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/SkAlphaType.h"
9 #include "include/core/SkBlendMode.h"
10 #include "include/core/SkBlender.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkColorType.h"
13 #include "include/core/SkImageInfo.h"
14 #include "include/core/SkMatrix.h"
15 #include "include/core/SkPaint.h"
16 #include "include/core/SkPixmap.h"
17 #include "include/core/SkRect.h"
18 #include "include/core/SkRefCnt.h"
19 #include "include/core/SkSurfaceProps.h"
20 #include "include/private/base/SkAssert.h"
21 #include "include/private/base/SkCPUTypes.h"
22 #include "include/private/base/SkTemplates.h"
23 #include "src/base/SkArenaAlloc.h"
24 #include "src/core/SkBlendModePriv.h"
25 #include "src/core/SkBlenderBase.h"
26 #include "src/core/SkBlitter.h"
27 #include "src/core/SkColorSpacePriv.h"
28 #include "src/core/SkColorSpaceXformSteps.h"
29 #include "src/core/SkEffectPriv.h"
30 #include "src/core/SkMask.h"
31 #include "src/core/SkMemset.h"
32 #include "src/core/SkRasterPipeline.h"
33 #include "src/core/SkRasterPipelineOpContexts.h"
34 #include "src/core/SkRasterPipelineOpList.h"
35 #include "src/effects/colorfilters/SkColorFilterBase.h"
36 #include "src/shaders/SkShaderBase.h"
37
38 #include <cstdint>
39 #include <cstring>
40 #include <functional>
41 #include <optional>
42 #include <utility>
43
44 class SkColorSpace;
45 class SkShader;
46
47 class SkRasterPipelineBlitter final : public SkBlitter {
48 public:
49 // This is our common entrypoint for creating the blitter once we've sorted out shaders.
50 static SkBlitter* Create(const SkPixmap& dst,
51 const SkPaint& paint,
52 const SkColor4f& dstPaintColor,
53 SkArenaAlloc* alloc,
54 const SkRasterPipeline& shaderPipeline,
55 bool is_opaque,
56 bool is_constant,
57 const SkShader* clipShader);
58
SkRasterPipelineBlitter(SkPixmap dst,SkArenaAlloc * alloc)59 SkRasterPipelineBlitter(SkPixmap dst,
60 SkArenaAlloc* alloc)
61 : fDst(std::move(dst))
62 , fAlloc(alloc)
63 , fColorPipeline(alloc)
64 , fBlendPipeline(alloc)
65 {}
66
67 void blitH (int x, int y, int w) override;
68 void blitAntiH (int x, int y, const SkAlpha[], const int16_t[]) override;
69 void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override;
70 void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override;
71 void blitMask (const SkMask&, const SkIRect& clip) override;
72 void blitRect (int x, int y, int width, int height) override;
73 void blitV (int x, int y, int height, SkAlpha alpha) override;
74
75 private:
76 void appendLoadDst (SkRasterPipeline*) const;
77 void appendStore (SkRasterPipeline*) const;
78
79 // these check internally, and only append if there was a native clipShader
80 void appendClipScale (SkRasterPipeline*) const;
81 void appendClipLerp (SkRasterPipeline*) const;
82
83 SkPixmap fDst;
84 SkArenaAlloc* fAlloc;
85 SkRasterPipeline fColorPipeline;
86 SkRasterPipeline fBlendPipeline;
87 // If the blender is a blend-mode, we retain that information for late-stage optimizations
88 std::optional<SkBlendMode> fBlendMode;
89 // set to pipeline storage (for alpha) if we have a clipShader
90 void* fClipShaderBuffer = nullptr; // "native" : float or U16
91
92 SkRasterPipeline_MemoryCtx
93 fDstPtr = {nullptr,0}, // Always points to the top-left of fDst.
94 fMaskPtr = {nullptr,0}; // Updated each call to blitMask().
95 SkRasterPipeline_EmbossCtx fEmbossCtx; // Used only for k3D_Format masks.
96
97 // We may be able to specialize blitH() or blitRect() into a memset.
