2 * Copyright 2006 The Android Open Source Project
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
9 #include "Sk4fLinearGradient.h"
10 #include "SkColorSpace_XYZ.h"
11 #include "SkGradientShaderPriv.h"
13 #include "SkLinearGradient.h"
14 #include "SkMallocPixelRef.h"
15 #include "SkRadialGradient.h"
16 #include "SkSweepGradient.h"
17 #include "SkTwoPointConicalGradient.h"
18 #include "../../jumper/SkJumper.h"
21 enum GradientSerializationFlags {
22 // Bits 29:31 used for various boolean flags
23 kHasPosition_GSF = 0x80000000,
24 kHasLocalMatrix_GSF = 0x40000000,
25 kHasColorSpace_GSF = 0x20000000,
29 // Bits 8:11 for fTileMode
30 kTileModeShift_GSF = 8,
31 kTileModeMask_GSF = 0xF,
33 // Bits 0:7 for fGradFlags (note that kForce4fContext_PrivateFlag is 0x80)
34 kGradFlagsShift_GSF = 0,
35 kGradFlagsMask_GSF = 0xFF,
38 void SkGradientShaderBase::Descriptor::flatten(SkWriteBuffer& buffer) const {
41 flags |= kHasPosition_GSF;
44 flags |= kHasLocalMatrix_GSF;
46 sk_sp<SkData> colorSpaceData = fColorSpace ? fColorSpace->serialize() : nullptr;
48 flags |= kHasColorSpace_GSF;
50 SkASSERT(static_cast<uint32_t>(fTileMode) <= kTileModeMask_GSF);
51 flags |= (fTileMode << kTileModeShift_GSF);
52 SkASSERT(fGradFlags <= kGradFlagsMask_GSF);
53 flags |= (fGradFlags << kGradFlagsShift_GSF);
55 buffer.writeUInt(flags);
57 buffer.writeColor4fArray(fColors, fCount);
59 buffer.writeDataAsByteArray(colorSpaceData.get());
62 buffer.writeScalarArray(fPos, fCount);
65 buffer.writeMatrix(*fLocalMatrix);
69 bool SkGradientShaderBase::DescriptorScope::unflatten(SkReadBuffer& buffer) {
70 if (buffer.isVersionLT(SkReadBuffer::kGradientShaderFloatColor_Version)) {
71 fCount = buffer.getArrayCount();
72 if (fCount > kStorageCount) {
73 size_t allocSize = (sizeof(SkColor4f) + sizeof(SkScalar)) * fCount;
74 fDynamicStorage.reset(allocSize);
75 fColors = (SkColor4f*)fDynamicStorage.get();
76 fPos = (SkScalar*)(fColors + fCount);
78 fColors = fColorStorage;
82 // Old gradients serialized SkColor. Read that to a temporary location, then convert.
83 SkSTArray<2, SkColor, true> colors;
84 colors.resize_back(fCount);
85 if (!buffer.readColorArray(colors.begin(), fCount)) {
88 for (int i = 0; i < fCount; ++i) {
89 mutableColors()[i] = SkColor4f::FromColor(colors[i]);
92 if (buffer.readBool()) {
93 if (!buffer.readScalarArray(const_cast<SkScalar*>(fPos), fCount)) {
100 fColorSpace = nullptr;
101 fTileMode = (SkShader::TileMode)buffer.read32();
102 fGradFlags = buffer.read32();
104 if (buffer.readBool()) {
105 fLocalMatrix = &fLocalMatrixStorage;
106 buffer.readMatrix(&fLocalMatrixStorage);
108 fLocalMatrix = nullptr;
111 // New gradient format. Includes floating point color, color space, densely packed flags
112 uint32_t flags = buffer.readUInt();
114 fTileMode = (SkShader::TileMode)((flags >> kTileModeShift_GSF) & kTileModeMask_GSF);
115 fGradFlags = (flags >> kGradFlagsShift_GSF) & kGradFlagsMask_GSF;
117 fCount = buffer.getArrayCount();
118 if (fCount > kStorageCount) {
119 size_t allocSize = (sizeof(SkColor4f) + sizeof(SkScalar)) * fCount;
120 fDynamicStorage.reset(allocSize);
121 fColors = (SkColor4f*)fDynamicStorage.get();
122 fPos = (SkScalar*)(fColors + fCount);
124 fColors = fColorStorage;
127 if (!buffer.readColor4fArray(mutableColors(), fCount)) {
130 if (SkToBool(flags & kHasColorSpace_GSF)) {
131 sk_sp<SkData> data = buffer.readByteArrayAsData();
132 fColorSpace = SkColorSpace::Deserialize(data->data(), data->size());
134 fColorSpace = nullptr;
136 if (SkToBool(flags & kHasPosition_GSF)) {
137 if (!buffer.readScalarArray(mutablePos(), fCount)) {
143 if (SkToBool(flags & kHasLocalMatrix_GSF)) {
144 fLocalMatrix = &fLocalMatrixStorage;
145 buffer.readMatrix(&fLocalMatrixStorage);
147 fLocalMatrix = nullptr;
150 return buffer.isValid();
153 ////////////////////////////////////////////////////////////////////////////////////////////
155 SkGradientShaderBase::SkGradientShaderBase(const Descriptor& desc, const SkMatrix& ptsToUnit)
156 : INHERITED(desc.fLocalMatrix)
157 , fPtsToUnit(ptsToUnit)
159 fPtsToUnit.getType(); // Precache so reads are threadsafe.
160 SkASSERT(desc.fCount > 1);
162 fGradFlags = static_cast<uint8_t>(desc.fGradFlags);
164 SkASSERT((unsigned)desc.fTileMode < SkShader::kTileModeCount);
165 SkASSERT(SkShader::kTileModeCount == SK_ARRAY_COUNT(gTileProcs));
166 fTileMode = desc.fTileMode;
167 fTileProc = gTileProcs[desc.fTileMode];
169 /* Note: we let the caller skip the first and/or last position.
170 i.e. pos[0] = 0.3, pos[1] = 0.7
171 In these cases, we insert dummy entries to ensure that the final data
172 will be bracketed by [0, 1].
173 i.e. our_pos[0] = 0, our_pos[1] = 0.3, our_pos[2] = 0.7, our_pos[3] = 1
175 Thus colorCount (the caller's value, and fColorCount (our value) may
176 differ by up to 2. In the above example:
180 fColorCount = desc.fCount;
181 // check if we need to add in dummy start and/or end position/colors
182 bool dummyFirst = false;
183 bool dummyLast = false;
185 dummyFirst = desc.fPos[0] != 0;
186 dummyLast = desc.fPos[desc.fCount - 1] != SK_Scalar1;
187 fColorCount += dummyFirst + dummyLast;
190 if (fColorCount > kColorStorageCount) {
191 size_t size = sizeof(SkColor) + sizeof(SkColor4f) + sizeof(Rec);
193 size += sizeof(SkScalar);
195 fOrigColors = reinterpret_cast<SkColor*>(sk_malloc_throw(size * fColorCount));
198 fOrigColors = fStorage;
201 fOrigColors4f = (SkColor4f*)(fOrigColors + fColorCount);
203 // Now copy over the colors, adding the dummies as needed
204 SkColor4f* origColors = fOrigColors4f;
206 *origColors++ = desc.fColors[0];
208 memcpy(origColors, desc.fColors, desc.fCount * sizeof(SkColor4f));
210 origColors += desc.fCount;
211 *origColors = desc.fColors[desc.fCount - 1];
214 // Convert our SkColor4f colors to SkColor as well. Note that this is incorrect if the
215 // source colors are not in sRGB gamut. We would need to do a gamut transformation, but
216 // SkColorSpaceXform can't do that (yet). GrColorSpaceXform can, but we may not have GPU
217 // support compiled in here. For the common case (sRGB colors), this does the right thing.
218 for (int i = 0; i < fColorCount; ++i) {
219 fOrigColors[i] = fOrigColors4f[i].toSkColor();
222 if (!desc.fColorSpace) {
223 // This happens if we were constructed from SkColors, so our colors are really sRGB
224 fColorSpace = SkColorSpace::MakeSRGBLinear();
226 // The color space refers to the float colors, so it must be linear gamma
227 SkASSERT(desc.fColorSpace->gammaIsLinear());
228 fColorSpace = desc.fColorSpace;
231 if (desc.fPos && fColorCount) {
232 fOrigPos = (SkScalar*)(fOrigColors4f + fColorCount);
233 fRecs = (Rec*)(fOrigPos + fColorCount);
236 fRecs = (Rec*)(fOrigColors4f + fColorCount);
239 if (fColorCount > 2) {
242 // recs->fScale = 0; // unused;
245 SkScalar* origPosPtr = fOrigPos;
248 /* We need to convert the user's array of relative positions into
249 fixed-point positions and scale factors. We need these results
250 to be strictly monotonic (no two values equal or out of order).
