OLD | NEW |
(Empty) | |
| 1 |
| 2 /* |
| 3 * Copyright 2014 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 |
| 9 #include "gm.h" |
| 10 #include "SampleCode.h" |
| 11 #include "SkBlurMaskFilter.h" |
| 12 #include "SkColorPriv.h" |
| 13 #include "SkCanvas.h" |
| 14 #include "SkImageDecoder.h" |
| 15 #include "SkRandom.h" |
| 16 #include "SkStream.h" |
| 17 |
| 18 // Intended to exercise pixel snapping observed with scaled images (and |
| 19 // with non-scaled images, but for a different reason): Bug 1145 |
| 20 |
| 21 class SubpixelTranslateView : public SampleView { |
| 22 public: |
| 23 SubpixelTranslateView(const char imageFilename[], |
| 24 float horizontalVelocity, |
| 25 float verticalVelocity) |
| 26 : fFilename(imageFilename), |
| 27 fHorizontalVelocity(horizontalVelocity), |
| 28 fVerticalVelocity(verticalVelocity) { |
| 29 SkString path(skiagm::GM::GetResourcePath()); |
| 30 path.append("/"); |
| 31 path.append(fFilename); |
| 32 |
| 33 SkImageDecoder *codec = NULL; |
| 34 SkFILEStream stream(path.c_str()); |
| 35 if (stream.isValid()) { |
| 36 codec = SkImageDecoder::Factory(&stream); |
| 37 } |
| 38 if (codec) { |
| 39 stream.rewind(); |
| 40 codec->decode(&stream, &fBM, SkBitmap::kARGB_8888_Config, |
| 41 SkImageDecoder::kDecodePixels_Mode); |
| 42 SkDELETE(codec); |
| 43 } else { |
| 44 fBM.allocN32Pixels(1, 1); |
| 45 *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad |
| 46 } |
| 47 fCurPos = SkPoint::Make(0,0); |
| 48 fSize = 200; |
| 49 } |
| 50 |
| 51 protected: |
| 52 SkBitmap fBM; |
| 53 SkString fFilename; |
| 54 int fSize; |
| 55 float fHorizontalVelocity, fVerticalVelocity; |
| 56 |
| 57 SkPoint fCurPos; |
| 58 |
| 59 // overrides from SkEventSink |
| 60 virtual bool onQuery(SkEvent* evt) SK_OVERRIDE { |
| 61 if (SampleCode::TitleQ(*evt)) { |
| 62 SampleCode::TitleR(evt, "SubpixelTranslate"); |
| 63 return true; |
| 64 } |
| 65 return this->INHERITED::onQuery(evt); |
| 66 } |
| 67 |
| 68 virtual void onDrawContent(SkCanvas* canvas) SK_OVERRIDE { |
| 69 |
| 70 static const SkPaint::FilterLevel gLevels[] = { |
| 71 SkPaint::kNone_FilterLevel, |
| 72 SkPaint::kLow_FilterLevel, |
| 73 SkPaint::kMedium_FilterLevel, |
| 74 SkPaint::kHigh_FilterLevel |
| 75 }; |
| 76 |
| 77 SkPaint paint; |
| 78 paint.setTextSize(48); |
| 79 |
| 80 paint.setAntiAlias(true); |
| 81 for (size_t i = 0; i < SK_ARRAY_COUNT(gLevels); ++i) { |
| 82 paint.setFilterLevel(gLevels[i]); |
| 83 SkRect r = SkRect::MakeXYWH( fCurPos.fX + i * (fSize + 10), fCurPos.
fY, fSize, fSize ); |
| 84 canvas->drawBitmapRect( fBM, r, &paint ); |
| 85 } |
| 86 |
| 87 canvas->drawText( "AA Scaled", strlen("AA Scaled"), fCurPos.fX + SK_ARRA
Y_COUNT(gLevels) * (fSize + 10), fCurPos.fY + fSize/2, paint ); |
| 88 |
| 89 paint.setAntiAlias(false); |
| 90 for (size_t i = 0; i < SK_ARRAY_COUNT(gLevels); ++i) { |
| 91 paint.setFilterLevel(gLevels[i]); |
| 92 SkRect r = SkRect::MakeXYWH( fCurPos.fX + i * (fSize + 10), fCurPos.
fY + fSize + 10, fSize, fSize ); |
| 93 canvas->drawBitmapRect( fBM, r, &paint ); |
| 94 } |
| 95 canvas->drawText( "Scaled", strlen("Scaled"), fCurPos.fX + SK_ARRAY_COUN
T(gLevels) * (fSize + 10), fCurPos.fY + fSize + 10 + fSize/2, paint ); |
| 96 |
| 97 paint.setAntiAlias(true); |
| 98 for (size_t i = 0; i < SK_ARRAY_COUNT(gLevels); ++i) { |
| 99 paint.setFilterLevel(gLevels[i]); |
| 100 canvas->drawBitmap( fBM, fCurPos.fX + i * (fBM.width() + 10), fCurPo
s.fY + 2*(fSize + 10), &paint ); |
| 101 } |
| 102 |
| 103 canvas->drawText( "AA No Scale", strlen("AA No Scale"), fCurPos.fX + SK_
ARRAY_COUNT(gLevels) * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10) + fSize/2
, paint ); |
| 104 |
| 105 paint.setAntiAlias(false); |
| 106 for (size_t i = 0; i < SK_ARRAY_COUNT(gLevels); ++i) { |
| 107 paint.setFilterLevel(gLevels[i]); |
| 108 canvas->drawBitmap( fBM, fCurPos.fX + i * (fBM.width() + 10), fCurPo
s.fY + 2*(fSize + 10) + fBM.height() + 10, &paint ); |
| 109 } |
| 110 |
| 111 canvas->drawText( "No Scale", strlen("No Scale"), fCurPos.fX + SK_ARRAY_
COUNT(gLevels) * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10) + fBM.height()
+ 10 + fSize/2, paint ); |
| 112 |
| 113 |
| 114 fCurPos.fX += fHorizontalVelocity; |
| 115 fCurPos.fY += fVerticalVelocity; |
| 116 this->inval(NULL); |
| 117 } |
| 118 |
| 119 private: |
| 120 typedef SampleView INHERITED; |
| 121 }; |
| 122 |
| 123 ////////////////////////////////////////////////////////////////////////////// |
| 124 |
| 125 static SkView* MyFactory() { return new SubpixelTranslateView("mandrill_256.png"
, .05, .05); } |
| 126 static SkViewRegister reg(MyFactory); |
OLD | NEW |