98 void (*fMemset2D)(SkPixmap*, int x,int y, int w,int h, uint64_t color) = nullptr;
99 uint64_t fMemsetColor = 0; // Big enough for largest memsettable dst format, F16.
100
101 // Built lazily on first use.
102 std::function<void(size_t, size_t, size_t, size_t)> fBlitRect,
103 fBlitAntiH,
104 fBlitMaskA8,
105 fBlitMaskLCD16,
106 fBlitMask3D;
107
108 // These values are pointed to by the blit pipelines above,
109 // which allows us to adjust them from call to call.
110 float fCurrentCoverage = 0.0f;
111 float fDitherRate = 0.0f;
112
113 using INHERITED = SkBlitter;
114 };
115
paint_color_to_dst(const SkPaint & paint,const SkPixmap & dst)116 static SkColor4f paint_color_to_dst(const SkPaint& paint, const SkPixmap& dst) {
117 SkColor4f paintColor = paint.getColor4f();
118 SkColorSpaceXformSteps(sk_srgb_singleton(), kUnpremul_SkAlphaType,
119 dst.colorSpace(), kUnpremul_SkAlphaType).apply(paintColor.vec());
120 return paintColor;
121 }
122
SkCreateRasterPipelineBlitter(const SkPixmap & dst,const SkPaint & paint,const SkMatrix & ctm,SkArenaAlloc * alloc,sk_sp<SkShader> clipShader,const SkSurfaceProps & props)123 SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap& dst,
124 const SkPaint& paint,
125 const SkMatrix& ctm,
126 SkArenaAlloc* alloc,
127 sk_sp<SkShader> clipShader,
128 const SkSurfaceProps& props) {
129 SkColorSpace* dstCS = dst.colorSpace();
130 SkColorType dstCT = dst.colorType();
131 SkColor4f dstPaintColor = paint_color_to_dst(paint, dst);
132
133 auto shader = as_SB(paint.getShader());
134
135 SkRasterPipeline_<256> shaderPipeline;
136 if (!shader) {
137 // Having no shader makes things nice and easy... just use the paint color
138 shaderPipeline.appendConstantColor(alloc, dstPaintColor.premul().vec());
139 bool is_opaque = dstPaintColor.fA == 1.0f,
140 is_constant = true;
141 return SkRasterPipelineBlitter::Create(dst, paint, dstPaintColor, alloc, shaderPipeline,
142 is_opaque, is_constant, clipShader.get());
143 }
144
145 bool is_opaque = shader->isOpaque() && dstPaintColor.fA == 1.0f;
146 bool is_constant = shader->isConstant();
147
148 if (shader->appendRootStages(SkStageRec{&shaderPipeline, alloc, dstCT, dstCS, dstPaintColor, props},
149 ctm)) {
150 if (dstPaintColor.fA != 1.0f) {
151 shaderPipeline.append(SkRasterPipelineOp::scale_1_float,
152 alloc->make<float>(dstPaintColor.fA));
153 }
154 return SkRasterPipelineBlitter::Create(dst, paint, dstPaintColor, alloc, shaderPipeline,
155 is_opaque, is_constant, clipShader.get());
156 }
157
158 // The shader can't draw with SkRasterPipeline.
159 return nullptr;
160 }
161
SkCreateRasterPipelineBlitter(const SkPixmap & dst,const SkPaint & paint,const SkRasterPipeline & shaderPipeline,bool is_opaque,SkArenaAlloc * alloc,sk_sp<SkShader> clipShader)162 SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap& dst,
163 const SkPaint& paint,
164 const SkRasterPipeline& shaderPipeline,
165 bool is_opaque,
166 SkArenaAlloc* alloc,
167 sk_sp<SkShader> clipShader) {
168 bool is_constant = false; // If this were the case, it'd be better to just set a paint color.
