rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2012 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 | */ |
| 8 | |
| 9 | #include "SkRadialGradient.h" |
| 10 | #include "SkRadialGradient_Table.h" |
mtklein | 1113da7 | 2015-04-27 12:08:01 -0700 | [diff] [blame] | 11 | #include "SkNx.h" |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 12 | |
| 13 | #define kSQRT_TABLE_BITS 11 |
| 14 | #define kSQRT_TABLE_SIZE (1 << kSQRT_TABLE_BITS) |
| 15 | |
bungeman | 99fe822 | 2015-08-20 07:57:51 -0700 | [diff] [blame] | 16 | static_assert(sizeof(gSqrt8Table) == kSQRT_TABLE_SIZE, "SqrtTableSizesMatch"); |
mtklein | cc695fe | 2014-12-10 10:29:19 -0800 | [diff] [blame] | 17 | |
reed@google.com | 4ec5c95 | 2013-12-19 15:00:18 +0000 | [diff] [blame] | 18 | #if 0 |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 19 | |
| 20 | #include <stdio.h> |
| 21 | |
| 22 | void SkRadialGradient_BuildTable() { |
| 23 | // build it 0..127 x 0..127, so we use 2^15 - 1 in the numerator for our "fixed" table |
| 24 | |
| 25 | FILE* file = ::fopen("SkRadialGradient_Table.h", "w"); |
| 26 | SkASSERT(file); |
| 27 | ::fprintf(file, "static const uint8_t gSqrt8Table[] = {\n"); |
| 28 | |
| 29 | for (int i = 0; i < kSQRT_TABLE_SIZE; i++) { |
| 30 | if ((i & 15) == 0) { |
| 31 | ::fprintf(file, "\t"); |
| 32 | } |
| 33 | |
| 34 | uint8_t value = SkToU8(SkFixedSqrt(i * SK_Fixed1 / kSQRT_TABLE_SIZE) >> 8); |
| 35 | |
| 36 | ::fprintf(file, "0x%02X", value); |
| 37 | if (i < kSQRT_TABLE_SIZE-1) { |
| 38 | ::fprintf(file, ", "); |
| 39 | } |
| 40 | if ((i & 15) == 15) { |
| 41 | ::fprintf(file, "\n"); |
| 42 | } |
| 43 | } |
| 44 | ::fprintf(file, "};\n"); |
| 45 | ::fclose(file); |
| 46 | } |
| 47 | |
| 48 | #endif |
| 49 | |
| 50 | namespace { |
| 51 | |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 52 | // GCC doesn't like using static functions as template arguments. So force these to be non-static. |
| 53 | inline SkFixed mirror_tileproc_nonstatic(SkFixed x) { |
| 54 | return mirror_tileproc(x); |
| 55 | } |
| 56 | |
| 57 | inline SkFixed repeat_tileproc_nonstatic(SkFixed x) { |
| 58 | return repeat_tileproc(x); |
| 59 | } |
| 60 | |
mtklein | cc695fe | 2014-12-10 10:29:19 -0800 | [diff] [blame] | 61 | SkMatrix rad_to_unit_matrix(const SkPoint& center, SkScalar radius) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 62 | SkScalar inv = SkScalarInvert(radius); |
| 63 | |
mtklein | cc695fe | 2014-12-10 10:29:19 -0800 | [diff] [blame] | 64 | SkMatrix matrix; |
| 65 | matrix.setTranslate(-center.fX, -center.fY); |
| 66 | matrix.postScale(inv, inv); |
| 67 | return matrix; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 68 | } |
| 69 | |
| 70 | typedef void (* RadialShade16Proc)(SkScalar sfx, SkScalar sdx, |
| 71 | SkScalar sfy, SkScalar sdy, |
| 72 | uint16_t* dstC, const uint16_t* cache, |
| 73 | int toggle, int count); |
| 74 | |
| 75 | void shadeSpan16_radial_clamp(SkScalar sfx, SkScalar sdx, |
| 76 | SkScalar sfy, SkScalar sdy, |
| 77 | uint16_t* SK_RESTRICT dstC, const uint16_t* SK_RESTRICT cache, |
| 78 | int toggle, int count) { |
| 79 | const uint8_t* SK_RESTRICT sqrt_table = gSqrt8Table; |
| 80 | |
| 81 | /* knock these down so we can pin against +- 0x7FFF, which is an |
| 82 | immediate load, rather than 0xFFFF which is slower. This is a |
| 83 | compromise, since it reduces our precision, but that appears |
| 84 | to be visually OK. If we decide this is OK for all of our cases, |
| 85 | we could (it seems) put this scale-down into fDstToIndex, |
| 86 | to avoid having to do these extra shifts each time. |
| 87 | */ |
| 88 | SkFixed fx = SkScalarToFixed(sfx) >> 1; |
| 89 | SkFixed dx = SkScalarToFixed(sdx) >> 1; |
| 90 | SkFixed fy = SkScalarToFixed(sfy) >> 1; |
| 91 | SkFixed dy = SkScalarToFixed(sdy) >> 1; |
| 92 | // might perform this check for the other modes, |
| 93 | // but the win will be a smaller % of the total |
