epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 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. |
| 7 | */ |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | #include "SkBitmapProcState.h" |
| 9 | #include "SkColorPriv.h" |
| 10 | #include "SkFilterProc.h" |
| 11 | #include "SkPaint.h" |
| 12 | #include "SkShader.h" // for tilemodes |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 13 | #include "SkUtilsArm.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 14 | |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 15 | #if !SK_ARM_NEON_IS_NONE |
| 16 | // These are defined in src/opts/SkBitmapProcState_arm_neon.cpp |
| 17 | extern const SkBitmapProcState::SampleProc16 gSkBitmapProcStateSample16_neon[]; |
| 18 | extern const SkBitmapProcState::SampleProc32 gSkBitmapProcStateSample32_neon[]; |
| 19 | extern void S16_D16_filter_DX_neon(const SkBitmapProcState&, const uint32_t*, int, uint16_t*); |
| 20 | extern void Clamp_S16_D16_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint16_t*, int); |
| 21 | extern void Repeat_S16_D16_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint16_t*, int); |
| 22 | extern void SI8_opaque_D32_filter_DX_neon(const SkBitmapProcState&, const uint32_t*, int, SkPMColor*); |
| 23 | extern void SI8_opaque_D32_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint32_t*, int); |
| 24 | extern void Clamp_SI8_opaque_D32_filter_DX_shaderproc_neon(const SkBitmapProcState&, int, int, uint32_t*, int); |
| 25 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 26 | |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 27 | #if !SK_ARM_NEON_IS_ALWAYS |
| 28 | #define NAME_WRAP(x) x |
| 29 | #include "SkBitmapProcState_filter.h" |
| 30 | #include "SkBitmapProcState_procs.h" |
| 31 | #endif |
reed@android.com | b577b41 | 2009-10-27 17:49:32 +0000 | [diff] [blame] | 32 | |
reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 33 | /////////////////////////////////////////////////////////////////////////////// |
| 34 | |
reed@google.com | c0e88e0 | 2012-10-17 21:11:56 +0000 | [diff] [blame] | 35 | /** |
| 36 | * For the purposes of drawing bitmaps, if a matrix is "almost" translate |
| 37 | * go ahead and treat it as if it were, so that subsequent code can go fast. |
| 38 | */ |
| 39 | static bool just_trans_clamp(const SkMatrix& matrix, const SkBitmap& bitmap) { |
| 40 | SkMatrix::TypeMask mask = matrix.getType(); |
| 41 | |
| 42 | if (mask & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) { |
| 43 | return false; |
| 44 | } |
| 45 | if (mask & SkMatrix::kScale_Mask) { |
| 46 | SkScalar sx = matrix[SkMatrix::kMScaleX]; |
| 47 | SkScalar sy = matrix[SkMatrix::kMScaleY]; |
| 48 | int w = bitmap.width(); |
| 49 | int h = bitmap.height(); |
| 50 | int sw = SkScalarRound(SkScalarMul(sx, SkIntToScalar(w))); |
| 51 | int sh = SkScalarRound(SkScalarMul(sy, SkIntToScalar(h))); |
| 52 | return sw == w && sh == h; |
| 53 | } |
| 54 | // if we got here, we're either kTranslate_Mask or identity |
| 55 | return true; |
| 56 | } |
| 57 | |
| 58 | static bool just_trans_general(const SkMatrix& matrix) { |
| 59 | SkMatrix::TypeMask mask = matrix.getType(); |
| 60 | |
| 61 | if (mask & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) { |
| 62 | return false; |
| 63 | } |
| 64 | if (mask & SkMatrix::kScale_Mask) { |
| 65 | const SkScalar tol = SK_Scalar1 / 32768; |
skia.committer@gmail.com | 989a95e | 2012-10-18 02:01:23 +0000 | [diff] [blame] | 66 | |
reed@google.com | c0e88e0 | 2012-10-17 21:11:56 +0000 | [diff] [blame] | 67 | if (!SkScalarNearlyZero(matrix[SkMatrix::kMScaleX] - SK_Scalar1, tol)) { |
| 68 | return false; |
| 69 | } |
| 70 | if (!SkScalarNearlyZero(matrix[SkMatrix::kMScaleY] - SK_Scalar1, tol)) { |
| 71 | return false; |
| 72 | } |
| 73 | } |
| 74 | // if we got here, treat us as either kTranslate_Mask or identity |
| 75 | return true; |
| 76 | } |
| 77 | |
| 78 | /////////////////////////////////////////////////////////////////////////////// |
| 79 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 80 | static bool valid_for_filtering(unsigned dimension) { |
| 81 | // for filtering, width and height must fit in 14bits, since we use steal |
| 82 | // 2 bits from each to store our 4bit subpixel data |
