| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "DecodeFile.h" |
| #include "gm.h" |
| |
| #include "Resources.h" |
| #include "SampleCode.h" |
| #include "SkBlurMaskFilter.h" |
| #include "SkCanvas.h" |
| #include "SkColorPriv.h" |
| #include "SkRandom.h" |
| #include "SkStream.h" |
| |
| // Intended to exercise pixel snapping observed with scaled images (and |
| // with non-scaled images, but for a different reason): Bug 1145 |
| |
| class SubpixelTranslateView : public SampleView { |
| public: |
| SubpixelTranslateView(const char imageFilename[], |
| float horizontalVelocity, |
| float verticalVelocity) |
| : fHorizontalVelocity(horizontalVelocity), |
| fVerticalVelocity(verticalVelocity) { |
| SkString resourcePath = GetResourcePath(imageFilename); |
| if (!decode_file(resourcePath.c_str(), &fBM)) { |
| fBM.allocN32Pixels(1, 1); |
| *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad |
| } |
| fCurPos = SkPoint::Make(0,0); |
| fSize = 200; |
| } |
| |
| protected: |
| SkBitmap fBM; |
| SkScalar fSize; |
| float fHorizontalVelocity, fVerticalVelocity; |
| |
| SkPoint fCurPos; |
| |
| // overrides from SkEventSink |
| bool onQuery(SkEvent* evt) override { |
| if (SampleCode::TitleQ(*evt)) { |
| SampleCode::TitleR(evt, "SubpixelTranslate"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| void onDrawContent(SkCanvas* canvas) override { |
| |
| static const SkFilterQuality gQualitys[] = { |
| kNone_SkFilterQuality, |
| kLow_SkFilterQuality, |
| kMedium_SkFilterQuality, |
| kHigh_SkFilterQuality |
| }; |
| |
| SkPaint paint; |
| paint.setTextSize(48); |
| paint.setSubpixelText(true); |
| |
| paint.setAntiAlias(true); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) { |
| paint.setFilterQuality(gQualitys[i]); |
| SkRect r = SkRect::MakeXYWH( fCurPos.fX + i * (fSize + 10), fCurPos.fY, fSize, fSize ); |
| canvas->drawBitmapRect( fBM, r, &paint ); |
| } |
| |
| canvas->drawString( "AA Scaled", fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fSize + 10), fCurPos.fY + fSize/2, paint ); |
| |
| paint.setAntiAlias(false); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) { |
| paint.setFilterQuality(gQualitys[i]); |
| SkRect r = SkRect::MakeXYWH( fCurPos.fX + i * (fSize + 10), fCurPos.fY + fSize + 10, fSize, fSize ); |
| canvas->drawBitmapRect( fBM, r, &paint ); |
| } |
| canvas->drawString( "Scaled", fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fSize + 10), fCurPos.fY + fSize + 10 + fSize/2, paint ); |
| |
| paint.setAntiAlias(true); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) { |
| paint.setFilterQuality(gQualitys[i]); |
| canvas->drawBitmap( fBM, fCurPos.fX + i * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10), &paint ); |
| } |
| |
| canvas->drawString( "AA No Scale", fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10) + fSize/2, paint ); |
| |
| paint.setAntiAlias(false); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) { |
| paint.setFilterQuality(gQualitys[i]); |
| canvas->drawBitmap( fBM, fCurPos.fX + i * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10) + fBM.height() + 10, &paint ); |
| } |
| |
| canvas->drawString( "No Scale", fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10) + fBM.height() + 10 + fSize/2, paint ); |
| |
| |
| fCurPos.fX += fHorizontalVelocity; |
| fCurPos.fY += fVerticalVelocity; |
| } |
| |
| private: |
| typedef SampleView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new SubpixelTranslateView("images/mandrill_256.png", .05f, .05f); } |
| static SkViewRegister reg(MyFactory); |