lines
57 KiB
JavaScript
// 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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// 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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_scratchColor = CanvasKit.Malloc(Float32Array, 4); // 4 color scalars.
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_scratchColorPtr = _scratchColor['byteOffset'];
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_scratch4x4Matrix = CanvasKit.Malloc(Float32Array, 16); // 16 matrix scalars.
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_scratch4x4MatrixPtr = _scratch4x4Matrix['byteOffset'];
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_scratch3x3Matrix = CanvasKit.Malloc(Float32Array, 9); // 9 matrix scalars.
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_scratch3x3MatrixPtr = _scratch3x3Matrix['byteOffset'];
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// Create single copies of all three supported color spaces
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// These are sk_sp<SkColorSpace>
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CanvasKit.SkColorSpace.SRGB = CanvasKit.SkColorSpace._MakeSRGB();
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CanvasKit.SkColorSpace.DISPLAY_P3 = CanvasKit.SkColorSpace._MakeDisplayP3();
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CanvasKit.SkColorSpace.ADOBE_RGB = CanvasKit.SkColorSpace._MakeAdobeRGB();
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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() { // to be called with an even number of scalar args
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var acc = 0;
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for (var i=0; i < arguments.length-1; i+=2) {
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acc += arguments[i] * arguments[i+1];
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}
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return acc;
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}
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// Private general matrix functions used in both 3x3s and 4x4s.
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// Return a square identity matrix of size n.
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var identityN = function(n) {
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var size = n*n;
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var m = new Array(size);
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while(size--) {
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m[size] = size%(n+1) == 0 ? 1.0 : 0.0;
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}
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return m;
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}
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// Stride, a function for compactly representing several ways of copying an array into another.
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// Write vector `v` into matrix `m`. `m` is a matrix encoded as an array in row-major
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// order. Its width is passed as `width`. `v` is an array with length < (m.length/width).
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// An element of `v` is copied into `m` starting at `offset` and moving `colStride` cols right
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// each row.
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//
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// For example, a width of 4, offset of 3, and stride of -1 would put the vector here.
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// _ _ 0 _
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// _ 1 _ _
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// 2 _ _ _
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// _ _ _ 3
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//
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var stride = function(v, m, width, offset, colStride) {
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for (var i=0; i<v.length; i++) {
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m[i * width + // column
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(i * colStride + offset + width) % width // row
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] = v[i];
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}
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return m;
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}
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CanvasKit.SkMatrix.identity = function() {
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return identityN(3);
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};
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// Return the inverse (if it exists) of this matrix.
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// Otherwise, return null.
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CanvasKit.SkMatrix.invert = function(m) {
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// Find the determinant by the sarrus rule. https://en.wikipedia.org/wiki/Rule_of_Sarrus
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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 null;
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}
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// Return the inverse by the formula adj(m)/det.
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// adj (adjugate) of a 3x3 is the transpose of it's cofactor matrix.
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// a cofactor matrix is a matrix where each term is +-det(N) where matrix N is the 2x2 formed
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// by removing the row and column we're currently setting from the source.
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// the sign alternates in a checkerboard pattern with a `+` at the top left.
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// that's all been combined here into one expression.
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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 (skIsDebug && (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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function isnumber(val) { return val !== NaN; };
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// generalized iterative algorithm for multiplying two matrices.
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function multiply(m1, m2, size) {
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if (skIsDebug && (!m1.every(isnumber) || !m2.every(isnumber))) {
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throw 'Some members of matrices are NaN m1='+m1+', m2='+m2+'';
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}
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if (skIsDebug && (m1.length !== m2.length)) {
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throw 'Undefined for matrices of different sizes. m1.length='+m1.length+', m2.length='+m2.length;
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}
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if (skIsDebug && (size*size !== m1.length)) {
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throw 'Undefined for non-square matrices. array size was '+size;
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}
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var result = Array(m1.length);
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for (var r = 0; r < size; r++) {
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for (var c = 0; c < size; c++) {
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// accumulate a sum of m1[r,k]*m2[k, c]
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var acc = 0;
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for (var k = 0; k < size; k++) {
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acc += m1[size * r + k] * m2[size * k + c];
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}
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result[r * size + c] = acc;
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}
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}
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return result;
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};
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// Accept an integer indicating the size of the matrices being multiplied (3 for 3x3), and any
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// number of matrices following it.
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function multiplyMany(size, listOfMatrices) {
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if (skIsDebug && (listOfMatrices.length < 2)) {
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throw 'multiplication expected two or more matrices';
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}
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var result = multiply(listOfMatrices[0], listOfMatrices[1], size);
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var next = 2;
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while (next < listOfMatrices.length) {
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result = multiply(result, listOfMatrices[next], size);
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next++;
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}
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return result;
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};
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// Accept any number 3x3 of matrices as arguments, multiply them together.
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// Matrix multiplication is associative but not commutative. the order of the arguments
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// matters, but it does not matter that this implementation multiplies them left to right.
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CanvasKit.SkMatrix.multiply = function() {
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return multiplyMany(3, arguments);
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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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var m = stride([sx, sy], identityN(3), 3, 0, 1);
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return stride([px-sx*px, py-sy*py], m, 3, 2, 0);
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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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var m = stride([kx, ky], identityN(3), 3, 1, -1);
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return stride([-kx*px, -ky*py], m, 3, 2, 0);
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};
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CanvasKit.SkMatrix.translated = function(dx, dy) {
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return stride(arguments, identityN(3), 3, 2, 0);
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};
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// Functions for manipulating vectors.
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// Loosely based off of SkV3 in SkM44.h but skia also has SkVec2 and Skv4. This combines them and
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// works on vectors of any length.
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CanvasKit.SkVector = {};
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CanvasKit.SkVector.dot = function(a, b) {
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if (skIsDebug && (a.length !== b.length)) {
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throw 'Cannot perform dot product on arrays of different length ('+a.length+' vs '+b.length+')';
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}
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return a.map(function(v, i) { return v*b[i] }).reduce(function(acc, cur) { return acc + cur; });
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}
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CanvasKit.SkVector.lengthSquared = function(v) {
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return CanvasKit.SkVector.dot(v, v);
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}
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CanvasKit.SkVector.length = function(v) {
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return Math.sqrt(CanvasKit.SkVector.lengthSquared(v));
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}
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CanvasKit.SkVector.mulScalar = function(v, s) {
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return v.map(function(i) { return i*s });
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}
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CanvasKit.SkVector.add = function(a, b) {
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return a.map(function(v, i) { return v+b[i] });
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}
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CanvasKit.SkVector.sub = function(a, b) {
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return a.map(function(v, i) { return v-b[i]; });
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}
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CanvasKit.SkVector.dist = function(a, b) {
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return CanvasKit.SkVector.length(CanvasKit.SkVector.sub(a, b));
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}
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CanvasKit.SkVector.normalize = function(v) {
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return CanvasKit.SkVector.mulScalar(v, 1/CanvasKit.SkVector.length(v));
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}
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CanvasKit.SkVector.cross = function(a, b) {
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if (skIsDebug && (a.length !== 3 || a.length !== 3)) {
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throw 'Cross product is only defined for 3-dimensional vectors (a.length='+a.length+', b.length='+b.length+')';
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}
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return [
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a[1]*b[2] - a[2]*b[1],
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a[2]*b[0] - a[0]*b[2],
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a[0]*b[1] - a[1]*b[0],
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];
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}
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// Functions for creating and manipulating (row-major) 4x4 matrices. Accepted in place of
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// SkM44 in canvas methods, for the same reasons as the 3x3 matrices above.
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// ported from C++ code in SkM44.cpp
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CanvasKit.SkM44 = {};
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// Create a 4x4 identity matrix
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CanvasKit.SkM44.identity = function() {
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return identityN(4);
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}
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// Anything named vec below is an array of length 3 representing a vector/point in 3D space.
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// Create a 4x4 matrix representing a translate by the provided 3-vec
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CanvasKit.SkM44.translated = function(vec) {
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return stride(vec, identityN(4), 4, 3, 0);
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}
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// Create a 4x4 matrix representing a scaling by the provided 3-vec
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CanvasKit.SkM44.scaled = function(vec) {
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return stride(vec, identityN(4), 4, 0, 1);
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}
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// Create a 4x4 matrix representing a rotation about the provided axis 3-vec.
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// axis does not need to be normalized.
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CanvasKit.SkM44.rotated = function(axisVec, radians) {
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return CanvasKit.SkM44.rotatedUnitSinCos(
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CanvasKit.SkVector.normalize(axisVec), Math.sin(radians), Math.cos(radians));
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}
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// Create a 4x4 matrix representing a rotation about the provided normalized axis 3-vec.
