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 "SkTwoPointConicalGradient.h" |
commit-bot@chromium.org | aa64fbf | 2014-04-03 14:59:19 +0000 | [diff] [blame] | 9 | #include "SkTwoPointConicalGradient_gpu.h" |
| 10 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 11 | struct TwoPtRadialContext { |
| 12 | const TwoPtRadial& fRec; |
| 13 | float fRelX, fRelY; |
| 14 | const float fIncX, fIncY; |
| 15 | float fB; |
| 16 | const float fDB; |
| 17 | |
| 18 | TwoPtRadialContext(const TwoPtRadial& rec, SkScalar fx, SkScalar fy, |
| 19 | SkScalar dfx, SkScalar dfy); |
| 20 | SkFixed nextT(); |
| 21 | }; |
| 22 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 23 | static int valid_divide(float numer, float denom, float* ratio) { |
| 24 | SkASSERT(ratio); |
| 25 | if (0 == denom) { |
| 26 | return 0; |
| 27 | } |
| 28 | *ratio = numer / denom; |
| 29 | return 1; |
| 30 | } |
| 31 | |
| 32 | // Return the number of distinct real roots, and write them into roots[] in |
| 33 | // ascending order |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 34 | static int find_quad_roots(float A, float B, float C, float roots[2], bool descendingOrder = false) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 35 | SkASSERT(roots); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 36 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 37 | if (A == 0) { |
| 38 | return valid_divide(-C, B, roots); |
| 39 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 40 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 41 | float R = B*B - 4*A*C; |
| 42 | if (R < 0) { |
| 43 | return 0; |
| 44 | } |
| 45 | R = sk_float_sqrt(R); |
| 46 | |
| 47 | #if 1 |
| 48 | float Q = B; |
| 49 | if (Q < 0) { |
| 50 | Q -= R; |
| 51 | } else { |
| 52 | Q += R; |
| 53 | } |
| 54 | #else |
| 55 | // on 10.6 this was much slower than the above branch :( |
| 56 | float Q = B + copysignf(R, B); |
| 57 | #endif |
| 58 | Q *= -0.5f; |
| 59 | if (0 == Q) { |
| 60 | roots[0] = 0; |
| 61 | return 1; |
| 62 | } |
| 63 | |
| 64 | float r0 = Q / A; |
| 65 | float r1 = C / Q; |
| 66 | roots[0] = r0 < r1 ? r0 : r1; |
| 67 | roots[1] = r0 > r1 ? r0 : r1; |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 68 | if (descendingOrder) { |
| 69 | SkTSwap(roots[0], roots[1]); |
| 70 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 71 | return 2; |
| 72 | } |
| 73 | |
| 74 | static float lerp(float x, float dx, float t) { |
| 75 | return x + t * dx; |
| 76 | } |
| 77 | |
| 78 | static float sqr(float x) { return x * x; } |
| 79 | |
| 80 | void TwoPtRadial::init(const SkPoint& center0, SkScalar rad0, |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 81 | const SkPoint& center1, SkScalar rad1, |
| 82 | bool flipped) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 83 | fCenterX = SkScalarToFloat(center0.fX); |
| 84 | fCenterY = SkScalarToFloat(center0.fY); |
| 85 | fDCenterX = SkScalarToFloat(center1.fX) - fCenterX; |
| 86 | fDCenterY = SkScalarToFloat(center1.fY) - fCenterY; |
| 87 | fRadius = SkScalarToFloat(rad0); |
| 88 | fDRadius = SkScalarToFloat(rad1) - fRadius; |
| 89 | |
| 90 | fA = sqr(fDCenterX) + sqr(fDCenterY) - sqr(fDRadius); |
| 91 | fRadius2 = sqr(fRadius); |
| 92 | fRDR = fRadius * fDRadius; |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 93 | |
| 94 | fFlipped = flipped; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 95 | } |
| 96 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 97 | TwoPtRadialContext::TwoPtRadialContext(const TwoPtRadial& rec, SkScalar fx, SkScalar fy, |
| 98 | SkScalar dfx, SkScalar dfy) |
| 99 | : fRec(rec) |
