438 lines
16 KiB
C++
438 lines
16 KiB
C++
/*
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* Copyright (C) 2021 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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#include "host/libs/confui/host_renderer.h"
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#include "host/libs/config/cuttlefish_config.h"
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namespace cuttlefish {
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namespace confui {
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static teeui::Color alfaCombineChannel(std::uint32_t shift, double alfa,
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teeui::Color a, teeui::Color b) {
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a >>= shift;
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a &= 0xff;
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b >>= shift;
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b &= 0xff;
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double acc = alfa * a + (1 - alfa) * b;
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if (acc <= 0) return 0;
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std::uint32_t result = acc;
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if (result > 255) return 255 << shift;
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return result << shift;
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}
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/**
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* create a raw frame for confirmation UI dialog
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*
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* Many rendering code borrowed from the following source
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* https://android.googlesource.com/trusty/app/confirmationui/+/0429cc7/src
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*/
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class ConfUiRendererImpl {
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friend class ConfUiRenderer;
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public:
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using LabelConfMsg = teeui::LabelBody;
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private:
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static Result<std::unique_ptr<ConfUiRendererImpl>> GenerateRenderer(
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const std::uint32_t display, const std::string& confirmation_msg,
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const std::string& locale, const bool inverted, const bool magnified);
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/**
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* this does not repaint from the scratch all the time
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*
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* It does repaint its frame buffer only when w/h of
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* current display has changed
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*/
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std::unique_ptr<TeeUiFrameWrapper>& RenderRawFrame();
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bool IsFrameReady() const { return raw_frame_ && !raw_frame_->IsEmpty(); }
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bool IsInConfirm(const std::uint32_t x, const std::uint32_t y) {
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return IsInside<teeui::LabelOK>(x, y);
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}
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bool IsInCancel(const std::uint32_t x, const std::uint32_t y) {
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return IsInside<teeui::LabelCancel>(x, y);
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}
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bool IsSetUpSuccessful() const { return is_setup_well_; }
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ConfUiRendererImpl(const std::uint32_t display,
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const std::string& confirmation_msg,
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const std::string& locale, const bool inverted,
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const bool magnified);
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struct Boundary { // inclusive but.. LayoutElement's size is float
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std::uint32_t x, y, w, h; // (x, y) is the top left
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};
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template <typename LayoutElement>
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Boundary GetBoundary(LayoutElement&& e) const {
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auto box = e.bounds_;
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Boundary b;
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// (x,y) is left top. so floor() makes sense
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// w, h are witdh and height in float. perhaps ceiling makes more
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// sense
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b.x = static_cast<std::uint32_t>(box.x().floor().count());
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b.y = static_cast<std::uint32_t>(box.y().floor().count());
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b.w = static_cast<std::uint32_t>(box.w().ceil().count());
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b.h = static_cast<std::uint32_t>(box.h().ceil().count());
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return b;
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}
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template <typename Element>
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bool IsInside(const std::uint32_t x, const std::uint32_t y) const {
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auto box = GetBoundary(std::get<Element>(layout_));
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if (x >= box.x && x <= box.x + box.w && y >= box.y && y <= box.y + box.h) {
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return true;
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}
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return false;
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}
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// essentially, to repaint from the scratch, so returns new frame
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// when successful. Or, nullopt
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std::unique_ptr<TeeUiFrameWrapper> RepaintRawFrame(const int w, const int h);
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bool InitLayout(const std::string& lang_id);
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teeui::Error UpdateTranslations();
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teeui::Error UpdateLocale();
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void SetDeviceContext(const unsigned long long w, const unsigned long long h,
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bool is_inverted, bool is_magnified);
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// a callback function to be effectively sent to TeeUI library
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teeui::Error UpdatePixels(TeeUiFrameWrapper& buffer, std::uint32_t x,
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std::uint32_t y, teeui::Color color);
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// second param is for type deduction
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template <typename... Elements>
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static teeui::Error drawElements(std::tuple<Elements...>& layout,
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const teeui::PixelDrawer& drawPixel) {
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// Error::operator|| is overloaded, so we don't get short circuit
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// evaluation. But we get the first error that occurs. We will still try and
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// draw the remaining 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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void UpdateColorScheme(const bool is_inverted);
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template <typename Label>
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auto SetText(const std::string& text) {
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return std::get<Label>(layout_).setText(
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{text.c_str(), text.c_str() + text.size()});
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}
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template <typename Label>
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teeui::Error UpdateString();
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std::uint32_t display_num_;
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teeui::layout_t<teeui::ConfUILayout> layout_;
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std::string lang_id_;
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std::string prompt_text_; // confirmation ui message
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/**
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* Potentially, the same frame could be requested multiple times.
