Add Support for EVGA X20 Gaming Mouse

Commit amended to remove udev rules (which is now autogenerated) by Adam Honse <calcprogrammer1@gmail.com>

Author: CooperCorona

Controllers/EVGAUSBController/EVGAMouseController.cpp

@@ -0,0 +1,346 @@
+/*-------------------------------------------------*\
+|  EVGAMouseController.cpp                          |
+|                                                   |
+|  Driver for EVGA X20 Gaming Mouse RGB Controller. |
+|                                                   |
+|  Cooper Knaak 1/23/2022                           |
+\*-------------------------------------------------*/
+
+#include "EVGAMouseController.h"
+#include "LogManager.h"
+
+#include <algorithm>
+#include <iostream>
+#include <thread>
+#include <chrono>
+
+
+#define HID_MAX_STR 255
+#define EVGA_PERIPHERAL_LED_SOURCE_OF_TRUTH EVGA_PERIPHERAL_LED_LOGO
+/*----------------------------------------------------------------*\
+| Maximum number of attempts to read from a device before failing. |
+\*----------------------------------------------------------------*/
+#define EVGA_PERIPHERAL_MAX_ATTEMPTS 100
+/*-----------------------------------------------------------------*\
+| The delay between sending packets to the device in wireless mode. |
+| In wireless mode, sending packets too close to each other causes  |
+| them to have no effect, despite the device responding properly.   |
+\*-----------------------------------------------------------------*/
+#define EVGA_PERIPHERAL_PACKET_DELAY std::chrono::milliseconds(10)
+
+/*--------------------------------------------------------------------------------*\
+| Returns true if both buffers have equal bytes at each position, false otherwise. |
+| Each buffer must be an array of bytes at least size bytes long.                  |
+\*--------------------------------------------------------------------------------*/
+static bool BuffersAreEqual(unsigned char *buffer1, unsigned char *buffer2, int size)
+{
+    for(int i = 0; i < size; i++)
+    {
+        if(buffer1[i] != buffer2[i])
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
+EVGAMouseController::EVGAMouseController(hid_device* dev_handle, char *_path, int connection_type)
+{
+    dev                     = dev_handle;
+    location                = _path;
+    this->connection_type   = connection_type;
+
+    const int szTemp = HID_MAX_STR;
+    wchar_t tmpName[szTemp];
+
+    hid_get_manufacturer_string(dev, tmpName, szTemp);
+    std::wstring wName  = std::wstring(tmpName);
+    device_name         = std::string(wName.begin(), wName.end());
+
+    hid_get_product_string(dev, tmpName, szTemp);
+    wName = std::wstring(tmpName);
+    device_name.append(" ").append(std::string(wName.begin(), wName.end()));
+
+    hid_get_indexed_string(dev, 2, tmpName, szTemp);
+    wName   = std::wstring(tmpName);
+    serial  = std::string(wName.begin(), wName.end());
+
+    led_states.resize(EVGA_PERIPHERAL_LED_COUNT);
+    for(EVGAMouseControllerDeviceState &led_state : led_states)
+    {
+        led_state.mode          = EVGA_PERIPHERAL_MODE_STATIC;
+        led_state.brightness    = 255;
+        led_state.speed         = 100;
+        led_state.colors.resize(1);
+        led_state.colors[0]     = ToRGBColor(255, 255, 255);
+    }
+}
+
+EVGAMouseController::~EVGAMouseController()
+{
+
+}
+
+std::string EVGAMouseController::GetDeviceName()
+{
+    return device_name;
+}
+
+std::string EVGAMouseController::GetSerial()
+{
+    return serial;
+}
+