| 100 | , fRelX(SkScalarToFloat(fx) - rec.fCenterX) |
| 101 | , fRelY(SkScalarToFloat(fy) - rec.fCenterY) |
| 102 | , fIncX(SkScalarToFloat(dfx)) |
| 103 | , fIncY(SkScalarToFloat(dfy)) |
| 104 | , fB(-2 * (rec.fDCenterX * fRelX + rec.fDCenterY * fRelY + rec.fRDR)) |
| 105 | , fDB(-2 * (rec.fDCenterX * fIncX + rec.fDCenterY * fIncY)) {} |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 106 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 107 | SkFixed TwoPtRadialContext::nextT() { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 108 | float roots[2]; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 109 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 110 | float C = sqr(fRelX) + sqr(fRelY) - fRec.fRadius2; |
| 111 | int countRoots = find_quad_roots(fRec.fA, fB, C, roots, fRec.fFlipped); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 112 | |
| 113 | fRelX += fIncX; |
| 114 | fRelY += fIncY; |
| 115 | fB += fDB; |
| 116 | |
| 117 | if (0 == countRoots) { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 118 | return TwoPtRadial::kDontDrawT; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | // Prefer the bigger t value if both give a radius(t) > 0 |
| 122 | // find_quad_roots returns the values sorted, so we start with the last |
| 123 | float t = roots[countRoots - 1]; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 124 | float r = lerp(fRec.fRadius, fRec.fDRadius, t); |
fmalita | 5edf82e | 2016-03-03 06:41:54 -0800 | [diff] [blame] | 125 | if (r < 0) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 126 | t = roots[0]; // might be the same as roots[countRoots-1] |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 127 | r = lerp(fRec.fRadius, fRec.fDRadius, t); |
fmalita | 5edf82e | 2016-03-03 06:41:54 -0800 | [diff] [blame] | 128 | if (r < 0) { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 129 | return TwoPtRadial::kDontDrawT; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 130 | } |
| 131 | } |
| 132 | return SkFloatToFixed(t); |
| 133 | } |
| 134 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 135 | typedef void (*TwoPointConicalProc)(TwoPtRadialContext* rec, SkPMColor* dstC, |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 136 | const SkPMColor* cache, int toggle, int count); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 137 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 138 | static void twopoint_clamp(TwoPtRadialContext* rec, SkPMColor* SK_RESTRICT dstC, |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 139 | const SkPMColor* SK_RESTRICT cache, int toggle, |
| 140 | int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 141 | for (; count > 0; --count) { |
| 142 | SkFixed t = rec->nextT(); |
| 143 | if (TwoPtRadial::DontDrawT(t)) { |
| 144 | *dstC++ = 0; |
| 145 | } else { |
| 146 | SkFixed index = SkClampMax(t, 0xFFFF); |
| 147 | SkASSERT(index <= 0xFFFF); |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 148 | *dstC++ = cache[toggle + |
| 149 | (index >> SkGradientShaderBase::kCache32Shift)]; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 150 | } |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 151 | toggle = next_dither_toggle(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 152 | } |
| 153 | } |
| 154 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 155 | static void twopoint_repeat(TwoPtRadialContext* rec, SkPMColor* SK_RESTRICT dstC, |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 156 | const SkPMColor* SK_RESTRICT cache, int toggle, |
| 157 | int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 158 | for (; count > 0; --count) { |
