1/*
2 * Copyright 2016 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 "include/core/SkColor.h"
9#include "include/core/SkPaint.h"
10#include "include/core/SkShader.h"
11#include "include/private/SkTo.h"
12#include "src/core/SkArenaAlloc.h"
13#include "src/core/SkBlendModePriv.h"
14#include "src/core/SkBlitter.h"
15#include "src/core/SkColorFilterBase.h"
16#include "src/core/SkColorSpacePriv.h"
17#include "src/core/SkColorSpaceXformSteps.h"
18#include "src/core/SkMatrixProvider.h"
19#include "src/core/SkOpts.h"
20#include "src/core/SkRasterPipeline.h"
21#include "src/core/SkUtils.h"
22#include "src/shaders/SkShaderBase.h"
23
24class SkRasterPipelineBlitter final : public SkBlitter {
25public:
26 // This is our common entrypoint for creating the blitter once we've sorted out shaders.
27 static SkBlitter* Create(const SkPixmap&, const SkPaint&, SkArenaAlloc*,
28 const SkRasterPipeline& shaderPipeline,
29 bool is_opaque, bool is_constant,
30 sk_sp<SkShader> clipShader);
31
32 SkRasterPipelineBlitter(SkPixmap dst,
33 SkBlendMode blend,
34 SkArenaAlloc* alloc)
35 : fDst(dst)
36 , fBlend(blend)
37 , fAlloc(alloc)
38 , fColorPipeline(alloc)
39 {}
40
41 void blitH (int x, int y, int w) override;
42 void blitAntiH (int x, int y, const SkAlpha[], const int16_t[]) override;
43 void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override;
44 void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override;
45 void blitMask (const SkMask&, const SkIRect& clip) override;
46 void blitRect (int x, int y, int width, int height) override;
47 void blitV (int x, int y, int height, SkAlpha alpha) override;
48
49private:
50 void append_load_dst (SkRasterPipeline*) const;
51 void append_store (SkRasterPipeline*) const;
52
53 // these check internally, and only append if there was a native clipShader
54 void append_clip_scale (SkRasterPipeline*) const;
55 void append_clip_lerp (SkRasterPipeline*) const;
56
57 SkPixmap fDst;
58 SkBlendMode fBlend;
59 SkArenaAlloc* fAlloc;
60 SkRasterPipeline fColorPipeline;
61 // set to pipeline storage (for alpha) if we have a clipShader
62 void* fClipShaderBuffer = nullptr; // "native" : float or U16
63
64 SkRasterPipeline_MemoryCtx
65 fDstPtr = {nullptr,0}, // Always points to the top-left of fDst.
66 fMaskPtr = {nullptr,0}; // Updated each call to blitMask().
67 SkRasterPipeline_EmbossCtx fEmbossCtx; // Used only for k3D_Format masks.
68
69 // We may be able to specialize blitH() or blitRect() into a memset.
70 void (*fMemset2D)(SkPixmap*, int x,int y, int w,int h, uint64_t color) = nullptr;
71 uint64_t fMemsetColor = 0; // Big enough for largest memsettable dst format, F16.
72
73 // Built lazily on first use.
74 std::function<void(size_t, size_t, size_t, size_t)> fBlitRect,
75 fBlitAntiH,
76 fBlitMaskA8,
77 fBlitMaskLCD16,
78 fBlitMask3D;
79
80 // These values are pointed to by the blit pipelines above,
81 // which allows us to adjust them from call to call.
82 float fCurrentCoverage = 0.0f;
83 float fDitherRate = 0.0f;
84
85 typedef SkBlitter INHERITED;
86};
87
88SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap& dst,
89 const SkPaint& paint,
90 const SkMatrixProvider& matrixProvider,
91 SkArenaAlloc* alloc,
92 sk_sp<SkShader> clipShader) {
93 SkColorSpace* dstCS = dst.colorSpace();
94 SkColorType dstCT = dst.colorType();
95 SkColor4f paintColor = paint.getColor4f();
96 SkColorSpaceXformSteps(sk_srgb_singleton(), kUnpremul_SkAlphaType,
97 dstCS, kUnpremul_SkAlphaType).apply(paintColor.vec());
98
99 auto shader = as_SB(paint.getShader());
100
101 SkRasterPipeline_<256> shaderPipeline;
102 if (!shader) {
103 // Having no shader makes things nice and easy... just use the paint color.
