ec895345e5
Due to the code at the end of emitCode this shader was darker than the SkGaussianEdgeShader on Android. This CL also removes the unused "pad" parameter. GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2344963002 NOTREECHECKS=true TBR=bsalomon@google.com Review-Url: https://codereview.chromium.org/2344963002
438 lines
12 KiB
C++
438 lines
12 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkAnimTimer.h"
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#include "SkBlurMaskFilter.h"
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#include "SkGaussianEdgeShader.h"
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#include "SkRRectsGaussianEdgeShader.h"
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#include "SkPath.h"
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#include "SkPathOps.h"
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#include "SkRRect.h"
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#include "SkStroke.h"
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constexpr int kNumCols = 2;
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constexpr int kNumRows = 5;
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constexpr int kCellSize = 128;
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constexpr SkScalar kPad = 8.0f;
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constexpr SkScalar kBlurRadius = 8.0f;
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constexpr SkScalar kPeriod = 8.0f;
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constexpr int kClipOffset = 32;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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class Object {
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public:
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virtual ~Object() {}
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virtual bool asRRect(SkRRect* rr) const = 0;
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virtual SkPath asPath(SkScalar inset) const = 0;
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virtual void draw(SkCanvas* canvas, const SkPaint& paint) const = 0;
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virtual void clip(SkCanvas* canvas) const = 0;
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virtual bool contains(const SkRect& r) const = 0;
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virtual const SkRect& bounds() const = 0;
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};
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typedef Object* (*PFMakeMthd)(const SkRect& r);
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class RRect : public Object {
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public:
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RRect(const SkRect& r) {
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fRRect = SkRRect::MakeRectXY(r, 4*kPad, 4*kPad);
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}
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bool asRRect(SkRRect* rr) const override {
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*rr = fRRect;
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return true;
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}
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SkPath asPath(SkScalar inset) const override {
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SkRRect tmp = fRRect;
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tmp.inset(inset, inset);
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SkPath p;
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p.addRRect(tmp);
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return p;
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}
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void draw(SkCanvas* canvas, const SkPaint& paint) const override {
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canvas->drawRRect(fRRect, paint);
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}
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void clip(SkCanvas* canvas) const override {
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canvas->clipRRect(fRRect);
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}
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bool contains(const SkRect& r) const override {
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return fRRect.contains(r);
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}
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const SkRect& bounds() const override {
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return fRRect.getBounds();
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}
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static Object* Make(const SkRect& r) {
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return new RRect(r);
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}
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private:
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SkRRect fRRect;
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};
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class StrokedRRect : public Object {
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public:
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StrokedRRect(const SkRect& r) {
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fRRect = SkRRect::MakeRectXY(r, 2*kPad, 2*kPad);
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fStrokedBounds = r.makeOutset(kPad, kPad);
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}
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bool asRRect(SkRRect* rr) const override {
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return false;
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}
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SkPath asPath(SkScalar inset) const override {
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SkRRect tmp = fRRect;
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tmp.inset(inset, inset);
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// In this case we want the outline of the stroked rrect
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(kPad);
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SkPath p, stroked;
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p.addRRect(tmp);
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SkStroke stroke(paint);
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stroke.strokePath(p, &stroked);
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return stroked;
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}
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void draw(SkCanvas* canvas, const SkPaint& paint) const override {
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SkPaint stroke(paint);
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stroke.setStyle(SkPaint::kStroke_Style);
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stroke.setStrokeWidth(kPad);
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canvas->drawRRect(fRRect, stroke);
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}
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void clip(SkCanvas* canvas) const override {
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canvas->clipPath(this->asPath(0.0f));
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}
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bool contains(const SkRect& r) const override {
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return false;
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}
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const SkRect& bounds() const override {
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return fStrokedBounds;
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}
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static Object* Make(const SkRect& r) {
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return new StrokedRRect(r);
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}
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private:
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SkRRect fRRect;
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SkRect fStrokedBounds;
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};
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class Oval : public Object {
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public:
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Oval(const SkRect& r) {
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fRRect = SkRRect::MakeOval(r);
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}
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bool asRRect(SkRRect* rr) const override {
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*rr = fRRect;
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return true;
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}