| 159 | SkFixed t = rec->nextT(); |
| 160 | if (TwoPtRadial::DontDrawT(t)) { |
| 161 | *dstC++ = 0; |
| 162 | } else { |
| 163 | SkFixed index = repeat_tileproc(t); |
| 164 | SkASSERT(index <= 0xFFFF); |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 165 | *dstC++ = cache[toggle + |
| 166 | (index >> SkGradientShaderBase::kCache32Shift)]; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 167 | } |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 168 | toggle = next_dither_toggle(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 169 | } |
| 170 | } |
| 171 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 172 | static void twopoint_mirror(TwoPtRadialContext* rec, SkPMColor* SK_RESTRICT dstC, |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 173 | const SkPMColor* SK_RESTRICT cache, int toggle, |
| 174 | int count) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 175 | for (; count > 0; --count) { |
| 176 | SkFixed t = rec->nextT(); |
| 177 | if (TwoPtRadial::DontDrawT(t)) { |
| 178 | *dstC++ = 0; |
| 179 | } else { |
| 180 | SkFixed index = mirror_tileproc(t); |
| 181 | SkASSERT(index <= 0xFFFF); |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 182 | *dstC++ = cache[toggle + |
| 183 | (index >> SkGradientShaderBase::kCache32Shift)]; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 184 | } |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 185 | toggle = next_dither_toggle(toggle); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 186 | } |
| 187 | } |
| 188 | |
rileya@google.com | 98e8b6d | 2012-07-31 20:38:06 +0000 | [diff] [blame] | 189 | ///////////////////////////////////////////////////////////////////// |
| 190 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 191 | SkTwoPointConicalGradient::SkTwoPointConicalGradient( |
reed@google.com | 3d3a860 | 2013-05-24 14:58:44 +0000 | [diff] [blame] | 192 | const SkPoint& start, SkScalar startRadius, |
| 193 | const SkPoint& end, SkScalar endRadius, |
reed | addf2ed | 2014-08-11 08:28:24 -0700 | [diff] [blame] | 194 | bool flippedGrad, const Descriptor& desc) |
mtklein | cc695fe | 2014-12-10 10:29:19 -0800 | [diff] [blame] | 195 | : SkGradientShaderBase(desc, SkMatrix::I()) |
reed | addf2ed | 2014-08-11 08:28:24 -0700 | [diff] [blame] | 196 | , fCenter1(start) |
| 197 | , fCenter2(end) |
| 198 | , fRadius1(startRadius) |
| 199 | , fRadius2(endRadius) |
| 200 | , fFlippedGrad(flippedGrad) |
| 201 | { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 202 | // this is degenerate, and should be caught by our caller |
| 203 | SkASSERT(fCenter1 != fCenter2 || fRadius1 != fRadius2); |
mtklein | cc695fe | 2014-12-10 10:29:19 -0800 | [diff] [blame] | 204 | fRec.init(fCenter1, fRadius1, fCenter2, fRadius2, fFlippedGrad); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 205 | } |
| 206 | |
commit-bot@chromium.org | 3fbab82 | 2013-03-20 00:49:57 +0000 | [diff] [blame] | 207 | bool SkTwoPointConicalGradient::isOpaque() const { |
robertphillips@google.com | cb6d97c | 2013-07-09 13:50:09 +0000 | [diff] [blame] | 208 | // Because areas outside the cone are left untouched, we cannot treat the |
| 209 | // shader as opaque even if the gradient itself is opaque. |
| 210 | // TODO(junov): Compute whether the cone fills the plane crbug.com/222380 |
| 211 | return false; |
commit-bot@chromium.org | 3fbab82 | 2013-03-20 00:49:57 +0000 | [diff] [blame] | 212 | } |
| 213 | |
reed | 773ceda | 2016-03-03 18:18:25 -0800 | [diff] [blame] | 214 | size_t SkTwoPointConicalGradient::onContextSize(const ContextRec&) const { |