| 94 | if (dy == 0) { |
bungeman | 62ce030 | 2015-08-28 09:09:32 -0700 | [diff] [blame] | 95 | fy = SkTPin(fy, -0xFFFF >> 1, 0xFFFF >> 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 96 | fy *= fy; |
| 97 | do { |
bungeman | 62ce030 | 2015-08-28 09:09:32 -0700 | [diff] [blame] | 98 | unsigned xx = SkTPin(fx, -0xFFFF >> 1, 0xFFFF >> 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 99 | unsigned fi = (xx * xx + fy) >> (14 + 16 - kSQRT_TABLE_BITS); |
| 100 | fi = SkFastMin32(fi, 0xFFFF >> (16 - kSQRT_TABLE_BITS)); |
| 101 | fx += dx; |
| 102 | *dstC++ = cache[toggle + |
| 103 | (sqrt_table[fi] >> SkGradientShaderBase::kSqrt16Shift)]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 104 | toggle = next_dither_toggle16(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 105 | } while (--count != 0); |
| 106 | } else { |
| 107 | do { |
bungeman | 62ce030 | 2015-08-28 09:09:32 -0700 | [diff] [blame] | 108 | unsigned xx = SkTPin(fx, -0xFFFF >> 1, 0xFFFF >> 1); |
| 109 | unsigned fi = SkTPin(fy, -0xFFFF >> 1, 0xFFFF >> 1); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 110 | fi = (xx * xx + fi * fi) >> (14 + 16 - kSQRT_TABLE_BITS); |
| 111 | fi = SkFastMin32(fi, 0xFFFF >> (16 - kSQRT_TABLE_BITS)); |
| 112 | fx += dx; |
| 113 | fy += dy; |
| 114 | *dstC++ = cache[toggle + |
| 115 | (sqrt_table[fi] >> SkGradientShaderBase::kSqrt16Shift)]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 116 | toggle = next_dither_toggle16(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 117 | } while (--count != 0); |
| 118 | } |
| 119 | } |
| 120 | |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 121 | template <SkFixed (*TileProc)(SkFixed)> |
| 122 | void shadeSpan16_radial(SkScalar fx, SkScalar dx, SkScalar fy, SkScalar dy, |
| 123 | uint16_t* SK_RESTRICT dstC, const uint16_t* SK_RESTRICT cache, |
| 124 | int toggle, int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 125 | do { |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 126 | const SkFixed dist = SkFloatToFixed(sk_float_sqrt(fx*fx + fy*fy)); |
| 127 | const unsigned fi = TileProc(dist); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 128 | SkASSERT(fi <= 0xFFFF); |
| 129 | *dstC++ = cache[toggle + (fi >> SkGradientShaderBase::kCache16Shift)]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 130 | toggle = next_dither_toggle16(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 131 | fx += dx; |
| 132 | fy += dy; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 133 | } while (--count != 0); |
| 134 | } |
| 135 | |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 136 | void shadeSpan16_radial_mirror(SkScalar fx, SkScalar dx, SkScalar fy, SkScalar dy, |
| 137 | uint16_t* SK_RESTRICT dstC, const uint16_t* SK_RESTRICT cache, |
| 138 | int toggle, int count) { |
| 139 | shadeSpan16_radial<mirror_tileproc_nonstatic>(fx, dx, fy, dy, dstC, cache, toggle, count); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 140 | } |
| 141 | |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 142 | void shadeSpan16_radial_repeat(SkScalar fx, SkScalar dx, SkScalar fy, SkScalar dy, |
| 143 | uint16_t* SK_RESTRICT dstC, const uint16_t* SK_RESTRICT cache, |
| 144 | int toggle, int count) { |
| 145 | shadeSpan16_radial<repeat_tileproc_nonstatic>(fx, dx, fy, dy, dstC, cache, toggle, count); |
| 146 | } |
| 147 | |
| 148 | } // namespace |
| 149 | |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 150 | ///////////////////////////////////////////////////////////////////// |
| 151 | |
reed | addf2ed | 2014-08-11 08:28:24 -0700 | [diff] [blame] | 152 | SkRadialGradient::SkRadialGradient(const SkPoint& center, SkScalar radius, const Descriptor& desc) |
mtklein | cc695fe | 2014-12-10 10:29:19 -0800 | [diff] [blame] | 153 | : SkGradientShaderBase(desc, rad_to_unit_matrix(center, radius)) |