+std::string EVGAMouseController::GetLocation()
+{
+    return location;
+}
+
+uint8_t EVGAMouseController::GetMode()
+{
+    return GetState().mode;
+}
+
+EVGAMouseControllerDeviceState EVGAMouseController::GetState()
+{
+    RefreshDeviceState(EVGA_PERIPHERAL_LED_SOURCE_OF_TRUTH);
+    return led_states[EVGA_PERIPHERAL_LED_SOURCE_OF_TRUTH];
+}
+
+RGBColor EVGAMouseController::GetColorOfLed(int led)
+{
+    RefreshDeviceState(led);
+    return led_states[led].colors[0];
+}
+
+void EVGAMouseController::SetMode(uint8_t mode, uint8_t index)
+{
+    unsigned char buffer[EVGA_PERIPHERAL_PACKET_SIZE] =
+    {
+        0x00,                   /* report id - must be 0x00 according to hid_send_feature_report */
+        0x00, 0x00, 0x00, 0x1D, /* header bits - always the same */
+        0x02, 0x81, 0x01        /* 0x81 sets the mode, which is specified below. */
+    };
+
+    buffer[EVGA_PERIPHERAL_LED_INDEX_BYTE]  = index;
+    buffer[EVGA_PERIPHERAL_MODE_BYTE]       = mode;
+    int err                                 = hid_send_feature_report(dev, buffer, EVGA_PERIPHERAL_PACKET_SIZE);
+    if(err == -1)
+    {
+        const wchar_t* err_str = hid_error(dev);
+        LOG_DEBUG("[%s] Error writing buffer %s", device_name.c_str(), err_str);
+    }
+    led_states[index].mode  = mode;
+    err                     = hid_get_feature_report(dev, buffer, EVGA_PERIPHERAL_PACKET_SIZE);
+    if(err == -1)
+    {
+        const wchar_t* err_str = hid_error(dev);
+        LOG_DEBUG("[%s] Error reading buffer %s", device_name.c_str(), err_str);
+    }
+}
+
+void EVGAMouseController::SetLed(uint8_t index, uint8_t brightness, uint8_t speed, RGBColor color)
+{
+    SetLed(index, brightness, speed, std::vector({color}), false);
+}
+
+void EVGAMouseController::SetLed(uint8_t index, uint8_t brightness, uint8_t speed, const std::vector<RGBColor>& colors)
+{
+    SetLed(index, brightness, speed, colors, false);
+}
+
+void EVGAMouseController::SetLedAndActivate(uint8_t index, uint8_t brightness, uint8_t speed, const std::vector<RGBColor>& colors)
+{
+    /*------------------------------------------------------------------------------------------------------------------------------*\
+    | Activating some modes requires two identical packets: one for setting the color, and one for setting the color AND activating. |
+    \*------------------------------------------------------------------------------------------------------------------------------*/
+    SetLed(index, brightness, speed, colors, false);
+    SetLed(index, brightness, speed, colors, true);
+}
+
+void EVGAMouseController::SetAllLeds(uint8_t brightness, uint8_t speed, const std::vector<RGBColor>& colors)
+{
+    for(unsigned int i = 0; i < EVGA_PERIPHERAL_LED_COUNT; i++)
+    {
+        SetLed(i, brightness, speed, colors);
+    }
+}
+
+void EVGAMouseController::SetAllLedsAndActivate(uint8_t brightness, uint8_t speed, const std::vector<RGBColor>& colors)
+{
+    for(unsigned int i = 0; i < EVGA_PERIPHERAL_LED_COUNT; i++)
+    {
+        SetLedAndActivate(i, brightness, speed, colors);
+    }
+}
+
+void EVGAMouseController::SetLed(uint8_t index, uint8_t brightness, uint8_t speed, const std::vector<RGBColor>& colors, bool activate)
+{
+    unsigned char buffer[EVGA_PERIPHERAL_PACKET_SIZE] =
+    {
+        0x00,               /* report id - must be 0x00 according to hid_send_feature_report */
+        0x00, 0x00, static_cast<unsigned char>(connection_type), 0x1D,
+        0x02, 0x00, 0x02    /* header bits - always the same */