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SkPath asPath(SkScalar inset) const override {
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SkRRect tmp = fRRect;
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tmp.inset(inset, inset);
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SkPath p;
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p.addRRect(tmp);
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return p;
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}
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void draw(SkCanvas* canvas, const SkPaint& paint) const override {
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canvas->drawRRect(fRRect, paint);
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}
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void clip(SkCanvas* canvas) const override {
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canvas->clipRRect(fRRect);
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}
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bool contains(const SkRect& r) const override {
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return fRRect.contains(r);
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}
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const SkRect& bounds() const override {
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return fRRect.getBounds();
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}
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static Object* Make(const SkRect& r) {
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return new Oval(r);
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}
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private:
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SkRRect fRRect;
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};
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class Rect : public Object {
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public:
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Rect(const SkRect& r) : fRect(r) { }
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bool asRRect(SkRRect* rr) const override {
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*rr = SkRRect::MakeRect(fRect);
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return true;
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}
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SkPath asPath(SkScalar inset) const override {
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SkRect tmp = fRect;
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tmp.inset(inset, inset);
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SkPath p;
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p.addRect(tmp);
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return p;
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}
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void draw(SkCanvas* canvas, const SkPaint& paint) const override {
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canvas->drawRect(fRect, paint);
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}
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void clip(SkCanvas* canvas) const override {
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canvas->clipRect(fRect);
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}
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bool contains(const SkRect& r) const override {
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return fRect.contains(r);
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}
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const SkRect& bounds() const override {
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return fRect;
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}
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static Object* Make(const SkRect& r) {
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return new Rect(r);
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}
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private:
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SkRect fRect;
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};
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class Pentagon : public Object {
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public:
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Pentagon(const SkRect& r) {
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SkPoint points[5] = {
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{ 0.000000f, -1.000000f },
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{ -0.951056f, -0.309017f },
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{ -0.587785f, 0.809017f },
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{ 0.587785f, 0.809017f },
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{ 0.951057f, -0.309017f },
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};
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SkScalar height = r.height()/2.0f;
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SkScalar width = r.width()/2.0f;
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fPath.moveTo(r.centerX() + points[0].fX * width, r.centerY() + points[0].fY * height);
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fPath.lineTo(r.centerX() + points[1].fX * width, r.centerY() + points[1].fY * height);
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fPath.lineTo(r.centerX() + points[2].fX * width, r.centerY() + points[2].fY * height);
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fPath.lineTo(r.centerX() + points[3].fX * width, r.centerY() + points[3].fY * height);
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fPath.lineTo(r.centerX() + points[4].fX * width, r.centerY() + points[4].fY * height);
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fPath.close();
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}
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bool asRRect(SkRRect* rr) const override {
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return false;
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}
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SkPath asPath(SkScalar inset) const override { return fPath; }
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void draw(SkCanvas* canvas, const SkPaint& paint) const override {
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canvas->drawPath(fPath, paint);
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}
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void clip(SkCanvas* canvas) const override {
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canvas->clipPath(this->asPath(0.0f));
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}
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bool contains(const SkRect& r) const override {
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return false;
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}
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const SkRect& bounds() const override {
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return fPath.getBounds();
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}
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static Object* Make(const SkRect& r) {
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return new Pentagon(r);
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}
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private:
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SkPath fPath;
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};
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///////////////////////////////////////////////////////////////////////////////////////////////////
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namespace skiagm {
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// This GM attempts to mimic Android's reveal animation
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class RevealGM : public GM {
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public:
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enum Mode {
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kGaussianEdge_Mode,
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kBlurMask_Mode,
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kRRectsGaussianEdge_Mode,
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kLast_Mode = kRRectsGaussianEdge_Mode
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};
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static const int kModeCount = kLast_Mode + 1;
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RevealGM() : fFraction(0.5f), fMode(kRRectsGaussianEdge_Mode), fPause(false) {
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this->setBGColor(sk_tool_utils::color_to_565(0xFFCCCCCC));
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}