reed | addf2ed | 2014-08-11 08:28:24 -0700 | [diff] [blame] | 154 | , fCenter(center) |
mtklein | cc695fe | 2014-12-10 10:29:19 -0800 | [diff] [blame] | 155 | , fRadius(radius) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 156 | } |
| 157 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 158 | size_t SkRadialGradient::contextSize() const { |
| 159 | return sizeof(RadialGradientContext); |
| 160 | } |
| 161 | |
commit-bot@chromium.org | ce56d96 | 2014-05-05 18:39:18 +0000 | [diff] [blame] | 162 | SkShader::Context* SkRadialGradient::onCreateContext(const ContextRec& rec, void* storage) const { |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 163 | return new (storage) RadialGradientContext(*this, rec); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | SkRadialGradient::RadialGradientContext::RadialGradientContext( |
commit-bot@chromium.org | e901b6d | 2014-05-01 19:31:31 +0000 | [diff] [blame] | 167 | const SkRadialGradient& shader, const ContextRec& rec) |
| 168 | : INHERITED(shader, rec) {} |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 169 | |
| 170 | void SkRadialGradient::RadialGradientContext::shadeSpan16(int x, int y, uint16_t* dstCParam, |
| 171 | int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 172 | SkASSERT(count > 0); |
| 173 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 174 | const SkRadialGradient& radialGradient = static_cast<const SkRadialGradient&>(fShader); |
| 175 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 176 | uint16_t* SK_RESTRICT dstC = dstCParam; |
| 177 | |
| 178 | SkPoint srcPt; |
| 179 | SkMatrix::MapXYProc dstProc = fDstToIndexProc; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 180 | TileProc proc = radialGradient.fTileProc; |
| 181 | const uint16_t* SK_RESTRICT cache = fCache->getCache16(); |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 182 | int toggle = init_dither_toggle16(x, y); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 183 | |
| 184 | if (fDstToIndexClass != kPerspective_MatrixClass) { |
| 185 | dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, |
| 186 | SkIntToScalar(y) + SK_ScalarHalf, &srcPt); |
| 187 | |
| 188 | SkScalar sdx = fDstToIndex.getScaleX(); |
| 189 | SkScalar sdy = fDstToIndex.getSkewY(); |
| 190 | |
| 191 | if (fDstToIndexClass == kFixedStepInX_MatrixClass) { |
| 192 | SkFixed storage[2]; |
| 193 | (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), |
| 194 | &storage[0], &storage[1]); |
| 195 | sdx = SkFixedToScalar(storage[0]); |
| 196 | sdy = SkFixedToScalar(storage[1]); |
| 197 | } else { |
| 198 | SkASSERT(fDstToIndexClass == kLinear_MatrixClass); |
| 199 | } |
| 200 | |
| 201 | RadialShade16Proc shadeProc = shadeSpan16_radial_repeat; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 202 | if (SkShader::kClamp_TileMode == radialGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 203 | shadeProc = shadeSpan16_radial_clamp; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 204 | } else if (SkShader::kMirror_TileMode == radialGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 205 | shadeProc = shadeSpan16_radial_mirror; |
| 206 | } else { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 207 | SkASSERT(SkShader::kRepeat_TileMode == radialGradient.fTileMode); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 208 | } |
| 209 | (*shadeProc)(srcPt.fX, sdx, srcPt.fY, sdy, dstC, |
| 210 | cache, toggle, count); |
| 211 | } else { // perspective case |
| 212 | SkScalar dstX = SkIntToScalar(x); |
| 213 | SkScalar dstY = SkIntToScalar(y); |
| 214 | do { |
| 215 | dstProc(fDstToIndex, dstX, dstY, &srcPt); |
| 216 | unsigned fi = proc(SkScalarToFixed(srcPt.length())); |
| 217 | SkASSERT(fi <= 0xFFFF); |
| 218 | |
| 219 | int index = fi >> (16 - kCache16Bits); |
| 220 | *dstC++ = cache[toggle + index]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 221 | toggle = next_dither_toggle16(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 222 | |
