12 SkScalar SkInvert2x2Matrix(const SkScalar inMatrix[4], SkScalar outMatrix[4]) {  in SkInvert2x2Matrix()
20     if (outMatrix) {  in SkInvert2x2Matrix()
22         outMatrix[0] =  a11 * invdet;  in SkInvert2x2Matrix()
23         outMatrix[1] = -a01 * invdet;  in SkInvert2x2Matrix()
24         outMatrix[2] = -a10 * invdet;  in SkInvert2x2Matrix()
25         outMatrix[3] =  a00 * invdet;  in SkInvert2x2Matrix()
28         if (!SkScalarsAreFinite(outMatrix, 4)) {  in SkInvert2x2Matrix()
35 SkScalar SkInvert3x3Matrix(const SkScalar inMatrix[9], SkScalar outMatrix[9]) {  in SkInvert3x3Matrix()
52     if (outMatrix) {  in SkInvert3x3Matrix()
54         outMatrix[0] = b01 * invdet;  in SkInvert3x3Matrix()
55         outMatrix[1] = (-a22 * a01 + a02 * a21) * invdet;  in SkInvert3x3Matrix()
56         outMatrix[2] = ( a12 * a01 - a02 * a11) * invdet;  in SkInvert3x3Matrix()
57         outMatrix[3] = b11 * invdet;  in SkInvert3x3Matrix()
58         outMatrix[4] = ( a22 * a00 - a02 * a20) * invdet;  in SkInvert3x3Matrix()
59         outMatrix[5] = (-a12 * a00 + a02 * a10) * invdet;  in SkInvert3x3Matrix()
60         outMatrix[6] = b21 * invdet;  in SkInvert3x3Matrix()
61         outMatrix[7] = (-a21 * a00 + a01 * a20) * invdet;  in SkInvert3x3Matrix()
62         outMatrix[8] = ( a11 * a00 - a01 * a10) * invdet;  in SkInvert3x3Matrix()
65         if (!SkScalarsAreFinite(outMatrix, 9)) {  in SkInvert3x3Matrix()
72 SkScalar SkInvert4x4Matrix(const SkScalar inMatrix[16], SkScalar outMatrix[16]) {  in SkInvert4x4Matrix()
105     if (outMatrix) {  in SkInvert4x4Matrix()
120         outMatrix[0]  = a11 * b11 - a12 * b10 + a13 * b09;  in SkInvert4x4Matrix()
121         outMatrix[1]  = a02 * b10 - a01 * b11 - a03 * b09;  in SkInvert4x4Matrix()
122         outMatrix[2]  = a31 * b05 - a32 * b04 + a33 * b03;  in SkInvert4x4Matrix()
123         outMatrix[3]  = a22 * b04 - a21 * b05 - a23 * b03;  in SkInvert4x4Matrix()
124         outMatrix[4]  = a12 * b08 - a10 * b11 - a13 * b07;  in SkInvert4x4Matrix()
125         outMatrix[5]  = a00 * b11 - a02 * b08 + a03 * b07;  in SkInvert4x4Matrix()
126         outMatrix[6]  = a32 * b02 - a30 * b05 - a33 * b01;  in SkInvert4x4Matrix()
127         outMatrix[7]  = a20 * b05 - a22 * b02 + a23 * b01;  in SkInvert4x4Matrix()
128         outMatrix[8]  = a10 * b10 - a11 * b08 + a13 * b06;  in SkInvert4x4Matrix()
129         outMatrix[9]  = a01 * b08 - a00 * b10 - a03 * b06;  in SkInvert4x4Matrix()
130         outMatrix[10] = a30 * b04 - a31 * b02 + a33 * b00;  in SkInvert4x4Matrix()
131         outMatrix[11] = a21 * b02 - a20 * b04 - a23 * b00;  in SkInvert4x4Matrix()
132         outMatrix[12] = a11 * b07 - a10 * b09 - a12 * b06;  in SkInvert4x4Matrix()
133         outMatrix[13] = a00 * b09 - a01 * b07 + a02 * b06;  in SkInvert4x4Matrix()
134         outMatrix[14] = a31 * b01 - a30 * b03 - a32 * b00;  in SkInvert4x4Matrix()
135         outMatrix[15] = a20 * b03 - a21 * b01 + a22 * b00;  in SkInvert4x4Matrix()
139         if (!SkScalarsAreFinite(outMatrix, 16)) {  in SkInvert4x4Matrix()