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      1 /*
      2  * Copyright 2011 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 
      9 #include "gm.h"
     10 #include "SkCanvas.h"
     11 #include "SkPath.h"
     12 #include "SkRandom.h"
     13 
     14 namespace skiagm {
     15 
     16 class ComplexClip2GM : public GM {
     17 public:
     18     ComplexClip2GM(bool doPaths, bool antiAlias)
     19     : fDoPaths(doPaths)
     20     , fAntiAlias(antiAlias) {
     21         this->setBGColor(SkColorSetRGB(0xDD,0xA0,0xDD));
     22 
     23         // offset the rects a bit so we get antialiasing even in the rect case
     24         SkScalar xA = 0.65f;
     25         SkScalar xB = 10.65f;
     26         SkScalar xC = 20.65f;
     27         SkScalar xD = 30.65f;
     28         SkScalar xE = 40.65f;
     29         SkScalar xF = 50.65f;
     30 
     31         SkScalar yA = 0.65f;
     32         SkScalar yB = 10.65f;
     33         SkScalar yC = 20.65f;
     34         SkScalar yD = 30.65f;
     35         SkScalar yE = 40.65f;
     36         SkScalar yF = 50.65f;
     37 
     38         fWidth = xF - xA;
     39         fHeight = yF - yA;
     40 
     41         fRects[0].set(xB, yB, xE, yE);
     42         fPaths[0].addRoundRect(fRects[0], SkIntToScalar(5), SkIntToScalar(5));
     43         fRectColors[0] = SK_ColorRED;
     44 
     45         fRects[1].set(xA, yA, xD, yD);
     46         fPaths[1].addRoundRect(fRects[1], SkIntToScalar(5), SkIntToScalar(5));
     47         fRectColors[1] = SK_ColorGREEN;
     48 
     49         fRects[2].set(xC, yA, xF, yD);
     50         fPaths[2].addRoundRect(fRects[2], SkIntToScalar(5), SkIntToScalar(5));
     51         fRectColors[2] = SK_ColorBLUE;
     52 
     53         fRects[3].set(xA, yC, xD, yF);
     54         fPaths[3].addRoundRect(fRects[3], SkIntToScalar(5), SkIntToScalar(5));
     55         fRectColors[3] = SK_ColorYELLOW;
     56 
     57         fRects[4].set(xC, yC, xF, yF);
     58         fPaths[4].addRoundRect(fRects[4], SkIntToScalar(5), SkIntToScalar(5));
     59         fRectColors[4] = SK_ColorCYAN;
     60 
     61         fTotalWidth = kCols * fWidth + SK_Scalar1 * (kCols + 1) * kPadX;
     62         fTotalHeight = kRows * fHeight + SK_Scalar1 * (kRows + 1) * kPadY;
     63 
     64         SkRegion::Op ops[] = {
     65             SkRegion::kDifference_Op,
     66             SkRegion::kIntersect_Op,
     67             SkRegion::kUnion_Op,
     68             SkRegion::kXOR_Op,
     69             SkRegion::kReverseDifference_Op,
     70             SkRegion::kReplace_Op,
     71         };
     72 
     73         SkLCGRandom r;
     74         for (int i = 0; i < kRows; ++i) {
     75             for (int j = 0; j < kCols; ++j) {
     76                 for (int k = 0; k < 5; ++k) {
     77                     fOps[j*kRows+i][k] = ops[r.nextU() % SK_ARRAY_COUNT(ops)];
     78                 }
     79             }
     80         }
     81     }
     82 
     83 protected:
     84 
     85     static const int kRows = 5;
     86     static const int kCols = 5;
     87     static const int kPadX = 20;
     88     static const int kPadY = 20;
     89 
     90     virtual SkString onShortName() {
     91         if (!fDoPaths && !fAntiAlias) {
     92             return SkString("complexclip2");
     93         }
     94 
     95         SkString str;
     96         str.printf("complexclip2_%s_%s",
     97                     fDoPaths ? "path" : "rect",
     98                     fAntiAlias ? "aa" : "bw");
     99         return str;
    100     }
    101 
    102     virtual SkISize onISize() {
    103         return make_isize(SkScalarRoundToInt(fTotalWidth),
    104                           SkScalarRoundToInt(fTotalHeight));
    105     }
    106 
    107     virtual void onDraw(SkCanvas* canvas) {
    108         SkPaint rectPaint;
    109         rectPaint.setStyle(SkPaint::kStroke_Style);
    110         rectPaint.setStrokeWidth(-1);
    111 
    112         SkPaint fillPaint;
    113         fillPaint.setColor(SkColorSetRGB(0xA0,0xDD,0xA0));
    114 
    115         for (int i = 0; i < kRows; ++i) {
    116             for (int j = 0; j < kCols; ++j) {
    117                 canvas->save();
    118 
    119                 canvas->translate(kPadX * SK_Scalar1 + (fWidth + kPadX * SK_Scalar1)*j,
    120                                   kPadY * SK_Scalar1 + (fHeight + kPadY * SK_Scalar1)*i);
    121 
    122                 // draw the original shapes first so we can see the
    123                 // antialiasing on the clipped draw
    124                 for (int k = 0; k < 5; ++k) {
    125                     rectPaint.setColor(fRectColors[k]);
    126                     if (fDoPaths) {
    127                         canvas->drawPath(fPaths[k], rectPaint);
    128                     } else {
    129                         canvas->drawRect(fRects[k], rectPaint);
    130                     }
    131                 }
    132 
    133                 for (int k = 0; k < 5; ++k) {
    134                     if (fDoPaths) {
    135                         canvas->clipPath(fPaths[k],
    136                                          fOps[j*kRows+i][k],
    137                                          fAntiAlias);
    138                     } else {
    139                         canvas->clipRect(fRects[k],
    140                                          fOps[j*kRows+i][k],
    141                                          fAntiAlias);
    142                     }
    143                 }
    144                 canvas->drawRect(SkRect::MakeWH(fWidth, fHeight), fillPaint);
    145                 canvas->restore();
    146             }
    147         }
    148     }
    149 private:
    150     bool fDoPaths;
    151     bool fAntiAlias;
    152     SkRect fRects[5];
    153     SkPath fPaths[5];
    154     SkColor fRectColors[5];
    155     SkRegion::Op fOps[kRows * kCols][5];
    156     SkScalar fWidth;
    157     SkScalar fHeight;
    158     SkScalar fTotalWidth;
    159     SkScalar fTotalHeight;
    160 
    161     typedef GM INHERITED;
    162 };
    163 
    164 //////////////////////////////////////////////////////////////////////////////
    165 
    166 // bw rects
    167 static GM* MyFactory(void*) { return new ComplexClip2GM(false, false); }
    168 static GMRegistry reg(MyFactory);
    169 
    170 // bw paths
    171 static GM* MyFactory2(void*) { return new ComplexClip2GM(true, false); }
    172 static GMRegistry reg2(MyFactory2);
    173 
    174 // aa rects
    175 static GM* MyFactory3(void*) { return new ComplexClip2GM(false, true); }
    176 static GMRegistry reg3(MyFactory3);
    177 
    178 // aa paths
    179 static GM* MyFactory4(void*) { return new ComplexClip2GM(true, true); }
    180 static GMRegistry reg4(MyFactory4);
    181 
    182 }
    183