| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorPriv.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPixmap.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "src/core/SkMipmap.h" |
| #include "src/core/SkMipmapBuilder.h" |
| #include "tools/Resources.h" |
| #include "tools/ToolUtils.h" |
| |
| #include <math.h> |
| |
| class ShowMipLevels3 : public skiagm::GM { |
| sk_sp<SkImage> fImg; |
| |
| SkString onShortName() override { return SkString("showmiplevels_explicit"); } |
| |
| SkISize onISize() override { return {1130, 970}; } |
| |
| void onOnceBeforeDraw() override { |
| fImg = GetResourceAsImage("images/ship.png"); |
| fImg = fImg->makeRasterImage(); // makeWithMips only works on raster for now |
| |
| const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE }; |
| |
| SkMipmapBuilder builder(fImg->imageInfo()); |
| for (int i = 0; i < builder.countLevels(); ++i) { |
| auto surf = SkSurface::MakeRasterDirect(builder.level(i)); |
| surf->getCanvas()->drawColor(colors[i % std::size(colors)]); |
| } |
| fImg = builder.attachTo(fImg.get()); |
| } |
| |
| DrawResult onDraw(SkCanvas* canvas, SkString*) override { |
| canvas->drawColor(0xFFDDDDDD); |
| |
| canvas->translate(10, 10); |
| for (auto mm : {SkMipmapMode::kNone, SkMipmapMode::kNearest, SkMipmapMode::kLinear}) { |
| for (auto fm : {SkFilterMode::kNearest, SkFilterMode::kLinear}) { |
| canvas->translate(0, draw_downscaling(canvas, {fm, mm})); |
| } |
| } |
| return DrawResult::kOk; |
| } |
| |
| private: |
| SkScalar draw_downscaling(SkCanvas* canvas, SkSamplingOptions sampling) { |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| SkPaint paint; |
| SkRect r = {0, 0, 150, 150}; |
| for (float scale = 1; scale >= 0.1f; scale *= 0.7f) { |
| SkMatrix matrix = SkMatrix::Scale(scale, scale); |
| paint.setShader(fImg->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat, |
| sampling, &matrix)); |
| canvas->drawRect(r, paint); |
| canvas->translate(r.width() + 10, 0); |
| } |
| return r.height() + 10; |
| } |
| |
| using INHERITED = skiagm::GM; |
| }; |
| DEF_GM( return new ShowMipLevels3; ) |