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 "tests/Test.h"
9
10 #include "include/gpu/GrDirectContext.h"
11 #include "src/gpu/GrBitmapTextureMaker.h"
12 #include "src/gpu/GrClip.h"
13 #include "src/gpu/GrDirectContextPriv.h"
14 #include "src/gpu/GrGpuResource.h"
15 #include "src/gpu/GrImageInfo.h"
16 #include "src/gpu/GrMemoryPool.h"
17 #include "src/gpu/GrProxyProvider.h"
18 #include "src/gpu/GrRenderTargetContext.h"
19 #include "src/gpu/GrRenderTargetContextPriv.h"
20 #include "src/gpu/GrResourceProvider.h"
21 #include "src/gpu/glsl/GrGLSLFragmentProcessor.h"
22 #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
23 #include "src/gpu/ops/GrFillRectOp.h"
24 #include "src/gpu/ops/GrMeshDrawOp.h"
25 #include "tests/TestUtils.h"
26 #include <atomic>
27 #include <random>
28
29 namespace {
30 class TestOp : public GrMeshDrawOp {
31 public:
32 DEFINE_OP_CLASS_ID
Make(GrRecordingContext * rContext,std::unique_ptr<GrFragmentProcessor> fp)33 static GrOp::Owner Make(GrRecordingContext* rContext,
34 std::unique_ptr<GrFragmentProcessor> fp) {
35 return GrOp::Make<TestOp>(rContext, std::move(fp));
36 }
37
name() const38 const char* name() const override { return "TestOp"; }
39
visitProxies(const VisitProxyFunc & func) const40 void visitProxies(const VisitProxyFunc& func) const override {
41 fProcessors.visitProxies(func);
42 }
43
fixedFunctionFlags() const44 FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
45
finalize(const GrCaps & caps,const GrAppliedClip * clip,bool hasMixedSampledCoverage,GrClampType clampType)46 GrProcessorSet::Analysis finalize(
47 const GrCaps& caps, const GrAppliedClip* clip, bool hasMixedSampledCoverage,
48 GrClampType clampType) override {
49 static constexpr GrProcessorAnalysisColor kUnknownColor;
50 SkPMColor4f overrideColor;
51 return fProcessors.finalize(
52 kUnknownColor, GrProcessorAnalysisCoverage::kNone, clip,
53 &GrUserStencilSettings::kUnused, hasMixedSampledCoverage, caps, clampType,
54 &overrideColor);
55 }
56
57 private:
58 friend class ::GrOp; // for ctor
59
TestOp(std::unique_ptr<GrFragmentProcessor> fp)60 TestOp(std::unique_ptr<GrFragmentProcessor> fp)
61 : INHERITED(ClassID()), fProcessors(std::move(fp)) {
62 this->setBounds(SkRect::MakeWH(100, 100), HasAABloat::kNo, IsHairline::kNo);
63 }
64
programInfo()65 GrProgramInfo* programInfo() override { return nullptr; }
onCreateProgramInfo(const GrCaps *,SkArenaAlloc *,const GrSurfaceProxyView * writeView,GrAppliedClip &&,const GrXferProcessor::DstProxyView &,GrXferBarrierFlags renderPassXferBarriers)66 void onCreateProgramInfo(const GrCaps*,
67 SkArenaAlloc*,
68 const GrSurfaceProxyView* writeView,
69 GrAppliedClip&&,
70 const GrXferProcessor::DstProxyView&,
71 GrXferBarrierFlags renderPassXferBarriers) override {}
onPrePrepareDraws(GrRecordingContext *,const GrSurfaceProxyView * writeView,GrAppliedClip *,const GrXferProcessor::DstProxyView &,GrXferBarrierFlags renderPassXferBarriers)72 void onPrePrepareDraws(GrRecordingContext*,
73 const GrSurfaceProxyView* writeView,
74 GrAppliedClip*,
75 const GrXferProcessor::DstProxyView&,
76 GrXferBarrierFlags renderPassXferBarriers) override {}
onPrepareDraws(Target * target)77 void onPrepareDraws(Target* target) override { return; }
onExecute(GrOpFlushState *,const SkRect &)78 void onExecute(GrOpFlushState*, const SkRect&) override { return; }
79
80 GrProcessorSet fProcessors;
81
82 using INHERITED = GrMeshDrawOp;
83 };
84
85 /**
86 * FP used to test ref counts on owned GrGpuResources. Can also be a parent FP to test counts
87 * of resources owned by child FPs.
88 */
89 class TestFP : public GrFragmentProcessor {
90 public:
Make(std::unique_ptr<GrFragmentProcessor> child)91 static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> child) {
92 return std::unique_ptr<GrFragmentProcessor>(new TestFP(std::move(child)));
93 }
Make(const SkTArray<GrSurfaceProxyView> & views)94 static std::unique_ptr<GrFragmentProcessor> Make(const SkTArray<GrSurfaceProxyView>& views) {
95 return std::unique_ptr<GrFragmentProcessor>(new TestFP(views));
96 }
97
name() const98 const char* name() const override { return "test"; }
99
onGetGLSLProcessorKey(const GrShaderCaps &,GrProcessorKeyBuilder * b) const100 void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const override {
101 static std::atomic<int32_t> nextKey{0};
102 b->add32(nextKey++);
103 }
104
clone() const105 std::unique_ptr<GrFragmentProcessor> clone() const override {
106 return std::unique_ptr<GrFragmentProcessor>(new TestFP(*this));
107 }
108
109 private:
TestFP(const SkTArray<GrSurfaceProxyView> & views)110 TestFP(const SkTArray<GrSurfaceProxyView>& views)
111 : INHERITED(kTestFP_ClassID, kNone_OptimizationFlags) {
112 for (const GrSurfaceProxyView& view : views) {
113 this->registerChild(GrTextureEffect::Make(view, kUnknown_SkAlphaType));
114 }
115 }
116
TestFP(std::unique_ptr<GrFragmentProcessor> child)117 TestFP(std::unique_ptr<GrFragmentProcessor> child)
118 : INHERITED(kTestFP_ClassID, kNone_OptimizationFlags) {
119 this->registerChild(std::move(child));
120 }
121
TestFP(const TestFP & that)122 explicit TestFP(const TestFP& that) : INHERITED(kTestFP_ClassID, that.optimizationFlags()) {
123 this->cloneAndRegisterAllChildProcessors(that);
