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skia2/tests/ProcessorTest.cpp
Greg Daniel 10ed243e2e Add cap on intel to avoid calling abs and floor on the same line in a 
shader.

This fixes a bug on some intel devices where we are failing
in the ProcessorOptimizationTest.

I've tried other "no op" type things between the floor call and abs which
also fixed the issue, as well as adding explicit checks to see if we are
less than -1 or greater than 1 where the clamp is. Thus the clamp itself
should be a no op and shouldn't secretly be fixing the problem outside
of forcing the floor and abs lines to be separate.

Bug: skia:
Change-Id: I85bf82e0e02607b78470b7a5f8f918e9f53f0154
Reviewed-on: https://skia-review.googlesource.com/76820
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
2017-12-02 00:00:59 +00:00

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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkTypes.h"
#include "Test.h"
#if SK_SUPPORT_GPU
#include <random>
#include "GrClip.h"
#include "GrContext.h"
#include "GrGpuResource.h"
#include "GrRenderTargetContext.h"
#include "GrRenderTargetContextPriv.h"
#include "GrResourceProvider.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "ops/GrMeshDrawOp.h"
#include "ops/GrRectOpFactory.h"
namespace {
class TestOp : public GrMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(std::unique_ptr<GrFragmentProcessor> fp) {
return std::unique_ptr<GrDrawOp>(new TestOp(std::move(fp)));
}
const char* name() const override { return "TestOp"; }
void visitProxies(const VisitProxyFunc& func) const override {
fProcessors.visitProxies(func);
}
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
RequiresDstTexture finalize(const GrCaps& caps, const GrAppliedClip* clip,
GrPixelConfigIsClamped dstIsClamped) override {
static constexpr GrProcessorAnalysisColor kUnknownColor;
GrColor overrideColor;
fProcessors.finalize(kUnknownColor, GrProcessorAnalysisCoverage::kNone, clip, false, caps,
dstIsClamped, &overrideColor);
return RequiresDstTexture::kNo;
}
private:
TestOp(std::unique_ptr<GrFragmentProcessor> fp)
: INHERITED(ClassID()), fProcessors(std::move(fp)) {
this->setBounds(SkRect::MakeWH(100, 100), HasAABloat::kNo, IsZeroArea::kNo);
}
void onPrepareDraws(Target* target) override { return; }
bool onCombineIfPossible(GrOp* op, const GrCaps& caps) override { return false; }
GrProcessorSet fProcessors;
typedef GrMeshDrawOp INHERITED;
};
/**
* FP used to test ref/IO counts on owned GrGpuResources. Can also be a parent FP to test counts
* of resources owned by child FPs.
*/
class TestFP : public GrFragmentProcessor {
public:
static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> child) {
return std::unique_ptr<GrFragmentProcessor>(new TestFP(std::move(child)));
}
static std::unique_ptr<GrFragmentProcessor> Make(const SkTArray<sk_sp<GrTextureProxy>>& proxies,
const SkTArray<sk_sp<GrBuffer>>& buffers) {
return std::unique_ptr<GrFragmentProcessor>(new TestFP(proxies, buffers));
}
const char* name() const override { return "test"; }
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const override {
// We don't really care about reusing these.
