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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #include "SkXfermode.h" | 8 #include "SkXfermode.h" |
9 #include "SkXfermode_proccoeff.h" | 9 #include "SkXfermode_proccoeff.h" |
10 #include "SkColorPriv.h" | 10 #include "SkColorPriv.h" |
11 #include "SkMathPriv.h" | 11 #include "SkMathPriv.h" |
12 #include "SkOnce.h" | 12 #include "SkOnce.h" |
13 #include "SkOpts.h" | 13 #include "SkOpts.h" |
14 #include "SkRasterPipeline.h" | |
14 #include "SkReadBuffer.h" | 15 #include "SkReadBuffer.h" |
15 #include "SkString.h" | 16 #include "SkString.h" |
16 #include "SkWriteBuffer.h" | 17 #include "SkWriteBuffer.h" |
17 #include "SkPM4f.h" | 18 #include "SkPM4f.h" |
18 | 19 |
19 #if SK_SUPPORT_GPU | 20 #if SK_SUPPORT_GPU |
20 #include "GrFragmentProcessor.h" | 21 #include "GrFragmentProcessor.h" |
21 #include "effects/GrCustomXfermode.h" | 22 #include "effects/GrCustomXfermode.h" |
22 #include "effects/GrPorterDuffXferProcessor.h" | 23 #include "effects/GrPorterDuffXferProcessor.h" |
23 #include "effects/GrXfermodeFragmentProcessor.h" | 24 #include "effects/GrXfermodeFragmentProcessor.h" |
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1424 return this->onAppendStages(pipeline); | 1425 return this->onAppendStages(pipeline); |
1425 } | 1426 } |
1426 | 1427 |
1427 bool SkXfermode::onAppendStages(SkRasterPipeline*) const { | 1428 bool SkXfermode::onAppendStages(SkRasterPipeline*) const { |
1428 return false; | 1429 return false; |
1429 } | 1430 } |
1430 | 1431 |
1431 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode) | 1432 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode) |
1432 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode) | 1433 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode) |
1433 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END | 1434 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
1435 | |
1436 static Sk4f inv(const Sk4f& x) { return 1.0f - x; } | |
1437 | |
1438 // Most of these modes apply the same logic kernel to each channel. | |
1439 template <Sk4f kernel(const Sk4f& s, const Sk4f& sa, const Sk4f& d, const Sk4f& da)> | |
reed1
2016/07/25 16:40:28
given vector_call, do we still need to pass by con
mtklein
2016/07/25 17:48:18
Yes we could require kernel's type to be
Sk4f
| |
1440 static void SK_VECTORCALL rgba(SkRasterPipeline::Stage* st, size_t x, | |
1441 Sk4f r, Sk4f g, Sk4f b, Sk4f a, | |
1442 Sk4f dr, Sk4f dg, Sk4f db, Sk4f da) { | |
1443 r = kernel(r,a,dr,da); | |
1444 g = kernel(g,a,dg,da); | |
1445 b = kernel(b,a,db,da); | |
1446 a = kernel(a,a,da,da); | |
1447 st->next(x, r,g,b,a, dr,dg,db,da); | |
1448 } | |
1449 | |
1450 #define KERNEL(name) static Sk4f name(const Sk4f& s, const Sk4f& sa, const Sk4f& d, const Sk4f& da) | |
1451 KERNEL(clear) { return 0.0f; } | |
1452 KERNEL(dst) { return d; } | |
1453 KERNEL(dstover) { return d + inv(da)*s; } | |
1454 | |
1455 KERNEL(srcin) { return s * da; } | |
1456 KERNEL(srcout) { return s * inv(da); } | |
1457 KERNEL(srcatop) { return s*da + d*inv(sa); } | |
1458 KERNEL(dstin) { return srcin (d,da,s,sa); } | |
1459 KERNEL(dstout) { return srcout (d,da,s,sa); } | |
1460 KERNEL(dstatop) { return srcatop(d,da,s,sa); } | |
1461 | |
1462 KERNEL(modulate) { return s*d; } | |
1463 KERNEL(multiply) { return s*inv(da) + d*inv(sa) + s*d; } | |
1464 KERNEL(plus) { return s + d; } | |
1465 KERNEL(screen) { return s + d - s*d; } | |
1466 KERNEL(xor_) { return s*inv(da) + d*inv(sa); } | |
1467 | |
1468 // Most of the rest apply the same logic to each color channel, and srcover's lo gic to alpha. | |
1469 // (darken and lighten can actually go either way, but they're a little faster t his way.) | |
1470 template <Sk4f kernel(const Sk4f& s, const Sk4f& sa, const Sk4f& d, const Sk4f& da)> | |
1471 static void SK_VECTORCALL rgb_srcover(SkRasterPipeline::Stage* st, size_t x, | |
1472 Sk4f r, Sk4f g, Sk4f b, Sk4f a, | |
1473 Sk4f dr, Sk4f dg, Sk4f db, Sk4f da) { | |