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// Rotation is provided redundantly as both sin and cos values.
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// This rotate can be used when you already have the cosAngle and sinAngle values
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// so you don't have to atan(cos/sin) to call roatated() which expects an angle in radians.
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// this does no checking! Behavior for invalid sin or cos values or non-normalized axis vectors
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// is incorrect. Prefer rotated().
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CanvasKit.SkM44.rotatedUnitSinCos = function(axisVec, sinAngle, cosAngle) {
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var x = axisVec[0];
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var y = axisVec[1];
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var z = axisVec[2];
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var c = cosAngle;
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var s = sinAngle;
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var t = 1 - c;
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return [
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t*x*x + c, t*x*y - s*z, t*x*z + s*y, 0,
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t*x*y + s*z, t*y*y + c, t*y*z - s*x, 0,
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t*x*z - s*y, t*y*z + s*x, t*z*z + c, 0,
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0, 0, 0, 1
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];
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}
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// Create a 4x4 matrix representing a camera at eyeVec, pointed at centerVec.
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CanvasKit.SkM44.lookat = function(eyeVec, centerVec, upVec) {
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var f = CanvasKit.SkVector.normalize(CanvasKit.SkVector.sub(centerVec, eyeVec));
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var u = CanvasKit.SkVector.normalize(upVec);
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var s = CanvasKit.SkVector.normalize(CanvasKit.SkVector.cross(f, u));
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var m = CanvasKit.SkM44.identity();
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// set each column's top three numbers
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stride(s, m, 4, 0, 0);
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stride(CanvasKit.SkVector.cross(s, f), m, 4, 1, 0);
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stride(CanvasKit.SkVector.mulScalar(f, -1), m, 4, 2, 0);
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stride(eyeVec, m, 4, 3, 0);
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var m2 = CanvasKit.SkM44.invert(m);
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if (m2 === null) {
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return CanvasKit.SkM44.identity();
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}
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return m2;
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}
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// Create a 4x4 matrix representing a perspective. All arguments are scalars.
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// angle is in radians.
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CanvasKit.SkM44.perspective = function(near, far, angle) {
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if (skIsDebug && (far <= near)) {
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throw "far must be greater than near when constructing SkM44 using perspective.";
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}
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var dInv = 1 / (far - near);
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var halfAngle = angle / 2;
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var cot = Math.cos(halfAngle) / Math.sin(halfAngle);
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return [
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cot, 0, 0, 0,
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0, cot, 0, 0,
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0, 0, (far+near)*dInv, 2*far*near*dInv,
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0, 0, -1, 1,
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];
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}
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// Returns the number at the given row and column in matrix m.
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CanvasKit.SkM44.rc = function(m, r, c) {
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return m[r*4+c];
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}
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// Accepts any number of 4x4 matrix arguments, multiplies them left to right.
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CanvasKit.SkM44.multiply = function() {
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return multiplyMany(4, arguments);
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}
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// Invert the 4x4 matrix if it is invertible and return it. if not, return null.
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// taken from SkM44.cpp (altered to use row-major order)
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// m is not altered.
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CanvasKit.SkM44.invert = function(m) {
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if (skIsDebug && !m.every(isnumber)) {
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throw 'some members of matrix are NaN m='+m;
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}
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var a00 = m[0];
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var a01 = m[4];
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var a02 = m[8];
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var a03 = m[12];
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var a10 = m[1];
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var a11 = m[5];
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var a12 = m[9];
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var a13 = m[13];
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var a20 = m[2];
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var a21 = m[6];
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var a22 = m[10];
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var a23 = m[14];
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var a30 = m[3];
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var a31 = m[7];
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var a32 = m[11];
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var a33 = m[15];
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var b00 = a00 * a11 - a01 * a10;
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var b01 = a00 * a12 - a02 * a10;
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var b02 = a00 * a13 - a03 * a10;
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var b03 = a01 * a12 - a02 * a11;
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var b04 = a01 * a13 - a03 * a11;
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var b05 = a02 * a13 - a03 * a12;
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var b06 = a20 * a31 - a21 * a30;
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var b07 = a20 * a32 - a22 * a30;
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var b08 = a20 * a33 - a23 * a30;
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var b09 = a21 * a32 - a22 * a31;
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var b10 = a21 * a33 - a23 * a31;
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var b11 = a22 * a33 - a23 * a32;
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// calculate determinate
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var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
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var invdet = 1.0 / det;
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// bail out if the matrix is not invertible
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if (det === 0 || invdet === Infinity) {
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SkDebug('Warning, uninvertible matrix');
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return null;
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}
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b00 *= invdet;
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b01 *= invdet;
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b02 *= invdet;
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b03 *= invdet;
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b04 *= invdet;
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b05 *= invdet;
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b06 *= invdet;
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b07 *= invdet;
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b08 *= invdet;
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b09 *= invdet;
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b10 *= invdet;
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b11 *= invdet;
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// store result in row major order
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var tmp = [
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a11 * b11 - a12 * b10 + a13 * b09,
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a12 * b08 - a10 * b11 - a13 * b07,
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a10 * b10 - a11 * b08 + a13 * b06,
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a11 * b07 - a10 * b09 - a12 * b06,
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a02 * b10 - a01 * b11 - a03 * b09,
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a00 * b11 - a02 * b08 + a03 * b07,
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a01 * b08 - a00 * b10 - a03 * b06,
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a00 * b09 - a01 * b07 + a02 * b06,
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a31 * b05 - a32 * b04 + a33 * b03,
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a32 * b02 - a30 * b05 - a33 * b01,
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a30 * b04 - a31 * b02 + a33 * b00,
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a31 * b01 - a30 * b03 - a32 * b00,
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a22 * b04 - a21 * b05 - a23 * b03,
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a20 * b05 - a22 * b02 + a23 * b01,
|
|
a21 * b02 - a20 * b04 - a23 * b00,
|
|
a20 * b03 - a21 * b01 + a22 * b00,
|
|
];
|
|
|
|
|
|
if (!tmp.every(function(val) { return val !== NaN && val !== Infinity && val !== -Infinity; })) {
|
|
SkDebug('inverted matrix contains infinities or NaN '+tmp);
|
|
return null;
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
CanvasKit.SkM44.transpose = function(m) {
|
|
return [
|
|
m[0], m[4], m[8], m[12],
|
|
m[1], m[5], m[9], m[13],
|
|
m[2], m[6], m[10], m[14],
|
|
m[3], m[7], m[11], m[15],
|
|
];
|
|
}
|
|
|
|
// Return the inverse of an SkM44. throw an error if it's not invertible
|
|
CanvasKit.SkM44.mustInvert = function(m) {
|
|
var m2 = CanvasKit.SkM44.invert(m);
|
|
if (m2 === null) {
|
|
throw "Matrix not invertible";
|
|
}
|
|
return m2;
|
|
}
|
|
|
|
// returns a matrix that sets up a 3D perspective view from a given camera.
|
|
//
|
|
// area - a rect describing the viewport. (0, 0, canvas_width, canvas_height) suggested
|
|
// zscale - a scalar describing the scale of the z axis. min(width, height)/2 suggested
|
|
// cam - an object with the following attributes
|
|
// const cam = {
|
|
// 'eye' : [0, 0, 1 / Math.tan(Math.PI / 24) - 1], // a 3D point locating the camera
|
|
// 'coa' : [0, 0, 0], // center of attention - the 3D point the camera is looking at.
|
|
// 'up' : [0, 1, 0], // a unit vector pointing in the camera's up direction, because eye and coa alone leave roll unspecified.
|
|
// 'near' : 0.02, // near clipping plane
|
|
// 'far' : 4, // far clipping plane
|
|
// 'angle': Math.PI / 12, // field of view in radians
|
|
// };
|
|
CanvasKit.SkM44.setupCamera = function(area, zscale, cam) {
|
|
var camera = CanvasKit.SkM44.lookat(cam['eye'], cam['coa'], cam['up']);
|
|
var perspective = CanvasKit.SkM44.perspective(cam['near'], cam['far'], cam['angle']);
|
|
var center = [(area.fLeft + area.fRight)/2, (area.fTop + area.fBottom)/2, 0];
|
|
var viewScale = [(area.fRight - area.fLeft)/2, (area.fBottom - area.fTop)/2, zscale];
|
|
var viewport = CanvasKit.SkM44.multiply(
|
|
CanvasKit.SkM44.translated(center),
|
|
CanvasKit.SkM44.scaled(viewScale));
|
|
return CanvasKit.SkM44.multiply(
|
|
viewport, perspective, camera, CanvasKit.SkM44.mustInvert(viewport));
|
|
}
|
|
|
|
// An SkColorMatrix is a 4x4 color matrix that transforms the 4 color channels
|
|
// with a 1x4 matrix that post-translates those 4 channels.
