86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkColorPriv.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPixmap.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/private/SkNx.h"
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#include "src/core/SkMipmap.h"
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#include "src/core/SkMipmapBuilder.h"
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#include "tools/Resources.h"
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#include "tools/ToolUtils.h"
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#include <math.h>
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class ShowMipLevels3 : public skiagm::GM {
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sk_sp<SkImage> fImg;
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SkString onShortName() override { return SkString("showmiplevels_explicit"); }
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SkISize onISize() override { return {1130, 970}; }
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void onOnceBeforeDraw() override {
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fImg = GetResourceAsImage("images/ship.png");
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fImg = fImg->makeRasterImage(); // makeWithMips only works on raster for now
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const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
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SkMipmapBuilder builder(fImg->imageInfo());
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for (int i = 0; i < builder.countLevels(); ++i) {
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auto surf = SkSurface::MakeRasterDirect(builder.level(i));
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surf->getCanvas()->drawColor(colors[i % SK_ARRAY_COUNT(colors)]);
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}
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fImg = builder.attachTo(fImg.get());
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}
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DrawResult onDraw(SkCanvas* canvas, SkString*) override {
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if (canvas->recordingContext()) {
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// mips not supported yet
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return DrawResult::kSkip;
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}
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canvas->drawColor(0xFFDDDDDD);
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canvas->translate(10, 10);
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for (auto mm : {SkMipmapMode::kNone, SkMipmapMode::kNearest, SkMipmapMode::kLinear}) {
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for (auto fm : {SkFilterMode::kNearest, SkFilterMode::kLinear}) {
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canvas->translate(0, draw_downscaling(canvas, {fm, mm}));
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}
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}
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return DrawResult::kOk;
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}
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private:
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SkScalar draw_downscaling(SkCanvas* canvas, SkSamplingOptions sampling) {
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SkAutoCanvasRestore acr(canvas, true);
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SkPaint paint;
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SkRect r = {0, 0, 150, 150};
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for (float scale = 1; scale >= 0.1f; scale *= 0.7f) {
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SkMatrix matrix = SkMatrix::Scale(scale, scale);
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paint.setShader(fImg->makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
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sampling, &matrix));
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canvas->drawRect(r, paint);
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canvas->translate(r.width() + 10, 0);
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}
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return r.height() + 10;
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}
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using INHERITED = skiagm::GM;
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};
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DEF_GM( return new ShowMipLevels3; )
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