124 }
125
onCreateGLSLInstance() const126 GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
127 class TestGLSLFP : public GrGLSLFragmentProcessor {
128 public:
129 TestGLSLFP() {}
130 void emitCode(EmitArgs& args) override {
131 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
132 fragBuilder->codeAppendf("%s = %s;", args.fOutputColor, args.fInputColor);
133 }
134
135 private:
136 };
137 return new TestGLSLFP();
138 }
139
onIsEqual(const GrFragmentProcessor &) const140 bool onIsEqual(const GrFragmentProcessor&) const override { return false; }
141
142 using INHERITED = GrFragmentProcessor;
143 };
144 } // namespace
145
DEF_GPUTEST_FOR_ALL_CONTEXTS(ProcessorRefTest,reporter,ctxInfo)146 DEF_GPUTEST_FOR_ALL_CONTEXTS(ProcessorRefTest, reporter, ctxInfo) {
147 auto context = ctxInfo.directContext();
148 GrProxyProvider* proxyProvider = context->priv().proxyProvider();
149
150 static constexpr SkISize kDims = {10, 10};
151
152 const GrBackendFormat format =
153 context->priv().caps()->getDefaultBackendFormat(GrColorType::kRGBA_8888,
154 GrRenderable::kNo);
155 GrSwizzle swizzle = context->priv().caps()->getReadSwizzle(format, GrColorType::kRGBA_8888);
156
157 for (bool makeClone : {false, true}) {
158 for (int parentCnt = 0; parentCnt < 2; parentCnt++) {
159 auto renderTargetContext = GrRenderTargetContext::Make(
160 context, GrColorType::kRGBA_8888, nullptr, SkBackingFit::kApprox, {1, 1});
161 {
162 sk_sp<GrTextureProxy> proxy = proxyProvider->createProxy(
163 format, kDims, GrRenderable::kNo, 1, GrMipmapped::kNo, SkBackingFit::kExact,
164 SkBudgeted::kYes, GrProtected::kNo);
165
166 {
167 SkTArray<GrSurfaceProxyView> views;
168 views.push_back({proxy, kTopLeft_GrSurfaceOrigin, swizzle});
169 auto fp = TestFP::Make(std::move(views));
170 for (int i = 0; i < parentCnt; ++i) {
171 fp = TestFP::Make(std::move(fp));
172 }
173 std::unique_ptr<GrFragmentProcessor> clone;
174 if (makeClone) {
175 clone = fp->clone();
176 }
177 GrOp::Owner op = TestOp::Make(context, std::move(fp));
178 renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
179 if (clone) {
180 op = TestOp::Make(context, std::move(clone));
181 renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
182 }
183 }
184
185 // If the fp is cloned the number of refs should increase by one (for the clone)
186 int expectedProxyRefs = makeClone ? 3 : 2;
187
188 CheckSingleThreadedProxyRefs(reporter, proxy.get(), expectedProxyRefs, -1);
189
190 context->flushAndSubmit();
191
192 // just one from the 'proxy' sk_sp
193 CheckSingleThreadedProxyRefs(reporter, proxy.get(), 1, 1);
194 }
195 }
196 }
197 }
198
199 #include "tools/flags/CommandLineFlags.h"
200 static DEFINE_bool(randomProcessorTest, false,
201 "Use non-deterministic seed for random processor tests?");
202 static DEFINE_int(processorSeed, 0,
203 "Use specific seed for processor tests. Overridden by --randomProcessorTest.");
204
205 #if GR_TEST_UTILS
206
input_texel_color(int i,int j,SkScalar delta)207 static GrColor input_texel_color(int i, int j, SkScalar delta) {
208 // Delta must be less than 0.5 to prevent over/underflow issues with the input color
209 SkASSERT(delta <= 0.5);
210
211 SkColor color = SkColorSetARGB((uint8_t)(i & 0xFF),
212 (uint8_t)(j & 0xFF),
213 (uint8_t)((i + j) & 0xFF),
214 (uint8_t)((2 * j - i) & 0xFF));
215 SkColor4f color4f = SkColor4f::FromColor(color);
216 // We only apply delta to the r,g, and b channels. This is because we're using this
217 // to test the canTweakAlphaForCoverage() optimization. A processor is allowed
218 // to use the input color's alpha in its calculation and report this optimization.
219 for (int i = 0; i < 3; i++) {
220 if (color4f[i] > 0.5) {
221 color4f[i] -= delta;
222 } else {
223 color4f[i] += delta;
224 }
225 }
226 return color4f.premul().toBytes_RGBA();
227 }
228
test_draw_op(GrRecordingContext * rContext,GrRenderTargetContext * rtc,std::unique_ptr<GrFragmentProcessor> fp)229 void test_draw_op(GrRecordingContext* rContext,
230 GrRenderTargetContext* rtc,
231 std::unique_ptr<GrFragmentProcessor> fp) {
232 GrPaint paint;
233 paint.setColorFragmentProcessor(std::move(fp));
234 paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
235
236 auto op = GrFillRectOp::MakeNonAARect(rContext, std::move(paint), SkMatrix::I(),
237 SkRect::MakeWH(rtc->width(), rtc->height()));
238 rtc->priv().testingOnly_addDrawOp(std::move(op));
239 }
240
241 // The output buffer must be the same size as the render-target context.
render_fp(GrDirectContext * dContext,GrRenderTargetContext * rtc,std::unique_ptr<GrFragmentProcessor> fp,GrColor * outBuffer)242 void render_fp(GrDirectContext* dContext,
243 GrRenderTargetContext* rtc,
244 std::unique_ptr<GrFragmentProcessor> fp,
245 GrColor* outBuffer) {
246 test_draw_op(dContext, rtc, std::move(fp));
247 std::fill_n(outBuffer, rtc->width() * rtc->height(), 0);
248 rtc->readPixels(dContext, SkImageInfo::Make(rtc->width(), rtc->height(), kRGBA_8888_SkColorType,
249 kPremul_SkAlphaType),
250 outBuffer, /*rowBytes=*/0, /*srcPt=*/{0, 0});
251 }
252
253 // This class is responsible for reproducibly generating a random fragment processor.
254 // An identical randomly-designed FP can be generated as many times as needed.