104 shaderPipeline.append_constant_color(alloc, paintColor.premul().vec());
105 bool is_opaque = paintColor.fA == 1.0f,
106 is_constant = true;
107 return SkRasterPipelineBlitter::Create(dst, paint, alloc,
108 shaderPipeline, is_opaque, is_constant,
109 std::move(clipShader));
110 }
111
112 bool is_opaque = shader->isOpaque() && paintColor.fA == 1.0f;
113 bool is_constant = shader->isConstant();
114
115 if (shader->appendStages(
116 {&shaderPipeline, alloc, dstCT, dstCS, paint, nullptr, matrixProvider})) {
117 if (paintColor.fA != 1.0f) {
118 shaderPipeline.append(SkRasterPipeline::scale_1_float,
119 alloc->make<float>(paintColor.fA));
120 }
121 return SkRasterPipelineBlitter::Create(dst, paint, alloc,
122 shaderPipeline, is_opaque, is_constant,
123 std::move(clipShader));
124 }
125
126 // The shader can't draw with SkRasterPipeline.
127 return nullptr;
128}
129
130SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap& dst,
131 const SkPaint& paint,
132 const SkRasterPipeline& shaderPipeline,
133 bool is_opaque,
134 SkArenaAlloc* alloc,
135 sk_sp<SkShader> clipShader) {
136 bool is_constant = false; // If this were the case, it'd be better to just set a paint color.
137 return SkRasterPipelineBlitter::Create(dst, paint, alloc,
138 shaderPipeline, is_opaque, is_constant,
139 clipShader);
140}
141
142SkBlitter* SkRasterPipelineBlitter::Create(const SkPixmap& dst,
143 const SkPaint& paint,
144 SkArenaAlloc* alloc,
145 const SkRasterPipeline& shaderPipeline,
146 bool is_opaque,
147 bool is_constant,
148 sk_sp<SkShader> clipShader) {
149 auto blitter = alloc->make<SkRasterPipelineBlitter>(dst,
150 paint.getBlendMode(),
151 alloc);
152
153
154 // Our job in this factory is to fill out the blitter's color pipeline.
155 // This is the common front of the full blit pipelines, each constructed lazily on first use.
156 // The full blit pipelines handle reading and writing the dst, blending, coverage, dithering.
157 auto colorPipeline = &blitter->fColorPipeline;
158
159 if (clipShader) {
160 auto clipP = colorPipeline;
161 SkPaint clipPaint; // just need default values
162 SkColorType clipCT = kRGBA_8888_SkColorType;
163 SkColorSpace* clipCS = nullptr;
164 SkSimpleMatrixProvider clipMatrixProvider(SkMatrix::I());
165 SkStageRec rec = {clipP, alloc, clipCT, clipCS, clipPaint, nullptr, clipMatrixProvider};
166 if (as_SB(clipShader)->appendStages(rec)) {
167 struct Storage {
168 // large enough for highp (float) or lowp(U16)
169 float fA[SkRasterPipeline_kMaxStride];
170 };
171 auto storage = alloc->make<Storage>();
172 clipP->append(SkRasterPipeline::store_src_a, storage->fA);
173 blitter->fClipShaderBuffer = storage->fA;
174 is_constant = false;
175 }
176 }
177
178 // Let's get the shader in first.
179 colorPipeline->extend(shaderPipeline);
180
181 // If there's a color filter it comes next.
182 if (auto colorFilter = paint.getColorFilter()) {
183 SkSimpleMatrixProvider matrixProvider(SkMatrix::I());
184 SkStageRec rec = {
185 colorPipeline, alloc, dst.colorType(), dst.colorSpace(), paint, nullptr, matrixProvider
186 };
187 if (!as_CFB(colorFilter)->appendStages(rec, is_opaque)) {
188 return nullptr;
189 }
190 is_opaque = is_opaque && as_CFB(colorFilter)->isAlphaUnchanged();
191 }
192
193#if defined(SK_LATE_DITHER)
194 // Not all formats make sense to dither (think, F16). We set their dither rate
195 // to zero. We need to decide if we're going to dither now to keep is_constant accurate.
