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skia2/tests/ProcessorTest.cpp
Brian Osman 5ced0bfd00 Add shader based blending of kPlus for configs that need clamping 
This effectively reverts https://skia-review.googlesource.com/c/skia/+/140500
and relands https://skia-review.googlesource.com/c/skia/+/48183.

Bug: skia:8871
Change-Id: I6b1d5daa3d319e0c078e553926ed9166cca9a24a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/199930
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2019-03-15 14:54:17 +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"
#include "GrClip.h"
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrGpuResource.h"
#include "GrMemoryPool.h"
#include "GrProxyProvider.h"
#include "GrRenderTargetContext.h"
#include "GrRenderTargetContextPriv.h"
#include "GrResourceProvider.h"
#include "glsl/GrGLSLFragmentProcessor.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "ops/GrFillRectOp.h"
#include "ops/GrMeshDrawOp.h"
#include "TestUtils.h"
#include <atomic>
#include <random>
namespace {
class TestOp : public GrMeshDrawOp {
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(GrContext* context,
std::unique_ptr<GrFragmentProcessor> fp) {
GrOpMemoryPool* pool = context->priv().opMemoryPool();
return pool->allocate<TestOp>(std::move(fp));
}
const char* name() const override { return "TestOp"; }
void visitProxies(const VisitProxyFunc& func, VisitorType) const override {
fProcessors.visitProxies(func);
}
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
GrProcessorSet::Analysis finalize(const GrCaps& caps, const GrAppliedClip* clip,
GrFSAAType fsaaType, GrClampType clampType) override {
static constexpr GrProcessorAnalysisColor kUnknownColor;
SkPMColor4f overrideColor;
return fProcessors.finalize(
kUnknownColor, GrProcessorAnalysisCoverage::kNone, clip,
&GrUserStencilSettings::kUnused, fsaaType, caps, clampType, &overrideColor);
}
private:
friend class ::GrOpMemoryPool; // for ctor
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; }
void onExecute(GrOpFlushState*, const SkRect&) override { return; }
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<GrGpuBuffer>>& 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 {
static std::atomic<int32_t> nextKey{0};
b->add32(nextKey++);
}
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<GrGpuBuffer>>& buffers)
: INHERITED(kTestFP_ClassID, kNone_OptimizationFlags), fSamplers(4) {
for (const auto& proxy : proxies) {
fSamplers.emplace_back(proxy);
}
this->setTextureSamplerCnt(fSamplers.count());
}
TestFP(std::unique_ptr<GrFragmentProcessor> child)
: INHERITED(kTestFP_ClassID, kNone_OptimizationFlags), fSamplers(4) {
this->registerChildProcessor(std::move(child));
}
explicit TestFP(const TestFP& that)
: INHERITED(kTestFP_ClassID, that.optimizationFlags()), fSamplers(4) {
for (int i = 0; i < that.fSamplers.count(); ++i) {
fSamplers.emplace_back(that.fSamplers[i]);
}
for (int i = 0; i < that.numChildProcessors(); ++i) {
this->registerChildProcessor(that.childProcessor(i).clone());
}
this->setTextureSamplerCnt(fSamplers.count());
}
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; }
const TextureSampler& onTextureSampler(int i) const override { return fSamplers[i]; }
GrTAllocator<TextureSampler> fSamplers;
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();
GrProxyProvider* proxyProvider = context->priv().proxyProvider();
GrSurfaceDesc desc;
desc.fWidth = 10;
desc.fHeight = 10;
desc.fConfig = kRGBA_8888_GrPixelConfig;
const GrBackendFormat format =
context->priv().caps()->getBackendFormatFromColorType(kRGBA_8888_SkColorType);
