1/*
2 * Copyright 2015 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 "SkTableColorFilter.h"
9#include "SkPM4f.h"
10#include "SkArenaAlloc.h"
11#include "SkBitmap.h"
12#include "SkColorData.h"
13#include "SkRasterPipeline.h"
14#include "SkReadBuffer.h"
15#include "SkString.h"
16#include "SkUnPreMultiply.h"
17#include "SkWriteBuffer.h"
18
19static const uint8_t gIdentityTable[] = {
20    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
21    0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
22    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
23    0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
24    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
25    0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
26    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
27    0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
28    0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
29    0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
30    0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
31    0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
32    0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
33    0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
34    0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
35    0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
36    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
37    0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
38    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
39    0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
40    0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
41    0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
42    0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
43    0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
44    0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
45    0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
46    0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
47    0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
48    0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
49    0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
50    0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
51    0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
52};
53
54class SkTable_ColorFilter : public SkColorFilter {
55public:
56    SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[],
57                        const uint8_t tableG[], const uint8_t tableB[]) {
58        fBitmap = nullptr;
59        fFlags = 0;
60
61        uint8_t* dst = fStorage;
62        if (tableA) {
63            memcpy(dst, tableA, 256);
64            dst += 256;
65            fFlags |= kA_Flag;
66        }
67        if (tableR) {
68            memcpy(dst, tableR, 256);
69            dst += 256;
70            fFlags |= kR_Flag;
71        }
72        if (tableG) {
73            memcpy(dst, tableG, 256);
74            dst += 256;
75            fFlags |= kG_Flag;
76        }
77        if (tableB) {
78            memcpy(dst, tableB, 256);
79            fFlags |= kB_Flag;
80        }
81    }
82
83    ~SkTable_ColorFilter() override { delete fBitmap; }
84
85    bool asComponentTable(SkBitmap* table) const override;
86    sk_sp<SkColorFilter> makeComposed(sk_sp<SkColorFilter> inner) const override;
87
88#if SK_SUPPORT_GPU
89    std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(
90            GrContext*, const GrColorSpaceInfo&) const override;
91#endif
92
93    SK_TO_STRING_OVERRIDE()
94
95    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTable_ColorFilter)
96
97    enum {
98        kA_Flag = 1 << 0,
99        kR_Flag = 1 << 1,
100        kG_Flag = 1 << 2,
101        kB_Flag = 1 << 3,
102    };
103
104    void onAppendStages(SkRasterPipeline* p, SkColorSpace*, SkArenaAlloc* alloc,
105                        bool shaderIsOpaque) const override {
106        const uint8_t *r = gIdentityTable,
107                      *g = gIdentityTable,
108                      *b = gIdentityTable,
109                      *a = gIdentityTable;
110        const uint8_t* ptr = fStorage;
111        if (fFlags & kA_Flag) { a = ptr; ptr += 256; }
112        if (fFlags & kR_Flag) { r = ptr; ptr += 256; }
113        if (fFlags & kG_Flag) { g = ptr; ptr += 256; }
114        if (fFlags & kB_Flag) { b = ptr;             }
115
116        if (!shaderIsOpaque) {
117            p->append(SkRasterPipeline::unpremul);
118        }
119
