blob: d1344b31ae07d587b9825b48d5cf543cae18c3e4 [file] [log] [blame]
/*
* 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/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.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 "include/core/SkSurface.h"
#include "include/effects/SkImageFilters.h"
#include <utility>
namespace skiagm {
class ResizeGM : public GM {
public:
ResizeGM() {
this->setBGColor(0x00000000);
}
protected:
SkString getName() const override { return SkString("resizeimagefilter"); }
void draw(SkCanvas* canvas,
const SkRect& rect,
const SkSize& deviceSize,
const SkSamplingOptions& sampling,
sk_sp<SkImageFilter> input) {
SkRect dstRect;
canvas->getLocalToDeviceAs3x3().mapRect(&dstRect, rect);
canvas->save();
SkScalar deviceScaleX = deviceSize.width() / dstRect.width();
SkScalar deviceScaleY = deviceSize.height() / dstRect.height();
canvas->translate(rect.x(), rect.y());
canvas->scale(deviceScaleX, deviceScaleY);
canvas->translate(-rect.x(), -rect.y());
SkMatrix matrix;
matrix.setScale(SkScalarInvert(deviceScaleX), SkScalarInvert(deviceScaleY));
sk_sp<SkImageFilter> filter(SkImageFilters::MatrixTransform(matrix,
sampling,
std::move(input)));
SkPaint filteredPaint;
filteredPaint.setImageFilter(std::move(filter));
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();
}
SkISize getISize() override { return SkISize::Make(630, 100); }
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
const SkSamplingOptions samplings[] = {
SkSamplingOptions(),
SkSamplingOptions(SkFilterMode::kLinear),
SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear),
SkSamplingOptions(SkCubicResampler::Mitchell()),
SkSamplingOptions::Aniso(16),
};
const SkRect srcRect = SkRect::MakeWH(96, 96);
const SkSize deviceSize = SkSize::Make(16, 16);
for (const auto& sampling : samplings) {
this->draw(canvas, srcRect, deviceSize, sampling, nullptr);
canvas->translate(srcRect.width() + SkIntToScalar(10), 0);
}
{
sk_sp<SkSurface> surface(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(16, 16)));
SkCanvas* surfaceCanvas = surface->getCanvas();
surfaceCanvas->clear(0x000000);
{
SkPaint paint;
paint.setColor(0xFF00FF00);
SkRect ovalRect = SkRect::MakeWH(16, 16);
ovalRect.inset(SkIntToScalar(2)/3, SkIntToScalar(2)/3);
surfaceCanvas->drawOval(ovalRect, paint);
}
sk_sp<SkImage> image(surface->makeImageSnapshot());
SkRect inRect = SkRect::MakeXYWH(-4, -4, 20, 20);
SkRect outRect = SkRect::MakeXYWH(-24, -24, 120, 120);
sk_sp<SkImageFilter> source(
SkImageFilters::Image(std::move(image), inRect, outRect,
SkSamplingOptions({1/3.0f, 1/3.0f})));
this->draw(canvas, srcRect, deviceSize, samplings[3], std::move(source));
}
}
private:
using INHERITED = GM;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ResizeGM; )
} // namespace skiagm