251 Hence this complex loop that just jams a zero for the scale
252 value if it sees a segment out of order, and it assures that
253 we start at 0 and end at 1.0
256 int startIndex = dummyFirst ? 0 : 1;
257 int count = desc.fCount + dummyLast;
258 for (int i = startIndex; i < count; i++) {
259 // force the last value to be 1.0
261 if (i == desc.fCount) { // we're really at the dummyLast
264 curr = SkScalarPin(desc.fPos[i], 0, 1);
266 *origPosPtr++ = curr;
268 recs->fPos = SkScalarToFixed(curr);
269 SkFixed diff = SkScalarToFixed(curr - prev);
271 recs->fScale = (1 << 24) / diff;
273 recs->fScale = 0; // ignore this segment
275 // get ready for the next value
279 } else { // assume even distribution
282 SkFixed dp = SK_Fixed1 / (desc.fCount - 1);
284 SkFixed scale = (desc.fCount - 1) << 8; // (1 << 24) / dp
285 for (int i = 1; i < desc.fCount - 1; i++) {
287 recs->fScale = scale;
291 recs->fPos = SK_Fixed1;
292 recs->fScale = scale;
294 } else if (desc.fPos) {
295 SkASSERT(2 == fColorCount);
296 fOrigPos[0] = SkScalarPin(desc.fPos[0], 0, 1);
297 fOrigPos[1] = SkScalarPin(desc.fPos[1], fOrigPos[0], 1);
298 if (0 == fOrigPos[0] && 1 == fOrigPos[1]) {
305 SkGradientShaderBase::~SkGradientShaderBase() {
306 if (fOrigColors != fStorage) {
307 sk_free(fOrigColors);
311 void SkGradientShaderBase::initCommon() {
312 unsigned colorAlpha = 0xFF;
313 for (int i = 0; i < fColorCount; i++) {
314 colorAlpha &= SkColorGetA(fOrigColors[i]);
316 fColorsAreOpaque = colorAlpha == 0xFF;
319 void SkGradientShaderBase::flatten(SkWriteBuffer& buffer) const {
321 desc.fColors = fOrigColors4f;
322 desc.fColorSpace = fColorSpace;
323 desc.fPos = fOrigPos;
324 desc.fCount = fColorCount;
325 desc.fTileMode = fTileMode;
326 desc.fGradFlags = fGradFlags;
328 const SkMatrix& m = this->getLocalMatrix();
329 desc.fLocalMatrix = m.isIdentity() ? nullptr : &m;
330 desc.flatten(buffer);
333 void SkGradientShaderBase::FlipGradientColors(SkColor* colorDst, Rec* recDst,
334 SkColor* colorSrc, Rec* recSrc,
336 SkAutoSTArray<8, SkColor> colorsTemp(count);
337 for (int i = 0; i < count; ++i) {
338 int offset = count - i - 1;
339 colorsTemp[i] = colorSrc[offset];
342 SkAutoSTArray<8, Rec> recsTemp(count);
343 for (int i = 0; i < count; ++i) {
344 int offset = count - i - 1;
345 recsTemp[i].fPos = SK_Fixed1 - recSrc[offset].fPos;
346 recsTemp[i].fScale = recSrc[offset].fScale;
348 memcpy(recDst, recsTemp.get(), count * sizeof(Rec));
350 memcpy(colorDst, colorsTemp.get(), count * sizeof(SkColor));
353 static void add_stop_color(SkJumper_GradientCtx* ctx, size_t stop, SkPM4f Fs, SkPM4f Bs) {
354 (ctx->fs[0])[stop] = Fs.r();
355 (ctx->fs[1])[stop] = Fs.g();
356 (ctx->fs[2])[stop] = Fs.b();
357 (ctx->fs[3])[stop] = Fs.a();
358 (ctx->bs[0])[stop] = Bs.r();
359 (ctx->bs[1])[stop] = Bs.g();
360 (ctx->bs[2])[stop] = Bs.b();
361 (ctx->bs[3])[stop] = Bs.a();
364 static void add_const_color(SkJumper_GradientCtx* ctx, size_t stop, SkPM4f color) {
365 add_stop_color(ctx, stop, SkPM4f::FromPremulRGBA(0,0,0,0), color);
368 // Calculate a factor F and a bias B so that color = F*t + B when t is in range of
369 // the stop. Assume that the distance between stops is 1/gapCount.
370 static void init_stop_evenly(
371 SkJumper_GradientCtx* ctx, float gapCount, size_t stop, SkPM4f c_l, SkPM4f c_r) {
372 // Clankium's GCC 4.9 targeting ARMv7 is barfing when we use Sk4f math here, so go scalar...
374 (c_r.r() - c_l.r()) * gapCount,
375 (c_r.g() - c_l.g()) * gapCount,
376 (c_r.b() - c_l.b()) * gapCount,
377 (c_r.a() - c_l.a()) * gapCount,
380 c_l.r() - Fs.r()*(stop/gapCount),
381 c_l.g() - Fs.g()*(stop/gapCount),
382 c_l.b() - Fs.b()*(stop/gapCount),
383 c_l.a() - Fs.a()*(stop/gapCount),
385 add_stop_color(ctx, stop, Fs, Bs);
388 // For each stop we calculate a bias B and a scale factor F, such that
389 // for any t between stops n and n+1, the color we want is B[n] + F[n]*t.
390 static void init_stop_pos(
391 SkJumper_GradientCtx* ctx, size_t stop, float t_l, float t_r, SkPM4f c_l, SkPM4f c_r) {
392 // See note about Clankium's old compiler in init_stop_evenly().
394 (c_r.r() - c_l.r()) / (t_r - t_l),
395 (c_r.g() - c_l.g()) / (t_r - t_l),
396 (c_r.b() - c_l.b()) / (t_r - t_l),
397 (c_r.a() - c_l.a()) / (t_r - t_l),
400 c_l.r() - Fs.r()*t_l,
401 c_l.g() - Fs.g()*t_l,
402 c_l.b() - Fs.b()*t_l,
403 c_l.a() - Fs.a()*t_l,
406 add_stop_color(ctx, stop, Fs, Bs);
409 bool SkGradientShaderBase::onAppendStages(SkRasterPipeline* p,
413 const SkPaint& paint,
414 const SkMatrix* localM) const {
416 if (!this->computeTotalInverse(ctm, localM, &matrix)) {
420 SkRasterPipeline_<256> subclass;
421 if (!this->adjustMatrixAndAppendStages(alloc, &matrix, &subclass)) {
425 auto* m = alloc->makeArrayDefault<float>(9);
426 if (matrix.asAffine(m)) {
427 p->append(SkRasterPipeline::matrix_2x3, m);
430 p->append(SkRasterPipeline::matrix_perspective, m);
436 case kMirror_TileMode: p->append(SkRasterPipeline::mirror_x_1); break;
437 case kRepeat_TileMode: p->append(SkRasterPipeline::repeat_x_1); break;
438 case kClamp_TileMode:
440 // We clamp only when the stops are evenly spaced.
441 // If not, there may be hard stops, and clamping ruins hard stops at 0 and/or 1.
442 // In that case, we must make sure we're using the general "gradient" stage,
443 // which is the only stage that will correctly handle unclamped t.
444 p->append(SkRasterPipeline::clamp_x_1);
448 const bool premulGrad = fGradFlags & SkGradientShader::kInterpolateColorsInPremul_Flag;
449 auto prepareColor = [premulGrad, dstCS, this](int i) {
450 SkColor4f c = dstCS ? to_colorspace(fOrigColors4f[i], fColorSpace.get(), dstCS)
451 : SkColor4f_from_SkColor(fOrigColors[i], nullptr);
452 return premulGrad ? c.premul()
453 : SkPM4f::From4f(Sk4f::Load(&c));
456 // The two-stop case with stops at 0 and 1.
457 if (fColorCount == 2 && fOrigPos == nullptr) {
458 const SkPM4f c_l = prepareColor(0),
459 c_r = prepareColor(1);
461 // See F and B below.
462 auto* f_and_b = alloc->makeArrayDefault<SkPM4f>(2);
463 f_and_b[0] = SkPM4f::From4f(c_r.to4f() - c_l.to4f());
466 p->append(SkRasterPipeline::evenly_spaced_2_stop_gradient, f_and_b);
468 auto* ctx = alloc->make<SkJumper_GradientCtx>();
470 // Note: In order to handle clamps in search, the search assumes a stop conceptully placed
471 // at -inf. Therefore, the max number of stops is fColorCount+1.
472 for (int i = 0; i < 4; i++) {
473 // Allocate at least at for the AVX2 gather from a YMM register.
474 ctx->fs[i] = alloc->makeArray<float>(std::max(fColorCount+1, 8));
475 ctx->bs[i] = alloc->makeArray<float>(std::max(fColorCount+1, 8));
478 if (fOrigPos == nullptr) {
479 // Handle evenly distributed stops.
481 size_t stopCount = fColorCount;
482 float gapCount = stopCount - 1;
484 SkPM4f c_l = prepareColor(0);
485 for (size_t i = 0; i < stopCount - 1; i++) {
486 SkPM4f c_r = prepareColor(i + 1);
487 init_stop_evenly(ctx, gapCount, i, c_l, c_r);
490 add_const_color(ctx, stopCount - 1, c_l);
492 ctx->stopCount = stopCount;
493 p->append(SkRasterPipeline::evenly_spaced_gradient, ctx);
495 // Handle arbitrary stops.
497 ctx->ts = alloc->makeArray<float>(fColorCount+1);
499 // Remove the dummy stops inserted by SkGradientShaderBase::SkGradientShaderBase
500 // because they are naturally handled by the search method.
503 if (fColorCount > 2) {
504 firstStop = fOrigColors4f[0] != fOrigColors4f[1] ? 0 : 1;
505 lastStop = fOrigColors4f[fColorCount - 2] != fOrigColors4f[fColorCount - 1]
506 ? fColorCount - 1 : fColorCount - 2;
512 size_t stopCount = 0;
513 float t_l = fOrigPos[firstStop];
514 SkPM4f c_l = prepareColor(firstStop);
515 add_const_color(ctx, stopCount++, c_l);
516 // N.B. lastStop is the index of the last stop, not one after.
