AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
de6c531e46
skia2/gm/beziereffects.cpp
mtklein dbfd7ab108 Replace a lot of 'static const' with 'constexpr' or 'const'. 
'static const' means, there must be at most one of these, and initialize it at
compile time if possible or runtime if necessary.  This leads to unexpected
code execution, and TSAN* will complain about races on the guard variables.

Generally 'constexpr' or 'const' are better choices.  Neither can cause races:
they're either intialized at compile time (constexpr) or intialized each time
independently (const).

This CL prefers constexpr where possible, and uses const where not.  It even
prefers constexpr over const where they don't make a difference... I want to have
lots of examples of constexpr for people to see and mimic.

The scoped-to-class static has nothing to do with any of this, and is not changed.

* Not yet on the bots, which use an older TSAN.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2300623005

Review-Url: https://codereview.chromium.org/2300623005
2016-09-01 11:24:54 -07:00

557 lines
19 KiB
C++
Raw Blame History

/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm.h"
#if SK_SUPPORT_GPU
#include "GrDrawContextPriv.h"
#include "GrContext.h"
#include "GrPathUtils.h"
#include "GrTest.h"
#include "SkColorPriv.h"
#include "SkGeometry.h"
#include "batches/GrTestBatch.h"
#include "effects/GrBezierEffect.h"
static inline SkScalar eval_line(const SkPoint& p, const SkScalar lineEq[3], SkScalar sign) {
return sign * (lineEq[0] * p.fX + lineEq[1] * p.fY + lineEq[2]);
}
namespace skiagm {
class BezierCubicOrConicTestBatch : public GrTestBatch {
public:
DEFINE_BATCH_CLASS_ID
const char* name() const override { return "BezierCubicOrConicTestBatch"; }
BezierCubicOrConicTestBatch(sk_sp<GrGeometryProcessor> gp, const SkRect& bounds,
GrColor color, const SkScalar klmEqs[9], SkScalar sign)
: INHERITED(ClassID(), bounds, color)
, fGeometryProcessor(std::move(gp)) {
for (int i = 0; i < 9; i++) {
fKlmEqs[i] = klmEqs[i];
}
fSign = sign;
}
private:
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
void onPrepareDraws(Target* target) const override {
QuadHelper helper;
size_t vertexStride = fGeometryProcessor->getVertexStride();
SkASSERT(vertexStride == sizeof(Vertex));
Vertex* verts = reinterpret_cast<Vertex*>(helper.init(target, vertexStride, 1));
if (!verts) {
return;
}
const SkRect& bounds = this->bounds();
verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom,
sizeof(Vertex));
for (int v = 0; v < 4; ++v) {
verts[v].fKLM[0] = eval_line(verts[v].fPosition, fKlmEqs + 0, fSign);
verts[v].fKLM[1] = eval_line(verts[v].fPosition, fKlmEqs + 3, fSign);
verts[v].fKLM[2] = eval_line(verts[v].fPosition, fKlmEqs + 6, 1.f);
}
helper.recordDraw(target, fGeometryProcessor.get());
}
SkScalar fKlmEqs[9];
SkScalar fSign;
sk_sp<GrGeometryProcessor> fGeometryProcessor;
static constexpr int kVertsPerCubic = 4;
static constexpr int kIndicesPerCubic = 6;
typedef GrTestBatch INHERITED;
};
/**
* This GM directly exercises effects that draw Bezier curves in the GPU backend.
*/
class BezierCubicEffects : public GM {
public:
BezierCubicEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_cubic_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(SkCanvas* canvas) override {
GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
if (!drawContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
constexpr int kNumCubics = 15;
SkRandom rand;
// Mult by 3 for each edge effect type