for (bool makeClone : {false, true}) {
for (int parentCnt = 0; parentCnt < 2; parentCnt++) {
sk_sp<GrRenderTargetContext> renderTargetContext(
context->priv().makeDeferredRenderTargetContext(
format, SkBackingFit::kApprox, 1, 1,
kRGBA_8888_GrPixelConfig, nullptr));
{
sk_sp<GrTextureProxy> proxy1 = proxyProvider->createProxy(
format, desc, kTopLeft_GrSurfaceOrigin, SkBackingFit::kExact,
SkBudgeted::kYes);
sk_sp<GrTextureProxy> proxy2 = proxyProvider->createProxy(
format, desc, kTopLeft_GrSurfaceOrigin, SkBackingFit::kExact,
SkBudgeted::kYes);
sk_sp<GrTextureProxy> proxy3 = proxyProvider->createProxy(
format, desc, kTopLeft_GrSurfaceOrigin, SkBackingFit::kExact,
SkBudgeted::kYes);
sk_sp<GrTextureProxy> proxy4 = proxyProvider->createProxy(
format, desc, kTopLeft_GrSurfaceOrigin, SkBackingFit::kExact,
SkBudgeted::kYes);
{
SkTArray<sk_sp<GrTextureProxy>> proxies;
SkTArray<sk_sp<GrGpuBuffer>> buffers;
proxies.push_back(proxy1);
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(context, std::move(fp)));
renderTargetContext->priv().testingOnly_addDrawOp(std::move(op));
if (clone) {
op = TestOp::Make(context, 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);
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);
}
}
}
}
// 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?");
DEFINE_uint32(processorSeed, 0, "Use specific seed for processor tests. Overridden by " \
"--randomProcessorTest.");
#if GR_TEST_UTILS
static GrColor input_texel_color(int i, int j, SkScalar delta) {
// Delta must be less than 0.5 to prevent over/underflow issues with the input color
SkASSERT(delta <= 0.5);
SkColor color = SkColorSetARGB((uint8_t)(i & 0xFF),
(uint8_t)(j & 0xFF),
(uint8_t)((i + j) & 0xFF),
(uint8_t)((2 * j - i) & 0xFF));
SkColor4f color4f = SkColor4f::FromColor(color);
for (int i = 0; i < 4; i++) {
if (color4f[i] > 0.5) {
color4f[i] -= delta;
} else {
color4f[i] += delta;
}
}
return color4f.premul().toBytes_RGBA();
}
void test_draw_op(GrContext* context,
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 = GrFillRectOp::Make(context, std::move(paint), GrAAType::kNone, SkMatrix::I(),
SkRect::MakeWH(rtc->width(), rtc->height()));
rtc->addDrawOp(GrNoClip(), std::move(op));
}
// This assumes that the output buffer will be the same size as inputDataProxy
void render_fp(GrContext* context, GrRenderTargetContext* rtc, GrFragmentProcessor* fp,
sk_sp<GrTextureProxy> inputDataProxy, GrColor* buffer) {
int width = inputDataProxy->width();
int height = inputDataProxy->height();
// test_draw_op needs to take ownership of an FP, so give it a clone that it can own
test_draw_op(context, rtc, fp->clone(), inputDataProxy);
memset(buffer, 0x0, sizeof(GrColor) * width * height);
rtc->readPixels(SkImageInfo::Make(width, height, kRGBA_8888_SkColorType,
kPremul_SkAlphaType),
buffer, 0, 0, 0);
}
/** Initializes the two test texture proxies that are available to the FP test factories. */
bool init_test_textures(GrProxyProvider* proxyProvider, SkRandom* random,
sk_sp<GrTextureProxy> proxies[2]) {
static const int kTestTextureSize = 256;
{
// 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), 0.0f);
}
}
SkImageInfo ii = SkImageInfo::Make(kTestTextureSize, kTestTextureSize,
kRGBA_8888_SkColorType, kPremul_SkAlphaType);
SkPixmap pixmap(ii, rgbaData.get(), ii.minRowBytes());
sk_sp<SkImage> img = SkImage::MakeRasterCopy(pixmap);
proxies[0] = proxyProvider->createTextureProxy(img, kNone_GrSurfaceFlags, 1,
SkBudgeted::kYes, SkBackingFit::kExact);
}
{
// Put random values into the alpha texture that the test FPs can optionally use.