|
|
// For example, the following is the layout with the scale (S) and post-transform
|
|
// (PT) items indicated.
|
|
// RS, 0, 0, 0 | RPT
|
|
// 0, GS, 0, 0 | GPT
|
|
// 0, 0, BS, 0 | BPT
|
|
// 0, 0, 0, AS | APT
|
|
//
|
|
// Much of this was hand-transcribed from SkColorMatrix.cpp, because it's easier to
|
|
// deal with a Float32Array of length 20 than to try to expose the SkColorMatrix object.
|
|
|
|
var rScale = 0;
|
|
var gScale = 6;
|
|
var bScale = 12;
|
|
var aScale = 18;
|
|
|
|
var rPostTrans = 4;
|
|
var gPostTrans = 9;
|
|
var bPostTrans = 14;
|
|
var aPostTrans = 19;
|
|
|
|
CanvasKit.SkColorMatrix = {};
|
|
CanvasKit.SkColorMatrix.identity = function() {
|
|
var m = new Float32Array(20);
|
|
m[rScale] = 1;
|
|
m[gScale] = 1;
|
|
m[bScale] = 1;
|
|
m[aScale] = 1;
|
|
return m;
|
|
}
|
|
|
|
CanvasKit.SkColorMatrix.scaled = function(rs, gs, bs, as) {
|
|
var m = new Float32Array(20);
|
|
m[rScale] = rs;
|
|
m[gScale] = gs;
|
|
m[bScale] = bs;
|
|
m[aScale] = as;
|
|
return m;
|
|
}
|
|
|
|
var rotateIndices = [
|
|
[6, 7, 11, 12],
|
|
[0, 10, 2, 12],
|
|
[0, 1, 5, 6],
|
|
];
|
|
// axis should be 0, 1, 2 for r, g, b
|
|
CanvasKit.SkColorMatrix.rotated = function(axis, sine, cosine) {
|
|
var m = CanvasKit.SkColorMatrix.identity();
|
|
var indices = rotateIndices[axis];
|
|
m[indices[0]] = cosine;
|
|
m[indices[1]] = sine;
|
|
m[indices[2]] = -sine;
|
|
m[indices[3]] = cosine;
|
|
return m;
|
|
}
|
|
|
|
// m is a SkColorMatrix (i.e. a Float32Array), and this sets the 4 "special"
|
|
// params that will translate the colors after they are multiplied by the 4x4 matrix.
|
|
CanvasKit.SkColorMatrix.postTranslate = function(m, dr, dg, db, da) {
|
|
m[rPostTrans] += dr;
|
|
m[gPostTrans] += dg;
|
|
m[bPostTrans] += db;
|
|
m[aPostTrans] += da;
|
|
return m;
|
|
}
|
|
|
|
// concat returns a new SkColorMatrix that is the result of multiplying outer*inner;
|
|
CanvasKit.SkColorMatrix.concat = function(outer, inner) {
|
|
var m = new Float32Array(20);
|
|
var index = 0;
|
|
for (var j = 0; j < 20; j += 5) {
|
|
for (var i = 0; i < 4; i++) {
|
|
m[index++] = outer[j + 0] * inner[i + 0] +
|
|
outer[j + 1] * inner[i + 5] +
|
|
outer[j + 2] * inner[i + 10] +
|
|
outer[j + 3] * inner[i + 15];
|
|
}
|
|
m[index++] = outer[j + 0] * inner[4] +
|
|
outer[j + 1] * inner[9] +
|
|
outer[j + 2] * inner[14] +
|
|
outer[j + 3] * inner[19] +
|
|
outer[j + 4];
|
|
}
|
|
|
|
return m;
|
|
};
|
|
|
|
CanvasKit.SkPath.MakeFromCmds = function(cmds) {
|
|
var ptrLen = loadCmdsTypedArray(cmds);
|
|
var path = CanvasKit.SkPath._MakeFromCmds(ptrLen[0], ptrLen[1]);
|
|
CanvasKit._free(ptrLen[0]);
|
|
return path;
|
|
};
|
|
|
|
// Deprecated
|
|
CanvasKit.MakePathFromCmds = CanvasKit.SkPath.MakeFromCmds;
|
|
|
|
// The weights array is optional (only used for conics).
|
|
CanvasKit.SkPath.MakeFromVerbsPointsWeights = function(verbs, pts, weights) {
|
|
var verbsPtr = copy1dArray(verbs, "HEAPU8");
|
|
var pointsPtr = copy1dArray(pts, "HEAPF32");
|
|
var weightsPtr = copy1dArray(weights, "HEAPF32");
|
|
var numWeights = (weights && weights.length) || 0;
|
|
var path = CanvasKit.SkPath._MakeFromVerbsPointsWeights(
|
|
verbsPtr, verbs.length, pointsPtr, pts.length, weightsPtr, numWeights);
|
|
freeArraysThatAreNotMallocedByUsers(verbsPtr, verbs);
|
|
freeArraysThatAreNotMallocedByUsers(pointsPtr, pts);
|
|
freeArraysThatAreNotMallocedByUsers(weightsPtr, weights);
|
|
return path;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.addArc = function(oval, startAngle, sweepAngle) {
|
|
// see arc() for the HTMLCanvas version
|
|
// note input angles are degrees.
|
|
this._addArc(oval, startAngle, sweepAngle);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.addOval = function(oval, isCCW, startIndex) {
|
|
if (startIndex === undefined) {
|
|
startIndex = 1;
|
|
}
|
|
this._addOval(oval, !!isCCW, startIndex);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.addPath = function() {
|
|
// Takes 1, 2, 7, or 10 required args, where the first arg is always the path.
|
|
// The last arg is optional and chooses between add or extend mode.
|
|
// The options for the remaining args are:
|
|
// - an array of 6 or 9 parameters (perspective is optional)
|
|
// - the 9 parameters of a full matrix or
|
|
// the 6 non-perspective params of a matrix.
|
|
var args = Array.prototype.slice.call(arguments);
|
|
var path = args[0];
|
|
var extend = false;
|
|
if (typeof args[args.length-1] === "boolean") {
|
|
extend = args.pop();
|
|
}
|
|
if (args.length === 1) {
|
|
// Add path, unchanged. Use identity matrix
|
|
this._addPath(path, 1, 0, 0,
|
|
0, 1, 0,
|
|
0, 0, 1,
|
|
extend);
|
|
} else if (args.length === 2) {
|
|
// User provided the 9 params of a full matrix as an array.
|
|
var a = args[1];
|
|
this._addPath(path, a[0], a[1], a[2],
|
|
a[3], a[4], a[5],
|
|
a[6] || 0, a[7] || 0, a[8] || 1,
|
|
extend);
|
|
} else if (args.length === 7 || args.length === 10) {
|
|
// User provided the 9 params of a (full) matrix directly.
|
|
// (or just the 6 non perspective ones)
|
|
// These are in the same order as what Skia expects.
|
|
var a = args;
|
|
this._addPath(path, a[1], a[2], a[3],
|
|
a[4], a[5], a[6],
|
|
a[7] || 0, a[8] || 0, a[9] || 1,
|
|
extend);
|
|
} else {
|
|
SkDebug('addPath expected to take 1, 2, 7, or 10 required args. Got ' + args.length);
|
|
return null;
|
|
}
|
|
return this;
|
|
};
|
|
|
|
// points is either an array of [x, y] where x and y are numbers or
|
|
// a typed array from Malloc where the even indices will be treated
|
|
// as x coordinates and the odd indices will be treated as y coordinates.
|
|
CanvasKit.SkPath.prototype.addPoly = function(points, close) {
|
|
var ptr;
|
|
var n;
|
|
// This was created with CanvasKit.Malloc, so assume the user has
|
|
// already been filled with data.