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*
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* While another thread/caller is using this frame, the frame should
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* be kept here, too, to be returned upon future requests.
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*
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*/
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std::unique_ptr<TeeUiFrameWrapper> raw_frame_;
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std::uint32_t current_height_;
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std::uint32_t current_width_;
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teeui::Color color_bg_;
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teeui::Color color_text_;
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teeui::Color shield_color_;
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bool is_inverted_;
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bool is_magnified_;
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teeui::context<teeui::ConfUIParameters> ctx_;
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bool is_setup_well_;
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static constexpr const teeui::Color kColorBackground = 0xffffffff;
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static constexpr const teeui::Color kColorBackgroundInv = 0xff212121;
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static constexpr const teeui::Color kColorDisabled = 0xffbdbdbd;
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static constexpr const teeui::Color kColorDisabledInv = 0xff424242;
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static constexpr const teeui::Color kColorEnabled = 0xff212121;
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static constexpr const teeui::Color kColorEnabledInv = 0xffdedede;
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static constexpr const teeui::Color kColorShield = 0xff778500;
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static constexpr const teeui::Color kColorShieldInv = 0xffc4cb80;
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static constexpr const teeui::Color kColorText = 0xff212121;
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static constexpr const teeui::Color kColorTextInv = 0xffdedede;
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};
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Result<std::unique_ptr<ConfUiRendererImpl>>
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ConfUiRendererImpl::GenerateRenderer(const std::uint32_t display,
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const std::string& confirmation_msg,
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const std::string& locale,
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const bool inverted,
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const bool magnified) {
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ConfUiRendererImpl* raw_ptr = new ConfUiRendererImpl(
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display, confirmation_msg, locale, inverted, magnified);
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CF_EXPECT(raw_ptr && raw_ptr->IsSetUpSuccessful(),
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"Failed to create ConfUiRendererImpl");
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return std::unique_ptr<ConfUiRendererImpl>(raw_ptr);
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}
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static int GetDpi(const int display_num = 0) {
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auto config = CuttlefishConfig::Get();
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CHECK(config) << "Config is Missing";
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auto instance = config->ForDefaultInstance();
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auto display_configs = instance.display_configs();
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CHECK_GT(display_configs.size(), display_num)
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<< "Invalid display number " << display_num;
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return display_configs[display_num].dpi;
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}
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/**
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* device configuration
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*
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* ctx_{# of pixels in 1 mm, # of pixels per 1 density independent pixels}
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*
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* The numbers are, however, to fit for the host webRTC local/remote clients
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* in general, not necessarily the supposedly guest device (e.g. Auto, phone,
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* etc)
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*
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* In general, for a normal PC, roughly ctx_(6.45211, 400.0/412.0) is a good
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* combination for the default DPI, 320. If we want to see the impact
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* of the change in the guest DPI, we could adjust the combination above
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* proportionally
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*
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*/
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ConfUiRendererImpl::ConfUiRendererImpl(const std::uint32_t display,
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const std::string& confirmation_msg,
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const std::string& locale,
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const bool inverted,
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const bool magnified)
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: display_num_{display},
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lang_id_{locale},
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prompt_text_{confirmation_msg},
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current_height_{ScreenConnectorInfo::ScreenHeight(display_num_)},
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current_width_{ScreenConnectorInfo::ScreenWidth(display_num_)},
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is_inverted_(inverted),
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is_magnified_(magnified),
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ctx_(6.45211 * GetDpi() / 320.0, 400.0 / 412.0 * GetDpi() / 320.0),
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is_setup_well_(false) {
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SetDeviceContext(current_width_, current_height_, is_inverted_,
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is_magnified_);
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layout_ = teeui::instantiateLayout(teeui::ConfUILayout(), ctx_);
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if (auto error = UpdateLocale()) {
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ConfUiLog(ERROR) << "Update Translation Error: " << Enum2Base(error.code());
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// is_setup_well_ = false;
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return;
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}
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UpdateColorScheme(is_inverted_);
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SetText<LabelConfMsg>(prompt_text_);
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is_setup_well_ = true;
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}
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teeui::Error ConfUiRendererImpl::UpdateLocale() {
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using teeui::Error;
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teeui::localization::selectLangId(lang_id_.c_str());
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if (auto error = UpdateTranslations()) {
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return error;
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}
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return Error::OK;
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}
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template <typename Label>
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teeui::Error ConfUiRendererImpl::UpdateString() {
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using namespace teeui;
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const char* str;
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auto& label = std::get<Label>(layout_);
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str = localization::lookup(TranslationId(label.textId()));
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if (str == nullptr) {