static int32_t gKey = 0;
b->add32(sk_atomic_inc(&gKey));
}
std::unique_ptr<GrFragmentProcessor> clone() const override {
return std::unique_ptr<GrFragmentProcessor>(new TestFP(*this));
}
private:
TestFP(const SkTArray<sk_sp<GrTextureProxy>>& proxies, const SkTArray<sk_sp<GrBuffer>>& buffers)
: INHERITED(kTestFP_ClassID, kNone_OptimizationFlags), fSamplers(4), fBuffers(4) {
for (const auto& proxy : proxies) {
this->addTextureSampler(&fSamplers.emplace_back(proxy));
}
for (const auto& buffer : buffers) {
this->addBufferAccess(&fBuffers.emplace_back(kRGBA_8888_GrPixelConfig, buffer.get()));
}
}
TestFP(std::unique_ptr<GrFragmentProcessor> child)
: INHERITED(kTestFP_ClassID, kNone_OptimizationFlags), fSamplers(4), fBuffers(4) {
this->registerChildProcessor(std::move(child));
}
explicit TestFP(const TestFP& that)
: INHERITED(kTestFP_ClassID, that.optimizationFlags()), fSamplers(4), fBuffers(4) {
for (int i = 0; i < that.fSamplers.count(); ++i) {
fSamplers.emplace_back(that.fSamplers[i]);
this->addTextureSampler(&fSamplers.back());
}
for (int i = 0; i < that.fBuffers.count(); ++i) {
fBuffers.emplace_back(that.fBuffers[i]);
this->addBufferAccess(&fBuffers.back());
}
for (int i = 0; i < that.numChildProcessors(); ++i) {
this->registerChildProcessor(that.childProcessor(i).clone());
}
}
virtual GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
class TestGLSLFP : public GrGLSLFragmentProcessor {
public:
TestGLSLFP() {}
void emitCode(EmitArgs& args) override {
GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
fragBuilder->codeAppendf("%s = %s;", args.fOutputColor, args.fInputColor);
}
private:
};
return new TestGLSLFP();
}
bool onIsEqual(const GrFragmentProcessor&) const override { return false; }
GrTAllocator<TextureSampler> fSamplers;
GrTAllocator<BufferAccess> fBuffers;
typedef GrFragmentProcessor INHERITED;
};
}
template <typename T>
inline void testingOnly_getIORefCnts(const T* resource, int* refCnt, int* readCnt, int* writeCnt) {
*refCnt = resource->fRefCnt;
*readCnt = resource->fPendingReads;
*writeCnt = resource->fPendingWrites;
}
void testingOnly_getIORefCnts(GrTextureProxy* proxy, int* refCnt, int* readCnt, int* writeCnt) {
*refCnt = proxy->getBackingRefCnt_TestOnly();
*readCnt = proxy->getPendingReadCnt_TestOnly();
*writeCnt = proxy->getPendingWriteCnt_TestOnly();
}
DEF_GPUTEST_FOR_ALL_CONTEXTS(ProcessorRefTest, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
GrSurfaceDesc desc;
desc.fOrigin = kTopLeft_GrSurfaceOrigin;
desc.fWidth = 10;
desc.fHeight = 10;
desc.fConfig = kRGBA_8888_GrPixelConfig;
for (bool makeClone : {false, true}) {
for (int parentCnt = 0; parentCnt < 2; parentCnt++) {
sk_sp<GrRenderTargetContext> renderTargetContext(
context->makeDeferredRenderTargetContext( SkBackingFit::kApprox, 1, 1,
kRGBA_8888_GrPixelConfig, nullptr));
{
bool texelBufferSupport = context->caps()->shaderCaps()->texelBufferSupport();
sk_sp<GrTextureProxy> proxy1(
GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
desc, SkBackingFit::kExact,
SkBudgeted::kYes));
sk_sp<GrTextureProxy> proxy2
(GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
desc, SkBackingFit::kExact,
SkBudgeted::kYes));
sk_sp<GrTextureProxy> proxy3(
GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
desc, SkBackingFit::kExact,
SkBudgeted::kYes));
sk_sp<GrTextureProxy> proxy4(
GrSurfaceProxy::MakeDeferred(context->resourceProvider(),
desc, SkBackingFit::kExact,
SkBudgeted::kYes));
sk_sp<GrBuffer> buffer(texelBufferSupport
? context->resourceProvider()->createBuffer(
1024, GrBufferType::kTexel_GrBufferType,
GrAccessPattern::kStatic_GrAccessPattern, 0)
: nullptr);
{
SkTArray<sk_sp<GrTextureProxy>> proxies;
SkTArray<sk_sp<GrBuffer>> buffers;
proxies.push_back(proxy1);
if (texelBufferSupport) {
buffers.push_back(buffer);
}
auto fp = TestFP::Make(std::move(proxies), std::move(buffers));
for (int i = 0; i < parentCnt; ++i) {
fp = TestFP::Make(std::move(fp));
}
std::unique_ptr<GrFragmentProcessor> clone;
if (makeClone) {
clone = fp->clone();
}
std::unique_ptr<GrDrawOp> op(TestOp::Make(std::move(fp)));
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
if (clone) {
op = TestOp::Make(std::move(clone));
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
}
}
int refCnt, readCnt, writeCnt;
testingOnly_getIORefCnts(proxy1.get(), &refCnt, &readCnt, &writeCnt);
// IO counts should be double if there is a clone of the FP.