reed | a0cee5f | 2016-03-04 07:38:11 -0800 | [diff] [blame] | 215 | return sizeof(TwoPointConicalGradientContext); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 216 | } |
| 217 | |
commit-bot@chromium.org | ce56d96 | 2014-05-05 18:39:18 +0000 | [diff] [blame] | 218 | SkShader::Context* SkTwoPointConicalGradient::onCreateContext(const ContextRec& rec, |
| 219 | void* storage) const { |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 220 | return new (storage) TwoPointConicalGradientContext(*this, rec); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | SkTwoPointConicalGradient::TwoPointConicalGradientContext::TwoPointConicalGradientContext( |
commit-bot@chromium.org | e901b6d | 2014-05-01 19:31:31 +0000 | [diff] [blame] | 224 | const SkTwoPointConicalGradient& shader, const ContextRec& rec) |
| 225 | : INHERITED(shader, rec) |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 226 | { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 227 | // in general, we might discard based on computed-radius, so clear |
| 228 | // this flag (todo: sometimes we can detect that we never discard...) |
| 229 | fFlags &= ~kOpaqueAlpha_Flag; |
| 230 | } |
| 231 | |
| 232 | void SkTwoPointConicalGradient::TwoPointConicalGradientContext::shadeSpan( |
| 233 | int x, int y, SkPMColor* dstCParam, int count) { |
| 234 | const SkTwoPointConicalGradient& twoPointConicalGradient = |
| 235 | static_cast<const SkTwoPointConicalGradient&>(fShader); |
| 236 | |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 237 | int toggle = init_dither_toggle(x, y); |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 238 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 239 | SkASSERT(count > 0); |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 240 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 241 | SkPMColor* SK_RESTRICT dstC = dstCParam; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 242 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 243 | SkMatrix::MapXYProc dstProc = fDstToIndexProc; |
bsalomon@google.com | 100abf4 | 2012-09-05 17:40:04 +0000 | [diff] [blame] | 244 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 245 | const SkPMColor* SK_RESTRICT cache = fCache->getCache32(); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 246 | |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 247 | TwoPointConicalProc shadeProc = twopoint_repeat; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 248 | if (SkShader::kClamp_TileMode == twoPointConicalGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 249 | shadeProc = twopoint_clamp; |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 250 | } else if (SkShader::kMirror_TileMode == twoPointConicalGradient.fTileMode) { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 251 | shadeProc = twopoint_mirror; |
| 252 | } else { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 253 | SkASSERT(SkShader::kRepeat_TileMode == twoPointConicalGradient.fTileMode); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 254 | } |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 255 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 256 | if (fDstToIndexClass != kPerspective_MatrixClass) { |
| 257 | SkPoint srcPt; |
| 258 | dstProc(fDstToIndex, SkIntToScalar(x) + SK_ScalarHalf, |
| 259 | SkIntToScalar(y) + SK_ScalarHalf, &srcPt); |
| 260 | SkScalar dx, fx = srcPt.fX; |
| 261 | SkScalar dy, fy = srcPt.fY; |
rmistry@google.com | fbfcd56 | 2012-08-23 18:09:54 +0000 | [diff] [blame] | 262 | |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 263 | if (fDstToIndexClass == kFixedStepInX_MatrixClass) { |