| 83 | return (dimension & ~0x3FFF) == 0; |
| 84 | } |
| 85 | |
| 86 | bool SkBitmapProcState::chooseProcs(const SkMatrix& inv, const SkPaint& paint) { |
| 87 | if (fOrigBitmap.width() == 0 || fOrigBitmap.height() == 0) { |
| 88 | return false; |
| 89 | } |
reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 90 | |
reed@android.com | 07d1f00 | 2009-08-13 19:35:48 +0000 | [diff] [blame] | 91 | const SkMatrix* m; |
| 92 | bool trivial_matrix = (inv.getType() & ~SkMatrix::kTranslate_Mask) == 0; |
| 93 | bool clamp_clamp = SkShader::kClamp_TileMode == fTileModeX && |
robertphillips@google.com | 8b8bf4d | 2013-01-18 16:38:40 +0000 | [diff] [blame^] | 94 | SkShader::kClamp_TileMode == fTileModeY; |
reed@android.com | 07d1f00 | 2009-08-13 19:35:48 +0000 | [diff] [blame] | 95 | |
| 96 | if (clamp_clamp || trivial_matrix) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 97 | m = &inv; |
| 98 | } else { |
| 99 | fUnitInvMatrix = inv; |
| 100 | fUnitInvMatrix.postIDiv(fOrigBitmap.width(), fOrigBitmap.height()); |
| 101 | m = &fUnitInvMatrix; |
| 102 | } |
reed@android.com | 07d1f00 | 2009-08-13 19:35:48 +0000 | [diff] [blame] | 103 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 104 | fBitmap = &fOrigBitmap; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 105 | if (fOrigBitmap.hasMipMap()) { |
| 106 | int shift = fOrigBitmap.extractMipLevel(&fMipBitmap, |
| 107 | SkScalarToFixed(m->getScaleX()), |
| 108 | SkScalarToFixed(m->getSkewY())); |
skia.committer@gmail.com | 989a95e | 2012-10-18 02:01:23 +0000 | [diff] [blame] | 109 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 110 | if (shift > 0) { |
| 111 | if (m != &fUnitInvMatrix) { |
| 112 | fUnitInvMatrix = *m; |
| 113 | m = &fUnitInvMatrix; |
| 114 | } |
| 115 | |
| 116 | SkScalar scale = SkFixedToScalar(SK_Fixed1 >> shift); |
| 117 | fUnitInvMatrix.postScale(scale, scale); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 118 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 119 | // now point here instead of fOrigBitmap |
| 120 | fBitmap = &fMipBitmap; |
| 121 | } |
| 122 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 123 | |
reed@google.com | c0e88e0 | 2012-10-17 21:11:56 +0000 | [diff] [blame] | 124 | // wack our matrix to exactly no-scale, if we're really close to begin with |
| 125 | { |
| 126 | bool fixupMatrix = clamp_clamp ? |
| 127 | just_trans_clamp(*m, *fBitmap) : just_trans_general(*m); |
| 128 | if (fixupMatrix) { |
reed@google.com | ce1f3cc | 2013-01-05 14:37:48 +0000 | [diff] [blame] | 129 | #ifdef SK_IGNORE_TRANS_CLAMP_FIX |
reed@google.com | c0e88e0 | 2012-10-17 21:11:56 +0000 | [diff] [blame] | 130 | if (m != &fUnitInvMatrix) { // can't mutate the original |
| 131 | fUnitInvMatrix = inv; |
| 132 | m = &fUnitInvMatrix; |
| 133 | } |
| 134 | fUnitInvMatrix.set(SkMatrix::kMScaleX, SK_Scalar1); |
| 135 | fUnitInvMatrix.set(SkMatrix::kMScaleY, SK_Scalar1); |
reed@google.com | ce1f3cc | 2013-01-05 14:37:48 +0000 | [diff] [blame] | 136 | #else |
| 137 | // If we can be treated just like translate, construct that inverse |
| 138 | // such that we landed in the proper place. Given that m may have |
| 139 | // some slight scale, we have to invert it to compute this new |
| 140 | // matrix. |
| 141 | SkMatrix forward; |
| 142 | if (m->invert(&forward)) { |
| 143 | SkScalar tx = -SkScalarRoundToScalar(forward.getTranslateX()); |
| 144 | SkScalar ty = -SkScalarRoundToScalar(forward.getTranslateY()); |
| 145 | fUnitInvMatrix.setTranslate(tx, ty); |
| 146 | m = &fUnitInvMatrix; |
| 147 | // now the following code will sniff m, and decide to take the |
| 148 | // fast case (since m is purely translate). |
| 149 | } |
| 150 | #endif |
reed@google.com | c0e88e0 | 2012-10-17 21:11:56 +0000 | [diff] [blame] | 151 | } |
| 152 | } |
| 153 | |
| 154 | // Below this point, we should never refer to the inv parameter, since we |
| 155 | // may be using a munged version for "our" inverse. |
skia.committer@gmail.com | 989a95e | 2012-10-18 02:01:23 +0000 | [diff] [blame] | 156 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 157 | fInvMatrix = m; |
| 158 | fInvProc = m->getMapXYProc(); |
| 159 | fInvType = m->getType(); |
| 160 | fInvSx = SkScalarToFixed(m->getScaleX()); |