| 223 | dstX += SK_Scalar1; |
| 224 | } while (--count != 0); |
| 225 | } |
| 226 | } |
| 227 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 228 | SkShader::GradientType SkRadialGradient::asAGradient(GradientInfo* info) const { |
| 229 | if (info) { |
| 230 | commonAsAGradient(info); |
| 231 | info->fPoint[0] = fCenter; |
| 232 | info->fRadius[0] = fRadius; |
| 233 | } |
| 234 | return kRadial_GradientType; |
| 235 | } |
| 236 | |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 237 | SkFlattenable* SkRadialGradient::CreateProc(SkReadBuffer& buffer) { |
| 238 | DescriptorScope desc; |
| 239 | if (!desc.unflatten(buffer)) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 240 | return nullptr; |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 241 | } |
| 242 | const SkPoint center = buffer.readPoint(); |
| 243 | const SkScalar radius = buffer.readScalar(); |
| 244 | return SkGradientShader::CreateRadial(center, radius, desc.fColors, desc.fPos, desc.fCount, |
| 245 | desc.fTileMode, desc.fGradFlags, desc.fLocalMatrix); |
| 246 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 247 | |
commit-bot@chromium.org | 8b0e8ac | 2014-01-30 18:58:24 +0000 | [diff] [blame] | 248 | void SkRadialGradient::flatten(SkWriteBuffer& buffer) const { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 249 | this->INHERITED::flatten(buffer); |
| 250 | buffer.writePoint(fCenter); |
| 251 | buffer.writeScalar(fRadius); |
| 252 | } |
| 253 | |
| 254 | namespace { |
| 255 | |
mtklein | 1113da7 | 2015-04-27 12:08:01 -0700 | [diff] [blame] | 256 | inline bool radial_completely_pinned(SkScalar fx, SkScalar dx, SkScalar fy, SkScalar dy) { |
| 257 | // fast, overly-conservative test: checks unit square instead of unit circle |
| 258 | bool xClamped = (fx >= 1 && dx >= 0) || (fx <= -1 && dx <= 0); |
| 259 | bool yClamped = (fy >= 1 && dy >= 0) || (fy <= -1 && dy <= 0); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 260 | return xClamped || yClamped; |
| 261 | } |
| 262 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 263 | typedef void (* RadialShadeProc)(SkScalar sfx, SkScalar sdx, |
| 264 | SkScalar sfy, SkScalar sdy, |
| 265 | SkPMColor* dstC, const SkPMColor* cache, |
| 266 | int count, int toggle); |
| 267 | |
mtklein | 1113da7 | 2015-04-27 12:08:01 -0700 | [diff] [blame] | 268 | static inline Sk4f fast_sqrt(const Sk4f& R) { |
mtklein | d7c014f | 2015-04-27 14:22:32 -0700 | [diff] [blame] | 269 | // R * R.rsqrt0() is much faster, but it's non-monotonic, which isn't so pretty for gradients. |
| 270 | return R * R.rsqrt1(); |
mtklein | 1113da7 | 2015-04-27 12:08:01 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | static inline Sk4f sum_squares(const Sk4f& a, const Sk4f& b) { |
| 274 | return a * a + b * b; |
| 275 | } |
| 276 | |
| 277 | void shadeSpan_radial_clamp2(SkScalar sfx, SkScalar sdx, SkScalar sfy, SkScalar sdy, |
| 278 | SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, |
| 279 | int count, int toggle) { |
| 280 | if (radial_completely_pinned(sfx, sdx, sfy, sdy)) { |
| 281 | unsigned fi = SkGradientShaderBase::kCache32Count - 1; |
| 282 | sk_memset32_dither(dstC, |
| 283 | cache[toggle + fi], |
| 284 | cache[next_dither_toggle(toggle) + fi], |
| 285 | count); |
| 286 | } else { |
| 287 | const Sk4f max(255); |
| 288 | const float scale = 255; |
| 289 | sfx *= scale; |
| 290 | sfy *= scale; |
| 291 | sdx *= scale; |
| 292 | sdy *= scale; |
| 293 | const Sk4f fx4(sfx, sfx + sdx, sfx + 2*sdx, sfx + 3*sdx); |
| 294 | const Sk4f fy4(sfy, sfy + sdy, sfy + 2*sdy, sfy + 3*sdy); |
| 295 | const Sk4f dx4(sdx * 4); |
| 296 | const Sk4f dy4(sdy * 4); |
| 297 | |
| 298 | Sk4f tmpxy = fx4 * dx4 + fy4 * dy4; |
| 299 | Sk4f tmpdxdy = sum_squares(dx4, dy4); |
| 300 | Sk4f R = sum_squares(fx4, fy4); |
| 301 | Sk4f dR = tmpxy + tmpxy + tmpdxdy; |