120        struct Tables { const uint8_t *r, *g, *b, *a; };
121        p->append(SkRasterPipeline::byte_tables, alloc->make<Tables>(Tables{r,g,b,a}));
122
123        bool definitelyOpaque = shaderIsOpaque && a[0xff] == 0xff;
124        if (!definitelyOpaque) {
125            p->append(SkRasterPipeline::premul);
126        }
127    }
128
129protected:
130    void flatten(SkWriteBuffer&) const override;
131
132private:
133    mutable const SkBitmap* fBitmap; // lazily allocated
134
135    uint8_t fStorage[256 * 4];
136    unsigned fFlags;
137
138    friend class SkTableColorFilter;
139
140    typedef SkColorFilter INHERITED;
141};
142
143#ifndef SK_IGNORE_TO_STRING
144void SkTable_ColorFilter::toString(SkString* str) const {
145    const uint8_t* table = fStorage;
146    const uint8_t* tableA = gIdentityTable;
147    const uint8_t* tableR = gIdentityTable;
148    const uint8_t* tableG = gIdentityTable;
149    const uint8_t* tableB = gIdentityTable;
150    if (fFlags & kA_Flag) {
151        tableA = table; table += 256;
152    }
153    if (fFlags & kR_Flag) {
154        tableR = table; table += 256;
155    }
156    if (fFlags & kG_Flag) {
157        tableG = table; table += 256;
158    }
159    if (fFlags & kB_Flag) {
160        tableB = table;
161    }
162
163    str->append("SkTable_ColorFilter (");
164
165    for (int i = 0; i < 256; ++i) {
166        str->appendf("%d: %d,%d,%d,%d\n",
167                     i, tableR[i], tableG[i], tableB[i], tableA[i]);
168    }
169
170    str->append(")");
171}
172#endif
173
174static const uint8_t gCountNibBits[] = {
175    0, 1, 1, 2,
176    1, 2, 2, 3,
177    1, 2, 2, 3,
178    2, 3, 3, 4
179};
180
181#include "SkPackBits.h"
182
183void SkTable_ColorFilter::flatten(SkWriteBuffer& buffer) const {
184    uint8_t storage[5*256];
185    int count = gCountNibBits[fFlags & 0xF];
186    size_t size = SkPackBits::Pack8(fStorage, count * 256, storage,
187                                    sizeof(storage));
188
189    buffer.write32(fFlags);
190    buffer.writeByteArray(storage, size);
191}
192
193sk_sp<SkFlattenable> SkTable_ColorFilter::CreateProc(SkReadBuffer& buffer) {
194    const int flags = buffer.read32();
195    const size_t count = gCountNibBits[flags & 0xF];
196    SkASSERT(count <= 4);
197
198    uint8_t packedStorage[5*256];
199    size_t packedSize = buffer.getArrayCount();
200    if (!buffer.validate(packedSize <= sizeof(packedStorage))) {
201        return nullptr;
202    }
203    if (!buffer.readByteArray(packedStorage, packedSize)) {
204        return nullptr;
205    }
206
207    uint8_t unpackedStorage[4*256];
208    size_t unpackedSize = SkPackBits::Unpack8(packedStorage, packedSize,
209                              unpackedStorage, sizeof(unpackedStorage));
210    // now check that we got the size we expected
211    if (!buffer.validate(unpackedSize == count*256)) {
212        return nullptr;
213    }
214
215    const uint8_t* a = nullptr;
216    const uint8_t* r = nullptr;
217    const uint8_t* g = nullptr;
218    const uint8_t* b = nullptr;
219    const uint8_t* ptr = unpackedStorage;
220
221    if (flags & kA_Flag) {
222        a = ptr;
223        ptr += 256;
224    }
225    if (flags & kR_Flag) {
226        r = ptr;
227        ptr += 256;
228    }
229    if (flags & kG_Flag) {
230        g = ptr;
231        ptr += 256;
232    }
233    if (flags & kB_Flag) {
234        b = ptr;
235        ptr += 256;
236    }
237    return SkTableColorFilter::MakeARGB(a, r, g, b);
238}
239
240bool SkTable_ColorFilter::asComponentTable(SkBitmap* table) const {
241    if (table) {
242        if (nullptr == fBitmap) {
243            SkBitmap* bmp = new SkBitmap;
244            bmp->allocPixels(SkImageInfo::MakeA8(256, 4));
245            uint8_t* bitmapPixels = bmp->getAddr8(0, 0);
246            int offset = 0;
247            static const unsigned kFlags[] = { kA_Flag, kR_Flag, kG_Flag, kB_Flag };
248
249            for (int x = 0; x < 4; ++x) {
250                if (!(fFlags & kFlags[x])) {
251                    memcpy(bitmapPixels, gIdentityTable, sizeof(gIdentityTable));
252                } else {
253                    memcpy(bitmapPixels, fStorage + offset, 256);
254                    offset += 256;
255                }
256                bitmapPixels += 256;
257            }
258            fBitmap = bmp;
259        }
260        *table = *fBitmap;
261    }
262    return true;
263}
264
265// Combines the two lookup tables so that making a lookup using res[] has
266// the same effect as making a lookup through inner[] then outer[].