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);
}
}
SkImageInfo ii = SkImageInfo::Make(kTestTextureSize, kTestTextureSize,
kAlpha_8_SkColorType, kPremul_SkAlphaType);
SkPixmap pixmap(ii, alphaData.get(), ii.minRowBytes());
sk_sp<SkImage> img = SkImage::MakeRasterCopy(pixmap);
proxies[1] = proxyProvider->createTextureProxy(img, kNone_GrSurfaceFlags, 1,
SkBudgeted::kYes, SkBackingFit::kExact);
}
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(GrProxyProvider* proxyProvider, int width, int height,
SkScalar delta) {
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, delta);
}
}
SkImageInfo ii = SkImageInfo::Make(width, height, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
SkPixmap pixmap(ii, data.get(), ii.minRowBytes());
sk_sp<SkImage> img = SkImage::MakeRasterCopy(pixmap);
return proxyProvider->createTextureProxy(img, kNone_GrSurfaceFlags, 1,
SkBudgeted::kYes, SkBackingFit::kExact);
}
bool log_surface_context(sk_sp<GrSurfaceContext> src, SkString* dst) {
SkImageInfo ii = SkImageInfo::Make(src->width(), src->height(), kRGBA_8888_SkColorType,
kPremul_SkAlphaType);
SkBitmap bm;
SkAssertResult(bm.tryAllocPixels(ii));
SkAssertResult(src->readPixels(ii, bm.getPixels(), bm.rowBytes(), 0, 0));
return bitmap_to_base64_data_uri(bm, dst);
}
bool log_surface_proxy(GrContext* context, sk_sp<GrSurfaceProxy> src, SkString* dst) {
sk_sp<GrSurfaceContext> sContext(context->priv().makeWrappedSurfaceContext(src));
return log_surface_context(sContext, dst);
}
bool fuzzy_color_equals(const SkPMColor4f& c1, const SkPMColor4f& c2) {
// With the loss of precision of rendering into 32-bit color, then estimating the FP's output
// from that, it is not uncommon for a valid output to differ from estimate by up to 0.01
// (really 1/128 ~ .0078, but frequently floating point issues make that tolerance a little
// too unforgiving).
static constexpr SkScalar kTolerance = 0.01f;
for (int i = 0; i < 4; i++) {
if (!SkScalarNearlyEqual(c1[i], c2[i], kTolerance)) {
return false;
}
}
return true;
}
int modulation_index(int channelIndex, bool alphaModulation) {
return alphaModulation ? 3 : channelIndex;
}
// Given three input colors (color preceding the FP being tested), and the output of the FP, this
// ensures that the out1 = fp * in1.a, out2 = fp * in2.a, and out3 = fp * in3.a, where fp is the
// pre-modulated color that should not be changing across frames (FP's state doesn't change).
//
// When alphaModulation is false, this tests the very similar conditions that out1 = fp * in1,
// etc. using per-channel modulation instead of modulation by just the input alpha channel.
// - This estimates the pre-modulated fp color from one of the input/output pairs and confirms the
// conditions hold for the other two pairs.
bool legal_modulation(const GrColor& in1, const GrColor& in2, const GrColor& in3,
const GrColor& out1, const GrColor& out2, const GrColor& out3,
bool alphaModulation) {
// Convert to floating point, which is the number space the FP operates in (more or less)
SkPMColor4f in1f = SkPMColor4f::FromBytes_RGBA(in1);
SkPMColor4f in2f = SkPMColor4f::FromBytes_RGBA(in2);
SkPMColor4f in3f = SkPMColor4f::FromBytes_RGBA(in3);
SkPMColor4f out1f = SkPMColor4f::FromBytes_RGBA(out1);
SkPMColor4f out2f = SkPMColor4f::FromBytes_RGBA(out2);
SkPMColor4f out3f = SkPMColor4f::FromBytes_RGBA(out3);
// Reconstruct the output of the FP before the shader modulated its color with the input value.
// When the original input is very small, it may cause the final output color to round
// to 0, in which case we estimate the pre-modulated color using one of the stepped frames that
// will then have a guaranteed larger channel value (since the offset will be added to it).