169 return SkRasterPipelineBlitter::Create(dst, paint, paint_color_to_dst(paint, dst), alloc,
170 shaderPipeline, is_opaque, is_constant,
171 clipShader.get());
172 }
173
Create(const SkPixmap & dst,const SkPaint & paint,const SkColor4f & dstPaintColor,SkArenaAlloc * alloc,const SkRasterPipeline & shaderPipeline,bool is_opaque,bool is_constant,const SkShader * clipShader)174 SkBlitter* SkRasterPipelineBlitter::Create(const SkPixmap& dst,
175 const SkPaint& paint,
176 const SkColor4f& dstPaintColor,
177 SkArenaAlloc* alloc,
178 const SkRasterPipeline& shaderPipeline,
179 bool is_opaque,
180 bool is_constant,
181 const SkShader* clipShader) {
182 auto blitter = alloc->make<SkRasterPipelineBlitter>(dst, alloc);
183
184 // Our job in this factory is to fill out the blitter's color and blend pipelines.
185 // The color pipeline is the common front of the full blit pipeline. The blend pipeline is just
186 // the portion that does the actual blending math (and assumes that src and dst are already
187 // loaded).
188 //
189 // The full blit pipelines are each constructed lazily on first use, and include the color
190 // pipeline, reading the dst, the blend pipeline, coverage, dithering, and writing the dst.
191
192 // Start with the color pipeline
193 auto colorPipeline = &blitter->fColorPipeline;
194
195 if (clipShader) {
196 auto clipP = colorPipeline;
197 SkColorType clipCT = kRGBA_8888_SkColorType;
198 SkColorSpace* clipCS = nullptr;
199 SkSurfaceProps props{}; // default OK; clipShader doesn't render text
200 SkStageRec rec = {clipP, alloc, clipCT, clipCS, SkColors::kBlack, props};
201 if (as_SB(clipShader)->appendRootStages(rec, SkMatrix::I())) {
202 struct Storage {
203 // large enough for highp (float) or lowp(U16)
204 float fA[SkRasterPipeline_kMaxStride];
205 };
206 auto storage = alloc->make<Storage>();
207 clipP->append(SkRasterPipelineOp::store_src_a, storage->fA);
208 blitter->fClipShaderBuffer = storage->fA;
209 is_constant = false;
210 } else {
211 return nullptr;
212 }
213 }
214
215 // Let's get the shader in first.
216 colorPipeline->extend(shaderPipeline);
217
218 // If there's a color filter it comes next.
219 if (auto colorFilter = paint.getColorFilter()) {
220 SkSurfaceProps props{}; // default OK; colorFilter doesn't render text
221 SkStageRec rec = {
222 colorPipeline, alloc, dst.colorType(), dst.colorSpace(), dstPaintColor, props};
223 if (!as_CFB(colorFilter)->appendStages(rec, is_opaque)) {
224 return nullptr;
225 }
226 is_opaque = is_opaque && as_CFB(colorFilter)->isAlphaUnchanged();
227 }
228
229 // Not all formats make sense to dither (think, F16). We set their dither rate
230 // to zero. We only dither non-constant shaders, so is_constant won't change here.