255 class TestFPGenerator {
256 public:
257 TestFPGenerator() = delete;
TestFPGenerator(GrDirectContext * context,GrResourceProvider * resourceProvider)258 TestFPGenerator(GrDirectContext* context, GrResourceProvider* resourceProvider)
259 : fContext(context)
260 , fResourceProvider(resourceProvider)
261 , fInitialSeed(synthesizeInitialSeed())
262 , fRandomSeed(fInitialSeed) {}
263
initialSeed()264 uint32_t initialSeed() { return fInitialSeed; }
265
init()266 bool init() {
267 // Initializes the two test texture proxies that are available to the FP test factories.
268 SkRandom random{fRandomSeed};
269 static constexpr int kTestTextureSize = 256;
270
271 {
272 // Put premul data into the RGBA texture that the test FPs can optionally use.
273 GrColor* rgbaData = new GrColor[kTestTextureSize * kTestTextureSize];
274 for (int y = 0; y < kTestTextureSize; ++y) {
275 for (int x = 0; x < kTestTextureSize; ++x) {
276 rgbaData[kTestTextureSize * y + x] = input_texel_color(
277 random.nextULessThan(256), random.nextULessThan(256), 0.0f);
278 }
279 }
280
281 SkImageInfo ii = SkImageInfo::Make(kTestTextureSize, kTestTextureSize,
282 kRGBA_8888_SkColorType, kPremul_SkAlphaType);
283 SkBitmap bitmap;
284 bitmap.installPixels(
285 ii, rgbaData, ii.minRowBytes(),
286 [](void* addr, void* context) { delete[](GrColor*) addr; }, nullptr);
287 bitmap.setImmutable();
288 GrBitmapTextureMaker maker(fContext, bitmap,
289 GrImageTexGenPolicy::kNew_Uncached_Budgeted);
290 GrSurfaceProxyView view = maker.view(GrMipmapped::kNo);
291 if (!view.proxy() || !view.proxy()->instantiate(fResourceProvider)) {
292 SkDebugf("Unable to instantiate RGBA8888 test texture.");
293 return false;
294 }
295 fTestViews[0] = GrProcessorTestData::ViewInfo{view, GrColorType::kRGBA_8888,
296 kPremul_SkAlphaType};
297 }
298
299 {
300 // Put random values into the alpha texture that the test FPs can optionally use.
301 uint8_t* alphaData = new uint8_t[kTestTextureSize * kTestTextureSize];
302 for (int y = 0; y < kTestTextureSize; ++y) {
303 for (int x = 0; x < kTestTextureSize; ++x) {
304 alphaData[kTestTextureSize * y + x] = random.nextULessThan(256);
305 }
306 }
307
308 SkImageInfo ii = SkImageInfo::Make(kTestTextureSize, kTestTextureSize,
309 kAlpha_8_SkColorType, kPremul_SkAlphaType);
310 SkBitmap bitmap;
311 bitmap.installPixels(
312 ii, alphaData, ii.minRowBytes(),
313 [](void* addr, void* context) { delete[](uint8_t*) addr; }, nullptr);
314 bitmap.setImmutable();
315 GrBitmapTextureMaker maker(fContext, bitmap,
316 GrImageTexGenPolicy::kNew_Uncached_Budgeted);
317 GrSurfaceProxyView view = maker.view(GrMipmapped::kNo);
318 if (!view.proxy() || !view.proxy()->instantiate(fResourceProvider)) {
319 SkDebugf("Unable to instantiate A8 test texture.");
320 return false;
321 }
322 fTestViews[1] = GrProcessorTestData::ViewInfo{view, GrColorType::kAlpha_8,
323 kPremul_SkAlphaType};
324 }
325
326 return true;
327 }
328
reroll()329 void reroll() {
330 // Feed our current random seed into SkRandom to generate a new seed.
331 SkRandom random{fRandomSeed};
332 fRandomSeed = random.nextU();
333 }
334
make(int type,int randomTreeDepth,std::unique_ptr<GrFragmentProcessor> inputFP)335 std::unique_ptr<GrFragmentProcessor> make(int type, int randomTreeDepth,
336 std::unique_ptr<GrFragmentProcessor> inputFP) {
337 // This will generate the exact same randomized FP (of each requested type) each time
338 // it's called. Call `reroll` to get a different FP.
339 SkRandom random{fRandomSeed};
340 GrProcessorTestData testData{&random, fContext, randomTreeDepth,
341 SK_ARRAY_COUNT(fTestViews), fTestViews,
342 std::move(inputFP)};
343 return GrFragmentProcessorTestFactory::MakeIdx(type, &testData);
344 }
345
make(int type,int randomTreeDepth,GrSurfaceProxyView view,SkAlphaType alpha=kPremul_SkAlphaType)346 std::unique_ptr<GrFragmentProcessor> make(int type, int randomTreeDepth,
347 GrSurfaceProxyView view,
348 SkAlphaType alpha = kPremul_SkAlphaType) {
349 return make(type, randomTreeDepth, GrTextureEffect::Make(view, alpha));
350 }
351
352 private:
synthesizeInitialSeed()353 static uint32_t synthesizeInitialSeed() {
354 if (FLAGS_randomProcessorTest) {
355 std::random_device rd;
356 return rd();
357 } else {
358 return FLAGS_processorSeed;
359 }
360 }
361
362 GrDirectContext* fContext; // owned by caller
363 GrResourceProvider* fResourceProvider; // owned by caller
364 const uint32_t fInitialSeed;
365 uint32_t fRandomSeed;
366 GrProcessorTestData::ViewInfo fTestViews[2];
367 };
368
369 // Creates an array of color values from input_texel_color(), to be used as an input texture.
make_input_pixels(int width,int height,SkScalar delta)370 std::vector<GrColor> make_input_pixels(int width, int height, SkScalar delta) {
371 std::vector<GrColor> pixel(width * height);
372 for (int y = 0; y < width; ++y) {
373 for (int x = 0; x < height; ++x) {
374 pixel[width * y + x] = input_texel_color(x, y, delta);
375 }
376 }
377
378 return pixel;
379 }
380
381 // Creates a texture of premul colors used as the output of the fragment processor that precedes
382 // the fragment processor under test. An array of W*H colors are passed in as the texture data.
make_input_texture(GrRecordingContext * context,int width,int height,GrColor * pixel)383 GrSurfaceProxyView make_input_texture(GrRecordingContext* context,
384 int width, int height, GrColor* pixel) {
385 SkImageInfo ii = SkImageInfo::Make(width, height, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
386 SkBitmap bitmap;
387 bitmap.installPixels(ii, pixel, ii.minRowBytes());
388 bitmap.setImmutable();
389 GrBitmapTextureMaker maker(context, bitmap, GrImageTexGenPolicy::kNew_Uncached_Budgeted);
390 return maker.view(GrMipmapped::kNo);
391 }
392
393 // We tag logged data as unpremul to avoid conversion when encoding as PNG. The input texture
394 // actually contains unpremul data. Also, even though we made the result data by rendering into
395 // a "unpremul" GrRenderTargetContext, our input texture is unpremul and outside of the random
396 // effect configuration, we didn't do anything to ensure the output is actually premul. We just
397 // don't currently allow kUnpremul GrRenderTargetContexts.
