1 2 /* 3 * Copyright 2011 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 "SampleCode.h" 9 #include "SkColorPriv.h" 10 #include "SkShader.h" 11 #include "SkView.h" 12 #include "SkCanvas.h" 13 #include "SkUtils.h" 14 15 static SkBitmap make_bitmap() { 16 SkBitmap bm; 17 const int N = 1; 18 SkColorTable* ctable = new SkColorTable(N); 19 20 SkPMColor* c = ctable->lockColors(); 21 for (int i = 0; i < N; i++) { 22 c[i] = SkPackARGB32(0x80, 0x80, 0, 0); 23 } 24 ctable->unlockColors(true); 25 bm.setConfig(SkBitmap::kIndex8_Config, 1, 1); 26 bm.allocPixels(ctable); 27 ctable->unref(); 28 29 bm.lockPixels(); 30 for (int y = 0; y < bm.height(); y++) { 31 uint8_t* p = bm.getAddr8(0, y); 32 for (int x = 0; x < bm.width(); x++) { 33 p[x] = 0; 34 } 35 } 36 bm.unlockPixels(); 37 return bm; 38 } 39 40 class TinyBitmapView : public SampleView { 41 SkBitmap fBM; 42 public: 43 TinyBitmapView() { 44 fBM = make_bitmap(); 45 this->setBGColor(0xFFDDDDDD); 46 } 47 48 protected: 49 // overrides from SkEventSink 50 virtual bool onQuery(SkEvent* evt) { 51 if (SampleCode::TitleQ(*evt)) { 52 SampleCode::TitleR(evt, "TinyBitmap"); 53 return true; 54 } 55 return this->INHERITED::onQuery(evt); 56 } 57 58 static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) { 59 SkAutoLockPixels alp(*bm); // needed for ctable 60 bm->setIsOpaque(isOpaque); 61 SkColorTable* ctable = bm->getColorTable(); 62 if (ctable) { 63 ctable->setIsOpaque(isOpaque); 64 } 65 } 66 67 virtual void onDrawContent(SkCanvas* canvas) { 68 SkShader* s = SkShader::CreateBitmapShader(fBM, SkShader::kRepeat_TileMode, 69 SkShader::kMirror_TileMode); 70 SkPaint paint; 71 paint.setShader(s)->unref(); 72 canvas->drawPaint(paint); 73 } 74 75 private: 76 typedef SkView INHERITED; 77 }; 78 79 ////////////////////////////////////////////////////////////////////////////// 80 81 static SkView* MyFactory() { return new TinyBitmapView; } 82 static SkViewRegister reg(MyFactory); 83 84
