1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "gm.h" 9 10 #include "SkColorPriv.h" 11 #include "SkShader.h" 12 13 namespace skiagm { 14 15 class BigMatrixGM : public GM { 16 public: 17 BigMatrixGM() { 18 this->setBGColor(0xFF66AA99); 19 } 20 21 protected: 22 virtual SkString onShortName() { 23 return SkString("bigmatrix"); 24 } 25 26 virtual SkISize onISize() { 27 return SkISize::Make(50, 50); 28 } 29 30 virtual void onDraw(SkCanvas* canvas) { 31 SkMatrix m; 32 m.reset(); 33 m.setRotate(33 * SK_Scalar1); 34 m.postScale(3000 * SK_Scalar1, 3000 * SK_Scalar1); 35 m.postTranslate(6000 * SK_Scalar1, -5000 * SK_Scalar1); 36 canvas->concat(m); 37 38 SkPaint paint; 39 paint.setColor(SK_ColorRED); 40 paint.setAntiAlias(true); 41 42 bool success = m.invert(&m); 43 SkASSERT(success); 44 (void) success; // silence compiler :( 45 46 SkPath path; 47 48 SkPoint pt = {10 * SK_Scalar1, 10 * SK_Scalar1}; 49 SkScalar small = 1 / (500 * SK_Scalar1); 50 51 m.mapPoints(&pt, 1); 52 path.addCircle(pt.fX, pt.fY, small); 53 canvas->drawPath(path, paint); 54 55 pt.set(30 * SK_Scalar1, 10 * SK_Scalar1); 56 m.mapPoints(&pt, 1); 57 SkRect rect = {pt.fX - small, pt.fY - small, 58 pt.fX + small, pt.fY + small}; 59 canvas->drawRect(rect, paint); 60 61 SkBitmap bmp; 62 bmp.allocN32Pixels(2, 2); 63 uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp.getPixels()); 64 pixels[0] = SkPackARGB32(0xFF, 0xFF, 0x00, 0x00); 65 pixels[1] = SkPackARGB32(0xFF, 0x00, 0xFF, 0x00); 66 pixels[2] = SkPackARGB32(0x80, 0x00, 0x00, 0x00); 67 pixels[3] = SkPackARGB32(0xFF, 0x00, 0x00, 0xFF); 68 pt.set(30 * SK_Scalar1, 30 * SK_Scalar1); 69 m.mapPoints(&pt, 1); 70 SkMatrix s; 71 s.reset(); 72 s.setScale(SK_Scalar1 / 1000, SK_Scalar1 / 1000); 73 SkShader* shader = SkShader::CreateBitmapShader( 74 bmp, 75 SkShader::kRepeat_TileMode, 76 SkShader::kRepeat_TileMode, 77 &s); 78 paint.setShader(shader)->unref(); 79 paint.setAntiAlias(false); 80 paint.setFilterLevel(SkPaint::kLow_FilterLevel); 81 rect.setLTRB(pt.fX - small, pt.fY - small, 82 pt.fX + small, pt.fY + small); 83 canvas->drawRect(rect, paint); 84 } 85 86 private: 87 typedef GM INHERITED; 88 }; 89 90 ////////////////////////////////////////////////////////////////////////////// 91 92 static GM* MyFactory(void*) { return new BigMatrixGM; } 93 static GMRegistry reg(MyFactory); 94 95 } 96
