epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 2 | /* |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | |
epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 10 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 11 | #include "SkMatrix44.h" |
| 12 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 13 | SkMatrix44::SkMatrix44(const SkMatrix44& src) { |
| 14 | memcpy(this, &src, sizeof(src)); |
| 15 | } |
| 16 | |
| 17 | SkMatrix44::SkMatrix44(const SkMatrix44& a, const SkMatrix44& b) { |
| 18 | this->setConcat(a, b); |
| 19 | } |
| 20 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 21 | static inline bool eq4(const SkMScalar* SK_RESTRICT a, |
| 22 | const SkMScalar* SK_RESTRICT b) { |
| 23 | return (a[0] == b[0]) & (a[1] == b[1]) & (a[2] == b[2]) & (a[3] == b[3]); |
| 24 | } |
jamesr@chromium.org | deb4c16 | 2012-11-29 21:17:16 +0000 | [diff] [blame] | 25 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 26 | bool SkMatrix44::operator==(const SkMatrix44& other) const { |
| 27 | if (this == &other) { |
| 28 | return true; |
| 29 | } |
| 30 | |
| 31 | if (this->isTriviallyIdentity() && other.isTriviallyIdentity()) { |
| 32 | return true; |
| 33 | } |
| 34 | |
| 35 | const SkMScalar* SK_RESTRICT a = &fMat[0][0]; |
| 36 | const SkMScalar* SK_RESTRICT b = &other.fMat[0][0]; |
| 37 | |
| 38 | #if 0 |
reed@google.com | 631940c | 2012-11-27 13:13:22 +0000 | [diff] [blame] | 39 | for (int i = 0; i < 16; ++i) { |
| 40 | if (a[i] != b[i]) { |
| 41 | return false; |
| 42 | } |
| 43 | } |
| 44 | return true; |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 45 | #else |
| 46 | // to reduce branch instructions, we compare 4 at a time. |
| 47 | // see bench/Matrix44Bench.cpp for test. |
| 48 | if (!eq4(&a[0], &b[0])) { |
| 49 | return false; |
| 50 | } |
| 51 | if (!eq4(&a[4], &b[4])) { |
| 52 | return false; |
| 53 | } |
| 54 | if (!eq4(&a[8], &b[8])) { |
| 55 | return false; |
| 56 | } |
| 57 | return eq4(&a[12], &b[12]); |
| 58 | #endif |
| 59 | } |
| 60 | |
| 61 | /////////////////////////////////////////////////////////////////////////////// |
| 62 | |
| 63 | int SkMatrix44::computeTypeMask() const { |
| 64 | unsigned mask = 0; |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 65 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 66 | if (0 != perspX() || 0 != perspY() || 0 != perspZ() || 1 != fMat[3][3]) { |
| 67 | return kTranslate_Mask | kScale_Mask | kAffine_Mask | kPerspective_Mask; |
| 68 | } |
| 69 | |
| 70 | if (0 != transX() || 0 != transY() || 0 != transZ()) { |
| 71 | mask |= kTranslate_Mask; |
| 72 | } |
| 73 | |
| 74 | if (1 != scaleX() || 1 != scaleY() || 1 != scaleZ()) { |
| 75 | mask |= kScale_Mask; |
| 76 | } |
| 77 | |
| 78 | if (0 != fMat[1][0] || 0 != fMat[0][1] || 0 != fMat[0][2] || |
| 79 | 0 != fMat[2][0] || 0 != fMat[1][2] || 0 != fMat[2][1]) { |
| 80 | mask |= kAffine_Mask; |
| 81 | } |
| 82 | |
| 83 | return mask; |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | /////////////////////////////////////////////////////////////////////////////// |
| 87 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 88 | void SkMatrix44::asColMajorf(float dst[]) const { |
| 89 | const SkMScalar* src = &fMat[0][0]; |
| 90 | #ifdef SK_MSCALAR_IS_DOUBLE |
| 91 | for (int i = 0; i < 16; ++i) { |
| 92 | dst[i] = SkMScalarToFloat(src[i]); |
| 93 | } |
vollick@chromium.org | 5596a69 | 2012-11-13 20:12:00 +0000 | [diff] [blame] | 94 | #elif defined SK_MSCALAR_IS_FLOAT |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 95 | memcpy(dst, src, 16 * sizeof(float)); |
| 96 | #endif |
| 97 | } |
| 98 | |
| 99 | void SkMatrix44::asColMajord(double dst[]) const { |
| 100 | const SkMScalar* src = &fMat[0][0]; |
| 101 | #ifdef SK_MSCALAR_IS_DOUBLE |
| 102 | memcpy(dst, src, 16 * sizeof(double)); |
vollick@chromium.org | 5596a69 | 2012-11-13 20:12:00 +0000 | [diff] [blame] | 103 | #elif defined SK_MSCALAR_IS_FLOAT |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 104 | for (int i = 0; i < 16; ++i) { |
| 105 | dst[i] = SkMScalarToDouble(src[i]); |
| 106 | } |
| 107 | #endif |
| 108 | } |
| 109 | |
| 110 | void SkMatrix44::asRowMajorf(float dst[]) const { |
| 111 | const SkMScalar* src = &fMat[0][0]; |
| 112 | for (int i = 0; i < 4; ++i) { |
| 113 | dst[0] = SkMScalarToFloat(src[0]); |
| 114 | dst[4] = SkMScalarToFloat(src[1]); |
| 115 | dst[8] = SkMScalarToFloat(src[2]); |
| 116 | dst[12] = SkMScalarToFloat(src[3]); |
| 117 | src += 4; |
| 118 | dst += 1; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | void SkMatrix44::asRowMajord(double dst[]) const { |
| 123 | const SkMScalar* src = &fMat[0][0]; |
| 124 | for (int i = 0; i < 4; ++i) { |
| 125 | dst[0] = SkMScalarToDouble(src[0]); |
| 126 | dst[4] = SkMScalarToDouble(src[1]); |
| 127 | dst[8] = SkMScalarToDouble(src[2]); |
| 128 | dst[12] = SkMScalarToDouble(src[3]); |
