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 const int N = 1; 17 18 SkPMColor c[N]; 19 for (int i = 0; i < N; i++) { 20 c[i] = SkPackARGB32(0x80, 0x80, 0, 0); 21 } 22 SkColorTable* ctable = new SkColorTable(c, N); 23 24 SkBitmap bm; 25 bm.allocPixels(SkImageInfo::Make(1, 1, kIndex_8_SkColorType, 26 kPremul_SkAlphaType), 27 NULL, ctable); 28 ctable->unref(); 29 30 bm.lockPixels(); 31 for (int y = 0; y < bm.height(); y++) { 32 uint8_t* p = bm.getAddr8(0, y); 33 for (int x = 0; x < bm.width(); x++) { 34 p[x] = 0; 35 } 36 } 37 bm.unlockPixels(); 38 return bm; 39 } 40 41 class TinyBitmapView : public SampleView { 42 SkBitmap fBM; 43 public: 44 TinyBitmapView() { 45 fBM = make_bitmap(); 46 this->setBGColor(0xFFDDDDDD); 47 } 48 49 protected: 50 // overrides from SkEventSink 51 virtual bool onQuery(SkEvent* evt) { 52 if (SampleCode::TitleQ(*evt)) { 53 SampleCode::TitleR(evt, "TinyBitmap"); 54 return true; 55 } 56 return this->INHERITED::onQuery(evt); 57 } 58 59 static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) { 60 SkAutoLockPixels alp(*bm); // needed for ctable 61 bm->setAlphaType(isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType); 62 } 63 64 virtual void onDrawContent(SkCanvas* canvas) { 65 SkShader* s = SkShader::CreateBitmapShader(fBM, SkShader::kRepeat_TileMode, 66 SkShader::kMirror_TileMode); 67 SkPaint paint; 68 paint.setShader(s)->unref(); 69 canvas->drawPaint(paint); 70 } 71 72 private: 73 typedef SkView INHERITED; 74 }; 75 76 ////////////////////////////////////////////////////////////////////////////// 77 78 static SkView* MyFactory() { return new TinyBitmapView; } 79 static SkViewRegister reg(MyFactory); 80
