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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 "SkPoint.h"
#include "Test.h"
#include <vector>
#if SK_SUPPORT_GPU
#include "GrAppliedClip.h"
#include "GrRenderTargetContext.h"
#include "GrRenderTargetPriv.h"
#include "GrTypesPriv.h"
#include "gl/GrGLGpu.h"
#include "gl/debug/DebugGLTestContext.h"
typedef std::vector<SkPoint> SamplePattern;
static const SamplePattern kTestPatterns[] = {
SamplePattern{ // Intel on mac, msaa8, offscreen.
{0.562500, 0.312500},
{0.437500, 0.687500},
{0.812500, 0.562500},
{0.312500, 0.187500},
{0.187500, 0.812500},
{0.062500, 0.437500},
{0.687500, 0.937500},
{0.937500, 0.062500}
},
SamplePattern{ // Intel on mac, msaa8, on-screen.
{0.562500, 0.687500},
{0.437500, 0.312500},
{0.812500, 0.437500},
{0.312500, 0.812500},
{0.187500, 0.187500},
{0.062500, 0.562500},
{0.687500, 0.062500},
{0.937500, 0.937500}
},
SamplePattern{ // NVIDIA, msaa16.
{0.062500, 0.000000},
{0.250000, 0.125000},
{0.187500, 0.375000},
{0.437500, 0.312500},
{0.500000, 0.062500},
{0.687500, 0.187500},
{0.750000, 0.437500},
{0.937500, 0.250000},
{0.000000, 0.500000},
{0.312500, 0.625000},
{0.125000, 0.750000},
{0.375000, 0.875000},
{0.562500, 0.562500},
{0.812500, 0.687500},
{0.625000, 0.812500},
{0.875000, 0.937500}
},
SamplePattern{ // NVIDIA, mixed samples, 16:1.
{0.250000, 0.125000},
{0.625000, 0.812500},
{0.500000, 0.062500},
{0.812500, 0.687500},
{0.187500, 0.375000},
{0.875000, 0.937500},
{0.125000, 0.750000},
{0.750000, 0.437500},
{0.937500, 0.250000},
{0.312500, 0.625000},
{0.437500, 0.312500},
{0.000000, 0.500000},
{0.375000, 0.875000},
{0.687500, 0.187500},
{0.062500, 0.000000},
{0.562500, 0.562500}
}
};
constexpr int numTestPatterns = SK_ARRAY_COUNT(kTestPatterns);
class TestSampleLocationsInterface : public SkNoncopyable {
public:
virtual void overrideSamplePattern(const SamplePattern&) = 0;
virtual ~TestSampleLocationsInterface() {}
};
void assert_equal(skiatest::Reporter* reporter, const SamplePattern& pattern,
const GrGpu::MultisampleSpecs& specs, bool flipY) {
GrAlwaysAssert(specs.fSampleLocations);
if ((int)pattern.size() != specs.fEffectiveSampleCnt) {
REPORT_FAILURE(reporter, "", SkString("Sample pattern has wrong number of samples."));
return;
}
for (int i = 0; i < specs.fEffectiveSampleCnt; ++i) {
SkPoint expectedLocation = specs.fSampleLocations[i];
if (flipY) {
expectedLocation.fY = 1 - expectedLocation.fY;
}
if (pattern[i] != expectedLocation) {
REPORT_FAILURE(reporter, "", SkString("Sample pattern has wrong sample location."));
return;
}
}
}
static int pick_random_sample_count(int testPatternSize, SkRandom* rand, const GrCaps* caps) {
GrAlwaysAssert(testPatternSize > 1 && SkIsPow2(testPatternSize));
int randSampCnt = rand->nextRangeU(1 + testPatternSize / 2, testPatternSize);
do {
int cnt = caps->getSampleCount(randSampCnt, kRGBA_8888_GrPixelConfig);
if (cnt) {
return cnt;
}
--randSampCnt;
} while (randSampCnt);
// This test assumes an MSAA kRGBA_8888 RTC can be created.
