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.h" 9 #include "SkCanvas.h" 10 #include "SkColorPriv.h" 11 #include "SkPath.h" 12 #include "SkShader.h" 13 14 static void test4(SkCanvas* canvas) { 15 SkPaint paint; 16 paint.setAntiAlias(true); 17 SkPoint pts[] = { 18 {10, 160}, {610, 160}, 19 {610, 160}, {10, 160}, 20 21 {610, 160}, {610, 160}, 22 {610, 199}, {610, 199}, 23 24 {10, 198}, {610, 198}, 25 {610, 199}, {10, 199}, 26 27 {10, 160}, {10, 160}, 28 {10, 199}, {10, 199} 29 }; 30 char verbs[] = { 31 0, 1, 1, 1, 4, 32 0, 1, 1, 1, 4, 33 0, 1, 1, 1, 4, 34 0, 1, 1, 1, 4 35 }; 36 SkPath path; 37 SkPoint* ptPtr = pts; 38 for (size_t i = 0; i < sizeof(verbs); ++i) { 39 switch ((SkPath::Verb) verbs[i]) { 40 case SkPath::kMove_Verb: 41 path.moveTo(ptPtr->fX, ptPtr->fY); 42 ++ptPtr; 43 break; 44 case SkPath::kLine_Verb: 45 path.lineTo(ptPtr->fX, ptPtr->fY); 46 ++ptPtr; 47 break; 48 case SkPath::kClose_Verb: 49 path.close(); 50 break; 51 default: 52 SkASSERT(false); 53 break; 54 } 55 } 56 SkRect clip = {0, 130, 772, 531}; 57 canvas->clipRect(clip); 58 canvas->drawPath(path, paint); 59 } 60 61 constexpr SkBlendMode gModes[] = { 62 SkBlendMode::kClear, 63 SkBlendMode::kSrc, 64 SkBlendMode::kDst, 65 SkBlendMode::kSrcOver, 66 SkBlendMode::kDstOver, 67 SkBlendMode::kSrcIn, 68 SkBlendMode::kDstIn, 69 SkBlendMode::kSrcOut, 70 SkBlendMode::kDstOut, 71 SkBlendMode::kSrcATop, 72 SkBlendMode::kDstATop, 73 SkBlendMode::kXor, 74 }; 75 76 const int gWidth = 64; 77 const int gHeight = 64; 78 const SkScalar W = SkIntToScalar(gWidth); 79 const SkScalar H = SkIntToScalar(gHeight); 80 81 static SkScalar drawCell(SkCanvas* canvas, SkBlendMode mode, SkAlpha a0, SkAlpha a1) { 82 83 SkPaint paint; 84 paint.setAntiAlias(true); 85 86 SkRect r = SkRect::MakeWH(W, H); 87 r.inset(W/10, H/10); 88 89 paint.setColor(SK_ColorBLUE); 90 paint.setAlpha(a0); 91 canvas->drawOval(r, paint); 92 93 paint.setColor(SK_ColorRED); 94 paint.setAlpha(a1); 95 paint.setBlendMode(mode); 96 97 SkScalar offset = SK_Scalar1 / 3; 98 SkRect rect = SkRect::MakeXYWH(W / 4 + offset, 99 H / 4 + offset, 100 W / 2, H / 2); 101 canvas->drawRect(rect, paint); 102 103 return H; 104 } 105 106 static sk_sp<SkShader> make_bg_shader() { 107 SkBitmap bm; 108 bm.allocN32Pixels(2, 2); 109 *bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF; 110 *bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCE, 111 0xCF, 0xCE); 112 113 const SkMatrix m = SkMatrix::MakeScale(SkIntToScalar(6), SkIntToScalar(6)); 114 return SkShader::MakeBitmapShader(bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, 115 &m); 116 } 117 118 namespace skiagm { 119 120 class AARectModesGM : public GM { 121 SkPaint fBGPaint; 122 public: 123 AARectModesGM () { 124 fBGPaint.setShader(make_bg_shader()); 125 } 126 127 protected: 128 129 SkString onShortName() override { 130 return SkString("aarectmodes"); 131 } 132 133 SkISize onISize() override { return SkISize::Make(640, 480); } 134 135 void onDraw(SkCanvas* canvas) override { 136 if (false) { // avoid bit rot, suppress warning 137 test4(canvas); 138 } 139 const SkRect bounds = SkRect::MakeWH(W, H); 140 constexpr SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 }; 141 142 canvas->translate(SkIntToScalar(4), SkIntToScalar(4)); 143 144 for (int alpha = 0; alpha < 4; ++alpha) { 145 canvas->save(); 146 canvas->save(); 147 for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) { 148 if (6 == i) { 149 canvas->restore(); 150 canvas->translate(W * 5, 0); 151 canvas->save(); 152 } 153 canvas->drawRect(bounds, fBGPaint); 154 canvas->saveLayer(&bounds, nullptr); 155 SkScalar dy = drawCell(canvas, gModes[i], 156 gAlphaValue[alpha & 1], 157 gAlphaValue[alpha & 2]); 158 canvas->restore(); 159 160 canvas->translate(0, dy * 5 / 4); 161 } 162 canvas->restore(); 163 canvas->restore(); 164 canvas->translate(W * 5 / 4, 0); 165 } 166 } 167 168 private: 169 typedef GM INHERITED; 170 }; 171 172 ////////////////////////////////////////////////////////////////////////////// 173 174 static GM* MyFactory(void*) { return new AARectModesGM; } 175 static GMRegistry reg(MyFactory); 176 177 } 178