267static void combine_tables(uint8_t res[256], const uint8_t outer[256], const uint8_t inner[256]) {
268    for (int i = 0; i < 256; i++) {
269        res[i] = outer[inner[i]];
270    }
271}
272
273sk_sp<SkColorFilter> SkTable_ColorFilter::makeComposed(sk_sp<SkColorFilter> innerFilter) const {
274    SkBitmap innerBM;
275    if (!innerFilter->asComponentTable(&innerBM)) {
276        return nullptr;
277    }
278
279    if (nullptr == innerBM.getPixels()) {
280        return nullptr;
281    }
282
283    const uint8_t* table = fStorage;
284    const uint8_t* tableA = gIdentityTable;
285    const uint8_t* tableR = gIdentityTable;
286    const uint8_t* tableG = gIdentityTable;
287    const uint8_t* tableB = gIdentityTable;
288    if (fFlags & kA_Flag) {
289        tableA = table; table += 256;
290    }
291    if (fFlags & kR_Flag) {
292        tableR = table; table += 256;
293    }
294    if (fFlags & kG_Flag) {
295        tableG = table; table += 256;
296    }
297    if (fFlags & kB_Flag) {
298        tableB = table;
299    }
300
301    uint8_t concatA[256];
302    uint8_t concatR[256];
303    uint8_t concatG[256];
304    uint8_t concatB[256];
305
306    combine_tables(concatA, tableA, innerBM.getAddr8(0, 0));
307    combine_tables(concatR, tableR, innerBM.getAddr8(0, 1));
308    combine_tables(concatG, tableG, innerBM.getAddr8(0, 2));
309    combine_tables(concatB, tableB, innerBM.getAddr8(0, 3));
310
311    return SkTableColorFilter::MakeARGB(concatA, concatR, concatG, concatB);
312}
313
314#if SK_SUPPORT_GPU
315
316#include "GrColorSpaceInfo.h"
317#include "GrContext.h"
318#include "GrContextPriv.h"
319#include "GrFragmentProcessor.h"
320#include "GrTextureStripAtlas.h"
321#include "SkGr.h"
322#include "glsl/GrGLSLFragmentProcessor.h"
323#include "glsl/GrGLSLFragmentShaderBuilder.h"
324#include "glsl/GrGLSLProgramDataManager.h"
325#include "glsl/GrGLSLUniformHandler.h"
326
327class ColorTableEffect : public GrFragmentProcessor {
328public:
329    static std::unique_ptr<GrFragmentProcessor> Make(GrContext* context, const SkBitmap& bitmap);
330
331    ~ColorTableEffect() override;
332
333    const char* name() const override { return "ColorTable"; }
334
335    const GrTextureStripAtlas* atlas() const { return fAtlas; }
336    int atlasRow() const { return fRow; }
337
338    std::unique_ptr<GrFragmentProcessor> clone() const override;
339
340private:
341    GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
342
343    void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
344
345    bool onIsEqual(const GrFragmentProcessor&) const override;
346
347    ColorTableEffect(sk_sp<GrTextureProxy> proxy, GrTextureStripAtlas* atlas, int row);
348
349    GR_DECLARE_FRAGMENT_PROCESSOR_TEST
350
351    TextureSampler fTextureSampler;
352    GrTextureStripAtlas* fAtlas;
353    int fRow;
354
355    typedef GrFragmentProcessor INHERITED;
356};
357
358class GLColorTableEffect : public GrGLSLFragmentProcessor {
359public:
360    void emitCode(EmitArgs&) override;
361
362    static void GenKey(const GrProcessor&, const GrShaderCaps&, GrProcessorKeyBuilder*) {}
363
364protected:
365    void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override;
366
367private:
368    UniformHandle fRGBAYValuesUni;
369    typedef GrGLSLFragmentProcessor INHERITED;
370};
371
372void GLColorTableEffect::onSetData(const GrGLSLProgramDataManager& pdm,
373                                   const GrFragmentProcessor& proc) {
374    // The textures are organized in a strip where the rows are ordered a, r, g, b.