1474 r = kernel(r,a,dr,da); | |
1475 g = kernel(g,a,dg,da); | |
1476 b = kernel(b,a,db,da); | |
1477 a = a + da*inv(a); | |
1478 st->next(x, r,g,b,a, dr,dg,db,da); | |
1479 } | |
1480 | |
1481 KERNEL(colorburn) { | |
1482 return (d == da ).thenElse(d + s*inv(da), | |
1483 (s == 0.0f).thenElse(s + d*inv(sa), | |
1484 sa*(da - Sk4f::Min(da, (da-d)*sa/s)) + s*inv(da) + d*inv(sa))); | |
1485 } | |
1486 KERNEL(colordodge) { | |
1487 return (d == 0.0f).thenElse(d + s*inv(da), | |
1488 (s == sa ).thenElse(s + d*inv(sa), | |
1489 sa*Sk4f::Min(da, (d*sa)/(sa - s)) + s*inv(da) + d*inv(sa))); | |
1490 } | |
1491 KERNEL(darken) { return s + d - Sk4f::Max(s*da, d*sa); } | |
1492 KERNEL(difference) { return s + d - 2.0f*Sk4f::Min(s*da,d*sa); } | |
1493 KERNEL(exclusion) { return s + d - 2.0f*s*d; } | |
1494 KERNEL(hardlight) { | |
1495 return s*inv(da) + d*inv(sa) | |
1496 + (2.0f*s <= sa).thenElse(2.0f*s*d, sa*da - 2.0f*(da-d)*(sa-s)); | |
1497 } | |
1498 KERNEL(lighten) { return s + d - Sk4f::Min(s*da, d*sa); } | |
1499 KERNEL(overlay) { return hardlight(d,da,s,sa); } | |
1500 KERNEL(softlight) { | |
1501 Sk4f m = (da > 0.0f).thenElse(d / da, 0.0f), | |
1502 s2 = 2.0f*s, | |
1503 m4 = 4.0f*m; | |
1504 | |
1505 // The logic forks three ways: | |
1506 // 1. dark src? | |
1507 // 2. light src, dark dst? | |
1508 // 3. light src, light dst? | |
1509 Sk4f darkSrc = d*(sa + (s2 - sa)*(1.0f - m)), // Used in case 1. | |
1510 darkDst = (m4*m4 + m4)*(m - 1.0f) + 7.0f*m, // Used in case 2. | |
1511 liteDst = m.rsqrt().invert() - m, // Used in case 3. | |
1512 liteSrc = d*sa + da*(s2 - sa) * (4.0f*d <= da).thenElse(darkDst, liteDs t); // 2 or 3? | |
1513 return s*inv(da) + d*inv(sa) + (s2 <= sa).thenElse(darkSrc, liteSrc); // 1 or (2 or 3)? | |
1514 } | |
1515 #undef KERNEL | |
1516 | |
1517 bool SkProcCoeffXfermode::onAppendStages(SkRasterPipeline* p) const { | |
1518 switch (fMode) { | |
1519 case kSrcOver_Mode: SkASSERT(false); return false; // Well how did we g et here? | |
1520 | |
1521 case kSrc_Mode: /*This stage is a no-op.*/ return true; | |
1522 case kDst_Mode: p->append(rgba<dst>); return true; | |
1523 case kSrcATop_Mode: p->append(rgba<srcatop>); return true; | |
1524 case kDstATop_Mode: p->append(rgba<dstatop>); return true; | |
1525 case kSrcIn_Mode: p->append(rgba<srcin>); return true; | |
1526 case kDstIn_Mode: p->append(rgba<dstin>); return true; | |
1527 case kSrcOut_Mode: p->append(rgba<srcout>); return true; | |
1528 case kDstOut_Mode: p->append(rgba<dstout>); return true; | |
1529 case kDstOver_Mode: p->append(rgba<dstover>); return true; | |
1530 | |
1531 case kClear_Mode: p->append(rgba<clear>); return true; | |
1532 case kModulate_Mode: p->append(rgba<modulate>); return true; | |
1533 case kMultiply_Mode: p->append(rgba<multiply>); return true; | |
1534 case kPlus_Mode: p->append(rgba<plus>); return true; | |
1535 case kScreen_Mode: p->append(rgba<screen>); return true; | |
1536 case kXor_Mode: p->append(rgba<xor_>); return true; | |
1537 | |
1538 case kColorBurn_Mode: p->append(rgb_srcover<colorburn>); return true; | |
1539 case kColorDodge_Mode: p->append(rgb_srcover<colordodge>); return true; | |
1540 case kDarken_Mode: p->append(rgb_srcover<darken>); return true; | |
1541 case kDifference_Mode: p->append(rgb_srcover<difference>); return true; | |
1542 case kExclusion_Mode: p->append(rgb_srcover<exclusion>); return true; | |
1543 case kHardLight_Mode: p->append(rgb_srcover<hardlight>); return true; | |
1544 case kLighten_Mode: p->append(rgb_srcover<lighten>); return true; | |
1545 case kOverlay_Mode: p->append(rgb_srcover<overlay>); return true; | |
1546 case kSoftLight_Mode: p->append(rgb_srcover<softlight>); return true; | |
1547 | |
1548 // TODO | |
1549 case kColor_Mode: return false; | |
1550 case kHue_Mode: return false; | |
1551 case kLuminosity_Mode: return false; | |
1552 case kSaturation_Mode: return false; | |
1553 } | |
1554 return false; | |
1555 } | |
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