| // Adds JS functions to augment the CanvasKit interface. |
| // For example, if there is a wrapper around the C++ call or logic to allow |
| // chaining, it should go here. |
| |
| // CanvasKit.onRuntimeInitialized is called after the WASM library has loaded. |
| // Anything that modifies an exposed class (e.g. Path) should be set |
| // after onRuntimeInitialized, otherwise, it can happen outside of that scope. |
| CanvasKit.onRuntimeInitialized = function() { |
| // All calls to 'this' need to go in externs.js so closure doesn't minify them away. |
| |
| _scratchColor = CanvasKit.Malloc(Float32Array, 4); // 4 color scalars. |
| _scratchColorPtr = _scratchColor['byteOffset']; |
| |
| _scratch4x4Matrix = CanvasKit.Malloc(Float32Array, 16); // 16 matrix scalars. |
| _scratch4x4MatrixPtr = _scratch4x4Matrix['byteOffset']; |
| |
| _scratch3x3Matrix = CanvasKit.Malloc(Float32Array, 9); // 9 matrix scalars. |
| _scratch3x3MatrixPtr = _scratch3x3Matrix['byteOffset']; |
| |
| _scratchRRect = CanvasKit.Malloc(Float32Array, 12); // 4 scalars for rrect, 8 for radii. |
| _scratchRRectPtr = _scratchRRect['byteOffset']; |
| |
| _scratchRRect2 = CanvasKit.Malloc(Float32Array, 12); // 4 scalars for rrect, 8 for radii. |
| _scratchRRect2Ptr = _scratchRRect2['byteOffset']; |
| |
| _scratchRect = CanvasKit.Malloc(Float32Array, 4); |
| _scratchRectPtr = _scratchRect['byteOffset']; |
| |
| _scratchRect2 = CanvasKit.Malloc(Float32Array, 4); |
| _scratchRect2Ptr = _scratchRect2['byteOffset']; |
| |
| _scratchIRect = CanvasKit.Malloc(Int32Array, 4); |
| _scratchIRectPtr = _scratchIRect['byteOffset']; |
| |
| // Create single copies of all three supported color spaces |
| // These are sk_sp<ColorSpace> |
| CanvasKit.ColorSpace.SRGB = CanvasKit.ColorSpace._MakeSRGB(); |
| CanvasKit.ColorSpace.DISPLAY_P3 = CanvasKit.ColorSpace._MakeDisplayP3(); |
| CanvasKit.ColorSpace.ADOBE_RGB = CanvasKit.ColorSpace._MakeAdobeRGB(); |
| |
| // Add some helpers for matrices. This is ported from SkMatrix.cpp |
| // to save complexity and overhead of going back and forth between |
| // C++ and JS layers. |
| // I would have liked to use something like DOMMatrix, except it |
| // isn't widely supported (would need polyfills) and it doesn't |
| // have a mapPoints() function (which could maybe be tacked on here). |
| // If DOMMatrix catches on, it would be worth re-considering this usage. |
| CanvasKit.Matrix = {}; |
| function sdot() { // to be called with an even number of scalar args |
| var acc = 0; |
| for (var i=0; i < arguments.length-1; i+=2) { |
| acc += arguments[i] * arguments[i+1]; |
| } |
| return acc; |
| } |
| |
| |
| // Private general matrix functions used in both 3x3s and 4x4s. |
| // Return a square identity matrix of size n. |
| var identityN = function(n) { |
| var size = n*n; |
| var m = new Array(size); |
| while(size--) { |
| m[size] = size%(n+1) == 0 ? 1.0 : 0.0; |
| } |
| return m; |
| }; |
| |
| // Stride, a function for compactly representing several ways of copying an array into another. |
| // Write vector `v` into matrix `m`. `m` is a matrix encoded as an array in row-major |
| // order. Its width is passed as `width`. `v` is an array with length < (m.length/width). |
| // An element of `v` is copied into `m` starting at `offset` and moving `colStride` cols right |
| // each row. |
| // |
| // For example, a width of 4, offset of 3, and stride of -1 would put the vector here. |
| // _ _ 0 _ |
| // _ 1 _ _ |
| // 2 _ _ _ |
| // _ _ _ 3 |
| // |
| var stride = function(v, m, width, offset, colStride) { |
| for (var i=0; i<v.length; i++) { |
| m[i * width + // column |
| (i * colStride + offset + width) % width // row |
| ] = v[i]; |
| } |
| return m; |
| }; |
| |
| CanvasKit.Matrix.identity = function() { |
| return identityN(3); |
| }; |
| |
| // Return the inverse (if it exists) of this matrix. |
| // Otherwise, return null. |
| CanvasKit.Matrix.invert = function(m) { |
| // Find the determinant by the sarrus rule. https://en.wikipedia.org/wiki/Rule_of_Sarrus |
| var det = m[0]*m[4]*m[8] + m[1]*m[5]*m[6] + m[2]*m[3]*m[7] |
| - m[2]*m[4]*m[6] - m[1]*m[3]*m[8] - m[0]*m[5]*m[7]; |
| if (!det) { |
| Debug('Warning, uninvertible matrix'); |
| return null; |
| } |
| // Return the inverse by the formula adj(m)/det. |
| // adj (adjugate) of a 3x3 is the transpose of it's cofactor matrix. |
| // a cofactor matrix is a matrix where each term is +-det(N) where matrix N is the 2x2 formed |
| // by removing the row and column we're currently setting from the source. |
| // the sign alternates in a checkerboard pattern with a `+` at the top left. |
| // that's all been combined here into one expression. |
| return [ |
