gm/simpleaaclip.cpp

   1 /*
   2  * Copyright 2012 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 "SkAAClip.h"
  11 #include "SkCanvas.h"
  12 #include "SkPath.h"
  13
  14 namespace skiagm {
  15
  16 static void paint_rgn(SkCanvas* canvas, const SkAAClip& clip,
  17                       const SkPaint& paint) {
  18     SkMask mask;
  19     SkBitmap bm;
  20
  21     clip.copyToMask(&mask);
  22
  23     SkAutoMaskFreeImage amfi(mask.fImage);
  24
  25     bm.installMaskPixels(mask);
  26
  27     // need to copy for deferred drawing test to work
  28     SkBitmap bm2;
  29
  30     sk_tool_utils::copy_to(&bm2, bm.colorType(), bm);
  31
  32     canvas->drawBitmap(bm2,
  33                        SK_Scalar1 * mask.fBounds.fLeft,
  34                        SK_Scalar1 * mask.fBounds.fTop,
  35                        &paint);
  36 }
  37
  38 //////////////////////////////////////////////////////////////////////////////
  39 /*
  40  * This GM tests anti aliased single operation booleans with SkAAClips,
  41  * SkRect and SkPaths.
  42  */
  43 class SimpleClipGM : public GM {
  44 public:
  45     enum SkGeomTypes {
  46         kRect_GeomType,
  47         kPath_GeomType,
  48         kAAClip_GeomType
  49     };
  50
  51     SimpleClipGM(SkGeomTypes geomType)
  52     : fGeomType(geomType) {
  53     }
  54
  55 protected:
  56     void onOnceBeforeDraw() override {
  57         // offset the rects a bit so we get anti-aliasing in the rect case
  58         fBase.set(100.65f,
  59                   100.65f,
  60                   150.65f,
  61                   150.65f);
  62         fRect = fBase;
  63         fRect.inset(5, 5);
  64         fRect.offset(25, 25);
  65
  66         fBasePath.addRoundRect(fBase, SkIntToScalar(5), SkIntToScalar(5));
  67         fRectPath.addRoundRect(fRect, SkIntToScalar(5), SkIntToScalar(5));
  68         INHERITED::setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
  69     }
  70
  71     void buildRgn(SkAAClip* clip, SkClipOp op) {
  72         clip->setPath(fBasePath, nullptr, true);
  73
  74         SkAAClip clip2;
  75         clip2.setPath(fRectPath, nullptr, true);
  76         clip->op(clip2, (SkRegion::Op)op);
  77     }
  78
  79     void drawOrig(SkCanvas* canvas) {
  80         SkPaint     paint;
  81
  82         paint.setStyle(SkPaint::kStroke_Style);
  83         paint.setColor(SK_ColorBLACK);
  84
  85         canvas->drawRect(fBase, paint);
  86         canvas->drawRect(fRect, paint);
  87     }
  88
  89     void drawRgnOped(SkCanvas* canvas, SkClipOp op, SkColor color) {
  90
  91         SkAAClip clip;
  92
  93         this->buildRgn(&clip, op);
  94         this->drawOrig(canvas);
  95
  96         SkPaint paint;
  97         paint.setColor(color);
  98         paint_rgn(canvas, clip, paint);
  99     }
 100
 101     void drawPathsOped(SkCanvas* canvas, SkClipOp op, SkColor color) {
 102
 103         this->drawOrig(canvas);
 104
 105         canvas->save();
 106
 107         // create the clip mask with the supplied boolean op
 108         if (kPath_GeomType == fGeomType) {
 109             // path-based case
 110             canvas->clipPath(fBasePath, true);
 111             canvas->clipPath(fRectPath, op, true);
 112         } else {
 113             // rect-based case
 114             canvas->clipRect(fBase, true);
 115             canvas->clipRect(fRect, op, true);
 116         }
 117
 118         // draw a rect that will entirely cover the clip mask area
 119         SkPaint paint;
 120         paint.setColor(color);
 121
 122         SkRect r = SkRect::MakeLTRB(SkIntToScalar(90),  SkIntToScalar(90),
 123                                     SkIntToScalar(180), SkIntToScalar(180));
 124
 125         canvas->drawRect(r, paint);
 126
 127         canvas->restore();
 128     }
 129
 130     SkString onShortName() override {
 131         SkString str;
 132         str.printf("simpleaaclip_%s",
 133                     kRect_GeomType == fGeomType ? "rect" :
 134                     (kPath_GeomType == fGeomType ? "path" :
 135                     "aaclip"));
 136         return str;
 137     }
 138
 139     SkISize onISize() override {
 140         return SkISize::Make(640, 480);
 141     }
 142
 143     void onDraw(SkCanvas* canvas) override {
 144
 145         const struct {
 146             SkColor         fColor;
 147             const char*     fName;
 148             SkClipOp        fOp;
 149         } gOps[] = {
 150             { SK_ColorBLACK,    "Difference", kDifference_SkClipOp    },
 151             { SK_ColorRED,      "Intersect",  kIntersect_SkClipOp     },
 152             { sk_tool_utils::color_to_565(0xFF008800), "Union", kUnion_SkClipOp },
 153             { SK_ColorGREEN,    "Rev Diff",   kReverseDifference_SkClipOp },
 154             { SK_ColorYELLOW,   "Replace",    kReplace_SkClipOp       },
 155             { SK_ColorBLUE,     "XOR",        kXOR_SkClipOp           },
 156         };
 157
 158         SkPaint textPaint;
 159         textPaint.setAntiAlias(true);
 160         sk_tool_utils::set_portable_typeface(&textPaint);
 161         textPaint.setTextSize(SK_Scalar1*24);
 162         int xOff = 0;
 163
 164         for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); op++) {
 165             canvas->drawString(gOps[op].fName,
 166                              SkIntToScalar(75), SkIntToScalar(50),
 167                              textPaint);
 168
 169             if (kAAClip_GeomType == fGeomType) {
 170                 this->drawRgnOped(canvas, gOps[op].fOp, gOps[op].fColor);
 171             } else {
 172                 this->drawPathsOped(canvas, gOps[op].fOp, gOps[op].fColor);
 173             }
 174
 175             if (xOff >= 400) {
 176                 canvas->translate(SkIntToScalar(-400), SkIntToScalar(250));
 177                 xOff = 0;
 178             } else {
 179                 canvas->translate(SkIntToScalar(200), 0);
 180                 xOff += 200;
 181             }
 182         }
 183     }
 184 private:
 185
 186     SkGeomTypes fGeomType;
 187
 188     SkRect fBase;
 189     SkRect fRect;
 190
 191     SkPath fBasePath;       // fBase as a round rect
 192     SkPath fRectPath;       // fRect as a round rect
 193
 194     typedef GM INHERITED;
 195 };
 196
 197 //////////////////////////////////////////////////////////////////////////////
 198
 199 // rects
 200 DEF_GM( return new SimpleClipGM(SimpleClipGM::kRect_GeomType); )
 201 DEF_GM( return new SimpleClipGM(SimpleClipGM::kPath_GeomType); )
 202 DEF_GM( return new SimpleClipGM(SimpleClipGM::kAAClip_GeomType); )
 203
 204 }