blob: fddb2f4e00393993d403953d6a143d107dfbbf3e [file] [log] [blame]
/*
* 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/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTileMode.h"
#include "src/core/SkMipmap.h"
#include "src/core/SkMipmapBuilder.h"
#include "tools/DecodeUtils.h"
#include "tools/Resources.h"
#include "tools/ToolUtils.h"
#include <math.h>
class ShowMipLevels3 : public skiagm::GM {
sk_sp<SkImage> fImg;
SkString getName() const override { return SkString("showmiplevels_explicit"); }
SkISize getISize() override { return {1130, 970}; }
void onOnceBeforeDraw() override {
fImg = ToolUtils::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 = SkSurfaces::WrapPixels(builder.level(i));
surf->getCanvas()->drawColor(colors[i % std::size(colors)]);
}
fImg = builder.attachTo(fImg);
}
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; )