+    };
+
+    /*---------------------------------------------------------------------------------------------------------------*\
+    | Setting the mode to breathing sends 3 packets: first to activate the mode, second to set the list of colors and |
+    | third to send a packet identical to the second but with the first byte set ot 0xA1. This "activates" the mode.  |
+    \*---------------------------------------------------------------------------------------------------------------*/
+    if(activate)
+    {
+        buffer[1] = 0xA1;
+    }
+
+    buffer[EVGA_PERIPHERAL_LED_INDEX_BYTE]  = index;
+    /*-----------------------------------------------------------------------------------------*\
+    | Unleash RGB supports individual modes on the LEDs, but OpenRGB does not. Use one specific |
+    | LED's mode for any LED.                                                                   |
+    \*-----------------------------------------------------------------------------------------*/
+    buffer[EVGA_PERIPHERAL_MODE_BYTE]       = led_states[EVGA_PERIPHERAL_LED_SOURCE_OF_TRUTH].mode;
+    buffer[EVGA_PERIPHERAL_BRIGHTNESS_BYTE] = brightness;
+    buffer[EVGA_PERIPHERAL_SPEED_BYTE]      = speed;
+
+    /*-----------------------------------------------------------------------*\
+    | 7 is the maximum number of colors that can be set from the vendor's UI. |
+    \*-----------------------------------------------------------------------*/
+    unsigned char color_count                   = std::min(colors.size(), static_cast<std::vector<RGBColor>::size_type>(7));
+    buffer[EVGA_PERIPHERAL_COLOR_COUNT_BYTE]    = color_count;
+    for(unsigned char i = 0; i < color_count; i++)
+    {
+        buffer[15 + i * 3] = RGBGetRValue(colors[i]);
+        buffer[16 + i * 3] = RGBGetGValue(colors[i]);
+        buffer[17 + i * 3] = RGBGetBValue(colors[i]);
+    }
+    int err = hid_send_feature_report(dev, buffer, EVGA_PERIPHERAL_PACKET_SIZE);
+    if(err == -1)
+    {
+        const wchar_t* err_str = hid_error(dev);
+        LOG_DEBUG("[%s] Error writing buffer %s", device_name.c_str(), err_str);
+    }
+    led_states[index].brightness    = brightness;
+    led_states[index].speed         = speed;
+    led_states[index].colors        = colors;
+    /*------------------------------------------------------------------------------------*\
+    | If the device returns a response not ready packet, future writes will silently fail. |
+    | Wait until the device sends a valid packet to proceed.                               |
+    \*------------------------------------------------------------------------------------*/
+    ReadPacketOrLogErrors(buffer, EVGA_PERIPHERAL_MAX_ATTEMPTS);
+}
+
+void EVGAMouseController::RefreshDeviceState()
+{
+    RefreshDeviceState(EVGA_PERIPHERAL_LED_FRONT);
+    RefreshDeviceState(EVGA_PERIPHERAL_LED_WHEEL);
+    RefreshDeviceState(EVGA_PERIPHERAL_LED_LOGO);
+}
+
+void EVGAMouseController::RefreshDeviceState(int led)
+{
+    unsigned char buffer[EVGA_PERIPHERAL_PACKET_SIZE] =
+    {
+        0x00,
+        0x00, 0x00, static_cast<unsigned char>(connection_type), 0x1D,
+        0x02, 0x80, 0x02
+    };
+    buffer[EVGA_PERIPHERAL_LED_INDEX_BYTE]  = static_cast<unsigned char>(led);
+    int err                                 = hid_send_feature_report(dev, buffer, EVGA_PERIPHERAL_PACKET_SIZE);
+    if(err == -1)
+    {
+        const wchar_t* err_str = hid_error(dev);