| 129 | src += 4; |
| 130 | dst += 1; |
| 131 | } |
| 132 | } |
| 133 | |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 134 | void SkMatrix44::setColMajorf(const float src[]) { |
| 135 | SkMScalar* dst = &fMat[0][0]; |
| 136 | #ifdef SK_MSCALAR_IS_DOUBLE |
| 137 | for (int i = 0; i < 16; ++i) { |
| 138 | dst[i] = SkMScalarToFloat(src[i]); |
| 139 | } |
| 140 | #elif defined SK_MSCALAR_IS_FLOAT |
| 141 | memcpy(dst, src, 16 * sizeof(float)); |
| 142 | #endif |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 143 | |
| 144 | this->dirtyTypeMask(); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | void SkMatrix44::setColMajord(const double src[]) { |
| 148 | SkMScalar* dst = &fMat[0][0]; |
| 149 | #ifdef SK_MSCALAR_IS_DOUBLE |
| 150 | memcpy(dst, src, 16 * sizeof(double)); |
| 151 | #elif defined SK_MSCALAR_IS_FLOAT |
| 152 | for (int i = 0; i < 16; ++i) { |
robertphillips@google.com | 93f0332 | 2012-12-03 17:35:19 +0000 | [diff] [blame] | 153 | dst[i] = SkDoubleToMScalar(src[i]); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 154 | } |
| 155 | #endif |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 156 | |
| 157 | this->dirtyTypeMask(); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | void SkMatrix44::setRowMajorf(const float src[]) { |
| 161 | SkMScalar* dst = &fMat[0][0]; |
| 162 | for (int i = 0; i < 4; ++i) { |
| 163 | dst[0] = SkMScalarToFloat(src[0]); |
| 164 | dst[4] = SkMScalarToFloat(src[1]); |
| 165 | dst[8] = SkMScalarToFloat(src[2]); |
| 166 | dst[12] = SkMScalarToFloat(src[3]); |
| 167 | src += 4; |
| 168 | dst += 1; |
| 169 | } |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 170 | this->dirtyTypeMask(); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | void SkMatrix44::setRowMajord(const double src[]) { |
| 174 | SkMScalar* dst = &fMat[0][0]; |
| 175 | for (int i = 0; i < 4; ++i) { |
robertphillips@google.com | 93f0332 | 2012-12-03 17:35:19 +0000 | [diff] [blame] | 176 | dst[0] = SkDoubleToMScalar(src[0]); |
| 177 | dst[4] = SkDoubleToMScalar(src[1]); |
| 178 | dst[8] = SkDoubleToMScalar(src[2]); |
| 179 | dst[12] = SkDoubleToMScalar(src[3]); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 180 | src += 4; |
| 181 | dst += 1; |
| 182 | } |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 183 | this->dirtyTypeMask(); |
vollick@chromium.org | f11cf9f | 2012-11-19 21:02:06 +0000 | [diff] [blame] | 184 | } |
| 185 | |
reed@google.com | da9fac0 | 2011-06-13 14:46:52 +0000 | [diff] [blame] | 186 | /////////////////////////////////////////////////////////////////////////////// |
| 187 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 188 | const SkMatrix44& SkMatrix44::I() { |
reed@google.com | 1adad34 | 2012-12-10 21:21:27 +0000 | [diff] [blame] | 189 | static const SkMatrix44 gIdentity44(kIdentity_Constructor); |
| 190 | return gIdentity44; |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 191 | } |
| 192 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 193 | void SkMatrix44::setIdentity() { |
| 194 | sk_bzero(fMat, sizeof(fMat)); |
| 195 | fMat[0][0] = fMat[1][1] = fMat[2][2] = fMat[3][3] = 1; |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 196 | this->setTypeMask(kIdentity_Mask); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | void SkMatrix44::set3x3(SkMScalar m00, SkMScalar m01, SkMScalar m02, |
| 200 | SkMScalar m10, SkMScalar m11, SkMScalar m12, |
| 201 | SkMScalar m20, SkMScalar m21, SkMScalar m22) { |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 202 | fMat[0][0] = m00; fMat[0][1] = m01; fMat[0][2] = m02; fMat[0][3] = 0; |
| 203 | fMat[1][0] = m10; fMat[1][1] = m11; fMat[1][2] = m12; fMat[1][3] = 0; |
| 204 | fMat[2][0] = m20; fMat[2][1] = m21; fMat[2][2] = m22; fMat[2][3] = 0; |
| 205 | fMat[3][0] = 0; fMat[3][1] = 0; fMat[3][2] = 0; fMat[3][3] = 1; |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 206 | this->dirtyTypeMask(); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | /////////////////////////////////////////////////////////////////////////////// |
| 210 | |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 211 | void SkMatrix44::setTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz) { |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 212 | this->setIdentity(); |
skia.committer@gmail.com | e659c2e | 2012-12-04 02:01:25 +0000 | [diff] [blame] | 213 | |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 214 | if (!dx && !dy && !dz) { |
| 215 | return; |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 216 | } |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 217 | |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 218 | fMat[3][0] = dx; |
| 219 | fMat[3][1] = dy; |
| 220 | fMat[3][2] = dz; |
| 221 | this->setTypeMask(kTranslate_Mask); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | void SkMatrix44::preTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 225 | if (!dx && !dy && !dz) { |
