| Alex Vakulenko | e4eec20 | 2017-01-27 14:41:04 -0800 | [diff] [blame^] | 1 | #include "VirtualTouchpad.h" |
| 2 | |
| 3 | #include <cutils/log.h> |
| 4 | #include <inttypes.h> |
| 5 | #include <linux/input.h> |
| 6 | |
| 7 | namespace android { |
| 8 | namespace dvr { |
| 9 | |
| 10 | namespace { |
| 11 | |
| 12 | // Virtual evdev device properties. |
| 13 | static const char* const kDeviceName = "vr window manager virtual touchpad"; |
| 14 | static constexpr int16_t kDeviceBusType = BUS_VIRTUAL; |
| 15 | static constexpr int16_t kDeviceVendor = 0x18D1; // Google USB vendor ID. |
| 16 | static constexpr int16_t kDeviceProduct = 0x5652; // 'VR' |
| 17 | static constexpr int16_t kDeviceVersion = 0x0001; |
| 18 | static constexpr int32_t kWidth = 0x10000; |
| 19 | static constexpr int32_t kHeight = 0x10000; |
| 20 | static constexpr int32_t kSlots = 2; |
| 21 | |
| 22 | } // anonymous namespace |
| 23 | |
| 24 | int VirtualTouchpad::Initialize() { |
| 25 | if (!injector_) { |
| 26 | owned_injector_.reset(new EvdevInjector()); |
| 27 | injector_ = owned_injector_.get(); |
| 28 | } |
| 29 | injector_->ConfigureBegin(kDeviceName, kDeviceBusType, kDeviceVendor, |
| 30 | kDeviceProduct, kDeviceVersion); |
| 31 | injector_->ConfigureInputProperty(INPUT_PROP_DIRECT); |
| 32 | injector_->ConfigureMultiTouchXY(0, 0, kWidth - 1, kHeight - 1); |
| 33 | injector_->ConfigureAbsSlots(kSlots); |
| 34 | injector_->ConfigureKey(BTN_TOUCH); |
| 35 | injector_->ConfigureEnd(); |
| 36 | return injector_->GetError(); |
| 37 | } |
| 38 | |
| 39 | int VirtualTouchpad::Touch(float x, float y, float pressure) { |
| 40 | int error = 0; |
| 41 | int32_t device_x = x * kWidth; |
| 42 | int32_t device_y = y * kHeight; |
| 43 | touches_ = ((touches_ & 1) << 1) | (pressure > 0); |
| 44 | ALOGV("(%f,%f) %f -> (%" PRId32 ",%" PRId32 ") %d", |
| 45 | x, y, pressure, device_x, device_y, touches_); |
| 46 | |
| 47 | injector_->ResetError(); |
| 48 | switch (touches_) { |
| 49 | case 0b00: // Hover continues. |
| 50 | if (device_x != last_device_x_ || device_y != last_device_y_) { |
| 51 | injector_->SendMultiTouchXY(0, 0, device_x, device_y); |
| 52 | injector_->SendSynReport(); |
| 53 | } |
| 54 | break; |
| 55 | case 0b01: // Touch begins. |
| 56 | // Press. |
| 57 | injector_->SendMultiTouchXY(0, 0, device_x, device_y); |
| 58 | injector_->SendKey(BTN_TOUCH, EvdevInjector::KEY_PRESS); |
| 59 | injector_->SendSynReport(); |
| 60 | break; |
| 61 | case 0b10: // Touch ends. |
| 62 | injector_->SendKey(BTN_TOUCH, EvdevInjector::KEY_RELEASE); |
| 63 | injector_->SendMultiTouchLift(0); |
| 64 | injector_->SendSynReport(); |
| 65 | break; |
| 66 | case 0b11: // Touch continues. |
| 67 | if (device_x != last_device_x_ || device_y != last_device_y_) { |
| 68 | injector_->SendMultiTouchXY(0, 0, device_x, device_y); |
| 69 | injector_->SendSynReport(); |
| 70 | } |
| 71 | break; |
| 72 | } |
| 73 | last_device_x_ = device_x; |
| 74 | last_device_y_ = device_y; |
| 75 | |
| 76 | return injector_->GetError(); |
| 77 | } |
| 78 | |
| 79 | } // namespace dvr |
| 80 | } // namespace android |