+        LOG_DEBUG("[%s] Error writing buffer %s", device_name.c_str(), err_str);
+    }
+    /*------------------------------------------------------------------------------*\
+    | Wait in wireless mode or else packets might be sent too quickly to take effect |
+    \*------------------------------------------------------------------------------*/
+    Wait();
+    if(ReadPacketOrLogErrors(buffer, EVGA_PERIPHERAL_MAX_ATTEMPTS))
+    {
+        int color_count = buffer[EVGA_PERIPHERAL_COLOR_COUNT_BYTE];
+        if(color_count == 0)
+        {
+            LOG_VERBOSE("[%s] No colors read from response. The device is likely asleep.", device_name.c_str());
+            return;
+        }
+        led_states[led].mode        = buffer[EVGA_PERIPHERAL_MODE_BYTE];
+        led_states[led].brightness  = buffer[EVGA_PERIPHERAL_BRIGHTNESS_BYTE];
+        led_states[led].speed       = buffer[EVGA_PERIPHERAL_SPEED_BYTE];
+        led_states[led].colors.resize(std::max(color_count, 1));
+        for(int i = 0; i < color_count; i++)
+        {
+            uint8_t r                   = buffer[EVGA_PERIPHERAL_RED_BYTE + i * 3];
+            uint8_t g                   = buffer[EVGA_PERIPHERAL_GREEN_BYTE + i * 3];
+            uint8_t b                   = buffer[EVGA_PERIPHERAL_BLUE_BYTE + i * 3];
+            led_states[led].colors[i]   = ToRGBColor(r, g, b);
+        }
+    }
+}
+
+bool EVGAMouseController::ReadPacketOrLogErrors(unsigned char *buffer, int max_attempts)
+{
+    int bytes_read = ReadPacketOrWait(buffer, max_attempts);
+    if(bytes_read == -1)
+    {
+        const wchar_t* err_str = hid_error(dev);
+        LOG_DEBUG("[%s] Error reading buffer %s", device_name.c_str(), err_str);
+        return false;
+    }
+    else if(IsResponseNotReadyPacket(buffer))
+    {
+        LOG_VERBOSE("[%s] Retries exhausted reading from device. Write may have failed.", device_name.c_str());
+        return false;
+    }
+    else if(IsAsleepPacket(buffer))
+    {
+        LOG_VERBOSE("[%s] Device is asleep. Cannot send or receive packets until the device is awoken.", device_name.c_str());
+        return false;
+    }
+    return true;
+}
+
+int EVGAMouseController::ReadPacketOrWait(unsigned char *buffer, int max_attempts)
+{
+    int attempts    = 1;
+    Wait();
+    int bytes_read  = hid_get_feature_report(dev, buffer, EVGA_PERIPHERAL_PACKET_SIZE);
+    while(bytes_read == EVGA_PERIPHERAL_PACKET_SIZE && attempts < max_attempts && IsResponseNotReadyPacket(buffer))
+    {
+        Wait();
+        bytes_read = hid_get_feature_report(dev, buffer, EVGA_PERIPHERAL_PACKET_SIZE);
+        attempts++;
+    }
+    return bytes_read;
+}
+
+void EVGAMouseController::Wait()
+{
+    if(connection_type == EVGA_PERIPHERAL_CONNECTION_TYPE_WIRELESS)
+    {
+        std::this_thread::sleep_for(EVGA_PERIPHERAL_PACKET_DELAY);
+    }
+}
+
+bool EVGAMouseController::IsAsleepPacket(unsigned char *buffer)
+{
+    const int expected_packet_size = 8;
+    unsigned char expected_buffer[expected_packet_size] =
+    {
+        0x00,
+        0xA4, 0x00, 0x02, 0x1D,
+        0x02, 0x80, 0x02
+    };
+    return BuffersAreEqual(buffer, expected_buffer, expected_packet_size);
+}
+
+bool EVGAMouseController::IsResponseNotReadyPacket(unsigned char *buffer)
+{
+    const int expected_packet_size = 8;
+    unsigned char expected_buffer[expected_packet_size] =
+    {
+        0x00,
+        0xA0, 0x00, 0x02, 0x1D,
+        0x02, 0x80, 0x02
+    };
+    return BuffersAreEqual(buffer, expected_buffer, expected_packet_size);
+}
+