| 302 | const Sk4f ddR = tmpdxdy + tmpdxdy; |
| 303 | |
| 304 | for (int i = 0; i < (count >> 2); ++i) { |
| 305 | Sk4f dist = Sk4f::Min(fast_sqrt(R), max); |
mtklein | f2fe0e0 | 2015-06-10 08:57:28 -0700 | [diff] [blame] | 306 | R = R + dR; |
| 307 | dR = dR + ddR; |
mtklein | 1113da7 | 2015-04-27 12:08:01 -0700 | [diff] [blame] | 308 | |
| 309 | int fi[4]; |
| 310 | dist.castTrunc().store(fi); |
| 311 | |
| 312 | for (int i = 0; i < 4; i++) { |
| 313 | *dstC++ = cache[toggle + fi[i]]; |
| 314 | toggle = next_dither_toggle(toggle); |
| 315 | } |
| 316 | } |
| 317 | count &= 3; |
| 318 | if (count) { |
| 319 | Sk4f dist = Sk4f::Min(fast_sqrt(R), max); |
| 320 | |
| 321 | int fi[4]; |
| 322 | dist.castTrunc().store(fi); |
| 323 | for (int i = 0; i < count; i++) { |
| 324 | *dstC++ = cache[toggle + fi[i]]; |
| 325 | toggle = next_dither_toggle(toggle); |
| 326 | } |
| 327 | } |
| 328 | } |
| 329 | } |
| 330 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 331 | // Unrolling this loop doesn't seem to help (when float); we're stalling to |
| 332 | // get the results of the sqrt (?), and don't have enough extra registers to |
| 333 | // have many in flight. |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 334 | template <SkFixed (*TileProc)(SkFixed)> |
| 335 | void shadeSpan_radial(SkScalar fx, SkScalar dx, SkScalar fy, SkScalar dy, |
| 336 | SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, |
| 337 | int count, int toggle) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 338 | do { |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 339 | const SkFixed dist = SkFloatToFixed(sk_float_sqrt(fx*fx + fy*fy)); |
| 340 | const unsigned fi = TileProc(dist); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 341 | SkASSERT(fi <= 0xFFFF); |
| 342 | *dstC++ = cache[toggle + (fi >> SkGradientShaderBase::kCache32Shift)]; |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 343 | toggle = next_dither_toggle(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 344 | fx += dx; |
| 345 | fy += dy; |
| 346 | } while (--count != 0); |
| 347 | } |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 348 | |
| 349 | void shadeSpan_radial_mirror(SkScalar fx, SkScalar dx, SkScalar fy, SkScalar dy, |
| 350 | SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, |
| 351 | int count, int toggle) { |
| 352 | shadeSpan_radial<mirror_tileproc_nonstatic>(fx, dx, fy, dy, dstC, cache, count, toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 353 | } |
| 354 | |
commit-bot@chromium.org | 34150b4 | 2013-10-16 18:59:44 +0000 | [diff] [blame] | 355 | void shadeSpan_radial_repeat(SkScalar fx, SkScalar dx, SkScalar fy, SkScalar dy, |
| 356 | SkPMColor* SK_RESTRICT dstC, const SkPMColor* SK_RESTRICT cache, |
| 357 | int count, int toggle) { |
| 358 | shadeSpan_radial<repeat_tileproc_nonstatic>(fx, dx, fy, dy, dstC, cache, count, toggle); |
| 359 | } |
| 360 | |
| 361 | } // namespace |
| 362 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 363 | void SkRadialGradient::RadialGradientContext::shadeSpan(int x, int y, |
| 364 | SkPMColor* SK_RESTRICT dstC, int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 365 | SkASSERT(count > 0); |
| 366 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 367 | const SkRadialGradient& radialGradient = static_cast<const SkRadialGradient&>(fShader); |
| 368 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 369 | SkPoint srcPt; |
| 370 | SkMatrix::MapXYProc dstProc = fDstToIndexProc; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 371 | TileProc proc = radialGradient.fTileProc; |
| 372 | const SkPMColor* SK_RESTRICT cache = fCache->getCache32(); |
reed@google.com | 55853db | 2013-02-01 19:34:59 +0000 | [diff] [blame] | 373 | int toggle = init_dither_toggle(x, y); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 374 | |
| 375 | if (fDstToIndexClass != kPerspective_MatrixClass) { |
