// 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