| 226 | return; |
| 227 | } |
| 228 | |
| 229 | const double X = SkMScalarToDouble(dx); |
| 230 | const double Y = SkMScalarToDouble(dy); |
| 231 | const double Z = SkMScalarToDouble(dz); |
| 232 | |
| 233 | double tmp; |
| 234 | for (int i = 0; i < 4; ++i) { |
| 235 | tmp = fMat[0][i] * X + fMat[1][i] * Y + fMat[2][i] * Z + fMat[3][i]; |
| 236 | fMat[3][i] = SkDoubleToMScalar(tmp); |
| 237 | } |
| 238 | this->dirtyTypeMask(); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | void SkMatrix44::postTranslate(SkMScalar dx, SkMScalar dy, SkMScalar dz) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 242 | if (!dx && !dy && !dz) { |
| 243 | return; |
| 244 | } |
| 245 | |
| 246 | if (this->getType() & kPerspective_Mask) { |
| 247 | for (int i = 0; i < 4; ++i) { |
| 248 | fMat[i][0] += fMat[i][3] * dx; |
| 249 | fMat[i][1] += fMat[i][3] * dy; |
| 250 | fMat[i][2] += fMat[i][3] * dz; |
| 251 | } |
| 252 | } else { |
| 253 | fMat[3][0] += dx; |
| 254 | fMat[3][1] += dy; |
| 255 | fMat[3][2] += dz; |
| 256 | this->dirtyTypeMask(); |
| 257 | } |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | /////////////////////////////////////////////////////////////////////////////// |
| 261 | |
| 262 | void SkMatrix44::setScale(SkMScalar sx, SkMScalar sy, SkMScalar sz) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 263 | this->setIdentity(); |
| 264 | |
| 265 | if (1 == sx && 1 == sy && 1 == sz) { |
| 266 | return; |
| 267 | } |
| 268 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 269 | fMat[0][0] = sx; |
| 270 | fMat[1][1] = sy; |
| 271 | fMat[2][2] = sz; |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 272 | this->setTypeMask(kScale_Mask); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | void SkMatrix44::preScale(SkMScalar sx, SkMScalar sy, SkMScalar sz) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 276 | if (1 == sx && 1 == sy && 1 == sz) { |
| 277 | return; |
| 278 | } |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 279 | |
shawnsingh@chromium.org | f81f97e | 2012-12-13 22:21:36 +0000 | [diff] [blame^] | 280 | // The implementation matrix * pureScale can be shortcut |
| 281 | // by knowing that pureScale components effectively scale |
| 282 | // the columns of the original matrix. |
| 283 | for (int i = 0; i < 4; i++) { |
| 284 | fMat[0][i] *= sx; |
| 285 | fMat[1][i] *= sy; |
| 286 | fMat[2][i] *= sz; |
| 287 | } |
| 288 | this->dirtyTypeMask(); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | void SkMatrix44::postScale(SkMScalar sx, SkMScalar sy, SkMScalar sz) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 292 | if (1 == sx && 1 == sy && 1 == sz) { |
| 293 | return; |
| 294 | } |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 295 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 296 | for (int i = 0; i < 4; i++) { |
| 297 | fMat[i][0] *= sx; |
| 298 | fMat[i][1] *= sy; |
| 299 | fMat[i][2] *= sz; |
| 300 | } |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 301 | this->dirtyTypeMask(); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | /////////////////////////////////////////////////////////////////////////////// |
| 305 | |
| 306 | void SkMatrix44::setRotateAbout(SkMScalar x, SkMScalar y, SkMScalar z, |
| 307 | SkMScalar radians) { |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 308 | double len2 = (double)x * x + (double)y * y + (double)z * z; |
| 309 | if (1 != len2) { |
| 310 | if (0 == len2) { |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 311 | this->setIdentity(); |
| 312 | return; |
| 313 | } |
| 314 | double scale = 1 / sqrt(len2); |
bsalomon@google.com | 9d12f5c | 2011-09-29 18:08:18 +0000 | [diff] [blame] | 315 | x = SkDoubleToMScalar(x * scale); |
| 316 | y = SkDoubleToMScalar(y * scale); |
| 317 | z = SkDoubleToMScalar(z * scale); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 318 | } |
| 319 | this->setRotateAboutUnit(x, y, z, radians); |
| 320 | } |
| 321 | |
| 322 | void SkMatrix44::setRotateAboutUnit(SkMScalar x, SkMScalar y, SkMScalar z, |
| 323 | SkMScalar radians) { |
| 324 | double c = cos(radians); |
| 325 | double s = sin(radians); |
| 326 | double C = 1 - c; |
| 327 | double xs = x * s; |
| 328 | double ys = y * s; |
| 329 | double zs = z * s; |
| 330 | double xC = x * C; |
| 331 | double yC = y * C; |
| 332 | double zC = z * C; |
| 333 | double xyC = x * yC; |
| 334 | double yzC = y * zC; |
| 335 | double zxC = z * xC; |
| 336 | |
| 337 | // if you're looking at wikipedia, remember that we're column major. |
bsalomon@google.com | 9d12f5c | 2011-09-29 18:08:18 +0000 | [diff] [blame] | 338 | this->set3x3(SkDoubleToMScalar(x * xC + c), // scale x |
| 339 | SkDoubleToMScalar(xyC + zs), // skew x |
| 340 | SkDoubleToMScalar(zxC - ys), // trans x |
