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skia2/tests/GrMeshTest.cpp
Brian Salomon dbf7072a59 Use different classes for client side arrays and GPU buffer objects. 
GrBuffer is a base class for GrGpuBuffer and GrCpuBuffer. GrGpuBuffer is a
GrGpuResource and the others are not. This allows GrCpuBuffers to exist
outside of the GrGpuResourceCache.

Also removes flags from GrResourceProvider buffer factory function. The
only flag still in use was kRequireGpuMemory. Now CPU buffers are made
without using GrResourceProvider.

Change-Id: I82670d1316e28fd6331ca36b26c8c4ead33846f9
Reviewed-on: https://skia-review.googlesource.com/c/188823
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2019-02-07 18:04:15 +00:00

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/*
* Copyright 2017 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 <array>
#include <vector>
#include "GrCaps.h"
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrGeometryProcessor.h"
#include "GrGpuCommandBuffer.h"
#include "GrMemoryPool.h"
#include "GrOpFlushState.h"
#include "GrRenderTargetContext.h"
#include "GrRenderTargetContextPriv.h"
#include "GrResourceKey.h"
#include "GrResourceProvider.h"
#include "SkBitmap.h"
#include "SkMakeUnique.h"
#include "glsl/GrGLSLFragmentShaderBuilder.h"
#include "glsl/GrGLSLGeometryProcessor.h"
#include "glsl/GrGLSLVarying.h"
#include "glsl/GrGLSLVertexGeoBuilder.h"
GR_DECLARE_STATIC_UNIQUE_KEY(gIndexBufferKey);
static constexpr int kBoxSize = 2;
static constexpr int kBoxCountY = 8;
static constexpr int kBoxCountX = 8;
static constexpr int kBoxCount = kBoxCountY * kBoxCountX;
static constexpr int kImageWidth = kBoxCountY * kBoxSize;
static constexpr int kImageHeight = kBoxCountX * kBoxSize;
static constexpr int kIndexPatternRepeatCount = 3;
constexpr uint16_t kIndexPattern[6] = {0, 1, 2, 1, 2, 3};
class DrawMeshHelper {
public:
DrawMeshHelper(GrOpFlushState* state) : fState(state) {}
sk_sp<const GrBuffer> getIndexBuffer();
template<typename T> sk_sp<const GrBuffer> makeVertexBuffer(const SkTArray<T>& data) {
return this->makeVertexBuffer(data.begin(), data.count());
}
template<typename T> sk_sp<const GrBuffer> makeVertexBuffer(const std::vector<T>& data) {
return this->makeVertexBuffer(data.data(), data.size());
}
template<typename T> sk_sp<const GrBuffer> makeVertexBuffer(const T* data, int count);
void drawMesh(const GrMesh& mesh);
private:
GrOpFlushState* fState;
};
struct Box {
float fX, fY;
GrColor fColor;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* This is a GPU-backend specific test. It tries to test all possible usecases of GrMesh. The test
* works by drawing checkerboards of colored boxes, reading back the pixels, and comparing with
* expected results. The boxes are drawn on integer boundaries and the (opaque) colors are chosen
* from the set (r,g,b) = (0,255)^3, so the GPU renderings ought to produce exact matches.