reed@google.com | 4bc0a9d | 2012-03-07 21:47:41 +0000 | [diff] [blame] | 161 | fInvSxFractionalInt = SkScalarToFractionalInt(m->getScaleX()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 162 | fInvKy = SkScalarToFixed(m->getSkewY()); |
reed@google.com | 411215a | 2012-03-08 20:13:46 +0000 | [diff] [blame] | 163 | fInvKyFractionalInt = SkScalarToFractionalInt(m->getSkewY()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 164 | |
| 165 | fAlphaScale = SkAlpha255To256(paint.getAlpha()); |
| 166 | |
| 167 | // pick-up filtering from the paint, but only if the matrix is |
| 168 | // more complex than identity/translate (i.e. no need to pay the cost |
| 169 | // of filtering if we're not scaled etc.). |
| 170 | // note: we explicitly check inv, since m might be scaled due to unitinv |
| 171 | // trickery, but we don't want to see that for this test |
| 172 | fDoFilter = paint.isFilterBitmap() && |
reed@google.com | c0e88e0 | 2012-10-17 21:11:56 +0000 | [diff] [blame] | 173 | (fInvType > SkMatrix::kTranslate_Mask && |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 174 | valid_for_filtering(fBitmap->width() | fBitmap->height())); |
| 175 | |
reed@android.com | 7a99eb1 | 2009-07-16 01:13:14 +0000 | [diff] [blame] | 176 | fShaderProc32 = NULL; |
| 177 | fShaderProc16 = NULL; |
| 178 | fSampleProc32 = NULL; |
| 179 | fSampleProc16 = NULL; |
reed@android.com | 48534f9 | 2009-07-16 20:53:26 +0000 | [diff] [blame] | 180 | |
reed@android.com | 07d1f00 | 2009-08-13 19:35:48 +0000 | [diff] [blame] | 181 | fMatrixProc = this->chooseMatrixProc(trivial_matrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 182 | if (NULL == fMatrixProc) { |
| 183 | return false; |
| 184 | } |
| 185 | |
| 186 | /////////////////////////////////////////////////////////////////////// |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 187 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 188 | int index = 0; |
| 189 | if (fAlphaScale < 256) { // note: this distinction is not used for D16 |
| 190 | index |= 1; |
| 191 | } |
| 192 | if (fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) { |
| 193 | index |= 2; |
| 194 | } |
| 195 | if (fDoFilter) { |
| 196 | index |= 4; |
| 197 | } |
| 198 | // bits 3,4,5 encoding the source bitmap format |
| 199 | switch (fBitmap->config()) { |
| 200 | case SkBitmap::kARGB_8888_Config: |
| 201 | index |= 0; |
| 202 | break; |
| 203 | case SkBitmap::kRGB_565_Config: |
| 204 | index |= 8; |
| 205 | break; |
| 206 | case SkBitmap::kIndex8_Config: |
| 207 | index |= 16; |
| 208 | break; |
| 209 | case SkBitmap::kARGB_4444_Config: |
| 210 | index |= 24; |
| 211 | break; |
| 212 | case SkBitmap::kA8_Config: |
| 213 | index |= 32; |
| 214 | fPaintPMColor = SkPreMultiplyColor(paint.getColor()); |
reed@android.com | 3469c76 | 2009-02-24 19:03:20 +0000 | [diff] [blame] | 215 | break; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 216 | default: |
| 217 | return false; |
| 218 | } |
| 219 | |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 220 | #if !SK_ARM_NEON_IS_ALWAYS |
| 221 | static const SampleProc32 gSkBitmapProcStateSample32[] = { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 222 | S32_opaque_D32_nofilter_DXDY, |
| 223 | S32_alpha_D32_nofilter_DXDY, |
| 224 | S32_opaque_D32_nofilter_DX, |
| 225 | S32_alpha_D32_nofilter_DX, |
| 226 | S32_opaque_D32_filter_DXDY, |
| 227 | S32_alpha_D32_filter_DXDY, |
| 228 | S32_opaque_D32_filter_DX, |
| 229 | S32_alpha_D32_filter_DX, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 230 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 231 | S16_opaque_D32_nofilter_DXDY, |
| 232 | S16_alpha_D32_nofilter_DXDY, |
| 233 | S16_opaque_D32_nofilter_DX, |
| 234 | S16_alpha_D32_nofilter_DX, |
| 235 | S16_opaque_D32_filter_DXDY, |
| 236 | S16_alpha_D32_filter_DXDY, |
| 237 | S16_opaque_D32_filter_DX, |
| 238 | S16_alpha_D32_filter_DX, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 239 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 240 | SI8_opaque_D32_nofilter_DXDY, |
| 241 | SI8_alpha_D32_nofilter_DXDY, |
| 242 | SI8_opaque_D32_nofilter_DX, |
| 243 | SI8_alpha_D32_nofilter_DX, |
| 244 | SI8_opaque_D32_filter_DXDY, |
| 245 | SI8_alpha_D32_filter_DXDY, |
| 246 | SI8_opaque_D32_filter_DX, |