SkPMColor4f fpPreModulation;
for (int i = 0; i < 4; i++) {
int modulationIndex = modulation_index(i, alphaModulation);
if (in1f[modulationIndex] < 0.2f) {
// Use the stepped frame
fpPreModulation[i] = out2f[i] / in2f[modulationIndex];
} else {
fpPreModulation[i] = out1f[i] / in1f[modulationIndex];
}
}
// With reconstructed pre-modulated FP output, derive the expected value of fp * input for each
// of the transformed input colors.
SkPMColor4f expected1 = alphaModulation ? (fpPreModulation * in1f.fA)
: (fpPreModulation * in1f);
SkPMColor4f expected2 = alphaModulation ? (fpPreModulation * in2f.fA)
: (fpPreModulation * in2f);
SkPMColor4f expected3 = alphaModulation ? (fpPreModulation * in3f.fA)
: (fpPreModulation * in3f);
return fuzzy_color_equals(out1f, expected1) &&
fuzzy_color_equals(out2f, expected2) &&
fuzzy_color_equals(out3f, expected3);
}
DEF_GPUTEST_FOR_GL_RENDERING_CONTEXTS(ProcessorOptimizationValidationTest, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
GrProxyProvider* proxyProvider = context->priv().proxyProvider();
auto resourceProvider = context->priv().resourceProvider();
using FPFactory = GrFragmentProcessorTestFactory;
uint32_t seed = FLAGS_processorSeed;
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
// use --processorSeed <seed> (without --randomProcessorTest) to reproduce.
SkRandom random(seed);
const GrBackendFormat format =
context->priv().caps()->getBackendFormatFromColorType(kRGBA_8888_SkColorType);
// Make the destination context for the test.
static constexpr int kRenderSize = 256;
sk_sp<GrRenderTargetContext> rtc = context->priv().makeDeferredRenderTargetContext(
format, SkBackingFit::kExact, kRenderSize, kRenderSize, kRGBA_8888_GrPixelConfig,
nullptr);
sk_sp<GrTextureProxy> proxies[2];
if (!init_test_textures(proxyProvider, &random, proxies)) {
ERRORF(reporter, "Could not create test textures");
return;
}
GrProcessorTestData testData(&random, context, rtc.get(), proxies);
// Coverage optimization uses three frames with a linearly transformed input texture. The first
// frame has no offset, second frames add .2 and .4, which should then be present as a fixed
// difference between the frame outputs if the FP is properly following the modulation
// requirements of the coverage optimization.
static constexpr SkScalar kInputDelta = 0.2f;
auto inputTexture1 = make_input_texture(proxyProvider, kRenderSize, kRenderSize, 0.0f);
auto inputTexture2 = make_input_texture(proxyProvider, kRenderSize, kRenderSize, kInputDelta);
auto inputTexture3 = make_input_texture(proxyProvider, kRenderSize, kRenderSize, 2*kInputDelta);
// Encoded images are very verbose and this tests many potential images, so only export the
// first failure (subsequent failures have a reasonable chance of being related).
bool loggedFirstFailure = false;
bool loggedFirstWarning = false;
// Storage for the three frames required for coverage compatibility optimization. Each frame
// uses the correspondingly numbered inputTextureX.
std::unique_ptr<GrColor[]> readData1(new GrColor[kRenderSize * kRenderSize]);
std::unique_ptr<GrColor[]> readData2(new GrColor[kRenderSize * kRenderSize]);
std::unique_ptr<GrColor[]> readData3(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;
}
#if defined(__MSVC_RUNTIME_CHECKS)
// This test is infuriatingly slow with MSVC runtime checks enabled
timesToInvokeFactory = 1;
#endif
for (int j = 0; j < timesToInvokeFactory; ++j) {
fp = FPFactory::MakeIdx(i, &testData);
if (!fp->instantiate(resourceProvider)) {
continue;
}
if (!fp->hasConstantOutputForConstantInput() && !fp->preservesOpaqueInput() &&
!fp->compatibleWithCoverageAsAlpha()) {
continue;
}
if (fp->compatibleWithCoverageAsAlpha()) {
// 2nd and 3rd frames are only used when checking coverage optimization
render_fp(context, rtc.get(), fp.get(), inputTexture2, readData2.get());
render_fp(context, rtc.get(), fp.get(), inputTexture3, readData3.get());
}
// Draw base frame last so that rtc holds the original FP behavior if we need to
// dump the image to the log.
render_fp(context, rtc.get(), fp.get(), inputTexture1, readData1.get());
if (0) { // Useful to see what FPs are being tested.