| 376 | dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, |
| 377 | SkIntToScalar(y) + SK_ScalarHalf, &srcPt); |
| 378 | SkScalar sdx = fDstToIndex.getScaleX(); |
| 379 | SkScalar sdy = fDstToIndex.getSkewY(); |
| 380 | |
| 381 | if (fDstToIndexClass == kFixedStepInX_MatrixClass) { |
| 382 | SkFixed storage[2]; |
| 383 | (void)fDstToIndex.fixedStepInX(SkIntToScalar(y), |
| 384 | &storage[0], &storage[1]); |
| 385 | sdx = SkFixedToScalar(storage[0]); |
| 386 | sdy = SkFixedToScalar(storage[1]); |
| 387 | } else { |
| 388 | SkASSERT(fDstToIndexClass == kLinear_MatrixClass); |
| 389 | } |
| 390 | |
| 391 | RadialShadeProc shadeProc = shadeSpan_radial_repeat; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 392 | if (SkShader::kClamp_TileMode == radialGradient.fTileMode) { |
reed | 67383fc | 2015-05-05 07:55:19 -0700 | [diff] [blame] | 393 | shadeProc = shadeSpan_radial_clamp2; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 394 | } else if (SkShader::kMirror_TileMode == radialGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 395 | shadeProc = shadeSpan_radial_mirror; |
| 396 | } else { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 397 | SkASSERT(SkShader::kRepeat_TileMode == radialGradient.fTileMode); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 398 | } |
| 399 | (*shadeProc)(srcPt.fX, sdx, srcPt.fY, sdy, dstC, cache, count, toggle); |
| 400 | } else { // perspective case |
| 401 | SkScalar dstX = SkIntToScalar(x); |
| 402 | SkScalar dstY = SkIntToScalar(y); |
| 403 | do { |
| 404 | dstProc(fDstToIndex, dstX, dstY, &srcPt); |
| 405 | unsigned fi = proc(SkScalarToFixed(srcPt.length())); |
| 406 | SkASSERT(fi <= 0xFFFF); |
| 407 | *dstC++ = cache[fi >> SkGradientShaderBase::kCache32Shift]; |
| 408 | dstX += SK_Scalar1; |
| 409 | } while (--count != 0); |
| 410 | } |
| 411 | } |
| 412 | |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 413 | ///////////////////////////////////////////////////////////////////// |
| 414 | |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 415 | #if SK_SUPPORT_GPU |
| 416 | |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 417 | #include "SkGr.h" |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame^] | 418 | #include "effects/GrExtractAlphaFragmentProcessor.h" |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 419 | #include "gl/builders/GrGLProgramBuilder.h" |
bsalomon@google.com | 2eaaefd | 2012-10-29 19:51:22 +0000 | [diff] [blame] | 420 | |
bsalomon@google.com | 0707c29 | 2012-10-25 21:45:42 +0000 | [diff] [blame] | 421 | class GrGLRadialGradient : public GrGLGradientEffect { |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 422 | public: |
| 423 | |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 424 | GrGLRadialGradient(const GrProcessor&) {} |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 425 | virtual ~GrGLRadialGradient() { } |
| 426 | |
wangyix | 7c157a9 | 2015-07-22 15:08:53 -0700 | [diff] [blame] | 427 | virtual void emitCode(EmitArgs&) override; |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 428 | |
jvanverth | cfc1886 | 2015-04-28 08:48:20 -0700 | [diff] [blame] | 429 | static void GenKey(const GrProcessor& processor, const GrGLSLCaps&, GrProcessorKeyBuilder* b) { |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 430 | b->add32(GenBaseGradientKey(processor)); |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 431 | } |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 432 | |
| 433 | private: |
| 434 | |
bsalomon@google.com | 0707c29 | 2012-10-25 21:45:42 +0000 | [diff] [blame] | 435 | typedef GrGLGradientEffect INHERITED; |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 436 | |
| 437 | }; |
| 438 | |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 439 | ///////////////////////////////////////////////////////////////////// |
| 440 | |