231 if (paint.isDither() && !is_constant) {
232 switch (dst.info().colorType()) {
233 case kARGB_4444_SkColorType:
234 blitter->fDitherRate = 1 / 15.0f;
235 break;
236 case kRGB_565_SkColorType:
237 blitter->fDitherRate = 1 / 63.0f;
238 break;
239 case kGray_8_SkColorType:
240 case kRGB_888x_SkColorType:
241 case kRGBA_8888_SkColorType:
242 case kBGRA_8888_SkColorType:
243 case kSRGBA_8888_SkColorType:
244 case kR8_unorm_SkColorType:
245 blitter->fDitherRate = 1 / 255.0f;
246 break;
247 case kRGB_101010x_SkColorType:
248 case kRGBA_1010102_SkColorType:
249 case kBGR_101010x_SkColorType:
250 case kBGRA_1010102_SkColorType:
251 case kBGRA_10101010_XR_SkColorType:
252 case kRGBA_10x6_SkColorType:
253 blitter->fDitherRate = 1 / 1023.0f;
254 break;
255
256 case kUnknown_SkColorType:
257 case kAlpha_8_SkColorType:
258 case kBGR_101010x_XR_SkColorType:
259 case kRGBA_F16_SkColorType:
260 case kRGB_F16F16F16x_SkColorType:
261 case kRGBA_F16Norm_SkColorType:
262 case kRGBA_F32_SkColorType:
263 case kR8G8_unorm_SkColorType:
264 case kA16_float_SkColorType:
265 case kA16_unorm_SkColorType:
266 case kR16G16_float_SkColorType:
267 case kR16G16_unorm_SkColorType:
268 case kR16G16B16A16_unorm_SkColorType:
269 blitter->fDitherRate = 0.0f;
270 break;
271 }
272 if (blitter->fDitherRate > 0.0f) {
273 colorPipeline->append(SkRasterPipelineOp::dither, &blitter->fDitherRate);
274 }
275 }
276
277 // Optimization: A pipeline that's still constant here can collapse back into a constant color.
278 if (is_constant) {
279 SkColor4f constantColor;
280 SkRasterPipeline_MemoryCtx constantColorPtr = { &constantColor, 0 };
281 // We could remove this clamp entirely, but if the destination is 8888, doing the clamp
282 // here allows the color pipeline to still run in lowp (we'll use uniform_color, rather than
283 // unbounded_uniform_color).
284 colorPipeline->appendClampIfNormalized(dst.info());
285 colorPipeline->append(SkRasterPipelineOp::store_f32, &constantColorPtr);
286 colorPipeline->run(0,0,1,1);
287 colorPipeline->reset();
288 colorPipeline->appendConstantColor(alloc, constantColor);
289
290 is_opaque = constantColor.fA == 1.0f;
291 }
292
293 // Now we'll build the blend pipeline
294 auto blendPipeline = &blitter->fBlendPipeline;
295
296 sk_sp<SkBlender> blender = paint.refBlender();
297 if (!blender) {
298 blender = SkBlender::Mode(SkBlendMode::kSrcOver);
299 }
300
301 // We can strength-reduce SrcOver into Src when opaque.
302 if (is_opaque && as_BB(blender)->asBlendMode() == SkBlendMode::kSrcOver) {
303 blender = SkBlender::Mode(SkBlendMode::kSrc);
304 }
305
306 // When we're drawing a constant color in Src mode, we can sometimes just memset.
307 // (The previous two optimizations help find more opportunities for this one.)
308 if (is_constant && as_BB(blender)->asBlendMode() == SkBlendMode::kSrc &&
309 dst.info().bytesPerPixel() <= static_cast<int>(sizeof(blitter->fMemsetColor))) {
310 // Run our color pipeline all the way through to produce what we'd memset when we can.
311 // Not all blits can memset, so we need to keep colorPipeline too.
312 SkRasterPipeline_<256> p;
313 p.extend(*colorPipeline);
314 blitter->fDstPtr = SkRasterPipeline_MemoryCtx{&blitter->fMemsetColor, 0};
315 blitter->appendStore(&p);
316 p.run(0,0,1,1);
317
318 switch (blitter->fDst.shiftPerPixel()) {
319 case 0: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
320 void* p = dst->writable_addr(x,y);
321 while (h --> 0) {
322 memset(p, c, w);
323 p = SkTAddOffset<void>(p, dst->rowBytes());
324 }
325 }; break;
326
327 case 1: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
328 SkOpts::rect_memset16(dst->writable_addr16(x,y), c, w, dst->rowBytes(), h);
329 }; break;
330
331 case 2: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
332 SkOpts::rect_memset32(dst->writable_addr32(x,y), c, w, dst->rowBytes(), h);
333 }; break;
334
335 case 3: blitter->fMemset2D = [](SkPixmap* dst, int x,int y, int w,int h, uint64_t c) {
336 SkOpts::rect_memset64(dst->writable_addr64(x,y), c, w, dst->rowBytes(), h);
337 }; break;
338
339 // TODO(F32)?