196 if (paint.isDither()) {
197 switch (dst.info().colorType()) {
198 case kARGB_4444_SkColorType: blitter->fDitherRate = 1/15.0f; break;
199 case kRGB_565_SkColorType: blitter->fDitherRate = 1/63.0f; break;
200 case kGray_8_SkColorType:
201 case kRGB_888x_SkColorType:
202 case kRGBA_8888_SkColorType:
203 case kBGRA_8888_SkColorType: blitter->fDitherRate = 1/255.0f; break;
204 case kRGB_101010x_SkColorType:
205 case kRGBA_1010102_SkColorType:
206 case kBGR_101010x_SkColorType:
207 case kBGRA_1010102_SkColorType: blitter->fDitherRate = 1/1023.0f; break;
208
209 case kUnknown_SkColorType:
210 case kAlpha_8_SkColorType:
211 case kRGBA_F16_SkColorType:
212 case kRGBA_F16Norm_SkColorType:
213 case kRGBA_F32_SkColorType:
214 case kR8G8_unorm_SkColorType:
215 case kA16_float_SkColorType:
216 case kA16_unorm_SkColorType:
217 case kR16G16_float_SkColorType:
218 case kR16G16_unorm_SkColorType:
219 case kR16G16B16A16_unorm_SkColorType: blitter->fDitherRate = 0.0f; break;
220 }
221 // TODO: for constant colors, we could try to measure the effect of dithering, and if
222 // it has no value (i.e. all variations result in the same 32bit color, then we
223 // could disable it (for speed, by not adding the stage).
224 }
225 is_constant = is_constant && (blitter->fDitherRate == 0.0f);
226#else
227 // Not all formats make sense to dither (think, F16). We set their dither rate
228 // to zero. We only dither non-constant shaders, so is_constant won't change here.
229 if (paint.isDither() && !is_constant) {
230 switch (dst.info().colorType()) {
231 case kARGB_4444_SkColorType: blitter->fDitherRate = 1/15.0f; break;
232 case kRGB_565_SkColorType: blitter->fDitherRate = 1/63.0f; break;
233 case kGray_8_SkColorType:
234 case kRGB_888x_SkColorType:
235 case kRGBA_8888_SkColorType:
236 case kBGRA_8888_SkColorType: blitter->fDitherRate = 1/255.0f; break;
237 case kRGB_101010x_SkColorType:
238 case kRGBA_1010102_SkColorType:
239 case kBGR_101010x_SkColorType:
240 case kBGRA_1010102_SkColorType: blitter->fDitherRate = 1/1023.0f; break;
241
242 case kUnknown_SkColorType:
243 case kAlpha_8_SkColorType:
244 case kRGBA_F16_SkColorType:
245 case kRGBA_F16Norm_SkColorType:
246 case kRGBA_F32_SkColorType:
247 case kR8G8_unorm_SkColorType:
248 case kA16_float_SkColorType:
249 case kA16_unorm_SkColorType:
250 case kR16G16_float_SkColorType:
251 case kR16G16_unorm_SkColorType:
252 case kR16G16B16A16_unorm_SkColorType: blitter->fDitherRate = 0.0f; break;
253 }
254 if (blitter->fDitherRate > 0.0f) {
255 colorPipeline->append(SkRasterPipeline::dither, &blitter->fDitherRate);
256 }
257 }
258#endif
259
260 // We're logically done here. The code between here and return blitter is all optimization.
261
262 // A pipeline that's still constant here can collapse back into a constant color.
263 if (is_constant) {
264 SkColor4f constantColor;
265 SkRasterPipeline_MemoryCtx constantColorPtr = { &constantColor, 0 };
266 colorPipeline->append_gamut_clamp_if_normalized(dst.info());
267 colorPipeline->append(SkRasterPipeline::store_f32, &constantColorPtr);
268 colorPipeline->run(0,0,1,1);
269 colorPipeline->reset();
270 colorPipeline->append_constant_color(alloc, constantColor);
271
272 is_opaque = constantColor.fA == 1.0f;
273 }
274
275 // We can strength-reduce SrcOver into Src when opaque.
276 if (is_opaque && blitter->fBlend == SkBlendMode::kSrcOver) {
277 blitter->fBlend = SkBlendMode::kSrc;
278 }
279
280 // When we're drawing a constant color in Src mode, we can sometimes just memset.
281 // (The previous two optimizations help find more opportunities for this one.)
282 if (is_constant && blitter->fBlend == SkBlendMode::kSrc) {
283 // Run our color pipeline all the way through to produce what we'd memset when we can.
284 // Not all blits can memset, so we need to keep colorPipeline too.
285 SkRasterPipeline_<256> p;
286 p.extend(*colorPipeline);
287 p.append_gamut_clamp_if_normalized(dst.info());
288 blitter->fDstPtr = SkRasterPipeline_MemoryCtx{&blitter->fMemsetColor, 0};
289 blitter->append_store(&p);
290 p.run(0,0,1,1);
291
292 switch (blitter->fDst.shiftPerPixel()) {
293 case 0: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
294 void* p = dst->writable_addr(x,y);
295 while (h --> 0) {
296 memset(p, c, w);
297 p = SkTAddOffset<void>(p, dst->rowBytes());
298 }
299 }; break;
300
301 case 1: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
302 SkOpts::rect_memset16(dst->writable_addr16(x,y), c, w, dst->rowBytes(), h);
303 }; break;
304
305 case 2: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
306 SkOpts::rect_memset32(dst->writable_addr32(x,y), c, w, dst->rowBytes(), h);
307 }; break;
308
309 case 3: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
310 SkOpts::rect_memset64(dst->writable_addr64(x,y), c, w, dst->rowBytes(), h);
311 }; break;
312
313 // TODO(F32)?
314 }
315 }
316
317 blitter->fDstPtr = SkRasterPipeline_MemoryCtx{
318 blitter->fDst.writable_addr(),
319 blitter->fDst.rowBytesAsPixels(),
320 };
321
322 return blitter;
323}
324
325void SkRasterPipelineBlitter::append_load_dst(SkRasterPipeline* p) const {
326 p->append_load_dst(fDst.info().colorType(), &fDstPtr);
327 if (fDst.info().alphaType() == kUnpremul_SkAlphaType) {
328 p->append(SkRasterPipeline::premul_dst);
329 }
330}
331
332void SkRasterPipelineBlitter::append_store(SkRasterPipeline* p) const {
333 if (fDst.info().alphaType() == kUnpremul_SkAlphaType) {
334 p->append(SkRasterPipeline::unpremul);
335 }
336#if defined(SK_LATE_DITHER)
337 if (fDitherRate > 0.0f) {
338 p->append(SkRasterPipeline::dither, &fDitherRate);
339 }
340#endif
341
342 p->append_store(fDst.info().colorType(), &fDstPtr);
343}
344
345void SkRasterPipelineBlitter::append_clip_scale(SkRasterPipeline* p) const {
346 if (fClipShaderBuffer) {
347 p->append(SkRasterPipeline::scale_native, fClipShaderBuffer);
348 }
349}
350
351void SkRasterPipelineBlitter::append_clip_lerp(SkRasterPipeline* p) const {
352 if (fClipShaderBuffer) {
353 p->append(SkRasterPipeline::lerp_native, fClipShaderBuffer);
354 }
355}
356
357void SkRasterPipelineBlitter::blitH(int x, int y, int w) {
358 this->blitRect(x,y,w,1);
359}
360
361void SkRasterPipelineBlitter::blitRect(int x, int y, int w, int h) {
362 if (fMemset2D) {
363 fMemset2D(&fDst, x,y, w,h, fMemsetColor);
364 return;
365 }
366
367 if (!fBlitRect) {
368 SkRasterPipeline p(fAlloc);
369 p.extend(fColorPipeline);
370 p.append_gamut_clamp_if_normalized(fDst.info());
371 if (fBlend == SkBlendMode::kSrcOver
372 && (fDst.info().colorType() == kRGBA_8888_SkColorType ||
373 fDst.info().colorType() == kBGRA_8888_SkColorType)
374 && !fDst.colorSpace()
375 && fDst.info().alphaType() != kUnpremul_SkAlphaType
376 && fDitherRate == 0.0f) {
377 if (fDst.info().colorType() == kBGRA_8888_SkColorType) {
378 p.append(SkRasterPipeline::swap_rb);
379 }
380 this->append_clip_scale(&p);
381 p.append(SkRasterPipeline::srcover_rgba_8888, &fDstPtr);
382 } else {
383 if (fBlend != SkBlendMode::kSrc) {
