rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkLinearGradient.h" |
| 9 | |
| 10 | static inline int repeat_bits(int x, const int bits) { |
| 11 | return x & ((1 << bits) - 1); |
| 12 | } |
| 13 | |
| 14 | static inline int repeat_8bits(int x) { |
| 15 | return x & 0xFF; |
| 16 | } |
| 17 | |
| 18 | // Visual Studio 2010 (MSC_VER=1600) optimizes bit-shift code incorrectly. |
| 19 | // See http://code.google.com/p/skia/issues/detail?id=472 |
| 20 | #if defined(_MSC_VER) && (_MSC_VER >= 1600) |
| 21 | #pragma optimize("", off) |
| 22 | #endif |
| 23 | |
| 24 | static inline int mirror_bits(int x, const int bits) { |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 25 | if (x & (1 << bits)) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 26 | x = ~x; |
commit-bot@chromium.org | 38bad32 | 2013-07-30 13:16:29 +0000 | [diff] [blame] | 27 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 28 | return x & ((1 << bits) - 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 29 | } |
| 30 | |
| 31 | static inline int mirror_8bits(int x) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 32 | if (x & 256) { |
| 33 | x = ~x; |
| 34 | } |
| 35 | return x & 255; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | #if defined(_MSC_VER) && (_MSC_VER >= 1600) |
| 39 | #pragma optimize("", on) |
| 40 | #endif |
| 41 | |
| 42 | static void pts_to_unit_matrix(const SkPoint pts[2], SkMatrix* matrix) { |
| 43 | SkVector vec = pts[1] - pts[0]; |
| 44 | SkScalar mag = vec.length(); |
| 45 | SkScalar inv = mag ? SkScalarInvert(mag) : 0; |
| 46 | |
| 47 | vec.scale(inv); |
| 48 | matrix->setSinCos(-vec.fY, vec.fX, pts[0].fX, pts[0].fY); |
| 49 | matrix->postTranslate(-pts[0].fX, -pts[0].fY); |
| 50 | matrix->postScale(inv, inv); |
| 51 | } |
| 52 | |
| 53 | /////////////////////////////////////////////////////////////////////////////// |
| 54 | |
commit-bot@chromium.org | 9c9005a | 2014-04-28 14:55:39 +0000 | [diff] [blame] | 55 | SkLinearGradient::SkLinearGradient(const SkPoint pts[2], const Descriptor& desc, |
| 56 | const SkMatrix* localMatrix) |
| 57 | : SkGradientShaderBase(desc, localMatrix) |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 58 | , fStart(pts[0]) |
| 59 | , fEnd(pts[1]) { |
| 60 | pts_to_unit_matrix(pts, &fPtsToUnit); |
| 61 | } |
| 62 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 63 | SkLinearGradient::SkLinearGradient(SkReadBuffer& buffer) |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 64 | : INHERITED(buffer) |
| 65 | , fStart(buffer.readPoint()) |
| 66 | , fEnd(buffer.readPoint()) { |
| 67 | } |
| 68 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 69 | void SkLinearGradient::flatten(SkWriteBuffer& buffer) const { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 70 | this->INHERITED::flatten(buffer); |
| 71 | buffer.writePoint(fStart); |
| 72 | buffer.writePoint(fEnd); |
| 73 | } |
| 74 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 75 | size_t SkLinearGradient::contextSize() const { |
| 76 | return sizeof(LinearGradientContext); |
| 77 | } |
| 78 | |
commit-bot@chromium.org | ce56d96 | 2014-05-05 18:39:18 +0000 | [diff] [blame] | 79 | SkShader::Context* SkLinearGradient::onCreateContext(const ContextRec& rec, void* storage) const { |
commit-bot@chromium.org | e901b6d | 2014-05-01 19:31:31 +0000 | [diff] [blame] | 80 | return SkNEW_PLACEMENT_ARGS(storage, LinearGradientContext, (*this, rec)); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | SkLinearGradient::LinearGradientContext::LinearGradientContext( |
commit-bot@chromium.org | e901b6d | 2014-05-01 19:31:31 +0000 | [diff] [blame] | 84 | const SkLinearGradient& shader, const ContextRec& rec) |
| 85 | : INHERITED(shader, rec) |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 86 | { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 87 | unsigned mask = SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask; |