|
|
if (points['_ck']) {
|
|
ptr = points.byteOffset;
|
|
n = points.length/2;
|
|
} else {
|
|
ptr = copy2dArray(points, "HEAPF32");
|
|
n = points.length;
|
|
}
|
|
this._addPoly(ptr, n, close);
|
|
freeArraysThatAreNotMallocedByUsers(ptr, points);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.addRect = function() {
|
|
// Takes 1, 2, 4 or 5 args
|
|
// - SkRect
|
|
// - SkRect, isCCW
|
|
// - left, top, right, bottom
|
|
// - left, top, right, bottom, isCCW
|
|
if (arguments.length === 1 || arguments.length === 2) {
|
|
var r = arguments[0];
|
|
var ccw = arguments[1] || false;
|
|
this._addRect(r.fLeft, r.fTop, r.fRight, r.fBottom, ccw);
|
|
} else if (arguments.length === 4 || arguments.length === 5) {
|
|
var a = arguments;
|
|
this._addRect(a[0], a[1], a[2], a[3], a[4] || false);
|
|
} else {
|
|
SkDebug('addRect expected to take 1, 2, 4, or 5 args. Got ' + arguments.length);
|
|
return null;
|
|
}
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.addRoundRect = function() {
|
|
// Takes 3, 4, 6 or 7 args
|
|
// - SkRect, radii (an array of 8 numbers), ccw
|
|
// - SkRect, rx, ry, ccw
|
|
// - left, top, right, bottom, radii, ccw
|
|
// - left, top, right, bottom, rx, ry, ccw
|
|
var args = arguments;
|
|
if (args.length === 3 || args.length === 6) {
|
|
var radii = args[args.length-2];
|
|
} else if (args.length === 4 || args.length === 7){
|
|
// duplicate the given (rx, ry) pairs for each corner.
|
|
var rx = args[args.length-3];
|
|
var ry = args[args.length-2];
|
|
var radii = [rx, ry, rx, ry, rx, ry, rx, ry];
|
|
} else {
|
|
SkDebug('addRoundRect expected to take 3, 4, 6, or 7 args. Got ' + args.length);
|
|
return null;
|
|
}
|
|
if (radii.length !== 8) {
|
|
SkDebug('addRoundRect needs 8 radii provided. Got ' + radii.length);
|
|
return null;
|
|
}
|
|
var rptr = copy1dArray(radii, "HEAPF32");
|
|
if (args.length === 3 || args.length === 4) {
|
|
var r = args[0];
|
|
var ccw = args[args.length - 1];
|
|
this._addRoundRect(r.fLeft, r.fTop, r.fRight, r.fBottom, rptr, ccw);
|
|
} else if (args.length === 6 || args.length === 7) {
|
|
var a = args;
|
|
this._addRoundRect(a[0], a[1], a[2], a[3], rptr, ccw);
|
|
}
|
|
freeArraysThatAreNotMallocedByUsers(rptr, radii);
|
|
return this;
|
|
};
|
|
|
|
// The weights array is optional (only used for conics).
|
|
CanvasKit.SkPath.prototype.addVerbsPointsWeights = function(verbs, points, weights) {
|
|
var verbsPtr = copy1dArray(verbs, "HEAPU8");
|
|
var pointsPtr = copy1dArray(points, "HEAPF32");
|
|
var weightsPtr = copy1dArray(weights, "HEAPF32");
|
|
var numWeights = (weights && weights.length) || 0;
|
|
this._addVerbsPointsWeights(verbsPtr, verbs.length, pointsPtr, points.length,
|
|
weightsPtr, numWeights);
|
|
freeArraysThatAreNotMallocedByUsers(verbsPtr, verbs);
|
|
freeArraysThatAreNotMallocedByUsers(pointsPtr, points);
|
|
freeArraysThatAreNotMallocedByUsers(weightsPtr, weights);
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.arc = function(x, y, radius, startAngle, endAngle, ccw) {
|
|
// emulates the HTMLCanvas behavior. See addArc() for the SkPath version.
|
|
// Note input angles are radians.
|
|
var bounds = CanvasKit.LTRBRect(x-radius, y-radius, x+radius, y+radius);
|
|
var sweep = radiansToDegrees(endAngle - startAngle) - (360 * !!ccw);
|
|
var temp = new CanvasKit.SkPath();
|
|
temp.addArc(bounds, radiansToDegrees(startAngle), sweep);
|
|
this.addPath(temp, true);
|
|
temp.delete();
|
|
return this;
|
|
};
|
|
|
|
// Deprecated, use one of the three variants below depending on how many args you were calling it with.
|
|
CanvasKit.SkPath.prototype.arcTo = function() {
|
|
// takes 4, 5 or 7 args
|
|
// - 5 x1, y1, x2, y2, radius
|
|
// - 4 oval (as Rect), startAngle, sweepAngle, forceMoveTo
|
|
// - 7 rx, ry, xAxisRotate, useSmallArc, isCCW, x, y
|
|
var args = arguments;
|
|
if (args.length === 5) {
|
|
this._arcToTangent(args[0], args[1], args[2], args[3], args[4]);
|
|
} else if (args.length === 4) {
|
|
this._arcToOval(args[0], args[1], args[2], args[3]);
|
|
} else if (args.length === 7) {
|
|
this._arcToRotated(args[0], args[1], args[2], !!args[3], !!args[4], args[5], args[6]);
|
|
} else {
|
|
throw 'Invalid args for arcTo. Expected 4, 5, or 7, got '+ args.length;
|
|
}
|
|
|
|
return this;
|
|
};
|
|
|
|
// Appends arc to SkPath. Arc added is part of ellipse
|
|
// bounded by oval, from startAngle through sweepAngle. Both startAngle and
|
|
// sweepAngle are measured in degrees, where zero degrees is aligned with the
|
|
// positive x-axis, and positive sweeps extends arc clockwise.
|
|
CanvasKit.SkPath.prototype.arcToOval = function(oval, startAngle, sweepAngle, forceMoveTo) {
|
|
this._arcToOval(oval, startAngle, sweepAngle, forceMoveTo);
|
|
return this;
|
|
};
|
|
|
|
// Appends arc to SkPath. Arc is implemented by one or more conics weighted to
|
|
// describe part of oval with radii (rx, ry) rotated by xAxisRotate degrees. Arc
|
|
// curves from last SkPath SkPoint to (x, y), choosing one of four possible routes:
|
|
// clockwise or counterclockwise, and smaller or larger.
|
|
|
|
// Arc sweep is always less than 360 degrees. arcTo() appends line to (x, y) if
|
|
// either radii are zero, or if last SkPath SkPoint equals (x, y). arcTo() scales radii
|
|
// (rx, ry) to fit last SkPath SkPoint and (x, y) if both are greater than zero but
|
|
// too small.
|
|
|
|
// arcToRotated() appends up to four conic curves.
|
|
// arcToRotated() implements the functionality of SVG arc, although SVG sweep-flag value
|
|
// is opposite the integer value of sweep; SVG sweep-flag uses 1 for clockwise,
|
|
// while kCW_Direction cast to int is zero.
|
|
CanvasKit.SkPath.prototype.arcToRotated = function(rx, ry, xAxisRotate, useSmallArc, isCCW, x, y) {
|
|
this._arcToRotated(rx, ry, xAxisRotate, !!useSmallArc, !!isCCW, x, y);
|
|
return this;
|
|
};
|
|
|
|
// Appends arc to SkPath, after appending line if needed. Arc is implemented by conic
|
|
// weighted to describe part of circle. Arc is contained by tangent from
|
|
// last SkPath point to (x1, y1), and tangent from (x1, y1) to (x2, y2). Arc
|
|
// is part of circle sized to radius, positioned so it touches both tangent lines.
|
|
|
|
// If last Path Point does not start Arc, arcTo appends connecting Line to Path.
|
|
// The length of Vector from (x1, y1) to (x2, y2) does not affect Arc.
|
|
|
|
// Arc sweep is always less than 180 degrees. If radius is zero, or if
|
|
// tangents are nearly parallel, arcTo appends Line from last Path Point to (x1, y1).
|
|
|
|
// arcToTangent appends at most one Line and one conic.
|
|
// arcToTangent implements the functionality of PostScript arct and HTML Canvas arcTo.