int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumCubics*3)));
int numRows = SkScalarCeilToInt(SkIntToScalar(kNumCubics*3) / numCols);
SkScalar w = SkIntToScalar(drawContext->width()) / numCols;
SkScalar h = SkIntToScalar(drawContext->height()) / numRows;
int row = 0;
int col = 0;
constexpr GrColor color = 0xff000000;
for (int i = 0; i < kNumCubics; ++i) {
SkPoint baseControlPts[] = {
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
};
for(int edgeType = 0; edgeType < kGrProcessorEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrPrimitiveEdgeType et = (GrPrimitiveEdgeType)edgeType;
gp = GrCubicEffect::Make(color, SkMatrix::I(), et, *context->caps());
if (!gp) {
continue;
}
SkScalar x = SkScalarMul(col, w);
SkScalar y = SkScalarMul(row, h);
SkPoint controlPts[] = {
{x + baseControlPts[0].fX, y + baseControlPts[0].fY},
{x + baseControlPts[1].fX, y + baseControlPts[1].fY},
{x + baseControlPts[2].fX, y + baseControlPts[2].fY},
{x + baseControlPts[3].fX, y + baseControlPts[3].fY}
};
SkPoint chopped[10];
SkScalar klmEqs[9];
SkScalar klmSigns[3];
int cnt = GrPathUtils::chopCubicAtLoopIntersection(controlPts,
chopped,
klmEqs,
klmSigns);
SkPaint ctrlPtPaint;
ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
for (int i = 0; i < 4; ++i) {
canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrlPtPaint);
}
SkPaint polyPaint;
polyPaint.setColor(0xffA0A0A0);
polyPaint.setStrokeWidth(0);
polyPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, controlPts, polyPaint);
SkPaint choppedPtPaint;
choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
for (int c = 0; c < cnt; ++c) {
SkPoint* pts = chopped + 3 * c;
for (int i = 0; i < 4; ++i) {
canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtPaint);
}
SkRect bounds;
bounds.set(pts, 4);
SkPaint boundsPaint;
boundsPaint.setColor(0xff808080);
boundsPaint.setStrokeWidth(0);
boundsPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, boundsPaint);
GrPaint grPaint;
grPaint.setXPFactory(GrPorterDuffXPFactory::Make(SkXfermode::kSrc_Mode));
SkAutoTUnref<GrDrawBatch> batch(
new BezierCubicOrConicTestBatch(gp, bounds, color, klmEqs, klmSigns[c]));
drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch);
}
++col;
if (numCols == col) {
col = 0;
++row;
}
}
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
/**
* This GM directly exercises effects that draw Bezier curves in the GPU backend.
*/
class BezierConicEffects : public GM {
public:
BezierConicEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_conic_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(SkCanvas* canvas) override {
GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
if (!drawContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
constexpr int kNumConics = 10;
SkRandom rand;
// Mult by 3 for each edge effect type
int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumConics*3)));
int numRows = SkScalarCeilToInt(SkIntToScalar(kNumConics*3) / numCols);
SkScalar w = SkIntToScalar(drawContext->width()) / numCols;
SkScalar h = SkIntToScalar(drawContext->height()) / numRows;
int row = 0;
int col = 0;
constexpr GrColor color = 0xff000000;
for (int i = 0; i < kNumConics; ++i) {
SkPoint baseControlPts[] = {
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
};
SkScalar weight = rand.nextRangeF(0.f, 2.f);
for(int edgeType = 0; edgeType < kGrProcessorEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrPrimitiveEdgeType et = (GrPrimitiveEdgeType)edgeType;
gp = GrConicEffect::Make(color, SkMatrix::I(), et,
*context->caps(), SkMatrix::I(), false);