| 88 | if ((fDstToIndex.getType() & ~mask) == 0) { |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 89 | // when we dither, we are (usually) not const-in-Y |
commit-bot@chromium.org | e901b6d | 2014-05-01 19:31:31 +0000 | [diff] [blame] | 90 | if ((fFlags & SkShader::kHasSpan16_Flag) && !rec.fPaint->isDither()) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 91 | // only claim this if we do have a 16bit mode (i.e. none of our |
| 92 | // colors have alpha), and if we are not dithering (which obviously |
| 93 | // is not const in Y). |
| 94 | fFlags |= SkShader::kConstInY16_Flag; |
| 95 | } |
| 96 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | #define NO_CHECK_ITER \ |
| 100 | do { \ |
| 101 | unsigned fi = fx >> SkGradientShaderBase::kCache32Shift; \ |
| 102 | SkASSERT(fi <= 0xFF); \ |
| 103 | fx += dx; \ |
| 104 | *dstC++ = cache[toggle + fi]; \ |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 105 | toggle = next_dither_toggle(toggle); \ |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 106 | } while (0) |
| 107 | |
| 108 | namespace { |
| 109 | |
| 110 | typedef void (*LinearShadeProc)(TileProc proc, SkFixed dx, SkFixed fx, |
| 111 | SkPMColor* dstC, const SkPMColor* cache, |
| 112 | int toggle, int count); |
| 113 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 114 | // Linear interpolation (lerp) is unnecessary if there are no sharp |
| 115 | // discontinuities in the gradient - which must be true if there are |
| 116 | // only 2 colors - but it's cheap. |
| 117 | void shadeSpan_linear_vertical_lerp(TileProc proc, SkFixed dx, SkFixed fx, |
| 118 | SkPMColor* SK_RESTRICT dstC, |
| 119 | const SkPMColor* SK_RESTRICT cache, |
| 120 | int toggle, int count) { |
| 121 | // We're a vertical gradient, so no change in a span. |
| 122 | // If colors change sharply across the gradient, dithering is |
| 123 | // insufficient (it subsamples the color space) and we need to lerp. |
| 124 | unsigned fullIndex = proc(fx); |
reed@google.com | 3c2102c | 2013-02-01 12:59:40 +0000 | [diff] [blame] | 125 | unsigned fi = fullIndex >> SkGradientShaderBase::kCache32Shift; |
| 126 | unsigned remainder = fullIndex & ((1 << SkGradientShaderBase::kCache32Shift) - 1); |
skia.committer@gmail.com | 9dde018 | 2013-02-04 12:57:42 +0000 | [diff] [blame] | 127 | |
reed@google.com | 3c2102c | 2013-02-01 12:59:40 +0000 | [diff] [blame] | 128 | int index0 = fi + toggle; |
| 129 | int index1 = index0; |
| 130 | if (fi < SkGradientShaderBase::kCache32Count - 1) { |
| 131 | index1 += 1; |
| 132 | } |
| 133 | SkPMColor lerp = SkFastFourByteInterp(cache[index1], cache[index0], remainder); |
| 134 | index0 ^= SkGradientShaderBase::kDitherStride32; |
| 135 | index1 ^= SkGradientShaderBase::kDitherStride32; |
| 136 | SkPMColor dlerp = SkFastFourByteInterp(cache[index1], cache[index0], remainder); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 137 | sk_memset32_dither(dstC, lerp, dlerp, count); |
| 138 | } |
| 139 | |
| 140 | void shadeSpan_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, |
| 141 | SkPMColor* SK_RESTRICT dstC, |
| 142 | const SkPMColor* SK_RESTRICT cache, |
| 143 | int toggle, int count) { |
| 144 | SkClampRange range; |
reed@google.com | 3c2102c | 2013-02-01 12:59:40 +0000 | [diff] [blame] | 145 | range.init(fx, dx, count, 0, SkGradientShaderBase::kCache32Count - 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 146 | |
| 147 | if ((count = range.fCount0) > 0) { |
| 148 | sk_memset32_dither(dstC, |
| 149 | cache[toggle + range.fV0], |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 150 | cache[next_dither_toggle(toggle) + range.fV0], |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 151 | count); |
| 152 | dstC += count; |
| 153 | } |
| 154 | if ((count = range.fCount1) > 0) { |
| 155 | int unroll = count >> 3; |
| 156 | fx = range.fFx1; |
| 157 | for (int i = 0; i < unroll; i++) { |
| 158 | NO_CHECK_ITER; NO_CHECK_ITER; |
