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 "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 nullptr, 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 bool onQuery(SkEvent* evt) override { 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->setAlphaType(isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType); 61 } 62 63 void onDrawContent(SkCanvas* canvas) override { 64 SkPaint paint; 65 paint.setShader(SkShader::MakeBitmapShader(fBM, SkShader::kRepeat_TileMode, 66 SkShader::kMirror_TileMode)); 67 canvas->drawPaint(paint); 68 } 69 70 private: 71 typedef SkView INHERITED; 72 }; 73 74 ////////////////////////////////////////////////////////////////////////////// 75 76 static SkView* MyFactory() { return new TinyBitmapView; } 77 static SkViewRegister reg(MyFactory); 78