384 this->append_load_dst(&p);
385 SkBlendMode_AppendStages(fBlend, &p);
386 this->append_clip_lerp(&p);
387 } else if (fClipShaderBuffer) {
388 this->append_load_dst(&p);
389 this->append_clip_lerp(&p);
390 }
391 this->append_store(&p);
392 }
393 fBlitRect = p.compile();
394 }
395
396 fBlitRect(x,y,w,h);
397}
398
399void SkRasterPipelineBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) {
400 if (!fBlitAntiH) {
401 SkRasterPipeline p(fAlloc);
402 p.extend(fColorPipeline);
403 p.append_gamut_clamp_if_normalized(fDst.info());
404 if (SkBlendMode_ShouldPreScaleCoverage(fBlend, /*rgb_coverage=*/false)) {
405 p.append(SkRasterPipeline::scale_1_float, &fCurrentCoverage);
406 this->append_clip_scale(&p);
407 this->append_load_dst(&p);
408 SkBlendMode_AppendStages(fBlend, &p);
409 } else {
410 this->append_load_dst(&p);
411 SkBlendMode_AppendStages(fBlend, &p);
412 p.append(SkRasterPipeline::lerp_1_float, &fCurrentCoverage);
413 this->append_clip_lerp(&p);
414 }
415
416 this->append_store(&p);
417 fBlitAntiH = p.compile();
418 }
419
420 for (int16_t run = *runs; run > 0; run = *runs) {
421 switch (*aa) {
422 case 0x00: break;
423 case 0xff: this->blitH(x,y,run); break;
424 default:
425 fCurrentCoverage = *aa * (1/255.0f);
426 fBlitAntiH(x,y,run,1);
427 }
428 x += run;
429 runs += run;
430 aa += run;
431 }
432}
433
434void SkRasterPipelineBlitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) {
435 SkIRect clip = {x,y, x+2,y+1};
436 uint8_t coverage[] = { (uint8_t)a0, (uint8_t)a1 };
437
438 SkMask mask;
439 mask.fImage = coverage;
440 mask.fBounds = clip;
441 mask.fRowBytes = 2;
442 mask.fFormat = SkMask::kA8_Format;
443
444 this->blitMask(mask, clip);
445}
446
447void SkRasterPipelineBlitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) {
448 SkIRect clip = {x,y, x+1,y+2};
449 uint8_t coverage[] = { (uint8_t)a0, (uint8_t)a1 };
450
451 SkMask mask;
452 mask.fImage = coverage;
453 mask.fBounds = clip;
454 mask.fRowBytes = 1;
455 mask.fFormat = SkMask::kA8_Format;
456
457 this->blitMask(mask, clip);
458}
459
460void SkRasterPipelineBlitter::blitV(int x, int y, int height, SkAlpha alpha) {
461 SkIRect clip = {x,y, x+1,y+height};
462
463 SkMask mask;
464 mask.fImage = &alpha;
465 mask.fBounds = clip;
466 mask.fRowBytes = 0; // so we reuse the 1 "row" for all of height
467 mask.fFormat = SkMask::kA8_Format;
468
469 this->blitMask(mask, clip);
470}
471
472void SkRasterPipelineBlitter::blitMask(const SkMask& mask, const SkIRect& clip) {
473 if (mask.fFormat == SkMask::kBW_Format) {
474 // TODO: native BW masks?
475 return INHERITED::blitMask(mask, clip);
476 }
477
478 // ARGB and SDF masks shouldn't make it here.
479 SkASSERT(mask.fFormat == SkMask::kA8_Format
480 || mask.fFormat == SkMask::kLCD16_Format
481 || mask.fFormat == SkMask::k3D_Format);
482
483 auto extract_mask_plane = [&mask](int plane, SkRasterPipeline_MemoryCtx* ctx) {
484 // LCD is 16-bit per pixel; A8 and 3D are 8-bit per pixel.
485 size_t bpp = mask.fFormat == SkMask::kLCD16_Format ? 2 : 1;
486
487 // Select the right mask plane. Usually plane == 0 and this is just mask.fImage.
488 auto ptr = (uintptr_t)mask.fImage
489 + plane * mask.computeImageSize();
490
491 // Update ctx to point "into" this current mask, but lined up with fDstPtr at (0,0).
492 // This sort of trickery upsets UBSAN (pointer-overflow) so our ptr must be a uintptr_t.
