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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/gm.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkImageFilter.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPixelRef.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkTypeface.h"
- #include "include/effects/SkImageSource.h"
- #include "include/effects/SkMagnifierImageFilter.h"
- #include "include/utils/SkRandom.h"
- #include "tools/ToolUtils.h"
- #include <utility>
- #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;
- SkFont font(ToolUtils::create_portable_typeface());
- for (int i = 0; i < 25; ++i) {
- int x = rand.nextULessThan(WIDTH);
- int y = rand.nextULessThan(HEIGHT);
- SkPaint paint;
- paint.setColor(ToolUtils::color_to_565(rand.nextBits(24) | 0xFF000000));
- font.setSize(rand.nextRangeScalar(0, 300));
- canvas->drawString(str, SkIntToScalar(x), SkIntToScalar(y), font, 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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