| 159 | NO_CHECK_ITER; NO_CHECK_ITER; |
| 160 | NO_CHECK_ITER; NO_CHECK_ITER; |
| 161 | NO_CHECK_ITER; NO_CHECK_ITER; |
| 162 | } |
| 163 | if ((count &= 7) > 0) { |
| 164 | do { |
| 165 | NO_CHECK_ITER; |
| 166 | } while (--count != 0); |
| 167 | } |
| 168 | } |
| 169 | if ((count = range.fCount2) > 0) { |
| 170 | sk_memset32_dither(dstC, |
| 171 | cache[toggle + range.fV1], |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 172 | cache[next_dither_toggle(toggle) + range.fV1], |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 173 | count); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | void shadeSpan_linear_mirror(TileProc proc, SkFixed dx, SkFixed fx, |
| 178 | SkPMColor* SK_RESTRICT dstC, |
| 179 | const SkPMColor* SK_RESTRICT cache, |
| 180 | int toggle, int count) { |
| 181 | do { |
| 182 | unsigned fi = mirror_8bits(fx >> 8); |
| 183 | SkASSERT(fi <= 0xFF); |
| 184 | fx += dx; |
| 185 | *dstC++ = cache[toggle + fi]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 186 | toggle = next_dither_toggle(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 187 | } while (--count != 0); |
| 188 | } |
| 189 | |
| 190 | void shadeSpan_linear_repeat(TileProc proc, SkFixed dx, SkFixed fx, |
| 191 | SkPMColor* SK_RESTRICT dstC, |
| 192 | const SkPMColor* SK_RESTRICT cache, |
| 193 | int toggle, int count) { |
| 194 | do { |
| 195 | unsigned fi = repeat_8bits(fx >> 8); |
| 196 | SkASSERT(fi <= 0xFF); |
| 197 | fx += dx; |
| 198 | *dstC++ = cache[toggle + fi]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 199 | toggle = next_dither_toggle(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 200 | } while (--count != 0); |
| 201 | } |
| 202 | |
| 203 | } |
| 204 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 205 | void SkLinearGradient::LinearGradientContext::shadeSpan(int x, int y, SkPMColor* SK_RESTRICT dstC, |
| 206 | int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 207 | SkASSERT(count > 0); |
| 208 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 209 | const SkLinearGradient& linearGradient = static_cast<const SkLinearGradient&>(fShader); |
| 210 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 211 | SkPoint srcPt; |
| 212 | SkMatrix::MapXYProc dstProc = fDstToIndexProc; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 213 | TileProc proc = linearGradient.fTileProc; |
| 214 | const SkPMColor* SK_RESTRICT cache = fCache->getCache32(); |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 215 | int toggle = init_dither_toggle(x, y); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 216 | |
| 217 | if (fDstToIndexClass != kPerspective_MatrixClass) { |
| 218 | dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, |
| 219 | SkIntToScalar(y) + SK_ScalarHalf, &srcPt); |
| 220 | SkFixed dx, fx = SkScalarToFixed(srcPt.fX); |
| 221 | |
| 222 | if (fDstToIndexClass == kFixedStepInX_MatrixClass) { |
| 223 | SkFixed dxStorage[1]; |
| 224 | (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), dxStorage, NULL); |
| 225 | dx = dxStorage[0]; |
| 226 | } else { |
| 227 | SkASSERT(fDstToIndexClass == kLinear_MatrixClass); |
| 228 | dx = SkScalarToFixed(fDstToIndex.getScaleX()); |
| 229 | } |
| 230 | |
| 231 | LinearShadeProc shadeProc = shadeSpan_linear_repeat; |
reed@google.com | 53009ba | 2013-02-07 20:28:49 +0000 | [diff] [blame] | 232 | if (0 == dx) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 233 | shadeProc = shadeSpan_linear_vertical_lerp; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 234 | } else if (SkShader::kClamp_TileMode == linearGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 235 | shadeProc = shadeSpan_linear_clamp; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 236 | } else if (SkShader::kMirror_TileMode == linearGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 237 | shadeProc = shadeSpan_linear_mirror; |