398 static constexpr auto kLogAlphaType = kUnpremul_SkAlphaType;
399
log_pixels(GrColor * pixels,int widthHeight,SkString * dst)400 bool log_pixels(GrColor* pixels, int widthHeight, SkString* dst) {
401 SkImageInfo info =
402 SkImageInfo::Make(widthHeight, widthHeight, kRGBA_8888_SkColorType, kLogAlphaType);
403 SkBitmap bmp;
404 bmp.installPixels(info, pixels, widthHeight * sizeof(GrColor));
405 return BipmapToBase64DataURI(bmp, dst);
406 }
407
log_texture_view(GrDirectContext * dContext,GrSurfaceProxyView src,SkString * dst)408 bool log_texture_view(GrDirectContext* dContext, GrSurfaceProxyView src, SkString* dst) {
409 SkImageInfo ii = SkImageInfo::Make(src.proxy()->dimensions(), kRGBA_8888_SkColorType,
410 kLogAlphaType);
411
412 auto sContext = GrSurfaceContext::Make(dContext, std::move(src), GrColorType::kRGBA_8888,
413 kLogAlphaType, nullptr);
414 SkBitmap bm;
415 SkAssertResult(bm.tryAllocPixels(ii));
416 SkAssertResult(sContext->readPixels(dContext, ii, bm.getPixels(), bm.rowBytes(), {0, 0}));
417 return BipmapToBase64DataURI(bm, dst);
418 }
419
fuzzy_color_equals(const SkPMColor4f & c1,const SkPMColor4f & c2)420 bool fuzzy_color_equals(const SkPMColor4f& c1, const SkPMColor4f& c2) {
421 // With the loss of precision of rendering into 32-bit color, then estimating the FP's output
422 // from that, it is not uncommon for a valid output to differ from estimate by up to 0.01
423 // (really 1/128 ~ .0078, but frequently floating point issues make that tolerance a little
424 // too unforgiving).
425 static constexpr SkScalar kTolerance = 0.01f;
426 for (int i = 0; i < 4; i++) {
427 if (!SkScalarNearlyEqual(c1[i], c2[i], kTolerance)) {
428 return false;
429 }
430 }
431 return true;
432 }
433
434 // Given three input colors (color preceding the FP being tested) provided to the FP at the same
435 // local coord and the three corresponding FP outputs, this ensures that either:
436 // out[0] = fp * in[0].a, out[1] = fp * in[1].a, and out[2] = fp * in[2].a
437 // where fp is the pre-modulated color that should not be changing across frames (FP's state doesn't
438 // change), OR:
439 // out[0] = fp * in[0], out[1] = fp * in[1], and out[2] = fp * in[2]
440 // (per-channel modulation instead of modulation by just the alpha channel)
441 // It does this by estimating the pre-modulated fp color from one of the input/output pairs and
442 // confirms the conditions hold for the other two pairs.
443 // It is required that the three input colors have the same alpha as fp is allowed to be a function
444 // of the input alpha (but not r, g, or b).
legal_modulation(const GrColor in[3],const GrColor out[3])445 bool legal_modulation(const GrColor in[3], const GrColor out[3]) {
446 // Convert to floating point, which is the number space the FP operates in (more or less)
447 SkPMColor4f inf[3], outf[3];
448 for (int i = 0; i < 3; ++i) {
449 inf[i] = SkPMColor4f::FromBytes_RGBA(in[i]);
450 outf[i] = SkPMColor4f::FromBytes_RGBA(out[i]);
451 }
452 // This test is only valid if all the input alphas are the same.
453 SkASSERT(inf[0].fA == inf[1].fA && inf[1].fA == inf[2].fA);
454
455 // Reconstruct the output of the FP before the shader modulated its color with the input value.
456 // When the original input is very small, it may cause the final output color to round
457 // to 0, in which case we estimate the pre-modulated color using one of the stepped frames that
458 // will then have a guaranteed larger channel value (since the offset will be added to it).
459 SkPMColor4f fpPreColorModulation = {0,0,0,0};
460 SkPMColor4f fpPreAlphaModulation = {0,0,0,0};
461 for (int i = 0; i < 4; i++) {
462 // Use the most stepped up frame
463 int maxInIdx = inf[0][i] > inf[1][i] ? 0 : 1;
464 maxInIdx = inf[maxInIdx][i] > inf[2][i] ? maxInIdx : 2;
465 const SkPMColor4f& in = inf[maxInIdx];
466 const SkPMColor4f& out = outf[maxInIdx];
467 if (in[i] > 0) {
468 fpPreColorModulation[i] = out[i] / in[i];
469 }
470 if (in[3] > 0) {
471 fpPreAlphaModulation[i] = out[i] / in[3];
472 }
473 }
474
475 // With reconstructed pre-modulated FP output, derive the expected value of fp * input for each
476 // of the transformed input colors.
477 SkPMColor4f expectedForAlphaModulation[3];
478 SkPMColor4f expectedForColorModulation[3];
479 for (int i = 0; i < 3; ++i) {
480 expectedForAlphaModulation[i] = fpPreAlphaModulation * inf[i].fA;
481 expectedForColorModulation[i] = fpPreColorModulation * inf[i];
482 // If the input alpha is 0 then the other channels should also be zero
483 // since the color is assumed to be premul. Modulating zeros by anything
484 // should produce zeros.
