| /* |
| * 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/SkImageFilters.h" |
| #include "tools/ToolUtils.h" |
| #include "tools/fonts/FontToolUtils.h" |
| #include "tools/timer/TimeUtils.h" |
| |
| #define WIDTH 660 |
| #define HEIGHT 660 |
| |
| namespace skiagm { |
| |
| class ImageLightingGM : public GM { |
| public: |
| ImageLightingGM() |
| : fAzimuth(SkIntToScalar(kStartAzimuth)) { |
| this->setBGColor(0xFF000000); |
| } |
| |
| protected: |
| SkString getName() const override { return SkString("lighting"); } |
| |
| SkISize getISize() 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->clipIRect(fBitmap.bounds()); |
| canvas->drawImage(fBitmap.asImage(), 0, 0, SkSamplingOptions(), &paint); |
| canvas->restore(); |
| } |
| |
| void onOnceBeforeDraw() override { |
| fBitmap = ToolUtils::CreateStringBitmap(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 spotExponent1 = SK_Scalar1; |
| SkScalar spotExponent10 = SkIntToScalar(10); |
| SkScalar cutoffAngleSmall = SkIntToScalar(15); |
| SkScalar cutoffAngleNone = SkIntToScalar(180); |
| |
| 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 kd = SkIntToScalar(2); |
| SkScalar ks = SkIntToScalar(1); |
| SkScalar shininess = SkIntToScalar(8); |
| SkScalar surfaceScale = SkIntToScalar(1); |
| SkScalar surfaceScaleSmall = 0.1f; |
| SkColor greenYellow = SkColorSetARGB(255, 173, 255, 47); |
| SkPaint paint; |
| |
| SkIRect cropRect = SkIRect::MakeXYWH(20, 10, 60, 65); |
| SkIRect fullSizeCropRect = SkIRect::MakeXYWH(0, 0, 100, 100); |
| sk_sp<SkImageFilter> noopCropped(SkImageFilters::Offset(0, 0, nullptr, &cropRect)); |
| |
| int y = 0; |
| for (int i = 0; i < 3; i++) { |
| const SkIRect* cr = (i == 1) ? &cropRect : (i == 2) ? &fullSizeCropRect : nullptr; |
| sk_sp<SkImageFilter> input = (i == 2) ? noopCropped : nullptr; |
| // Basic point, distant and spot lights with diffuse lighting |
| paint.setImageFilter(SkImageFilters::PointLitDiffuse( |
| pointLocation, SK_ColorWHITE, surfaceScale, kd, input, cr)); |
| drawClippedBitmap(canvas, paint, 0, y); |
| |
| paint.setImageFilter(SkImageFilters::DistantLitDiffuse( |
| distantDirection, SK_ColorWHITE, surfaceScale, kd, input, cr)); |
| drawClippedBitmap(canvas, paint, 110, y); |
| |
| paint.setImageFilter(SkImageFilters::SpotLitDiffuse( |
| spotLocation, spotTarget, spotExponent1, cutoffAngleSmall, SK_ColorWHITE, |
| surfaceScale, kd, input, cr)); |
| drawClippedBitmap(canvas, paint, 220, y); |
| |
| // Spot light with no angle cutoff |
| paint.setImageFilter(SkImageFilters::SpotLitDiffuse( |
| spotLocation, spotTarget, spotExponent10, cutoffAngleNone, SK_ColorWHITE, |
| surfaceScale, kd, input, cr)); |
| drawClippedBitmap(canvas, paint, 330, y); |
| |
| // Spot light with falloff exponent |
| paint.setImageFilter(SkImageFilters::SpotLitDiffuse( |
| spotLocation, spotTarget, spotExponent1, cutoffAngleNone, SK_ColorWHITE, |
| surfaceScaleSmall, kd, input, cr)); |
| drawClippedBitmap(canvas, paint, 440, y); |
| |
| // Large constant to show oversaturation |
| paint.setImageFilter(SkImageFilters::DistantLitDiffuse( |
| distantDirection, greenYellow, surfaceScale, 4.f * kd, input, cr)); |
| drawClippedBitmap(canvas, paint, 550, y); |
| |
| y += 110; |
| |
| // Basic point, distant and spot lights with specular lighting |
| paint.setImageFilter(SkImageFilters::PointLitSpecular( |
| pointLocation, SK_ColorWHITE, surfaceScale, ks, shininess, input, cr)); |
| drawClippedBitmap(canvas, paint, 0, y); |
| |
| paint.setImageFilter(SkImageFilters::DistantLitSpecular( |
| distantDirection, SK_ColorWHITE, surfaceScale, ks, shininess, input, cr)); |
| drawClippedBitmap(canvas, paint, 110, y); |
| |
| paint.setImageFilter(SkImageFilters::SpotLitSpecular( |
| spotLocation, spotTarget, spotExponent1, cutoffAngleSmall, SK_ColorWHITE, |
| surfaceScale, ks, shininess, input, cr)); |
| drawClippedBitmap(canvas, paint, 220, y); |
| |
| // Spot light with no angle cutoff |
| paint.setImageFilter(SkImageFilters::SpotLitSpecular( |
| spotLocation, spotTarget, spotExponent10, cutoffAngleNone, SK_ColorWHITE, |
| surfaceScale, ks, shininess, input, cr)); |
| drawClippedBitmap(canvas, paint, 330, y); |
| |
| // Spot light with falloff exponent |
| paint.setImageFilter(SkImageFilters::SpotLitSpecular( |
| spotLocation, spotTarget, spotExponent1, cutoffAngleNone, SK_ColorWHITE, |
| surfaceScaleSmall, ks, shininess, input, cr)); |
| drawClippedBitmap(canvas, paint, 440, y); |
| |
| // Large constant to show oversaturation |
| paint.setImageFilter(SkImageFilters::DistantLitSpecular( |
| distantDirection, greenYellow, surfaceScale, 4.f * ks, shininess, input, cr)); |
| drawClippedBitmap(canvas, paint, 550, 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: |
| inline static constexpr int kStartAzimuth = 225; |
| |
| SkBitmap fBitmap; |
| SkScalar fAzimuth; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new ImageLightingGM;) |
| } // namespace skiagm |