int ioRefMul = makeClone ? 2 : 1;
REPORTER_ASSERT(reporter, 1 == refCnt);
REPORTER_ASSERT(reporter, ioRefMul * 1 == readCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == writeCnt);
if (texelBufferSupport) {
testingOnly_getIORefCnts(buffer.get(), &refCnt, &readCnt, &writeCnt);
REPORTER_ASSERT(reporter, 1 == refCnt);
REPORTER_ASSERT(reporter, ioRefMul * 1 == readCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == writeCnt);
}
context->flush();
testingOnly_getIORefCnts(proxy1.get(), &refCnt, &readCnt, &writeCnt);
REPORTER_ASSERT(reporter, 1 == refCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == readCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == writeCnt);
if (texelBufferSupport) {
testingOnly_getIORefCnts(buffer.get(), &refCnt, &readCnt, &writeCnt);
REPORTER_ASSERT(reporter, 1 == refCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == readCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == writeCnt);
}
if (texelBufferSupport) {
testingOnly_getIORefCnts(proxy2.get(), &refCnt, &readCnt, &writeCnt);
REPORTER_ASSERT(reporter, 1 == refCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == readCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == writeCnt);
testingOnly_getIORefCnts(proxy3.get(), &refCnt, &readCnt, &writeCnt);
REPORTER_ASSERT(reporter, 1 == refCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == readCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == writeCnt);
testingOnly_getIORefCnts(proxy4.get(), &refCnt, &readCnt, &writeCnt);
REPORTER_ASSERT(reporter, 1 == refCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == readCnt);
REPORTER_ASSERT(reporter, ioRefMul * 0 == writeCnt);
}
}
}
}
}
// This test uses the random GrFragmentProcessor test factory, which relies on static initializers.
#if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
#include "SkCommandLineFlags.h"
DEFINE_bool(randomProcessorTest, false, "Use non-deterministic seed for random processor tests?");
#if GR_TEST_UTILS
static GrColor input_texel_color(int i, int j) {
GrColor color = GrColorPackRGBA((uint8_t)j, (uint8_t)(i + j), (uint8_t)(2 * j - i), (uint8_t)i);
return GrPremulColor(color);
}
static GrColor4f input_texel_color4f(int i, int j) {
return GrColor4f::FromGrColor(input_texel_color(i, j));
}
void test_draw_op(GrRenderTargetContext* rtc, std::unique_ptr<GrFragmentProcessor> fp,
sk_sp<GrTextureProxy> inputDataProxy) {
GrPaint paint;
paint.addColorTextureProcessor(std::move(inputDataProxy), SkMatrix::I());
paint.addColorFragmentProcessor(std::move(fp));
paint.setPorterDuffXPFactory(SkBlendMode::kSrc);
auto op = GrRectOpFactory::MakeNonAAFill(std::move(paint), SkMatrix::I(),
SkRect::MakeWH(rtc->width(), rtc->height()),
GrAAType::kNone);
rtc->addDrawOp(GrNoClip(), std::move(op));
}
/** Initializes the two test texture proxies that are available to the FP test factories. */
bool init_test_textures(GrContext* context, SkRandom* random, sk_sp<GrTextureProxy> proxies[2]) {
static const int kTestTextureSize = 256;
GrSurfaceDesc desc;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
desc.fWidth = kTestTextureSize;
desc.fHeight = kTestTextureSize;
desc.fConfig = kRGBA_8888_GrPixelConfig;
// Put premul data into the RGBA texture that the test FPs can optionally use.