485 if (inf[i].fA == 0) {
486 SkASSERT(inf[i].fR == 0 && inf[i].fG == 0 && inf[i].fB == 0);
487 expectedForColorModulation[i] = expectedForAlphaModulation[i] = {0, 0, 0, 0};
488 }
489 }
490
491 bool isLegalColorModulation = fuzzy_color_equals(outf[0], expectedForColorModulation[0]) &&
492 fuzzy_color_equals(outf[1], expectedForColorModulation[1]) &&
493 fuzzy_color_equals(outf[2], expectedForColorModulation[2]);
494
495 bool isLegalAlphaModulation = fuzzy_color_equals(outf[0], expectedForAlphaModulation[0]) &&
496 fuzzy_color_equals(outf[1], expectedForAlphaModulation[1]) &&
497 fuzzy_color_equals(outf[2], expectedForAlphaModulation[2]);
498
499 // This can be enabled to print the values that caused this check to fail.
500 if (0 && !isLegalColorModulation && !isLegalAlphaModulation) {
501 SkDebugf("Color modulation test\n\timplied mod color: (%.03f, %.03f, %.03f, %.03f)\n",
502 fpPreColorModulation[0],
503 fpPreColorModulation[1],
504 fpPreColorModulation[2],
505 fpPreColorModulation[3]);
506 for (int i = 0; i < 3; ++i) {
507 SkDebugf("\t(%.03f, %.03f, %.03f, %.03f) -> "
508 "(%.03f, %.03f, %.03f, %.03f) | "
509 "(%.03f, %.03f, %.03f, %.03f), ok: %d\n",
510 inf[i].fR, inf[i].fG, inf[i].fB, inf[i].fA,
511 outf[i].fR, outf[i].fG, outf[i].fB, outf[i].fA,
512 expectedForColorModulation[i].fR, expectedForColorModulation[i].fG,
513 expectedForColorModulation[i].fB, expectedForColorModulation[i].fA,
514 fuzzy_color_equals(outf[i], expectedForColorModulation[i]));
515 }
516 SkDebugf("Alpha modulation test\n\timplied mod color: (%.03f, %.03f, %.03f, %.03f)\n",
517 fpPreAlphaModulation[0],
518 fpPreAlphaModulation[1],
519 fpPreAlphaModulation[2],
520 fpPreAlphaModulation[3]);
521 for (int i = 0; i < 3; ++i) {
522 SkDebugf("\t(%.03f, %.03f, %.03f, %.03f) -> "
523 "(%.03f, %.03f, %.03f, %.03f) | "
524 "(%.03f, %.03f, %.03f, %.03f), ok: %d\n",
525 inf[i].fR, inf[i].fG, inf[i].fB, inf[i].fA,
526 outf[i].fR, outf[i].fG, outf[i].fB, outf[i].fA,
527 expectedForAlphaModulation[i].fR, expectedForAlphaModulation[i].fG,
528 expectedForAlphaModulation[i].fB, expectedForAlphaModulation[i].fA,
529 fuzzy_color_equals(outf[i], expectedForAlphaModulation[i]));
530 }
531 }
532 return isLegalColorModulation || isLegalAlphaModulation;
533 }
534
DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(ProcessorOptimizationValidationTest,reporter,ctxInfo)535 DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(ProcessorOptimizationValidationTest, reporter, ctxInfo) {
536 GrDirectContext* context = ctxInfo.directContext();
537 GrResourceProvider* resourceProvider = context->priv().resourceProvider();
538 using FPFactory = GrFragmentProcessorTestFactory;
539
540 TestFPGenerator fpGenerator{context, resourceProvider};
541 if (!fpGenerator.init()) {
542 ERRORF(reporter, "Could not initialize TestFPGenerator");
543 return;
544 }
545
546 // Make the destination context for the test.
547 static constexpr int kRenderSize = 256;
548 auto rtc = GrRenderTargetContext::Make(
549 context, GrColorType::kRGBA_8888, nullptr, SkBackingFit::kExact,
550 {kRenderSize, kRenderSize});
551
552 // Coverage optimization uses three frames with a linearly transformed input texture. The first
553 // frame has no offset, second frames add .2 and .4, which should then be present as a fixed
554 // difference between the frame outputs if the FP is properly following the modulation
555 // requirements of the coverage optimization.
556 static constexpr SkScalar kInputDelta = 0.2f;
557 std::vector<GrColor> inputPixels1 = make_input_pixels(kRenderSize, kRenderSize, 0.0f);
558 std::vector<GrColor> inputPixels2 =
559 make_input_pixels(kRenderSize, kRenderSize, 1 * kInputDelta);
560 std::vector<GrColor> inputPixels3 =
561 make_input_pixels(kRenderSize, kRenderSize, 2 * kInputDelta);
562 GrSurfaceProxyView inputTexture1 =
563 make_input_texture(context, kRenderSize, kRenderSize, inputPixels1.data());
564 GrSurfaceProxyView inputTexture2 =
565 make_input_texture(context, kRenderSize, kRenderSize, inputPixels2.data());
566 GrSurfaceProxyView inputTexture3 =
567 make_input_texture(context, kRenderSize, kRenderSize, inputPixels3.data());
568
569 // Encoded images are very verbose and this tests many potential images, so only export the
570 // first failure (subsequent failures have a reasonable chance of being related).
571 bool loggedFirstFailure = false;
572 bool loggedFirstWarning = false;
573
574 // Storage for the three frames required for coverage compatibility optimization testing.
575 // Each frame uses the correspondingly numbered inputTextureX.
576 std::vector<GrColor> readData1(kRenderSize * kRenderSize);
577 std::vector<GrColor> readData2(kRenderSize * kRenderSize);
578 std::vector<GrColor> readData3(kRenderSize * kRenderSize);
579
580 // Because processor factories configure themselves in random ways, this is not exhaustive.
581 for (int i = 0; i < FPFactory::Count(); ++i) {
582 int optimizedForOpaqueInput = 0;
583 int optimizedForCoverageAsAlpha = 0;
584 int optimizedForConstantOutputForInput = 0;
585
586 #ifdef __MSVC_RUNTIME_CHECKS
587 // This test is infuriatingly slow with MSVC runtime checks enabled
588 static constexpr int kMinimumTrials = 1;
589 static constexpr int kMaximumTrials = 1;
590 static constexpr int kExpectedSuccesses = 1;
591 #else
592 // We start by testing each fragment-processor 100 times, watching the optimization bits
593 // that appear. If we see an optimization bit appear in those first 100 trials, we keep
594 // running tests until we see at least five successful trials that have this optimization
595 // bit enabled. If we never see a particular optimization bit after 100 trials, we assume
596 // that this FP doesn't support that optimization at all.
