101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/*
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* Copyright 2012 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/SkFont.h"
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#include "include/core/SkImage.h"
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#include "include/core/SkImageFilter.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/SkPixelRef.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/SkTypeface.h"
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#include "include/effects/SkImageFilters.h"
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#include "include/utils/SkRandom.h"
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#include "tools/ToolUtils.h"
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#include <utility>
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#define WIDTH 500
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#define HEIGHT 500
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DEF_SIMPLE_GM_BG(imagemagnifier, canvas, WIDTH, HEIGHT, SK_ColorBLACK) {
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SkPaint filterPaint;
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filterPaint.setImageFilter(
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SkImageFilters::Magnifier(
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SkRect::MakeXYWH(SkIntToScalar(100), SkIntToScalar(100),
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SkIntToScalar(WIDTH / 2),
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SkIntToScalar(HEIGHT / 2)),
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100, nullptr));
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canvas->saveLayer(nullptr, &filterPaint);
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const char* str = "The quick brown fox jumped over the lazy dog.";
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SkRandom rand;
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SkFont font(ToolUtils::create_portable_typeface());
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for (int i = 0; i < 25; ++i) {
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int x = rand.nextULessThan(WIDTH);
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int y = rand.nextULessThan(HEIGHT);
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SkPaint paint;
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paint.setColor(ToolUtils::color_to_565(rand.nextBits(24) | 0xFF000000));
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font.setSize(rand.nextRangeScalar(0, 300));
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canvas->drawString(str, SkIntToScalar(x), SkIntToScalar(y), font, paint);
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}
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canvas->restore();
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}
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////////////////////////////////////////////////////////////////////////////////
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#define WIDTH_HEIGHT 256
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static sk_sp<SkImage> make_img() {
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SkBitmap bitmap;
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bitmap.allocN32Pixels(WIDTH_HEIGHT, WIDTH_HEIGHT);
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SkCanvas canvas(bitmap);
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canvas.clear(0x0);
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SkPaint paint;
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paint.setColor(SK_ColorBLUE);
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for (float pos = 0; pos < WIDTH_HEIGHT; pos += 16) {
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canvas.drawLine(0, pos, SkIntToScalar(WIDTH_HEIGHT), pos, paint);
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canvas.drawLine(pos, 0, pos, SkIntToScalar(WIDTH_HEIGHT), paint);
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}
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SkBitmap result;
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result.setInfo(SkImageInfo::MakeS32(WIDTH_HEIGHT, WIDTH_HEIGHT, kPremul_SkAlphaType));
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result.setPixelRef(sk_ref_sp(bitmap.pixelRef()), 0, 0);
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return result.asImage();
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}
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DEF_SIMPLE_GM_BG(imagemagnifier_cropped, canvas, WIDTH_HEIGHT, WIDTH_HEIGHT, SK_ColorBLACK) {
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sk_sp<SkImage> image(make_img());
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sk_sp<SkImageFilter> imageSource(SkImageFilters::Image(std::move(image)));
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SkRect srcRect = SkRect::MakeWH(SkIntToScalar(WIDTH_HEIGHT-32),
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SkIntToScalar(WIDTH_HEIGHT-32));
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srcRect.inset(64.0f, 64.0f);
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constexpr SkScalar kInset = 64.0f;
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// Crop out a 16 pixel ring around the result
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const SkIRect cropRect = SkIRect::MakeXYWH(16, 16, WIDTH_HEIGHT-32, WIDTH_HEIGHT-32);
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SkPaint filterPaint;
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filterPaint.setImageFilter(SkImageFilters::Magnifier(
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srcRect, kInset, std::move(imageSource), &cropRect));
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canvas->saveLayer(nullptr, &filterPaint);
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canvas->restore();
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}
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