std::unique_ptr<GrColor[]> rgbaData(new GrColor[kTestTextureSize * kTestTextureSize]);
for (int y = 0; y < kTestTextureSize; ++y) {
for (int x = 0; x < kTestTextureSize; ++x) {
rgbaData[kTestTextureSize * y + x] =
input_texel_color(random->nextULessThan(256), random->nextULessThan(256));
}
}
proxies[0] = GrSurfaceProxy::MakeDeferred(context->resourceProvider(), desc, SkBudgeted::kYes,
rgbaData.get(), kTestTextureSize * sizeof(GrColor));
// Put random values into the alpha texture that the test FPs can optionally use.
desc.fConfig = kAlpha_8_GrPixelConfig;
std::unique_ptr<uint8_t[]> alphaData(new uint8_t[kTestTextureSize * kTestTextureSize]);
for (int y = 0; y < kTestTextureSize; ++y) {
for (int x = 0; x < kTestTextureSize; ++x) {
alphaData[kTestTextureSize * y + x] = random->nextULessThan(256);
}
}
proxies[1] = GrSurfaceProxy::MakeDeferred(context->resourceProvider(), desc, SkBudgeted::kYes,
alphaData.get(), kTestTextureSize);
return proxies[0] && proxies[1];
}
// Creates a texture of premul colors used as the output of the fragment processor that precedes
// the fragment processor under test. Color values are those provided by input_texel_color().
sk_sp<GrTextureProxy> make_input_texture(GrContext* context, int width, int height) {
std::unique_ptr<GrColor[]> data(new GrColor[width * height]);
for (int y = 0; y < width; ++y) {
for (int x = 0; x < height; ++x) {
data.get()[width * y + x] = input_texel_color(x, y);
}
}
GrSurfaceDesc desc;
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
desc.fWidth = width;
desc.fHeight = height;
desc.fConfig = kRGBA_8888_GrPixelConfig;
return GrSurfaceProxy::MakeDeferred(context->resourceProvider(), desc, SkBudgeted::kYes,
data.get(), width * sizeof(GrColor));
}
DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(ProcessorOptimizationValidationTest, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
using FPFactory = GrFragmentProcessorTestFactory;
uint32_t seed = 0;
if (FLAGS_randomProcessorTest) {
std::random_device rd;
seed = rd();
}
// If a non-deterministic bot fails this test, check the output to see what seed it used, then
// hard-code that value here:
SkRandom random(seed);
// Make the destination context for the test.
static constexpr int kRenderSize = 256;
sk_sp<GrRenderTargetContext> rtc = context->makeDeferredRenderTargetContext(
SkBackingFit::kExact, kRenderSize, kRenderSize, kRGBA_8888_GrPixelConfig, nullptr);
sk_sp<GrTextureProxy> proxies[2];
if (!init_test_textures(context, &random, proxies)) {
ERRORF(reporter, "Could not create test textures");
return;
}
GrProcessorTestData testData(&random, context, rtc.get(), proxies);
auto inputTexture = make_input_texture(context, kRenderSize, kRenderSize);
std::unique_ptr<GrColor[]> readData(new GrColor[kRenderSize * kRenderSize]);
// Because processor factories configure themselves in random ways, this is not exhaustive.
for (int i = 0; i < FPFactory::Count(); ++i) {
int timesToInvokeFactory = 5;
// Increase the number of attempts if the FP has child FPs since optimizations likely depend
// on child optimizations being present.
std::unique_ptr<GrFragmentProcessor> fp = FPFactory::MakeIdx(i, &testData);
for (int j = 0; j < fp->numChildProcessors(); ++j) {
// This value made a reasonable trade off between time and coverage when this test was
// written.
timesToInvokeFactory *= FPFactory::Count() / 2;
}
for (int j = 0; j < timesToInvokeFactory; ++j) {
fp = FPFactory::MakeIdx(i, &testData);
if (!fp->instantiate(context->resourceProvider())) {
continue;
}
if (!fp->hasConstantOutputForConstantInput() && !fp->preservesOpaqueInput() &&
!fp->compatibleWithCoverageAsAlpha()) {
continue;
}
// Since we transfer away ownership of the original FP, we make a clone.
auto clone = fp->clone();
test_draw_op(rtc.get(), std::move(fp), inputTexture);
memset(readData.get(), 0x0, sizeof(GrColor) * kRenderSize * kRenderSize);
rtc->readPixels(SkImageInfo::Make(kRenderSize, kRenderSize, kRGBA_8888_SkColorType,
kPremul_SkAlphaType),
readData.get(), 0, 0, 0);
bool passing = true;
if (0) { // Useful to see what FPs are being tested.