| (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, |
| (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, |
| (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, |
| ]; |
| }; |
| |
| // Maps the given points according to the passed in matrix. |
| // Results are done in place. |
| // See SkMatrix.h::mapPoints for the docs on the math. |
| CanvasKit.Matrix.mapPoints = function(matrix, ptArr) { |
| if (IsDebug && (ptArr.length % 2)) { |
| throw 'mapPoints requires an even length arr'; |
| } |
| for (var i = 0; i < ptArr.length; i+=2) { |
| var x = ptArr[i], y = ptArr[i+1]; |
| // Gx+Hy+I |
| var denom = matrix[6]*x + matrix[7]*y + matrix[8]; |
| // Ax+By+C |
| var xTrans = matrix[0]*x + matrix[1]*y + matrix[2]; |
| // Dx+Ey+F |
| var yTrans = matrix[3]*x + matrix[4]*y + matrix[5]; |
| ptArr[i] = xTrans/denom; |
| ptArr[i+1] = yTrans/denom; |
| } |
| return ptArr; |
| }; |
| |
| function isnumber(val) { return !isNaN(val); } |
| |
| // generalized iterative algorithm for multiplying two matrices. |
| function multiply(m1, m2, size) { |
| |
| if (IsDebug && (!m1.every(isnumber) || !m2.every(isnumber))) { |
| throw 'Some members of matrices are NaN m1='+m1+', m2='+m2+''; |
| } |
| if (IsDebug && (m1.length !== m2.length)) { |
| throw 'Undefined for matrices of different sizes. m1.length='+m1.length+', m2.length='+m2.length; |
| } |
| if (IsDebug && (size*size !== m1.length)) { |
| throw 'Undefined for non-square matrices. array size was '+size; |
| } |
| |
| var result = Array(m1.length); |
| for (var r = 0; r < size; r++) { |
| for (var c = 0; c < size; c++) { |
| // accumulate a sum of m1[r,k]*m2[k, c] |
| var acc = 0; |
| for (var k = 0; k < size; k++) { |
| acc += m1[size * r + k] * m2[size * k + c]; |
| } |
| result[r * size + c] = acc; |
| } |
| } |
| return result; |
| } |
| |
| // Accept an integer indicating the size of the matrices being multiplied (3 for 3x3), and any |
| // number of matrices following it. |
| function multiplyMany(size, listOfMatrices) { |
| if (IsDebug && (listOfMatrices.length < 2)) { |
| throw 'multiplication expected two or more matrices'; |
| } |
| var result = multiply(listOfMatrices[0], listOfMatrices[1], size); |
| var next = 2; |
| while (next < listOfMatrices.length) { |
| result = multiply(result, listOfMatrices[next], size); |
| next++; |
| } |
| return result; |
| } |
| |
| // Accept any number 3x3 of matrices as arguments, multiply them together. |
| // Matrix multiplication is associative but not commutative. the order of the arguments |
| // matters, but it does not matter that this implementation multiplies them left to right. |
| CanvasKit.Matrix.multiply = function() { |
| return multiplyMany(3, arguments); |
| }; |
| |
| // Return a matrix representing a rotation by n radians. |
| // px, py optionally say which point the rotation should be around |
| // with the default being (0, 0); |
| CanvasKit.Matrix.rotated = function(radians, px, py) { |
| px = px || 0; |
| py = py || 0; |
| var sinV = Math.sin(radians); |
| var cosV = Math.cos(radians); |
| return [ |
| cosV, -sinV, sdot( sinV, py, 1 - cosV, px), |
| sinV, cosV, sdot(-sinV, px, 1 - cosV, py), |
| 0, 0, 1, |
| ]; |
| }; |
| |
| CanvasKit.Matrix.scaled = function(sx, sy, px, py) { |
| px = px || 0; |
| py = py || 0; |
| var m = stride([sx, sy], identityN(3), 3, 0, 1); |
| return stride([px-sx*px, py-sy*py], m, 3, 2, 0); |
| }; |
| |
| CanvasKit.Matrix.skewed = function(kx, ky, px, py) { |
| px = px || 0; |
| py = py || 0; |
| var m = stride([kx, ky], identityN(3), 3, 1, -1); |
| return stride([-kx*px, -ky*py], m, 3, 2, 0); |
| }; |
| |
| CanvasKit.Matrix.translated = function(dx, dy) { |
| return stride(arguments, identityN(3), 3, 2, 0); |
| }; |
| |
| // Functions for manipulating vectors. |
| // Loosely based off of SkV3 in SkM44.h but skia also has SkVec2 and Skv4. This combines them and |
| // works on vectors of any length. |
| CanvasKit.Vector = {}; |
| CanvasKit.Vector.dot = function(a, b) { |
| if (IsDebug && (a.length !== b.length)) { |
| throw 'Cannot perform dot product on arrays of different length ('+a.length+' vs '+b.length+')'; |
| } |
| return a.map(function(v, i) { return v*b[i] }).reduce(function(acc, cur) { return acc + cur; }); |
| }; |
| CanvasKit.Vector.lengthSquared = function(v) { |
| return CanvasKit.Vector.dot(v, v); |
| }; |
| CanvasKit.Vector.length = function(v) { |
| return Math.sqrt(CanvasKit.Vector.lengthSquared(v)); |
| }; |
| CanvasKit.Vector.mulScalar = function(v, s) { |
| return v.map(function(i) { return i*s }); |
| }; |
| CanvasKit.Vector.add = function(a, b) { |
| return a.map(function(v, i) { return v+b[i] }); |
| }; |
| CanvasKit.Vector.sub = function(a, b) { |
