| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkColor.h" |
| #include "SkBitmapSource.h" |
| #include "SkBlurImageFilter.h" |
| #include "SkDisplacementMapEffect.h" |
| #include "SkDropShadowImageFilter.h" |
| #include "SkGradientShader.h" |
| #include "SkMorphologyImageFilter.h" |
| #include "SkOffsetImageFilter.h" |
| #include "SkScalar.h" |
| |
| namespace skiagm { |
| |
| class ImageFiltersScaledGM : public GM { |
| public: |
| ImageFiltersScaledGM() : fInitialized(false) { |
| this->setBGColor(0x00000000); |
| } |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("imagefiltersscaled"); |
| } |
| |
| virtual SkISize onISize() { |
| return make_isize(860, 500); |
| } |
| |
| void make_checkerboard() { |
| fCheckerboard.allocN32Pixels(64, 64); |
| SkCanvas canvas(fCheckerboard); |
| canvas.clear(0x00000000); |
| SkPaint darkPaint; |
| darkPaint.setColor(0xFF404040); |
| SkPaint lightPaint; |
| lightPaint.setColor(0xFFA0A0A0); |
| for (int y = 0; y < 64; y += 16) { |
| for (int x = 0; x < 64; x += 16) { |
| canvas.save(); |
| canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); |
| canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); |
| canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); |
| canvas.restore(); |
| } |
| } |
| } |
| |
| void make_gradient_circle(int width, int height) { |
| SkScalar x = SkIntToScalar(width / 2); |
| SkScalar y = SkIntToScalar(height / 2); |
| SkScalar radius = SkScalarMul(SkMinScalar(x, y), SkIntToScalar(4) / SkIntToScalar(5)); |
| fGradientCircle.allocN32Pixels(width, height); |
| SkCanvas canvas(fGradientCircle); |
| canvas.clear(0x00000000); |
| SkColor colors[2]; |
| colors[0] = SK_ColorWHITE; |
| colors[1] = SK_ColorBLACK; |
| SkAutoTUnref<SkShader> shader( |
| SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, NULL, 2, |
| SkShader::kClamp_TileMode) |
| ); |
| SkPaint paint; |
| paint.setShader(shader); |
| canvas.drawCircle(x, y, radius, paint); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| if (!fInitialized) { |
| this->make_checkerboard(); |
| this->make_gradient_circle(64, 64); |
| fInitialized = true; |
| } |
| canvas->clear(0x00000000); |
| |
| SkAutoTUnref<SkImageFilter> gradient(new SkBitmapSource(fGradientCircle)); |
| SkAutoTUnref<SkImageFilter> checkerboard(new SkBitmapSource(fCheckerboard)); |
| |
| SkImageFilter* filters[] = { |
| new SkBlurImageFilter(SkIntToScalar(4), SkIntToScalar(4)), |
| new SkDropShadowImageFilter(SkIntToScalar(5), SkIntToScalar(10), SkIntToScalar(3), |
| SK_ColorYELLOW), |
| new SkDisplacementMapEffect(SkDisplacementMapEffect::kR_ChannelSelectorType, |
| SkDisplacementMapEffect::kR_ChannelSelectorType, |
| SkIntToScalar(12), |
| gradient.get(), |
| checkerboard.get()), |
| new SkDilateImageFilter(1, 1, checkerboard.get()), |
| new SkErodeImageFilter(1, 1, checkerboard.get()), |
| new SkOffsetImageFilter(SkIntToScalar(32), 0), |
| }; |
| |
| SkVector scales[] = { |
| SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)), |
| SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)), |
| SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)), |
| SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)), |
| SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)), |
| }; |
| |
| SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64)); |
| SkScalar margin = SkIntToScalar(16); |
| SkRect bounds = r; |
| bounds.outset(margin, margin); |
| |
| for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) { |
| canvas->save(); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| SkPaint paint; |
| paint.setColor(SK_ColorBLUE); |
| paint.setImageFilter(filters[i]); |
| paint.setAntiAlias(true); |
| canvas->save(); |
| canvas->scale(scales[j].fX, scales[j].fY); |
| if (5 == i) { |
| canvas->translate(SkIntToScalar(-32), 0); |
| } |
| canvas->drawCircle(r.centerX(), r.centerY(), |
| SkScalarDiv(r.width()*2, SkIntToScalar(5)), paint); |
| canvas->restore(); |
| canvas->translate(r.width() * scales[j].fX + margin, 0); |
| } |
| canvas->restore(); |
| canvas->translate(0, r.height() * scales[j].fY + margin); |
| } |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| filters[i]->unref(); |
| } |
| } |
| |
| private: |
| bool fInitialized; |
| SkBitmap fCheckerboard; |
| SkBitmap fGradientCircle; |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new ImageFiltersScaledGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |