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skia2/bench/MatrixBench.cpp
John Stiles a444743005 Remove SK_MAYBE_UNUSED. 
[[maybe_unused]] is built in to C++17.

Change-Id: I5e49d0801878fd9fbca62ab28080aa856e33ca79
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/550500
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2022-06-16 16:52:53 +00:00

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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "bench/Benchmark.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkString.h"
#include "include/utils/SkRandom.h"
#include "src/core/SkMatrixUtils.h"
class MatrixBench : public Benchmark {
SkString fName;
public:
MatrixBench(const char name[]) {
fName.printf("matrix_%s", name);
}
bool isSuitableFor(Backend backend) override {
return backend == kNonRendering_Backend;
}
virtual void performTest() = 0;
protected:
virtual int mulLoopCount() const { return 1; }
const char* onGetName() override {
return fName.c_str();
}
void onDraw(int loops, SkCanvas*) override {
for (int i = 0; i < loops; i++) {
this->performTest();
}
}
private:
using INHERITED = Benchmark;
};
class EqualsMatrixBench : public MatrixBench {
public:
EqualsMatrixBench() : INHERITED("equals") {}
protected:
void performTest() override {
SkMatrix m0, m1, m2;
m0.reset();
m1.reset();
m2.reset();
// xor into a volatile prevents these comparisons from being optimized away.
[[maybe_unused]] volatile bool junk = false;
junk ^= (m0 == m1);
junk ^= (m1 == m2);
junk ^= (m2 == m0);
}
private:
using INHERITED = MatrixBench;
};
class ScaleMatrixBench : public MatrixBench {
public:
ScaleMatrixBench() : INHERITED("scale") {
fSX = fSY = 1.5f;
fM0.reset();
fM1.setScale(fSX, fSY);
fM2.setTranslate(fSX, fSY);
}
protected:
void performTest() override {
SkMatrix m;
m = fM0; m.preScale(fSX, fSY);
m = fM1; m.preScale(fSX, fSY);
m = fM2; m.preScale(fSX, fSY);
}
private:
SkMatrix fM0, fM1, fM2;
SkScalar fSX, fSY;
using INHERITED = MatrixBench;
};
// having unknown values in our arrays can throw off the timing a lot, perhaps
// handling NaN values is a lot slower. Anyway, this is just meant to put
// reasonable values in our arrays.
template <typename T> void init9(T array[9]) {
SkRandom rand;
for (int i = 0; i < 9; i++) {
array[i] = rand.nextSScalar1();
}
}
class GetTypeMatrixBench : public MatrixBench {
public:
GetTypeMatrixBench()
: INHERITED("gettype") {
fArray[0] = (float) fRnd.nextS();
fArray[1] = (float) fRnd.nextS();
fArray[2] = (float) fRnd.nextS();
fArray[3] = (float) fRnd.nextS();
fArray[4] = (float) fRnd.nextS();
fArray[5] = (float) fRnd.nextS();
fArray[6] = (float) fRnd.nextS();
fArray[7] = (float) fRnd.nextS();
fArray[8] = (float) fRnd.nextS();
}
protected:
// Putting random generation of the matrix inside performTest()
// would help us avoid anomalous runs, but takes up 25% or
// more of the function time.
void performTest() override {
fMatrix.setAll(fArray[0], fArray[1], fArray[2],
fArray[3], fArray[4], fArray[5],
fArray[6], fArray[7], fArray[8]);
// xoring into a volatile prevents the compiler from optimizing these away
[[maybe_unused]] volatile int junk = 0;
junk ^= (fMatrix.getType());
fMatrix.dirtyMatrixTypeCache();
junk ^= (fMatrix.getType());
fMatrix.dirtyMatrixTypeCache();
junk ^= (fMatrix.getType());
fMatrix.dirtyMatrixTypeCache();
junk ^= (fMatrix.getType());
fMatrix.dirtyMatrixTypeCache();
junk ^= (fMatrix.getType());
fMatrix.dirtyMatrixTypeCache();
junk ^= (fMatrix.getType());
fMatrix.dirtyMatrixTypeCache();
junk ^= (fMatrix.getType());
fMatrix.dirtyMatrixTypeCache();
junk ^= (fMatrix.getType());
}
private:
SkMatrix fMatrix;
float fArray[9];
SkRandom fRnd;
using INHERITED = MatrixBench;
};
class DecomposeMatrixBench : public MatrixBench {
public:
DecomposeMatrixBench() : INHERITED("decompose") {}
protected:
void onDelayedSetup() override {
for (int i = 0; i < 10; ++i) {
SkScalar rot0 = (fRandom.nextBool()) ? fRandom.nextRangeF(-180, 180) : 0.0f;
SkScalar sx = fRandom.nextRangeF(-3000.f, 3000.f);
SkScalar sy = (fRandom.nextBool()) ? fRandom.nextRangeF(-3000.f, 3000.f) : sx;
SkScalar rot1 = fRandom.nextRangeF(-180, 180);
fMatrix[i].setRotate(rot0);
fMatrix[i].postScale(sx, sy);
fMatrix[i].postRotate(rot1);
}
}
void performTest() override {
SkPoint rotation1, scale, rotation2;
for (int i = 0; i < 10; ++i) {
(void) SkDecomposeUpper2x2(fMatrix[i], &rotation1, &scale, &rotation2);
}
}
private:
SkMatrix fMatrix[10];
SkRandom fRandom;
using INHERITED = MatrixBench;
};
class InvertMapRectMatrixBench : public MatrixBench {
public:
InvertMapRectMatrixBench(const char* name, int flags)
: INHERITED(name)
, fFlags(flags) {
fMatrix.reset();
fIteration = 0;
if (flags & kScale_Flag) {
fMatrix.postScale(1.5f, 2.5f);
}
if (flags & kTranslate_Flag) {
fMatrix.postTranslate(1.5f, 2.5f);
}
if (flags & kRotate_Flag) {
fMatrix.postRotate(45.0f);
}
if (flags & kPerspective_Flag) {
fMatrix.setPerspX(1.5f);
fMatrix.setPerspY(2.5f);
}
if (0 == (flags & kUncachedTypeMask_Flag)) {
fMatrix.getType();
}
}
enum Flag {
kScale_Flag = 0x01,
kTranslate_Flag = 0x02,
kRotate_Flag = 0x04,
kPerspective_Flag = 0x08,
kUncachedTypeMask_Flag = 0x10,
};
protected:
void performTest() override {
if (fFlags & kUncachedTypeMask_Flag) {
// This will invalidate the typemask without
// changing the matrix.