SkString children;
for (int c = 0; c < clone->numChildProcessors(); ++c) {
if (!c) {
children.append("(");
}
children.append(clone->name());
children.append(c == clone->numChildProcessors() - 1 ? ")" : ", ");
}
SkDebugf("%s %s\n", clone->name(), children.c_str());
}
for (int y = 0; y < kRenderSize && passing; ++y) {
for (int x = 0; x < kRenderSize && passing; ++x) {
GrColor input = input_texel_color(x, y);
GrColor output = readData.get()[y * kRenderSize + x];
if (clone->compatibleWithCoverageAsAlpha()) {
// A modulating processor is allowed to modulate either the input color or
// just the input alpha.
bool legalColorModulation =
GrColorUnpackA(output) <= GrColorUnpackA(input) &&
GrColorUnpackR(output) <= GrColorUnpackR(input) &&
GrColorUnpackG(output) <= GrColorUnpackG(input) &&
GrColorUnpackB(output) <= GrColorUnpackB(input);
bool legalAlphaModulation =
GrColorUnpackA(output) <= GrColorUnpackA(input) &&
GrColorUnpackR(output) <= GrColorUnpackA(input) &&
GrColorUnpackG(output) <= GrColorUnpackA(input) &&
GrColorUnpackB(output) <= GrColorUnpackA(input);
if (!legalColorModulation && !legalAlphaModulation) {
ERRORF(reporter,
"\"Modulating\" processor %s made color/alpha value larger. "
"Input: 0x%08x, Output: 0x%08x, pixel (%d, %d).",
clone->name(), input, output, x, y);
passing = false;
}
}
GrColor4f input4f = input_texel_color4f(x, y);
GrColor4f output4f = GrColor4f::FromGrColor(output);
GrColor4f expected4f;
if (clone->hasConstantOutputForConstantInput(input4f, &expected4f)) {
float rDiff = fabsf(output4f.fRGBA[0] - expected4f.fRGBA[0]);
float gDiff = fabsf(output4f.fRGBA[1] - expected4f.fRGBA[1]);
float bDiff = fabsf(output4f.fRGBA[2] - expected4f.fRGBA[2]);
float aDiff = fabsf(output4f.fRGBA[3] - expected4f.fRGBA[3]);
static constexpr float kTol = 4 / 255.f;
if (rDiff > kTol || gDiff > kTol || bDiff > kTol || aDiff > kTol) {
ERRORF(reporter,
"Processor %s claimed output for const input doesn't match "
"actual output. Error: %f, Tolerance: %f, input: (%f, %f, %f, "
"%f), actual: (%f, %f, %f, %f), expected(%f, %f, %f, %f)",
fp->name(), SkTMax(rDiff, SkTMax(gDiff, SkTMax(bDiff, aDiff))),
kTol, input4f.fRGBA[0], input4f.fRGBA[1], input4f.fRGBA[2],
input4f.fRGBA[3], output4f.fRGBA[0], output4f.fRGBA[1],
output4f.fRGBA[2], output4f.fRGBA[3], expected4f.fRGBA[0],
expected4f.fRGBA[1], expected4f.fRGBA[2], expected4f.fRGBA[3]);
passing = false;
}
}
if (GrColorIsOpaque(input) && clone->preservesOpaqueInput() &&
!GrColorIsOpaque(output)) {
ERRORF(reporter,
"Processor %s claimed opaqueness is preserved but it is not. Input: "
"0x%08x, Output: 0x%08x.",
clone->name(), input, output);
passing = false;
}
if (!passing) {
ERRORF(reporter, "Seed: 0x%08x, Processor details: %s", seed,
clone->dumpInfo().c_str());
}
}
}
}
}
}
// Tests that fragment processors returned by GrFragmentProcessor::clone() are equivalent to their
// progenitors.
DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(ProcessorCloneTest, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
SkRandom random;
// Make the destination context for the test.
static constexpr int kRenderSize = 1024;
sk_sp<GrRenderTargetContext> rtc = context->makeDeferredRenderTargetContext(
SkBackingFit::kExact, kRenderSize, kRenderSize, kRGBA_8888_GrPixelConfig, nullptr);
sk_sp<GrTextureProxy> proxies[2];
if (!init_test_textures(context, &random, proxies)) {
ERRORF(reporter, "Could not create test textures");
return;
}
GrProcessorTestData testData(&random, context, rtc.get(), proxies);
auto inputTexture = make_input_texture(context, kRenderSize, kRenderSize);
std::unique_ptr<GrColor[]> readData1(new GrColor[kRenderSize * kRenderSize]);
std::unique_ptr<GrColor[]> readData2(new GrColor[kRenderSize * kRenderSize]);
auto readInfo = SkImageInfo::Make(kRenderSize, kRenderSize, kRGBA_8888_SkColorType,
kPremul_SkAlphaType);
// Because processor factories configure themselves in random ways, this is not exhaustive.
for (int i = 0; i < GrFragmentProcessorTestFactory::Count(); ++i) {
static constexpr int kTimesToInvokeFactory = 10;
for (int j = 0; j < kTimesToInvokeFactory; ++j) {
auto fp = GrFragmentProcessorTestFactory::MakeIdx(i, &testData);
auto clone = fp->clone();
if (!clone) {
ERRORF(reporter, "Clone of processor %s failed.", fp->name());
continue;
}
const char* name = fp->name();
if (!fp->instantiate(context->resourceProvider()) ||
!clone->instantiate(context->resourceProvider())) {
continue;
}
REPORTER_ASSERT(reporter, !strcmp(fp->name(), clone->name()));
REPORTER_ASSERT(reporter, fp->compatibleWithCoverageAsAlpha() ==
clone->compatibleWithCoverageAsAlpha());
REPORTER_ASSERT(reporter, fp->isEqual(*clone));
REPORTER_ASSERT(reporter, fp->preservesOpaqueInput() == clone->preservesOpaqueInput());
REPORTER_ASSERT(reporter, fp->hasConstantOutputForConstantInput() ==
clone->hasConstantOutputForConstantInput());
REPORTER_ASSERT(reporter, fp->numChildProcessors() == clone->numChildProcessors());
REPORTER_ASSERT(reporter, fp->usesLocalCoords() == clone->usesLocalCoords());
// Draw with original and read back the results.
test_draw_op(rtc.get(), std::move(fp), inputTexture);
memset(readData1.get(), 0x0, sizeof(GrColor) * kRenderSize * kRenderSize);
rtc->readPixels(readInfo, readData1.get(), 0, 0, 0);
// Draw with clone and read back the results.
test_draw_op(rtc.get(), std::move(clone), inputTexture);
memset(readData2.get(), 0x0, sizeof(GrColor) * kRenderSize * kRenderSize);
rtc->readPixels(readInfo, readData2.get(), 0, 0, 0);
// Check that the results are the same.
bool passing = true;
for (int y = 0; y < kRenderSize && passing; ++y) {
for (int x = 0; x < kRenderSize && passing; ++x) {
int idx = y * kRenderSize + x;
if (readData1[idx] != readData2[idx]) {
ERRORF(reporter,
"Processor %s made clone produced different output. "
"Input color: 0x%08x, Original Output Color: 0x%08x, "
"Clone Output Color: 0x%08x..",
name, input_texel_color(x, y), readData1[idx], readData2[idx]);
passing = false;
}
}
}
}
}
}
#endif // GR_TEST_UTILS
#endif // SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
#endif // SK_SUPPORT_GPU
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