| 247 | SI8_alpha_D32_filter_DX, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 248 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 249 | S4444_opaque_D32_nofilter_DXDY, |
| 250 | S4444_alpha_D32_nofilter_DXDY, |
| 251 | S4444_opaque_D32_nofilter_DX, |
| 252 | S4444_alpha_D32_nofilter_DX, |
| 253 | S4444_opaque_D32_filter_DXDY, |
| 254 | S4444_alpha_D32_filter_DXDY, |
| 255 | S4444_opaque_D32_filter_DX, |
| 256 | S4444_alpha_D32_filter_DX, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 257 | |
robertphillips@google.com | 8b8bf4d | 2013-01-18 16:38:40 +0000 | [diff] [blame^] | 258 | // A8 treats alpha/opaque the same (equally efficient) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 259 | SA8_alpha_D32_nofilter_DXDY, |
| 260 | SA8_alpha_D32_nofilter_DXDY, |
| 261 | SA8_alpha_D32_nofilter_DX, |
| 262 | SA8_alpha_D32_nofilter_DX, |
| 263 | SA8_alpha_D32_filter_DXDY, |
| 264 | SA8_alpha_D32_filter_DXDY, |
| 265 | SA8_alpha_D32_filter_DX, |
| 266 | SA8_alpha_D32_filter_DX |
| 267 | }; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 268 | |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 269 | static const SampleProc16 gSkBitmapProcStateSample16[] = { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 270 | S32_D16_nofilter_DXDY, |
| 271 | S32_D16_nofilter_DX, |
| 272 | S32_D16_filter_DXDY, |
| 273 | S32_D16_filter_DX, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 274 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 275 | S16_D16_nofilter_DXDY, |
| 276 | S16_D16_nofilter_DX, |
| 277 | S16_D16_filter_DXDY, |
| 278 | S16_D16_filter_DX, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 279 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 280 | SI8_D16_nofilter_DXDY, |
| 281 | SI8_D16_nofilter_DX, |
| 282 | SI8_D16_filter_DXDY, |
| 283 | SI8_D16_filter_DX, |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 284 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 285 | // Don't support 4444 -> 565 |
| 286 | NULL, NULL, NULL, NULL, |
| 287 | // Don't support A8 -> 565 |
| 288 | NULL, NULL, NULL, NULL |
| 289 | }; |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 290 | #endif |
reed@android.com | 48534f9 | 2009-07-16 20:53:26 +0000 | [diff] [blame] | 291 | |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 292 | fSampleProc32 = SK_ARM_NEON_WRAP(gSkBitmapProcStateSample32)[index]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 293 | index >>= 1; // shift away any opaque/alpha distinction |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 294 | fSampleProc16 = SK_ARM_NEON_WRAP(gSkBitmapProcStateSample16)[index]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 295 | |
reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 296 | // our special-case shaderprocs |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 297 | if (SK_ARM_NEON_WRAP(S16_D16_filter_DX) == fSampleProc16) { |
reed@android.com | aa9152a | 2009-07-17 21:24:56 +0000 | [diff] [blame] | 298 | if (clamp_clamp) { |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 299 | fShaderProc16 = SK_ARM_NEON_WRAP(Clamp_S16_D16_filter_DX_shaderproc); |
reed@android.com | aa9152a | 2009-07-17 21:24:56 +0000 | [diff] [blame] | 300 | } else if (SkShader::kRepeat_TileMode == fTileModeX && |
| 301 | SkShader::kRepeat_TileMode == fTileModeY) { |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 302 | fShaderProc16 = SK_ARM_NEON_WRAP(Repeat_S16_D16_filter_DX_shaderproc); |
reed@android.com | aa9152a | 2009-07-17 21:24:56 +0000 | [diff] [blame] | 303 | } |
digit@google.com | 3ada0ef | 2012-08-13 14:06:34 +0000 | [diff] [blame] | 304 | } else if (SK_ARM_NEON_WRAP(SI8_opaque_D32_filter_DX) == fSampleProc32 && clamp_clamp) { |
| 305 | fShaderProc32 = SK_ARM_NEON_WRAP(Clamp_SI8_opaque_D32_filter_DX_shaderproc); |
reed@android.com | a44b4cc | 2009-07-16 02:03:58 +0000 | [diff] [blame] | 306 | } |
reed@android.com | c9a1d4b | 2009-08-03 15:05:55 +0000 | [diff] [blame] | 307 | |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 308 | if (NULL == fShaderProc32) { |
| 309 | fShaderProc32 = this->chooseShaderProc32(); |
| 310 | } |
| 311 | |
reed@android.com | c9a1d4b | 2009-08-03 15:05:55 +0000 | [diff] [blame] | 312 | // see if our platform has any accelerated overrides |