517 for (int i = firstStop; i < lastStop; i++) {
518 float t_r = fOrigPos[i + 1];
519 SkPM4f c_r = prepareColor(i + 1);
521 init_stop_pos(ctx, stopCount, t_l, t_r, c_l, c_r);
528 ctx->ts[stopCount] = t_l;
529 add_const_color(ctx, stopCount++, c_l);
531 ctx->stopCount = stopCount;
532 p->append(SkRasterPipeline::gradient, ctx);
536 if (!premulGrad && !this->colorsAreOpaque()) {
537 p->append(SkRasterPipeline::premul);
544 bool SkGradientShaderBase::isOpaque() const {
545 return fColorsAreOpaque;
548 static unsigned rounded_divide(unsigned numer, unsigned denom) {
549 return (numer + (denom >> 1)) / denom;
552 bool SkGradientShaderBase::onAsLuminanceColor(SkColor* lum) const {
553 // we just compute an average color.
554 // possibly we could weight this based on the proportional width for each color
555 // assuming they are not evenly distributed in the fPos array.
559 const int n = fColorCount;
560 for (int i = 0; i < n; ++i) {
561 SkColor c = fOrigColors[i];
566 *lum = SkColorSetRGB(rounded_divide(r, n), rounded_divide(g, n), rounded_divide(b, n));
570 SkGradientShaderBase::GradientShaderBaseContext::GradientShaderBaseContext(
571 const SkGradientShaderBase& shader, const ContextRec& rec)
572 : INHERITED(shader, rec)
573 #ifdef SK_SUPPORT_LEGACY_GRADIENT_DITHERING
576 , fDither(rec.fPaint->isDither())
578 , fCache(shader.refCache(getPaintAlpha(), fDither))
580 const SkMatrix& inverse = this->getTotalInverse();
582 fDstToIndex.setConcat(shader.fPtsToUnit, inverse);
584 fDstToIndexProc = fDstToIndex.getMapXYProc();
585 fDstToIndexClass = (uint8_t)SkShader::Context::ComputeMatrixClass(fDstToIndex);
587 // now convert our colors in to PMColors
588 unsigned paintAlpha = this->getPaintAlpha();
590 fFlags = this->INHERITED::getFlags();
591 if (shader.fColorsAreOpaque && paintAlpha == 0xFF) {
592 fFlags |= kOpaqueAlpha_Flag;
596 bool SkGradientShaderBase::GradientShaderBaseContext::isValid() const {
597 return fDstToIndex.isFinite();
600 SkGradientShaderBase::GradientShaderCache::GradientShaderCache(
601 U8CPU alpha, bool dither, const SkGradientShaderBase& shader)
603 , fCacheDither(dither)
606 // Only initialize the cache in getCache32.
610 SkGradientShaderBase::GradientShaderCache::~GradientShaderCache() {}
613 * r,g,b used to be SkFixed, but on gcc (4.2.1 mac and 4.6.3 goobuntu) in
614 * release builds, we saw a compiler error where the 0xFF parameter in
615 * SkPackARGB32() was being totally ignored whenever it was called with
616 * a non-zero add (e.g. 0x8000).
618 * We found two work-arounds:
619 * 1. change r,g,b to unsigned (or just one of them)
620 * 2. change SkPackARGB32 to + its (a << SK_A32_SHIFT) value instead
623 * We chose #1 just because it was more localized.
624 * See http://code.google.com/p/skia/issues/detail?id=1113
626 * The type SkUFixed encapsulate this need for unsigned, but logically Fixed.
628 typedef uint32_t SkUFixed;
630 void SkGradientShaderBase::GradientShaderCache::Build32bitCache(
631 SkPMColor cache[], SkColor c0, SkColor c1,
632 int count, U8CPU paintAlpha, uint32_t gradFlags, bool dither) {
635 // need to apply paintAlpha to our two endpoints
636 uint32_t a0 = SkMulDiv255Round(SkColorGetA(c0), paintAlpha);
637 uint32_t a1 = SkMulDiv255Round(SkColorGetA(c1), paintAlpha);
640 const bool interpInPremul = SkToBool(gradFlags &
641 SkGradientShader::kInterpolateColorsInPremul_Flag);
643 uint32_t r0 = SkColorGetR(c0);
644 uint32_t g0 = SkColorGetG(c0);
645 uint32_t b0 = SkColorGetB(c0);
647 uint32_t r1 = SkColorGetR(c1);
648 uint32_t g1 = SkColorGetG(c1);
649 uint32_t b1 = SkColorGetB(c1);
651 if (interpInPremul) {
652 r0 = SkMulDiv255Round(r0, a0);
653 g0 = SkMulDiv255Round(g0, a0);
654 b0 = SkMulDiv255Round(b0, a0);
656 r1 = SkMulDiv255Round(r1, a1);
657 g1 = SkMulDiv255Round(g1, a1);
658 b1 = SkMulDiv255Round(b1, a1);
661 SkFixed da = SkIntToFixed(a1 - a0) / (count - 1);
662 SkFixed dr = SkIntToFixed(r1 - r0) / (count - 1);
663 SkFixed dg = SkIntToFixed(g1 - g0) / (count - 1);
664 SkFixed db = SkIntToFixed(b1 - b0) / (count - 1);
666 /* We pre-add 1/8 to avoid having to add this to our [0] value each time
667 in the loop. Without this, the bias for each would be
668 0x2000 0xA000 0xE000 0x6000
669 With this trick, we can add 0 for the first (no-op) and just adjust the
672 const SkUFixed bias0 = dither ? 0x2000 : 0x8000;
673 const SkUFixed bias1 = dither ? 0x8000 : 0;
674 const SkUFixed bias2 = dither ? 0xC000 : 0;
675 const SkUFixed bias3 = dither ? 0x4000 : 0;
677 SkUFixed a = SkIntToFixed(a0) + bias0;
678 SkUFixed r = SkIntToFixed(r0) + bias0;
679 SkUFixed g = SkIntToFixed(g0) + bias0;
680 SkUFixed b = SkIntToFixed(b0) + bias0;
683 * Our dither-cell (spatially) is
687 * [0] -> [-1/8 ... 1/8 ) values near 0
688 * [1] -> [ 1/8 ... 3/8 ) values near 1/4
689 * [2] -> [ 3/8 ... 5/8 ) values near 1/2
690 * [3] -> [ 5/8 ... 7/8 ) values near 3/4
693 if (0xFF == a0 && 0 == da) {
695 cache[kCache32Count*0] = SkPackARGB32(0xFF, (r + 0 ) >> 16,
698 cache[kCache32Count*1] = SkPackARGB32(0xFF, (r + bias1) >> 16,
701 cache[kCache32Count*2] = SkPackARGB32(0xFF, (r + bias2) >> 16,
704 cache[kCache32Count*3] = SkPackARGB32(0xFF, (r + bias3) >> 16,
711 } while (--count != 0);
712 } else if (interpInPremul) {
714 cache[kCache32Count*0] = SkPackARGB32((a + 0 ) >> 16,
718 cache[kCache32Count*1] = SkPackARGB32((a + bias1) >> 16,
722 cache[kCache32Count*2] = SkPackARGB32((a + bias2) >> 16,
726 cache[kCache32Count*3] = SkPackARGB32((a + bias3) >> 16,
735 } while (--count != 0);
736 } else { // interpolate in unpreml space
738 cache[kCache32Count*0] = SkPremultiplyARGBInline((a + 0 ) >> 16,
742 cache[kCache32Count*1] = SkPremultiplyARGBInline((a + bias1) >> 16,
746 cache[kCache32Count*2] = SkPremultiplyARGBInline((a + bias2) >> 16,
750 cache[kCache32Count*3] = SkPremultiplyARGBInline((a + bias3) >> 16,
759 } while (--count != 0);
763 static inline int SkFixedToFFFF(SkFixed x) {
764 SkASSERT((unsigned)x <= SK_Fixed1);
765 return x - (x >> 16);
768 const SkPMColor* SkGradientShaderBase::GradientShaderCache::getCache32() {
769 fCache32InitOnce(SkGradientShaderBase::GradientShaderCache::initCache32, this);
774 void SkGradientShaderBase::GradientShaderCache::initCache32(GradientShaderCache* cache) {
775 const int kNumberOfDitherRows = 4;
776 const SkImageInfo info = SkImageInfo::MakeN32Premul(kCache32Count, kNumberOfDitherRows);
778 SkASSERT(nullptr == cache->fCache32PixelRef);
779 cache->fCache32PixelRef = SkMallocPixelRef::MakeAllocate(info, 0, nullptr);
780 cache->fCache32 = (SkPMColor*)cache->fCache32PixelRef->pixels();
781 if (cache->fShader.fColorCount == 2) {
782 Build32bitCache(cache->fCache32, cache->fShader.fOrigColors[0],
783 cache->fShader.fOrigColors[1], kCache32Count, cache->fCacheAlpha,
784 cache->fShader.fGradFlags, cache->fCacheDither);
786 Rec* rec = cache->fShader.fRecs;
788 for (int i = 1; i < cache->fShader.fColorCount; i++) {
789 int nextIndex = SkFixedToFFFF(rec[i].fPos) >> kCache32Shift;
790 SkASSERT(nextIndex < kCache32Count);
792 if (nextIndex > prevIndex)
793 Build32bitCache(cache->fCache32 + prevIndex, cache->fShader.fOrigColors[i-1],
794 cache->fShader.fOrigColors[i], nextIndex - prevIndex + 1,
795 cache->fCacheAlpha, cache->fShader.fGradFlags, cache->fCacheDither);
796 prevIndex = nextIndex;
801 void SkGradientShaderBase::initLinearBitmap(SkBitmap* bitmap) const {
802 const bool interpInPremul = SkToBool(fGradFlags &
803 SkGradientShader::kInterpolateColorsInPremul_Flag);
804 SkHalf* pixelsF16 = reinterpret_cast<SkHalf*>(bitmap->getPixels());
805 uint32_t* pixelsS32 = reinterpret_cast<uint32_t*>(bitmap->getPixels());
807 typedef std::function<void(const Sk4f&, int)> pixelWriteFn_t;
809 pixelWriteFn_t writeF16Pixel = [&](const Sk4f& x, int index) {
810 Sk4h c = SkFloatToHalf_finite_ftz(x);
811 pixelsF16[4*index+0] = c[0];
812 pixelsF16[4*index+1] = c[1];