GrAlwaysAssert(false);
return 0;
}
void test_sampleLocations(skiatest::Reporter* reporter, TestSampleLocationsInterface* testInterface,
GrContext* ctx) {
SkRandom rand;
sk_sp<GrRenderTargetContext> bottomUps[numTestPatterns];
sk_sp<GrRenderTargetContext> topDowns[numTestPatterns];
for (int i = 0; i < numTestPatterns; ++i) {
int patternSize = (int)kTestPatterns[i].size();
int randNumSamples = pick_random_sample_count(patternSize, &rand, ctx->caps());
bottomUps[i] = ctx->makeDeferredRenderTargetContext(
SkBackingFit::kExact, 100, 100, kRGBA_8888_GrPixelConfig, nullptr, randNumSamples,
GrMipMapped::kNo, kBottomLeft_GrSurfaceOrigin);
randNumSamples = pick_random_sample_count(patternSize, &rand, ctx->caps());
topDowns[i] = ctx->makeDeferredRenderTargetContext(
SkBackingFit::kExact, 100, 100, kRGBA_8888_GrPixelConfig, nullptr, randNumSamples,
GrMipMapped::kNo, kTopLeft_GrSurfaceOrigin);
}
// Ensure all sample locations get queried and/or cached properly.
for (int repeat = 0; repeat < 2; ++repeat) {
for (int i = 0; i < numTestPatterns; ++i) {
testInterface->overrideSamplePattern(kTestPatterns[i]);
for (GrRenderTargetContext* rtc : {bottomUps[i].get(), topDowns[i].get()}) {
GrPipeline dummyPipeline(rtc->asRenderTargetProxy(),
GrPipeline::ScissorState::kDisabled,
SkBlendMode::kSrcOver);
GrRenderTarget* rt = rtc->accessRenderTarget();
assert_equal(reporter, kTestPatterns[i],
rt->renderTargetPriv().getMultisampleSpecs(dummyPipeline),
kBottomLeft_GrSurfaceOrigin == rtc->asSurfaceProxy()->origin());
}
}
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
class GLTestSampleLocationsInterface : public TestSampleLocationsInterface, public GrGLInterface {
public:
GLTestSampleLocationsInterface() : fTestContext(sk_gpu_test::CreateDebugGLTestContext()) {
fStandard = fTestContext->gl()->fStandard;
fExtensions = fTestContext->gl()->fExtensions;
fFunctions = fTestContext->gl()->fFunctions;
fFunctions.fGetIntegerv = [&](GrGLenum pname, GrGLint* params) {
GrAlwaysAssert(GR_GL_EFFECTIVE_RASTER_SAMPLES != pname);
if (GR_GL_SAMPLES == pname) {
GrAlwaysAssert(!fSamplePattern.empty());
*params = (int)fSamplePattern.size();
} else {
fTestContext->gl()->fFunctions.fGetIntegerv(pname, params);
}
};
fFunctions.fGetMultisamplefv = [&](GrGLenum pname, GrGLuint index, GrGLfloat* val) {
GrAlwaysAssert(GR_GL_SAMPLE_POSITION == pname);
val[0] = fSamplePattern[index].fX;
val[1] = fSamplePattern[index].fY;
};
}
operator GrBackendContext() {
return reinterpret_cast<GrBackendContext>(static_cast<GrGLInterface*>(this));
}
void overrideSamplePattern(const SamplePattern& newPattern) override {
fSamplePattern = newPattern;
}
private:
std::unique_ptr<sk_gpu_test::GLTestContext> fTestContext;
SamplePattern fSamplePattern;
};
DEF_GPUTEST(GLSampleLocations, reporter, /* options */) {
auto testInterface = sk_make_sp<GLTestSampleLocationsInterface>();
sk_sp<GrContext> ctx(GrContext::MakeGL(testInterface));
// This test relies on at least 2 samples.
int supportedSample = ctx->caps()->getSampleCount(2, kRGBA_8888_GrPixelConfig);
if (supportedSample < 2) {
return;
}
test_sampleLocations(reporter, testInterface.get(), ctx.get());
}
#endif
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