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 "SkShader.h" 12 13 static void test4(SkCanvas* canvas) { 14 SkPaint paint; 15 paint.setAntiAlias(true); 16 SkPoint pts[] = { 17 {10, 160}, {610, 160}, 18 {610, 160}, {10, 160}, 19 20 {610, 160}, {610, 160}, 21 {610, 199}, {610, 199}, 22 23 {10, 198}, {610, 198}, 24 {610, 199}, {10, 199}, 25 26 {10, 160}, {10, 160}, 27 {10, 199}, {10, 199} 28 }; 29 char verbs[] = { 30 0, 1, 1, 1, 4, 31 0, 1, 1, 1, 4, 32 0, 1, 1, 1, 4, 33 0, 1, 1, 1, 4 34 }; 35 SkPath path; 36 SkPoint* ptPtr = pts; 37 for (size_t i = 0; i < sizeof(verbs); ++i) { 38 switch ((SkPath::Verb) verbs[i]) { 39 case SkPath::kMove_Verb: 40 path.moveTo(ptPtr->fX, ptPtr->fY); 41 ++ptPtr; 42 break; 43 case SkPath::kLine_Verb: 44 path.lineTo(ptPtr->fX, ptPtr->fY); 45 ++ptPtr; 46 break; 47 case SkPath::kClose_Verb: 48 path.close(); 49 break; 50 default: 51 SkASSERT(false); 52 break; 53 } 54 } 55 SkRect clip = {0, 130, 772, 531}; 56 canvas->clipRect(clip); 57 canvas->drawPath(path, paint); 58 } 59 60 static const struct { 61 SkXfermode::Mode fMode; 62 const char* fLabel; 63 } gModes[] = { 64 { SkXfermode::kClear_Mode, "Clear" }, 65 { SkXfermode::kSrc_Mode, "Src" }, 66 { SkXfermode::kDst_Mode, "Dst" }, 67 { SkXfermode::kSrcOver_Mode, "SrcOver" }, 68 { SkXfermode::kDstOver_Mode, "DstOver" }, 69 { SkXfermode::kSrcIn_Mode, "SrcIn" }, 70 { SkXfermode::kDstIn_Mode, "DstIn" }, 71 { SkXfermode::kSrcOut_Mode, "SrcOut" }, 72 { SkXfermode::kDstOut_Mode, "DstOut" }, 73 { SkXfermode::kSrcATop_Mode, "SrcATop" }, 74 { SkXfermode::kDstATop_Mode, "DstATop" }, 75 { SkXfermode::kXor_Mode, "Xor" }, 76 }; 77 78 const int gWidth = 64; 79 const int gHeight = 64; 80 const SkScalar W = SkIntToScalar(gWidth); 81 const SkScalar H = SkIntToScalar(gHeight); 82 83 static SkScalar drawCell(SkCanvas* canvas, SkXfermode* mode, 84 SkAlpha a0, SkAlpha a1) { 85 86 SkPaint paint; 87 paint.setAntiAlias(true); 88 89 SkRect r = SkRect::MakeWH(W, H); 90 r.inset(W/10, H/10); 91 92 paint.setColor(SK_ColorBLUE); 93 paint.setAlpha(a0); 94 canvas->drawOval(r, paint); 95 96 paint.setColor(SK_ColorRED); 97 paint.setAlpha(a1); 98 paint.setXfermode(mode); 99 100 SkScalar offset = SK_Scalar1 / 3; 101 SkRect rect = SkRect::MakeXYWH(W / 4 + offset, 102 H / 4 + offset, 103 W / 2, H / 2); 104 canvas->drawRect(rect, paint); 105 106 return H; 107 } 108 109 static SkShader* make_bg_shader() { 110 SkBitmap bm; 111 bm.allocN32Pixels(2, 2); 112 *bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF; 113 *bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCC, 114 0xCC, 0xCC); 115 116 SkMatrix m; 117 m.setScale(SkIntToScalar(6), SkIntToScalar(6)); 118 SkShader* s = SkShader::CreateBitmapShader(bm, 119 SkShader::kRepeat_TileMode, 120 SkShader::kRepeat_TileMode, 121 &m); 122 123 return s; 124 } 125 126 namespace skiagm { 127 128 class AARectModesGM : public GM { 129 SkPaint fBGPaint; 130 public: 131 AARectModesGM () { 132 fBGPaint.setShader(make_bg_shader())->unref(); 133 } 134 135 protected: 136 virtual uint32_t onGetFlags() const SK_OVERRIDE { 137 return kSkipTiled_Flag; 138 } 139 140 virtual SkString onShortName() { 141 return SkString("aarectmodes"); 142 } 143 144 virtual SkISize onISize() { return SkISize::Make(640, 480); } 145 146 virtual void onDraw(SkCanvas* canvas) { 147 if (false) { // avoid bit rot, suppress warning 148 test4(canvas); 149 } 150 const SkRect bounds = SkRect::MakeWH(W, H); 151 static const SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 }; 152 153 canvas->translate(SkIntToScalar(4), SkIntToScalar(4)); 154 155 for (int alpha = 0; alpha < 4; ++alpha) { 156 canvas->save(); 157 canvas->save(); 158 for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) { 159 if (6 == i) { 160 canvas->restore(); 161 canvas->translate(W * 5, 0); 162 canvas->save(); 163 } 164 SkXfermode* mode = SkXfermode::Create(gModes[i].fMode); 165 166 canvas->drawRect(bounds, fBGPaint); 167 canvas->saveLayer(&bounds, NULL); 168 SkScalar dy = drawCell(canvas, mode, 169 gAlphaValue[alpha & 1], 170 gAlphaValue[alpha & 2]); 171 canvas->restore(); 172 173 canvas->translate(0, dy * 5 / 4); 174 SkSafeUnref(mode); 175 } 176 canvas->restore(); 177 canvas->restore(); 178 canvas->translate(W * 5 / 4, 0); 179 } 180 } 181 182 private: 183 typedef GM INHERITED; 184 }; 185 186 ////////////////////////////////////////////////////////////////////////////// 187 188 static GM* MyFactory(void*) { return new AARectModesGM; } 189 static GMRegistry reg(MyFactory); 190 191 } 192