813 pixelsF16[4*index+2] = c[2];
814 pixelsF16[4*index+3] = c[3];
816 pixelWriteFn_t writeS32Pixel = [&](const Sk4f& c, int index) {
817 pixelsS32[index] = Sk4f_toS32(c);
820 pixelWriteFn_t writeSizedPixel =
821 (kRGBA_F16_SkColorType == bitmap->colorType()) ? writeF16Pixel : writeS32Pixel;
822 pixelWriteFn_t writeUnpremulPixel = [&](const Sk4f& c, int index) {
823 writeSizedPixel(c * Sk4f(c[3], c[3], c[3], 1.0f), index);
826 pixelWriteFn_t writePixel = interpInPremul ? writeSizedPixel : writeUnpremulPixel;
829 for (int i = 1; i < fColorCount; i++) {
830 int nextIndex = (fColorCount == 2) ? (kCache32Count - 1)
831 : SkFixedToFFFF(fRecs[i].fPos) >> kCache32Shift;
832 SkASSERT(nextIndex < kCache32Count);
834 if (nextIndex > prevIndex) {
835 Sk4f c0 = Sk4f::Load(fOrigColors4f[i - 1].vec());
836 Sk4f c1 = Sk4f::Load(fOrigColors4f[i].vec());
837 if (interpInPremul) {
838 c0 = c0 * Sk4f(c0[3], c0[3], c0[3], 1.0f);
839 c1 = c1 * Sk4f(c1[3], c1[3], c1[3], 1.0f);
842 Sk4f step = Sk4f(1.0f / static_cast<float>(nextIndex - prevIndex));
843 Sk4f delta = (c1 - c0) * step;
845 for (int curIndex = prevIndex; curIndex <= nextIndex; ++curIndex) {
846 writePixel(c0, curIndex);
850 prevIndex = nextIndex;
852 SkASSERT(prevIndex == kCache32Count - 1);
856 * The gradient holds a cache for the most recent value of alpha. Successive
857 * callers with the same alpha value will share the same cache.
859 sk_sp<SkGradientShaderBase::GradientShaderCache> SkGradientShaderBase::refCache(U8CPU alpha,
861 SkAutoMutexAcquire ama(fCacheMutex);
862 if (!fCache || fCache->getAlpha() != alpha || fCache->getDither() != dither) {
863 fCache.reset(new GradientShaderCache(alpha, dither, *this));
865 // Increment the ref counter inside the mutex to ensure the returned pointer is still valid.
866 // Otherwise, the pointer may have been overwritten on a different thread before the object's
867 // ref count was incremented.
871 SK_DECLARE_STATIC_MUTEX(gGradientCacheMutex);
873 * Because our caller might rebuild the same (logically the same) gradient
874 * over and over, we'd like to return exactly the same "bitmap" if possible,
875 * allowing the client to utilize a cache of our bitmap (e.g. with a GPU).
876 * To do that, we maintain a private cache of built-bitmaps, based on our
877 * colors and positions. Note: we don't try to flatten the fMapper, so if one
878 * is present, we skip the cache for now.
880 void SkGradientShaderBase::getGradientTableBitmap(SkBitmap* bitmap,
881 GradientBitmapType bitmapType) const {
882 // our caller assumes no external alpha, so we ensure that our cache is built with 0xFF
883 sk_sp<GradientShaderCache> cache(this->refCache(0xFF, true));
885 // build our key: [numColors + colors[] + {positions[]} + flags + colorType ]
886 int count = 1 + fColorCount + 1 + 1;
887 if (fColorCount > 2) {
888 count += fColorCount - 1; // fRecs[].fPos
891 SkAutoSTMalloc<16, int32_t> storage(count);
892 int32_t* buffer = storage.get();
894 *buffer++ = fColorCount;
895 memcpy(buffer, fOrigColors, fColorCount * sizeof(SkColor));
896 buffer += fColorCount;
897 if (fColorCount > 2) {
898 for (int i = 1; i < fColorCount; i++) {
899 *buffer++ = fRecs[i].fPos;
902 *buffer++ = fGradFlags;
903 *buffer++ = static_cast<int32_t>(bitmapType);
904 SkASSERT(buffer - storage.get() == count);
906 ///////////////////////////////////
908 static SkGradientBitmapCache* gCache;
909 // each cache cost 1K or 2K of RAM, since each bitmap will be 1x256 at either 32bpp or 64bpp
910 static const int MAX_NUM_CACHED_GRADIENT_BITMAPS = 32;
911 SkAutoMutexAcquire ama(gGradientCacheMutex);
913 if (nullptr == gCache) {
914 gCache = new SkGradientBitmapCache(MAX_NUM_CACHED_GRADIENT_BITMAPS);
916 size_t size = count * sizeof(int32_t);
918 if (!gCache->find(storage.get(), size, bitmap)) {
919 if (GradientBitmapType::kLegacy == bitmapType) {
920 // force our cache32pixelref to be built
921 (void)cache->getCache32();
922 bitmap->setInfo(SkImageInfo::MakeN32Premul(kCache32Count, 1));
923 bitmap->setPixelRef(sk_ref_sp(cache->getCache32PixelRef()), 0, 0);
925 // For these cases we use the bitmap cache, but not the GradientShaderCache. So just
926 // allocate and populate the bitmap's data directly.
929 switch (bitmapType) {
930 case GradientBitmapType::kSRGB:
931 info = SkImageInfo::Make(kCache32Count, 1, kRGBA_8888_SkColorType,
933 SkColorSpace::MakeSRGB());
935 case GradientBitmapType::kHalfFloat:
936 info = SkImageInfo::Make(
937 kCache32Count, 1, kRGBA_F16_SkColorType, kPremul_SkAlphaType,
938 SkColorSpace::MakeSRGBLinear());
941 SkFAIL("Unexpected bitmap type");
944 bitmap->allocPixels(info);
945 this->initLinearBitmap(bitmap);
947 gCache->add(storage.get(), size, *bitmap);
951 void SkGradientShaderBase::commonAsAGradient(GradientInfo* info, bool flipGrad) const {
953 if (info->fColorCount >= fColorCount) {
956 SkAutoSTArray<8, SkColor> colorStorage;
957 SkAutoSTArray<8, Rec> recStorage;
958 if (flipGrad && (info->fColors || info->fColorOffsets)) {
959 colorStorage.reset(fColorCount);
960 recStorage.reset(fColorCount);
961 colorLoc = colorStorage.get();
962 recLoc = recStorage.get();
963 FlipGradientColors(colorLoc, recLoc, fOrigColors, fRecs, fColorCount);
965 colorLoc = fOrigColors;
969 memcpy(info->fColors, colorLoc, fColorCount * sizeof(SkColor));
971 if (info->fColorOffsets) {
972 if (fColorCount == 2) {
973 info->fColorOffsets[0] = 0;
974 info->fColorOffsets[1] = SK_Scalar1;
975 } else if (fColorCount > 2) {
976 for (int i = 0; i < fColorCount; ++i) {
977 info->fColorOffsets[i] = SkFixedToScalar(recLoc[i].fPos);
982 info->fColorCount = fColorCount;
983 info->fTileMode = fTileMode;
984 info->fGradientFlags = fGradFlags;
988 #ifndef SK_IGNORE_TO_STRING
989 void SkGradientShaderBase::toString(SkString* str) const {
991 str->appendf("%d colors: ", fColorCount);
993 for (int i = 0; i < fColorCount; ++i) {
994 str->appendHex(fOrigColors[i], 8);
995 if (i < fColorCount-1) {
1000 if (fColorCount > 2) {
1001 str->append(" points: (");
1002 for (int i = 0; i < fColorCount; ++i) {
1003 str->appendScalar(SkFixedToScalar(fRecs[i].fPos));
1004 if (i < fColorCount-1) {
1011 static const char* gTileModeName[SkShader::kTileModeCount] = {
1012 "clamp", "repeat", "mirror"
1016 str->append(gTileModeName[fTileMode]);
1018 this->INHERITED::toString(str);
1022 ///////////////////////////////////////////////////////////////////////////////
1023 ///////////////////////////////////////////////////////////////////////////////
1025 // Return true if these parameters are valid/legal/safe to construct a gradient
1027 static bool valid_grad(const SkColor4f colors[], const SkScalar pos[], int count,
1028 unsigned tileMode) {
1029 return nullptr != colors && count >= 1 && tileMode < (unsigned)SkShader::kTileModeCount;
1032 static void desc_init(SkGradientShaderBase::Descriptor* desc,
1033 const SkColor4f colors[], sk_sp<SkColorSpace> colorSpace,
1034 const SkScalar pos[], int colorCount,
1035 SkShader::TileMode mode, uint32_t flags, const SkMatrix* localMatrix) {
1036 SkASSERT(colorCount > 1);
1038 desc->fColors = colors;
1039 desc->fColorSpace = std::move(colorSpace);
1041 desc->fCount = colorCount;
1042 desc->fTileMode = mode;
1043 desc->fGradFlags = flags;
1044 desc->fLocalMatrix = localMatrix;
1047 // assumes colors is SkColor4f* and pos is SkScalar*
1048 #define EXPAND_1_COLOR(count) \
1052 tmp[0] = tmp[1] = colors[0]; \
1059 struct ColorStopOptimizer {
1060 ColorStopOptimizer(const SkColor4f* colors, const SkScalar* pos,
1061 int count, SkShader::TileMode mode)
1066 if (!pos || count != 3) {
1070 if (SkScalarNearlyEqual(pos[0], 0.0f) &&
1071 SkScalarNearlyEqual(pos[1], 0.0f) &&
1072 SkScalarNearlyEqual(pos[2], 1.0f)) {
1074 if (SkShader::kRepeat_TileMode == mode ||
1075 SkShader::kMirror_TileMode == mode ||
1076 colors[0] == colors[1]) {
1078 // Ignore the leftmost color/pos.