benjaminwagner | 8e17556 | 2016-02-16 10:09:40 -0800 | [diff] [blame] | 264 | const auto step = fDstToIndex.fixedStepInX(SkIntToScalar(y)); |
| 265 | dx = step.fX; |
| 266 | dy = step.fY; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 267 | } else { |
| 268 | SkASSERT(fDstToIndexClass == kLinear_MatrixClass); |
| 269 | dx = fDstToIndex.getScaleX(); |
| 270 | dy = fDstToIndex.getSkewY(); |
| 271 | } |
| 272 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 273 | TwoPtRadialContext rec(twoPointConicalGradient.fRec, fx, fy, dx, dy); |
| 274 | (*shadeProc)(&rec, dstC, cache, toggle, count); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 275 | } else { // perspective case |
mike@reedtribe.org | 139a235 | 2013-11-14 20:15:51 +0000 | [diff] [blame] | 276 | SkScalar dstX = SkIntToScalar(x) + SK_ScalarHalf; |
| 277 | SkScalar dstY = SkIntToScalar(y) + SK_ScalarHalf; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 278 | for (; count > 0; --count) { |
| 279 | SkPoint srcPt; |
| 280 | dstProc(fDstToIndex, dstX, dstY, &srcPt); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 281 | TwoPtRadialContext rec(twoPointConicalGradient.fRec, srcPt.fX, srcPt.fY, 0, 0); |
| 282 | (*shadeProc)(&rec, dstC, cache, toggle, 1); |
mike@reedtribe.org | 139a235 | 2013-11-14 20:15:51 +0000 | [diff] [blame] | 283 | |
| 284 | dstX += SK_Scalar1; |
reed@google.com | 6004029 | 2013-02-04 18:21:23 +0000 | [diff] [blame] | 285 | toggle = next_dither_toggle(toggle); |
mike@reedtribe.org | 139a235 | 2013-11-14 20:15:51 +0000 | [diff] [blame] | 286 | dstC += 1; |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 287 | } |
| 288 | } |
| 289 | } |
| 290 | |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 291 | // Returns the original non-sorted version of the gradient |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 292 | SkShader::GradientType SkTwoPointConicalGradient::asAGradient( |
| 293 | GradientInfo* info) const { |
| 294 | if (info) { |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 295 | commonAsAGradient(info, fFlippedGrad); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 296 | info->fPoint[0] = fCenter1; |
| 297 | info->fPoint[1] = fCenter2; |
| 298 | info->fRadius[0] = fRadius1; |
| 299 | info->fRadius[1] = fRadius2; |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 300 | if (fFlippedGrad) { |
| 301 | SkTSwap(info->fPoint[0], info->fPoint[1]); |
| 302 | SkTSwap(info->fRadius[0], info->fRadius[1]); |
| 303 | } |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 304 | } |
| 305 | return kConical_GradientType; |
| 306 | } |
| 307 | |
reed | 60c9b58 | 2016-04-03 09:11:13 -0700 | [diff] [blame^] | 308 | sk_sp<SkFlattenable> SkTwoPointConicalGradient::CreateProc(SkReadBuffer& buffer) { |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 309 | DescriptorScope desc; |
| 310 | if (!desc.unflatten(buffer)) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 311 | return nullptr; |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 312 | } |
| 313 | SkPoint c1 = buffer.readPoint(); |
| 314 | SkPoint c2 = buffer.readPoint(); |
| 315 | SkScalar r1 = buffer.readScalar(); |
| 316 | SkScalar r2 = buffer.readScalar(); |
| 317 | |
| 318 | if (buffer.readBool()) { // flipped |
| 319 | SkTSwap(c1, c2); |
| 320 | SkTSwap(r1, r2); |
| 321 | |
| 322 | SkColor* colors = desc.mutableColors(); |
| 323 | SkScalar* pos = desc.mutablePos(); |
| 324 | const int last = desc.fCount - 1; |
| 325 | const int half = desc.fCount >> 1; |
| 326 | for (int i = 0; i < half; ++i) { |
| 327 | SkTSwap(colors[i], colors[last - i]); |
| 328 | if (pos) { |
