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 #include "gm/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkColor.h" 11 #include "include/core/SkFont.h" 12 #include "include/core/SkFontMetrics.h" 13 #include "include/core/SkFontTypes.h" 14 #include "include/core/SkMatrix.h" 15 #include "include/core/SkPaint.h" 16 #include "include/core/SkPoint.h" 17 #include "include/core/SkRect.h" 18 #include "include/core/SkRefCnt.h" 19 #include "include/core/SkScalar.h" 20 #include "include/core/SkSize.h" 21 #include "include/core/SkString.h" 22 #include "include/core/SkTypeface.h" 23 #include "include/utils/SkTextUtils.h" 24 #include "tools/Resources.h" 25 26 #include <stdint.h> 27 28 class Poly2PolyGM : public skiagm::GM { 29 public: Poly2PolyGM()30 Poly2PolyGM() {} 31 32 protected: 33 onShortName()34 SkString onShortName() override { 35 return SkString("poly2poly"); 36 } 37 onISize()38 SkISize onISize() override { 39 return SkISize::Make(835, 840); 40 } 41 doDraw(SkCanvas * canvas,const SkFont & font,SkPaint * paint,const int isrc[],const int idst[],int count)42 static void doDraw(SkCanvas* canvas, const SkFont& font, SkPaint* paint, const int isrc[], 43 const int idst[], int count) { 44 SkMatrix matrix; 45 SkPoint src[4], dst[4]; 46 47 for (int i = 0; i < count; i++) { 48 src[i].set(SkIntToScalar(isrc[2*i+0]), SkIntToScalar(isrc[2*i+1])); 49 dst[i].set(SkIntToScalar(idst[2*i+0]), SkIntToScalar(idst[2*i+1])); 50 } 51 52 canvas->save(); 53 matrix.setPolyToPoly(src, dst, count); 54 canvas->concat(matrix); 55 56 paint->setColor(SK_ColorGRAY); 57 paint->setStyle(SkPaint::kStroke_Style); 58 const SkScalar D = 64; 59 canvas->drawRect(SkRect::MakeWH(D, D), *paint); 60 canvas->drawLine(0, 0, D, D, *paint); 61 canvas->drawLine(0, D, D, 0, *paint); 62 63 SkFontMetrics fm; 64 font.getMetrics(&fm); 65 paint->setColor(SK_ColorRED); 66 paint->setStyle(SkPaint::kFill_Style); 67 SkScalar x = D/2; 68 SkScalar y = D/2 - (fm.fAscent + fm.fDescent)/2; 69 uint16_t glyphID = 3; // X 70 SkTextUtils::Draw(canvas, &glyphID, sizeof(glyphID), SkTextEncoding::kGlyphID, x, y, 71 font, *paint, SkTextUtils::kCenter_Align); 72 canvas->restore(); 73 } 74 onOnceBeforeDraw()75 void onOnceBeforeDraw() override { 76 fEmFace = MakeResourceAsTypeface("fonts/Em.ttf"); 77 } 78 onDraw(SkCanvas * canvas)79 void onDraw(SkCanvas* canvas) override { 80 SkPaint paint; 81 paint.setAntiAlias(true); 82 paint.setStrokeWidth(SkIntToScalar(4)); 83 SkFont font(fEmFace, 40); 84 85 canvas->save(); 86 canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); 87 // translate (1 point) 88 const int src1[] = { 0, 0 }; 89 const int dst1[] = { 5, 5 }; 90 doDraw(canvas, font, &paint, src1, dst1, 1); 91 canvas->restore(); 92 93 canvas->save(); 94 canvas->translate(SkIntToScalar(160), SkIntToScalar(10)); 95 // rotate/uniform-scale (2 points) 96 const int src2[] = { 32, 32, 64, 32 }; 97 const int dst2[] = { 32, 32, 64, 48 }; 98 doDraw(canvas, font, &paint, src2, dst2, 2); 99 canvas->restore(); 100 101 canvas->save(); 102 canvas->translate(SkIntToScalar(10), SkIntToScalar(110)); 103 // rotate/skew (3 points) 104 const int src3[] = { 0, 0, 64, 0, 0, 64 }; 105 const int dst3[] = { 0, 0, 96, 0, 24, 64 }; 106 doDraw(canvas, font, &paint, src3, dst3, 3); 107 canvas->restore(); 108 109 canvas->save(); 110 canvas->translate(SkIntToScalar(160), SkIntToScalar(110)); 111 // perspective (4 points) 112 const int src4[] = { 0, 0, 64, 0, 64, 64, 0, 64 }; 113 const int dst4[] = { 0, 0, 96, 0, 64, 96, 0, 64 }; 114 doDraw(canvas, font, &paint, src4, dst4, 4); 115 canvas->restore(); 116 } 117 118 private: 119 using INHERITED = skiagm::GM; 120 sk_sp<SkTypeface> fEmFace; 121 }; 122 123 ////////////////////////////////////////////////////////////////////////////// 124 125 DEF_GM( return new Poly2PolyGM; ) 126