SkString children;
for (int c = 0; c < fp->numChildProcessors(); ++c) {
if (!c) {
children.append("(");
}
children.append(fp->childProcessor(c).name());
children.append(c == fp->numChildProcessors() - 1 ? ")" : ", ");
}
SkDebugf("%s %s\n", fp->name(), children.c_str());
}
// This test has a history of being flaky on a number of devices. If an FP is logically
// violating the optimizations, it's reasonable to expect it to violate requirements on
// a large number of pixels in the image. Sporadic pixel violations are more indicative
// of device errors and represents a separate problem.
#if defined(SK_BUILD_FOR_SKQP)
static constexpr int kMaxAcceptableFailedPixels = 0; // Strict when running as SKQP
#else
static constexpr int kMaxAcceptableFailedPixels = 2 * kRenderSize; // ~0.7% of the image
#endif
int failedPixelCount = 0;
// Collect first optimization failure message, to be output later as a warning or an
// error depending on whether the rendering "passed" or failed.
SkString coverageMessage;
SkString opaqueMessage;
SkString constMessage;
for (int y = 0; y < kRenderSize; ++y) {
for (int x = 0; x < kRenderSize; ++x) {
bool passing = true;
GrColor input = input_texel_color(x, y, 0.0f);
GrColor output = readData1.get()[y * kRenderSize + x];
if (fp->compatibleWithCoverageAsAlpha()) {
GrColor i2 = input_texel_color(x, y, kInputDelta);
GrColor i3 = input_texel_color(x, y, 2 * kInputDelta);
GrColor o2 = readData2.get()[y * kRenderSize + x];
GrColor o3 = readData3.get()[y * kRenderSize + x];
// A compatible processor is allowed to modulate either the input color or
// just the input alpha.
bool legalAlphaModulation = legal_modulation(input, i2, i3, output, o2, o3,
/* alpha */ true);
bool legalColorModulation = legal_modulation(input, i2, i3, output, o2, o3,
/* alpha */ false);
if (!legalColorModulation && !legalAlphaModulation) {
passing = false;
if (coverageMessage.isEmpty()) {
coverageMessage.printf("\"Modulating\" processor %s did not match "
"alpha-modulation nor color-modulation rules. "
"Input: 0x%08x, Output: 0x%08x, pixel (%d, %d).",
fp->name(), input, output, x, y);
}
}
}
SkPMColor4f input4f = SkPMColor4f::FromBytes_RGBA(input);
SkPMColor4f output4f = SkPMColor4f::FromBytes_RGBA(output);
SkPMColor4f expected4f;
if (fp->hasConstantOutputForConstantInput(input4f, &expected4f)) {
float rDiff = fabsf(output4f.fR - expected4f.fR);
float gDiff = fabsf(output4f.fG - expected4f.fG);
float bDiff = fabsf(output4f.fB - expected4f.fB);
float aDiff = fabsf(output4f.fA - expected4f.fA);
static constexpr float kTol = 4 / 255.f;
if (rDiff > kTol || gDiff > kTol || bDiff > kTol || aDiff > kTol) {
if (constMessage.isEmpty()) {
passing = false;
constMessage.printf("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.fR, input4f.fG, input4f.fB, input4f.fA,
output4f.fR, output4f.fG, output4f.fB, output4f.fA,
expected4f.fR, expected4f.fG, expected4f.fB, expected4f.fA);
}
}
}
if (input4f.isOpaque() && fp->preservesOpaqueInput() && !output4f.isOpaque()) {
passing = false;
if (opaqueMessage.isEmpty()) {
opaqueMessage.printf("Processor %s claimed opaqueness is preserved but "
"it is not. Input: 0x%08x, Output: 0x%08x.",
fp->name(), input, output);
}
}
if (!passing) {
// Regardless of how many optimizations the pixel violates, count it as a
// single bad pixel.
