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 "SkBlurMask.h"
  10 #include "SkBlurMaskFilter.h"
  11 #include "SkCanvas.h"
  12 #include "SkColorFilter.h"
  13 #include "SkLayerDrawLooper.h"
  14 #include "SkPaint.h"
  15 #include "SkPath.h"
  16 #include "SkPoint.h"
  17 #include "SkRect.h"
  18 #include "SkRRect.h"
  19 #include "SkString.h"
  20 #include "SkXfermode.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, int radius)
  26         : fName("blurroundrect")
  27     {
  28         SkRect r = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
  29         fRRect.setRectXY(r, SkIntToScalar(radius), SkIntToScalar(radius));
  30         fName.appendf("-WH-%ix%i-corner-%i", width, height, radius);
  31     }
  32
  33     BlurRoundRectGM(int width, int height)
  34         : fName("blurroundrect") {
  35         fName.appendf("-WH-%ix%i-unevenCorners", width,  height);
  36         SkVector radii[4];
  37         radii[0].set(SkIntToScalar(30), SkIntToScalar(30));
  38         radii[1].set(SkIntToScalar(10), SkIntToScalar(10));
  39         radii[2].set(SkIntToScalar(30), SkIntToScalar(30));
  40         radii[3].set(SkIntToScalar(10), SkIntToScalar(10));
  41         SkRect r = SkRect::MakeWH(SkIntToScalar(width), SkIntToScalar(height));
  42         fRRect.setRectRadii(r, radii);
  43     }
  44
  45     SkString onShortName() SK_OVERRIDE {
  46         return fName;
  47     }
  48
  49     SkISize onISize() SK_OVERRIDE {
  50         return SkISize::Make(SkScalarCeilToInt(fRRect.rect().width()),
  51                              SkScalarCeilToInt(fRRect.rect().height()));
  52     }
  53
  54     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
  55         SkLayerDrawLooper::Builder looperBuilder;
  56         {
  57             SkLayerDrawLooper::LayerInfo info;
  58             info.fPaintBits = SkLayerDrawLooper::kMaskFilter_Bit
  59                               | SkLayerDrawLooper::kColorFilter_Bit;
  60             info.fColorMode = SkXfermode::kSrc_Mode;
  61             info.fOffset = SkPoint::Make(SkIntToScalar(-1), SkIntToScalar(0));
  62             info.fPostTranslate = false;
  63             SkPaint* paint = looperBuilder.addLayerOnTop(info);
  64             SkMaskFilter* maskFilter = SkBlurMaskFilter::Create(
  65                     kNormal_SkBlurStyle,
  66                     SkBlurMask::ConvertRadiusToSigma(SK_ScalarHalf),
  67                     SkBlurMaskFilter::kHighQuality_BlurFlag);
  68             paint->setMaskFilter(maskFilter)->unref();
  69             SkColorFilter* colorFilter = SkColorFilter::CreateModeFilter(SK_ColorLTGRAY,
  70                     SkXfermode::kSrcIn_Mode);
  71             paint->setColorFilter(colorFilter)->unref();
  72             paint->setColor(SK_ColorGRAY);
  73         }
  74         {
  75             SkLayerDrawLooper::LayerInfo info;
  76             looperBuilder.addLayerOnTop(info);
  77         }
  78         SkPaint paint;
  79         canvas->drawRect(fRRect.rect(), paint);
  80
  81         paint.setLooper(looperBuilder.detachLooper())->unref();
  82         paint.setColor(SK_ColorCYAN);
  83         paint.setAntiAlias(true);
  84
  85         canvas->drawRRect(fRRect, paint);
  86     }
  87
  88 private:
  89     SkString        fName;
  90     SkRRect         fRRect;
  91
  92     typedef skiagm::GM INHERITED;
  93 };
  94
  95 #include "SkGradientShader.h"
  96 /*
  97  * Spits out a dummy gradient to test blur with shader on paint
  98  */
  99 static SkShader* MakeRadial() {
 100     SkPoint pts[2] = {
 101         { 0, 0 },
 102         { SkIntToScalar(100), SkIntToScalar(100) }
 103     };
 104     SkShader::TileMode tm = SkShader::kClamp_TileMode;
 105     const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, };
 106     const SkScalar pos[] = { SK_Scalar1/4, SK_Scalar1*3/4 };
 107     SkMatrix scale;
 108     scale.setScale(0.5f, 0.5f);
 109     scale.postTranslate(5.f, 5.f);
 110     SkPoint center0, center1;
 111     center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
 112                 SkScalarAve(pts[0].fY, pts[1].fY));
 113     center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
 114                 SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
 115     return SkGradientShader::CreateTwoPointRadial(center1, (pts[1].fX - pts[0].fX) / 7,
 116                                                   center0, (pts[1].fX - pts[0].fX) / 2,
 117                                                   colors, pos, SK_ARRAY_COUNT(colors), tm,
 118                                                   0, &scale);
 119 }
 120
 121 // Simpler blurred RR test cases where all the radii are the same.
