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- // Copyright 2019 Google LLC.
- // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
- #include "tools/fiddle/examples.h"
- // HASH=cd7543fa8c9f3cede46dc2d72eb8c4bd
- REG_FIDDLE(Bitmap_extractAlpha_3, 256, 128, false, 0) {
- void draw(SkCanvas* canvas) {
- SkBitmap alpha, bitmap;
- bitmap.allocN32Pixels(100, 100);
- SkCanvas offscreen(bitmap);
- offscreen.clear(0);
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setColor(SK_ColorBLUE);
- paint.setStyle(SkPaint::kStroke_Style);
- paint.setStrokeWidth(20);
- offscreen.drawCircle(50, 50, 39, paint);
- offscreen.flush();
- paint.setMaskFilter(SkMaskFilter::MakeBlur(kOuter_SkBlurStyle, 3));
- SkIPoint offset;
- bitmap.extractAlpha(&alpha, &paint, nullptr, &offset);
- paint.setColor(SK_ColorRED);
- canvas->drawBitmap(bitmap, 0, -offset.fY, &paint);
- canvas->drawBitmap(alpha, 100 + offset.fX, 0, &paint);
- }
- } // END FIDDLE
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