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skia2/gm/fwidth_squircle.cpp
Greg Daniel d358cbebd4 Add support for plumbing GrDstSampleType through Ops and Pipeline creation. 
This CL adds a new type GrDstSampleType to say how we will sample the dst.

We add tracking of the GrDstSampleType in the recording of GrOps and
then during execution passing the information along to the GrPipeline.

In general the tracking of GrDstSampleType is a global state of a GrOpsTask
so it is kept separate fro the DstProxyView which is more specific to a
single Op on the GrOpsTask.

Bug: skia:10409
Change-Id: Ie843c31f2e48a887daf96cee99ed159b196cb545
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/315645
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2020-09-11 14:42:34 +00:00

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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkString.h"
#include "include/gpu/GrRecordingContext.h"
#include "include/private/GrTypesPriv.h"
#include "src/gpu/GrBuffer.h"
#include "src/gpu/GrCaps.h"
#include "src/gpu/GrContextPriv.h"
#include "src/gpu/GrGeometryProcessor.h"
#include "src/gpu/GrGpuBuffer.h"
#include "src/gpu/GrMemoryPool.h"
#include "src/gpu/GrOpFlushState.h"
#include "src/gpu/GrOpsRenderPass.h"
#include "src/gpu/GrPipeline.h"
#include "src/gpu/GrPrimitiveProcessor.h"
#include "src/gpu/GrProcessor.h"
#include "src/gpu/GrProcessorSet.h"
#include "src/gpu/GrProgramInfo.h"
#include "src/gpu/GrRecordingContextPriv.h"
#include "src/gpu/GrRenderTargetContext.h"
#include "src/gpu/GrRenderTargetContextPriv.h"
#include "src/gpu/GrResourceProvider.h"
#include "src/gpu/GrShaderCaps.h"
#include "src/gpu/GrShaderVar.h"
#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
#include "src/gpu/glsl/GrGLSLGeometryProcessor.h"
#include "src/gpu/glsl/GrGLSLPrimitiveProcessor.h"
#include "src/gpu/glsl/GrGLSLProgramDataManager.h"
#include "src/gpu/glsl/GrGLSLUniformHandler.h"
#include "src/gpu/glsl/GrGLSLVarying.h"
#include "src/gpu/glsl/GrGLSLVertexGeoBuilder.h"
#include "src/gpu/ops/GrDrawOp.h"
#include "src/gpu/ops/GrOp.h"
#include "tools/gpu/ProxyUtils.h"
#include <memory>
#include <utility>
class GrAppliedClip;
/**
* This test ensures that fwidth() works properly on GPU configs by drawing a squircle.
*/
namespace skiagm {
static constexpr GrGeometryProcessor::Attribute gVertex =
{"bboxcoord", kFloat2_GrVertexAttribType, kFloat2_GrSLType};
////////////////////////////////////////////////////////////////////////////////////////////////////
// SkSL code.
class FwidthSquircleTestProcessor : public GrGeometryProcessor {
public:
static GrGeometryProcessor* Make(SkArenaAlloc* arena, const SkMatrix& viewMatrix) {
return arena->make<FwidthSquircleTestProcessor>(viewMatrix);
}
const char* name() const override { return "FwidthSquircleTestProcessor"; }
void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const final {}
GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const final;
private:
friend class ::SkArenaAlloc; // for access to ctor
FwidthSquircleTestProcessor(const SkMatrix& viewMatrix)
: GrGeometryProcessor(kFwidthSquircleTestProcessor_ClassID)
, fViewMatrix(viewMatrix) {
this->setVertexAttributes(&gVertex, 1);
}
const SkMatrix fViewMatrix;
class Impl;
using INHERITED = GrGeometryProcessor;
};
class FwidthSquircleTestProcessor::Impl : public GrGLSLGeometryProcessor {
void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {
const auto& proc = args.fGP.cast<FwidthSquircleTestProcessor>();
auto* uniforms = args.fUniformHandler;
fViewMatrixHandle = uniforms->addUniform(nullptr, kVertex_GrShaderFlag, kFloat3x3_GrSLType,
"viewmatrix");
auto* varyings = args.fVaryingHandler;
varyings->emitAttributes(proc);
GrGLSLVarying squircleCoord(kFloat2_GrSLType);
varyings->addVarying("bboxcoord", &squircleCoord);
auto* v = args.fVertBuilder;
v->codeAppendf("float2x2 R = float2x2(cos(.05), sin(.05), -sin(.05), cos(.05));");
v->codeAppendf("%s = bboxcoord * 1.25;", squircleCoord.vsOut());
v->codeAppendf("float3 vertexpos = float3(bboxcoord * 100 * R + 100, 1);");
v->codeAppendf("vertexpos = %s * vertexpos;", uniforms->getUniformCStr(fViewMatrixHandle));
gpArgs->fPositionVar.set(kFloat3_GrSLType, "vertexpos");
auto* f = args.fFragBuilder;
f->codeAppendf("float golden_ratio = 1.61803398875;");
f->codeAppendf("float pi = 3.141592653589793;");
f->codeAppendf("float x = abs(%s.x), y = abs(%s.y);",
squircleCoord.fsIn(), squircleCoord.fsIn());
// Squircle function!
f->codeAppendf("float fn = half(pow(x, golden_ratio*pi) + pow(y, golden_ratio*pi) - 1);");
f->codeAppendf("float fnwidth = fwidth(fn);");
f->codeAppendf("fnwidth += 1e-10;"); // Guard against divide-by-zero.