1083 } else if (SkScalarNearlyEqual(pos[0], 0.0f) &&
1084 SkScalarNearlyEqual(pos[1], 1.0f) &&
1085 SkScalarNearlyEqual(pos[2], 1.0f)) {
1087 if (SkShader::kRepeat_TileMode == mode ||
1088 SkShader::kMirror_TileMode == mode ||
1089 colors[1] == colors[2]) {
1091 // Ignore the rightmost color/pos.
1097 const SkColor4f* fColors;
1098 const SkScalar* fPos;
1102 struct ColorConverter {
1103 ColorConverter(const SkColor* colors, int count) {
1104 for (int i = 0; i < count; ++i) {
1105 fColors4f.push_back(SkColor4f::FromColor(colors[i]));
1109 SkSTArray<2, SkColor4f, true> fColors4f;
1112 sk_sp<SkShader> SkGradientShader::MakeLinear(const SkPoint pts[2],
1113 const SkColor colors[],
1114 const SkScalar pos[], int colorCount,
1115 SkShader::TileMode mode,
1117 const SkMatrix* localMatrix) {
1118 ColorConverter converter(colors, colorCount);
1119 return MakeLinear(pts, converter.fColors4f.begin(), nullptr, pos, colorCount, mode, flags,
1123 sk_sp<SkShader> SkGradientShader::MakeLinear(const SkPoint pts[2],
1124 const SkColor4f colors[],
1125 sk_sp<SkColorSpace> colorSpace,
1126 const SkScalar pos[], int colorCount,
1127 SkShader::TileMode mode,
1129 const SkMatrix* localMatrix) {
1130 if (!pts || !SkScalarIsFinite((pts[1] - pts[0]).length())) {
1133 if (!valid_grad(colors, pos, colorCount, mode)) {
1136 if (1 == colorCount) {
1137 return SkShader::MakeColorShader(colors[0], std::move(colorSpace));
1139 if (localMatrix && !localMatrix->invert(nullptr)) {
1143 ColorStopOptimizer opt(colors, pos, colorCount, mode);
1145 SkGradientShaderBase::Descriptor desc;
1146 desc_init(&desc, opt.fColors, std::move(colorSpace), opt.fPos, opt.fCount, mode, flags,
1148 return sk_make_sp<SkLinearGradient>(pts, desc);
1151 sk_sp<SkShader> SkGradientShader::MakeRadial(const SkPoint& center, SkScalar radius,
1152 const SkColor colors[],
1153 const SkScalar pos[], int colorCount,
1154 SkShader::TileMode mode,
1156 const SkMatrix* localMatrix) {
1157 ColorConverter converter(colors, colorCount);
1158 return MakeRadial(center, radius, converter.fColors4f.begin(), nullptr, pos, colorCount, mode,
1159 flags, localMatrix);
1162 sk_sp<SkShader> SkGradientShader::MakeRadial(const SkPoint& center, SkScalar radius,
1163 const SkColor4f colors[],
1164 sk_sp<SkColorSpace> colorSpace,
1165 const SkScalar pos[], int colorCount,
1166 SkShader::TileMode mode,
1168 const SkMatrix* localMatrix) {
1172 if (!valid_grad(colors, pos, colorCount, mode)) {
1175 if (1 == colorCount) {
1176 return SkShader::MakeColorShader(colors[0], std::move(colorSpace));
1178 if (localMatrix && !localMatrix->invert(nullptr)) {
1182 ColorStopOptimizer opt(colors, pos, colorCount, mode);
1184 SkGradientShaderBase::Descriptor desc;
1185 desc_init(&desc, opt.fColors, std::move(colorSpace), opt.fPos, opt.fCount, mode, flags,
1187 return sk_make_sp<SkRadialGradient>(center, radius, desc);
1190 sk_sp<SkShader> SkGradientShader::MakeTwoPointConical(const SkPoint& start,
1191 SkScalar startRadius,
1194 const SkColor colors[],
1195 const SkScalar pos[],
1197 SkShader::TileMode mode,
1199 const SkMatrix* localMatrix) {
1200 ColorConverter converter(colors, colorCount);
1201 return MakeTwoPointConical(start, startRadius, end, endRadius, converter.fColors4f.begin(),
1202 nullptr, pos, colorCount, mode, flags, localMatrix);
1205 sk_sp<SkShader> SkGradientShader::MakeTwoPointConical(const SkPoint& start,
1206 SkScalar startRadius,
1209 const SkColor4f colors[],
1210 sk_sp<SkColorSpace> colorSpace,
1211 const SkScalar pos[],
1213 SkShader::TileMode mode,
1215 const SkMatrix* localMatrix) {
1216 if (startRadius < 0 || endRadius < 0) {
1219 if (!valid_grad(colors, pos, colorCount, mode)) {
1222 if (startRadius == endRadius) {
1223 if (start == end || startRadius == 0) {
1224 return SkShader::MakeEmptyShader();
1227 if (localMatrix && !localMatrix->invert(nullptr)) {
1230 EXPAND_1_COLOR(colorCount);
1232 ColorStopOptimizer opt(colors, pos, colorCount, mode);
1234 bool flipGradient = startRadius > endRadius;
1236 SkGradientShaderBase::Descriptor desc;
1238 if (!flipGradient) {
1239 desc_init(&desc, opt.fColors, std::move(colorSpace), opt.fPos, opt.fCount, mode, flags,
1241 return sk_make_sp<SkTwoPointConicalGradient>(start, startRadius, end, endRadius,
1242 flipGradient, desc);
1244 SkAutoSTArray<8, SkColor4f> colorsNew(opt.fCount);
1245 SkAutoSTArray<8, SkScalar> posNew(opt.fCount);
1246 for (int i = 0; i < opt.fCount; ++i) {
1247 colorsNew[i] = opt.fColors[opt.fCount - i - 1];
1251 for (int i = 0; i < opt.fCount; ++i) {
1252 posNew[i] = 1 - opt.fPos[opt.fCount - i - 1];
1254 desc_init(&desc, colorsNew.get(), std::move(colorSpace), posNew.get(), opt.fCount, mode,
1255 flags, localMatrix);
1257 desc_init(&desc, colorsNew.get(), std::move(colorSpace), nullptr, opt.fCount, mode,
1258 flags, localMatrix);
1261 return sk_make_sp<SkTwoPointConicalGradient>(end, endRadius, start, startRadius,
1262 flipGradient, desc);
1266 sk_sp<SkShader> SkGradientShader::MakeSweep(SkScalar cx, SkScalar cy,
1267 const SkColor colors[],
1268 const SkScalar pos[],
1271 const SkMatrix* localMatrix) {
1272 ColorConverter converter(colors, colorCount);
1273 return MakeSweep(cx, cy, converter.fColors4f.begin(), nullptr, pos, colorCount, flags,
1277 sk_sp<SkShader> SkGradientShader::MakeSweep(SkScalar cx, SkScalar cy,
1278 const SkColor4f colors[],
1279 sk_sp<SkColorSpace> colorSpace,
1280 const SkScalar pos[],
1283 const SkMatrix* localMatrix) {
1284 if (!valid_grad(colors, pos, colorCount, SkShader::kClamp_TileMode)) {
1287 if (1 == colorCount) {
1288 return SkShader::MakeColorShader(colors[0], std::move(colorSpace));
1290 if (localMatrix && !localMatrix->invert(nullptr)) {
1294 auto mode = SkShader::kClamp_TileMode;
1296 ColorStopOptimizer opt(colors, pos, colorCount, mode);
1298 SkGradientShaderBase::Descriptor desc;
1299 desc_init(&desc, opt.fColors, std::move(colorSpace), opt.fPos, opt.fCount, mode, flags,
1301 return sk_make_sp<SkSweepGradient>(cx, cy, desc);
1304 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkGradientShader)
1305 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLinearGradient)
1306 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkRadialGradient)
1307 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSweepGradient)
1308 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTwoPointConicalGradient)
1309 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
1311 ///////////////////////////////////////////////////////////////////////////////
1315 #include "GrContext.h"
1316 #include "GrShaderCaps.h"
1317 #include "GrTextureStripAtlas.h"
1318 #include "gl/GrGLContext.h"
1319 #include "glsl/GrGLSLColorSpaceXformHelper.h"
1320 #include "glsl/GrGLSLFragmentShaderBuilder.h"
1321 #include "glsl/GrGLSLProgramDataManager.h"
1322 #include "glsl/GrGLSLUniformHandler.h"
1325 static inline bool close_to_one_half(const SkFixed& val) {
1326 return SkScalarNearlyEqual(SkFixedToScalar(val), SK_ScalarHalf);
1329 static inline int color_type_to_color_count(GrGradientEffect::ColorType colorType) {
1330 switch (colorType) {