| 329 | SkScalar tmp = pos[i]; |
| 330 | pos[i] = SK_Scalar1 - pos[last - i]; |
| 331 | pos[last - i] = SK_Scalar1 - tmp; |
| 332 | } |
| 333 | } |
| 334 | if (pos) { |
| 335 | if (desc.fCount & 1) { |
| 336 | pos[half] = SK_Scalar1 - pos[half]; |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | |
reed | 8a21c9f | 2016-03-08 18:50:00 -0800 | [diff] [blame] | 341 | return SkGradientShader::MakeTwoPointConical(c1, r1, c2, r2, desc.fColors, desc.fPos, |
| 342 | desc.fCount, desc.fTileMode, desc.fGradFlags, |
reed | 60c9b58 | 2016-04-03 09:11:13 -0700 | [diff] [blame^] | 343 | desc.fLocalMatrix); |
reed | 9fa60da | 2014-08-21 07:59:51 -0700 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | void SkTwoPointConicalGradient::flatten(SkWriteBuffer& buffer) const { |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 347 | this->INHERITED::flatten(buffer); |
| 348 | buffer.writePoint(fCenter1); |
| 349 | buffer.writePoint(fCenter2); |
| 350 | buffer.writeScalar(fRadius1); |
| 351 | buffer.writeScalar(fRadius2); |
commit-bot@chromium.org | 44d83c1 | 2014-04-21 13:10:25 +0000 | [diff] [blame] | 352 | buffer.writeBool(fFlippedGrad); |
rileya@google.com | 589708b | 2012-07-26 20:04:23 +0000 | [diff] [blame] | 353 | } |
| 354 | |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 355 | #if SK_SUPPORT_GPU |
| 356 | |
dandov | 9de5b51 | 2014-06-10 14:38:28 -0700 | [diff] [blame] | 357 | #include "SkGr.h" |
| 358 | |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 359 | const GrFragmentProcessor* SkTwoPointConicalGradient::asFragmentProcessor( |
| 360 | GrContext* context, |
| 361 | const SkMatrix& viewM, |
| 362 | const SkMatrix* localMatrix, |
bsalomon | 4a33952 | 2015-10-06 08:40:50 -0700 | [diff] [blame] | 363 | SkFilterQuality) const { |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 364 | SkASSERT(context); |
bsalomon@google.com | f94b3a4 | 2012-10-31 18:09:01 +0000 | [diff] [blame] | 365 | SkASSERT(fPtsToUnit.isIdentity()); |
bsalomon | c21b09e | 2015-08-28 18:46:56 -0700 | [diff] [blame] | 366 | SkAutoTUnref<const GrFragmentProcessor> inner( |
bsalomon | 4a33952 | 2015-10-06 08:40:50 -0700 | [diff] [blame] | 367 | Gr2PtConicalGradientEffect::Create(context, *this, fTileMode, localMatrix)); |
bsalomon | f1b7a1d | 2015-09-28 06:26:28 -0700 | [diff] [blame] | 368 | return GrFragmentProcessor::MulOutputByInputAlpha(inner); |
bsalomon@google.com | cf8fb1f | 2012-08-02 14:03:32 +0000 | [diff] [blame] | 369 | } |
| 370 | |
twiz@google.com | a5e65ec | 2012-08-02 15:15:16 +0000 | [diff] [blame] | 371 | #endif |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 372 | |
commit-bot@chromium.org | 0f10f7b | 2014-03-13 18:02:17 +0000 | [diff] [blame] | 373 | #ifndef SK_IGNORE_TO_STRING |
robertphillips@google.com | 76f9e93 | 2013-01-15 20:17:47 +0000 | [diff] [blame] | 374 | void SkTwoPointConicalGradient::toString(SkString* str) const { |
| 375 | str->append("SkTwoPointConicalGradient: ("); |
| 376 | |
| 377 | str->append("center1: ("); |
| 378 | str->appendScalar(fCenter1.fX); |
| 379 | str->append(", "); |
| 380 | str->appendScalar(fCenter1.fY); |
| 381 | str->append(") radius1: "); |
| 382 | str->appendScalar(fRadius1); |
| 383 | str->append(" "); |
| 384 | |
| 385 | str->append("center2: ("); |
| 386 | str->appendScalar(fCenter2.fX); |
| 387 | str->append(", "); |
| 388 | str->appendScalar(fCenter2.fY); |
| 389 | str->append(") radius2: "); |
| 390 | str->appendScalar(fRadius2); |
| 391 | str->append(" "); |
| 392 | |
| 393 | this->INHERITED::toString(str); |
| 394 | |
| 395 | str->append(")"); |
| 396 | } |
| 397 | #endif |