blob: ac39b9498e9f21495adb0a9a4051d2d2954e9961 [file] [log] [blame]
/*
*
* Copyright (c) 2020 Project CHIP Authors
* Copyright (c) 2018 Nest Labs, Inc.
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file QRCodeScreen.cpp
*
* Screen which displays a QR code.
*
*/
#include "QRCodeScreen.h"
#if CONFIG_HAVE_DISPLAY
// TODO organize includes below
#include "esp_log.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "qrcodegen.h"
#include <lib/support/CodeUtils.h>
#include <platform/CHIPDeviceLayer.h>
#include <setup_payload/QRCodeSetupPayloadGenerator.h>
#include <string>
// TODO need sensible library tag when put in library
extern const char TAG[];
namespace {
constexpr int kVersion = 4;
constexpr int kModuleSize = 4;
constexpr int kBorderSize = 1;
color_t qrCodeColor = TFT_LIGHTGREY;
}; // namespace
QRCodeScreen::QRCodeScreen(std::string text, std::string title) : title(title)
{
constexpr int qrCodeSize = qrcodegen_BUFFER_LEN_FOR_VERSION(kVersion);
// TODO check text length against max size permitted, or maybe adjust version used accordingly
std::vector<uint8_t> temp(qrCodeSize);
qrCode.resize(qrCodeSize);
if (!qrcodegen_encodeText(text.c_str(), temp.data(), qrCode.data(), qrcodegen_Ecc_LOW, kVersion, kVersion, qrcodegen_Mask_AUTO,
true))
{
ESP_LOGE(TAG, "qrcodegen_encodeText() failed");
qrCode.clear();
}
}
void QRCodeScreen::Display()
{
if (qrCode.empty())
{
return;
}
const uint8_t * data = qrCode.data();
const int size = qrcodegen_getSize(data);
const int displaySize = (2 * kBorderSize + size) * kModuleSize;
const int displayX = (DisplayWidth - displaySize) / 2;
const int displayY = ScreenTitleSafeTop + ((DisplayHeight - ScreenTitleSafeTop - ScreenTitleSafeBottom) - displaySize) / 2;
TFT_fillRect(displayX, displayY, displaySize, displaySize, qrCodeColor);
for (int y = 0; y < size; ++y)
{
for (int x = 0; x < size; ++x)
{
if (qrcodegen_getModule(data, x, y))
{
TFT_fillRect(displayX + (kBorderSize + x) * kModuleSize, displayY + (kBorderSize + y) * kModuleSize, kModuleSize,
kModuleSize, TFT_BLACK);
}
}
}
}
#endif // CONFIG_HAVE_DISPLAY