| return a.map(function(v, i) { return v-b[i]; }); |
| }; |
| CanvasKit.Vector.dist = function(a, b) { |
| return CanvasKit.Vector.length(CanvasKit.Vector.sub(a, b)); |
| }; |
| CanvasKit.Vector.normalize = function(v) { |
| return CanvasKit.Vector.mulScalar(v, 1/CanvasKit.Vector.length(v)); |
| }; |
| CanvasKit.Vector.cross = function(a, b) { |
| if (IsDebug && (a.length !== 3 || a.length !== 3)) { |
| throw 'Cross product is only defined for 3-dimensional vectors (a.length='+a.length+', b.length='+b.length+')'; |
| } |
| return [ |
| a[1]*b[2] - a[2]*b[1], |
| a[2]*b[0] - a[0]*b[2], |
| a[0]*b[1] - a[1]*b[0], |
| ]; |
| }; |
| |
| // Functions for creating and manipulating (row-major) 4x4 matrices. Accepted in place of |
| // SkM44 in canvas methods, for the same reasons as the 3x3 matrices above. |
| // ported from C++ code in SkM44.cpp |
| CanvasKit.M44 = {}; |
| // Create a 4x4 identity matrix |
| CanvasKit.M44.identity = function() { |
| return identityN(4); |
| }; |
| |
| // Anything named vec below is an array of length 3 representing a vector/point in 3D space. |
| // Create a 4x4 matrix representing a translate by the provided 3-vec |
| CanvasKit.M44.translated = function(vec) { |
| return stride(vec, identityN(4), 4, 3, 0); |
| }; |
| // Create a 4x4 matrix representing a scaling by the provided 3-vec |
| CanvasKit.M44.scaled = function(vec) { |
| return stride(vec, identityN(4), 4, 0, 1); |
| }; |
| // Create a 4x4 matrix representing a rotation about the provided axis 3-vec. |
| // axis does not need to be normalized. |
| CanvasKit.M44.rotated = function(axisVec, radians) { |
| return CanvasKit.M44.rotatedUnitSinCos( |
| CanvasKit.Vector.normalize(axisVec), Math.sin(radians), Math.cos(radians)); |
| }; |
| // Create a 4x4 matrix representing a rotation about the provided normalized axis 3-vec. |
| // Rotation is provided redundantly as both sin and cos values. |
| // This rotate can be used when you already have the cosAngle and sinAngle values |
| // so you don't have to atan(cos/sin) to call roatated() which expects an angle in radians. |
| // this does no checking! Behavior for invalid sin or cos values or non-normalized axis vectors |
| // is incorrect. Prefer rotated(). |
| CanvasKit.M44.rotatedUnitSinCos = function(axisVec, sinAngle, cosAngle) { |
| var x = axisVec[0]; |
| var y = axisVec[1]; |
| var z = axisVec[2]; |
| var c = cosAngle; |
| var s = sinAngle; |
| var t = 1 - c; |
| return [ |
| t*x*x + c, t*x*y - s*z, t*x*z + s*y, 0, |
| t*x*y + s*z, t*y*y + c, t*y*z - s*x, 0, |
| t*x*z - s*y, t*y*z + s*x, t*z*z + c, 0, |
| 0, 0, 0, 1 |
| ]; |
| }; |
| // Create a 4x4 matrix representing a camera at eyeVec, pointed at centerVec. |
| CanvasKit.M44.lookat = function(eyeVec, centerVec, upVec) { |
| var f = CanvasKit.Vector.normalize(CanvasKit.Vector.sub(centerVec, eyeVec)); |
| var u = CanvasKit.Vector.normalize(upVec); |
| var s = CanvasKit.Vector.normalize(CanvasKit.Vector.cross(f, u)); |
| |
| var m = CanvasKit.M44.identity(); |
| // set each column's top three numbers |
| stride(s, m, 4, 0, 0); |
| stride(CanvasKit.Vector.cross(s, f), m, 4, 1, 0); |
| stride(CanvasKit.Vector.mulScalar(f, -1), m, 4, 2, 0); |
| stride(eyeVec, m, 4, 3, 0); |
| |
| var m2 = CanvasKit.M44.invert(m); |
| if (m2 === null) { |
| return CanvasKit.M44.identity(); |
| } |
| return m2; |
| }; |
| // Create a 4x4 matrix representing a perspective. All arguments are scalars. |
| // angle is in radians. |
| CanvasKit.M44.perspective = function(near, far, angle) { |
| if (IsDebug && (far <= near)) { |
| throw 'far must be greater than near when constructing M44 using perspective.'; |
| } |
| var dInv = 1 / (far - near); |
| var halfAngle = angle / 2; |
| var cot = Math.cos(halfAngle) / Math.sin(halfAngle); |
| return [ |
| cot, 0, 0, 0, |
| 0, cot, 0, 0, |
| 0, 0, (far+near)*dInv, 2*far*near*dInv, |
| 0, 0, -1, 1, |
| ]; |
| }; |
| // Returns the number at the given row and column in matrix m. |
| CanvasKit.M44.rc = function(m, r, c) { |
| return m[r*4+c]; |
| }; |
| // Accepts any number of 4x4 matrix arguments, multiplies them left to right. |
| CanvasKit.M44.multiply = function() { |
| return multiplyMany(4, arguments); |
| }; |
| |
| // Invert the 4x4 matrix if it is invertible and return it. if not, return null. |
| // taken from SkM44.cpp (altered to use row-major order) |
| // m is not altered. |
| CanvasKit.M44.invert = function(m) { |
| if (IsDebug && !m.every(isnumber)) { |
| throw 'some members of matrix are NaN m='+m; |
| } |
| |
| var a00 = m[0]; |
| var a01 = m[4]; |
| var a02 = m[8]; |
| var a03 = m[12]; |
| var a10 = m[1]; |
| var a11 = m[5]; |
| var a12 = m[9]; |
| var a13 = m[13]; |