| 341 | |
| 342 | SkDoubleToMScalar(xyC - zs), // skew y |
| 343 | SkDoubleToMScalar(y * yC + c), // scale y |
| 344 | SkDoubleToMScalar(yzC + xs), // trans y |
| 345 | |
| 346 | SkDoubleToMScalar(zxC + ys), // persp x |
| 347 | SkDoubleToMScalar(yzC - xs), // persp y |
| 348 | SkDoubleToMScalar(z * zC + c)); // persp 2 |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | /////////////////////////////////////////////////////////////////////////////// |
| 352 | |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 353 | static bool bits_isonly(int value, int mask) { |
| 354 | return 0 == (value & ~mask); |
| 355 | } |
| 356 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 357 | void SkMatrix44::setConcat(const SkMatrix44& a, const SkMatrix44& b) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 358 | const SkMatrix44::TypeMask a_mask = a.getType(); |
| 359 | const SkMatrix44::TypeMask b_mask = b.getType(); |
| 360 | |
| 361 | if (kIdentity_Mask == a_mask) { |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 362 | *this = b; |
| 363 | return; |
| 364 | } |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 365 | if (kIdentity_Mask == b_mask) { |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 366 | *this = a; |
| 367 | return; |
| 368 | } |
| 369 | |
| 370 | bool useStorage = (this == &a || this == &b); |
| 371 | SkMScalar storage[16]; |
| 372 | SkMScalar* result = useStorage ? storage : &fMat[0][0]; |
| 373 | |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 374 | if (bits_isonly(a_mask | b_mask, kScale_Mask | kTranslate_Mask)) { |
| 375 | sk_bzero(result, sizeof(storage)); |
| 376 | result[0] = a.fMat[0][0] * b.fMat[0][0]; |
| 377 | result[5] = a.fMat[1][1] * b.fMat[1][1]; |
| 378 | result[10] = a.fMat[2][2] * b.fMat[2][2]; |
| 379 | result[12] = a.fMat[0][0] * b.fMat[3][0] + a.fMat[3][0]; |
| 380 | result[13] = a.fMat[1][1] * b.fMat[3][1] + a.fMat[3][1]; |
| 381 | result[14] = a.fMat[2][2] * b.fMat[3][2] + a.fMat[3][2]; |
| 382 | result[15] = 1; |
| 383 | } else { |
| 384 | for (int j = 0; j < 4; j++) { |
| 385 | for (int i = 0; i < 4; i++) { |
| 386 | double value = 0; |
| 387 | for (int k = 0; k < 4; k++) { |
| 388 | value += SkMScalarToDouble(a.fMat[k][i]) * b.fMat[j][k]; |
| 389 | } |
| 390 | *result++ = SkDoubleToMScalar(value); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 391 | } |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 392 | } |
| 393 | } |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 394 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 395 | if (useStorage) { |
| 396 | memcpy(fMat, storage, sizeof(storage)); |
| 397 | } |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 398 | this->dirtyTypeMask(); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | /////////////////////////////////////////////////////////////////////////////// |
| 402 | |
| 403 | static inline SkMScalar det2x2(double m00, double m01, double m10, double m11) { |
bsalomon@google.com | 9d12f5c | 2011-09-29 18:08:18 +0000 | [diff] [blame] | 404 | return SkDoubleToMScalar(m00 * m11 - m10 * m01); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | static inline double det3x3(double m00, double m01, double m02, |
| 408 | double m10, double m11, double m12, |
| 409 | double m20, double m21, double m22) { |
| 410 | return m00 * det2x2(m11, m12, m21, m22) - |
| 411 | m10 * det2x2(m01, m02, m21, m22) + |
| 412 | m20 * det2x2(m01, m02, m11, m12); |
| 413 | } |
| 414 | |
| 415 | /** We always perform the calculation in doubles, to avoid prematurely losing |
| 416 | precision along the way. This relies on the compiler automatically |
| 417 | promoting our SkMScalar values to double (if needed). |
| 418 | */ |
| 419 | double SkMatrix44::determinant() const { |
mike@reedtribe.org | f8b1ebc | 2012-12-10 03:27:47 +0000 | [diff] [blame] | 420 | if (this->isIdentity()) { |
| 421 | return 1; |
| 422 | } |
| 423 | if (this->isScaleTranslate()) { |
| 424 | return fMat[0][0] * fMat[1][1] * fMat[2][2] * fMat[3][3]; |
| 425 | } |
| 426 | |
tomhudson@google.com | 9973a8a | 2012-12-13 09:55:42 +0000 | [diff] [blame] | 427 | double a00 = fMat[0][0]; |
| 428 | double a01 = fMat[0][1]; |
| 429 | double a02 = fMat[0][2]; |
| 430 | double a03 = fMat[0][3]; |
| 431 | double a10 = fMat[1][0]; |
| 432 | double a11 = fMat[1][1]; |
| 433 | double a12 = fMat[1][2]; |
| 434 | double a13 = fMat[1][3]; |
| 435 | double a20 = fMat[2][0]; |
| 436 | double a21 = fMat[2][1]; |
| 437 | double a22 = fMat[2][2]; |
| 438 | double a23 = fMat[2][3]; |
| 439 | double a30 = fMat[3][0]; |
| 440 | double a31 = fMat[3][1]; |
| 441 | double a32 = fMat[3][2]; |
| 442 | double a33 = fMat[3][3]; |
| 443 | |
| 444 | double b00 = a00 * a11 - a01 * a10; |
| 445 | double b01 = a00 * a12 - a02 * a10; |
| 446 | double b02 = a00 * a13 - a03 * a10; |