340 }
341 }
342
343 {
344 SkSurfaceProps props{}; // default OK; blender doesn't render text
345 SkStageRec rec = {
346 blendPipeline, alloc, dst.colorType(), dst.colorSpace(), dstPaintColor, props};
347 if (!as_BB(blender)->appendStages(rec)) {
348 return nullptr;
349 }
350 blitter->fBlendMode = as_BB(blender)->asBlendMode();
351 }
352
353 blitter->fDstPtr = SkRasterPipeline_MemoryCtx{
354 blitter->fDst.writable_addr(),
355 blitter->fDst.rowBytesAsPixels(),
356 };
357
358 return blitter;
359 }
360
appendLoadDst(SkRasterPipeline * p) const361 void SkRasterPipelineBlitter::appendLoadDst(SkRasterPipeline* p) const {
362 p->appendLoadDst(fDst.info().colorType(), &fDstPtr);
363 if (fDst.info().alphaType() == kUnpremul_SkAlphaType) {
364 p->append(SkRasterPipelineOp::premul_dst);
365 }
366 }
367
appendStore(SkRasterPipeline * p) const368 void SkRasterPipelineBlitter::appendStore(SkRasterPipeline* p) const {
369 if (fDst.info().alphaType() == kUnpremul_SkAlphaType) {
370 p->append(SkRasterPipelineOp::unpremul);
371 }
372 p->appendStore(fDst.info().colorType(), &fDstPtr);
373 }
374
appendClipScale(SkRasterPipeline * p) const375 void SkRasterPipelineBlitter::appendClipScale(SkRasterPipeline* p) const {
376 if (fClipShaderBuffer) {
377 p->append(SkRasterPipelineOp::scale_native, fClipShaderBuffer);
378 }
379 }
380
appendClipLerp(SkRasterPipeline * p) const381 void SkRasterPipelineBlitter::appendClipLerp(SkRasterPipeline* p) const {
382 if (fClipShaderBuffer) {
383 p->append(SkRasterPipelineOp::lerp_native, fClipShaderBuffer);
384 }
385 }
386
blitH(int x,int y,int w)387 void SkRasterPipelineBlitter::blitH(int x, int y, int w) {
388 this->blitRect(x,y,w,1);
389 }
390
blitRect(int x,int y,int w,int h)391 void SkRasterPipelineBlitter::blitRect(int x, int y, int w, int h) {
392 if (fMemset2D) {
393 fMemset2D(&fDst, x,y, w,h, fMemsetColor);
394 return;
395 }
396
397 if (!fBlitRect) {
398 SkRasterPipeline p(fAlloc);
399 p.extend(fColorPipeline);
400 p.appendClampIfNormalized(fDst.info());
401 if (fBlendMode == SkBlendMode::kSrcOver
402 && (fDst.info().colorType() == kRGBA_8888_SkColorType ||
403 fDst.info().colorType() == kBGRA_8888_SkColorType)
404 && !fDst.colorSpace()
405 && fDst.info().alphaType() != kUnpremul_SkAlphaType
406 && fDitherRate == 0.0f) {
407 if (fDst.info().colorType() == kBGRA_8888_SkColorType) {
408 p.append(SkRasterPipelineOp::swap_rb);
409 }
410 this->appendClipScale(&p);
411 p.append(SkRasterPipelineOp::srcover_rgba_8888, &fDstPtr);
412 } else {
413 if (fBlendMode != SkBlendMode::kSrc) {
414 this->appendLoadDst(&p);
415 p.extend(fBlendPipeline);
416 this->appendClipLerp(&p);
417 } else if (fClipShaderBuffer) {
418 this->appendLoadDst(&p);
419 this->appendClipLerp(&p);
420 }
421 this->appendStore(&p);
422 }
423 fBlitRect = p.compile();
424 }
425
426 fBlitRect(x,y,w,h);
427 }
428
blitAntiH(int x,int y,const SkAlpha aa[],const int16_t runs[])429 void SkRasterPipelineBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) {
