gm/imagefiltersclipped.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_X SkIntToScalar(2)
  27 #define RESIZE_FACTOR_Y SkIntToScalar(5)
  28
  29 static sk_sp<SkImage> make_gradient_circle(int width, int height) {
  30     SkScalar x = SkIntToScalar(width / 2);
  31     SkScalar y = SkIntToScalar(height / 2);
  32     SkScalar radius = SkMinScalar(x, y) * 0.8f;
  33     auto surface(SkSurface::MakeRasterN32Premul(width, height));
  34     SkCanvas* canvas = surface->getCanvas();
  35     canvas->clear(0x00000000);
  36     SkColor colors[2];
  37     colors[0] = SK_ColorWHITE;
  38     colors[1] = SK_ColorBLACK;
  39     SkPaint paint;
  40     paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
  41         2, SkShader::kClamp_TileMode));
  42     canvas->drawCircle(x, y, radius, paint);
  43     return surface->makeImageSnapshot();
  44 }
  45
  46 static void draw_clipped_filter(SkCanvas* canvas, sk_sp<SkImageFilter> filter, size_t i,
  47                                 const SkRect& primBounds, const SkRect& clipBounds) {
  48     SkPaint paint;
  49     paint.setColor(SK_ColorWHITE);
  50     paint.setImageFilter(std::move(filter));
  51     paint.setAntiAlias(true);
  52     canvas->save();
  53     canvas->clipRect(clipBounds);
  54     if (5 == i) {
  55         canvas->translate(SkIntToScalar(16), SkIntToScalar(-32));
  56     } else if (6 == i) {
  57         canvas->scale(SkScalarInvert(RESIZE_FACTOR_X), SkScalarInvert(RESIZE_FACTOR_Y));
  58     }
  59     canvas->drawCircle(primBounds.centerX(), primBounds.centerY(),
  60                        primBounds.width() * 2 / 5, paint);
  61     canvas->restore();
  62 }
  63
  64 namespace skiagm {
  65
  66 class ImageFiltersClippedGM : public GM {
  67 public:
  68     ImageFiltersClippedGM() {
  69         this->setBGColor(0x00000000);
  70     }
  71
  72 protected:
  73     SkString onShortName() override {
  74         return SkString("imagefiltersclipped");
  75     }
  76
  77     SkISize onISize() override {
  78         return SkISize::Make(860, 500);
  79     }
  80
  81     void onOnceBeforeDraw() override {
  82         fCheckerboard = SkImage::MakeFromBitmap
  83             (sk_tool_utils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8));
  84         fGradientCircle = make_gradient_circle(64, 64);
  85     }
  86
  87     void onDraw(SkCanvas* canvas) override {
  88         canvas->clear(SK_ColorBLACK);
  89
  90         sk_sp<SkImageFilter> gradient(SkImageSource::Make(fGradientCircle));
  91         sk_sp<SkImageFilter> checkerboard(SkImageSource::Make(fCheckerboard));
  92         SkMatrix resizeMatrix;
  93         resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
  94         SkPoint3 pointLocation = SkPoint3::Make(32, 32, SkIntToScalar(10));
  95
  96         sk_sp<SkImageFilter> filters[] = {
  97             SkBlurImageFilter::Make(SkIntToScalar(12), SkIntToScalar(12), nullptr),
  98             SkDropShadowImageFilter::Make(
  99                                     SkIntToScalar(10), SkIntToScalar(10),
 100                                     SkIntToScalar(3), SkIntToScalar(3), SK_ColorGREEN,
 101                                     SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
 102                                     nullptr),
 103             SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType,
 104                                           SkDisplacementMapEffect::kR_ChannelSelectorType,
 105                                           SkIntToScalar(12),
 106                                           std::move(gradient),
 107                                           checkerboard),
 108             SkDilateImageFilter::Make(2, 2, checkerboard),
 109             SkErodeImageFilter::Make(2, 2, checkerboard),
 110             SkOffsetImageFilter::Make(SkIntToScalar(-16), SkIntToScalar(32), nullptr),
 111             SkImageFilter::MakeMatrixFilter(resizeMatrix, kNone_SkFilterQuality, nullptr),
 112             SkLightingImageFilter::MakePointLitDiffuse(pointLocation, SK_ColorWHITE, SK_Scalar1,
 113                                                        SkIntToScalar(2), checkerboard),
 114
 115         };
 116
 117         SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
 118         SkScalar margin = SkIntToScalar(16);
 119         SkRect bounds = r;
 120         bounds.outset(margin, margin);
 121
 122         canvas->save();
 123         for (int xOffset = 0; xOffset < 80; xOffset += 16) {
 124             canvas->save();
 125             bounds.fLeft = SkIntToScalar(xOffset);
 126             for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
 127                 draw_clipped_filter(canvas, filters[i], i, r, bounds);
 128                 canvas->translate(r.width() + margin, 0);
 129             }
 130             canvas->restore();
 131             canvas->translate(0, r.height() + margin);
 132         }
 133         canvas->restore();
 134
 135         SkPaint noisePaint;
 136         noisePaint.setShader(SkPerlinNoiseShader::MakeFractalNoise(0.1f, 0.05f, 1, 0));
 137
 138         sk_sp<SkImageFilter> rectFilter(SkPaintImageFilter::Make(noisePaint));
 139         canvas->translate(SK_ARRAY_COUNT(filters)*(r.width() + margin), 0);
 140         for (int xOffset = 0; xOffset < 80; xOffset += 16) {
 141             bounds.fLeft = SkIntToScalar(xOffset);
 142             draw_clipped_filter(canvas, rectFilter, 0, r, bounds);
 143             canvas->translate(0, r.height() + margin);
 144         }
 145     }
 146
 147 private:
 148     sk_sp<SkImage> fCheckerboard, fGradientCircle;
 149
 150     typedef GM INHERITED;
 151 };
 152
 153 //////////////////////////////////////////////////////////////////////////////
 154
 155 DEF_GM(return new ImageFiltersClippedGM;)
 156 }