| 447 | double b03 = a01 * a12 - a02 * a11; |
| 448 | double b04 = a01 * a13 - a03 * a11; |
| 449 | double b05 = a02 * a13 - a03 * a12; |
| 450 | double b06 = a20 * a31 - a21 * a30; |
| 451 | double b07 = a20 * a32 - a22 * a30; |
| 452 | double b08 = a20 * a33 - a23 * a30; |
| 453 | double b09 = a21 * a32 - a22 * a31; |
| 454 | double b10 = a21 * a33 - a23 * a31; |
| 455 | double b11 = a22 * a33 - a23 * a32; |
| 456 | |
| 457 | // Calculate the determinant |
| 458 | return b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06; |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | /////////////////////////////////////////////////////////////////////////////// |
| 462 | |
| 463 | // just picked a small value. not sure how to pick the "right" one |
| 464 | #define TOO_SMALL_FOR_DETERMINANT (1.e-8) |
| 465 | |
| 466 | static inline double dabs(double x) { |
| 467 | if (x < 0) { |
| 468 | x = -x; |
| 469 | } |
| 470 | return x; |
| 471 | } |
| 472 | |
| 473 | bool SkMatrix44::invert(SkMatrix44* inverse) const { |
mike@reedtribe.org | f8b1ebc | 2012-12-10 03:27:47 +0000 | [diff] [blame] | 474 | if (this->isIdentity()) { |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 475 | if (inverse) { |
| 476 | *inverse = *this; |
| 477 | return true; |
| 478 | } |
| 479 | } |
mike@reedtribe.org | f8b1ebc | 2012-12-10 03:27:47 +0000 | [diff] [blame] | 480 | if (this->isTranslate()) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 481 | if (inverse) { |
| 482 | inverse->setTranslate(-fMat[3][0], -fMat[3][1], -fMat[3][2]); |
| 483 | } |
| 484 | return true; |
| 485 | } |
mike@reedtribe.org | f8b1ebc | 2012-12-10 03:27:47 +0000 | [diff] [blame] | 486 | if (this->isScaleTranslate()) { |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 487 | if (0 == fMat[0][0] * fMat[1][1] * fMat[2][2]) { |
| 488 | return false; |
| 489 | } |
| 490 | if (inverse) { |
| 491 | sk_bzero(inverse->fMat, sizeof(inverse->fMat)); |
| 492 | |
| 493 | inverse->fMat[3][0] = -fMat[3][0] / fMat[0][0]; |
| 494 | inverse->fMat[3][1] = -fMat[3][1] / fMat[1][1]; |
| 495 | inverse->fMat[3][2] = -fMat[3][2] / fMat[2][2]; |
| 496 | |
| 497 | inverse->fMat[0][0] = 1 / fMat[0][0]; |
| 498 | inverse->fMat[1][1] = 1 / fMat[1][1]; |
| 499 | inverse->fMat[2][2] = 1 / fMat[2][2]; |
| 500 | inverse->fMat[3][3] = 1; |
| 501 | |
mike@reedtribe.org | f8b1ebc | 2012-12-10 03:27:47 +0000 | [diff] [blame] | 502 | inverse->setTypeMask(this->getType()); |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 503 | } |
| 504 | return true; |
| 505 | } |
| 506 | |
tomhudson@google.com | 9973a8a | 2012-12-13 09:55:42 +0000 | [diff] [blame] | 507 | double a00 = fMat[0][0]; |
| 508 | double a01 = fMat[0][1]; |
| 509 | double a02 = fMat[0][2]; |
| 510 | double a03 = fMat[0][3]; |
| 511 | double a10 = fMat[1][0]; |
| 512 | double a11 = fMat[1][1]; |
| 513 | double a12 = fMat[1][2]; |
| 514 | double a13 = fMat[1][3]; |
| 515 | double a20 = fMat[2][0]; |
| 516 | double a21 = fMat[2][1]; |
| 517 | double a22 = fMat[2][2]; |
| 518 | double a23 = fMat[2][3]; |
| 519 | double a30 = fMat[3][0]; |
| 520 | double a31 = fMat[3][1]; |
| 521 | double a32 = fMat[3][2]; |
| 522 | double a33 = fMat[3][3]; |
| 523 | |
| 524 | double b00 = a00 * a11 - a01 * a10; |
| 525 | double b01 = a00 * a12 - a02 * a10; |
| 526 | double b02 = a00 * a13 - a03 * a10; |
| 527 | double b03 = a01 * a12 - a02 * a11; |
| 528 | double b04 = a01 * a13 - a03 * a11; |
| 529 | double b05 = a02 * a13 - a03 * a12; |
| 530 | double b06 = a20 * a31 - a21 * a30; |
| 531 | double b07 = a20 * a32 - a22 * a30; |
| 532 | double b08 = a20 * a33 - a23 * a30; |
| 533 | double b09 = a21 * a32 - a22 * a31; |
| 534 | double b10 = a21 * a33 - a23 * a31; |
| 535 | double b11 = a22 * a33 - a23 * a32; |
| 536 | |
| 537 | // Calculate the determinant |
| 538 | double det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06; |
| 539 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 540 | if (dabs(det) < TOO_SMALL_FOR_DETERMINANT) { |
| 541 | return false; |
| 542 | } |
| 543 | if (NULL == inverse) { |
| 544 | return true; |
| 545 | } |
tomhudson@google.com | 9973a8a | 2012-12-13 09:55:42 +0000 | [diff] [blame] | 546 | double invdet = 1.0 / det; |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 547 | |
tomhudson@google.com | 9973a8a | 2012-12-13 09:55:42 +0000 | [diff] [blame] | 548 | b00 *= invdet; |
| 549 | b01 *= invdet; |
| 550 | b02 *= invdet; |
| 551 | b03 *= invdet; |
| 552 | b04 *= invdet; |
| 553 | b05 *= invdet; |
| 554 | b06 *= invdet; |
| 555 | b07 *= invdet; |
| 556 | b08 *= invdet; |
| 557 | b09 *= invdet; |
| 558 | b10 *= invdet; |
| 559 | b11 *= invdet; |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 560 | |
tomhudson@google.com | 9973a8a | 2012-12-13 09:55:42 +0000 | [diff] [blame] | 561 | inverse->fMat[0][0] = SkDoubleToMScalar(a11 * b11 - a12 * b10 + a13 * b09); |