430 if (!fBlitAntiH) {
431 SkRasterPipeline p(fAlloc);
432 p.extend(fColorPipeline);
433 p.appendClampIfNormalized(fDst.info());
434 if (fBlendMode.has_value() &&
435 SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/false)) {
436 p.append(SkRasterPipelineOp::scale_1_float, &fCurrentCoverage);
437 this->appendClipScale(&p);
438 this->appendLoadDst(&p);
439 p.extend(fBlendPipeline);
440 } else {
441 this->appendLoadDst(&p);
442 p.extend(fBlendPipeline);
443 p.append(SkRasterPipelineOp::lerp_1_float, &fCurrentCoverage);
444 this->appendClipLerp(&p);
445 }
446
447 this->appendStore(&p);
448 fBlitAntiH = p.compile();
449 }
450
451 for (int16_t run = *runs; run > 0; run = *runs) {
452 switch (*aa) {
453 case 0x00: break;
454 case 0xff: this->blitRect(x,y,run, 1); break;
455 default:
456 fCurrentCoverage = *aa * (1/255.0f);
457 fBlitAntiH(x,y,run,1);
458 }
459 x += run;
460 runs += run;
461 aa += run;
462 }
463 }
464
blitAntiH2(int x,int y,U8CPU a0,U8CPU a1)465 void SkRasterPipelineBlitter::blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) {
466 SkIRect clip = {x,y, x+2,y+1};
467 uint8_t coverage[] = { (uint8_t)a0, (uint8_t)a1 };
468 SkMask mask(coverage, clip, 2, SkMask::kA8_Format);
469 this->blitMask(mask, clip);
470 }
471
blitAntiV2(int x,int y,U8CPU a0,U8CPU a1)472 void SkRasterPipelineBlitter::blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) {
473 SkIRect clip = {x,y, x+1,y+2};
474 uint8_t coverage[] = { (uint8_t)a0, (uint8_t)a1 };
475 SkMask mask(coverage, clip, 1, SkMask::kA8_Format);
476 this->blitMask(mask, clip);
477 }
478
blitV(int x,int y,int height,SkAlpha alpha)479 void SkRasterPipelineBlitter::blitV(int x, int y, int height, SkAlpha alpha) {
480 SkIRect clip = {x,y, x+1,y+height};
481 SkMask mask(&alpha, clip,
482 0, // so we reuse the 1 "row" for all of height
483 SkMask::kA8_Format);
484 this->blitMask(mask, clip);
485 }
486
blitMask(const SkMask & mask,const SkIRect & clip)487 void SkRasterPipelineBlitter::blitMask(const SkMask& mask, const SkIRect& clip) {
488 if (mask.fFormat == SkMask::kBW_Format) {
489 // TODO: native BW masks?
490 return INHERITED::blitMask(mask, clip);
491 }
492
493 // ARGB and SDF masks shouldn't make it here.
494 SkASSERT(mask.fFormat == SkMask::kA8_Format
495 || mask.fFormat == SkMask::kLCD16_Format
496 || mask.fFormat == SkMask::k3D_Format);
497
498 auto extract_mask_plane = [&mask](int plane, SkRasterPipeline_MemoryCtx* ctx) {
499 // LCD is 16-bit per pixel; A8 and 3D are 8-bit per pixel.
500 size_t bpp = mask.fFormat == SkMask::kLCD16_Format ? 2 : 1;
501
502 // Select the right mask plane. Usually plane == 0 and this is just mask.fImage.
503 auto ptr = (uintptr_t)mask.fImage
504 + plane * mask.computeImageSize();
505
506 // Update ctx to point "into" this current mask, but lined up with fDstPtr at (0,0).
507 // This sort of trickery upsets UBSAN (pointer-overflow) so our ptr must be a uintptr_t.
508 // mask.fRowBytes is a uint32_t, which would break our addressing math on 64-bit builds.