| 313 | this->platformProcs(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 314 | return true; |
| 315 | } |
| 316 | |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 317 | static void Clamp_S32_D32_nofilter_trans_shaderproc(const SkBitmapProcState& s, |
| 318 | int x, int y, |
| 319 | SkPMColor* SK_RESTRICT colors, |
| 320 | int count) { |
| 321 | SkASSERT(((s.fInvType & ~SkMatrix::kTranslate_Mask)) == 0); |
| 322 | SkASSERT(s.fInvKy == 0); |
| 323 | SkASSERT(count > 0 && colors != NULL); |
| 324 | SkASSERT(!s.fDoFilter); |
skia.committer@gmail.com | 20c301b | 2012-10-17 02:01:13 +0000 | [diff] [blame] | 325 | |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 326 | const int maxX = s.fBitmap->width() - 1; |
reed@google.com | f7698de | 2012-10-12 20:50:24 +0000 | [diff] [blame] | 327 | const int maxY = s.fBitmap->height() - 1; |
| 328 | int ix = s.fFilterOneX + x; |
| 329 | int iy = SkClampMax(s.fFilterOneY + y, maxY); |
| 330 | #ifdef SK_DEBUG |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 331 | { |
| 332 | SkPoint pt; |
| 333 | s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf, |
| 334 | SkIntToScalar(y) + SK_ScalarHalf, &pt); |
reed@google.com | f7698de | 2012-10-12 20:50:24 +0000 | [diff] [blame] | 335 | int iy2 = SkClampMax(SkScalarFloorToInt(pt.fY), maxY); |
| 336 | int ix2 = SkScalarFloorToInt(pt.fX); |
skia.committer@gmail.com | 20c301b | 2012-10-17 02:01:13 +0000 | [diff] [blame] | 337 | |
reed@google.com | f7698de | 2012-10-12 20:50:24 +0000 | [diff] [blame] | 338 | SkASSERT(iy == iy2); |
| 339 | SkASSERT(ix == ix2); |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 340 | } |
reed@google.com | f7698de | 2012-10-12 20:50:24 +0000 | [diff] [blame] | 341 | #endif |
| 342 | const SkPMColor* row = s.fBitmap->getAddr32(0, iy); |
skia.committer@gmail.com | 20c301b | 2012-10-17 02:01:13 +0000 | [diff] [blame] | 343 | |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 344 | // clamp to the left |
| 345 | if (ix < 0) { |
| 346 | int n = SkMin32(-ix, count); |
| 347 | sk_memset32(colors, row[0], n); |
| 348 | count -= n; |
| 349 | if (0 == count) { |
| 350 | return; |
| 351 | } |
| 352 | colors += n; |
| 353 | SkASSERT(-ix == n); |
| 354 | ix = 0; |
| 355 | } |
| 356 | // copy the middle |
| 357 | if (ix <= maxX) { |
| 358 | int n = SkMin32(maxX - ix + 1, count); |
| 359 | memcpy(colors, row + ix, n * sizeof(SkPMColor)); |
| 360 | count -= n; |
| 361 | if (0 == count) { |
| 362 | return; |
| 363 | } |
| 364 | colors += n; |
| 365 | } |
| 366 | SkASSERT(count > 0); |
| 367 | // clamp to the right |
| 368 | sk_memset32(colors, row[maxX], count); |
| 369 | } |
| 370 | |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 371 | static inline int sk_int_mod(int x, int n) { |
| 372 | SkASSERT(n > 0); |
| 373 | if ((unsigned)x >= (unsigned)n) { |
| 374 | if (x < 0) { |
| 375 | x = n + ~(~x % n); |
| 376 | } else { |
| 377 | x = x % n; |
| 378 | } |
| 379 | } |
| 380 | return x; |
| 381 | } |
| 382 | |
robertphillips@google.com | 8b8bf4d | 2013-01-18 16:38:40 +0000 | [diff] [blame^] | 383 | static inline int sk_int_mirror(int x, int n) { |
| 384 | x = sk_int_mod(x, 2 * n); |
| 385 | if (x >= n) { |
| 386 | x = n + ~(x - n); |
| 387 | } |
| 388 | return x; |
| 389 | } |
| 390 | |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 391 | static void Repeat_S32_D32_nofilter_trans_shaderproc(const SkBitmapProcState& s, |
| 392 | int x, int y, |
| 393 | SkPMColor* SK_RESTRICT colors, |
| 394 | int count) { |
| 395 | SkASSERT(((s.fInvType & ~SkMatrix::kTranslate_Mask)) == 0); |
| 396 | SkASSERT(s.fInvKy == 0); |
| 397 | SkASSERT(count > 0 && colors != NULL); |
| 398 | SkASSERT(!s.fDoFilter); |
skia.committer@gmail.com | 20c301b | 2012-10-17 02:01:13 +0000 | [diff] [blame] | 399 | |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 400 | const int stopX = s.fBitmap->width(); |
| 401 | const int stopY = s.fBitmap->height(); |
| 402 | int ix = s.fFilterOneX + x; |
| 403 | int iy = sk_int_mod(s.fFilterOneY + y, stopY); |
| 404 | #ifdef SK_DEBUG |
| 405 | { |
| 406 | SkPoint pt; |
| 407 | s.fInvProc(*s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf, |
| 408 | SkIntToScalar(y) + SK_ScalarHalf, &pt); |
| 409 | int iy2 = sk_int_mod(SkScalarFloorToInt(pt.fY), stopY); |
