1 #include "gm.h" 2 3 namespace skiagm { 4 5 class Poly2PolyGM : public GM { 6 public: 7 Poly2PolyGM() {} 8 9 protected: 10 virtual SkString onShortName() { 11 return SkString("poly2poly"); 12 } 13 14 virtual SkISize onISize() { 15 return make_isize(835, 840); 16 } 17 18 void drawBG(SkCanvas* canvas) { 19 canvas->drawColor(SK_ColorWHITE); 20 } 21 22 static void doDraw(SkCanvas* canvas, SkPaint* paint, const int isrc[], 23 const int idst[], int count) { 24 SkMatrix matrix; 25 SkPoint src[4], dst[4]; 26 27 for (int i = 0; i < count; i++) { 28 src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1])); 29 dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1])); 30 } 31 32 canvas->save(); 33 matrix.setPolyToPoly(src, dst, count); 34 canvas->concat(matrix); 35 36 paint->setColor(SK_ColorGRAY); 37 paint->setStyle(SkPaint::kStroke_Style); 38 const SkScalar D = SkIntToScalar(64); 39 canvas->drawRectCoords(0, 0, D, D, *paint); 40 canvas->drawLine(0, 0, D, D, *paint); 41 canvas->drawLine(0, D, D, 0, *paint); 42 43 SkPaint::FontMetrics fm; 44 paint->getFontMetrics(&fm); 45 paint->setColor(SK_ColorRED); 46 paint->setStyle(SkPaint::kFill_Style); 47 SkScalar x = D/2; 48 float y = D/2 - (fm.fAscent + fm.fDescent)/2; 49 SkString str; 50 str.appendS32(count); 51 canvas->drawText(str.c_str(), str.size(), x, y, *paint); 52 53 canvas->restore(); 54 } 55 56 virtual void onDraw(SkCanvas* canvas) { 57 this->drawBG(canvas); 58 59 SkPaint paint; 60 paint.setAntiAlias(true); 61 paint.setStrokeWidth(SkIntToScalar(4)); 62 paint.setTextSize(SkIntToScalar(40)); 63 paint.setTextAlign(SkPaint::kCenter_Align); 64 65 canvas->save(); 66 canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); 67 // translate (1 point) 68 const int src1[] = { 0, 0 }; 69 const int dst1[] = { 5, 5 }; 70 doDraw(canvas, &paint, src1, dst1, 1); 71 canvas->restore(); 72 73 canvas->save(); 74 canvas->translate(SkIntToScalar(160), SkIntToScalar(10)); 75 // rotate/uniform-scale (2 points) 76 const int src2[] = { 32, 32, 64, 32 }; 77 const int dst2[] = { 32, 32, 64, 48 }; 78 doDraw(canvas, &paint, src2, dst2, 2); 79 canvas->restore(); 80 81 canvas->save(); 82 canvas->translate(SkIntToScalar(10), SkIntToScalar(110)); 83 // rotate/skew (3 points) 84 const int src3[] = { 0, 0, 64, 0, 0, 64 }; 85 const int dst3[] = { 0, 0, 96, 0, 24, 64 }; 86 doDraw(canvas, &paint, src3, dst3, 3); 87 canvas->restore(); 88 89 canvas->save(); 90 canvas->translate(SkIntToScalar(160), SkIntToScalar(110)); 91 // perspective (4 points) 92 const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 }; 93 const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 }; 94 doDraw(canvas, &paint, src4, dst4, 4); 95 canvas->restore(); 96 } 97 98 private: 99 typedef GM INHERITED; 100 }; 101 102 ////////////////////////////////////////////////////////////////////////////// 103 104 static GM* MyFactory(void*) { return new Poly2PolyGM; } 105 static GMRegistry reg(MyFactory); 106 107 } 108 109
