dbfd7ab108
'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
180 lines
8.3 KiB
C++
180 lines
8.3 KiB
C++
/*
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* Copyright 2012 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 "SkLightingImageFilter.h"
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#include "SkOffsetImageFilter.h"
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#include "SkPoint3.h"
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#define WIDTH 330
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#define HEIGHT 660
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namespace skiagm {
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class ImageLightingGM : public GM {
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public:
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ImageLightingGM()
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: fAzimuth(SkIntToScalar(kStartAzimuth)) {
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this->setBGColor(0xFF000000);
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}
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protected:
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SkString onShortName() override {
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return SkString("lighting");
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}
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SkISize onISize() override {
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return SkISize::Make(WIDTH, HEIGHT);
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}
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void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas->clipRect(SkRect::MakeWH(
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SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
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canvas->drawBitmap(fBitmap, 0, 0, &paint);
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canvas->restore();
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}
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void onOnceBeforeDraw() override {
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fBitmap = sk_tool_utils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->clear(sk_tool_utils::color_to_565(0xFF101010));
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SkPaint checkPaint;
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checkPaint.setColor(sk_tool_utils::color_to_565(0xFF202020));
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for (int y = 0; y < HEIGHT; y += 16) {
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for (int x = 0; x < WIDTH; x += 16) {
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint);
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canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint);
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canvas->restore();
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}
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}
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SkScalar cosAzimuth;
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SkScalar sinAzimuth = SkScalarSinCos(SkDegreesToRadians(fAzimuth), &cosAzimuth);
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SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
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SkPoint3 spotLocation = SkPoint3::Make(spotTarget.fX + 70.7214f * cosAzimuth,
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spotTarget.fY + 70.7214f * sinAzimuth,
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spotTarget.fZ + SkIntToScalar(20));
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SkScalar spotExponent = SK_Scalar1;
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SkPoint3 pointLocation = SkPoint3::Make(spotTarget.fX + 50 * cosAzimuth,
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spotTarget.fY + 50 * sinAzimuth,
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SkIntToScalar(10));
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SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
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SkPoint3 distantDirection = SkPoint3::Make(SkScalarMul(cosAzimuth,
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SkScalarCos(elevationRad)),
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SkScalarMul(sinAzimuth,
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SkScalarCos(elevationRad)),
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SkScalarSin(elevationRad));
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SkScalar cutoffAngle = SkIntToScalar(15);
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SkScalar kd = SkIntToScalar(2);
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SkScalar ks = SkIntToScalar(1);
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SkScalar shininess = SkIntToScalar(8);
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SkScalar surfaceScale = SkIntToScalar(1);
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SkColor white(0xFFFFFFFF);
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SkPaint paint;
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SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 10, 60, 65));
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SkImageFilter::CropRect fullSizeCropRect(SkRect::MakeXYWH(0, 0, 100, 100));
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sk_sp<SkImageFilter> noopCropped(SkOffsetImageFilter::Make(0, 0, nullptr, &cropRect));
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int y = 0;
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for (int i = 0; i < 3; i++) {
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const SkImageFilter::CropRect* cr = (i == 1) ? &cropRect : (i == 2) ? &fullSizeCropRect : nullptr;
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sk_sp<SkImageFilter> input = (i == 2) ? noopCropped : nullptr;
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paint.setImageFilter(SkLightingImageFilter::MakePointLitDiffuse(pointLocation,
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white,
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surfaceScale,
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kd,
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input,
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cr));
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drawClippedBitmap(canvas, paint, 0, y);
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paint.setImageFilter(SkLightingImageFilter::MakeDistantLitDiffuse(distantDirection,
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white,
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surfaceScale,
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kd,
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input,
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cr));
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drawClippedBitmap(canvas, paint, 110, y);
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paint.setImageFilter(SkLightingImageFilter::MakeSpotLitDiffuse(spotLocation,
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spotTarget,
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spotExponent,
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cutoffAngle,
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white,
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surfaceScale,
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kd,
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input,
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cr));
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drawClippedBitmap(canvas, paint, 220, y);
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y += 110;
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paint.setImageFilter(SkLightingImageFilter::MakePointLitSpecular(pointLocation,
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white,
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surfaceScale,
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ks,
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shininess,
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input,
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cr));
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drawClippedBitmap(canvas, paint, 0, y);
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paint.setImageFilter(SkLightingImageFilter::MakeDistantLitSpecular(distantDirection,
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white,
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surfaceScale,
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ks,
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shininess,
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input,
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cr));
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drawClippedBitmap(canvas, paint, 110, y);
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paint.setImageFilter(SkLightingImageFilter::MakeSpotLitSpecular(spotLocation,
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spotTarget,
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spotExponent,
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cutoffAngle,
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white,
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surfaceScale,
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ks,
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shininess,
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input,
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cr));
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drawClippedBitmap(canvas, paint, 220, y);
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y += 110;
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}
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}
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bool onAnimate(const SkAnimTimer& timer) override {
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constexpr SkScalar kDesiredDurationSecs = 15.0f;
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fAzimuth = kStartAzimuth + timer.scaled(360.0f/kDesiredDurationSecs, 360.0f);
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return true;
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}
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private:
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static constexpr int kStartAzimuth = 225;
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SkBitmap fBitmap;
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SkScalar fAzimuth;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new ImageLightingGM;)
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}
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