24 lines
875 B
C++
24 lines
875 B
C++
// Copyright 2019 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#include "tools/fiddle/examples.h"
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// HASH=ab6577df079e6c70511cf2bfc6447b44
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REG_FIDDLE(Bitmap_extractAlpha, 256, 100, false, 0) {
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void draw(SkCanvas* canvas) {
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SkBitmap alpha, bitmap;
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bitmap.allocN32Pixels(100, 100);
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SkCanvas offscreen(bitmap);
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offscreen.clear(0);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorBLUE);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(20);
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offscreen.drawCircle(50, 50, 39, paint);
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offscreen.flush();
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bitmap.extractAlpha(&alpha);
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paint.setColor(SK_ColorRED);
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canvas->drawImage(bitmap.asImage(), 0, 0, SkSamplingOptions(), &paint);
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canvas->drawImage(alpha.asImage(), 100, 0, SkSamplingOptions(), &paint);
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}
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} // END FIDDLE
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