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protected:
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SkString onShortName() override {
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return SkString("reveal");
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}
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SkISize onISize() override {
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return SkISize::Make(kNumCols * kCellSize, kNumRows * kCellSize);
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}
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void onDraw(SkCanvas* canvas) override {
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PFMakeMthd clipMakes[kNumCols] = { Oval::Make, Rect::Make };
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PFMakeMthd drawMakes[kNumRows] = {
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RRect::Make, StrokedRRect::Make, Oval::Make, Rect::Make, Pentagon::Make
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};
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SkPaint strokePaint;
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strokePaint.setColor(SK_ColorGREEN);
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strokePaint.setStyle(SkPaint::kStroke_Style);
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strokePaint.setStrokeWidth(0.0f);
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for (int y = 0; y < kNumRows; ++y) {
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for (int x = 0; x < kNumCols; ++x) {
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SkRect cell = SkRect::MakeXYWH(SkIntToScalar(x*kCellSize),
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SkIntToScalar(y*kCellSize),
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SkIntToScalar(kCellSize),
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SkIntToScalar(kCellSize));
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canvas->save();
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canvas->clipRect(cell);
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cell.inset(kPad, kPad);
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SkPoint clipCenter = SkPoint::Make(cell.centerX() - kClipOffset,
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cell.centerY() + kClipOffset);
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SkScalar curSize = kCellSize * fFraction;
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const SkRect clipRect = SkRect::MakeLTRB(clipCenter.fX - curSize,
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clipCenter.fY - curSize,
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clipCenter.fX + curSize,
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clipCenter.fY + curSize);
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SkAutoTDelete<Object> clipObj((*clipMakes[x])(clipRect));
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SkAutoTDelete<Object> drawObj((*drawMakes[y])(cell));
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// The goal is to replace this clipped draw (which clips the
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// shadow) with a draw using the geometric clip
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if (kGaussianEdge_Mode == fMode) {
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canvas->save();
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clipObj->clip(canvas);
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// Draw with GaussianEdgeShader
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SkPaint paint;
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paint.setAntiAlias(true);
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// G channel is an F6.2 radius
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paint.setColor(SkColorSetARGB(255, 0, (unsigned char)(4*kBlurRadius), 0));
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paint.setShader(SkGaussianEdgeShader::Make());
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drawObj->draw(canvas, paint);
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canvas->restore();
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} else if (kBlurMask_Mode == fMode) {
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SkPath clippedPath;
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SkScalar sigma = kBlurRadius / 4.0f;
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if (clipObj->contains(drawObj->bounds())) {
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clippedPath = drawObj->asPath(2.0f*sigma);
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} else {
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SkPath drawnPath = drawObj->asPath(2.0f*sigma);
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SkPath clipPath = clipObj->asPath(2.0f*sigma);
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SkAssertResult(Op(clipPath, drawnPath, kIntersect_SkPathOp, &clippedPath));
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}
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SkPaint blurPaint;
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blurPaint.setAntiAlias(true);
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blurPaint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle, sigma));
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canvas->drawPath(clippedPath, blurPaint);
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} else {
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SkASSERT(kRRectsGaussianEdge_Mode == fMode);
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SkRect cover = drawObj->bounds();
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SkAssertResult(cover.intersect(clipObj->bounds()));
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SkPaint paint;
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SkRRect clipRR, drawnRR;
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if (clipObj->asRRect(&clipRR) && drawObj->asRRect(&drawnRR)) {
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paint.setShader(SkRRectsGaussianEdgeShader::Make(clipRR, drawnRR,
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kBlurRadius));
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}
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canvas->drawRect(cover, paint);
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}
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// Draw the clip and draw objects for reference
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SkPaint strokePaint;
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strokePaint.setStyle(SkPaint::kStroke_Style);
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strokePaint.setStrokeWidth(0);
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strokePaint.setColor(SK_ColorRED);
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canvas->drawPath(drawObj->asPath(0.0f), strokePaint);
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strokePaint.setColor(SK_ColorGREEN);
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canvas->drawPath(clipObj->asPath(0.0f), strokePaint);
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canvas->restore();
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}
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}
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}
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bool onHandleKey(SkUnichar uni) override {
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switch (uni) {
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case 'C':
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fMode = (Mode)((fMode + 1) % kModeCount);
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return true;
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case 'p':
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fPause = !fPause;
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return true;
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}
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return false;
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}
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bool onAnimate(const SkAnimTimer& timer) override {
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if (!fPause) {
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fFraction = timer.pingPong(kPeriod, 0.0f, 0.0f, 1.0f);
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}
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return true;
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}
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private:
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SkScalar fFraction;
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Mode fMode;
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bool fPause;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new RevealGM;)
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}
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