| 441 | class GrRadialGradient : public GrGradientEffect { |
| 442 | public: |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 443 | static GrFragmentProcessor* Create(GrContext* ctx, |
joshualitt | 9cc1775 | 2015-07-09 06:28:14 -0700 | [diff] [blame] | 444 | GrProcessorDataManager* procDataManager, |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 445 | const SkRadialGradient& shader, |
| 446 | const SkMatrix& matrix, |
| 447 | SkShader::TileMode tm) { |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 448 | return new GrRadialGradient(ctx, procDataManager, shader, matrix, tm); |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 449 | } |
| 450 | |
| 451 | virtual ~GrRadialGradient() { } |
| 452 | |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 453 | const char* name() const override { return "Radial Gradient"; } |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 454 | |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 455 | private: |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 456 | GrRadialGradient(GrContext* ctx, |
joshualitt | 9cc1775 | 2015-07-09 06:28:14 -0700 | [diff] [blame] | 457 | GrProcessorDataManager* procDataManager, |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 458 | const SkRadialGradient& shader, |
| 459 | const SkMatrix& matrix, |
| 460 | SkShader::TileMode tm) |
joshualitt | 9cc1775 | 2015-07-09 06:28:14 -0700 | [diff] [blame] | 461 | : INHERITED(ctx, procDataManager, shader, matrix, tm) { |
joshualitt | eb2a676 | 2014-12-04 11:35:33 -0800 | [diff] [blame] | 462 | this->initClassID<GrRadialGradient>(); |
bsalomon@google.com | 0ac6af4 | 2013-01-16 15:16:18 +0000 | [diff] [blame] | 463 | } |
| 464 | |
wangyix | b1daa86 | 2015-08-18 11:29:31 -0700 | [diff] [blame] | 465 | GrGLFragmentProcessor* onCreateGLInstance() const override { |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 466 | return new GrGLRadialGradient(*this); |
wangyix | b1daa86 | 2015-08-18 11:29:31 -0700 | [diff] [blame] | 467 | } |
| 468 | |
wangyix | 4b3050b | 2015-08-04 07:59:37 -0700 | [diff] [blame] | 469 | virtual void onGetGLProcessorKey(const GrGLSLCaps& caps, |
| 470 | GrProcessorKeyBuilder* b) const override { |
| 471 | GrGLRadialGradient::GenKey(*this, caps, b); |
| 472 | } |
| 473 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 474 | GR_DECLARE_FRAGMENT_PROCESSOR_TEST; |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 475 | |
| 476 | typedef GrGradientEffect INHERITED; |
| 477 | }; |
| 478 | |
| 479 | ///////////////////////////////////////////////////////////////////// |
| 480 | |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 481 | GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrRadialGradient); |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 482 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame^] | 483 | const GrFragmentProcessor* GrRadialGradient::TestCreate(GrProcessorTestData* d) { |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 484 | SkPoint center = {d->fRandom->nextUScalar1(), d->fRandom->nextUScalar1()}; |
| 485 | SkScalar radius = d->fRandom->nextUScalar1(); |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 486 | |
| 487 | SkColor colors[kMaxRandomGradientColors]; |
| 488 | SkScalar stopsArray[kMaxRandomGradientColors]; |
| 489 | SkScalar* stops = stopsArray; |
| 490 | SkShader::TileMode tm; |
joshualitt | 0067ff5 | 2015-07-08 14:26:19 -0700 | [diff] [blame] | 491 | int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm); |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 492 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateRadial(center, radius, |
| 493 | colors, stops, colorCount, |
| 494 | tm)); |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame^] | 495 | const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext, |
| 496 | GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality, d->fProcDataManager); |
