| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkColor.h" |
| #include "SkResizeImageFilter.h" |
| |
| namespace skiagm { |
| |
| class ResizeGM : public GM { |
| public: |
| ResizeGM() { |
| this->setBGColor(0x00000000); |
| } |
| |
| protected: |
| virtual SkString onShortName() { |
| return SkString("resizeimagefilter"); |
| } |
| |
| void draw(SkCanvas* canvas, |
| const SkRect& rect, |
| const SkSize& deviceSize, |
| SkPaint::FilterLevel filterLevel) { |
| SkRect dstRect; |
| canvas->getTotalMatrix().mapRect(&dstRect, rect); |
| canvas->save(); |
| SkScalar deviceScaleX = SkScalarDiv(deviceSize.width(), dstRect.width()); |
| SkScalar deviceScaleY = SkScalarDiv(deviceSize.height(), dstRect.height()); |
| canvas->translate(rect.x(), rect.y()); |
| canvas->scale(deviceScaleX, deviceScaleY); |
| canvas->translate(-rect.x(), -rect.y()); |
| SkAutoTUnref<SkImageFilter> imageFilter( |
| new SkResizeImageFilter(SkScalarInvert(deviceScaleX), |
| SkScalarInvert(deviceScaleY), |
| filterLevel)); |
| SkPaint filteredPaint; |
| filteredPaint.setImageFilter(imageFilter.get()); |
| canvas->saveLayer(&rect, &filteredPaint); |
| SkPaint paint; |
| paint.setColor(0xFF00FF00); |
| SkRect ovalRect = rect; |
| ovalRect.inset(SkIntToScalar(4), SkIntToScalar(4)); |
| canvas->drawOval(ovalRect, paint); |
| canvas->restore(); // for saveLayer |
| canvas->restore(); |
| } |
| |
| virtual SkISize onISize() { |
| return make_isize(420, 100); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| canvas->clear(0x00000000); |
| |
| SkRect srcRect = SkRect::MakeWH(96, 96); |
| |
| SkSize deviceSize = SkSize::Make(16, 16); |
| draw(canvas, |
| srcRect, |
| deviceSize, |
| SkPaint::kNone_FilterLevel); |
| |
| canvas->translate(srcRect.width() + SkIntToScalar(10), 0); |
| draw(canvas, |
| srcRect, |
| deviceSize, |
| SkPaint::kLow_FilterLevel); |
| |
| canvas->translate(srcRect.width() + SkIntToScalar(10), 0); |
| draw(canvas, |
| srcRect, |
| deviceSize, |
| SkPaint::kMedium_FilterLevel); |
| |
| canvas->translate(srcRect.width() + SkIntToScalar(10), 0); |
| draw(canvas, |
| srcRect, |
| deviceSize, |
| SkPaint::kHigh_FilterLevel); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static GM* MyFactory(void*) { return new ResizeGM; } |
| static GMRegistry reg(MyFactory); |
| |
| } |