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ConfUiLog(ERROR) << "Given translation_id" << label.textId() << "not found";
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return Error::Localization;
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}
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label.setText({str, str + strlen(str)});
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return Error::OK;
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}
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teeui::Error ConfUiRendererImpl::UpdateTranslations() {
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using namespace teeui;
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if (auto error = UpdateString<LabelOK>()) {
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return error;
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}
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if (auto error = UpdateString<LabelCancel>()) {
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return error;
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}
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if (auto error = UpdateString<LabelTitle>()) {
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return error;
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}
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if (auto error = UpdateString<LabelHint>()) {
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return error;
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}
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return Error::OK;
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}
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void ConfUiRendererImpl::SetDeviceContext(const unsigned long long w,
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const unsigned long long h,
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const bool is_inverted,
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const bool is_magnified) {
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using namespace teeui;
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const auto screen_width = operator""_px(w);
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const auto screen_height = operator""_px(h);
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ctx_.setParam<RightEdgeOfScreen>(pxs(screen_width));
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ctx_.setParam<BottomOfScreen>(pxs(screen_height));
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if (is_magnified) {
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ctx_.setParam<DefaultFontSize>(18_dp);
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ctx_.setParam<BodyFontSize>(20_dp);
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} else {
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ctx_.setParam<DefaultFontSize>(14_dp);
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ctx_.setParam<BodyFontSize>(16_dp);
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}
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if (is_inverted) {
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ctx_.setParam<ShieldColor>(kColorShieldInv);
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ctx_.setParam<ColorText>(kColorTextInv);
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ctx_.setParam<ColorBG>(kColorBackgroundInv);
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ctx_.setParam<ColorButton>(kColorShieldInv);
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} else {
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ctx_.setParam<ShieldColor>(kColorShield);
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ctx_.setParam<ColorText>(kColorText);
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ctx_.setParam<ColorBG>(kColorBackground);
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ctx_.setParam<ColorButton>(kColorShield);
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}
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}
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teeui::Error ConfUiRendererImpl::UpdatePixels(TeeUiFrameWrapper& raw_frame,
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std::uint32_t x, std::uint32_t y,
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teeui::Color color) {
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auto buffer = raw_frame.data();
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const auto height = raw_frame.Height();
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const auto width = raw_frame.Width();
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auto pos = width * y + x;
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if (pos >= (height * width)) {
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ConfUiLog(ERROR) << "Rendering Out of Bound";
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return teeui::Error::OutOfBoundsDrawing;
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}
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const double alfa = ((color & 0xff000000) >> 24) / 255.0;
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auto& pixel = *reinterpret_cast<teeui::Color*>(buffer + pos);
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pixel = alfaCombineChannel(0, alfa, color, pixel) |
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alfaCombineChannel(8, alfa, color, pixel) |
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alfaCombineChannel(16, alfa, color, pixel);
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return teeui::Error::OK;
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}
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void ConfUiRendererImpl::UpdateColorScheme(const bool is_inverted) {
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using namespace teeui;
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color_text_ = is_inverted ? kColorDisabledInv : kColorDisabled;
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shield_color_ = is_inverted ? kColorShieldInv : kColorShield;
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color_bg_ = is_inverted ? kColorBackgroundInv : kColorBackground;
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ctx_.setParam<ShieldColor>(shield_color_);
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ctx_.setParam<ColorText>(color_text_);
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ctx_.setParam<ColorBG>(color_bg_);
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return;
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}
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std::unique_ptr<TeeUiFrameWrapper>& ConfUiRendererImpl::RenderRawFrame() {
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/* we repaint only if one or more of the followng meet:
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*
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* 1. raw_frame_ is empty
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* 2. the current_width_ and current_height_ is out of date
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*
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*/
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const int w = ScreenConnectorInfo::ScreenWidth(display_num_);
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const int h = ScreenConnectorInfo::ScreenHeight(display_num_);
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if (!IsFrameReady() || current_height_ != h || current_width_ != w) {
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auto new_frame = RepaintRawFrame(w, h);
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if (!new_frame) {
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// must repaint but failed
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raw_frame_ = nullptr;
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return raw_frame_;
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}
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// repainting from the scratch successful in a new frame
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raw_frame_ = std::move(new_frame);
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current_width_ = w;
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current_height_ = h;
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}
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return raw_frame_;
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}
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std::unique_ptr<TeeUiFrameWrapper> ConfUiRendererImpl::RepaintRawFrame(
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const int w, const int h) {
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std::get<teeui::LabelOK>(layout_).setTextColor(kColorEnabled);
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std::get<teeui::LabelCancel>(layout_).setTextColor(kColorEnabled);
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/**
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* should be uint32_t for teeui APIs.
