// 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=ab6577df079e6c70511cf2bfc6447b44 REG_FIDDLE(Bitmap_extractAlpha, 256, 100, 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(); bitmap.extractAlpha(&alpha); paint.setColor(SK_ColorRED); canvas->drawBitmap(bitmap, 0, 0, &paint); canvas->drawBitmap(alpha, 100, 0, &paint); } } // END FIDDLE