|
|
CanvasKit.SkPath.prototype.arcToTangent = function(x1, y1, x2, y2, radius) {
|
|
this._arcToTangent(x1, y1, x2, y2, radius);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.close = function() {
|
|
this._close();
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.conicTo = function(x1, y1, x2, y2, w) {
|
|
this._conicTo(x1, y1, x2, y2, w);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.cubicTo = function(cp1x, cp1y, cp2x, cp2y, x, y) {
|
|
this._cubicTo(cp1x, cp1y, cp2x, cp2y, x, y);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.dash = function(on, off, phase) {
|
|
if (this._dash(on, off, phase)) {
|
|
return this;
|
|
}
|
|
return null;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.lineTo = function(x, y) {
|
|
this._lineTo(x, y);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.moveTo = function(x, y) {
|
|
this._moveTo(x, y);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.offset = function(dx, dy) {
|
|
this._transform(1, 0, dx,
|
|
0, 1, dy,
|
|
0, 0, 1);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.quadTo = function(cpx, cpy, x, y) {
|
|
this._quadTo(cpx, cpy, x, y);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.rArcTo = function(rx, ry, xAxisRotate, useSmallArc, isCCW, dx, dy) {
|
|
this._rArcTo(rx, ry, xAxisRotate, useSmallArc, isCCW, dx, dy);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.rConicTo = function(dx1, dy1, dx2, dy2, w) {
|
|
this._rConicTo(dx1, dy1, dx2, dy2, w);
|
|
return this;
|
|
};
|
|
|
|
// These params are all relative
|
|
CanvasKit.SkPath.prototype.rCubicTo = function(cp1x, cp1y, cp2x, cp2y, x, y) {
|
|
this._rCubicTo(cp1x, cp1y, cp2x, cp2y, x, y);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.rLineTo = function(dx, dy) {
|
|
this._rLineTo(dx, dy);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.rMoveTo = function(dx, dy) {
|
|
this._rMoveTo(dx, dy);
|
|
return this;
|
|
};
|
|
|
|
// These params are all relative
|
|
CanvasKit.SkPath.prototype.rQuadTo = function(cpx, cpy, x, y) {
|
|
this._rQuadTo(cpx, cpy, x, y);
|
|
return this;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.stroke = function(opts) {
|
|
// Fill out any missing values with the default values.
|
|
opts = opts || {};
|
|
opts['width'] = opts['width'] || 1;
|
|
opts['miter_limit'] = opts['miter_limit'] || 4;
|
|
opts['cap'] = opts['cap'] || CanvasKit.StrokeCap.Butt;
|
|
opts['join'] = opts['join'] || CanvasKit.StrokeJoin.Miter;
|
|
opts['precision'] = opts['precision'] || 1;
|
|
if (this._stroke(opts)) {
|
|
return this;
|
|
}
|
|
return null;
|
|
};
|
|
|
|
CanvasKit.SkPath.prototype.transform = function() {
|
|
// Takes 1 or 9 args
|
|
if (arguments.length === 1) {
|
|
// argument 1 should be a 6 or 9 element array.
|
|
var a = arguments[0];
|
|
this._transform(a[0], a[1], a[2],
|
|
a[3], a[4], a[5],
|
|
a[6] || 0, a[7] || 0, a[8] || 1);
|
|
} else if (arguments.length === 6 || arguments.length === 9) {
|
|
// these arguments are the 6 or 9 members of the matrix
|
|
var a = arguments;
|
|
this._transform(a[0], a[1], a[2],
|
|
a[3], a[4], a[5],
|
|
a[6] || 0, a[7] || 0, a[8] || 1);
|
|
} else {
|
|
throw 'transform expected to take 1 or 9 arguments. Got ' + arguments.length;
|
|
}
|
|
return this;
|
|
};
|
|
// isComplement is optional, defaults to false
|
|
CanvasKit.SkPath.prototype.trim = function(startT, stopT, isComplement) {
|
|
if (this._trim(startT, stopT, !!isComplement)) {
|
|
return this;
|
|
}
|
|
return null;
|
|
};
|
|
|
|
CanvasKit.SkImage.prototype.encodeToData = function() {
|
|
if (!arguments.length) {
|
|
return this._encodeToData();
|
|
}
|
|
|
|
if (arguments.length === 2) {
|
|
var a = arguments;
|
|
return this._encodeToDataWithFormat(a[0], a[1]);
|
|
}
|
|
|
|
throw 'encodeToData expected to take 0 or 2 arguments. Got ' + arguments.length;
|
|
}
|
|
|
|
CanvasKit.SkImage.prototype.makeShader = function(xTileMode, yTileMode, localMatrix) {
|
|
var localMatrixPtr = copy3x3MatrixToWasm(localMatrix);
|
|
return this._makeShader(xTileMode, yTileMode, localMatrixPtr);
|
|
}
|
|
|
|
CanvasKit.SkImage.prototype.readPixels = function(imageInfo, srcX, srcY) {
|
|
var rowBytes;
|
|
// Important to use ["string"] notation here, otherwise the closure compiler will
|
|
// minify away the colorType.
|
|
switch (imageInfo["colorType"]) {
|
|
case CanvasKit.ColorType.RGBA_8888:
|
|
rowBytes = imageInfo.width * 4; // 1 byte per channel == 4 bytes per pixel in 8888
|
|
break;
|
|
case CanvasKit.ColorType.RGBA_F32:
|
|
rowBytes = imageInfo.width * 16; // 4 bytes per channel == 16 bytes per pixel in F32
|
|
break;
|
|
default:
|
|
SkDebug("Colortype not yet supported");
|
|
return;
|
|
}
|
|
var pBytes = rowBytes * imageInfo.height;
|
|
var pPtr = CanvasKit._malloc(pBytes);
|
|
|
|
if (!this._readPixels(imageInfo, pPtr, rowBytes, srcX, srcY)) {
|
|
SkDebug("Could not read pixels with the given inputs");
|
|
return null;
|
|
}
|
|
|
|
// Put those pixels into a typed array of the right format and then
|
|
// make a copy with slice() that we can return.
|
|
var retVal = null;
|
|
switch (imageInfo["colorType"]) {
|
|
case CanvasKit.ColorType.RGBA_8888:
|
|
retVal = new Uint8Array(CanvasKit.HEAPU8.buffer, pPtr, pBytes).slice();
|
|
break;
|
|
case CanvasKit.ColorType.RGBA_F32:
|
|
retVal = new Float32Array(CanvasKit.HEAPU8.buffer, pPtr, pBytes).slice();
|
|
break;
|
|
}
|
|
|
|
// Free the allocated pixels in the WASM memory
|
|
CanvasKit._free(pPtr);
|
|
return retVal;
|
|
}
|
|
|
|
// Accepts an array of four numbers in the range of 0-1 representing a 4f color
|
|
CanvasKit.SkCanvas.prototype.clear = function (color4f) {
|
|
var cPtr = copyColorToWasm(color4f);
|
|
this._clear(cPtr);
|
|
}
|
|
|
|
// concat takes a 3x2, a 3x3, or a 4x4 matrix and upscales it (if needed) to 4x4. This is because
|
|
// under the hood, SkCanvas uses a 4x4 matrix.
|
|
CanvasKit.SkCanvas.prototype.concat = function(matr) {
|
|
var matrPtr = copy4x4MatrixToWasm(matr);
|
|
this._concat(matrPtr);
|
|
}
|
|
|
|
// Deprecated - just use concat
|
|
CanvasKit.SkCanvas.prototype.concat44 = CanvasKit.SkCanvas.prototype.concat;
|
|
|
|
// atlas is an SkImage, e.g. from CanvasKit.MakeImageFromEncoded
|
|
// srcRects, dstXforms, and colors should be CanvasKit.SkRectBuilder, CanvasKit.RSXFormBuilder,
|
|
// and CanvasKit.SkColorBuilder (fastest)
|
|
// Or they can be an array of floats of length 4*number of destinations.
|
|
// colors are optional and used to tint the drawn images using the optional blend mode
|
|
// Colors may be an SkColorBuilder, a Uint32Array of int colors,
|
|
// a Flat Float32Array of float colors or a 2d Array of Float32Array(4) (deprecated)
|
|
CanvasKit.SkCanvas.prototype.drawAtlas = function(atlas, srcRects, dstXforms, paint,
|
|
/*optional*/ blendMode, colors) {
|
|
if (!atlas || !paint || !srcRects || !dstXforms) {
|
|
SkDebug('Doing nothing since missing a required input');
|
|
return;
|
|
}
|
|
|
|
// builder arguments report the length as the number of rects, but when passed as arrays
|
|
// their.length attribute is 4x higher because it's the number of total components of all rects.
|
|
// colors is always going to report the same length, at least until floats colors are supported
|
|
// by this function.