| 410 | int ix2 = SkScalarFloorToInt(pt.fX); |
skia.committer@gmail.com | 20c301b | 2012-10-17 02:01:13 +0000 | [diff] [blame] | 411 | |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 412 | SkASSERT(iy == iy2); |
| 413 | SkASSERT(ix == ix2); |
| 414 | } |
| 415 | #endif |
| 416 | const SkPMColor* row = s.fBitmap->getAddr32(0, iy); |
| 417 | |
| 418 | ix = sk_int_mod(ix, stopX); |
| 419 | for (;;) { |
| 420 | int n = SkMin32(stopX - ix, count); |
| 421 | memcpy(colors, row + ix, n * sizeof(SkPMColor)); |
| 422 | count -= n; |
| 423 | if (0 == count) { |
| 424 | return; |
| 425 | } |
| 426 | colors += n; |
| 427 | ix = 0; |
| 428 | } |
| 429 | } |
| 430 | |
robertphillips@google.com | 8b8bf4d | 2013-01-18 16:38:40 +0000 | [diff] [blame^] | 431 | static void S32_D32_constX_shaderproc(const SkBitmapProcState& s, |
| 432 | int x, int y, |
| 433 | SkPMColor* SK_RESTRICT colors, |
| 434 | int count) { |
| 435 | SkASSERT((s.fInvType & ~(SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) == 0); |
| 436 | SkASSERT(s.fInvKy == 0); |
| 437 | SkASSERT(count > 0 && colors != NULL); |
| 438 | SkASSERT(1 == s.fBitmap->width()); |
| 439 | |
| 440 | int iY0, iY1, iSubY; |
| 441 | |
| 442 | if (s.fDoFilter) { |
| 443 | SkBitmapProcState::MatrixProc mproc = s.getMatrixProc(); |
| 444 | uint32_t xy[2]; |
| 445 | |
| 446 | mproc(s, xy, 1, x, y); |
| 447 | |
| 448 | iY0 = xy[0] >> 18; |
| 449 | iY1 = xy[0] & 0x3FFF; |
| 450 | iSubY = (xy[0] >> 14) & 0xF; |
| 451 | } else { |
| 452 | int yTemp; |
| 453 | |
| 454 | if (s.fInvType > SkMatrix::kTranslate_Mask) { |
| 455 | SkPoint pt; |
| 456 | s.fInvProc(*s.fInvMatrix, |
| 457 | SkIntToScalar(x) + SK_ScalarHalf, |
| 458 | SkIntToScalar(y) + SK_ScalarHalf, |
| 459 | &pt); |
| 460 | yTemp = SkScalarFloorToInt(pt.fY); |
| 461 | } else { |
| 462 | yTemp = s.fFilterOneY + y; |
| 463 | } |
| 464 | |
| 465 | const int stopY = s.fBitmap->height(); |
| 466 | switch (s.fTileModeY) { |
| 467 | case SkShader::kClamp_TileMode: |
| 468 | iY0 = SkClampMax(yTemp, stopY-1); |
| 469 | break; |
| 470 | case SkShader::kRepeat_TileMode: |
| 471 | iY0 = sk_int_mod(yTemp, stopY); |
| 472 | break; |
| 473 | case SkShader::kMirror_TileMode: |
| 474 | default: |
| 475 | iY0 = sk_int_mirror(yTemp, stopY); |
| 476 | break; |
| 477 | } |
| 478 | |
| 479 | #ifdef SK_DEBUG |
| 480 | { |
| 481 | SkPoint pt; |
| 482 | s.fInvProc(*s.fInvMatrix, |
| 483 | SkIntToScalar(x) + SK_ScalarHalf, |
| 484 | SkIntToScalar(y) + SK_ScalarHalf, |
| 485 | &pt); |
| 486 | int iY2; |
| 487 | |
| 488 | switch (s.fTileModeY) { |
| 489 | case SkShader::kClamp_TileMode: |
| 490 | iY2 = SkClampMax(SkScalarFloorToInt(pt.fY), stopY-1); |
| 491 | break; |
| 492 | case SkShader::kRepeat_TileMode: |
| 493 | iY2 = sk_int_mod(SkScalarFloorToInt(pt.fY), stopY); |
| 494 | break; |
| 495 | case SkShader::kMirror_TileMode: |
| 496 | default: |
| 497 | iY2 = sk_int_mirror(SkScalarFloorToInt(pt.fY), stopY); |
| 498 | break; |
| 499 | } |
| 500 | |
| 501 | SkASSERT(iY0 == iY2); |
| 502 | } |
| 503 | #endif |
| 504 | } |
| 505 | |
| 506 | const SkPMColor* row0 = s.fBitmap->getAddr32(0, iY0); |
| 507 | SkPMColor color; |
| 508 | |
| 509 | if (s.fDoFilter) { |
| 510 | const SkPMColor* row1 = s.fBitmap->getAddr32(0, iY1); |
| 511 | |
| 512 | if (s.fAlphaScale < 256) { |
| 513 | Filter_32_alpha(iSubY, *row0, *row1, &color, s.fAlphaScale); |
| 514 | } else { |
| 515 | Filter_32_opaque(iSubY, *row0, *row1, &color); |
| 516 | } |
| 517 | } else { |
| 518 | if (s.fAlphaScale < 256) { |
| 519 | color = SkAlphaMulQ(*row0, s.fAlphaScale); |
| 520 | } else { |
| 521 | color = *row0; |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | sk_memset32(colors, color, count); |
| 526 | } |
| 527 | |
reed@google.com | 6bb92bc | 2012-11-20 19:45:16 +0000 | [diff] [blame] | 528 | static void DoNothing_shaderproc(const SkBitmapProcState&, int x, int y, |
| 529 | SkPMColor* SK_RESTRICT colors, int count) { |
| 530 | // if we get called, the matrix is too tricky, so we just draw nothing |
| 531 | sk_memset32(colors, 0, count); |
| 532 | } |
| 533 | |
| 534 | bool SkBitmapProcState::setupForTranslate() { |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 535 | SkPoint pt; |