493 // mask.fRowBytes is a uint32_t, which would break our addressing math on 64-bit builds.
494 size_t rowBytes = mask.fRowBytes;
495 ctx->stride = rowBytes / bpp;
496 ctx->pixels = (void*)(ptr - mask.fBounds.left() * bpp
497 - mask.fBounds.top() * rowBytes);
498 };
499
500 extract_mask_plane(0, &fMaskPtr);
501 if (mask.fFormat == SkMask::k3D_Format) {
502 extract_mask_plane(1, &fEmbossCtx.mul);
503 extract_mask_plane(2, &fEmbossCtx.add);
504 }
505
506 // Lazily build whichever pipeline we need, specialized for each mask format.
507 if (mask.fFormat == SkMask::kA8_Format && !fBlitMaskA8) {
508 SkRasterPipeline p(fAlloc);
509 p.extend(fColorPipeline);
510 p.append_gamut_clamp_if_normalized(fDst.info());
511 if (SkBlendMode_ShouldPreScaleCoverage(fBlend, /*rgb_coverage=*/false)) {
512 p.append(SkRasterPipeline::scale_u8, &fMaskPtr);
513 this->append_clip_scale(&p);
514 this->append_load_dst(&p);
515 SkBlendMode_AppendStages(fBlend, &p);
516 } else {
517 this->append_load_dst(&p);
518 SkBlendMode_AppendStages(fBlend, &p);
519 p.append(SkRasterPipeline::lerp_u8, &fMaskPtr);
520 this->append_clip_lerp(&p);
521 }
522 this->append_store(&p);
523 fBlitMaskA8 = p.compile();
524 }
525 if (mask.fFormat == SkMask::kLCD16_Format && !fBlitMaskLCD16) {
526 SkRasterPipeline p(fAlloc);
527 p.extend(fColorPipeline);
528 p.append_gamut_clamp_if_normalized(fDst.info());
529 if (SkBlendMode_ShouldPreScaleCoverage(fBlend, /*rgb_coverage=*/true)) {
530 // Somewhat unusually, scale_565 needs dst loaded first.
531 this->append_load_dst(&p);
532 p.append(SkRasterPipeline::scale_565, &fMaskPtr);
533 this->append_clip_scale(&p);
534 SkBlendMode_AppendStages(fBlend, &p);
535 } else {
536 this->append_load_dst(&p);
537 SkBlendMode_AppendStages(fBlend, &p);
538 p.append(SkRasterPipeline::lerp_565, &fMaskPtr);
539 this->append_clip_lerp(&p);
540 }
541 this->append_store(&p);
542 fBlitMaskLCD16 = p.compile();
543 }
544 if (mask.fFormat == SkMask::k3D_Format && !fBlitMask3D) {
545 SkRasterPipeline p(fAlloc);
546 p.extend(fColorPipeline);
547 // This bit is where we differ from kA8_Format:
548 p.append(SkRasterPipeline::emboss, &fEmbossCtx);
549 // Now onward just as kA8.
550 p.append_gamut_clamp_if_normalized(fDst.info());
551 if (SkBlendMode_ShouldPreScaleCoverage(fBlend, /*rgb_coverage=*/false)) {
552 p.append(SkRasterPipeline::scale_u8, &fMaskPtr);
553 this->append_clip_scale(&p);
554 this->append_load_dst(&p);
555 SkBlendMode_AppendStages(fBlend, &p);
556 } else {
557 this->append_load_dst(&p);
558 SkBlendMode_AppendStages(fBlend, &p);
559 p.append(SkRasterPipeline::lerp_u8, &fMaskPtr);
560 this->append_clip_lerp(&p);
561 }
562 this->append_store(&p);
563 fBlitMask3D = p.compile();
564 }
565
566 std::function<void(size_t,size_t,size_t,size_t)>* blitter = nullptr;
567 switch (mask.fFormat) {
568 case SkMask::kA8_Format: blitter = &fBlitMaskA8; break;
569 case SkMask::kLCD16_Format: blitter = &fBlitMaskLCD16; break;
570 case SkMask::k3D_Format: blitter = &fBlitMask3D; break;
571 default:
572 SkASSERT(false);
573 return;
574 }
575
576 SkASSERT(blitter);
577 (*blitter)(clip.left(),clip.top(), clip.width(),clip.height());
578}
579