| 238 | } else { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 239 | SkASSERT(SkShader::kRepeat_TileMode == linearGradient.fTileMode); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 240 | } |
| 241 | (*shadeProc)(proc, dx, fx, dstC, cache, toggle, count); |
| 242 | } else { |
| 243 | SkScalar dstX = SkIntToScalar(x); |
| 244 | SkScalar dstY = SkIntToScalar(y); |
| 245 | do { |
| 246 | dstProc(fDstToIndex, dstX, dstY, &srcPt); |
| 247 | unsigned fi = proc(SkScalarToFixed(srcPt.fX)); |
| 248 | SkASSERT(fi <= 0xFFFF); |
| 249 | *dstC++ = cache[toggle + (fi >> kCache32Shift)]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 250 | toggle = next_dither_toggle(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 251 | dstX += SK_Scalar1; |
| 252 | } while (--count != 0); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | SkShader::BitmapType SkLinearGradient::asABitmap(SkBitmap* bitmap, |
| 257 | SkMatrix* matrix, |
| 258 | TileMode xy[]) const { |
| 259 | if (bitmap) { |
rileya@google.com | 1c6d64b | 2012-07-27 15:49:05 +0000 | [diff] [blame] | 260 | this->getGradientTableBitmap(bitmap); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 261 | } |
| 262 | if (matrix) { |
| 263 | matrix->preConcat(fPtsToUnit); |
| 264 | } |
| 265 | if (xy) { |
| 266 | xy[0] = fTileMode; |
| 267 | xy[1] = kClamp_TileMode; |
| 268 | } |
| 269 | return kLinear_BitmapType; |
| 270 | } |
| 271 | |
| 272 | SkShader::GradientType SkLinearGradient::asAGradient(GradientInfo* info) const { |
| 273 | if (info) { |
| 274 | commonAsAGradient(info); |
| 275 | info->fPoint[0] = fStart; |
| 276 | info->fPoint[1] = fEnd; |
| 277 | } |
| 278 | return kLinear_GradientType; |
| 279 | } |
| 280 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 281 | static void dither_memset16(uint16_t dst[], uint16_t value, uint16_t other, |
| 282 | int count) { |
| 283 | if (reinterpret_cast<uintptr_t>(dst) & 2) { |
| 284 | *dst++ = value; |
| 285 | count -= 1; |
| 286 | SkTSwap(value, other); |
| 287 | } |
| 288 | |
| 289 | sk_memset32((uint32_t*)dst, (value << 16) | other, count >> 1); |
| 290 | |
| 291 | if (count & 1) { |
| 292 | dst[count - 1] = value; |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | #define NO_CHECK_ITER_16 \ |
| 297 | do { \ |
| 298 | unsigned fi = fx >> SkGradientShaderBase::kCache16Shift; \ |
| 299 | SkASSERT(fi < SkGradientShaderBase::kCache16Count); \ |
| 300 | fx += dx; \ |
| 301 | *dstC++ = cache[toggle + fi]; \ |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 302 | toggle = next_dither_toggle16(toggle); \ |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 303 | } while (0) |
| 304 | |
| 305 | namespace { |
| 306 | |
| 307 | typedef void (*LinearShade16Proc)(TileProc proc, SkFixed dx, SkFixed fx, |
| 308 | uint16_t* dstC, const uint16_t* cache, |
| 309 | int toggle, int count); |
| 310 | |
| 311 | void shadeSpan16_linear_vertical(TileProc proc, SkFixed dx, SkFixed fx, |
| 312 | uint16_t* SK_RESTRICT dstC, |
| 313 | const uint16_t* SK_RESTRICT cache, |
| 314 | int toggle, int count) { |
| 315 | // we're a vertical gradient, so no change in a span |
| 316 | unsigned fi = proc(fx) >> SkGradientShaderBase::kCache16Shift; |
| 317 | SkASSERT(fi < SkGradientShaderBase::kCache16Count); |
| 318 | dither_memset16(dstC, cache[toggle + fi], |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 319 | cache[next_dither_toggle16(toggle) + fi], count); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | void shadeSpan16_linear_clamp(TileProc proc, SkFixed dx, SkFixed fx, |
| 323 | uint16_t* SK_RESTRICT dstC, |
| 324 | const uint16_t* SK_RESTRICT cache, |
| 325 | int toggle, int count) { |
| 326 | SkClampRange range; |
reed@google.com | 3c2102c | 2013-02-01 12:59:40 +0000 | [diff] [blame] | 327 | range.init(fx, dx, count, 0, SkGradientShaderBase::kCache32Count - 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 328 | |
| 329 | if ((count = range.fCount0) > 0) { |
| 330 | dither_memset16(dstC, |