| var a20 = m[2]; |
| var a21 = m[6]; |
| var a22 = m[10]; |
| var a23 = m[14]; |
| var a30 = m[3]; |
| var a31 = m[7]; |
| var a32 = m[11]; |
| var a33 = m[15]; |
| |
| var b00 = a00 * a11 - a01 * a10; |
| var b01 = a00 * a12 - a02 * a10; |
| var b02 = a00 * a13 - a03 * a10; |
| var b03 = a01 * a12 - a02 * a11; |
| var b04 = a01 * a13 - a03 * a11; |
| var b05 = a02 * a13 - a03 * a12; |
| var b06 = a20 * a31 - a21 * a30; |
| var b07 = a20 * a32 - a22 * a30; |
| var b08 = a20 * a33 - a23 * a30; |
| var b09 = a21 * a32 - a22 * a31; |
| var b10 = a21 * a33 - a23 * a31; |
| var b11 = a22 * a33 - a23 * a32; |
| |
| // calculate determinate |
| var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06; |
| var invdet = 1.0 / det; |
| |
| // bail out if the matrix is not invertible |
| if (det === 0 || invdet === Infinity) { |
| Debug('Warning, uninvertible matrix'); |
| return null; |
| } |
| |
| b00 *= invdet; |
| b01 *= invdet; |
| b02 *= invdet; |
| b03 *= invdet; |
| b04 *= invdet; |
| b05 *= invdet; |
| b06 *= invdet; |
| b07 *= invdet; |
| b08 *= invdet; |
| b09 *= invdet; |
| b10 *= invdet; |
| b11 *= invdet; |
| |
| // store result in row major order |
| var tmp = [ |
| a11 * b11 - a12 * b10 + a13 * b09, |
| a12 * b08 - a10 * b11 - a13 * b07, |
| a10 * b10 - a11 * b08 + a13 * b06, |
| a11 * b07 - a10 * b09 - a12 * b06, |
| |
| a02 * b10 - a01 * b11 - a03 * b09, |
| a00 * b11 - a02 * b08 + a03 * b07, |
| a01 * b08 - a00 * b10 - a03 * b06, |
| a00 * b09 - a01 * b07 + a02 * b06, |
| |
| a31 * b05 - a32 * b04 + a33 * b03, |
| a32 * b02 - a30 * b05 - a33 * b01, |
| a30 * b04 - a31 * b02 + a33 * b00, |
| a31 * b01 - a30 * b03 - a32 * b00, |
| |
| a22 * b04 - a21 * b05 - a23 * b03, |
| a20 * b05 - a22 * b02 + a23 * b01, |
| a21 * b02 - a20 * b04 - a23 * b00, |
| a20 * b03 - a21 * b01 + a22 * b00, |
| ]; |
| |
| |
| if (!tmp.every(function(val) { return !isNaN(val) && val !== Infinity && val !== -Infinity; })) { |
| Debug('inverted matrix contains infinities or NaN '+tmp); |
| return null; |
| } |
| return tmp; |
| }; |
| |
| CanvasKit.M44.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.M44.mustInvert = function(m) { |
| var m2 = CanvasKit.M44.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.M44.setupCamera = function(area, zscale, cam) { |
| var camera = CanvasKit.M44.lookat(cam['eye'], cam['coa'], cam['up']); |
| var perspective = CanvasKit.M44.perspective(cam['near'], cam['far'], cam['angle']); |
| var center = [(area[0] + area[2])/2, (area[1] + area[3])/2, 0]; |
| var viewScale = [(area[2] - area[0])/2, (area[3] - area[1])/2, zscale]; |
| var viewport = CanvasKit.M44.multiply( |
| CanvasKit.M44.translated(center), |
| CanvasKit.M44.scaled(viewScale)); |
| return CanvasKit.M44.multiply( |
| viewport, perspective, camera, CanvasKit.M44.mustInvert(viewport)); |
| }; |
| |
| // An ColorMatrix 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.ColorMatrix = {}; |
| CanvasKit.ColorMatrix.identity = function() { |
| var m = new Float32Array(20); |
| m[rScale] = 1; |
| m[gScale] = 1; |
| m[bScale] = 1; |
| m[aScale] = 1; |
| return m; |
| }; |
| |
| CanvasKit.ColorMatrix.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.ColorMatrix.rotated = function(axis, sine, cosine) { |
| var m = CanvasKit.ColorMatrix.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 ColorMatrix (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.ColorMatrix.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 ColorMatrix that is the result of multiplying outer*inner |
| CanvasKit.ColorMatrix.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.Path.MakeFromCmds = function(cmds) { |
| var ptrLen = loadCmdsTypedArray(cmds); |
| var path = CanvasKit.Path._MakeFromCmds(ptrLen[0], ptrLen[1]); |
| CanvasKit._free(ptrLen[0]); |
| return path; |
| }; |
| |
| // The weights array is optional (only used for conics). |
| CanvasKit.Path.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.Path._MakeFromVerbsPointsWeights( |
| verbsPtr, verbs.length, pointsPtr, pts.length, weightsPtr, numWeights); |
| freeArraysThatAreNotMallocedByUsers(verbsPtr, verbs); |
| freeArraysThatAreNotMallocedByUsers(pointsPtr, pts); |
| freeArraysThatAreNotMallocedByUsers(weightsPtr, weights); |
| return path; |
| }; |
| |
| CanvasKit.Path.prototype.addArc = function(oval, startAngle, sweepAngle) { |
| // see arc() for the HTMLCanvas version |
| // note input angles are degrees. |
| var oPtr = copyRectToWasm(oval); |
| this._addArc(oPtr, startAngle, sweepAngle); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.addOval = function(oval, isCCW, startIndex) { |
| if (startIndex === undefined) { |
| startIndex = 1; |
| } |
| var oPtr = copyRectToWasm(oval); |
