74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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*
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* Copyright 2019, The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stddef.h>
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#include <teeui/label.h>
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namespace teeui {
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namespace example {
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/*
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* AOSP color scheme constants.
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*/
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constexpr static const Color kShieldColor = Color(0xff778500);
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constexpr static const Color kShieldColorInv = Color(0xffc4cb80);
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constexpr static const Color kTextColor = Color(0xff212121);
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constexpr static const Color kTextColorInv = Color(0xffdedede);
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constexpr static const Color kBackGroundColor = Color(0xffffffff);
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constexpr static const Color kBackGroundColorInv = Color(0xff212121);
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uint32_t alfaCombineChannel(uint32_t shift, double alfa, uint32_t a, uint32_t b);
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template <typename T> uint32_t renderPixel(uint32_t x, uint32_t y, const T& e) {
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return e.bounds_.drawPoint(Point<pxs>(x, y));
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}
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struct FrameBuffer {
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uint32_t left_;
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uint32_t top_;
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uint32_t width_;
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uint32_t height_;
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uint32_t* buffer_;
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size_t size_in_elements_;
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uint32_t lineStride_;
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Error drawPixel(uint32_t x, uint32_t y, uint32_t color) const;
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};
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template <typename... Elements>
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Error drawElements(std::tuple<Elements...>& layout, const PixelDrawer& drawPixel) {
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// Error::operator|| is overloaded, so we don't get short circuit evaluation.
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// But we get the first error that occurs. We will still try and draw the remaining
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// elements in the order they appear in the layout tuple.
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return (std::get<Elements>(layout).draw(drawPixel) || ...);
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}
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template <typename... Elements>
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Error handleAllEvent(std::tuple<Elements...>& layout, const Event& event) {
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return (std::get<Elements>(layout).hit(event) || ...);
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}
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void translate(LabelImpl* label);
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template <typename T, typename Layout> void translateLabel(Layout* layout) {
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translate(&std::get<T>(*layout));
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}
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} // namespace example
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} // namespace teeui
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