| 562 | inverse->fMat[0][1] = SkDoubleToMScalar(a02 * b10 - a01 * b11 - a03 * b09); |
| 563 | inverse->fMat[0][2] = SkDoubleToMScalar(a31 * b05 - a32 * b04 + a33 * b03); |
| 564 | inverse->fMat[0][3] = SkDoubleToMScalar(a22 * b04 - a21 * b05 - a23 * b03); |
| 565 | inverse->fMat[1][0] = SkDoubleToMScalar(a12 * b08 - a10 * b11 - a13 * b07); |
| 566 | inverse->fMat[1][1] = SkDoubleToMScalar(a00 * b11 - a02 * b08 + a03 * b07); |
| 567 | inverse->fMat[1][2] = SkDoubleToMScalar(a32 * b02 - a30 * b05 - a33 * b01); |
| 568 | inverse->fMat[1][3] = SkDoubleToMScalar(a20 * b05 - a22 * b02 + a23 * b01); |
| 569 | inverse->fMat[2][0] = SkDoubleToMScalar(a10 * b10 - a11 * b08 + a13 * b06); |
| 570 | inverse->fMat[2][1] = SkDoubleToMScalar(a01 * b08 - a00 * b10 - a03 * b06); |
| 571 | inverse->fMat[2][2] = SkDoubleToMScalar(a30 * b04 - a31 * b02 + a33 * b00); |
| 572 | inverse->fMat[2][3] = SkDoubleToMScalar(a21 * b02 - a20 * b04 - a23 * b00); |
| 573 | inverse->fMat[3][0] = SkDoubleToMScalar(a11 * b07 - a10 * b09 - a12 * b06); |
| 574 | inverse->fMat[3][1] = SkDoubleToMScalar(a00 * b09 - a01 * b07 + a02 * b06); |
| 575 | inverse->fMat[3][2] = SkDoubleToMScalar(a31 * b01 - a30 * b03 - a32 * b00); |
| 576 | inverse->fMat[3][3] = SkDoubleToMScalar(a20 * b03 - a21 * b01 + a22 * b00); |
| 577 | inverse->dirtyTypeMask(); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 578 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 579 | inverse->dirtyTypeMask(); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 580 | return true; |
| 581 | } |
| 582 | |
| 583 | /////////////////////////////////////////////////////////////////////////////// |
| 584 | |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 585 | void SkMatrix44::transpose() { |
| 586 | SkTSwap(fMat[0][1], fMat[1][0]); |
| 587 | SkTSwap(fMat[0][2], fMat[2][0]); |
| 588 | SkTSwap(fMat[0][3], fMat[3][0]); |
| 589 | SkTSwap(fMat[1][2], fMat[2][1]); |
| 590 | SkTSwap(fMat[1][3], fMat[3][1]); |
| 591 | SkTSwap(fMat[2][3], fMat[3][2]); |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 592 | |
| 593 | if (!this->isTriviallyIdentity()) { |
| 594 | this->dirtyTypeMask(); |
| 595 | } |
vollick@chromium.org | 9b21c25 | 2012-11-14 21:33:55 +0000 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | /////////////////////////////////////////////////////////////////////////////// |
| 599 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 600 | void SkMatrix44::mapScalars(const SkScalar src[4], SkScalar dst[4]) const { |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 601 | SkScalar storage[4]; |
| 602 | SkScalar* result = (src == dst) ? storage : dst; |
| 603 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 604 | for (int i = 0; i < 4; i++) { |
| 605 | SkMScalar value = 0; |
| 606 | for (int j = 0; j < 4; j++) { |
| 607 | value += fMat[j][i] * src[j]; |
| 608 | } |
bsalomon@google.com | 72e49b8 | 2011-10-27 21:47:03 +0000 | [diff] [blame] | 609 | result[i] = SkMScalarToScalar(value); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 610 | } |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 611 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 612 | if (storage == result) { |
| 613 | memcpy(dst, storage, sizeof(storage)); |
| 614 | } |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 615 | } |
| 616 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 617 | #ifdef SK_MSCALAR_IS_DOUBLE |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 618 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 619 | void SkMatrix44::mapMScalars(const SkMScalar src[4], SkMScalar dst[4]) const { |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 620 | SkMScalar storage[4]; |
| 621 | SkMScalar* result = (src == dst) ? storage : dst; |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 622 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 623 | for (int i = 0; i < 4; i++) { |
| 624 | SkMScalar value = 0; |
| 625 | for (int j = 0; j < 4; j++) { |
| 626 | value += fMat[j][i] * src[j]; |
| 627 | } |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 628 | result[i] = value; |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 629 | } |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 630 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 631 | if (storage == result) { |
| 632 | memcpy(dst, storage, sizeof(storage)); |
| 633 | } |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 634 | } |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 635 | |
reed@google.com | 1ea95be | 2012-11-09 21:39:48 +0000 | [diff] [blame] | 636 | #endif |
| 637 | |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 638 | typedef void (*Map2Procf)(const SkMScalar mat[][4], const float src2[], int count, float dst4[]); |
| 639 | typedef void (*Map2Procd)(const SkMScalar mat[][4], const double src2[], int count, double dst4[]); |