509 size_t rowBytes = mask.fRowBytes;
510 ctx->stride = rowBytes / bpp;
511 ctx->pixels = (void*)(ptr - mask.fBounds.left() * bpp
512 - mask.fBounds.top() * rowBytes);
513 };
514
515 extract_mask_plane(0, &fMaskPtr);
516 if (mask.fFormat == SkMask::k3D_Format) {
517 extract_mask_plane(1, &fEmbossCtx.mul);
518 extract_mask_plane(2, &fEmbossCtx.add);
519 }
520
521 // Lazily build whichever pipeline we need, specialized for each mask format.
522 if (mask.fFormat == SkMask::kA8_Format && !fBlitMaskA8) {
523 SkRasterPipeline p(fAlloc);
524 p.extend(fColorPipeline);
525 p.appendClampIfNormalized(fDst.info());
526 if (fBlendMode.has_value() &&
527 SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/false)) {
528 p.append(SkRasterPipelineOp::scale_u8, &fMaskPtr);
529 this->appendClipScale(&p);
530 this->appendLoadDst(&p);
531 p.extend(fBlendPipeline);
532 } else {
533 this->appendLoadDst(&p);
534 p.extend(fBlendPipeline);
535 p.append(SkRasterPipelineOp::lerp_u8, &fMaskPtr);
536 this->appendClipLerp(&p);
537 }
538 this->appendStore(&p);
539 fBlitMaskA8 = p.compile();
540 }
541 if (mask.fFormat == SkMask::kLCD16_Format && !fBlitMaskLCD16) {
542 SkRasterPipeline p(fAlloc);
543 p.extend(fColorPipeline);
544 p.appendClampIfNormalized(fDst.info());
545 if (fBlendMode.has_value() &&
546 SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/true)) {
547 // Somewhat unusually, scale_565 needs dst loaded first.
548 this->appendLoadDst(&p);
549 p.append(SkRasterPipelineOp::scale_565, &fMaskPtr);
550 this->appendClipScale(&p);
551 p.extend(fBlendPipeline);
552 } else {
553 this->appendLoadDst(&p);
554 p.extend(fBlendPipeline);
555 p.append(SkRasterPipelineOp::lerp_565, &fMaskPtr);
556 this->appendClipLerp(&p);
557 }
558 this->appendStore(&p);
559 fBlitMaskLCD16 = p.compile();
560 }
561 if (mask.fFormat == SkMask::k3D_Format && !fBlitMask3D) {
562 SkRasterPipeline p(fAlloc);
563 p.extend(fColorPipeline);
564 // This bit is where we differ from kA8_Format:
565 p.append(SkRasterPipelineOp::emboss, &fEmbossCtx);
566 // Now onward just as kA8.
567 p.appendClampIfNormalized(fDst.info());
568 if (fBlendMode.has_value() &&
569 SkBlendMode_ShouldPreScaleCoverage(*fBlendMode, /*rgb_coverage=*/false)) {
570 p.append(SkRasterPipelineOp::scale_u8, &fMaskPtr);
571 this->appendClipScale(&p);
572 this->appendLoadDst(&p);
573 p.extend(fBlendPipeline);
574 } else {
575 this->appendLoadDst(&p);
576 p.extend(fBlendPipeline);
577 p.append(SkRasterPipelineOp::lerp_u8, &fMaskPtr);
578 this->appendClipLerp(&p);
579 }
580 this->appendStore(&p);
581 fBlitMask3D = p.compile();
582 }
583
584 std::function<void(size_t,size_t,size_t,size_t)>* blitter = nullptr;
585 switch (mask.fFormat) {
586 case SkMask::kA8_Format: blitter = &fBlitMaskA8; break;
587 case SkMask::kLCD16_Format: blitter = &fBlitMaskLCD16; break;
588 case SkMask::k3D_Format: blitter = &fBlitMask3D; break;
589 default:
590 SkASSERT(false);
591 return;
592 }
593
594 SkASSERT(blitter);
595 (*blitter)(clip.left(),clip.top(), clip.width(),clip.height());
596 }
597