| this._addOval(oPtr, !!isCCW, startIndex); |
| return this; |
| }; |
| |
| // TODO(kjlubick) clean up this API - split it apart if necessary |
| CanvasKit.Path.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 { |
| Debug('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.Path.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 { |
| // TODO(kjlubick) deprecate and remove the 2d array input |
| ptr = copy2dArray(points, 'HEAPF32'); |
| n = points.length; |
| } |
| this._addPoly(ptr, n, close); |
| freeArraysThatAreNotMallocedByUsers(ptr, points); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.addRect = function(rect, isCCW) { |
| var rPtr = copyRectToWasm(rect); |
| this._addRect(rPtr, !!isCCW); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.addRRect = function(rrect, isCCW) { |
| var rPtr = copyRRectToWasm(rrect); |
| this._addRRect(rPtr, !!isCCW); |
| return this; |
| }; |
| |
| // The weights array is optional (only used for conics). |
| CanvasKit.Path.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.Path.prototype.arc = function(x, y, radius, startAngle, endAngle, ccw) { |
| // emulates the HTMLCanvas behavior. See addArc() for the Path 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.Path(); |
| temp.addArc(bounds, radiansToDegrees(startAngle), sweep); |
| this.addPath(temp, true); |
| temp.delete(); |
| return this; |
| }; |
| |
| // Appends arc to Path. 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.Path.prototype.arcToOval = function(oval, startAngle, sweepAngle, forceMoveTo) { |
| var oPtr = copyRectToWasm(oval); |
| this._arcToOval(oPtr, startAngle, sweepAngle, forceMoveTo); |
| return this; |
| }; |
| |
| // Appends arc to Path. 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 point 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 point equals (x, y). arcTo() scales radii |
| // (rx, ry) to fit last point 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.Path.prototype.arcToRotated = function(rx, ry, xAxisRotate, useSmallArc, isCCW, x, y) { |
| this._arcToRotated(rx, ry, xAxisRotate, !!useSmallArc, !!isCCW, x, y); |
| return this; |
| }; |
| |
| // Appends arc to Path, after appending line if needed. Arc is implemented by conic |
| // weighted to describe part of circle. Arc is contained by tangent from |
| // last Path 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.Path.prototype.arcToTangent = function(x1, y1, x2, y2, radius) { |
| this._arcToTangent(x1, y1, x2, y2, radius); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.close = function() { |
| this._close(); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.conicTo = function(x1, y1, x2, y2, w) { |
| this._conicTo(x1, y1, x2, y2, w); |
| return this; |
| }; |
| |
| // Clients can pass in a Float32Array with length 4 to this and the results |
| // will be copied into that array. Otherwise, a new TypedArray will be allocated |
| // and returned. |
| CanvasKit.Path.prototype.computeTightBounds = function(optionalOutputArray) { |
| this._computeTightBounds(_scratchRectPtr); |
| var ta = _scratchRect['toTypedArray'](); |
| if (optionalOutputArray) { |
| optionalOutputArray.set(ta); |
| return optionalOutputArray; |
| } |
| return ta.slice(); |
| }; |
| |
| CanvasKit.Path.prototype.cubicTo = function(cp1x, cp1y, cp2x, cp2y, x, y) { |
| this._cubicTo(cp1x, cp1y, cp2x, cp2y, x, y); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.dash = function(on, off, phase) { |
| if (this._dash(on, off, phase)) { |
| return this; |
| } |
| return null; |
| }; |
| |
| // Clients can pass in a Float32Array with length 4 to this and the results |
| // will be copied into that array. Otherwise, a new TypedArray will be allocated |
| // and returned. |
| CanvasKit.Path.prototype.getBounds = function(optionalOutputArray) { |
| this._getBounds(_scratchRectPtr); |
| var ta = _scratchRect['toTypedArray'](); |
| if (optionalOutputArray) { |
| optionalOutputArray.set(ta); |
| return optionalOutputArray; |
| } |
| return ta.slice(); |
| }; |
| |
| CanvasKit.Path.prototype.lineTo = function(x, y) { |
| this._lineTo(x, y); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.moveTo = function(x, y) { |
| this._moveTo(x, y); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.offset = function(dx, dy) { |
| this._transform(1, 0, dx, |
| 0, 1, dy, |
| 0, 0, 1); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.quadTo = function(cpx, cpy, x, y) { |
| this._quadTo(cpx, cpy, x, y); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.rArcTo = function(rx, ry, xAxisRotate, useSmallArc, isCCW, dx, dy) { |
