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skia2/gm/tessellation.cpp
Greg Daniel 426274b880 Add support for holding onto refs for input buffers from bindBuffer calls. 
Mostly this is a lot of plumbing of sk_sp around instead of const*.

This does allow the d3d and vk backends to hold refs to the GrBuffers that
are bound on a command buffer. This means that our buffer alloc pools will
not try to reuse this buffers until the gpu is done with them. Previously
vk and d3d will sniff out if one of these buffers was being used again
while still active on the gpu and rip out the internal backend buffer and
allocate a new one which is not cheap. We see a lot of perf wins from
not doing this.

Change-Id: I9ffe649151ee43066dce620bd3e2763b029a9811
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/303583
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
2020-07-20 18:29:43 +00:00

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/*
* Copyright 2019 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 "src/gpu/GrCaps.h"
#include "src/gpu/GrContextPriv.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/GrProgramInfo.h"
#include "src/gpu/GrRecordingContextPriv.h"
#include "src/gpu/GrRenderTargetContext.h"
#include "src/gpu/GrRenderTargetContextPriv.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/GrGLSLVarying.h"
#include "src/gpu/glsl/GrGLSLVertexGeoBuilder.h"
#include "src/gpu/ops/GrDrawOp.h"
namespace skiagm {
constexpr static GrGeometryProcessor::Attribute kPositionAttrib =
{"position", kFloat3_GrVertexAttribType, kFloat3_GrSLType};
constexpr static std::array<float, 3> kTri1[3] = {
{20.5f,20.5f,1}, {170.5f,280.5f,4}, {320.5f,20.5f,1}};
constexpr static std::array<float, 3> kTri2[3] = {
{640.5f,280.5f,3}, {490.5f,20.5f,1}, {340.5f,280.5f,6}};
constexpr static SkRect kRect = {20.5f, 340.5f, 640.5f, 480.5f};
constexpr static int kWidth = (int)kRect.fRight + 21;
constexpr static int kHeight = (int)kRect.fBottom + 21;
/**
* This is a GPU-backend specific test. It ensures that tessellation works as expected by drawing
* several triangles. The test passes as long as the triangle tessellations match the reference
* images on gold.
*/
class TessellationGM : public GpuGM {
SkString onShortName() override { return SkString("tessellation"); }
SkISize onISize() override { return {kWidth, kHeight}; }
DrawResult onDraw(GrRecordingContext*, GrRenderTargetContext*, SkCanvas*, SkString*) override;
};
class TessellationTestTriShader : public GrGeometryProcessor {
public:
TessellationTestTriShader(const SkMatrix& viewMatrix)
: GrGeometryProcessor(kTessellationTestTriShader_ClassID), fViewMatrix(viewMatrix) {
this->setVertexAttributes(&kPositionAttrib, 1);
this->setWillUseTessellationShaders();
}
private:
const char* name() const final { return "TessellationTestTriShader"; }
void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const final {}
class Impl : public GrGLSLGeometryProcessor {
void onEmitCode(EmitArgs& args, GrGPArgs*) override {
args.fVaryingHandler->emitAttributes(args.fGP.cast<TessellationTestTriShader>());
const char* viewMatrix;
fViewMatrixUniform = args.fUniformHandler->addUniform(
nullptr, kVertex_GrShaderFlag, kFloat3x3_GrSLType, "view_matrix", &viewMatrix);
args.fVertBuilder->declareGlobal(
GrShaderVar("P_", kFloat3_GrSLType, GrShaderVar::TypeModifier::Out));
args.fVertBuilder->codeAppendf(R"(
P_.xy = (%s * float3(position.xy, 1)).xy;
P_.z = position.z;)", viewMatrix);
// GrGLProgramBuilder will call writeTess*ShaderGLSL when it is compiling.