| 331 | cache[toggle + range.fV0], |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 332 | cache[next_dither_toggle16(toggle) + range.fV0], |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 333 | count); |
| 334 | dstC += count; |
| 335 | } |
| 336 | if ((count = range.fCount1) > 0) { |
| 337 | int unroll = count >> 3; |
| 338 | fx = range.fFx1; |
| 339 | for (int i = 0; i < unroll; i++) { |
| 340 | NO_CHECK_ITER_16; NO_CHECK_ITER_16; |
| 341 | NO_CHECK_ITER_16; NO_CHECK_ITER_16; |
| 342 | NO_CHECK_ITER_16; NO_CHECK_ITER_16; |
| 343 | NO_CHECK_ITER_16; NO_CHECK_ITER_16; |
| 344 | } |
| 345 | if ((count &= 7) > 0) { |
| 346 | do { |
| 347 | NO_CHECK_ITER_16; |
| 348 | } while (--count != 0); |
| 349 | } |
| 350 | } |
| 351 | if ((count = range.fCount2) > 0) { |
| 352 | dither_memset16(dstC, |
| 353 | cache[toggle + range.fV1], |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 354 | cache[next_dither_toggle16(toggle) + range.fV1], |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 355 | count); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | void shadeSpan16_linear_mirror(TileProc proc, SkFixed dx, SkFixed fx, |
| 360 | uint16_t* SK_RESTRICT dstC, |
| 361 | const uint16_t* SK_RESTRICT cache, |
| 362 | int toggle, int count) { |
| 363 | do { |
| 364 | unsigned fi = mirror_bits(fx >> SkGradientShaderBase::kCache16Shift, |
| 365 | SkGradientShaderBase::kCache16Bits); |
| 366 | SkASSERT(fi < SkGradientShaderBase::kCache16Count); |
| 367 | fx += dx; |
| 368 | *dstC++ = cache[toggle + fi]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 369 | toggle = next_dither_toggle16(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 370 | } while (--count != 0); |
| 371 | } |
| 372 | |
| 373 | void shadeSpan16_linear_repeat(TileProc proc, SkFixed dx, SkFixed fx, |
| 374 | uint16_t* SK_RESTRICT dstC, |
| 375 | const uint16_t* SK_RESTRICT cache, |
| 376 | int toggle, int count) { |
| 377 | do { |
| 378 | unsigned fi = repeat_bits(fx >> SkGradientShaderBase::kCache16Shift, |
| 379 | SkGradientShaderBase::kCache16Bits); |
| 380 | SkASSERT(fi < SkGradientShaderBase::kCache16Count); |
| 381 | fx += dx; |
| 382 | *dstC++ = cache[toggle + fi]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 383 | toggle = next_dither_toggle16(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 384 | } while (--count != 0); |
| 385 | } |
| 386 | } |
| 387 | |
reed@google.com | 1915fd0 | 2013-12-19 14:22:03 +0000 | [diff] [blame] | 388 | static bool fixed_nearly_zero(SkFixed x) { |
| 389 | return SkAbs32(x) < (SK_Fixed1 >> 12); |
| 390 | } |
| 391 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 392 | void SkLinearGradient::LinearGradientContext::shadeSpan16(int x, int y, |
| 393 | uint16_t* SK_RESTRICT dstC, int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 394 | SkASSERT(count > 0); |
| 395 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 396 | const SkLinearGradient& linearGradient = static_cast<const SkLinearGradient&>(fShader); |
| 397 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 398 | SkPoint srcPt; |
| 399 | SkMatrix::MapXYProc dstProc = fDstToIndexProc; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 400 | TileProc proc = linearGradient.fTileProc; |
| 401 | const uint16_t* SK_RESTRICT cache = fCache->getCache16(); |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 402 | int toggle = init_dither_toggle16(x, y); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 403 | |
| 404 | if (fDstToIndexClass != kPerspective_MatrixClass) { |
| 405 | dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, |
| 406 | SkIntToScalar(y) + SK_ScalarHalf, &srcPt); |
| 407 | SkFixed dx, fx = SkScalarToFixed(srcPt.fX); |
| 408 | |
| 409 | if (fDstToIndexClass == kFixedStepInX_MatrixClass) { |
| 410 | SkFixed dxStorage[1]; |
| 411 | (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), dxStorage, NULL); |
| 412 | dx = dxStorage[0]; |
| 413 | } else { |
