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179 lines
8.2 KiB
179 lines
8.2 KiB
/*
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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 "sk_tool_utils.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(0xFF101010);
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SkPaint checkPaint;
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checkPaint.setColor(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(cosAzimuth * SkScalarCos(elevationRad),
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sinAzimuth * 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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