|
|
if (srcRects.length !== dstXforms.length) {
|
|
SkDebug('Doing nothing since input arrays length mismatches');
|
|
return;
|
|
}
|
|
if (!blendMode) {
|
|
blendMode = CanvasKit.BlendMode.SrcOver;
|
|
}
|
|
|
|
var srcRectPtr;
|
|
if (srcRects.build) {
|
|
srcRectPtr = srcRects.build();
|
|
} else {
|
|
srcRectPtr = copy1dArray(srcRects, "HEAPF32");
|
|
}
|
|
|
|
var count = 1;
|
|
var dstXformPtr;
|
|
if (dstXforms.build) {
|
|
dstXformPtr = dstXforms.build();
|
|
count = dstXforms.length;
|
|
} else {
|
|
dstXformPtr = copy1dArray(dstXforms, "HEAPF32");
|
|
count = dstXforms.length / 4;
|
|
}
|
|
|
|
var colorPtr = nullptr;
|
|
if (colors) {
|
|
if (colors.build) {
|
|
colorPtr = colors.build();
|
|
} else {
|
|
colorPtr = copy1dArray(assureIntColors(colors), "HEAPU32");
|
|
}
|
|
}
|
|
|
|
this._drawAtlas(atlas, dstXformPtr, srcRectPtr, colorPtr, count, blendMode, paint);
|
|
|
|
if (srcRectPtr && !srcRects.build) {
|
|
freeArraysThatAreNotMallocedByUsers(srcRectPtr, srcRects);
|
|
}
|
|
if (dstXformPtr && !dstXforms.build) {
|
|
freeArraysThatAreNotMallocedByUsers(dstXformPtr, dstXforms);
|
|
}
|
|
if (colorPtr && !colors.build) {
|
|
freeArraysThatAreNotMallocedByUsers(colorPtr, colors);
|
|
}
|
|
}
|
|
|
|
CanvasKit.SkCanvas.prototype.drawColor = function (color4f, mode) {
|
|
var cPtr = copyColorToWasm(color4f);
|
|
if (mode !== undefined) {
|
|
this._drawColor(cPtr, mode);
|
|
} else {
|
|
this._drawColor(cPtr);
|
|
}
|
|
}
|
|
|
|
CanvasKit.SkCanvas.prototype.drawColorComponents = function (r, g, b, a, mode) {
|
|
var cPtr = copyColorComponentsToWasm(r, g, b, a);
|
|
if (mode !== undefined) {
|
|
this._drawColor(cPtr, mode);
|
|
} else {
|
|
this._drawColor(cPtr);
|
|
}
|
|
}
|
|
|
|
// points is either an array of [x, y] where x and y are numbers or
|
|
// a typed array from Malloc where the even indices will be treated
|
|
// as x coordinates and the odd indices will be treated as y coordinates.
|
|
CanvasKit.SkCanvas.prototype.drawPoints = function(mode, points, paint) {
|
|
var ptr;
|
|
var n;
|
|
// This was created with CanvasKit.Malloc, so assume the user has
|
|
// already been filled with data.
|
|
if (points['_ck']) {
|
|
ptr = points.byteOffset;
|
|
n = points.length/2;
|
|
} else {
|
|
ptr = copy2dArray(points, "HEAPF32");
|
|
n = points.length;
|
|
}
|
|
this._drawPoints(mode, ptr, n, paint);
|
|
freeArraysThatAreNotMallocedByUsers(ptr, points);
|
|
}
|
|
|
|
CanvasKit.SkCanvas.prototype.drawShadow = function(path, zPlaneParams, lightPos, lightRadius, ambientColor, spotColor, flags) {
|
|
var ambiPtr = copyColorToWasmNoScratch(ambientColor);
|
|
var spotPtr = copyColorToWasmNoScratch(spotColor);
|
|
this._drawShadow(path, zPlaneParams, lightPos, lightRadius, ambiPtr, spotPtr, flags);
|
|
freeArraysThatAreNotMallocedByUsers(ambiPtr, ambientColor);
|
|
freeArraysThatAreNotMallocedByUsers(spotPtr, spotColor);
|
|
}
|
|
|
|
// getLocalToDevice returns a 4x4 matrix.
|
|
CanvasKit.SkCanvas.prototype.getLocalToDevice = function() {
|
|
// _getLocalToDevice will copy the values into the pointer.
|
|
this._getLocalToDevice(_scratch4x4MatrixPtr);
|
|
return copy4x4MatrixFromWasm(_scratch4x4MatrixPtr);
|
|
}
|
|
|
|
// findMarkedCTM returns a 4x4 matrix, or null if a matrix was not found at
|
|
// the provided marker.
|
|
CanvasKit.SkCanvas.prototype.findMarkedCTM = function(marker) {
|
|
// _getLocalToDevice will copy the values into the pointer.
|
|
var found = this._findMarkedCTM(marker, _scratch4x4MatrixPtr);
|
|
if (!found) {
|
|
return null;
|
|
}
|
|
return copy4x4MatrixFromWasm(_scratch4x4MatrixPtr);
|
|
}
|
|
|
|
// getTotalMatrix returns the current matrix as a 3x3 matrix.
|
|
CanvasKit.SkCanvas.prototype.getTotalMatrix = function() {
|
|
// _getTotalMatrix will copy the values into the pointer.
|
|
this._getTotalMatrix(_scratch3x3MatrixPtr);
|
|
// read them out into an array. TODO(kjlubick): If we change SkMatrix to be
|
|
// typedArrays, then we should return a typed array here too.
|
|
var rv = new Array(9);
|
|
for (var i = 0; i < 9; i++) {
|
|
rv[i] = CanvasKit.HEAPF32[_scratch3x3MatrixPtr/4 + i]; // divide by 4 to "cast" to float.
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
// returns Uint8Array
|
|
CanvasKit.SkCanvas.prototype.readPixels = function(x, y, w, h, alphaType,
|
|
colorType, colorSpace, dstRowBytes) {
|
|
// supply defaults (which are compatible with HTMLCanvas's getImageData)
|
|
alphaType = alphaType || CanvasKit.AlphaType.Unpremul;
|
|
colorType = colorType || CanvasKit.ColorType.RGBA_8888;
|
|
colorSpace = colorSpace || CanvasKit.SkColorSpace.SRGB;
|
|
var pixBytes = 4;
|
|
if (colorType === CanvasKit.ColorType.RGBA_F16) {
|
|
pixBytes = 8;
|
|
}
|
|
dstRowBytes = dstRowBytes || (pixBytes * w);
|
|
|
|
var len = h * dstRowBytes
|
|
var pptr = CanvasKit._malloc(len);
|
|
var ok = this._readPixels({
|
|
'width': w,
|
|
'height': h,
|
|
'colorType': colorType,
|
|
'alphaType': alphaType,
|
|
'colorSpace': colorSpace,
|
|
}, pptr, dstRowBytes, x, y);
|
|
if (!ok) {
|
|
CanvasKit._free(pptr);
|
|
return null;
|
|
}
|
|
|
|
// The first typed array is just a view into memory. Because we will
|
|
// be free-ing that, we call slice to make a persistent copy.
|
|
var pixels = new Uint8Array(CanvasKit.HEAPU8.buffer, pptr, len).slice();
|
|
CanvasKit._free(pptr);
|
|
return pixels;
|
|
}
|
|
|
|
// pixels should be a Uint8Array or a plain JS array.
|
|
CanvasKit.SkCanvas.prototype.writePixels = function(pixels, srcWidth, srcHeight,
|
|
destX, destY, alphaType, colorType, colorSpace) {
|
|
if (pixels.byteLength % (srcWidth * srcHeight)) {
|
|
throw 'pixels length must be a multiple of the srcWidth * srcHeight';
|
|
}
|
|
var bytesPerPixel = pixels.byteLength / (srcWidth * srcHeight);
|
|
// supply defaults (which are compatible with HTMLCanvas's putImageData)
|
|
alphaType = alphaType || CanvasKit.AlphaType.Unpremul;
|
|
colorType = colorType || CanvasKit.ColorType.RGBA_8888;
|
|
colorSpace = colorSpace || CanvasKit.SkColorSpace.SRGB;
|
|
var srcRowBytes = bytesPerPixel * srcWidth;
|
|
|
|
var pptr = copy1dArray(pixels, "HEAPU8");
|
|
var ok = this._writePixels({
|
|
'width': srcWidth,
|
|
'height': srcHeight,
|
|
'colorType': colorType,
|
|
'alphaType': alphaType,
|
|
'colorSpace': colorSpace,
|
|
}, pptr, srcRowBytes, destX, destY);
|
|
|
|
freeArraysThatAreNotMallocedByUsers(pptr, pixels);
|
|
return ok;
|
|
}
|
|
|
|
CanvasKit.SkColorFilter.MakeBlend = function(color4f, mode) {
|
|
var cPtr = copyColorToWasm(color4f);
|
|
var result = CanvasKit.SkColorFilter._MakeBlend(cPtr, mode);
|
|
return result;
|
|
}
|
|
|
|
// colorMatrix is an SkColorMatrix (e.g. Float32Array of length 20)
|
|
CanvasKit.SkColorFilter.MakeMatrix = function(colorMatrix) {
|
|
if (!colorMatrix || colorMatrix.length !== 20) {
|
|
throw 'invalid color matrix';
|
|
}
|
|
var fptr = copy1dArray(colorMatrix, "HEAPF32");
|
|
// We know skia memcopies the floats, so we can free our memory after the call returns.
