flutter_flutter/flow/opacity_layer.cc
Adam Barth 0b629d419f Move //sky/compositor to //flow
Now that the compositor doesn't have any tricky deps, we can make it a
top-level project, which saves a bunch of typing.
2016-01-12 22:39:51 -08:00

32 lines
816 B
C++

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "flow/opacity_layer.h"
namespace flow {
OpacityLayer::OpacityLayer() {
}
OpacityLayer::~OpacityLayer() {
}
void OpacityLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
ContainerLayer::Preroll(context, matrix);
set_paint_bounds(context->child_paint_bounds);
}
void OpacityLayer::Paint(PaintContext::ScopedFrame& frame) {
SkPaint paint;
paint.setColor(SkColorSetARGB(alpha_, 0, 0, 0));
paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
SkCanvas& canvas = frame.canvas();
SkAutoCanvasRestore save(&canvas, false);
canvas.saveLayer(&paint_bounds(), &paint);
PaintChildren(frame);
}
} // namespace flow