375    float rgbaYValues[4];
376    const ColorTableEffect& cte = proc.cast<ColorTableEffect>();
377    if (cte.atlas()) {
378        SkScalar yDelta = cte.atlas()->getNormalizedTexelHeight();
379        rgbaYValues[3] = cte.atlas()->getYOffset(cte.atlasRow()) + SK_ScalarHalf * yDelta;
380        rgbaYValues[0] = rgbaYValues[3] + yDelta;
381        rgbaYValues[1] = rgbaYValues[0] + yDelta;
382        rgbaYValues[2] = rgbaYValues[1] + yDelta;
383    } else {
384        rgbaYValues[3] = 0.125;
385        rgbaYValues[0] = 0.375;
386        rgbaYValues[1] = 0.625;
387        rgbaYValues[2] = 0.875;
388    }
389    pdm.set4fv(fRGBAYValuesUni, 1, rgbaYValues);
390}
391
392void GLColorTableEffect::emitCode(EmitArgs& args) {
393    const char* yoffsets;
394    fRGBAYValuesUni = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kHalf4_GrSLType,
395                                                       "yoffsets", &yoffsets);
396    static const float kColorScaleFactor = 255.0f / 256.0f;
397    static const float kColorOffsetFactor = 1.0f / 512.0f;
398    GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
399    if (nullptr == args.fInputColor) {
400        // the input color is solid white (all ones).
401        static const float kMaxValue = kColorScaleFactor + kColorOffsetFactor;
402        fragBuilder->codeAppendf("\t\thalf4 coord = half4(%f, %f, %f, %f);\n",
403                                 kMaxValue, kMaxValue, kMaxValue, kMaxValue);
404
405    } else {
406        fragBuilder->codeAppendf("\t\thalf nonZeroAlpha = max(%s.a, .0001);\n", args.fInputColor);
407        fragBuilder->codeAppendf("\t\thalf4 coord = half4(%s.rgb / nonZeroAlpha, nonZeroAlpha);\n",
408                                 args.fInputColor);
409        fragBuilder->codeAppendf("\t\tcoord = coord * %f + half4(%f, %f, %f, %f);\n",
410                                 kColorScaleFactor,
411                                 kColorOffsetFactor, kColorOffsetFactor,
412                                 kColorOffsetFactor, kColorOffsetFactor);
413    }
414
415    SkString coord;
416
417    fragBuilder->codeAppendf("\t\t%s.a = ", args.fOutputColor);
418    coord.printf("half2(coord.a, %s.a)", yoffsets);
419    fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
420    fragBuilder->codeAppend(".a;\n");
421
422    fragBuilder->codeAppendf("\t\t%s.r = ", args.fOutputColor);
423    coord.printf("half2(coord.r, %s.r)", yoffsets);
424    fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
425    fragBuilder->codeAppend(".a;\n");
426
427    fragBuilder->codeAppendf("\t\t%s.g = ", args.fOutputColor);
428    coord.printf("half2(coord.g, %s.g)", yoffsets);
429    fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
430    fragBuilder->codeAppend(".a;\n");
431
432    fragBuilder->codeAppendf("\t\t%s.b = ", args.fOutputColor);
433    coord.printf("half2(coord.b, %s.b)", yoffsets);
434    fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
435    fragBuilder->codeAppend(".a;\n");
436
437    fragBuilder->codeAppendf("\t\t%s.rgb *= %s.a;\n", args.fOutputColor, args.fOutputColor);
438}
439
440///////////////////////////////////////////////////////////////////////////////
441std::unique_ptr<GrFragmentProcessor> ColorTableEffect::Make(GrContext* context,
442                                                            const SkBitmap& bitmap) {
443    GrTextureStripAtlas::Desc desc;
444    desc.fWidth  = bitmap.width();
445    desc.fHeight = 128;
446    desc.fRowHeight = bitmap.height();
447
448    // TODO: this seems a bit heavy handed (passing a GrContext as part of the desc)
449    desc.fContext = context;
450    desc.fConfig = SkImageInfo2GrPixelConfig(bitmap.info(), *context->caps());
451    GrTextureStripAtlas* atlas = GrTextureStripAtlas::GetAtlas(desc);
452    int row = atlas->lockRow(bitmap);
453    sk_sp<GrTextureProxy> proxy;
454    if (-1 == row) {
455        atlas = nullptr;
456
457        proxy = GrMakeCachedBitmapProxy(context->contextPriv().proxyProvider(), bitmap);
458    } else {
459        proxy = atlas->asTextureProxyRef();
460    }
461
462    if (!proxy) {
463        return nullptr;
464    }
465
466    return std::unique_ptr<GrFragmentProcessor>(new ColorTableEffect(std::move(proxy), atlas, row));
467}
468
469ColorTableEffect::ColorTableEffect(sk_sp<GrTextureProxy> proxy, GrTextureStripAtlas* atlas, int row)
470        : INHERITED(kColorTableEffect_ClassID,
471                    kNone_OptimizationFlags)  // Not bothering with table-specific optimizations.