597 static constexpr int kMinimumTrials = 100;
598 static constexpr int kMaximumTrials = 2000;
599 static constexpr int kExpectedSuccesses = 5;
600 #endif
601
602 for (int trial = 0;; ++trial) {
603 // Create a randomly-configured FP.
604 fpGenerator.reroll();
605 std::unique_ptr<GrFragmentProcessor> fp =
606 fpGenerator.make(i, /*randomTreeDepth=*/1, inputTexture1);
607
608 // If we have iterated enough times and seen a sufficient number of successes on each
609 // optimization bit that can be returned, stop running trials.
610 if (trial >= kMinimumTrials) {
611 bool moreTrialsNeeded = (optimizedForOpaqueInput > 0 &&
612 optimizedForOpaqueInput < kExpectedSuccesses) ||
613 (optimizedForCoverageAsAlpha > 0 &&
614 optimizedForCoverageAsAlpha < kExpectedSuccesses) ||
615 (optimizedForConstantOutputForInput > 0 &&
616 optimizedForConstantOutputForInput < kExpectedSuccesses);
617 if (!moreTrialsNeeded) break;
618
619 if (trial >= kMaximumTrials) {
620 SkDebugf("Abandoning ProcessorOptimizationValidationTest after %d trials. "
621 "Seed: 0x%08x, processor:\n%s",
622 kMaximumTrials, fpGenerator.initialSeed(), fp->dumpTreeInfo().c_str());
623 break;
624 }
625 }
626
627 // Skip further testing if this trial has no optimization bits enabled.
628 if (!fp->hasConstantOutputForConstantInput() && !fp->preservesOpaqueInput() &&
629 !fp->compatibleWithCoverageAsAlpha()) {
630 continue;
631 }
632
633 // We can make identical copies of the test FP in order to test coverage-as-alpha.
634 if (fp->compatibleWithCoverageAsAlpha()) {
635 // Create and render two identical versions of this FP, but using different input
636 // textures, to check coverage optimization. We don't need to do this step for
637 // constant-output or preserving-opacity tests.
638 render_fp(context, rtc.get(),
639 fpGenerator.make(i, /*randomTreeDepth=*/1, inputTexture2),
640 readData2.data());
641 render_fp(context, rtc.get(),
642 fpGenerator.make(i, /*randomTreeDepth=*/1, inputTexture3),
643 readData3.data());
644 ++optimizedForCoverageAsAlpha;
645 }
646
647 if (fp->hasConstantOutputForConstantInput()) {
648 ++optimizedForConstantOutputForInput;
649 }
650
651 if (fp->preservesOpaqueInput()) {
652 ++optimizedForOpaqueInput;
653 }
654
655 // Draw base frame last so that rtc holds the original FP behavior if we need to dump
656 // the image to the log.
657 render_fp(context, rtc.get(), fpGenerator.make(i, /*randomTreeDepth=*/1, inputTexture1),
658 readData1.data());
659
660 // This test has a history of being flaky on a number of devices. If an FP is logically
661 // violating the optimizations, it's reasonable to expect it to violate requirements on
662 // a large number of pixels in the image. Sporadic pixel violations are more indicative
663 // of device errors and represents a separate problem.
664 #if defined(SK_BUILD_FOR_SKQP)
665 static constexpr int kMaxAcceptableFailedPixels = 0; // Strict when running as SKQP
666 #else
667 static constexpr int kMaxAcceptableFailedPixels = 2 * kRenderSize; // ~0.7% of the image
668 #endif
669
670 // Collect first optimization failure message, to be output later as a warning or an
671 // error depending on whether the rendering "passed" or failed.
672 int failedPixelCount = 0;
673 SkString coverageMessage;
674 SkString opaqueMessage;
675 SkString constMessage;
676 for (int y = 0; y < kRenderSize; ++y) {
677 for (int x = 0; x < kRenderSize; ++x) {
678 bool passing = true;
679 GrColor input = inputPixels1[y * kRenderSize + x];
680 GrColor output = readData1[y * kRenderSize + x];
681
682 if (fp->compatibleWithCoverageAsAlpha()) {
683 GrColor ins[3];
684 ins[0] = input;
685 ins[1] = inputPixels2[y * kRenderSize + x];
686 ins[2] = inputPixels3[y * kRenderSize + x];
687
688 GrColor outs[3];
689 outs[0] = output;
690 outs[1] = readData2[y * kRenderSize + x];
691 outs[2] = readData3[y * kRenderSize + x];
692
693 if (!legal_modulation(ins, outs)) {
694 passing = false;
695 if (coverageMessage.isEmpty()) {
696 coverageMessage.printf(
697 "\"Modulating\" processor did not match alpha-modulation "
698 "nor color-modulation rules.\n"
699 "Input: 0x%08x, Output: 0x%08x, pixel (%d, %d).",
700 input, output, x, y);
701 }
702 }
703 }
704
705 SkPMColor4f input4f = SkPMColor4f::FromBytes_RGBA(input);
706 SkPMColor4f output4f = SkPMColor4f::FromBytes_RGBA(output);
707 SkPMColor4f expected4f;
708 if (fp->hasConstantOutputForConstantInput(input4f, &expected4f)) {
709 float rDiff = fabsf(output4f.fR - expected4f.fR);
710 float gDiff = fabsf(output4f.fG - expected4f.fG);
711 float bDiff = fabsf(output4f.fB - expected4f.fB);
712 float aDiff = fabsf(output4f.fA - expected4f.fA);
713 static constexpr float kTol = 4 / 255.f;
714 if (rDiff > kTol || gDiff > kTol || bDiff > kTol || aDiff > kTol) {
715 if (constMessage.isEmpty()) {
716 passing = false;
717
718 constMessage.printf(
719 "Processor claimed output for const input doesn't match "
720 "actual output.\n"
721 "Error: %f, Tolerance: %f, input: (%f, %f, %f, %f), "
722 "actual: (%f, %f, %f, %f), expected(%f, %f, %f, %f).",
723 std::max(rDiff, std::max(gDiff, std::max(bDiff, aDiff))),
724 kTol, input4f.fR, input4f.fG, input4f.fB, input4f.fA,
725 output4f.fR, output4f.fG, output4f.fB, output4f.fA,
726 expected4f.fR, expected4f.fG, expected4f.fB, expected4f.fA);
727 }
728 }
729 }
730 if (input4f.isOpaque() && fp->preservesOpaqueInput() && !output4f.isOpaque()) {
731 passing = false;
732
733 if (opaqueMessage.isEmpty()) {
734 opaqueMessage.printf(
735 "Processor claimed opaqueness is preserved but "
736 "it is not. Input: 0x%08x, Output: 0x%08x.",
737 input, output);
738 }
739 }
740
741 if (!passing) {
742 // Regardless of how many optimizations the pixel violates, count it as a
743 // single bad pixel.