| 414 | SkASSERT(fDstToIndexClass == kLinear_MatrixClass); |
| 415 | dx = SkScalarToFixed(fDstToIndex.getScaleX()); |
| 416 | } |
| 417 | |
| 418 | LinearShade16Proc shadeProc = shadeSpan16_linear_repeat; |
reed@google.com | 1915fd0 | 2013-12-19 14:22:03 +0000 | [diff] [blame] | 419 | if (fixed_nearly_zero(dx)) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 420 | shadeProc = shadeSpan16_linear_vertical; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 421 | } else if (SkShader::kClamp_TileMode == linearGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 422 | shadeProc = shadeSpan16_linear_clamp; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 423 | } else if (SkShader::kMirror_TileMode == linearGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 424 | shadeProc = shadeSpan16_linear_mirror; |
| 425 | } else { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 426 | SkASSERT(SkShader::kRepeat_TileMode == linearGradient.fTileMode); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 427 | } |
| 428 | (*shadeProc)(proc, dx, fx, dstC, cache, toggle, count); |
| 429 | } else { |
| 430 | SkScalar dstX = SkIntToScalar(x); |
| 431 | SkScalar dstY = SkIntToScalar(y); |
| 432 | do { |
| 433 | dstProc(fDstToIndex, dstX, dstY, &srcPt); |
| 434 | unsigned fi = proc(SkScalarToFixed(srcPt.fX)); |
| 435 | SkASSERT(fi <= 0xFFFF); |
| 436 | |
| 437 | int index = fi >> kCache16Shift; |
| 438 | *dstC++ = cache[toggle + index]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 439 | toggle = next_dither_toggle16(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 440 | |
| 441 | dstX += SK_Scalar1; |
| 442 | } while (--count != 0); |
| 443 | } |
| 444 | } |
| 445 | |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 446 | #if SK_SUPPORT_GPU |
| 447 | |
bsalomon@google.com | 2eaaefd | 2012-10-29 19:51:22 +0000 | [diff] [blame] | 448 | #include "GrTBackendEffectFactory.h" |
bsalomon | 848faf0 | 2014-07-11 10:01:02 -0700 | [diff] [blame] | 449 | #include "gl/GrGLShaderBuilder.h" |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 450 | #include "SkGr.h" |
bsalomon@google.com | 2eaaefd | 2012-10-29 19:51:22 +0000 | [diff] [blame] | 451 | |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 452 | ///////////////////////////////////////////////////////////////////// |
| 453 | |
bsalomon@google.com | 0707c29 | 2012-10-25 21:45:42 +0000 | [diff] [blame] | 454 | class GrGLLinearGradient : public GrGLGradientEffect { |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 455 | public: |
| 456 | |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 457 | GrGLLinearGradient(const GrBackendEffectFactory& factory, const GrDrawEffect&) |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 458 | : INHERITED (factory) { } |
| 459 | |
| 460 | virtual ~GrGLLinearGradient() { } |
| 461 | |
bsalomon@google.com | f78df33 | 2012-10-29 12:43:38 +0000 | [diff] [blame] | 462 | virtual void emitCode(GrGLShaderBuilder*, |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 463 | const GrDrawEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame^] | 464 | const GrEffectKey&, |
bsalomon@google.com | f78df33 | 2012-10-29 12:43:38 +0000 | [diff] [blame] | 465 | const char* outputColor, |
| 466 | const char* inputColor, |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 467 | const TransformedCoordsArray&, |
bsalomon@google.com | f78df33 | 2012-10-29 12:43:38 +0000 | [diff] [blame] | 468 | const TextureSamplerArray&) SK_OVERRIDE; |
| 469 | |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame^] | 470 | static void GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&, GrEffectKeyBuilder* b) { |
| 471 | b->add32(GenBaseGradientKey(drawEffect)); |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 472 | } |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 473 | |
| 474 | private: |
| 475 | |
