gm/blurroundrect.cpp

   1 /*
   2 * Copyright 2013 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 "gm.h"
   9 #include "sk_tool_utils.h"
  10 #include "SkBlurMask.h"
  11 #include "SkBlurMaskFilter.h"
  12 #include "SkCanvas.h"
  13 #include "SkColorFilter.h"
  14 #include "SkLayerDrawLooper.h"
  15 #include "SkPaint.h"
  16 #include "SkPath.h"
  17 #include "SkPoint.h"
  18 #include "SkRect.h"
  19 #include "SkRRect.h"
  20 #include "SkString.h"
  21
  22 // This GM mimics a blurred RR seen in the wild.
  23 class BlurRoundRectGM : public skiagm::GM {
  24 public:
  25     BlurRoundRectGM(int width, int height)
  26         : fName("blurroundrect"), fWidth(width), fHeight(height) {
  27         fName.appendf("-WH-%ix%i-unevenCorners", width,  height);
  28     }
  29
  30     SkString onShortName() override {
  31         return fName;
  32     }
  33
  34     SkISize onISize() override {
  35         return SkISize::Make(fWidth, fHeight);
  36     }
  37
  38     void onOnceBeforeDraw() override {
  39         SkVector radii[4];
  40         radii[0].set(SkIntToScalar(30), SkIntToScalar(30));
  41         radii[1].set(SkIntToScalar(10), SkIntToScalar(10));
  42         radii[2].set(SkIntToScalar(30), SkIntToScalar(30));
  43         radii[3].set(SkIntToScalar(10), SkIntToScalar(10));
  44         SkRect r = SkRect::MakeWH(SkIntToScalar(fWidth), SkIntToScalar(fHeight));
  45         fRRect.setRectRadii(r, radii);
  46     }
  47
  48     void onDraw(SkCanvas* canvas) override {
  49         SkLayerDrawLooper::Builder looperBuilder;
  50         {
  51             SkLayerDrawLooper::LayerInfo info;
  52             info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
  53                               | SkLayerDrawLooper::kColorFilter_Bit;
  54             info.fColorMode = SkBlendMode::kSrc;
  55             info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
  56             info.fPostTranslate = false;
  57             SkPaint* paint = looperBuilder.addLayerOnTop(info);
  58             paint->setMaskFilter(SkBlurMaskFilter::Make(
  59                     kNormal_SkBlurStyle,
  60                     SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
  61                     SkBlurMaskFilter::kHighQuality_BlurFlag));
  62             paint->setColorFilter(SkColorFilter::MakeModeFilter(
  63                     sk_tool_utils::color_to_565(SK_ColorLTGRAY),
  64                     SkBlendMode::kSrcIn));
  65             paint->setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
  66         }
  67         {
  68             SkLayerDrawLooper::LayerInfo info;
  69             looperBuilder.addLayerOnTop(info);
  70         }
  71         SkPaint paint;
  72         canvas->drawRect(fRRect.rect(), paint);
  73
  74         paint.setLooper(looperBuilder.detach());
  75         paint.setColor(SK_ColorCYAN);
  76         paint.setAntiAlias(true);
  77
  78         canvas->drawRRect(fRRect, paint);
  79     }
  80
  81 private:
  82     SkString        fName;
  83     SkRRect         fRRect;
  84     int             fWidth, fHeight;
  85
  86     typedef skiagm::GM INHERITED;
  87 };
  88
  89 #include "SkGradientShader.h"
  90 /*
  91  * Spits out a dummy gradient to test blur with shader on paint
  92  */
  93 static sk_sp<SkShader> MakeRadial() {
  94     SkPoint pts[2] = {
  95         { 0, 0 },
  96         { SkIntToScalar(100), SkIntToScalar(100) }
  97     };
  98     SkShader::TileMode tm = SkShader::kClamp_TileMode;
  99     const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, };
 100     const SkScalar pos[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
 101     SkMatrix scale;
 102     scale.setScale(0.5f, 0.5f);
 103     scale.postTranslate(5.f, 5.f);
 104     SkPoint center0, center1;
 105     center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
 106                 SkScalarAve(pts[0].fY, pts[1].fY));
 107     center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
 108                 SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
 109     return SkGradientShader::MakeTwoPointConical(center1, (pts[1].fX - pts[0].fX) / 7,
 110                                                  center0, (pts[1].fX - pts[0].fX) / 2,
 111                                                  colors, pos, SK_ARRAY_COUNT(colors), tm,
 112                                                  0, &scale);
 113 }
 114
 115 // Simpler blurred RR test cases where all the radii are the same.
 116 class SimpleBlurRoundRectGM : public skiagm::GM {
 117 public:
 118     SimpleBlurRoundRectGM()
 119         : fName("simpleblurroundrect") {
 120     }
 121
 122 protected:
 123
 124     SkString onShortName() override {
 125         return fName;
 126     }
 127
 128     SkISize onISize() override {
 129         return SkISize::Make(1000, 500);
 130     }
 131
 132     void onDraw(SkCanvas* canvas) override {
 133         canvas->scale(1.5f, 1.5f);
 134         canvas->translate(50,50);
 135
 136         const float blurRadii[] = { 1,5,10,20 };
 137         const int cornerRadii[] = { 1,5,10,20 };
 138         const SkRect r = SkRect::MakeWH(SkIntToScalar(25), SkIntToScalar(25));
 139         for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
 140             SkAutoCanvasRestore autoRestore(canvas, true);
 141             canvas->translate(0, (r.height() + SkIntToScalar(50)) * i);
 142             for (size_t j = 0; j < SK_ARRAY_COUNT(cornerRadii); ++j) {
 143                 for (int k = 0; k <= 1; k++) {
 144                     SkPaint paint;
 145                     paint.setColor(SK_ColorBLACK);
 146                     paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
 147                                    SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
 148                                    SkBlurMaskFilter::kHighQuality_BlurFlag));
 149
 150                     bool useRadial = SkToBool(k);
 151                     if (useRadial) {
 152                         paint.setShader(MakeRadial());
 153                     }
 154
 155                     SkRRect rrect;
 156                     rrect.setRectXY(r, SkIntToScalar(cornerRadii[j]),
 157                                     SkIntToScalar(cornerRadii[j]));
 158                     canvas->drawRRect(rrect, paint);
 159                     canvas->translate(r.width() + SkIntToScalar(50), 0);
 160                 }
 161             }
 162         }
 163     }
 164 private:
 165     const SkString  fName;
 166
 167     typedef         skiagm::GM INHERITED;
 168 };
 169
 170 // Create one with dimensions/rounded corners based on the skp
 171 //
 172 // TODO(scroggo): Disabled in an attempt to rememdy
 173 // https://code.google.com/p/skia/issues/detail?id=1801 ('Win7 Test bots all failing GenerateGMs:
 174 // ran wrong number of tests')
 175 //DEF_GM(return new BlurRoundRectGM(600, 5514, 6);)
 176
 177 // Rounded rect with two opposite corners with large radii, the other two
 178 // small.
 179 DEF_GM(return new BlurRoundRectGM(100, 100);)
 180
 181 DEF_GM(return new SimpleBlurRoundRectGM();)