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https://github.com/encounter/engine.git
synced 2026-07-10 03:18:43 -07:00
Jim Graham
85953615eb
Currently helps primarily on iOS when no BackdropFilter is present by lowering energy usage
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/flow/layers/shader_mask_layer.h"
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namespace flutter {
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ShaderMaskLayer::ShaderMaskLayer(sk_sp<SkShader> shader,
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const SkRect& mask_rect,
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SkBlendMode blend_mode)
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: shader_(shader), mask_rect_(mask_rect), blend_mode_(blend_mode) {}
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void ShaderMaskLayer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
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Layer::AutoPrerollSaveLayerState save =
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Layer::AutoPrerollSaveLayerState::Create(context);
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ContainerLayer::Preroll(context, matrix);
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}
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void ShaderMaskLayer::Paint(PaintContext& context) const {
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TRACE_EVENT0("flutter", "ShaderMaskLayer::Paint");
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FML_DCHECK(needs_painting());
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Layer::AutoSaveLayer save =
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Layer::AutoSaveLayer::Create(context, paint_bounds(), nullptr);
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PaintChildren(context);
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SkPaint paint;
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paint.setBlendMode(blend_mode_);
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paint.setShader(shader_);
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context.leaf_nodes_canvas->translate(mask_rect_.left(), mask_rect_.top());
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context.leaf_nodes_canvas->drawRect(
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SkRect::MakeWH(mask_rect_.width(), mask_rect_.height()), paint);
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}
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} // namespace flutter
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