744 failedPixelCount++;
745 }
746 }
747 }
748
749 // Finished analyzing the entire image, see if the number of pixel failures meets the
750 // threshold for an FP violating the optimization requirements.
751 if (failedPixelCount > kMaxAcceptableFailedPixels) {
752 ERRORF(reporter,
753 "Processor violated %d of %d pixels, seed: 0x%08x.\n"
754 "Processor:\n%s\nFirst failing pixel details are below:",
755 failedPixelCount, kRenderSize * kRenderSize, fpGenerator.initialSeed(),
756 fp->dumpTreeInfo().c_str());
757
758 // Print first failing pixel's details.
759 if (!coverageMessage.isEmpty()) {
760 ERRORF(reporter, coverageMessage.c_str());
761 }
762 if (!constMessage.isEmpty()) {
763 ERRORF(reporter, constMessage.c_str());
764 }
765 if (!opaqueMessage.isEmpty()) {
766 ERRORF(reporter, opaqueMessage.c_str());
767 }
768
769 if (!loggedFirstFailure) {
770 // Print with ERRORF to make sure the encoded image is output
771 SkString input;
772 log_texture_view(context, inputTexture1, &input);
773 SkString output;
774 log_pixels(readData1.data(), kRenderSize, &output);
775 ERRORF(reporter, "Input image: %s\n\n"
776 "===========================================================\n\n"
777 "Output image: %s\n", input.c_str(), output.c_str());
778 loggedFirstFailure = true;
779 }
780 } else if (failedPixelCount > 0) {
781 // Don't trigger an error, but don't just hide the failures either.
782 INFOF(reporter, "Processor violated %d of %d pixels (below error threshold), seed: "
783 "0x%08x, processor: %s", failedPixelCount, kRenderSize * kRenderSize,
784 fpGenerator.initialSeed(), fp->dumpInfo().c_str());
785 if (!coverageMessage.isEmpty()) {
786 INFOF(reporter, coverageMessage.c_str());
787 }
788 if (!constMessage.isEmpty()) {
789 INFOF(reporter, constMessage.c_str());
790 }
791 if (!opaqueMessage.isEmpty()) {
792 INFOF(reporter, opaqueMessage.c_str());
793 }
794 if (!loggedFirstWarning) {
795 SkString input;
796 log_texture_view(context, inputTexture1, &input);
797 SkString output;
798 log_pixels(readData1.data(), kRenderSize, &output);
799 INFOF(reporter, "Input image: %s\n\n"
800 "===========================================================\n\n"
801 "Output image: %s\n", input.c_str(), output.c_str());
802 loggedFirstWarning = true;
803 }
804 }
805 }
806 }
807 }
808
assert_processor_equality(skiatest::Reporter * reporter,const GrFragmentProcessor & fp,const GrFragmentProcessor & clone)809 static void assert_processor_equality(skiatest::Reporter* reporter,
810 const GrFragmentProcessor& fp,
811 const GrFragmentProcessor& clone) {
812 REPORTER_ASSERT(reporter, !strcmp(fp.name(), clone.name()),
813 "\n%s", fp.dumpTreeInfo().c_str());
814 REPORTER_ASSERT(reporter, fp.compatibleWithCoverageAsAlpha() ==
815 clone.compatibleWithCoverageAsAlpha(),
816 "\n%s", fp.dumpTreeInfo().c_str());
817 REPORTER_ASSERT(reporter, fp.isEqual(clone),
818 "\n%s", fp.dumpTreeInfo().c_str());
819 REPORTER_ASSERT(reporter, fp.preservesOpaqueInput() == clone.preservesOpaqueInput(),
820 "\n%s", fp.dumpTreeInfo().c_str());
821 REPORTER_ASSERT(reporter, fp.hasConstantOutputForConstantInput() ==
822 clone.hasConstantOutputForConstantInput(),
823 "\n%s", fp.dumpTreeInfo().c_str());
824 REPORTER_ASSERT(reporter, fp.numChildProcessors() == clone.numChildProcessors(),
825 "\n%s", fp.dumpTreeInfo().c_str());
826 REPORTER_ASSERT(reporter, fp.usesVaryingCoords() == clone.usesVaryingCoords(),
827 "\n%s", fp.dumpTreeInfo().c_str());
828 REPORTER_ASSERT(reporter, fp.referencesSampleCoords() == clone.referencesSampleCoords(),
829 "\n%s", fp.dumpTreeInfo().c_str());
830 }
831
verify_identical_render(skiatest::Reporter * reporter,int renderSize,const char * processorType,const GrColor readData1[],const GrColor readData2[])832 static bool verify_identical_render(skiatest::Reporter* reporter, int renderSize,
833 const char* processorType,
834 const GrColor readData1[], const GrColor readData2[]) {
835 // The ProcessorClone test has a history of being flaky on a number of devices. If an FP clone
836 // is logically wrong, it's reasonable to expect it produce a large number of pixel differences
837 // in the image. Sporadic pixel violations are more indicative device errors and represents a
838 // separate problem.