failedPixelCount++;
}
}
}
// Finished analyzing the entire image, see if the number of pixel failures meets the
// threshold for an FP violating the optimization requirements.
if (failedPixelCount > kMaxAcceptableFailedPixels) {
ERRORF(reporter, "Processor violated %d of %d pixels, seed: 0x%08x, processor: %s"
", first failing pixel details are below:",
failedPixelCount, kRenderSize * kRenderSize, seed,
fp->dumpInfo().c_str());
// Print first failing pixel's details.
if (!coverageMessage.isEmpty()) {
ERRORF(reporter, coverageMessage.c_str());
}
if (!constMessage.isEmpty()) {
ERRORF(reporter, constMessage.c_str());
}
if (!opaqueMessage.isEmpty()) {
ERRORF(reporter, opaqueMessage.c_str());
}
if (!loggedFirstFailure) {
// Print with ERRORF to make sure the encoded image is output
SkString input;
log_surface_proxy(context, inputTexture1, &input);
SkString output;
log_surface_context(rtc, &output);
ERRORF(reporter, "Input image: %s\n\n"
"===========================================================\n\n"
"Output image: %s\n", input.c_str(), output.c_str());
loggedFirstFailure = true;
}
} else if(failedPixelCount > 0) {
// Don't trigger an error, but don't just hide the failures either.
INFOF(reporter, "Processor violated %d of %d pixels (below error threshold), seed: "
"0x%08x, processor: %s", failedPixelCount, kRenderSize * kRenderSize,
seed, fp->dumpInfo().c_str());
if (!coverageMessage.isEmpty()) {
INFOF(reporter, coverageMessage.c_str());
}
if (!constMessage.isEmpty()) {
INFOF(reporter, constMessage.c_str());
}
if (!opaqueMessage.isEmpty()) {
INFOF(reporter, opaqueMessage.c_str());
}
if (!loggedFirstWarning) {
SkString input;
log_surface_proxy(context, inputTexture1, &input);
SkString output;
log_surface_context(rtc, &output);
INFOF(reporter, "Input image: %s\n\n"
"===========================================================\n\n"
"Output image: %s\n", input.c_str(), output.c_str());
loggedFirstWarning = true;
}
}
}
}
}
// 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();
GrProxyProvider* proxyProvider = context->priv().proxyProvider();
auto resourceProvider = context->priv().resourceProvider();
SkRandom random;
const GrBackendFormat format =
context->priv().caps()->getBackendFormatFromColorType(kRGBA_8888_SkColorType);
// Make the destination context for the test.
static constexpr int kRenderSize = 1024;
sk_sp<GrRenderTargetContext> rtc = context->priv().makeDeferredRenderTargetContext(
format, SkBackingFit::kExact, kRenderSize, kRenderSize, kRGBA_8888_GrPixelConfig,
nullptr);
sk_sp<GrTextureProxy> proxies[2];
if (!init_test_textures(proxyProvider, &random, proxies)) {
ERRORF(reporter, "Could not create test textures");
return;
}
GrProcessorTestData testData(&random, context, rtc.get(), proxies);
auto inputTexture = make_input_texture(proxyProvider, kRenderSize, kRenderSize, 0.0f);
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(resourceProvider) || !clone->instantiate(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.
render_fp(context, rtc.get(), fp.get(), inputTexture, readData1.get());
// Draw with clone and read back the results.
render_fp(context, rtc.get(), clone.get(), inputTexture, readData2.get());
// 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, 0.0f), readData1[idx], readData2[idx]);
passing = false;
}
}
}
}
}
}
#endif // GR_TEST_UTILS
#endif // SK_ALLOW_STATIC_GLOBAL_INITIALIZERS
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