f->codeAppendf("half coverage = clamp(half(.5 - fn/fnwidth), 0, 1);");
f->codeAppendf("%s = half4(.51, .42, .71, 1) * .89;", args.fOutputColor);
f->codeAppendf("%s = half4(coverage);", args.fOutputCoverage);
}
void setData(const GrGLSLProgramDataManager& pdman,
const GrPrimitiveProcessor& primProc) override {
const auto& proc = primProc.cast<FwidthSquircleTestProcessor>();
pdman.setSkMatrix(fViewMatrixHandle, proc.fViewMatrix);
}
UniformHandle fViewMatrixHandle;
};
GrGLSLPrimitiveProcessor* FwidthSquircleTestProcessor::createGLSLInstance(
const GrShaderCaps&) const {
return new Impl();
}
////////////////////////////////////////////////////////////////////////////////////////////////////
// Draw Op.
class FwidthSquircleTestOp : public GrDrawOp {
public:
DEFINE_OP_CLASS_ID
static std::unique_ptr<GrDrawOp> Make(GrRecordingContext* ctx, const SkMatrix& viewMatrix) {
GrOpMemoryPool* pool = ctx->priv().opMemoryPool();
return pool->allocate<FwidthSquircleTestOp>(viewMatrix);
}
private:
FwidthSquircleTestOp(const SkMatrix& viewMatrix)
: GrDrawOp(ClassID())
, fViewMatrix(viewMatrix) {
this->setBounds(SkRect::MakeIWH(kWidth, kHeight), HasAABloat::kNo, IsHairline::kNo);
}
const char* name() const override { return "FwidthSquircleTestOp"; }
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*,
bool hasMixedSampledCoverage, GrClampType) override {
return GrProcessorSet::EmptySetAnalysis();
}
GrProgramInfo* createProgramInfo(const GrCaps* caps,
SkArenaAlloc* arena,
const GrSurfaceProxyView* writeView,
GrAppliedClip&& appliedClip,
const GrXferProcessor::DstProxyView& dstProxyView,
GrXferBarrierFlags renderPassXferBarriers) const {
GrGeometryProcessor* geomProc = FwidthSquircleTestProcessor::Make(arena, fViewMatrix);
return sk_gpu_test::CreateProgramInfo(caps, arena, writeView,
std::move(appliedClip), dstProxyView,
geomProc, SkBlendMode::kSrcOver,
GrPrimitiveType::kTriangleStrip,
renderPassXferBarriers);
}
GrProgramInfo* createProgramInfo(GrOpFlushState* flushState) const {
return this->createProgramInfo(&flushState->caps(),
flushState->allocator(),
flushState->writeView(),
flushState->detachAppliedClip(),
flushState->dstProxyView(),
flushState->renderPassBarriers());
}
void onPrePrepare(GrRecordingContext* context,
const GrSurfaceProxyView* writeView,
GrAppliedClip* clip,
const GrXferProcessor::DstProxyView& dstProxyView,
GrXferBarrierFlags renderPassXferBarriers) final {
SkArenaAlloc* arena = context->priv().recordTimeAllocator();
// This is equivalent to a GrOpFlushState::detachAppliedClip
GrAppliedClip appliedClip = clip ? std::move(*clip) : GrAppliedClip::Disabled();
fProgramInfo = this->createProgramInfo(context->priv().caps(), arena, writeView,
std::move(appliedClip), dstProxyView,
renderPassXferBarriers);
context->priv().recordProgramInfo(fProgramInfo);
}
void onPrepare(GrOpFlushState* flushState) final {
SkPoint vertices[4] = {
{-1, -1},
{+1, -1},
{-1, +1},
{+1, +1},
};
fVertexBuffer = flushState->resourceProvider()->createBuffer(
sizeof(vertices), GrGpuBufferType::kVertex, kStatic_GrAccessPattern, vertices);
}
void onExecute(GrOpFlushState* flushState, const SkRect& chainBounds) final {
if (!fVertexBuffer) {
return;
}
if (!fProgramInfo) {
fProgramInfo = this->createProgramInfo(flushState);
}
flushState->bindPipeline(*fProgramInfo, SkRect::MakeIWH(kWidth, kHeight));
flushState->bindBuffers(nullptr, nullptr, std::move(fVertexBuffer));
flushState->draw(4, 0);
}
static const int kWidth = 200;
static const int kHeight = 200;
sk_sp<GrBuffer> fVertexBuffer;
const SkMatrix fViewMatrix;
// The program info (and both the GrPipeline and GrPrimitiveProcessor it relies on), when
// allocated, are allocated in either the ddl-record-time or flush-time arena. It is the
// arena's job to free up their memory so we just have a bare programInfo pointer here. We
// don't even store the GrPipeline and GrPrimitiveProcessor pointers here bc they are
// guaranteed to have the same lifetime as the program info.
GrProgramInfo* fProgramInfo = nullptr;
friend class ::GrOpMemoryPool; // for ctor
using INHERITED = GrDrawOp;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
// Test.
DEF_SIMPLE_GPU_GM_CAN_FAIL(fwidth_squircle, ctx, rtc, canvas, errorMsg, 200, 200) {
if (!ctx->priv().caps()->shaderCaps()->shaderDerivativeSupport()) {
*errorMsg = "Shader derivatives not supported.";
return DrawResult::kSkip;
}
// Draw the test directly to the frame buffer.
canvas->clear(SK_ColorWHITE);
rtc->priv().testingOnly_addDrawOp(FwidthSquircleTestOp::Make(ctx, canvas->getTotalMatrix()));
return skiagm::DrawResult::kOk;
}
} // namespace skiagm
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