 122 class SimpleBlurRoundRectGM : public skiagm::GM {
 123 public:
 124     SimpleBlurRoundRectGM()
 125         : fName("simpleblurroundrect") {
 126     }
 127
 128 protected:
 129
 130     SkString onShortName() SK_OVERRIDE {
 131         return fName;
 132     }
 133
 134     SkISize onISize() SK_OVERRIDE {
 135         return SkISize::Make(1000, 500);
 136     }
 137
 138     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
 139         canvas->scale(1.5f, 1.5f);
 140         canvas->translate(50,50);
 141
 142         const float blurRadii[] = { 1,5,10,20 };
 143         const int cornerRadii[] = { 1,5,10,20 };
 144         const SkRect r = SkRect::MakeWH(SkIntToScalar(25), SkIntToScalar(25));
 145         for (size_t i = 0; i < SK_ARRAY_COUNT(blurRadii); ++i) {
 146             SkAutoCanvasRestore autoRestore(canvas, true);
 147             canvas->translate(0, (r.height() + SkIntToScalar(50)) * i);
 148             for (size_t j = 0; j < SK_ARRAY_COUNT(cornerRadii); ++j) {
 149                 for (int k = 0; k <= 1; k++) {
 150                     SkMaskFilter* filter = SkBlurMaskFilter::Create(
 151                         kNormal_SkBlurStyle,
 152                         SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(blurRadii[i])),
 153                         SkBlurMaskFilter::kHighQuality_BlurFlag);
 154                     SkPaint paint;
 155                     paint.setColor(SK_ColorBLACK);
 156                     paint.setMaskFilter(filter)->unref();
 157
 158                     bool useRadial = SkToBool(k);
 159                     if (useRadial) {
 160                         paint.setShader(MakeRadial())->unref();
 161                     }
 162
 163                     SkRRect rrect;
 164                     rrect.setRectXY(r, SkIntToScalar(cornerRadii[j]),
 165                                     SkIntToScalar(cornerRadii[j]));
 166                     canvas->drawRRect(rrect, paint);
 167                     canvas->translate(r.width() + SkIntToScalar(50), 0);
 168                 }
 169             }
 170         }
 171     }
 172 private:
 173     const SkString  fName;
 174
 175     typedef         skiagm::GM INHERITED;
 176 };
 177
 178 // Create one with dimensions/rounded corners based on the skp
 179 //
 180 // TODO(scroggo): Disabled in an attempt to rememdy
 181 // https://code.google.com/p/skia/issues/detail?id=1801 ('Win7 Test bots all failing GenerateGMs:
 182 // ran wrong number of tests')
 183 //DEF_GM(return new BlurRoundRectGM(600, 5514, 6);)
 184
 185 // Rounded rect with two opposite corners with large radii, the other two
 186 // small.
 187 DEF_GM(return new BlurRoundRectGM(100, 100);)
 188
 189 DEF_GM(return new SimpleBlurRoundRectGM();)