bsalomon@google.com | 0707c29 | 2012-10-25 21:45:42 +0000 | [diff] [blame] | 476 | typedef GrGLGradientEffect INHERITED; |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 477 | }; |
| 478 | |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 479 | ///////////////////////////////////////////////////////////////////// |
| 480 | |
| 481 | class GrLinearGradient : public GrGradientEffect { |
| 482 | public: |
| 483 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 484 | static GrEffect* Create(GrContext* ctx, |
| 485 | const SkLinearGradient& shader, |
| 486 | const SkMatrix& matrix, |
| 487 | SkShader::TileMode tm) { |
bsalomon | 55fad7a | 2014-07-08 07:34:20 -0700 | [diff] [blame] | 488 | return SkNEW_ARGS(GrLinearGradient, (ctx, shader, matrix, tm)); |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 489 | } |
| 490 | |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 491 | virtual ~GrLinearGradient() { } |
| 492 | |
| 493 | static const char* Name() { return "Linear Gradient"; } |
bsalomon@google.com | 396e61f | 2012-10-25 19:00:29 +0000 | [diff] [blame] | 494 | const GrBackendEffectFactory& getFactory() const SK_OVERRIDE { |
| 495 | return GrTBackendEffectFactory<GrLinearGradient>::getInstance(); |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 496 | } |
| 497 | |
bsalomon@google.com | 422e81a | 2012-10-25 14:11:03 +0000 | [diff] [blame] | 498 | typedef GrGLLinearGradient GLEffect; |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 499 | |
| 500 | private: |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 501 | GrLinearGradient(GrContext* ctx, |
| 502 | const SkLinearGradient& shader, |
| 503 | const SkMatrix& matrix, |
| 504 | SkShader::TileMode tm) |
| 505 | : INHERITED(ctx, shader, matrix, tm) { } |
bsalomon@google.com | f271cc7 | 2012-10-24 19:35:13 +0000 | [diff] [blame] | 506 | GR_DECLARE_EFFECT_TEST; |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 507 | |
| 508 | typedef GrGradientEffect INHERITED; |
| 509 | }; |
| 510 | |
| 511 | ///////////////////////////////////////////////////////////////////// |
| 512 | |
bsalomon@google.com | f271cc7 | 2012-10-24 19:35:13 +0000 | [diff] [blame] | 513 | GR_DEFINE_EFFECT_TEST(GrLinearGradient); |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 514 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 515 | GrEffect* GrLinearGradient::TestCreate(SkRandom* random, |
| 516 | GrContext* context, |
| 517 | const GrDrawTargetCaps&, |
| 518 | GrTexture**) { |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 519 | SkPoint points[] = {{random->nextUScalar1(), random->nextUScalar1()}, |
| 520 | {random->nextUScalar1(), random->nextUScalar1()}}; |
| 521 | |
| 522 | SkColor colors[kMaxRandomGradientColors]; |
| 523 | SkScalar stopsArray[kMaxRandomGradientColors]; |
| 524 | SkScalar* stops = stopsArray; |
| 525 | SkShader::TileMode tm; |
| 526 | int colorCount = RandomGradientParams(random, colors, &stops, &tm); |
| 527 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateLinear(points, |
| 528 | colors, stops, colorCount, |
| 529 | tm)); |
bsalomon@google.com | e197cbf | 2013-01-14 16:46:26 +0000 | [diff] [blame] | 530 | SkPaint paint; |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 531 | GrColor paintColor; |
| 532 | GrEffect* effect; |
| 533 | SkAssertResult(shader->asNewEffect(context, paint, NULL, &paintColor, &effect)); |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 534 | return effect; |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 535 | } |
| 536 | |
| 537 | ///////////////////////////////////////////////////////////////////// |
| 538 | |
bsalomon@google.com | f78df33 | 2012-10-29 12:43:38 +0000 | [diff] [blame] | 539 | void GrGLLinearGradient::emitCode(GrGLShaderBuilder* builder, |
bsalomon@google.com | c781888 | 2013-03-20 19:19:53 +0000 | [diff] [blame] | 540 | const GrDrawEffect&, |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame^] | 541 | const GrEffectKey& key, |