this->writeFragmentShader(args.fFragBuilder, args.fOutputColor, args.fOutputCoverage);
}
void writeFragmentShader(GrGLSLFPFragmentBuilder*, const char* color, const char* coverage);
void setData(const GrGLSLProgramDataManager& pdman,
const GrPrimitiveProcessor& proc) override {
pdman.setSkMatrix(fViewMatrixUniform,
proc.cast<TessellationTestTriShader>().fViewMatrix);
}
GrGLSLUniformHandler::UniformHandle fViewMatrixUniform;
};
GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const override {
return new Impl;
}
SkString getTessControlShaderGLSL(const GrGLSLPrimitiveProcessor*,
const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&,
const GrShaderCaps&) const override;
SkString getTessEvaluationShaderGLSL(const GrGLSLPrimitiveProcessor*,
const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&,
const GrShaderCaps&) const override;
const SkMatrix fViewMatrix;
};
SkString TessellationTestTriShader::getTessControlShaderGLSL(
const GrGLSLPrimitiveProcessor*, const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&, const GrShaderCaps&) const {
SkString code(versionAndExtensionDecls);
code.append(R"(
layout(vertices = 3) out;
in vec3 P_[];
out vec3 P[];
void main() {
P[gl_InvocationID] = P_[gl_InvocationID];
gl_TessLevelOuter[gl_InvocationID] = P_[gl_InvocationID].z;
gl_TessLevelInner[0] = 2.0;
})");
return code;
}
SkString TessellationTestTriShader::getTessEvaluationShaderGLSL(
const GrGLSLPrimitiveProcessor*, const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&, const GrShaderCaps&) const {
SkString code(versionAndExtensionDecls);
code.append(R"(
layout(triangles, equal_spacing, cw) in;
uniform vec4 sk_RTAdjust;
in vec3 P[];
out vec3 barycentric_coord;
void main() {
vec2 devcoord = mat3x2(P[0].xy, P[1].xy, P[2].xy) * gl_TessCoord.xyz;
devcoord = round(devcoord - .5) + .5; // Make horz and vert lines on px bounds.
gl_Position = vec4(devcoord.xy * sk_RTAdjust.xz + sk_RTAdjust.yw, 0.0, 1.0);
float i = 0.0;
if (gl_TessCoord.y == 0.0) {
i += gl_TessCoord.z * P[1].z;
} else {
i += P[1].z;
if (gl_TessCoord.x == 0.0) {
i += gl_TessCoord.y * P[0].z;
} else {
i += P[0].z;
if (gl_TessCoord.z == 0.0) {
i += gl_TessCoord.x * P[2].z;
} else {
barycentric_coord = vec3(0, 1, 0);
return;
}
}
}
i = abs(mod(i, 2.0) - 1.0);
barycentric_coord = vec3(i, 0, 1.0 - i);
})");
return code;
}
void TessellationTestTriShader::Impl::writeFragmentShader(
GrGLSLFPFragmentBuilder* f, const char* color, const char* coverage) {
f->declareGlobal(
GrShaderVar("barycentric_coord", kFloat3_GrSLType, GrShaderVar::TypeModifier::In));
f->codeAppendf(R"(
half3 d = half3(1 - barycentric_coord/fwidth(barycentric_coord));
half coverage = max(max(d.x, d.y), d.z);
%s = half4(0, coverage, coverage, 1);
%s = half4(1);)", color, coverage);
}
class TessellationTestRectShader : public GrGeometryProcessor {
public:
TessellationTestRectShader(const SkMatrix& viewMatrix)
: GrGeometryProcessor(kTessellationTestTriShader_ClassID), fViewMatrix(viewMatrix) {
this->setWillUseTessellationShaders();
}
private:
const char* name() const final { return "TessellationTestRectShader"; }
void getGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder* b) const final {}
class Impl : public GrGLSLGeometryProcessor {
void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) override {
const char* viewMatrix;
fViewMatrixUniform = args.fUniformHandler->addUniform(
nullptr, kVertex_GrShaderFlag, kFloat3x3_GrSLType, "view_matrix", &viewMatrix);
args.fVertBuilder->declareGlobal(
GrShaderVar("M_", kFloat3x3_GrSLType, GrShaderVar::TypeModifier::Out));
args.fVertBuilder->codeAppendf("M_ = %s;", viewMatrix);
// GrGLProgramBuilder will call writeTess*ShaderGLSL when it is compiling.