| this._rArcTo(rx, ry, xAxisRotate, useSmallArc, isCCW, dx, dy); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.rConicTo = function(dx1, dy1, dx2, dy2, w) { |
| this._rConicTo(dx1, dy1, dx2, dy2, w); |
| return this; |
| }; |
| |
| // These params are all relative |
| CanvasKit.Path.prototype.rCubicTo = function(cp1x, cp1y, cp2x, cp2y, x, y) { |
| this._rCubicTo(cp1x, cp1y, cp2x, cp2y, x, y); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.rLineTo = function(dx, dy) { |
| this._rLineTo(dx, dy); |
| return this; |
| }; |
| |
| CanvasKit.Path.prototype.rMoveTo = function(dx, dy) { |
| this._rMoveTo(dx, dy); |
| return this; |
| }; |
| |
| // These params are all relative |
| CanvasKit.Path.prototype.rQuadTo = function(cpx, cpy, x, y) { |
| this._rQuadTo(cpx, cpy, x, y); |
| return this; |
| }; |
| |
| CanvasKit.Path.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; |
| }; |
| |
| // TODO(kjlubick) Change this to take a 3x3 or 4x4 matrix (optionally malloc'd) |
| CanvasKit.Path.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.Path.prototype.trim = function(startT, stopT, isComplement) { |
| if (this._trim(startT, stopT, !!isComplement)) { |
| return this; |
| } |
| return null; |
| }; |
| |
| CanvasKit.Image.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.Image.prototype.makeShader = function(xTileMode, yTileMode, localMatrix) { |
| var localMatrixPtr = copy3x3MatrixToWasm(localMatrix); |
| return this._makeShader(xTileMode, yTileMode, localMatrixPtr); |
| }; |
| |
| function readPixels(source, srcX, srcY, imageInfo, destMallocObj, bytesPerRow) { |
| if (!bytesPerRow) { |
| bytesPerRow = 4 * imageInfo['width']; |
| if (imageInfo['colorType'] === CanvasKit.ColorType.RGBA_F16) { |
| bytesPerRow *= 2; |
| } |
| else if (imageInfo['colorType'] === CanvasKit.ColorType.RGBA_F32) { |
| bytesPerRow *= 4; |
| } |
| } |
| var pBytes = bytesPerRow * imageInfo.height; |
| var pPtr; |
| if (destMallocObj) { |
| pPtr = destMallocObj['byteOffset']; |
| } else { |
| pPtr = CanvasKit._malloc(pBytes); |
| } |
| |
| if (!source._readPixels(imageInfo, pPtr, bytesPerRow, srcX, srcY)) { |
| Debug('Could not read pixels with the given inputs'); |
| if (!destMallocObj) { |
| CanvasKit._free(pPtr); |
| } |
| return null; |
| } |
| |
| // If the user provided us a buffer to copy into, we don't need to allocate a new TypedArray. |
| if (destMallocObj) { |
| return destMallocObj['toTypedArray'](); // Return the typed array wrapper w/o allocating. |
| } |
| |
| // 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: |
| case CanvasKit.ColorType.RGBA_F16: // there is no half-float JS type, so we return raw bytes. |
| 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; |
| default: |
| Debug('ColorType not yet supported'); |
| return null; |
| } |
| |
| // Free the allocated pixels in the WASM memory |
| CanvasKit._free(pPtr); |
| return retVal; |
| } |
| |
| CanvasKit.Image.prototype.readPixels = function(srcX, srcY, imageInfo, destMallocObj, |
| bytesPerRow) { |
| return readPixels(this, srcX, srcY, imageInfo, destMallocObj, bytesPerRow); |
| }; |
| |
| // Accepts an array of four numbers in the range of 0-1 representing a 4f color |
| CanvasKit.Canvas.prototype.clear = function(color4f) { |
| var cPtr = copyColorToWasm(color4f); |
| this._clear(cPtr); |
| }; |
| |
| CanvasKit.Canvas.prototype.clipRRect = function(rrect, op, antialias) { |
| var rPtr = copyRRectToWasm(rrect); |
| this._clipRRect(rPtr, op, antialias); |
| }; |
| |
| CanvasKit.Canvas.prototype.clipRect = function(rect, op, antialias) { |
| var rPtr = copyRectToWasm(rect); |
| this._clipRect(rPtr, op, antialias); |
| }; |
| |
| // 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.Canvas.prototype.concat = function(matr) { |
| var matrPtr = copy4x4MatrixToWasm(matr); |
| this._concat(matrPtr); |
| }; |
| |
| CanvasKit.Canvas.prototype.drawArc = function(oval, startAngle, sweepAngle, useCenter, paint) { |
| var oPtr = copyRectToWasm(oval); |
| this._drawArc(oPtr, startAngle, sweepAngle, useCenter, paint); |
| }; |
| |
| // atlas is an Image, e.g. from CanvasKit.MakeImageFromEncoded |
| // srcRects, dstXforms, and colors should be CanvasKit.RectBuilder, CanvasKit.RSXFormBuilder, |
| // and CanvasKit.ColorBuilder (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 ColorBuilder, a Uint32Array of int colors, |
| // a Flat Float32Array of float colors or a 2d Array of Float32Array(4) (deprecated) |
| // TODO(kjlubick) remove Builders - no longer needed now that Malloc is a thing. |
| CanvasKit.Canvas.prototype.drawAtlas = function(atlas, srcRects, dstXforms, paint, |
| /*optional*/ blendMode, colors) { |
| if (!atlas || !paint || !srcRects || !dstXforms) { |
| Debug('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) { |