1331 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1332 case GrGradientEffect::kSingleHardStop_ColorType:
1334 case GrGradientEffect::kHardStopLeftEdged_ColorType:
1335 case GrGradientEffect::kHardStopRightEdged_ColorType:
1338 case GrGradientEffect::kTwo_ColorType:
1340 case GrGradientEffect::kThree_ColorType:
1342 case GrGradientEffect::kTexture_ColorType:
1346 SkDEBUGFAIL("Unhandled ColorType in color_type_to_color_count()");
1350 GrGradientEffect::ColorType GrGradientEffect::determineColorType(
1351 const SkGradientShaderBase& shader) {
1352 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1353 if (shader.fOrigPos) {
1354 if (4 == shader.fColorCount) {
1355 if (SkScalarNearlyEqual(shader.fOrigPos[0], 0.0f) &&
1356 SkScalarNearlyEqual(shader.fOrigPos[1], shader.fOrigPos[2]) &&
1357 SkScalarNearlyEqual(shader.fOrigPos[3], 1.0f)) {
1359 return kSingleHardStop_ColorType;
1361 } else if (3 == shader.fColorCount) {
1362 if (SkScalarNearlyEqual(shader.fOrigPos[0], 0.0f) &&
1363 SkScalarNearlyEqual(shader.fOrigPos[1], 0.0f) &&
1364 SkScalarNearlyEqual(shader.fOrigPos[2], 1.0f)) {
1366 return kHardStopLeftEdged_ColorType;
1367 } else if (SkScalarNearlyEqual(shader.fOrigPos[0], 0.0f) &&
1368 SkScalarNearlyEqual(shader.fOrigPos[1], 1.0f) &&
1369 SkScalarNearlyEqual(shader.fOrigPos[2], 1.0f)) {
1371 return kHardStopRightEdged_ColorType;
1377 if (SkShader::kClamp_TileMode == shader.getTileMode()) {
1378 if (2 == shader.fColorCount) {
1379 return kTwo_ColorType;
1380 } else if (3 == shader.fColorCount &&
1381 close_to_one_half(shader.getRecs()[1].fPos)) {
1382 return kThree_ColorType;
1386 return kTexture_ColorType;
1389 void GrGradientEffect::GLSLProcessor::emitUniforms(GrGLSLUniformHandler* uniformHandler,
1390 const GrGradientEffect& ge) {
1391 if (int colorCount = color_type_to_color_count(ge.getColorType())) {
1392 fColorsUni = uniformHandler->addUniformArray(kFragment_GrShaderFlag,
1394 kDefault_GrSLPrecision,
1397 if (ge.fColorType == kSingleHardStop_ColorType) {
1398 fHardStopT = uniformHandler->addUniform(kFragment_GrShaderFlag, kFloat_GrSLType,
1399 kDefault_GrSLPrecision, "HardStopT");
1402 fFSYUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
1403 kFloat_GrSLType, kDefault_GrSLPrecision,
1404 "GradientYCoordFS");
1408 static inline void set_after_interp_color_uni_array(
1409 const GrGLSLProgramDataManager& pdman,
1410 const GrGLSLProgramDataManager::UniformHandle uni,
1411 const SkTDArray<SkColor4f>& colors,
1412 const GrColorSpaceXform* colorSpaceXform) {
1413 int count = colors.count();
1414 if (colorSpaceXform) {
1415 constexpr int kSmallCount = 10;
1416 SkAutoSTArray<4 * kSmallCount, float> vals(4 * count);
1418 for (int i = 0; i < count; i++) {
1419 colorSpaceXform->srcToDst().mapScalars(colors[i].vec(), &vals[4 * i]);
1422 pdman.set4fv(uni, count, vals.get());
1424 pdman.set4fv(uni, count, (float*)&colors[0]);
1428 static inline void set_before_interp_color_uni_array(
1429 const GrGLSLProgramDataManager& pdman,
1430 const GrGLSLProgramDataManager::UniformHandle uni,
1431 const SkTDArray<SkColor4f>& colors,
1432 const GrColorSpaceXform* colorSpaceXform) {
1433 int count = colors.count();
1434 constexpr int kSmallCount = 10;
1435 SkAutoSTArray<4 * kSmallCount, float> vals(4 * count);
1437 for (int i = 0; i < count; i++) {
1438 float a = colors[i].fA;
1439 vals[4 * i + 0] = colors[i].fR * a;
1440 vals[4 * i + 1] = colors[i].fG * a;
1441 vals[4 * i + 2] = colors[i].fB * a;
1442 vals[4 * i + 3] = a;
1445 if (colorSpaceXform) {
1446 for (int i = 0; i < count; i++) {
1447 colorSpaceXform->srcToDst().mapScalars(&vals[4 * i]);
1451 pdman.set4fv(uni, count, vals.get());
1454 static inline void set_after_interp_color_uni_array(const GrGLSLProgramDataManager& pdman,
1455 const GrGLSLProgramDataManager::UniformHandle uni,
1456 const SkTDArray<SkColor>& colors) {
1457 int count = colors.count();
1458 constexpr int kSmallCount = 10;
1460 SkAutoSTArray<4*kSmallCount, float> vals(4*count);
1462 for (int i = 0; i < colors.count(); i++) {
1464 vals[4*i + 0] = SkColorGetR(colors[i]) / 255.f;
1465 vals[4*i + 1] = SkColorGetG(colors[i]) / 255.f;
1466 vals[4*i + 2] = SkColorGetB(colors[i]) / 255.f;
1467 vals[4*i + 3] = SkColorGetA(colors[i]) / 255.f;
1470 pdman.set4fv(uni, colors.count(), vals.get());
1473 static inline void set_before_interp_color_uni_array(const GrGLSLProgramDataManager& pdman,
1474 const GrGLSLProgramDataManager::UniformHandle uni,
1475 const SkTDArray<SkColor>& colors) {
1476 int count = colors.count();
1477 constexpr int kSmallCount = 10;
1479 SkAutoSTArray<4*kSmallCount, float> vals(4*count);
1481 for (int i = 0; i < count; i++) {
1482 float a = SkColorGetA(colors[i]) / 255.f;
1483 float aDiv255 = a / 255.f;
1486 vals[4*i + 0] = SkColorGetR(colors[i]) * aDiv255;
1487 vals[4*i + 1] = SkColorGetG(colors[i]) * aDiv255;
1488 vals[4*i + 2] = SkColorGetB(colors[i]) * aDiv255;
1492 pdman.set4fv(uni, count, vals.get());
1495 void GrGradientEffect::GLSLProcessor::onSetData(const GrGLSLProgramDataManager& pdman,
1496 const GrFragmentProcessor& processor) {
1497 const GrGradientEffect& e = processor.cast<GrGradientEffect>();
1499 switch (e.getColorType()) {
1500 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1501 case GrGradientEffect::kSingleHardStop_ColorType:
1502 pdman.set1f(fHardStopT, e.fPositions[1]);
1504 case GrGradientEffect::kHardStopLeftEdged_ColorType:
1505 case GrGradientEffect::kHardStopRightEdged_ColorType:
1507 case GrGradientEffect::kTwo_ColorType:
1508 case GrGradientEffect::kThree_ColorType: {
1509 if (e.fColors4f.count() > 0) {
1510 // Gamma-correct / color-space aware
1511 if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) {
1512 set_before_interp_color_uni_array(pdman, fColorsUni, e.fColors4f,
1513 e.fColorSpaceXform.get());
1515 set_after_interp_color_uni_array(pdman, fColorsUni, e.fColors4f,
1516 e.fColorSpaceXform.get());
1519 // Legacy mode. Would be nice if we had converted the 8-bit colors to float earlier
1520 if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) {
1521 set_before_interp_color_uni_array(pdman, fColorsUni, e.fColors);
1523 set_after_interp_color_uni_array(pdman, fColorsUni, e.fColors);
1530 case GrGradientEffect::kTexture_ColorType: {
1531 SkScalar yCoord = e.getYCoord();
1532 if (yCoord != fCachedYCoord) {
1533 pdman.set1f(fFSYUni, yCoord);
1534 fCachedYCoord = yCoord;
1536 if (SkToBool(e.fColorSpaceXform)) {
1537 fColorSpaceHelper.setData(pdman, e.fColorSpaceXform.get());
1544 uint32_t GrGradientEffect::GLSLProcessor::GenBaseGradientKey(const GrProcessor& processor) {
1545 const GrGradientEffect& e = processor.cast<GrGradientEffect>();
1549 if (GrGradientEffect::kBeforeInterp_PremulType == e.getPremulType()) {
1550 key |= kPremulBeforeInterpKey;
1553 if (GrGradientEffect::kTwo_ColorType == e.getColorType()) {
1554 key |= kTwoColorKey;
1555 } else if (GrGradientEffect::kThree_ColorType == e.getColorType()) {
1556 key |= kThreeColorKey;
1558 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1559 else if (GrGradientEffect::kSingleHardStop_ColorType == e.getColorType()) {
1560 key |= kHardStopCenteredKey;
