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 "SkView.h" 10#include "SkCanvas.h" 11#include "SkGradientShader.h" 12#include "SkGraphics.h" 13#include "SkImageDecoder.h" 14#include "SkPath.h" 15#include "SkRegion.h" 16#include "SkShader.h" 17#include "SkUtils.h" 18#include "SkXfermode.h" 19#include "SkColorPriv.h" 20#include "SkColorFilter.h" 21#include "SkTime.h" 22 23static const char* gNames[] = { 24 "/skimages/background_01.png" 25}; 26 27class Filter2View : public SampleView { 28public: 29 SkBitmap* fBitmaps; 30 int fBitmapCount; 31 int fCurrIndex; 32 33 Filter2View() { 34 fBitmapCount = SK_ARRAY_COUNT(gNames)*2; 35 fBitmaps = new SkBitmap[fBitmapCount]; 36 37 for (int i = 0; i < fBitmapCount/2; i++) { 38 SkImageDecoder::DecodeFile(gNames[i], &fBitmaps[i], 39 SkBitmap::kARGB_8888_Config, 40 SkImageDecoder::kDecodePixels_Mode, NULL); 41 } 42 for (int i = fBitmapCount/2; i < fBitmapCount; i++) { 43 SkImageDecoder::DecodeFile(gNames[i-fBitmapCount/2], &fBitmaps[i], 44 SkBitmap::kRGB_565_Config, 45 SkImageDecoder::kDecodePixels_Mode, NULL); 46 } 47 fCurrIndex = 0; 48 49 this->setBGColor(SK_ColorGRAY); 50 } 51 52 virtual ~Filter2View() { 53 delete[] fBitmaps; 54 } 55 56protected: 57 // overrides from SkEventSink 58 virtual bool onQuery(SkEvent* evt) { 59 if (SampleCode::TitleQ(*evt)) { 60 SkString str("Filter/Dither "); 61 str.append(gNames[fCurrIndex]); 62 SampleCode::TitleR(evt, str.c_str()); 63 return true; 64 } 65 return this->INHERITED::onQuery(evt); 66 } 67 68 virtual void onDrawContent(SkCanvas* canvas) { 69 canvas->translate(SkIntToScalar(10), SkIntToScalar(50)); 70 71 const SkScalar W = SkIntToScalar(fBitmaps[0].width() + 1); 72 const SkScalar H = SkIntToScalar(fBitmaps[0].height() + 1); 73 SkPaint paint; 74 75 const SkScalar scale = SkFloatToScalar(0.897917f); 76 canvas->scale(SK_Scalar1, scale); 77 78 for (int k = 0; k < 2; k++) { 79 paint.setFilterBitmap(k == 1); 80 for (int j = 0; j < 2; j++) { 81 paint.setDither(j == 1); 82 for (int i = 0; i < fBitmapCount; i++) { 83 SkScalar x = (k * fBitmapCount + j) * W; 84 SkScalar y = i * H; 85 x = SkIntToScalar(SkScalarRound(x)); 86 y = SkIntToScalar(SkScalarRound(y)); 87 canvas->drawBitmap(fBitmaps[i], x, y, &paint); 88 if (i == 0) { 89 SkPaint p; 90 p.setAntiAlias(true); 91 p.setTextAlign(SkPaint::kCenter_Align); 92 p.setTextSize(SkIntToScalar(18)); 93 SkString s("dither="); 94 s.appendS32(paint.isDither()); 95 s.append(" filter="); 96 s.appendS32(paint.isFilterBitmap()); 97 canvas->drawText(s.c_str(), s.size(), x + W/2, 98 y - p.getTextSize(), p); 99 } 100 if (k+j == 2) { 101 SkPaint p; 102 p.setAntiAlias(true); 103 p.setTextSize(SkIntToScalar(18)); 104 SkString s; 105 s.append(" depth="); 106 s.appendS32(fBitmaps[i].config() == SkBitmap::kRGB_565_Config ? 16 : 32); 107 canvas->drawText(s.c_str(), s.size(), x + W + SkIntToScalar(4), 108 y + H/2, p); 109 } 110 } 111 } 112 } 113 } 114 115private: 116 typedef SampleView INHERITED; 117}; 118 119////////////////////////////////////////////////////////////////////////////// 120 121static SkView* MyFactory() { return new Filter2View; } 122static SkViewRegister reg(MyFactory); 123 124