gm/imagefiltersscaled.cpp

   1 /*
   2  * Copyright 2014 Google Inc.
   3  *
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7
   8 #include "SkBlurImageFilter.h"
   9 #include "SkColor.h"
  10 #include "SkDisplacementMapEffect.h"
  11 #include "SkDropShadowImageFilter.h"
  12 #include "SkGradientShader.h"
  13 #include "SkImage.h"
  14 #include "SkImageSource.h"
  15 #include "SkLightingImageFilter.h"
  16 #include "SkMorphologyImageFilter.h"
  17 #include "SkOffsetImageFilter.h"
  18 #include "SkPaintImageFilter.h"
  19 #include "SkPerlinNoiseShader.h"
  20 #include "SkPoint3.h"
  21 #include "SkScalar.h"
  22 #include "SkSurface.h"
  23 #include "gm.h"
  24 #include "sk_tool_utils.h"
  25
  26 #define RESIZE_FACTOR SkIntToScalar(4)
  27
  28 static sk_sp<SkImage> make_gradient_circle(int width, int height) {
  29     SkScalar x = SkIntToScalar(width / 2);
  30     SkScalar y = SkIntToScalar(height / 2);
  31     SkScalar radius = SkMinScalar(x, y) * 4 / 5;
  32     sk_sp<SkSurface> surface(SkSurface::MakeRasterN32Premul(width, height));
  33     SkCanvas* canvas = surface->getCanvas();
  34     canvas->clear(0x00000000);
  35     SkColor colors[2];
  36     colors[0] = SK_ColorWHITE;
  37     colors[1] = SK_ColorBLACK;
  38     SkPaint paint;
  39     paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
  40         2, SkShader::kClamp_TileMode));
  41     canvas->drawCircle(x, y, radius, paint);
  42
  43     return surface->makeImageSnapshot();
  44 }
  45
  46
  47 namespace skiagm {
  48
  49 class ImageFiltersScaledGM : public GM {
  50 public:
  51     ImageFiltersScaledGM() {
  52         this->setBGColor(0x00000000);
  53     }
  54
  55 protected:
  56
  57     SkString onShortName() override {
  58         return SkString("imagefiltersscaled");
  59     }
  60
  61     SkISize onISize() override {
  62         return SkISize::Make(1428, 500);
  63     }
  64
  65     void onOnceBeforeDraw() override {
  66         fCheckerboard = SkImage::MakeFromBitmap(
  67             sk_tool_utils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8));
  68         fGradientCircle = make_gradient_circle(64, 64);
  69     }
  70
  71     void onDraw(SkCanvas* canvas) override {
  72         canvas->clear(SK_ColorBLACK);
  73
  74         sk_sp<SkImageFilter> gradient(SkImageSource::Make(fGradientCircle));
  75         sk_sp<SkImageFilter> checkerboard(SkImageSource::Make(fCheckerboard));
  76
  77         SkPaint noisePaint;
  78         noisePaint.setShader(SkPerlinNoiseShader::MakeFractalNoise(SkDoubleToScalar(0.1),
  79                                                                    SkDoubleToScalar(0.05), 1, 0));
  80
  81         SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10));
  82         SkPoint3 spotLocation = SkPoint3::Make(SkIntToScalar(-10),
  83                                                SkIntToScalar(-10),
  84                                                SkIntToScalar(20));
  85         SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
  86         SkScalar spotExponent = SK_Scalar1;
  87         SkScalar cutoffAngle = SkIntToScalar(15);
  88         SkScalar kd = SkIntToScalar(2);
  89         SkScalar surfaceScale = SkIntToScalar(1);
  90         SkColor white(0xFFFFFFFF);
  91         SkMatrix resizeMatrix;
  92         resizeMatrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
  93
  94         sk_sp<SkImageFilter> filters[] = {
  95             SkBlurImageFilter::Make(SkIntToScalar(4), SkIntToScalar(4), nullptr),
  96             SkDropShadowImageFilter::Make(
  97                                     SkIntToScalar(5), SkIntToScalar(10),
  98                                     SkIntToScalar(3), SkIntToScalar(3), SK_ColorYELLOW,
  99                                     SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
 100                                     nullptr),
 101             SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType,
 102                                           SkDisplacementMapEffect::kR_ChannelSelectorType,
 103                                           SkIntToScalar(12),
 104                                           std::move(gradient),
 105                                           checkerboard),
 106             SkDilateImageFilter::Make(1, 1, checkerboard),
 107             SkErodeImageFilter::Make(1, 1, checkerboard),
 108             SkOffsetImageFilter::Make(SkIntToScalar(32), 0, nullptr),
 109             SkImageFilter::MakeMatrixFilter(resizeMatrix, kNone_SkFilterQuality, nullptr),
 110             SkPaintImageFilter::Make(noisePaint),
 111             SkLightingImageFilter::MakePointLitDiffuse(pointLocation, white, surfaceScale, kd,
 112                                                        nullptr),
 113             SkLightingImageFilter::MakeSpotLitDiffuse(spotLocation, spotTarget, spotExponent,
 114                                                       cutoffAngle, white, surfaceScale, kd,
 115                                                       nullptr),
 116         };
 117
 118         SkVector scales[] = {
 119             SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
 120             SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
 121             SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
 122             SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
 123             SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
 124         };
 125
 126         SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
 127         SkScalar margin = SkIntToScalar(16);
 128         SkRect bounds = r;
 129         bounds.outset(margin, margin);
 130
 131         for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) {
 132             canvas->save();
 133             for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
 134                 SkPaint paint;
 135                 paint.setColor(SK_ColorBLUE);
 136                 paint.setImageFilter(filters[i]);
 137                 paint.setAntiAlias(true);
 138                 canvas->save();
 139                 canvas->scale(scales[j].fX, scales[j].fY);
 140                 canvas->clipRect(r);
 141                 if (5 == i) {
 142                     canvas->translate(SkIntToScalar(-32), 0);
 143                 } else if (6 == i) {
 144                     canvas->scale(SkScalarInvert(RESIZE_FACTOR),
 145                                   SkScalarInvert(RESIZE_FACTOR));
 146                 }
 147                 canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
 148                 canvas->restore();
 149                 canvas->translate(r.width() * scales[j].fX + margin, 0);
 150             }
 151             canvas->restore();
 152             canvas->translate(0, r.height() * scales[j].fY + margin);
 153         }
 154     }
 155
 156 private:
 157     sk_sp<SkImage> fCheckerboard, fGradientCircle;
 158
 159     typedef GM INHERITED;
 160 };
 161
 162 //////////////////////////////////////////////////////////////////////////////
 163
 164 DEF_GM(return new ImageFiltersScaledGM;)
 165 }