*/
static void run_test(GrContext* context, const char* testName, skiatest::Reporter*,
const sk_sp<GrRenderTargetContext>&, const SkBitmap& gold,
std::function<void(DrawMeshHelper*)> testFn);
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(GrMeshTest, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
const GrBackendFormat format =
context->priv().caps()->getBackendFormatFromColorType(kRGBA_8888_SkColorType);
sk_sp<GrRenderTargetContext> rtc(context->priv().makeDeferredRenderTargetContext(
format, SkBackingFit::kExact, kImageWidth, kImageHeight, kRGBA_8888_GrPixelConfig,
nullptr));
if (!rtc) {
ERRORF(reporter, "could not create render target context.");
return;
}
SkTArray<Box> boxes;
SkTArray<std::array<Box, 4>> vertexData;
SkBitmap gold;
// ---- setup ----------
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc);
gold.allocN32Pixels(kImageWidth, kImageHeight);
SkCanvas goldCanvas(gold);
for (int y = 0; y < kBoxCountY; ++y) {
for (int x = 0; x < kBoxCountX; ++x) {
int c = y + x;
int rgb[3] = {-(c & 1) & 0xff, -((c >> 1) & 1) & 0xff, -((c >> 2) & 1) & 0xff};
const Box box = boxes.push_back() = {
float(x * kBoxSize),
float(y * kBoxSize),
GrColorPackRGBA(rgb[0], rgb[1], rgb[2], 255)
};
std::array<Box, 4>& boxVertices = vertexData.push_back();
for (int i = 0; i < 4; ++i) {
boxVertices[i] = {
box.fX + (i / 2) * kBoxSize,
box.fY + (i % 2) * kBoxSize,
box.fColor
};
}
paint.setARGB(255, rgb[0], rgb[1], rgb[2]);
goldCanvas.drawRect(SkRect::MakeXYWH(box.fX, box.fY, kBoxSize, kBoxSize), paint);
}
}
goldCanvas.flush();
// ---- tests ----------
#define VALIDATE(buff) \
do { \
if (!buff) { \
ERRORF(reporter, #buff " is null."); \
return; \
} \
} while (0)
run_test(context, "setNonIndexedNonInstanced", reporter, rtc, gold,
[&](DrawMeshHelper* helper) {
SkTArray<Box> expandedVertexData;
for (int i = 0; i < kBoxCount; ++i) {
for (int j = 0; j < 6; ++j) {
expandedVertexData.push_back(vertexData[i][kIndexPattern[j]]);
}
}
// Draw boxes one line at a time to exercise base vertex.
auto vbuff = helper->makeVertexBuffer(expandedVertexData);
VALIDATE(vbuff);
for (int y = 0; y < kBoxCountY; ++y) {
GrMesh mesh(GrPrimitiveType::kTriangles);
mesh.setNonIndexedNonInstanced(kBoxCountX * 6);
mesh.setVertexData(vbuff, y * kBoxCountX * 6);
helper->drawMesh(mesh);
}
});
run_test(context, "setIndexed", reporter, rtc, gold, [&](DrawMeshHelper* helper) {
auto ibuff = helper->getIndexBuffer();
VALIDATE(ibuff);
auto vbuff = helper->makeVertexBuffer(vertexData);
VALIDATE(vbuff);
int baseRepetition = 0;
int i = 0;
// Start at various repetitions within the patterned index buffer to exercise base index.
while (i < kBoxCount) {
GR_STATIC_ASSERT(kIndexPatternRepeatCount >= 3);
int repetitionCount = SkTMin(3 - baseRepetition, kBoxCount - i);
GrMesh mesh(GrPrimitiveType::kTriangles);
mesh.setIndexed(ibuff, repetitionCount * 6, baseRepetition * 6, baseRepetition * 4,
(baseRepetition + repetitionCount) * 4 - 1, GrPrimitiveRestart::kNo);
mesh.setVertexData(vbuff, (i - baseRepetition) * 4);
helper->drawMesh(mesh);
baseRepetition = (baseRepetition + 1) % 3;
i += repetitionCount;
}
});
run_test(context, "setIndexedPatterned", reporter, rtc, gold, [&](DrawMeshHelper* helper) {
auto ibuff = helper->getIndexBuffer();
VALIDATE(ibuff);
auto vbuff = helper->makeVertexBuffer(vertexData);
VALIDATE(vbuff);
// Draw boxes one line at a time to exercise base vertex. setIndexedPatterned does not
// support a base index.
for (int y = 0; y < kBoxCountY; ++y) {
GrMesh mesh(GrPrimitiveType::kTriangles);
mesh.setIndexedPatterned(ibuff, 6, 4, kBoxCountX, kIndexPatternRepeatCount);
mesh.setVertexData(vbuff, y * kBoxCountX * 4);
helper->drawMesh(mesh);
}
});
for (bool indexed : {false, true}) {
if (!context->priv().caps()->instanceAttribSupport()) {
break;
}
run_test(context, indexed ? "setIndexedInstanced" : "setInstanced",
reporter, rtc, gold, [&](DrawMeshHelper* helper) {
auto idxbuff = indexed ? helper->getIndexBuffer() : nullptr;
auto instbuff = helper->makeVertexBuffer(boxes);
VALIDATE(instbuff);
auto vbuff = helper->makeVertexBuffer(std::vector<float>{0,0, 0,1, 1,0, 1,1});
VALIDATE(vbuff);
auto vbuff2 = helper->makeVertexBuffer( // for testing base vertex.
std::vector<float>{-1,-1, -1,-1, 0,0, 0,1, 1,0, 1,1});
VALIDATE(vbuff2);
// Draw boxes one line at a time to exercise base instance, base vertex, and null vertex
// buffer. setIndexedInstanced intentionally does not support a base index.
for (int y = 0; y < kBoxCountY; ++y) {
GrMesh mesh(indexed ? GrPrimitiveType::kTriangles
: GrPrimitiveType::kTriangleStrip);
if (indexed) {
VALIDATE(idxbuff);
mesh.setIndexedInstanced(idxbuff, 6, instbuff, kBoxCountX, y * kBoxCountX,
GrPrimitiveRestart::kNo);
} else {
mesh.setInstanced(instbuff, kBoxCountX, y * kBoxCountX, 4);
}
switch (y % 3) {
case 0:
if (context->priv().caps()->shaderCaps()->vertexIDSupport()) {
if (y % 2) {
// We don't need this call because it's the initial state of GrMesh.
mesh.setVertexData(nullptr);
}
break;
}
// Fallthru.
case 1:
mesh.setVertexData(vbuff);
break;
case 2:
mesh.setVertexData(vbuff2, 2);
break;
}
helper->drawMesh(mesh);
}
});
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
class GrMeshTestOp : public GrDrawOp {
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(GrContext* context,
std::function<void(DrawMeshHelper*)> testFn) {
GrOpMemoryPool* pool = context->priv().opMemoryPool();
return pool->allocate<GrMeshTestOp>(testFn);
}
private:
friend class GrOpMemoryPool; // for ctor
GrMeshTestOp(std::function<void(DrawMeshHelper*)> testFn)
: INHERITED(ClassID())
, fTestFn(testFn) {
this->setBounds(SkRect::MakeIWH(kImageWidth, kImageHeight),
HasAABloat::kNo, IsZeroArea::kNo);
}
const char* name() const override { return "GrMeshTestOp"; }
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*) override {
return GrProcessorSet::EmptySetAnalysis();
}
void onPrepare(GrOpFlushState*) override {}
void onExecute(GrOpFlushState* state, const SkRect& chainBounds) override {
DrawMeshHelper helper(state);
fTestFn(&helper);
}
std::function<void(DrawMeshHelper*)> fTestFn;
typedef GrDrawOp INHERITED;
};
class GrMeshTestProcessor : public GrGeometryProcessor {
public:
GrMeshTestProcessor(bool instanced, bool hasVertexBuffer)
: INHERITED(kGrMeshTestProcessor_ClassID) {
if (instanced) {
fInstanceLocation = {"location", kFloat2_GrVertexAttribType, kHalf2_GrSLType};
fInstanceColor = {"color", kUByte4_norm_GrVertexAttribType, kHalf4_GrSLType};
this->setInstanceAttributes(&fInstanceLocation, 2);
if (hasVertexBuffer) {
fVertexPosition = {"vertex", kFloat2_GrVertexAttribType, kHalf2_GrSLType};
this->setVertexAttributes(&fVertexPosition, 1);
}
} else {
fVertexPosition = {"vertex", kFloat2_GrVertexAttribType, kHalf2_GrSLType};
fVertexColor = {"color", kUByte4_norm_GrVertexAttribType, kHalf4_GrSLType};
this->setVertexAttributes(&fVertexPosition, 2);
}
}
const char* name() const override { return "GrMeshTest Processor"; }
const Attribute& inColor() const {
return fVertexColor.isInitialized() ? fVertexColor : fInstanceColor;
}
void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const final {
b->add32(fInstanceLocation.isInitialized());
b->add32(fVertexPosition.isInitialized());
}
GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const final;
private:
Attribute fVertexPosition;
Attribute fVertexColor;
Attribute fInstanceLocation;
Attribute fInstanceColor;
friend class GLSLMeshTestProcessor;
typedef GrGeometryProcessor INHERITED;
};
class GLSLMeshTestProcessor : public GrGLSLGeometryProcessor {
