1*c8dee2aaSAndroid Build Coastguard Worker // Copyright 2019 Google LLC.
2*c8dee2aaSAndroid Build Coastguard Worker // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3*c8dee2aaSAndroid Build Coastguard Worker #include "tools/fiddle/examples.h"
4*c8dee2aaSAndroid Build Coastguard Worker REG_FIDDLE(Bitmap_extractAlpha, 256, 100, false, 0) {
draw(SkCanvas * canvas)5*c8dee2aaSAndroid Build Coastguard Worker void draw(SkCanvas* canvas) {
6*c8dee2aaSAndroid Build Coastguard Worker SkBitmap alpha, bitmap;
7*c8dee2aaSAndroid Build Coastguard Worker bitmap.allocN32Pixels(100, 100);
8*c8dee2aaSAndroid Build Coastguard Worker SkCanvas offscreen(bitmap);
9*c8dee2aaSAndroid Build Coastguard Worker offscreen.clear(0);
10*c8dee2aaSAndroid Build Coastguard Worker SkPaint paint;
11*c8dee2aaSAndroid Build Coastguard Worker paint.setAntiAlias(true);
12*c8dee2aaSAndroid Build Coastguard Worker paint.setColor(SK_ColorBLUE);
13*c8dee2aaSAndroid Build Coastguard Worker paint.setStyle(SkPaint::kStroke_Style);
14*c8dee2aaSAndroid Build Coastguard Worker paint.setStrokeWidth(20);
15*c8dee2aaSAndroid Build Coastguard Worker offscreen.drawCircle(50, 50, 39, paint);
16*c8dee2aaSAndroid Build Coastguard Worker bitmap.extractAlpha(&alpha);
17*c8dee2aaSAndroid Build Coastguard Worker paint.setColor(SK_ColorRED);
18*c8dee2aaSAndroid Build Coastguard Worker canvas->drawImage(bitmap.asImage(), 0, 0, SkSamplingOptions(), &paint);
19*c8dee2aaSAndroid Build Coastguard Worker canvas->drawImage(alpha.asImage(), 100, 0, SkSamplingOptions(), &paint);
20*c8dee2aaSAndroid Build Coastguard Worker }
21*c8dee2aaSAndroid Build Coastguard Worker } // END FIDDLE
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