| 536 | fInvProc(*fInvMatrix, SK_ScalarHalf, SK_ScalarHalf, &pt); |
reed@google.com | 6bb92bc | 2012-11-20 19:45:16 +0000 | [diff] [blame] | 537 | |
| 538 | /* |
| 539 | * if the translate is larger than our ints, we can get random results, or |
| 540 | * worse, we might get 0x80000000, which wreaks havoc on us, since we can't |
| 541 | * negate it. |
| 542 | */ |
| 543 | const SkScalar too_big = SkIntToScalar(1 << 30); |
| 544 | if (SkScalarAbs(pt.fX) > too_big || SkScalarAbs(pt.fY) > too_big) { |
| 545 | return false; |
| 546 | } |
| 547 | |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 548 | // Since we know we're not filtered, we re-purpose these fields allow |
| 549 | // us to go from device -> src coordinates w/ just an integer add, |
| 550 | // rather than running through the inverse-matrix |
| 551 | fFilterOneX = SkScalarFloorToInt(pt.fX); |
| 552 | fFilterOneY = SkScalarFloorToInt(pt.fY); |
reed@google.com | 6bb92bc | 2012-11-20 19:45:16 +0000 | [diff] [blame] | 553 | return true; |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 554 | } |
| 555 | |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 556 | SkBitmapProcState::ShaderProc32 SkBitmapProcState::chooseShaderProc32() { |
robertphillips@google.com | 8b8bf4d | 2013-01-18 16:38:40 +0000 | [diff] [blame^] | 557 | |
| 558 | if (SkBitmap::kARGB_8888_Config != fBitmap->config()) { |
| 559 | return NULL; |
| 560 | } |
| 561 | |
| 562 | static const unsigned kMask = SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask; |
| 563 | |
| 564 | if (1 == fBitmap->width() && 0 == (fInvType & ~kMask)) { |
| 565 | if (!fDoFilter && fInvType <= SkMatrix::kTranslate_Mask && !this->setupForTranslate()) { |
| 566 | return DoNothing_shaderproc; |
| 567 | } |
| 568 | return S32_D32_constX_shaderproc; |
| 569 | } |
| 570 | |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 571 | if (fAlphaScale < 256) { |
| 572 | return NULL; |
| 573 | } |
| 574 | if (fInvType > SkMatrix::kTranslate_Mask) { |
| 575 | return NULL; |
| 576 | } |
| 577 | if (fDoFilter) { |
| 578 | return NULL; |
| 579 | } |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 580 | |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 581 | SkShader::TileMode tx = (SkShader::TileMode)fTileModeX; |
| 582 | SkShader::TileMode ty = (SkShader::TileMode)fTileModeY; |
| 583 | |
| 584 | if (SkShader::kClamp_TileMode == tx && SkShader::kClamp_TileMode == ty) { |
reed@google.com | 6bb92bc | 2012-11-20 19:45:16 +0000 | [diff] [blame] | 585 | if (this->setupForTranslate()) { |
| 586 | return Clamp_S32_D32_nofilter_trans_shaderproc; |
| 587 | } |
| 588 | return DoNothing_shaderproc; |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 589 | } |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 590 | if (SkShader::kRepeat_TileMode == tx && SkShader::kRepeat_TileMode == ty) { |
reed@google.com | 6bb92bc | 2012-11-20 19:45:16 +0000 | [diff] [blame] | 591 | if (this->setupForTranslate()) { |
| 592 | return Repeat_S32_D32_nofilter_trans_shaderproc; |
| 593 | } |
| 594 | return DoNothing_shaderproc; |
reed@google.com | a8d9930 | 2012-10-16 20:23:25 +0000 | [diff] [blame] | 595 | } |
reed@google.com | 9a4c746 | 2012-10-12 18:21:37 +0000 | [diff] [blame] | 596 | return NULL; |
| 597 | } |
| 598 | |
reed@android.com | 4c128c4 | 2009-08-14 13:54:37 +0000 | [diff] [blame] | 599 | /////////////////////////////////////////////////////////////////////////////// |
reed@google.com | 9fe287b | 2012-03-27 15:54:28 +0000 | [diff] [blame] | 600 | |
| 601 | #ifdef SK_DEBUG |
| 602 | |
| 603 | static void check_scale_nofilter(uint32_t bitmapXY[], int count, |
| 604 | unsigned mx, unsigned my) { |
| 605 | unsigned y = *bitmapXY++; |
| 606 | SkASSERT(y < my); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 607 | |
reed@google.com | 9fe287b | 2012-03-27 15:54:28 +0000 | [diff] [blame] | 608 | const uint16_t* xptr = reinterpret_cast<const uint16_t*>(bitmapXY); |
| 609 | for (int i = 0; i < count; ++i) { |
| 610 | SkASSERT(xptr[i] < mx); |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | static void check_scale_filter(uint32_t bitmapXY[], int count, |
| 615 | unsigned mx, unsigned my) { |
| 616 | uint32_t YY = *bitmapXY++; |
| 617 | unsigned y0 = YY >> 18; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 618 | unsigned y1 = YY & 0x3FFF; |