1561 } else if (GrGradientEffect::kHardStopLeftEdged_ColorType == e.getColorType()) {
1562 key |= kHardStopZeroZeroOneKey;
1563 } else if (GrGradientEffect::kHardStopRightEdged_ColorType == e.getColorType()) {
1564 key |= kHardStopZeroOneOneKey;
1567 if (SkShader::TileMode::kClamp_TileMode == e.fTileMode) {
1568 key |= kClampTileMode;
1569 } else if (SkShader::TileMode::kRepeat_TileMode == e.fTileMode) {
1570 key |= kRepeatTileMode;
1572 key |= kMirrorTileMode;
1576 key |= GrColorSpaceXform::XformKey(e.fColorSpaceXform.get()) << kReservedBits;
1581 void GrGradientEffect::GLSLProcessor::emitColor(GrGLSLFPFragmentBuilder* fragBuilder,
1582 GrGLSLUniformHandler* uniformHandler,
1583 const GrShaderCaps* shaderCaps,
1584 const GrGradientEffect& ge,
1585 const char* gradientTValue,
1586 const char* outputColor,
1587 const char* inputColor,
1588 const TextureSamplers& texSamplers) {
1589 switch (ge.getColorType()) {
1590 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1591 case kSingleHardStop_ColorType: {
1592 const char* t = gradientTValue;
1593 const char* colors = uniformHandler->getUniformCStr(fColorsUni);
1594 const char* stopT = uniformHandler->getUniformCStr(fHardStopT);
1596 fragBuilder->codeAppendf("float clamp_t = clamp(%s, 0.0, 1.0);", t);
1598 // Account for tile mode
1599 if (SkShader::kRepeat_TileMode == ge.fTileMode) {
1600 fragBuilder->codeAppendf("clamp_t = fract(%s);", t);
1601 } else if (SkShader::kMirror_TileMode == ge.fTileMode) {
1602 fragBuilder->codeAppendf("if (%s < 0.0 || %s > 1.0) {", t, t);
1603 fragBuilder->codeAppendf(" if (mod(floor(%s), 2.0) == 0.0) {", t);
1604 fragBuilder->codeAppendf(" clamp_t = fract(%s);", t);
1605 fragBuilder->codeAppendf(" } else {");
1606 fragBuilder->codeAppendf(" clamp_t = 1.0 - fract(%s);", t);
1607 fragBuilder->codeAppendf(" }");
1608 fragBuilder->codeAppendf("}");
1612 fragBuilder->codeAppend ("vec4 start, end;");
1613 fragBuilder->codeAppend ("float relative_t;");
1614 fragBuilder->codeAppendf("if (clamp_t < %s) {", stopT);
1615 fragBuilder->codeAppendf(" start = %s[0];", colors);
1616 fragBuilder->codeAppendf(" end = %s[1];", colors);
1617 fragBuilder->codeAppendf(" relative_t = clamp_t / %s;", stopT);
1618 fragBuilder->codeAppend ("} else {");
1619 fragBuilder->codeAppendf(" start = %s[2];", colors);
1620 fragBuilder->codeAppendf(" end = %s[3];", colors);
1621 fragBuilder->codeAppendf(" relative_t = (clamp_t - %s) / (1 - %s);", stopT, stopT);
1622 fragBuilder->codeAppend ("}");
1623 fragBuilder->codeAppend ("vec4 colorTemp = mix(start, end, relative_t);");
1625 if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) {
1626 fragBuilder->codeAppend("colorTemp.rgb *= colorTemp.a;");
1628 if (ge.fColorSpaceXform) {
1629 fragBuilder->codeAppend("colorTemp.rgb = clamp(colorTemp.rgb, 0, colorTemp.a);");
1631 fragBuilder->codeAppendf("%s = %s * colorTemp;", outputColor, inputColor);
1636 case kHardStopLeftEdged_ColorType: {
1637 const char* t = gradientTValue;
1638 const char* colors = uniformHandler->getUniformCStr(fColorsUni);
1640 fragBuilder->codeAppendf("float clamp_t = clamp(%s, 0.0, 1.0);", t);
1642 // Account for tile mode
1643 if (SkShader::kRepeat_TileMode == ge.fTileMode) {
1644 fragBuilder->codeAppendf("clamp_t = fract(%s);", t);
1645 } else if (SkShader::kMirror_TileMode == ge.fTileMode) {
1646 fragBuilder->codeAppendf("if (%s < 0.0 || %s > 1.0) {", t, t);
1647 fragBuilder->codeAppendf(" if (mod(floor(%s), 2.0) == 0.0) {", t);
1648 fragBuilder->codeAppendf(" clamp_t = fract(%s);", t);
1649 fragBuilder->codeAppendf(" } else {");
1650 fragBuilder->codeAppendf(" clamp_t = 1.0 - fract(%s);", t);
1651 fragBuilder->codeAppendf(" }");
1652 fragBuilder->codeAppendf("}");
1655 fragBuilder->codeAppendf("vec4 colorTemp = mix(%s[1], %s[2], clamp_t);", colors,
1657 if (SkShader::kClamp_TileMode == ge.fTileMode) {
1658 fragBuilder->codeAppendf("if (%s < 0.0) {", t);
1659 fragBuilder->codeAppendf(" colorTemp = %s[0];", colors);
1660 fragBuilder->codeAppendf("}");
1663 if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) {
1664 fragBuilder->codeAppend("colorTemp.rgb *= colorTemp.a;");
1666 if (ge.fColorSpaceXform) {
1667 fragBuilder->codeAppend("colorTemp.rgb = clamp(colorTemp.rgb, 0, colorTemp.a);");
1669 fragBuilder->codeAppendf("%s = %s * colorTemp;", outputColor, inputColor);
1674 case kHardStopRightEdged_ColorType: {
1675 const char* t = gradientTValue;
1676 const char* colors = uniformHandler->getUniformCStr(fColorsUni);
1678 fragBuilder->codeAppendf("float clamp_t = clamp(%s, 0.0, 1.0);", t);
1680 // Account for tile mode
1681 if (SkShader::kRepeat_TileMode == ge.fTileMode) {
1682 fragBuilder->codeAppendf("clamp_t = fract(%s);", t);
1683 } else if (SkShader::kMirror_TileMode == ge.fTileMode) {
1684 fragBuilder->codeAppendf("if (%s < 0.0 || %s > 1.0) {", t, t);
1685 fragBuilder->codeAppendf(" if (mod(floor(%s), 2.0) == 0.0) {", t);
1686 fragBuilder->codeAppendf(" clamp_t = fract(%s);", t);
1687 fragBuilder->codeAppendf(" } else {");
1688 fragBuilder->codeAppendf(" clamp_t = 1.0 - fract(%s);", t);
1689 fragBuilder->codeAppendf(" }");
1690 fragBuilder->codeAppendf("}");
1693 fragBuilder->codeAppendf("vec4 colorTemp = mix(%s[0], %s[1], clamp_t);", colors,
1695 if (SkShader::kClamp_TileMode == ge.fTileMode) {
1696 fragBuilder->codeAppendf("if (%s > 1.0) {", t);
1697 fragBuilder->codeAppendf(" colorTemp = %s[2];", colors);
1698 fragBuilder->codeAppendf("}");
1701 if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) {
1702 fragBuilder->codeAppend("colorTemp.rgb *= colorTemp.a;");
1704 if (ge.fColorSpaceXform) {
1705 fragBuilder->codeAppend("colorTemp.rgb = clamp(colorTemp.rgb, 0, colorTemp.a);");
1707 fragBuilder->codeAppendf("%s = %s * colorTemp;", outputColor, inputColor);
1713 case kTwo_ColorType: {
1714 const char* t = gradientTValue;
1715 const char* colors = uniformHandler->getUniformCStr(fColorsUni);
1717 fragBuilder->codeAppendf("vec4 colorTemp = mix(%s[0], %s[1], clamp(%s, 0.0, 1.0));",
1720 // We could skip this step if both colors are known to be opaque. Two
1722 // The gradient SkShader reporting opaque is more restrictive than necessary in the two
1723 // pt case. Make sure the key reflects this optimization (and note that it can use the
1724 // same shader as thekBeforeIterp case). This same optimization applies to the 3 color
1726 if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) {
1727 fragBuilder->codeAppend("colorTemp.rgb *= colorTemp.a;");
1729 if (ge.fColorSpaceXform) {
1730 fragBuilder->codeAppend("colorTemp.rgb = clamp(colorTemp.rgb, 0, colorTemp.a);");
1733 fragBuilder->codeAppendf("%s = %s * colorTemp;", outputColor, inputColor);
1738 case kThree_ColorType: {
1739 const char* t = gradientTValue;
1740 const char* colors = uniformHandler->getUniformCStr(fColorsUni);
1742 fragBuilder->codeAppendf("float oneMinus2t = 1.0 - (2.0 * %s);", t);
1743 fragBuilder->codeAppendf("vec4 colorTemp = clamp(oneMinus2t, 0.0, 1.0) * %s[0];",
1745 if (!shaderCaps->canUseMinAndAbsTogether()) {
1746 // The Tegra3 compiler will sometimes never return if we have
1747 // min(abs(oneMinus2t), 1.0), or do the abs first in a separate expression.