| 640 | |
| 641 | static void map2_if(const SkMScalar mat[][4], const float* SK_RESTRICT src2, |
| 642 | int count, float* SK_RESTRICT dst4) { |
| 643 | for (int i = 0; i < count; ++i) { |
| 644 | dst4[0] = src2[0]; |
| 645 | dst4[1] = src2[1]; |
| 646 | dst4[2] = 0; |
| 647 | dst4[3] = 1; |
| 648 | src2 += 2; |
| 649 | dst4 += 4; |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | static void map2_id(const SkMScalar mat[][4], const double* SK_RESTRICT src2, |
| 654 | int count, double* SK_RESTRICT dst4) { |
| 655 | for (int i = 0; i < count; ++i) { |
| 656 | dst4[0] = src2[0]; |
| 657 | dst4[1] = src2[1]; |
| 658 | dst4[2] = 0; |
| 659 | dst4[3] = 1; |
| 660 | src2 += 2; |
| 661 | dst4 += 4; |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | static void map2_tf(const SkMScalar mat[][4], const float* SK_RESTRICT src2, |
| 666 | int count, float* SK_RESTRICT dst4) { |
| 667 | const float mat30 = SkMScalarToFloat(mat[3][0]); |
| 668 | const float mat31 = SkMScalarToFloat(mat[3][1]); |
| 669 | const float mat32 = SkMScalarToFloat(mat[3][2]); |
| 670 | for (int n = 0; n < count; ++n) { |
| 671 | dst4[0] = src2[0] + mat30; |
| 672 | dst4[1] = src2[1] + mat31; |
| 673 | dst4[2] = mat32; |
| 674 | dst4[3] = 1; |
| 675 | src2 += 2; |
| 676 | dst4 += 4; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | static void map2_td(const SkMScalar mat[][4], const double* SK_RESTRICT src2, |
| 681 | int count, double* SK_RESTRICT dst4) { |
| 682 | for (int n = 0; n < count; ++n) { |
| 683 | dst4[0] = src2[0] + mat[3][0]; |
| 684 | dst4[1] = src2[1] + mat[3][1]; |
| 685 | dst4[2] = mat[3][2]; |
| 686 | dst4[3] = 1; |
| 687 | src2 += 2; |
| 688 | dst4 += 4; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | static void map2_sf(const SkMScalar mat[][4], const float* SK_RESTRICT src2, |
| 693 | int count, float* SK_RESTRICT dst4) { |
| 694 | const float mat32 = SkMScalarToFloat(mat[3][2]); |
| 695 | for (int n = 0; n < count; ++n) { |
| 696 | dst4[0] = SkMScalarToFloat(mat[0][0] * src2[0] + mat[3][0]); |
| 697 | dst4[1] = SkMScalarToFloat(mat[1][1] * src2[1] + mat[3][1]); |
| 698 | dst4[2] = mat32; |
| 699 | dst4[3] = 1; |
| 700 | src2 += 2; |
| 701 | dst4 += 4; |
| 702 | } |
| 703 | } |
| 704 | |
| 705 | static void map2_sd(const SkMScalar mat[][4], const double* SK_RESTRICT src2, |
| 706 | int count, double* SK_RESTRICT dst4) { |
| 707 | for (int n = 0; n < count; ++n) { |
| 708 | dst4[0] = mat[0][0] * src2[0] + mat[3][0]; |
| 709 | dst4[1] = mat[1][1] * src2[1] + mat[3][1]; |
| 710 | dst4[2] = mat[3][2]; |
| 711 | dst4[3] = 1; |
| 712 | src2 += 2; |
| 713 | dst4 += 4; |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | static void map2_af(const SkMScalar mat[][4], const float* SK_RESTRICT src2, |
| 718 | int count, float* SK_RESTRICT dst4) { |
| 719 | double r; |
| 720 | for (int n = 0; n < count; ++n) { |
| 721 | double sx = src2[0]; |
| 722 | double sy = src2[1]; |
| 723 | r = mat[0][0] * sx + mat[1][0] * sy + mat[3][0]; |
| 724 | dst4[0] = SkMScalarToFloat(r); |
| 725 | r = mat[0][1] * sx + mat[1][1] * sy + mat[3][1]; |
| 726 | dst4[1] = SkMScalarToFloat(r); |
| 727 | r = mat[0][2] * sx + mat[1][2] * sy + mat[3][2]; |
| 728 | dst4[2] = SkMScalarToFloat(r); |
| 729 | dst4[3] = 1; |
| 730 | src2 += 2; |
| 731 | dst4 += 4; |
| 732 | } |
| 733 | } |
| 734 | |
| 735 | static void map2_ad(const SkMScalar mat[][4], const double* SK_RESTRICT src2, |
| 736 | int count, double* SK_RESTRICT dst4) { |
| 737 | for (int n = 0; n < count; ++n) { |
| 738 | double sx = src2[0]; |
| 739 | double sy = src2[1]; |
| 740 | dst4[0] = mat[0][0] * sx + mat[1][0] * sy + mat[3][0]; |
| 741 | dst4[1] = mat[0][1] * sx + mat[1][1] * sy + mat[3][1]; |
| 742 | dst4[2] = mat[0][2] * sx + mat[1][2] * sy + mat[3][2]; |
| 743 | dst4[3] = 1; |
| 744 | src2 += 2; |
| 745 | dst4 += 4; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | static void map2_pf(const SkMScalar mat[][4], const float* SK_RESTRICT src2, |
| 750 | int count, float* SK_RESTRICT dst4) { |
| 751 | double r; |
| 752 | for (int n = 0; n < count; ++n) { |
| 753 | double sx = src2[0]; |
| 754 | double sy = src2[1]; |
| 755 | for (int i = 0; i < 4; i++) { |
| 756 | r = mat[0][i] * sx + mat[1][i] * sy + mat[3][i]; |
| 757 | dst4[i] = SkMScalarToFloat(r); |
| 758 | } |
| 759 | src2 += 2; |
| 760 | dst4 += 4; |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | static void map2_pd(const SkMScalar mat[][4], const double* SK_RESTRICT src2, |
| 765 | int count, double* SK_RESTRICT dst4) { |
| 766 | for (int n = 0; n < count; ++n) { |
| 767 | double sx = src2[0]; |
| 768 | double sy = src2[1]; |
| 769 | for (int i = 0; i < 4; i++) { |
| 770 | dst4[i] = mat[0][i] * sx + mat[1][i] * sy + mat[3][i]; |
| 771 | } |
| 772 | src2 += 2; |