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* It assumes that each raw frame buffer element is 4 bytes
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*/
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const teeui::Color background_color =
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is_inverted_ ? kColorBackgroundInv : kColorBackground;
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auto new_raw_frame =
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std::make_unique<TeeUiFrameWrapper>(w, h, background_color);
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auto draw_pixel = teeui::makePixelDrawer(
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[this, &new_raw_frame](std::uint32_t x, std::uint32_t y,
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teeui::Color color) -> teeui::Error {
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return this->UpdatePixels(*new_raw_frame, x, y, color);
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});
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// render all components
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const auto error = drawElements(layout_, draw_pixel);
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if (error) {
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ConfUiLog(ERROR) << "Painting failed: " << error.code();
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return nullptr;
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}
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return new_raw_frame;
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}
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ConfUiRenderer::ConfUiRenderer(ScreenConnectorFrameRenderer& screen_connector)
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: screen_connector_{screen_connector} {}
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ConfUiRenderer::~ConfUiRenderer() {}
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Result<void> ConfUiRenderer::RenderDialog(
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const std::uint32_t display_num, const std::string& prompt_text,
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const std::string& locale, const std::vector<teeui::UIOption>& ui_options) {
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renderer_impl_ = CF_EXPECT(ConfUiRendererImpl::GenerateRenderer(
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display_num, prompt_text, locale, IsInverted(ui_options),
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IsMagnified(ui_options)));
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auto& teeui_frame = renderer_impl_->RenderRawFrame();
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CF_EXPECT(teeui_frame != nullptr, "RenderRawFrame() failed.");
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ConfUiLog(VERBOSE) << "actually trying to render the frame"
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<< thread::GetName();
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auto frame_width = teeui_frame->Width();
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auto frame_height = teeui_frame->Height();
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auto frame_stride_bytes = teeui_frame->ScreenStrideBytes();
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auto frame_bytes = reinterpret_cast<std::uint8_t*>(teeui_frame->data());
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CF_EXPECT(screen_connector_.RenderConfirmationUi(
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display_num, frame_width, frame_height, frame_stride_bytes, frame_bytes));
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return {};
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}
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bool ConfUiRenderer::IsInverted(
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const std::vector<teeui::UIOption>& ui_options) const {
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return Contains(ui_options, teeui::UIOption::AccessibilityInverted);
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}
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bool ConfUiRenderer::IsMagnified(
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const std::vector<teeui::UIOption>& ui_options) const {
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return Contains(ui_options, teeui::UIOption::AccessibilityMagnified);
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}
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bool ConfUiRenderer::IsInConfirm(const std::uint32_t x, const std::uint32_t y) {
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if (!renderer_impl_) {
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ConfUiLog(INFO) << "renderer_impl_ is nullptr";
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}
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return renderer_impl_ && renderer_impl_->IsInConfirm(x, y);
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}
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bool ConfUiRenderer::IsInCancel(const std::uint32_t x, const std::uint32_t y) {
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if (!renderer_impl_) {
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ConfUiLog(INFO) << "renderer_impl_ is nullptr";
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}
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return renderer_impl_ && renderer_impl_->IsInCancel(x, y);
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}
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} // end of namespace confui
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} // end of namespace cuttlefish
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