this->writeFragmentShader(args.fFragBuilder, args.fOutputColor, args.fOutputCoverage);
}
void writeFragmentShader(GrGLSLFPFragmentBuilder*, const char* color, const char* coverage);
void setData(const GrGLSLProgramDataManager& pdman,
const GrPrimitiveProcessor& proc) override {
pdman.setSkMatrix(fViewMatrixUniform,
proc.cast<TessellationTestRectShader>().fViewMatrix);
}
GrGLSLUniformHandler::UniformHandle fViewMatrixUniform;
};
GrGLSLPrimitiveProcessor* createGLSLInstance(const GrShaderCaps&) const override {
return new Impl;
}
SkString getTessControlShaderGLSL(const GrGLSLPrimitiveProcessor*,
const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&,
const GrShaderCaps&) const override;
SkString getTessEvaluationShaderGLSL(const GrGLSLPrimitiveProcessor*,
const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&,
const GrShaderCaps&) const override;
const SkMatrix fViewMatrix;
};
SkString TessellationTestRectShader::getTessControlShaderGLSL(
const GrGLSLPrimitiveProcessor*, const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&, const GrShaderCaps& caps) const {
SkString code(versionAndExtensionDecls);
code.append(R"(
layout(vertices = 1) out;
in mat3 M_[];
out mat3 M[];
void main() {
M[gl_InvocationID] = M_[gl_InvocationID];
gl_TessLevelInner[0] = 8.0;
gl_TessLevelInner[1] = 2.0;
gl_TessLevelOuter[0] = 2.0;
gl_TessLevelOuter[1] = 8.0;
gl_TessLevelOuter[2] = 2.0;
gl_TessLevelOuter[3] = 8.0;
})");
return code;
}
SkString TessellationTestRectShader::getTessEvaluationShaderGLSL(
const GrGLSLPrimitiveProcessor*, const char* versionAndExtensionDecls,
const GrGLSLUniformHandler&, const GrShaderCaps& caps) const {
SkString code(versionAndExtensionDecls);
code.appendf(R"(
layout(quads, equal_spacing, cw) in;
uniform vec4 sk_RTAdjust;
in mat3 M[];
out vec4 barycentric_coord;
void main() {
vec4 R = vec4(%f, %f, %f, %f);
vec2 localcoord = mix(R.xy, R.zw, gl_TessCoord.xy);
vec2 devcoord = (M[0] * vec3(localcoord, 1)).xy;
devcoord = round(devcoord - .5) + .5; // Make horz and vert lines on px bounds.
gl_Position = vec4(devcoord.xy * sk_RTAdjust.xz + sk_RTAdjust.yw, 0.0, 1.0);
float i = gl_TessCoord.x * 8.0;
i = abs(mod(i, 2.0) - 1.0);
if (gl_TessCoord.y == 0.0 || gl_TessCoord.y == 1.0) {
barycentric_coord = vec4(i, 1.0 - i, 0, 0);
} else {
barycentric_coord = vec4(0, 0, i, 1.0 - i);
}
})", kRect.left(), kRect.top(), kRect.right(), kRect.bottom());
return code;
}
void TessellationTestRectShader::Impl::writeFragmentShader(
GrGLSLFPFragmentBuilder* f, const char* color, const char* coverage) {
f->declareGlobal(GrShaderVar("barycentric_coord", kFloat4_GrSLType,
GrShaderVar::TypeModifier::In));
f->codeAppendf(R"(
float4 fwidths = fwidth(barycentric_coord);
half coverage = 0;
for (int i = 0; i < 4; ++i) {
if (fwidths[i] != 0) {
coverage = half(max(coverage, 1 - barycentric_coord[i]/fwidths[i]));
}
}
%s = half4(coverage, 0, coverage, 1);
%s = half4(1);)", color, coverage);
}
class TessellationTestOp : public GrDrawOp {
DEFINE_OP_CLASS_ID
public:
TessellationTestOp(const SkMatrix& viewMatrix, const std::array<float, 3>* triPositions)
: GrDrawOp(ClassID()), fViewMatrix(viewMatrix), fTriPositions(triPositions) {
this->setBounds(SkRect::MakeIWH(kWidth, kHeight), HasAABloat::kNo, IsHairline::kNo);
}
private:
const char* name() const override { return "TessellationTestOp"; }
FixedFunctionFlags fixedFunctionFlags() const override { return FixedFunctionFlags::kNone; }
GrProcessorSet::Analysis finalize(const GrCaps&, const GrAppliedClip*,
bool hasMixedSampledCoverage, GrClampType) override {
return GrProcessorSet::EmptySetAnalysis();
}
void onPrePrepare(GrRecordingContext*,
const GrSurfaceProxyView* writeView,
GrAppliedClip*,
const GrXferProcessor::DstProxyView&) override {}
void onPrepare(GrOpFlushState* flushState) override {
if (fTriPositions) {
if (void* vertexData = flushState->makeVertexSpace(sizeof(float) * 3, 3, &fVertexBuffer,
&fBaseVertex)) {
memcpy(vertexData, fTriPositions, sizeof(float) * 3 * 3);
}
}
}
void onExecute(GrOpFlushState* state, const SkRect& chainBounds) override {
GrPipeline pipeline(GrScissorTest::kDisabled, SkBlendMode::kSrc,
state->drawOpArgs().writeSwizzle());
int tessellationPatchVertexCount;
std::unique_ptr<GrGeometryProcessor> shader;
if (fTriPositions) {
if (!fVertexBuffer) {
return;
}
tessellationPatchVertexCount = 3;
shader = std::make_unique<TessellationTestTriShader>(fViewMatrix);
} else {
// Use a mismatched number of vertices in the input patch vs output.
