53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
/*
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* Copyright 2020 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/SkCanvas.h"
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#include "include/core/SkSurface.h"
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DEF_SIMPLE_GM(bicubic, canvas, 300, 320) {
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canvas->clear(SK_ColorBLACK);
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const SkSamplingOptions gSamplings[] = {
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SkSamplingOptions(SkFilterMode::kNearest),
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SkSamplingOptions(SkFilterMode::kLinear),
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SkSamplingOptions(SkCubicResampler::Mitchell()),
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};
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auto make_img = []() {
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auto surf = SkSurface::MakeRasterN32Premul(7, 7);
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surf->getCanvas()->drawColor(SK_ColorBLACK);
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SkPaint paint;
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paint.setColor(SK_ColorWHITE);
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surf->getCanvas()->drawLine(3.5f, 0, 3.5f, 8, paint);
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return surf->makeImageSnapshot();
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};
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auto img = make_img();
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canvas->scale(40, 8);
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for (const auto& s : gSamplings) {
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canvas->drawImage(img, 0, 0, s, nullptr);
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canvas->translate(0, img->height() + 1.0f);
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}
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const SkRect r = SkRect::MakeIWH(img->width(), img->height());
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SkPaint paint;
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SkImage::CubicResampler cubics[] = {
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SkCubicResampler::CatmullRom(),
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SkCubicResampler::Mitchell(),
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};
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for (auto c : cubics) {
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paint.setShader(img->makeShader(SkTileMode::kClamp, SkTileMode::kClamp,
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SkSamplingOptions(c)));
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canvas->drawRect(r, paint);
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canvas->translate(0, img->height() + 1.0f);
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}
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}
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