839 #if defined(SK_BUILD_FOR_SKQP)
840 const int maxAcceptableFailedPixels = 0; // Strict when running as SKQP
841 #else
842 const int maxAcceptableFailedPixels = 2 * renderSize; // ~0.002% of the pixels (size 1024*1024)
843 #endif
844
845 int failedPixelCount = 0;
846 int firstWrongX = 0;
847 int firstWrongY = 0;
848 int idx = 0;
849 for (int y = 0; y < renderSize; ++y) {
850 for (int x = 0; x < renderSize; ++x, ++idx) {
851 if (readData1[idx] != readData2[idx]) {
852 if (!failedPixelCount) {
853 firstWrongX = x;
854 firstWrongY = y;
855 }
856 ++failedPixelCount;
857 }
858 if (failedPixelCount > maxAcceptableFailedPixels) {
859 idx = firstWrongY * renderSize + firstWrongX;
860 ERRORF(reporter,
861 "%s produced different output at (%d, %d). "
862 "Input color: 0x%08x, Original Output Color: 0x%08x, "
863 "Clone Output Color: 0x%08x.",
864 processorType, firstWrongX, firstWrongY, input_texel_color(x, y, 0.0f),
865 readData1[idx], readData2[idx]);
866
867 return false;
868 }
869 }
870 }
871
872 return true;
873 }
874
log_clone_failure(skiatest::Reporter * reporter,int renderSize,GrDirectContext * context,const GrSurfaceProxyView & inputTexture,GrColor pixelsFP[],GrColor pixelsClone[],GrColor pixelsRegen[])875 static void log_clone_failure(skiatest::Reporter* reporter, int renderSize,
876 GrDirectContext* context, const GrSurfaceProxyView& inputTexture,
877 GrColor pixelsFP[], GrColor pixelsClone[], GrColor pixelsRegen[]) {
878 // Write the images out as data URLs for inspection.
879 SkString inputURL, origURL, cloneURL, regenURL;
880 if (log_texture_view(context, inputTexture, &inputURL) &&
881 log_pixels(pixelsFP, renderSize, &origURL) &&
882 log_pixels(pixelsClone, renderSize, &cloneURL) &&
883 log_pixels(pixelsRegen, renderSize, ®enURL)) {
884 ERRORF(reporter,
885 "\nInput image:\n%s\n\n"
886 "==========================================================="
887 "\n\n"
888 "Orig output image:\n%s\n"
889 "==========================================================="
890 "\n\n"
891 "Clone output image:\n%s\n"
892 "==========================================================="
893 "\n\n"
894 "Regen output image:\n%s\n",
895 inputURL.c_str(), origURL.c_str(), cloneURL.c_str(), regenURL.c_str());
896 }
897 }
898
899 // Tests that a fragment processor returned by GrFragmentProcessor::clone() is equivalent to its
900 // progenitor.
DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(ProcessorCloneTest,reporter,ctxInfo)901 DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(ProcessorCloneTest, reporter, ctxInfo) {
902 GrDirectContext* context = ctxInfo.directContext();
903 GrResourceProvider* resourceProvider = context->priv().resourceProvider();
904
905 TestFPGenerator fpGenerator{context, resourceProvider};
906 if (!fpGenerator.init()) {
907 ERRORF(reporter, "Could not initialize TestFPGenerator");
908 return;
909 }
910
911 // Make the destination context for the test.
912 static constexpr int kRenderSize = 1024;
913 auto rtc = GrRenderTargetContext::Make(
914 context, GrColorType::kRGBA_8888, nullptr, SkBackingFit::kExact,
915 {kRenderSize, kRenderSize});
916
917 std::vector<GrColor> inputPixels = make_input_pixels(kRenderSize, kRenderSize, 0.0f);
918 GrSurfaceProxyView inputTexture =
919 make_input_texture(context, kRenderSize, kRenderSize, inputPixels.data());
920
921 // On failure we write out images, but just write the first failing set as the print is very
922 // large.
923 bool loggedFirstFailure = false;
924
925 // Storage for the original frame's readback and the readback of its clone.
926 std::vector<GrColor> readDataFP(kRenderSize * kRenderSize);
927 std::vector<GrColor> readDataClone(kRenderSize * kRenderSize);
928 std::vector<GrColor> readDataRegen(kRenderSize * kRenderSize);
929
930 // Because processor factories configure themselves in random ways, this is not exhaustive.
931 for (int i = 0; i < GrFragmentProcessorTestFactory::Count(); ++i) {
932 static constexpr int kTimesToInvokeFactory = 10;
933 for (int j = 0; j < kTimesToInvokeFactory; ++j) {
934 fpGenerator.reroll();
935 std::unique_ptr<GrFragmentProcessor> fp =
936 fpGenerator.make(i, /*randomTreeDepth=*/1, /*inputFP=*/nullptr);
937 std::unique_ptr<GrFragmentProcessor> regen =
938 fpGenerator.make(i, /*randomTreeDepth=*/1, /*inputFP=*/nullptr);
939 std::unique_ptr<GrFragmentProcessor> clone = fp->clone();
940 if (!clone) {
941 ERRORF(reporter, "Clone of processor %s failed.", fp->dumpTreeInfo().c_str());
942 continue;
943 }
944 assert_processor_equality(reporter, *fp, *clone);
945
946 // Draw with original and read back the results.
947 render_fp(context, rtc.get(), std::move(fp), readDataFP.data());
948
949 // Draw with clone and read back the results.
950 render_fp(context, rtc.get(), std::move(clone), readDataClone.data());
951
952 // Check that the results are the same.
953 if (!verify_identical_render(reporter, kRenderSize, "Processor clone",
954 readDataFP.data(), readDataClone.data())) {
955 // Dump a description from the regenerated processor (since the original FP has
956 // already been consumed).
957 ERRORF(reporter, "FP hierarchy:\n%s", regen->dumpTreeInfo().c_str());
958
959 // Render and readback output from the regenerated FP. If this also mismatches, the
960 // FP itself doesn't generate consistent output. This could happen if:
961 // - the FP's TestCreate() does not always generate the same FP from a given seed
962 // - the FP's Make() does not always generate the same FP when given the same inputs
963 // - the FP itself generates inconsistent pixels (shader UB?)
964 // - the driver has a bug
965 render_fp(context, rtc.get(), std::move(regen), readDataRegen.data());
966
967 if (!verify_identical_render(reporter, kRenderSize, "Regenerated processor",
968 readDataFP.data(), readDataRegen.data())) {
969 ERRORF(reporter, "Output from regen did not match original!\n");
970 } else {
971 ERRORF(reporter, "Regenerated processor output matches original results.\n");
972 }
973
974 // If this is the first time we've encountered a cloning failure, log the generated
975 // images to the reporter as data URLs.
976 if (!loggedFirstFailure) {
977 log_clone_failure(reporter, kRenderSize, context, inputTexture,
978 readDataFP.data(), readDataClone.data(),
979 readDataRegen.data());
980 loggedFirstFailure = true;
981 }
982 }
983 }
984 }
985 }
986
987 #endif // GR_TEST_UTILS
988