bsalomon@google.com | f78df33 | 2012-10-29 12:43:38 +0000 | [diff] [blame] | 542 | const char* outputColor, |
| 543 | const char* inputColor, |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 544 | const TransformedCoordsArray& coords, |
bsalomon@google.com | f78df33 | 2012-10-29 12:43:38 +0000 | [diff] [blame] | 545 | const TextureSamplerArray& samplers) { |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame^] | 546 | uint32_t baseKey = key.get32(0); |
| 547 | this->emitUniforms(builder, baseKey); |
bsalomon@google.com | 77af680 | 2013-10-02 13:04:56 +0000 | [diff] [blame] | 548 | SkString t = builder->ensureFSCoords2D(coords, 0); |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 549 | t.append(".x"); |
bsalomon | 63e99f7 | 2014-07-21 08:03:14 -0700 | [diff] [blame^] | 550 | this->emitColor(builder, t.c_str(), baseKey, outputColor, inputColor, samplers); |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | ///////////////////////////////////////////////////////////////////// |
| 554 | |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 555 | bool SkLinearGradient::asNewEffect(GrContext* context, const SkPaint& paint, |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 556 | const SkMatrix* localMatrix, GrColor* paintColor, |
| 557 | GrEffect** effect) const { |
bsalomon@google.com | 00835cc | 2013-01-14 17:07:22 +0000 | [diff] [blame] | 558 | SkASSERT(NULL != context); |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 559 | |
bsalomon@google.com | dfdb7e5 | 2012-10-16 15:19:45 +0000 | [diff] [blame] | 560 | SkMatrix matrix; |
bsalomon@google.com | f94b3a4 | 2012-10-31 18:09:01 +0000 | [diff] [blame] | 561 | if (!this->getLocalMatrix().invert(&matrix)) { |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 562 | return false; |
bsalomon@google.com | dfdb7e5 | 2012-10-16 15:19:45 +0000 | [diff] [blame] | 563 | } |
commit-bot@chromium.org | 96fb748 | 2014-05-09 20:28:11 +0000 | [diff] [blame] | 564 | if (localMatrix) { |
| 565 | SkMatrix inv; |
| 566 | if (!localMatrix->invert(&inv)) { |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 567 | return false; |
commit-bot@chromium.org | 96fb748 | 2014-05-09 20:28:11 +0000 | [diff] [blame] | 568 | } |
| 569 | matrix.postConcat(inv); |
| 570 | } |
bsalomon@google.com | f94b3a4 | 2012-10-31 18:09:01 +0000 | [diff] [blame] | 571 | matrix.postConcat(fPtsToUnit); |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 572 | |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 573 | *paintColor = SkColor2GrColorJustAlpha(paint.getColor()); |
| 574 | *effect = GrLinearGradient::Create(context, *this, matrix, fTileMode); |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 575 | |
| 576 | return true; |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 577 | } |
| 578 | |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 579 | #else |
| 580 | |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 581 | bool SkLinearGradient::asNewEffect(GrContext* context, const SkPaint& paint, |
bsalomon | 83d081a | 2014-07-08 09:56:10 -0700 | [diff] [blame] | 582 | const SkMatrix* localMatrix, GrColor* paintColor, |
| 583 | GrEffect** effect) const { |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 584 | SkDEBUGFAIL("Should not call in GPU-less build"); |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 585 | return false; |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | #endif |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 589 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 590 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 591 | void SkLinearGradient::toString(SkString* str) const { |
| 592 | str->append("SkLinearGradient ("); |
| 593 | |
| 594 | str->appendf("start: (%f, %f)", fStart.fX, fStart.fY); |
| 595 | str->appendf(" end: (%f, %f) ", fEnd.fX, fEnd.fY); |
| 596 | |
| 597 | this->INHERITED::toString(str); |
| 598 | |
| 599 | str->append(")"); |
| 600 | } |
| 601 | #endif |