if (!gp) {
continue;
}
SkScalar x = SkScalarMul(col, w);
SkScalar y = SkScalarMul(row, h);
SkPoint controlPts[] = {
{x + baseControlPts[0].fX, y + baseControlPts[0].fY},
{x + baseControlPts[1].fX, y + baseControlPts[1].fY},
{x + baseControlPts[2].fX, y + baseControlPts[2].fY}
};
SkConic dst[4];
SkScalar klmEqs[9];
int cnt = chop_conic(controlPts, dst, weight);
GrPathUtils::getConicKLM(controlPts, weight, klmEqs);
SkPaint ctrlPtPaint;
ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrlPtPaint);
}
SkPaint polyPaint;
polyPaint.setColor(0xffA0A0A0);
polyPaint.setStrokeWidth(0);
polyPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint);
SkPaint choppedPtPaint;
choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
for (int c = 0; c < cnt; ++c) {
SkPoint* pts = dst[c].fPts;
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtPaint);
}
SkRect bounds;
//SkPoint bPts[] = {{0.f, 0.f}, {800.f, 800.f}};
//bounds.set(bPts, 2);
bounds.set(pts, 3);
SkPaint boundsPaint;
boundsPaint.setColor(0xff808080);
boundsPaint.setStrokeWidth(0);
boundsPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, boundsPaint);
GrPaint grPaint;
grPaint.setXPFactory(GrPorterDuffXPFactory::Make(SkXfermode::kSrc_Mode));
SkAutoTUnref<GrDrawBatch> batch(
new BezierCubicOrConicTestBatch(gp, bounds, color, klmEqs, 1.f));
drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch);
}
++col;
if (numCols == col) {
col = 0;
++row;
}
}
}
}
private:
// Uses the max curvature function for quads to estimate
// where to chop the conic. If the max curvature is not
// found along the curve segment it will return 1 and
// dst[0] is the original conic. If it returns 2 the dst[0]
// and dst[1] are the two new conics.
int split_conic(const SkPoint src[3], SkConic dst[2], const SkScalar weight) {
SkScalar t = SkFindQuadMaxCurvature(src);
if (t == 0) {
if (dst) {
dst[0].set(src, weight);
}
return 1;
} else {
if (dst) {
SkConic conic;
conic.set(src, weight);
conic.chopAt(t, dst);
}
return 2;
}
}
// Calls split_conic on the entire conic and then once more on each subsection.
// Most cases will result in either 1 conic (chop point is not within t range)
// or 3 points (split once and then one subsection is split again).
int chop_conic(const SkPoint src[3], SkConic dst[4], const SkScalar weight) {
SkConic dstTemp[2];
int conicCnt = split_conic(src, dstTemp, weight);
if (2 == conicCnt) {
int conicCnt2 = split_conic(dstTemp[0].fPts, dst, dstTemp[0].fW);
conicCnt = conicCnt2 + split_conic(dstTemp[1].fPts, &dst[conicCnt2], dstTemp[1].fW);
} else {
dst[0] = dstTemp[0];
}
return conicCnt;
}
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
class BezierQuadTestBatch : public GrTestBatch {
public:
DEFINE_BATCH_CLASS_ID
const char* name() const override { return "BezierQuadTestBatch"; }
BezierQuadTestBatch(sk_sp<GrGeometryProcessor> gp, const SkRect& bounds, GrColor color,
const GrPathUtils::QuadUVMatrix& devToUV)
: INHERITED(ClassID(), bounds, color)
, fDevToUV(devToUV)
, fGeometryProcessor(std::move(gp)) {
}
private:
struct Vertex {
SkPoint fPosition;
float fKLM[4]; // The last value is ignored. The effect expects a vec4f.
};
void onPrepareDraws(Target* target) const override {
QuadHelper helper;
size_t vertexStride = fGeometryProcessor->getVertexStride();
SkASSERT(vertexStride == sizeof(Vertex));
Vertex* verts = reinterpret_cast<Vertex*>(helper.init(target, vertexStride, 1));
if (!verts) {
return;
}
const SkRect& bounds = this->bounds();
verts[0].fPosition.setRectFan(bounds.fLeft, bounds.fTop, bounds.fRight, bounds.fBottom,