|
|
var m = CanvasKit.SkColorFilter._makeMatrix(fptr);
|
|
freeArraysThatAreNotMallocedByUsers(fptr, colorMatrix);
|
|
return m;
|
|
}
|
|
|
|
CanvasKit.SkImageFilter.MakeMatrixTransform = function(matr, filterQuality, input) {
|
|
var matrPtr = copy3x3MatrixToWasm(matr);
|
|
return CanvasKit.SkImageFilter._MakeMatrixTransform(matrPtr, filterQuality, input);
|
|
}
|
|
|
|
CanvasKit.SkPaint.prototype.getColor = function() {
|
|
this._getColor(_scratchColorPtr);
|
|
return copyColorFromWasm(_scratchColorPtr);
|
|
}
|
|
|
|
CanvasKit.SkPaint.prototype.setColor = function(color4f, colorSpace) {
|
|
colorSpace = colorSpace || null; // null will be replaced with sRGB in the C++ method.
|
|
// emscripten wouldn't bind undefined to the sk_sp<SkColorSpace> expected here.
|
|
var cPtr = copyColorToWasm(color4f);
|
|
this._setColor(cPtr, colorSpace);
|
|
}
|
|
|
|
// The color components here are expected to be floating point values (nominally between
|
|
// 0.0 and 1.0, but with wider color gamuts, the values could exceed this range). To convert
|
|
// between standard 8 bit colors and floats, just divide by 255 before passing them in.
|
|
CanvasKit.SkPaint.prototype.setColorComponents = function(r, g, b, a, colorSpace) {
|
|
colorSpace = colorSpace || null; // null will be replaced with sRGB in the C++ method.
|
|
// emscripten wouldn't bind undefined to the sk_sp<SkColorSpace> expected here.
|
|
var cPtr = copyColorComponentsToWasm(r, g, b, a);
|
|
this._setColor(cPtr, colorSpace);
|
|
}
|
|
|
|
CanvasKit.SkSurface.prototype.captureFrameAsSkPicture = function(drawFrame) {
|
|
// Set up SkPictureRecorder
|
|
var spr = new CanvasKit.SkPictureRecorder();
|
|
var canvas = spr.beginRecording(
|
|
CanvasKit.LTRBRect(0, 0, this.width(), this.height()));
|
|
drawFrame(canvas);
|
|
var pic = spr.finishRecordingAsPicture();
|
|
spr.delete();
|
|
// TODO: do we need to clean up the memory for canvas?
|
|
// If we delete it here, saveAsFile doesn't work correctly.
|
|
return pic;
|
|
}
|
|
|
|
CanvasKit.SkSurface.prototype.requestAnimationFrame = function(callback, dirtyRect) {
|
|
if (!this._cached_canvas) {
|
|
this._cached_canvas = this.getCanvas();
|
|
}
|
|
window.requestAnimationFrame(function() {
|
|
if (this._context !== undefined) {
|
|
CanvasKit.setCurrentContext(this._context);
|
|
}
|
|
|
|
callback(this._cached_canvas);
|
|
|
|
// We do not dispose() of the SkSurface here, as the client will typically
|
|
// call requestAnimationFrame again from within the supplied callback.
|
|
// For drawing a single frame, prefer drawOnce().
|
|
this.flush(dirtyRect);
|
|
}.bind(this));
|
|
}
|
|
|
|
// drawOnce will dispose of the surface after drawing the frame using the provided
|
|
// callback.
|
|
CanvasKit.SkSurface.prototype.drawOnce = function(callback, dirtyRect) {
|
|
if (!this._cached_canvas) {
|
|
this._cached_canvas = this.getCanvas();
|
|
}
|
|
window.requestAnimationFrame(function() {
|
|
if (this._context !== undefined) {
|
|
CanvasKit.setCurrentContext(this._context);
|
|
}
|
|
callback(this._cached_canvas);
|
|
|
|
this.flush(dirtyRect);
|
|
this.dispose();
|
|
}.bind(this));
|
|
}
|
|
|
|
CanvasKit.SkPathEffect.MakeDash = 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, "HEAPF32");
|
|
var dpe = CanvasKit.SkPathEffect._MakeDash(ptr, intervals.length, phase);
|
|
freeArraysThatAreNotMallocedByUsers(ptr, intervals);
|
|
return dpe;
|
|
}
|
|
|
|
CanvasKit.SkShader.Color = function(color4f, colorSpace) {
|
|
colorSpace = colorSpace || null
|
|
var cPtr = copyColorToWasm(color4f);
|
|
var result = CanvasKit.SkShader._Color(cPtr, colorSpace);
|
|
return result;
|
|
}
|
|
|
|
CanvasKit.SkShader.MakeLinearGradient = function(start, end, colors, pos, mode, localMatrix, flags, colorSpace) {
|
|
colorSpace = colorSpace || null
|
|
var cPtrInfo = copyFlexibleColorArray(colors);
|
|
var posPtr = copy1dArray(pos, "HEAPF32");
|
|
flags = flags || 0;
|
|
var localMatrixPtr = copy3x3MatrixToWasm(localMatrix);
|
|
|
|
var lgs = CanvasKit._MakeLinearGradientShader(start, end, cPtrInfo.colorPtr, cPtrInfo.colorType, posPtr,
|
|
cPtrInfo.count, mode, flags, localMatrixPtr, colorSpace);
|
|
|
|
freeArraysThatAreNotMallocedByUsers(cPtrInfo.colorPtr, colors);
|
|
pos && freeArraysThatAreNotMallocedByUsers(posPtr, pos);
|
|
return lgs;
|
|
}
|
|
|
|
CanvasKit.SkShader.MakeRadialGradient = function(center, radius, colors, pos, mode, localMatrix, flags, colorSpace) {
|
|
colorSpace = colorSpace || null
|
|
var cPtrInfo = copyFlexibleColorArray(colors);
|
|
var posPtr = copy1dArray(pos, "HEAPF32");
|
|
flags = flags || 0;
|
|
var localMatrixPtr = copy3x3MatrixToWasm(localMatrix);
|
|
|
|
var rgs = CanvasKit._MakeRadialGradientShader(center, radius, cPtrInfo.colorPtr, cPtrInfo.colorType, posPtr,
|
|
cPtrInfo.count, mode, flags, localMatrixPtr, colorSpace);
|
|
|
|
freeArraysThatAreNotMallocedByUsers(cPtrInfo.colorPtr, colors);
|
|
pos && freeArraysThatAreNotMallocedByUsers(posPtr, pos);
|
|
return rgs;
|
|
}
|
|
|
|
CanvasKit.SkShader.MakeSweepGradient = function(cx, cy, colors, pos, mode, localMatrix, flags, startAngle, endAngle, colorSpace) {
|
|
colorSpace = colorSpace || null
|
|
var cPtrInfo = copyFlexibleColorArray(colors);
|
|
var posPtr = copy1dArray(pos, "HEAPF32");
|
|
flags = flags || 0;
|
|
startAngle = startAngle || 0;
|
|
endAngle = endAngle || 360;
|
|
var localMatrixPtr = copy3x3MatrixToWasm(localMatrix);
|
|
|
|
var sgs = CanvasKit._MakeSweepGradientShader(cx, cy, cPtrInfo.colorPtr, cPtrInfo.colorType, posPtr,
|
|
cPtrInfo.count, mode,
|
|
startAngle, endAngle, flags,
|
|
localMatrixPtr, colorSpace);
|
|
|
|
freeArraysThatAreNotMallocedByUsers(cPtrInfo.colorPtr, colors);
|
|
pos && freeArraysThatAreNotMallocedByUsers(posPtr, pos);
|
|
return sgs;
|
|
}
|
|
|
|
CanvasKit.SkShader.MakeTwoPointConicalGradient = function(start, startRadius, end, endRadius,
|
|
colors, pos, mode, localMatrix, flags, colorSpace) {
|
|
colorSpace = colorSpace || null
|
|
var cPtrInfo = copyFlexibleColorArray(colors);
|
|
var posPtr = copy1dArray(pos, "HEAPF32");
|
|
flags = flags || 0;
|
|
var localMatrixPtr = copy3x3MatrixToWasm(localMatrix);
|
|
|
|
var rgs = CanvasKit._MakeTwoPointConicalGradientShader(
|
|
start, startRadius, end, endRadius, cPtrInfo.colorPtr, cPtrInfo.colorType,
|
|
posPtr, cPtrInfo.count, mode, flags, localMatrixPtr, colorSpace);
|
|
|
|
freeArraysThatAreNotMallocedByUsers(cPtrInfo.colorPtr, colors);
|
|
pos && freeArraysThatAreNotMallocedByUsers(posPtr, pos);
|
|
return rgs;
|
|
}
|
|
|
|
// temporary support for deprecated names.
