1 /*
2 *
3 * Copyright 2019, The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #pragma once
19
20 #include <stddef.h>
21
22 #include <teeui/label.h>
23
24 namespace teeui {
25 namespace example {
26
27 /*
28 * AOSP color scheme constants.
29 */
30 constexpr static const Color kShieldColor = Color(0xff778500);
31 constexpr static const Color kShieldColorInv = Color(0xffc4cb80);
32 constexpr static const Color kTextColor = Color(0xff212121);
33 constexpr static const Color kTextColorInv = Color(0xffdedede);
34 constexpr static const Color kBackGroundColor = Color(0xffffffff);
35 constexpr static const Color kBackGroundColorInv = Color(0xff212121);
36
37 uint32_t alfaCombineChannel(uint32_t shift, double alfa, uint32_t a, uint32_t b);
38
renderPixel(uint32_t x,uint32_t y,const T & e)39 template <typename T> uint32_t renderPixel(uint32_t x, uint32_t y, const T& e) {
40 return e.bounds_.drawPoint(Point<pxs>(x, y));
41 }
42
43 struct FrameBuffer {
44 uint32_t left_;
45 uint32_t top_;
46 uint32_t width_;
47 uint32_t height_;
48 uint32_t* buffer_;
49 size_t size_in_elements_;
50 uint32_t lineStride_;
51
52 Error drawPixel(uint32_t x, uint32_t y, uint32_t color) const;
53 };
54
55 template <typename... Elements>
drawElements(std::tuple<Elements...> & layout,const PixelDrawer & drawPixel)56 Error drawElements(std::tuple<Elements...>& layout, const PixelDrawer& drawPixel) {
57 // Error::operator|| is overloaded, so we don't get short circuit evaluation.
58 // But we get the first error that occurs. We will still try and draw the remaining
59 // elements in the order they appear in the layout tuple.
60 return (std::get<Elements>(layout).draw(drawPixel) || ...);
61 }
62
63 template <typename... Elements>
handleAllEvent(std::tuple<Elements...> & layout,const Event & event)64 Error handleAllEvent(std::tuple<Elements...>& layout, const Event& event) {
65 return (std::get<Elements>(layout).hit(event) || ...);
66 }
67
68 void translate(LabelImpl* label);
69
translateLabel(Layout * layout)70 template <typename T, typename Layout> void translateLabel(Layout* layout) {
71 translate(&std::get<T>(*layout));
72 }
73 } // namespace example
74 } // namespace teeui