| Debug('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.Canvas.prototype.drawColor = function (color4f, mode) { |
| var cPtr = copyColorToWasm(color4f); |
| if (mode !== undefined) { |
| this._drawColor(cPtr, mode); |
| } else { |
| this._drawColor(cPtr); |
| } |
| }; |
| |
| CanvasKit.Canvas.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); |
| } |
| }; |
| |
| CanvasKit.Canvas.prototype.drawDRRect = function(outer, inner, paint) { |
| var oPtr = copyRRectToWasm(outer, _scratchRRectPtr); |
| var iPtr = copyRRectToWasm(inner, _scratchRRect2Ptr); |
| this._drawDRRect(oPtr, iPtr, paint); |
| }; |
| |
| CanvasKit.Canvas.prototype.drawImageNine = function(img, center, dest, paint) { |
| var cPtr = copyIRectToWasm(center); |
| var dPtr = copyRectToWasm(dest); |
| this._drawImageNine(img, cPtr, dPtr, paint); |
| }; |
| |
| CanvasKit.Canvas.prototype.drawImageRect = function(img, src, dest, paint, fastSample) { |
| var sPtr = copyRectToWasm(src, _scratchRectPtr); |
| var dPtr = copyRectToWasm(dest, _scratchRect2Ptr); |
| this._drawImageRect(img, sPtr, dPtr, paint, !!fastSample); |
| }; |
| |
| CanvasKit.Canvas.prototype.drawOval = function(oval, paint) { |
| var oPtr = copyRectToWasm(oval); |
| this._drawOval(oPtr, paint); |
| }; |
| |
| // 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.Canvas.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.Canvas.prototype.drawRRect = function(rrect, paint) { |
| var rPtr = copyRRectToWasm(rrect); |
| this._drawRRect(rPtr, paint); |
| }; |
| |
| CanvasKit.Canvas.prototype.drawRect = function(rect, paint) { |
| var rPtr = copyRectToWasm(rect); |
| this._drawRect(rPtr, paint); |
| }; |
| |
| CanvasKit.Canvas.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.Canvas.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.Canvas.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.Canvas.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 Matrix 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; |
| }; |
| |
| CanvasKit.Canvas.prototype.readPixels = function(srcX, srcY, imageInfo, destMallocObj, |
| bytesPerRow) { |
| return readPixels(this, srcX, srcY, imageInfo, destMallocObj, bytesPerRow); |
| }; |
| |
| CanvasKit.Canvas.prototype.saveLayer = function(paint, boundsRect, backdrop, flags) { |
| // bPtr will be 0 (nullptr) if boundsRect is undefined/null. |
| var bPtr = copyRectToWasm(boundsRect); |
| // These or clauses help emscripten, which does not deal with undefined well. |
| return this._saveLayer(paint || null, bPtr, backdrop || null, flags || 0); |
| }; |
| |
| // pixels should be a Uint8Array or a plain JS array. |
| CanvasKit.Canvas.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.ColorSpace.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.ColorFilter.MakeBlend = function(color4f, mode) { |
| var cPtr = copyColorToWasm(color4f); |
| var result = CanvasKit.ColorFilter._MakeBlend(cPtr, mode); |
| return result; |
| }; |
| |
| // colorMatrix is an ColorMatrix (e.g. Float32Array of length 20) |
| CanvasKit.ColorFilter.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.ColorFilter._makeMatrix(fptr); |
| freeArraysThatAreNotMallocedByUsers(fptr, colorMatrix); |
| return m; |
| }; |
| |
| CanvasKit.ImageFilter.MakeMatrixTransform = function(matr, filterQuality, input) { |
| var matrPtr = copy3x3MatrixToWasm(matr); |
| return CanvasKit.ImageFilter._MakeMatrixTransform(matrPtr, filterQuality, input); |
| }; |
| |
| CanvasKit.Paint.prototype.getColor = function() { |
| this._getColor(_scratchColorPtr); |
| return copyColorFromWasm(_scratchColorPtr); |
| }; |
| |
| CanvasKit.Paint.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<ColorSpace> 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.Paint.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<ColorSpace> expected here. |
| var cPtr = copyColorComponentsToWasm(r, g, b, a); |
| this._setColor(cPtr, colorSpace); |
| }; |
| |
| CanvasKit.PictureRecorder.prototype.beginRecording = function(bounds) { |
| var bPtr = copyRectToWasm(bounds); |
| return this._beginRecording(bPtr); |
| }; |
| |
| CanvasKit.Surface.prototype.makeImageSnapshot = function(optionalBoundsRect) { |
| var bPtr = copyIRectToWasm(optionalBoundsRect); |
| return this._makeImageSnapshot(bPtr); |
| }; |
| |
| CanvasKit.Surface.prototype.requestAnimationFrame = function(callback, dirtyRect) { |
| if (!this._cached_canvas) { |
| this._cached_canvas = this.getCanvas(); |
| } |
| requestAnimationFrame(function() { |
| if (this._context !== undefined) { |
| CanvasKit.setCurrentContext(this._context); |
| } |
| |
| callback(this._cached_canvas); |
| |