reed@google.com | 9fe287b | 2012-03-27 15:54:28 +0000 | [diff] [blame] | 619 | SkASSERT(y0 < my); |
| 620 | SkASSERT(y1 < my); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 621 | |
reed@google.com | 9fe287b | 2012-03-27 15:54:28 +0000 | [diff] [blame] | 622 | for (int i = 0; i < count; ++i) { |
| 623 | uint32_t XX = bitmapXY[i]; |
| 624 | unsigned x0 = XX >> 18; |
| 625 | unsigned x1 = XX & 0x3FFF; |
| 626 | SkASSERT(x0 < mx); |
| 627 | SkASSERT(x1 < mx); |
| 628 | } |
| 629 | } |
| 630 | |
| 631 | static void check_affine_nofilter(uint32_t bitmapXY[], int count, |
| 632 | unsigned mx, unsigned my) { |
| 633 | for (int i = 0; i < count; ++i) { |
| 634 | uint32_t XY = bitmapXY[i]; |
| 635 | unsigned x = XY & 0xFFFF; |
| 636 | unsigned y = XY >> 16; |
| 637 | SkASSERT(x < mx); |
| 638 | SkASSERT(y < my); |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | static void check_affine_filter(uint32_t bitmapXY[], int count, |
| 643 | unsigned mx, unsigned my) { |
| 644 | for (int i = 0; i < count; ++i) { |
| 645 | uint32_t YY = *bitmapXY++; |
| 646 | unsigned y0 = YY >> 18; |
| 647 | unsigned y1 = YY & 0x3FFF; |
| 648 | SkASSERT(y0 < my); |
| 649 | SkASSERT(y1 < my); |
| 650 | |
| 651 | uint32_t XX = *bitmapXY++; |
| 652 | unsigned x0 = XX >> 18; |
| 653 | unsigned x1 = XX & 0x3FFF; |
| 654 | SkASSERT(x0 < mx); |
| 655 | SkASSERT(x1 < mx); |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | void SkBitmapProcState::DebugMatrixProc(const SkBitmapProcState& state, |
| 660 | uint32_t bitmapXY[], int count, |
| 661 | int x, int y) { |
| 662 | SkASSERT(bitmapXY); |
| 663 | SkASSERT(count > 0); |
| 664 | |
| 665 | state.fMatrixProc(state, bitmapXY, count, x, y); |
| 666 | |
| 667 | void (*proc)(uint32_t bitmapXY[], int count, unsigned mx, unsigned my); |
| 668 | |
| 669 | // There are four formats possible: |
| 670 | // scale -vs- affine |
| 671 | // filter -vs- nofilter |
| 672 | if (state.fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) { |
| 673 | proc = state.fDoFilter ? check_scale_filter : check_scale_nofilter; |
| 674 | } else { |
| 675 | proc = state.fDoFilter ? check_affine_filter : check_affine_nofilter; |
| 676 | } |
| 677 | proc(bitmapXY, count, state.fBitmap->width(), state.fBitmap->height()); |
| 678 | } |
| 679 | |
| 680 | SkBitmapProcState::MatrixProc SkBitmapProcState::getMatrixProc() const { |
| 681 | return DebugMatrixProc; |
| 682 | } |
| 683 | |
| 684 | #endif |
| 685 | |
| 686 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 4c128c4 | 2009-08-14 13:54:37 +0000 | [diff] [blame] | 687 | /* |
| 688 | The storage requirements for the different matrix procs are as follows, |
| 689 | where each X or Y is 2 bytes, and N is the number of pixels/elements: |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 690 | |
reed@android.com | 4c128c4 | 2009-08-14 13:54:37 +0000 | [diff] [blame] | 691 | scale/translate nofilter Y(4bytes) + N * X |
| 692 | affine/perspective nofilter N * (X Y) |
| 693 | scale/translate filter Y Y + N * (X X) |
| 694 | affine/perspective filter N * (Y Y X X) |
| 695 | */ |
| 696 | int SkBitmapProcState::maxCountForBufferSize(size_t bufferSize) const { |
| 697 | int32_t size = static_cast<int32_t>(bufferSize); |
reed@android.com | 4c128c4 | 2009-08-14 13:54:37 +0000 | [diff] [blame] | 698 | |
| 699 | size &= ~3; // only care about 4-byte aligned chunks |
| 700 | if (fInvType <= (SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask)) { |
| 701 | size -= 4; // the shared Y (or YY) coordinate |
| 702 | if (size < 0) { |
| 703 | size = 0; |
| 704 | } |
reed@android.com | 258cb22 | 2010-04-14 13:36:33 +0000 | [diff] [blame] | 705 | size >>= 1; |
reed@android.com | 4c128c4 | 2009-08-14 13:54:37 +0000 | [diff] [blame] | 706 | } else { |
reed@android.com | 258cb22 | 2010-04-14 13:36:33 +0000 | [diff] [blame] | 707 | size >>= 2; |
reed@android.com | 4c128c4 | 2009-08-14 13:54:37 +0000 | [diff] [blame] | 708 | } |
| 709 | |
reed@android.com | 258cb22 | 2010-04-14 13:36:33 +0000 | [diff] [blame] | 710 | if (fDoFilter) { |
| 711 | size >>= 1; |
| 712 | } |
| 713 | |
| 714 | return size; |
reed@android.com | 4c128c4 | 2009-08-14 13:54:37 +0000 | [diff] [blame] | 715 | } |
| 716 | |