| 773 | dst4 += 4; |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | void SkMatrix44::map2(const float src2[], int count, float dst4[]) const { |
| 778 | static const Map2Procf gProc[] = { |
| 779 | map2_if, map2_tf, map2_sf, map2_sf, map2_af, map2_af, map2_af, map2_af |
| 780 | }; |
| 781 | |
| 782 | TypeMask mask = this->getType(); |
| 783 | Map2Procf proc = (mask & kPerspective_Mask) ? map2_pf : gProc[mask]; |
| 784 | proc(fMat, src2, count, dst4); |
| 785 | } |
| 786 | |
| 787 | void SkMatrix44::map2(const double src2[], int count, double dst4[]) const { |
| 788 | static const Map2Procd gProc[] = { |
| 789 | map2_id, map2_td, map2_sd, map2_sd, map2_ad, map2_ad, map2_ad, map2_ad |
| 790 | }; |
skia.committer@gmail.com | 0264fb4 | 2012-12-06 02:01:25 +0000 | [diff] [blame] | 791 | |
reed@google.com | 99b5c7f | 2012-12-05 22:13:59 +0000 | [diff] [blame] | 792 | TypeMask mask = this->getType(); |
| 793 | Map2Procd proc = (mask & kPerspective_Mask) ? map2_pd : gProc[mask]; |
| 794 | proc(fMat, src2, count, dst4); |
| 795 | } |
| 796 | |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 797 | /////////////////////////////////////////////////////////////////////////////// |
| 798 | |
| 799 | void SkMatrix44::dump() const { |
tomhudson@google.com | 9ac4a89 | 2011-06-28 13:53:13 +0000 | [diff] [blame] | 800 | static const char* format = |
| 801 | "[%g %g %g %g][%g %g %g %g][%g %g %g %g][%g %g %g %g]\n"; |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 802 | #if 0 |
tomhudson@google.com | 9ac4a89 | 2011-06-28 13:53:13 +0000 | [diff] [blame] | 803 | SkDebugf(format, |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 804 | fMat[0][0], fMat[1][0], fMat[2][0], fMat[3][0], |
| 805 | fMat[0][1], fMat[1][1], fMat[2][1], fMat[3][1], |
| 806 | fMat[0][2], fMat[1][2], fMat[2][2], fMat[3][2], |
| 807 | fMat[0][3], fMat[1][3], fMat[2][3], fMat[3][3]); |
tomhudson@google.com | 9ac4a89 | 2011-06-28 13:53:13 +0000 | [diff] [blame] | 808 | #else |
| 809 | SkDebugf(format, |
| 810 | fMat[0][0], fMat[0][1], fMat[0][2], fMat[0][3], |
| 811 | fMat[1][0], fMat[1][1], fMat[1][2], fMat[1][3], |
| 812 | fMat[2][0], fMat[2][1], fMat[2][2], fMat[2][3], |
| 813 | fMat[3][0], fMat[3][1], fMat[3][2], fMat[3][3]); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 814 | #endif |
| 815 | } |
| 816 | |
| 817 | /////////////////////////////////////////////////////////////////////////////// |
| 818 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 819 | // TODO: make this support src' perspective elements |
| 820 | // |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 821 | static void initFromMatrix(SkMScalar dst[4][4], const SkMatrix& src) { |
| 822 | sk_bzero(dst, 16 * sizeof(SkMScalar)); |
bsalomon@google.com | 72e49b8 | 2011-10-27 21:47:03 +0000 | [diff] [blame] | 823 | dst[0][0] = SkScalarToMScalar(src[SkMatrix::kMScaleX]); |
| 824 | dst[1][0] = SkScalarToMScalar(src[SkMatrix::kMSkewX]); |
| 825 | dst[3][0] = SkScalarToMScalar(src[SkMatrix::kMTransX]); |
| 826 | dst[0][1] = SkScalarToMScalar(src[SkMatrix::kMSkewY]); |
| 827 | dst[1][1] = SkScalarToMScalar(src[SkMatrix::kMScaleY]); |
| 828 | dst[3][1] = SkScalarToMScalar(src[SkMatrix::kMTransY]); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 829 | dst[2][2] = dst[3][3] = 1; |
| 830 | } |
| 831 | |
| 832 | SkMatrix44::SkMatrix44(const SkMatrix& src) { |
| 833 | initFromMatrix(fMat, src); |
| 834 | } |
| 835 | |
| 836 | SkMatrix44& SkMatrix44::operator=(const SkMatrix& src) { |
| 837 | initFromMatrix(fMat, src); |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 838 | |
| 839 | if (src.isIdentity()) { |
| 840 | this->setTypeMask(kIdentity_Mask); |
| 841 | } else { |
| 842 | this->dirtyTypeMask(); |
| 843 | } |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 844 | return *this; |
| 845 | } |
| 846 | |
reed@google.com | 7d68335 | 2012-12-03 21:19:52 +0000 | [diff] [blame] | 847 | // TODO: make this support our perspective elements |
| 848 | // |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 849 | SkMatrix44::operator SkMatrix() const { |
| 850 | SkMatrix dst; |
| 851 | dst.reset(); // setup our perspective correctly for identity |
| 852 | |
bsalomon@google.com | 72e49b8 | 2011-10-27 21:47:03 +0000 | [diff] [blame] | 853 | dst[SkMatrix::kMScaleX] = SkMScalarToScalar(fMat[0][0]); |
| 854 | dst[SkMatrix::kMSkewX] = SkMScalarToScalar(fMat[1][0]); |
| 855 | dst[SkMatrix::kMTransX] = SkMScalarToScalar(fMat[3][0]); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 856 | |
bsalomon@google.com | 72e49b8 | 2011-10-27 21:47:03 +0000 | [diff] [blame] | 857 | dst[SkMatrix::kMSkewY] = SkMScalarToScalar(fMat[0][1]); |
| 858 | dst[SkMatrix::kMScaleY] = SkMScalarToScalar(fMat[1][1]); |
| 859 | dst[SkMatrix::kMTransY] = SkMScalarToScalar(fMat[3][1]); |
reed@google.com | 8260a89 | 2011-06-13 14:02:52 +0000 | [diff] [blame] | 860 | |
| 861 | return dst; |
| 862 | } |