|
|
CanvasKit.MakeSkDashPathEffect = CanvasKit.SkPathEffect.MakeDash;
|
|
CanvasKit.MakeLinearGradientShader = CanvasKit.SkShader.MakeLinearGradient;
|
|
CanvasKit.MakeRadialGradientShader = CanvasKit.SkShader.MakeRadialGradient;
|
|
CanvasKit.MakeTwoPointConicalGradientShader = CanvasKit.SkShader.MakeTwoPointConicalGradient;
|
|
|
|
// 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.
|
|
|
|
// Accepts an object holding two canvaskit colors.
|
|
// {
|
|
// ambient: {r, g, b, a},
|
|
// spot: {r, g, b, a},
|
|
// }
|
|
// Returns the same format. Note, if malloced colors are passed in, the memory
|
|
// housing the passed in colors passed in will be overwritten with the computed
|
|
// tonal colors.
|
|
CanvasKit.computeTonalColors = function(tonalColors) {
|
|
// copy the colors into WASM
|
|
var cPtrAmbi = copyColorToWasmNoScratch(tonalColors['ambient']);
|
|
var cPtrSpot = copyColorToWasmNoScratch(tonalColors['spot']);
|
|
// The output of this function will be the same pointers we passed in.
|
|
this._computeTonalColors(cPtrAmbi, cPtrSpot);
|
|
// Read the results out.
|
|
var result = {
|
|
'ambient': copyColorFromWasm(cPtrAmbi),
|
|
'spot': copyColorFromWasm(cPtrSpot),
|
|
};
|
|
// If the user passed us malloced colors in here, we don't want to clean them up.
|
|
freeArraysThatAreNotMallocedByUsers(cPtrAmbi, tonalColors['ambient']);
|
|
freeArraysThatAreNotMallocedByUsers(cPtrSpot, tonalColors['spot']);
|
|
return result;
|
|
};
|
|
|
|
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,
|
|
};
|
|
};
|
|
|
|
// RRectXY returns an RRect with the given rect and a radiusX and radiusY for
|
|
// all 4 corners.
|
|
CanvasKit.RRectXY = function(rect, rx, ry) {
|
|
return {
|
|
rect: rect,
|
|
rx1: rx,
|
|
ry1: ry,
|
|
rx2: rx,
|
|
ry2: ry,
|
|
rx3: rx,
|
|
ry3: ry,
|
|
rx4: rx,
|
|
ry4: ry,
|
|
};
|
|
};
|
|
|
|
// data is a TypedArray or ArrayBuffer e.g. from fetch().then(resp.arrayBuffer())
|
|
CanvasKit.MakeAnimatedImageFromEncoded = function(data) {
|
|
data = new Uint8Array(data);
|
|
|
|
var iptr = CanvasKit._malloc(data.byteLength);
|
|
CanvasKit.HEAPU8.set(data, iptr);
|
|
var img = CanvasKit._decodeAnimatedImage(iptr, data.byteLength);
|
|
if (!img) {
|
|
SkDebug('Could not decode animated image');
|
|
return null;
|
|
}
|
|
return img;
|
|
}
|
|
|
|
// 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');
|
|
return null;
|
|
}
|
|
return img;
|
|
}
|
|
|
|
// A variable to hold a canvasElement which can be reused once created the first time.
|
|
var memoizedCanvas2dElement = null;
|
|
|
|
// Alternative to CanvasKit.MakeImageFromEncoded. Allows for CanvasKit users to take advantage of
|
|
// browser APIs to decode images instead of using codecs included in the CanvasKit wasm binary.
|
|
// Expects that the canvasImageSource has already loaded/decoded.
|
|
// CanvasImageSource reference: https://developer.mozilla.org/en-US/docs/Web/API/CanvasImageSource
|
|
CanvasKit.MakeImageFromCanvasImageSource = function(canvasImageSource) {
|
|
var width = canvasImageSource.width;
|
|
var height = canvasImageSource.height;
|
|
|
|
if (!memoizedCanvas2dElement) {
|
|
memoizedCanvas2dElement = document.createElement('canvas');
|
|
}
|
|
memoizedCanvas2dElement.width = width;
|
|
memoizedCanvas2dElement.height = height;
|
|
|
|
var ctx2d = memoizedCanvas2dElement.getContext('2d');
|
|
ctx2d.drawImage(canvasImageSource, 0, 0);
|
|
|
|
var imageData = ctx2d.getImageData(0, 0, width, height);
|
|
|
|
return CanvasKit.MakeImage(
|
|
imageData.data,
|
|
width,
|
|
height,
|
|
CanvasKit.AlphaType.Unpremul,
|
|
CanvasKit.ColorType.RGBA_8888,
|
|
CanvasKit.SkColorSpace.SRGB
|
|
);
|
|
}
|
|
|
|
// pixels may be any Typed Array, but Uint8Array or Uint8ClampedArray is recommended,
|
|
// with bytes representing the pixel values.
|
|
// (e.g. each set of 4 bytes could represent RGBA values for a single pixel).
|
|
CanvasKit.MakeImage = function(pixels, width, height, alphaType, colorType, colorSpace) {
|
|
var bytesPerPixel = pixels.length / (width * height);
|
|
var info = {
|
|
'width': width,
|
|
'height': height,
|
|
'alphaType': alphaType,
|
|
'colorType': colorType,
|
|
'colorSpace': colorSpace,
|
|
};
|
|
var pptr = copy1dArray(pixels, "HEAPU8");
|
|
// No need to _free pptr, Image takes it with SkData::MakeFromMalloc
|
|
|
|
return CanvasKit._MakeImage(info, pptr, pixels.length, width * bytesPerPixel);
|
|
}
|
|
|
|
// Colors may be a Uint32Array of int colors, a Flat Float32Array of float colors
|
|
// or a 2d Array of Float32Array(4) (deprecated)
|
|
// the underlying skia function accepts only int colors so it is recommended
|
|
// to pass an array of int colors to avoid an extra conversion.
|
|
// SkColorBuilder is not accepted.
|
|
CanvasKit.MakeSkVertices = function(mode, positions, textureCoordinates, colors,
|
|
indices, isVolatile) {
|
|
// Default isVolitile to true if not set
|
|
isVolatile = isVolatile === undefined ? true : isVolatile;
|
|
var idxCount = (indices && indices.length) || 0;
|
|
|
|
var flags = 0;
|
|
// These flags are from SkVertices.h and should be kept in sync with those.
|
|
if (textureCoordinates && textureCoordinates.length) {
|
|
flags |= (1 << 0);
|
|
}
|
|
if (colors && colors.length) {
|
|
flags |= (1 << 1);
|
|
}
|
|
if (!isVolatile) {
|
|
flags |= (1 << 2);
|
|
}
|
|
|
|
var builder = new CanvasKit._SkVerticesBuilder(mode, positions.length, idxCount, flags);
|
|
|
|
copy2dArray(positions, "HEAPF32", builder.positions());
|
|
if (builder.texCoords()) {
|
|
copy2dArray(textureCoordinates, "HEAPF32", builder.texCoords());
|
|
}
|
|
if (builder.colors()) {
|
|
if (colors.build) {
|
|
throw('Color builder not accepted by MakeSkVertices, use array of ints');
|
|
} else {
|
|
copy1dArray(assureIntColors(colors), "HEAPU32", builder.colors());
|
|
}
|
|
}
|
|
if (builder.indices()) {
|
|
copy1dArray(indices, "HEAPU16", builder.indices());
|
|
}
|
|
|
|
// Create the vertices, which owns the memory that the builder had allocated.
|
|
return builder.detach();
|
|
};
|