| // We do not dispose() of the Surface 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.Surface.prototype.drawOnce = function(callback, dirtyRect) { |
| if (!this._cached_canvas) { |
| this._cached_canvas = this.getCanvas(); |
| } |
| requestAnimationFrame(function() { |
| if (this._context !== undefined) { |
| CanvasKit.setCurrentContext(this._context); |
| } |
| callback(this._cached_canvas); |
| |
| this.flush(dirtyRect); |
| this.dispose(); |
| }.bind(this)); |
| }; |
| |
| CanvasKit.PathEffect.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.PathEffect._MakeDash(ptr, intervals.length, phase); |
| freeArraysThatAreNotMallocedByUsers(ptr, intervals); |
| return dpe; |
| }; |
| |
| CanvasKit.Shader.MakeColor = function(color4f, colorSpace) { |
| colorSpace = colorSpace || null |
| var cPtr = copyColorToWasm(color4f); |
| return CanvasKit.Shader._MakeColor(cPtr, colorSpace); |
| }; |
| |
| // TODO(kjlubick) remove deprecated names. |
| CanvasKit.Shader.Blend = CanvasKit.Shader.MakeBlend; |
| CanvasKit.Shader.Color = CanvasKit.Shader.MakeColor; |
| CanvasKit.Shader.Lerp = CanvasKit.Shader.MakeLerp; |
| |
| CanvasKit.Shader.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.Shader._MakeLinearGradient(start, end, cPtrInfo.colorPtr, cPtrInfo.colorType, posPtr, |
| cPtrInfo.count, mode, flags, localMatrixPtr, colorSpace); |
| |
| freeArraysThatAreNotMallocedByUsers(cPtrInfo.colorPtr, colors); |
| pos && freeArraysThatAreNotMallocedByUsers(posPtr, pos); |
| return lgs; |
| }; |
| |
| CanvasKit.Shader.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.Shader._MakeRadialGradient(center, radius, cPtrInfo.colorPtr, cPtrInfo.colorType, posPtr, |
| cPtrInfo.count, mode, flags, localMatrixPtr, colorSpace); |
| |
| freeArraysThatAreNotMallocedByUsers(cPtrInfo.colorPtr, colors); |
| pos && freeArraysThatAreNotMallocedByUsers(posPtr, pos); |
| return rgs; |
| }; |
| |
| CanvasKit.Shader.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.Shader._MakeSweepGradient(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.Shader.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.Shader._MakeTwoPointConicalGradient( |
| 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; |
| }; |
| |
| // Clients can pass in a Float32Array with length 4 to this and the results |
| // will be copied into that array. Otherwise, a new TypedArray will be allocated |
| // and returned. |
| CanvasKit.Vertices.prototype.bounds = function(optionalOutputArray) { |
| this._bounds(_scratchRectPtr); |
| var ta = _scratchRect['toTypedArray'](); |
| if (optionalOutputArray) { |
| optionalOutputArray.set(ta); |
| return optionalOutputArray; |
| } |
| return ta.slice(); |
| }; |
| |
| // 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 Float32Array.of(l, t, r, b); |
| }; |
| |
| CanvasKit.XYWHRect = function(x, y, w, h) { |
| return Float32Array.of(x, y, x+w, y+h); |
| }; |
| |
| CanvasKit.LTRBiRect = function(l, t, r, b) { |
| return Int32Array.of(l, t, r, b); |
| }; |
| |
| CanvasKit.XYWHiRect = function(x, y, w, h) { |
| return Int32Array.of(x, y, x+w, y+h); |
| }; |
| |
| // RRectXY returns a TypedArray representing an RRect with the given rect and a radiusX and |
| // radiusY for all 4 corners. |
| CanvasKit.RRectXY = function(rect, rx, ry) { |
| return Float32Array.of( |
| rect[0], rect[1], rect[2], rect[3], |
| rx, ry, |
| rx, ry, |
| rx, ry, |
| rx, 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) { |
| Debug('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) { |
| Debug('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({ |
| 'width': width, |
| 'height': height, |
| 'alphaType': CanvasKit.AlphaType.Unpremul, |
| 'colorType': CanvasKit.ColorType.RGBA_8888, |
| 'colorSpace': CanvasKit.ColorSpace.SRGB |
| }, imageData.data, 4 * width); |
| }; |
| |
| // pixels may be an array but Uint8Array or Uint8ClampedArray is recommended, |
| // with the bytes representing the pixel values. |
| // (e.g. each set of 4 bytes could represent RGBA values for a single pixel). |
| CanvasKit.MakeImage = function(info, pixels, bytesPerRow) { |
| var pptr = CanvasKit._malloc(pixels.length); |
| CanvasKit.HEAPU8.set(pixels, pptr); // We always want to copy the bytes into the WASM heap. |
| // No need to _free pptr, Image takes it with SkData::MakeFromMalloc |
| return CanvasKit._MakeImage(info, pptr, pixels.length, bytesPerRow); |
| }; |
| |
| // 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. |
| // ColorBuilder is not accepted. |
| CanvasKit.MakeVertices = 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._VerticesBuilder(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 MakeVertices, 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(); |
| }; |