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- /*
- * Copyright 2012 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 "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImageFilter.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint3.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/effects/SkLightingImageFilter.h"
- #include "include/effects/SkOffsetImageFilter.h"
- #include "tools/ToolUtils.h"
- #include "tools/timer/TimeUtils.h"
- #define WIDTH 330
- #define HEIGHT 660
- namespace skiagm {
- class ImageLightingGM : public GM {
- public:
- ImageLightingGM()
- : fAzimuth(SkIntToScalar(kStartAzimuth)) {
- this->setBGColor(0xFF000000);
- }
- protected:
- SkString onShortName() override {
- return SkString("lighting");
- }
- SkISize onISize() override {
- return SkISize::Make(WIDTH, HEIGHT);
- }
- void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
- canvas->save();
- canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
- canvas->clipRect(SkRect::MakeWH(
- SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
- canvas->drawBitmap(fBitmap, 0, 0, &paint);
- canvas->restore();
- }
- void onOnceBeforeDraw() override {
- fBitmap = ToolUtils::create_string_bitmap(100, 100, 0xFFFFFFFF, 20, 70, 96, "e");
- }
- void onDraw(SkCanvas* canvas) override {
- canvas->clear(0xFF101010);
- SkPaint checkPaint;
- checkPaint.setColor(0xFF202020);
- for (int y = 0; y < HEIGHT; y += 16) {
- for (int x = 0; x < WIDTH; x += 16) {
- canvas->save();
- canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
- canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint);
- canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint);
- canvas->restore();
- }
- }
- SkScalar sinAzimuth = SkScalarSin(SkDegreesToRadians(fAzimuth)),
- cosAzimuth = SkScalarCos(SkDegreesToRadians(fAzimuth));
- SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
- SkPoint3 spotLocation = SkPoint3::Make(spotTarget.fX + 70.7214f * cosAzimuth,
- spotTarget.fY + 70.7214f * sinAzimuth,
- spotTarget.fZ + SkIntToScalar(20));
- SkScalar spotExponent = SK_Scalar1;
- SkPoint3 pointLocation = SkPoint3::Make(spotTarget.fX + 50 * cosAzimuth,
- spotTarget.fY + 50 * sinAzimuth,
- SkIntToScalar(10));
- SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
- SkPoint3 distantDirection = SkPoint3::Make(cosAzimuth * SkScalarCos(elevationRad),
- sinAzimuth * SkScalarCos(elevationRad),
- SkScalarSin(elevationRad));
- SkScalar cutoffAngle = SkIntToScalar(15);
- SkScalar kd = SkIntToScalar(2);
- SkScalar ks = SkIntToScalar(1);
- SkScalar shininess = SkIntToScalar(8);
- SkScalar surfaceScale = SkIntToScalar(1);
- SkColor white(0xFFFFFFFF);
- SkPaint paint;
- SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 10, 60, 65));
- SkImageFilter::CropRect fullSizeCropRect(SkRect::MakeXYWH(0, 0, 100, 100));
- sk_sp<SkImageFilter> noopCropped(SkOffsetImageFilter::Make(0, 0, nullptr, &cropRect));
- int y = 0;
- for (int i = 0; i < 3; i++) {
- const SkImageFilter::CropRect* cr = (i == 1) ? &cropRect : (i == 2) ? &fullSizeCropRect : nullptr;
- sk_sp<SkImageFilter> input = (i == 2) ? noopCropped : nullptr;
- paint.setImageFilter(SkLightingImageFilter::MakePointLitDiffuse(pointLocation,
- white,
- surfaceScale,
- kd,
- input,
- cr));
- drawClippedBitmap(canvas, paint, 0, y);
- paint.setImageFilter(SkLightingImageFilter::MakeDistantLitDiffuse(distantDirection,
- white,
- surfaceScale,
- kd,
- input,
- cr));
- drawClippedBitmap(canvas, paint, 110, y);
- paint.setImageFilter(SkLightingImageFilter::MakeSpotLitDiffuse(spotLocation,
- spotTarget,
- spotExponent,
- cutoffAngle,
- white,
- surfaceScale,
- kd,
- input,
- cr));
- drawClippedBitmap(canvas, paint, 220, y);
- y += 110;
- paint.setImageFilter(SkLightingImageFilter::MakePointLitSpecular(pointLocation,
- white,
- surfaceScale,
- ks,
- shininess,
- input,
- cr));
- drawClippedBitmap(canvas, paint, 0, y);
- paint.setImageFilter(SkLightingImageFilter::MakeDistantLitSpecular(distantDirection,
- white,
- surfaceScale,
- ks,
- shininess,
- input,
- cr));
- drawClippedBitmap(canvas, paint, 110, y);
- paint.setImageFilter(SkLightingImageFilter::MakeSpotLitSpecular(spotLocation,
- spotTarget,
- spotExponent,
- cutoffAngle,
- white,
- surfaceScale,
- ks,
- shininess,
- input,
- cr));
- drawClippedBitmap(canvas, paint, 220, y);
- y += 110;
- }
- }
- bool onAnimate(double nanos) override {
- constexpr SkScalar kDesiredDurationSecs = 15.0f;
- fAzimuth = kStartAzimuth + TimeUtils::Scaled(1e-9 * nanos, 360.0f/kDesiredDurationSecs, 360.0f);
- return true;
- }
- private:
- static constexpr int kStartAzimuth = 225;
- SkBitmap fBitmap;
- SkScalar fAzimuth;
- typedef GM INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_GM(return new ImageLightingGM;)
- }
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