// (The tessellation control shader will output one vertex per patch.)
tessellationPatchVertexCount = 5;
shader = std::make_unique<TessellationTestRectShader>(fViewMatrix);
}
GrProgramInfo programInfo(state->proxy()->numSamples(), state->proxy()->numStencilSamples(),
state->proxy()->backendFormat(), state->writeView()->origin(),
&pipeline, shader.get(), GrPrimitiveType::kPatches,
tessellationPatchVertexCount);
state->bindPipeline(programInfo, SkRect::MakeIWH(kWidth, kHeight));
state->bindBuffers(nullptr, nullptr, std::move(fVertexBuffer));
state->draw(tessellationPatchVertexCount, fBaseVertex);
}
const SkMatrix fViewMatrix;
const std::array<float, 3>* const fTriPositions;
sk_sp<const GrBuffer> fVertexBuffer;
int fBaseVertex = 0;
};
static SkPath build_outset_triangle(const std::array<float, 3>* tri) {
SkPath outset;
for (int i = 0; i < 3; ++i) {
SkPoint p = {tri[i][0], tri[i][1]};
SkPoint left = {tri[(i + 2) % 3][0], tri[(i + 2) % 3][1]};
SkPoint right = {tri[(i + 1) % 3][0], tri[(i + 1) % 3][1]};
SkPoint n0, n1;
n0.setNormalize(left.y() - p.y(), p.x() - left.x());
n1.setNormalize(p.y() - right.y(), right.x() - p.x());
p += (n0 + n1) * 3;
if (0 == i) {
outset.moveTo(p);
} else {
outset.lineTo(p);
}
}
return outset;
}
DrawResult TessellationGM::onDraw(GrRecordingContext* ctx, GrRenderTargetContext* rtc,
SkCanvas* canvas, SkString* errorMsg) {
if (!ctx->priv().caps()->shaderCaps()->tessellationSupport()) {
*errorMsg = "Requires GPU tessellation support.";
return DrawResult::kSkip;
}
if (!ctx->priv().caps()->shaderCaps()->shaderDerivativeSupport()) {
*errorMsg = "Requires shader derivatives."
"(These are expected to always be present when there is tessellation!!)";
return DrawResult::kFail;
}
canvas->clear(SK_ColorBLACK);
SkPaint borderPaint;
borderPaint.setColor4f({0,1,1,1});
borderPaint.setAntiAlias(true);
canvas->drawPath(build_outset_triangle(kTri1), borderPaint);
canvas->drawPath(build_outset_triangle(kTri2), borderPaint);
borderPaint.setColor4f({1,0,1,1});
canvas->drawRect(kRect.makeOutset(1.5f, 1.5f), borderPaint);
GrOpMemoryPool* pool = ctx->priv().opMemoryPool();
rtc->priv().testingOnly_addDrawOp(
pool->allocate<TessellationTestOp>(canvas->getTotalMatrix(), kTri1));
rtc->priv().testingOnly_addDrawOp(
pool->allocate<TessellationTestOp>(canvas->getTotalMatrix(), kTri2));
rtc->priv().testingOnly_addDrawOp(
pool->allocate<TessellationTestOp>(canvas->getTotalMatrix(), nullptr));
return skiagm::DrawResult::kOk;
}
DEF_GM( return new TessellationGM(); )
}
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