1748 fragBuilder->codeAppendf("float minAbs = abs(oneMinus2t);");
1749 fragBuilder->codeAppendf("minAbs = minAbs > 1.0 ? 1.0 : minAbs;");
1750 fragBuilder->codeAppendf("colorTemp += (1.0 - minAbs) * %s[1];", colors);
1752 fragBuilder->codeAppendf("colorTemp += (1.0 - min(abs(oneMinus2t), 1.0)) * %s[1];",
1755 fragBuilder->codeAppendf("colorTemp += clamp(-oneMinus2t, 0.0, 1.0) * %s[2];", colors);
1757 if (GrGradientEffect::kAfterInterp_PremulType == ge.getPremulType()) {
1758 fragBuilder->codeAppend("colorTemp.rgb *= colorTemp.a;");
1760 if (ge.fColorSpaceXform) {
1761 fragBuilder->codeAppend("colorTemp.rgb = clamp(colorTemp.rgb, 0, colorTemp.a);");
1764 fragBuilder->codeAppendf("%s = %s * colorTemp;", outputColor, inputColor);
1769 case kTexture_ColorType: {
1770 fColorSpaceHelper.emitCode(uniformHandler, ge.fColorSpaceXform.get());
1772 const char* fsyuni = uniformHandler->getUniformCStr(fFSYUni);
1774 fragBuilder->codeAppendf("vec2 coord = vec2(%s, %s);", gradientTValue, fsyuni);
1775 fragBuilder->codeAppendf("%s = ", outputColor);
1776 fragBuilder->appendTextureLookupAndModulate(inputColor, texSamplers[0], "coord",
1777 kVec2f_GrSLType, &fColorSpaceHelper);
1778 fragBuilder->codeAppend(";");
1785 /////////////////////////////////////////////////////////////////////
1787 inline GrFragmentProcessor::OptimizationFlags GrGradientEffect::OptFlags(bool isOpaque) {
1789 ? kPreservesOpaqueInput_OptimizationFlag |
1790 kCompatibleWithCoverageAsAlpha_OptimizationFlag
1791 : kCompatibleWithCoverageAsAlpha_OptimizationFlag;
1794 GrGradientEffect::GrGradientEffect(const CreateArgs& args, bool isOpaque)
1795 : INHERITED(OptFlags(isOpaque)) {
1796 const SkGradientShaderBase& shader(*args.fShader);
1798 fIsOpaque = shader.isOpaque();
1800 fColorType = this->determineColorType(shader);
1801 fColorSpaceXform = std::move(args.fColorSpaceXform);
1803 if (kTexture_ColorType != fColorType) {
1804 SkASSERT(shader.fOrigColors && shader.fOrigColors4f);
1805 if (args.fGammaCorrect) {
1806 fColors4f = SkTDArray<SkColor4f>(shader.fOrigColors4f, shader.fColorCount);
1808 fColors = SkTDArray<SkColor>(shader.fOrigColors, shader.fColorCount);
1811 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1812 if (shader.fOrigPos) {
1813 fPositions = SkTDArray<SkScalar>(shader.fOrigPos, shader.fColorCount);
1818 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1819 fTileMode = args.fTileMode;
1822 switch (fColorType) {
1823 // The two and three color specializations do not currently support tiling.
1824 case kTwo_ColorType:
1825 case kThree_ColorType:
1826 #if GR_GL_USE_ACCURATE_HARD_STOP_GRADIENTS
1827 case kHardStopLeftEdged_ColorType:
1828 case kHardStopRightEdged_ColorType:
1829 case kSingleHardStop_ColorType:
1833 if (SkGradientShader::kInterpolateColorsInPremul_Flag & shader.getGradFlags()) {
1834 fPremulType = kBeforeInterp_PremulType;
1836 fPremulType = kAfterInterp_PremulType;
1839 fCoordTransform.reset(*args.fMatrix);
1842 case kTexture_ColorType:
1843 // doesn't matter how this is set, just be consistent because it is part of the
1845 fPremulType = kBeforeInterp_PremulType;
1847 SkGradientShaderBase::GradientBitmapType bitmapType =
1848 SkGradientShaderBase::GradientBitmapType::kLegacy;
1849 if (args.fGammaCorrect) {
1850 // Try to use F16 if we can
1851 if (args.fContext->caps()->isConfigTexturable(kRGBA_half_GrPixelConfig)) {
1852 bitmapType = SkGradientShaderBase::GradientBitmapType::kHalfFloat;
1853 } else if (args.fContext->caps()->isConfigTexturable(kSRGBA_8888_GrPixelConfig)) {
1854 bitmapType = SkGradientShaderBase::GradientBitmapType::kSRGB;
1856 // This can happen, but only if someone explicitly creates an unsupported
1857 // (eg sRGB) surface. Just fall back to legacy behavior.
1862 shader.getGradientTableBitmap(&bitmap, bitmapType);
1863 SkASSERT(1 == bitmap.height() && SkIsPow2(bitmap.width()));
1866 GrTextureStripAtlas::Desc desc;
1867 desc.fWidth = bitmap.width();
1869 desc.fRowHeight = bitmap.height();
1870 desc.fContext = args.fContext;
1871 desc.fConfig = SkImageInfo2GrPixelConfig(bitmap.info(), *args.fContext->caps());
1872 fAtlas = GrTextureStripAtlas::GetAtlas(desc);
1875 // We always filter the gradient table. Each table is one row of a texture, always
1877 GrSamplerParams params;
1878 params.setFilterMode(GrSamplerParams::kBilerp_FilterMode);
1879 params.setTileModeX(args.fTileMode);
1881 fRow = fAtlas->lockRow(bitmap);
1883 fYCoord = fAtlas->getYOffset(fRow)+SK_ScalarHalf*fAtlas->getNormalizedTexelHeight();
1884 // This is 1/2 places where auto-normalization is disabled
1885 fCoordTransform.reset(args.fContext->resourceProvider(), *args.fMatrix,
1886 fAtlas->asTextureProxyRef().get(), false);
1887 fTextureSampler.reset(args.fContext->resourceProvider(),
1888 fAtlas->asTextureProxyRef(), params);
1890 // In this instance we know the params are:
1892 // and the proxy is:
1893 // exact fit, power of two in both dimensions
1894 // Only the x-tileMode is unknown. However, given all the other knowns we know
1895 // that GrMakeCachedBitmapProxy is sufficient (i.e., it won't need to be
1896 // extracted to a subset or mipmapped).
1897 sk_sp<GrTextureProxy> proxy = GrMakeCachedBitmapProxy(
1898 args.fContext->resourceProvider(),
1903 // This is 2/2 places where auto-normalization is disabled
1904 fCoordTransform.reset(args.fContext->resourceProvider(), *args.fMatrix,
1905 proxy.get(), false);
1906 fTextureSampler.reset(args.fContext->resourceProvider(),
1907 std::move(proxy), params);
1908 fYCoord = SK_ScalarHalf;
1911 this->addTextureSampler(&fTextureSampler);
1916 this->addCoordTransform(&fCoordTransform);
1919 GrGradientEffect::~GrGradientEffect() {
1920 if (this->useAtlas()) {
1921 fAtlas->unlockRow(fRow);
1925 bool GrGradientEffect::onIsEqual(const GrFragmentProcessor& processor) const {
1926 const GrGradientEffect& ge = processor.cast<GrGradientEffect>();
1928 if (this->fColorType != ge.getColorType()) {
1931 SkASSERT(this->useAtlas() == ge.useAtlas());
1932 if (kTexture_ColorType == fColorType) {
1933 if (fYCoord != ge.getYCoord()) {
1937 if (kSingleHardStop_ColorType == fColorType) {
1938 if (!SkScalarNearlyEqual(ge.fPositions[1], fPositions[1])) {
1942 if (this->getPremulType() != ge.getPremulType() ||
1943 this->fColors.count() != ge.fColors.count() ||
1944 this->fColors4f.count() != ge.fColors4f.count()) {
1948 for (int i = 0; i < this->fColors.count(); i++) {
1949 if (*this->getColors(i) != *ge.getColors(i)) {
1953 for (int i = 0; i < this->fColors4f.count(); i++) {
1954 if (*this->getColors4f(i) != *ge.getColors4f(i)) {
1959 return GrColorSpaceXform::Equals(this->fColorSpaceXform.get(), ge.fColorSpaceXform.get());
1963 GrGradientEffect::RandomGradientParams::RandomGradientParams(SkRandom* random) {
1964 // Set color count to min of 2 so that we don't trigger the const color optimization and make
1965 // a non-gradient processor.
1966 fColorCount = random->nextRangeU(2, kMaxRandomGradientColors);
1967 fUseColors4f = random->nextBool();
1969 // if one color, omit stops, otherwise randomly decide whether or not to
1970 if (fColorCount == 1 || (fColorCount >= 2 && random->nextBool())) {
1973 fStops = fStopStorage;
1976 // if using SkColor4f, attach a random (possibly null) color space (with linear gamma)
1978 fColorSpace = GrTest::TestColorSpace(random);
1980 SkASSERT(SkColorSpace_Base::Type::kXYZ == as_CSB(fColorSpace)->type());
1981 fColorSpace = static_cast<SkColorSpace_XYZ*>(fColorSpace.get())->makeLinearGamma();
1985 SkScalar stop = 0.f;
1986 for (int i = 0; i < fColorCount; ++i) {
1988 fColors4f[i].fR = random->nextUScalar1();
1989 fColors4f[i].fG = random->nextUScalar1();
1990 fColors4f[i].fB = random->nextUScalar1();
1991 fColors4f[i].fA = random->nextUScalar1();
1993 fColors[i] = random->nextU();
1997 stop = i < fColorCount - 1 ? stop + random->nextUScalar1() * (1.f - stop) : 1.f;
2000 fTileMode = static_cast<SkShader::TileMode>(random->nextULessThan(SkShader::kTileModeCount));