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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkImageSource.h"
#include "SkMagnifierImageFilter.h"
#include "SkPixelRef.h"
#include "SkRandom.h"
#include "SkSurface.h"
#define WIDTH 500
#define HEIGHT 500
DEF_SIMPLE_GM_BG(imagemagnifier, canvas, WIDTH, HEIGHT, SK_ColorBLACK) {
SkPaint filterPaint;
filterPaint.setImageFilter(
SkMagnifierImageFilter::Make(
SkRect::MakeXYWH(SkIntToScalar(100), SkIntToScalar(100),
SkIntToScalar(WIDTH / 2),
SkIntToScalar(HEIGHT / 2)),
100, nullptr));
canvas->saveLayer(nullptr, &filterPaint);
const char* str = "The quick brown fox jumped over the lazy dog.";
SkRandom rand;
for (int i = 0; i < 25; ++i) {
int x = rand.nextULessThan(WIDTH);
int y = rand.nextULessThan(HEIGHT);
SkPaint paint;
sk_tool_utils::set_portable_typeface(&paint);
paint.setColor(sk_tool_utils::color_to_565(rand.nextBits(24) | 0xFF000000));
paint.setTextSize(rand.nextRangeScalar(0, 300));
paint.setAntiAlias(true);
canvas->drawString(str, SkIntToScalar(x),
SkIntToScalar(y), paint);
}
canvas->restore();
}
////////////////////////////////////////////////////////////////////////////////
#define WIDTH_HEIGHT 256
static sk_sp<SkImage> make_img() {
SkBitmap bitmap;
bitmap.allocN32Pixels(WIDTH_HEIGHT, WIDTH_HEIGHT);
SkCanvas canvas(bitmap);
canvas.clear(0x0);
SkPaint paint;
paint.setColor(SK_ColorBLUE);
for (float pos = 0; pos < WIDTH_HEIGHT; pos += 16) {
canvas.drawLine(0, pos, SkIntToScalar(WIDTH_HEIGHT), pos, paint);
canvas.drawLine(pos, 0, pos, SkIntToScalar(WIDTH_HEIGHT), paint);
}
SkBitmap result;
result.setInfo(SkImageInfo::MakeS32(WIDTH_HEIGHT, WIDTH_HEIGHT, kPremul_SkAlphaType));
result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0);
return SkImage::MakeFromBitmap(result);
}
DEF_SIMPLE_GM_BG(imagemagnifier_cropped, canvas, WIDTH_HEIGHT, WIDTH_HEIGHT, SK_ColorBLACK) {
sk_sp<SkImage> image(make_img());
sk_sp<SkImageFilter> imageSource(SkImageSource::Make(std::move(image)));
SkRect srcRect = SkRect::MakeWH(SkIntToScalar(WIDTH_HEIGHT-32),
SkIntToScalar(WIDTH_HEIGHT-32));
srcRect.inset(64.0f, 64.0f);
constexpr SkScalar kInset = 64.0f;
// Crop out a 16 pixel ring around the result
const SkRect rect = SkRect::MakeXYWH(16, 16, WIDTH_HEIGHT-32, WIDTH_HEIGHT-32);
SkImageFilter::CropRect cropRect(rect);
SkPaint filterPaint;
filterPaint.setImageFilter(SkMagnifierImageFilter::Make(srcRect, kInset,
std::move(imageSource),
&cropRect));
canvas->saveLayer(nullptr, &filterPaint);
canvas->restore();
}
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