fMatrix.setPerspX(fMatrix.getPerspX());
}
SkMatrix inv;
bool invertible = fMatrix.invert(&inv);
SkASSERT(invertible);
SkRect transformedRect;
// an arbitrary, small, non-zero rect to transform
SkRect srcRect = SkRect::MakeWH(SkIntToScalar(10), SkIntToScalar(10));
if (invertible) {
inv.mapRect(&transformedRect, srcRect);
}
}
private:
SkMatrix fMatrix;
int fFlags;
unsigned fIteration;
using INHERITED = MatrixBench;
};
///////////////////////////////////////////////////////////////////////////////
DEF_BENCH( return new EqualsMatrixBench(); )
DEF_BENCH( return new ScaleMatrixBench(); )
DEF_BENCH( return new GetTypeMatrixBench(); )
DEF_BENCH( return new DecomposeMatrixBench(); )
DEF_BENCH( return new InvertMapRectMatrixBench("invert_maprect_identity", 0); )
DEF_BENCH(return new InvertMapRectMatrixBench(
"invert_maprect_rectstaysrect",
InvertMapRectMatrixBench::kScale_Flag |
InvertMapRectMatrixBench::kTranslate_Flag); )
DEF_BENCH(return new InvertMapRectMatrixBench(
"invert_maprect_translate",
InvertMapRectMatrixBench::kTranslate_Flag); )
DEF_BENCH(return new InvertMapRectMatrixBench(
"invert_maprect_nonpersp",
InvertMapRectMatrixBench::kScale_Flag |
InvertMapRectMatrixBench::kRotate_Flag |
InvertMapRectMatrixBench::kTranslate_Flag); )
DEF_BENCH( return new InvertMapRectMatrixBench(
"invert_maprect_persp",
InvertMapRectMatrixBench::kPerspective_Flag); )
DEF_BENCH( return new InvertMapRectMatrixBench(
"invert_maprect_typemask_rectstaysrect",
InvertMapRectMatrixBench::kUncachedTypeMask_Flag |
InvertMapRectMatrixBench::kScale_Flag |
InvertMapRectMatrixBench::kTranslate_Flag); )
DEF_BENCH( return new InvertMapRectMatrixBench(
"invert_maprect_typemask_nonpersp",
InvertMapRectMatrixBench::kUncachedTypeMask_Flag |
InvertMapRectMatrixBench::kScale_Flag |
InvertMapRectMatrixBench::kRotate_Flag |
InvertMapRectMatrixBench::kTranslate_Flag); )
///////////////////////////////////////////////////////////////////////////////
static SkMatrix make_trans() { return SkMatrix::Translate(2, 3); }
static SkMatrix make_scale() { SkMatrix m(make_trans()); m.postScale(1.5f, 0.5f); return m; }
static SkMatrix make_afine() { SkMatrix m(make_trans()); m.postRotate(15); return m; }
class MapPointsMatrixBench : public MatrixBench {
protected:
SkMatrix fM;
enum {
N = 32
};
SkPoint fSrc[N], fDst[N];
public:
MapPointsMatrixBench(const char name[], const SkMatrix& m)
: MatrixBench(name), fM(m)
{
SkRandom rand;
for (int i = 0; i < N; ++i) {
fSrc[i].set(rand.nextSScalar1(), rand.nextSScalar1());
}
}
void performTest() override {
for (int i = 0; i < 1000000; ++i) {
fM.mapPoints(fDst, fSrc, N);
}
}
};
DEF_BENCH( return new MapPointsMatrixBench("mappoints_identity", SkMatrix::I()); )
DEF_BENCH( return new MapPointsMatrixBench("mappoints_trans", make_trans()); )
DEF_BENCH( return new MapPointsMatrixBench("mappoints_scale", make_scale()); )
DEF_BENCH( return new MapPointsMatrixBench("mappoints_affine", make_afine()); )
///////////////////////////////////////////////////////////////////////////////
class MapRectMatrixBench : public MatrixBench {
SkMatrix fM;
SkRect fR;
bool fScaleTrans;
enum { MEGA_LOOP = 1000 * 1000 };
public:
MapRectMatrixBench(const char name[], bool scale_trans)
: MatrixBench(name), fScaleTrans(scale_trans)
{
fM.setScale(2, 3);
fM.postTranslate(1, 2);
fR.setLTRB(10, 10, 100, 200);
}
void performTest() override {
SkRect dst;
if (fScaleTrans) {
for (int i = 0; i < MEGA_LOOP; ++i) {
fM.mapRectScaleTranslate(&dst, fR);
}
} else {
for (int i = 0; i < MEGA_LOOP; ++i) {
fM.mapRect(&dst, fR);
}
}
}
};
DEF_BENCH( return new MapRectMatrixBench("maprect", false); )
DEF_BENCH( return new MapRectMatrixBench("maprectscaletrans", true); )
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