void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor&,
FPCoordTransformIter&& transformIter) final {}
void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) final {
const GrMeshTestProcessor& mp = args.fGP.cast<GrMeshTestProcessor>();
GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
varyingHandler->emitAttributes(mp);
varyingHandler->addPassThroughAttribute(mp.inColor(), args.fOutputColor);
GrGLSLVertexBuilder* v = args.fVertBuilder;
if (!mp.fInstanceLocation.isInitialized()) {
v->codeAppendf("float2 vertex = %s;", mp.fVertexPosition.name());
} else {
if (mp.fVertexPosition.isInitialized()) {
v->codeAppendf("float2 offset = %s;", mp.fVertexPosition.name());
} else {
v->codeAppend ("float2 offset = float2(sk_VertexID / 2, sk_VertexID % 2);");
}
v->codeAppendf("float2 vertex = %s + offset * %i;", mp.fInstanceLocation.name(),
kBoxSize);
}
gpArgs->fPositionVar.set(kFloat2_GrSLType, "vertex");
GrGLSLFPFragmentBuilder* f = args.fFragBuilder;
f->codeAppendf("%s = half4(1);", args.fOutputCoverage);
}
};
GrGLSLPrimitiveProcessor* GrMeshTestProcessor::createGLSLInstance(const GrShaderCaps&) const {
return new GLSLMeshTestProcessor;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
template<typename T>
sk_sp<const GrBuffer> DrawMeshHelper::makeVertexBuffer(const T* data, int count) {
return sk_sp<const GrBuffer>(fState->resourceProvider()->createBuffer(
count * sizeof(T), GrGpuBufferType::kVertex, kDynamic_GrAccessPattern, data));
}
sk_sp<const GrBuffer> DrawMeshHelper::getIndexBuffer() {
GR_DEFINE_STATIC_UNIQUE_KEY(gIndexBufferKey);
return fState->resourceProvider()->findOrCreatePatternedIndexBuffer(
kIndexPattern, 6, kIndexPatternRepeatCount, 4, gIndexBufferKey);
}
void DrawMeshHelper::drawMesh(const GrMesh& mesh) {
GrPipeline pipeline(GrScissorTest::kDisabled, SkBlendMode::kSrc);
GrMeshTestProcessor mtp(mesh.isInstanced(), mesh.hasVertexData());
fState->rtCommandBuffer()->draw(mtp, pipeline, nullptr, nullptr, &mesh, 1,
SkRect::MakeIWH(kImageWidth, kImageHeight));
}
static void run_test(GrContext* context, const char* testName, skiatest::Reporter* reporter,
const sk_sp<GrRenderTargetContext>& rtc, const SkBitmap& gold,
std::function<void(DrawMeshHelper*)> testFn) {
const int w = gold.width(), h = gold.height(), rowBytes = gold.rowBytes();
const uint32_t* goldPx = reinterpret_cast<const uint32_t*>(gold.getPixels());
if (h != rtc->height() || w != rtc->width()) {
ERRORF(reporter, "[%s] expectation and rtc not compatible (?).", testName);
return;
}
if (sizeof(uint32_t) * kImageWidth != gold.rowBytes()) {
ERRORF(reporter, "unexpected row bytes in gold image.", testName);
return;
}
SkAutoSTMalloc<kImageHeight * kImageWidth, uint32_t> resultPx(h * rowBytes);
rtc->clear(nullptr, SkPMColor4f::FromBytes_RGBA(0xbaaaaaad),
GrRenderTargetContext::CanClearFullscreen::kYes);
rtc->priv().testingOnly_addDrawOp(GrMeshTestOp::Make(context, testFn));
rtc->readPixels(gold.info(), resultPx, rowBytes, 0, 0, 0);
for (int y = 0; y < h; ++y) {
for (int x = 0; x < w; ++x) {
uint32_t expected = goldPx[y * kImageWidth + x];
uint32_t actual = resultPx[y * kImageWidth + x];
if (expected != actual) {
ERRORF(reporter, "[%s] pixel (%i,%i): got 0x%x expected 0x%x",
testName, x, y, actual, expected);
return;
}
}
}
}
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