sizeof(Vertex));
fDevToUV.apply<4, sizeof(Vertex), sizeof(SkPoint)>(verts);
helper.recordDraw(target, fGeometryProcessor.get());
}
GrPathUtils::QuadUVMatrix fDevToUV;
sk_sp<GrGeometryProcessor> fGeometryProcessor;
static constexpr int kVertsPerCubic = 4;
static constexpr int kIndicesPerCubic = 6;
typedef GrTestBatch INHERITED;
};
/**
* This GM directly exercises effects that draw Bezier quad curves in the GPU backend.
*/
class BezierQuadEffects : public GM {
public:
BezierQuadEffects() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("bezier_quad_effects");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDraw(SkCanvas* canvas) override {
GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
if (!drawContext) {
skiagm::GM::DrawGpuOnlyMessage(canvas);
return;
}
GrContext* context = canvas->getGrContext();
if (!context) {
return;
}
struct Vertex {
SkPoint fPosition;
float fUV[4]; // The last two values are ignored. The effect expects a vec4f.
};
constexpr int kNumQuads = 5;
SkRandom rand;
int numCols = SkScalarCeilToInt(SkScalarSqrt(SkIntToScalar(kNumQuads*3)));
int numRows = SkScalarCeilToInt(SkIntToScalar(kNumQuads*3) / numCols);
SkScalar w = SkIntToScalar(drawContext->width()) / numCols;
SkScalar h = SkIntToScalar(drawContext->height()) / numRows;
int row = 0;
int col = 0;
constexpr GrColor color = 0xff000000;
for (int i = 0; i < kNumQuads; ++i) {
SkPoint baseControlPts[] = {
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)},
{rand.nextRangeF(0.f, w), rand.nextRangeF(0.f, h)}
};
for(int edgeType = 0; edgeType < kGrProcessorEdgeTypeCnt; ++edgeType) {
sk_sp<GrGeometryProcessor> gp;
GrPrimitiveEdgeType et = (GrPrimitiveEdgeType)edgeType;
gp = GrQuadEffect::Make(color, SkMatrix::I(), et,
*context->caps(), SkMatrix::I(), false);
if (!gp) {
continue;
}
SkScalar x = SkScalarMul(col, w);
SkScalar y = SkScalarMul(row, h);
SkPoint controlPts[] = {
{x + baseControlPts[0].fX, y + baseControlPts[0].fY},
{x + baseControlPts[1].fX, y + baseControlPts[1].fY},
{x + baseControlPts[2].fX, y + baseControlPts[2].fY}
};
SkPoint chopped[5];
int cnt = SkChopQuadAtMaxCurvature(controlPts, chopped);
SkPaint ctrlPtPaint;
ctrlPtPaint.setColor(rand.nextU() | 0xFF000000);
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(controlPts[i].fX, controlPts[i].fY, 6.f, ctrlPtPaint);
}
SkPaint polyPaint;
polyPaint.setColor(0xffA0A0A0);
polyPaint.setStrokeWidth(0);
polyPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 3, controlPts, polyPaint);
SkPaint choppedPtPaint;
choppedPtPaint.setColor(~ctrlPtPaint.getColor() | 0xFF000000);
for (int c = 0; c < cnt; ++c) {
SkPoint* pts = chopped + 2 * c;
for (int i = 0; i < 3; ++i) {
canvas->drawCircle(pts[i].fX, pts[i].fY, 3.f, choppedPtPaint);
}
SkRect bounds;
bounds.set(pts, 3);
SkPaint boundsPaint;
boundsPaint.setColor(0xff808080);
boundsPaint.setStrokeWidth(0);
boundsPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(bounds, boundsPaint);
GrPaint grPaint;
grPaint.setXPFactory(GrPorterDuffXPFactory::Make(SkXfermode::kSrc_Mode));
GrPathUtils::QuadUVMatrix DevToUV(pts);
SkAutoTUnref<GrDrawBatch> batch(
new BezierQuadTestBatch(gp, bounds, color, DevToUV));
drawContext->drawContextPriv().testingOnly_drawBatch(grPaint, batch);
}
++col;
if (numCols == col) {
col = 0;
++row;
}
}
}
}
private:
typedef GM INHERITED;
};
DEF_GM(return new BezierCubicEffects;)
DEF_GM(return new BezierConicEffects;)
DEF_GM(return new BezierQuadEffects;)
}
#endif
Reference in New Issue View Git Blame Copy Permalink