1 /* 2 * Copyright 2014 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 10 #include "Resources.h" 11 #include "SampleCode.h" 12 #include "SkBlurMaskFilter.h" 13 #include "SkCanvas.h" 14 #include "SkColorPriv.h" 15 #include "SkImageDecoder.h" 16 #include "SkRandom.h" 17 #include "SkStream.h" 18 #include "SkTime.h" 19 20 // Intended to exercise pixel snapping observed with scaled images (and 21 // with non-scaled images, but for a different reason): Bug 1145 22 23 class IdentityScaleView : public SampleView { 24 public: 25 IdentityScaleView(const char imageFilename[]) { 26 SkString resourcePath = GetResourcePath(imageFilename); 27 SkImageDecoder* codec = NULL; 28 SkFILEStream stream(resourcePath.c_str()); 29 if (stream.isValid()) { 30 codec = SkImageDecoder::Factory(&stream); 31 } 32 if (codec) { 33 stream.rewind(); 34 codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode); 35 SkDELETE(codec); 36 } else { 37 fBM.allocN32Pixels(1, 1); 38 *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad 39 } 40 } 41 42 protected: 43 SkBitmap fBM; 44 45 // overrides from SkEventSink 46 virtual bool onQuery(SkEvent* evt) SK_OVERRIDE { 47 if (SampleCode::TitleQ(*evt)) { 48 SampleCode::TitleR(evt, "IdentityScale"); 49 return true; 50 } 51 return this->INHERITED::onQuery(evt); 52 } 53 54 virtual void onDrawContent(SkCanvas* canvas) SK_OVERRIDE { 55 56 SkPaint paint; 57 58 paint.setAntiAlias(true); 59 paint.setTextSize(48); 60 paint.setFilterLevel(SkPaint::kHigh_FilterLevel); 61 62 SkTime::DateTime time; 63 SkTime::GetDateTime(&time); 64 65 bool use_scale = (time.fSecond % 2 == 1); 66 const char *text; 67 68 canvas->save(); 69 if (use_scale) { 70 text = "Scaled = 1"; 71 } else { 72 73 SkRect r = { 100, 100, 356, 356 }; 74 SkPath clipPath; 75 clipPath.addRoundRect(r, SkIntToScalar(5), SkIntToScalar(5)); 76 canvas->clipPath(clipPath, SkRegion::kIntersect_Op, SkToBool(1)); 77 text = "Scaled = 0"; 78 } 79 canvas->drawBitmap( fBM, 100, 100, &paint ); 80 canvas->restore(); 81 canvas->drawText( text, strlen(text), 100, 400, paint ); 82 this->inval(NULL); 83 } 84 85 private: 86 typedef SampleView INHERITED; 87 }; 88 89 ////////////////////////////////////////////////////////////////////////////// 90 91 static SkView* MyFactory() { return new IdentityScaleView("mandrill_256.png"); } 92 static SkViewRegister reg(MyFactory); 93