472        , fTextureSampler(std::move(proxy))
473        , fAtlas(atlas)
474        , fRow(row) {
475    this->addTextureSampler(&fTextureSampler);
476}
477
478ColorTableEffect::~ColorTableEffect() {
479    if (fAtlas) {
480        fAtlas->unlockRow(fRow);
481    }
482}
483
484std::unique_ptr<GrFragmentProcessor> ColorTableEffect::clone() const {
485    fAtlas->lockRow(fRow);
486    return std::unique_ptr<GrFragmentProcessor>(
487            new ColorTableEffect(sk_ref_sp(fTextureSampler.proxy()), fAtlas, fRow));
488}
489
490void ColorTableEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
491                                             GrProcessorKeyBuilder* b) const {
492    GLColorTableEffect::GenKey(*this, caps, b);
493}
494
495GrGLSLFragmentProcessor* ColorTableEffect::onCreateGLSLInstance() const {
496    return new GLColorTableEffect;
497}
498
499bool ColorTableEffect::onIsEqual(const GrFragmentProcessor& other) const {
500    // For non-atlased instances, the texture (compared by base class) is sufficient to
501    // differentiate different tables. For atlased instances we ensure they are using the
502    // same row.
503    const ColorTableEffect& that = other.cast<ColorTableEffect>();
504    SkASSERT(SkToBool(fAtlas) == SkToBool(that.fAtlas));
505    // Ok to always do this comparison since both would be -1 if non-atlased.
506    return fRow == that.fRow;
507}
508
509///////////////////////////////////////////////////////////////////////////////
510
511GR_DEFINE_FRAGMENT_PROCESSOR_TEST(ColorTableEffect);
512
513#if GR_TEST_UTILS
514std::unique_ptr<GrFragmentProcessor> ColorTableEffect::TestCreate(GrProcessorTestData* d) {
515    int flags = 0;
516    uint8_t luts[256][4];
517    do {
518        for (int i = 0; i < 4; ++i) {
519            flags |= d->fRandom->nextBool() ? (1  << i): 0;
520        }
521    } while (!flags);
522    for (int i = 0; i < 4; ++i) {
523        if (flags & (1 << i)) {
524            for (int j = 0; j < 256; ++j) {
525                luts[j][i] = SkToU8(d->fRandom->nextBits(8));
526            }
527        }
528    }
529    auto filter(SkTableColorFilter::MakeARGB(
530        (flags & (1 << 0)) ? luts[0] : nullptr,
531        (flags & (1 << 1)) ? luts[1] : nullptr,
532        (flags & (1 << 2)) ? luts[2] : nullptr,
533        (flags & (1 << 3)) ? luts[3] : nullptr
534    ));
535    sk_sp<SkColorSpace> colorSpace = GrTest::TestColorSpace(d->fRandom);
536    auto fp = filter->asFragmentProcessor(
537            d->context(), GrColorSpaceInfo(std::move(colorSpace), kRGBA_8888_GrPixelConfig));
538    SkASSERT(fp);
539    return fp;
540}
541#endif
542
543std::unique_ptr<GrFragmentProcessor> SkTable_ColorFilter::asFragmentProcessor(
544        GrContext* context, const GrColorSpaceInfo&) const {
545    SkBitmap bitmap;
546    this->asComponentTable(&bitmap);
547
548    return ColorTableEffect::Make(context, bitmap);
549}
550
551#endif // SK_SUPPORT_GPU
552
553///////////////////////////////////////////////////////////////////////////////
554
555sk_sp<SkColorFilter> SkTableColorFilter::Make(const uint8_t table[256]) {
556    return sk_make_sp<SkTable_ColorFilter>(table, table, table, table);
557}
558
559sk_sp<SkColorFilter> SkTableColorFilter::MakeARGB(const uint8_t tableA[256],
560                                                  const uint8_t tableR[256],
561                                                  const uint8_t tableG[256],
562                                                  const uint8_t tableB[256]) {
563    return sk_make_sp<SkTable_ColorFilter>(tableA, tableR, tableG, tableB);
564}
565
566SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkTableColorFilter)
567    SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTable_ColorFilter)
568SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
569