| 497 | GrAlwaysAssert(fp); |
joshualitt | b0a8a37 | 2014-09-23 09:50:21 -0700 | [diff] [blame] | 498 | return fp; |
bsalomon@google.com | d472620 | 2012-08-03 14:34:46 +0000 | [diff] [blame] | 499 | } |
| 500 | |
| 501 | ///////////////////////////////////////////////////////////////////// |
| 502 | |
wangyix | 7c157a9 | 2015-07-22 15:08:53 -0700 | [diff] [blame] | 503 | void GrGLRadialGradient::emitCode(EmitArgs& args) { |
| 504 | const GrRadialGradient& ge = args.fFp.cast<GrRadialGradient>(); |
| 505 | this->emitUniforms(args.fBuilder, ge); |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 506 | SkString t("length("); |
wangyix | 7c157a9 | 2015-07-22 15:08:53 -0700 | [diff] [blame] | 507 | t.append(args.fBuilder->getFragmentShaderBuilder()->ensureFSCoords2D(args.fCoords, 0)); |
bsalomon@google.com | d8b5fac | 2012-11-01 17:02:46 +0000 | [diff] [blame] | 508 | t.append(")"); |
wangyix | 7c157a9 | 2015-07-22 15:08:53 -0700 | [diff] [blame] | 509 | this->emitColor(args.fBuilder, ge, t.c_str(), args.fOutputColor, args.fInputColor, |
| 510 | args.fSamplers); |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 511 | } |
| 512 | |
rileya@google.com | d7cc651 | 2012-07-27 14:00:39 +0000 | [diff] [blame] | 513 | ///////////////////////////////////////////////////////////////////// |
| 514 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame^] | 515 | const GrFragmentProcessor* SkRadialGradient::asFragmentProcessor( |
| 516 | GrContext* context, |
| 517 | const SkMatrix& viewM, |
| 518 | const SkMatrix* localMatrix, |
| 519 | SkFilterQuality, |
| 520 | GrProcessorDataManager* procDataManager) const { |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 521 | SkASSERT(context); |
mtklein | 3f3b3d0 | 2014-12-01 11:47:08 -0800 | [diff] [blame] | 522 | |
bsalomon@google.com | dfdb7e5 | 2012-10-16 15:19:45 +0000 | [diff] [blame] | 523 | SkMatrix matrix; |
bsalomon@google.com | f94b3a4 | 2012-10-31 18:09:01 +0000 | [diff] [blame] | 524 | if (!this->getLocalMatrix().invert(&matrix)) { |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame^] | 525 | return nullptr; |
bsalomon@google.com | dfdb7e5 | 2012-10-16 15:19:45 +0000 | [diff] [blame] | 526 | } |
commit-bot@chromium.org | 96fb748 | 2014-05-09 20:28:11 +0000 | [diff] [blame] | 527 | if (localMatrix) { |
| 528 | SkMatrix inv; |
| 529 | if (!localMatrix->invert(&inv)) { |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame^] | 530 | return nullptr; |
commit-bot@chromium.org | 96fb748 | 2014-05-09 20:28:11 +0000 | [diff] [blame] | 531 | } |
| 532 | matrix.postConcat(inv); |
| 533 | } |
bsalomon@google.com | f94b3a4 | 2012-10-31 18:09:01 +0000 | [diff] [blame] | 534 | matrix.postConcat(fPtsToUnit); |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame^] | 535 | SkAutoTUnref<const GrFragmentProcessor> inner( |
| 536 | GrRadialGradient::Create(context, procDataManager, *this, matrix, fTileMode)); |
| 537 | return GrExtractAlphaFragmentProcessor::Create(inner); |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 538 | } |
| 539 | |
| 540 | #endif |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 541 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 542 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 543 | void SkRadialGradient::toString(SkString* str) const { |
| 544 | str->append("SkRadialGradient: ("); |
skia.committer@gmail.com | ff21c2e | 2013-01-16 07:05:56 +0000 | [diff] [blame] | 545 | |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 546 | str->append("center: ("); |
| 547 | str->appendScalar(fCenter.fX); |
| 548 | str->append(", "); |
| 549 | str->appendScalar(fCenter.fY); |
| 550 | str->append(") radius: "); |
| 551 | str->appendScalar(fRadius); |
| 552 | str->append(" "); |
| 553 | |
| 554 | this->INHERITED::toString(str); |
| 555 | |
| 556 | str->append(")"); |
| 557 | } |
| 558 | #endif |