Fix incorrect scaling for absolute mouse coordinates

sunshine/input.cpp

@@ -46,10 +46,6 @@ void free_id(std::bitset<N> &gamepad_mask, int id) {
   gamepad_mask[id] = false;
 }
 
-platf::touch_port_t touch_port {
-  0, 0, 0, 0
-};
-
 static util::TaskPool::task_id_t task_id {};
 static std::unordered_map<short, bool> key_press {};
 static std::array<std::uint8_t, 5> mouse_press {};
@@ -88,15 +84,21 @@ struct gamepad_t {
 };
 
 struct input_t {
-  input_t(safe::mail_raw_t::event_t<platf::touch_port_t> touch_port_event)
+  input_t(safe::mail_raw_t::event_t<input::touch_port_t> touch_port_event)
-      : active_gamepad_state {}, gamepads(MAX_GAMEPADS), touch_port_event { std::move(touch_port_event) }, mouse_left_button_timeout {} {}
+      : active_gamepad_state {},
+        gamepads(MAX_GAMEPADS),
+        touch_port_event { std::move(touch_port_event) },
+        mouse_left_button_timeout {},
+        touch_port { 0, 0, 0, 0, 0, 0, 1.0f } {}
 
   std::uint16_t active_gamepad_state;
   std::vector<gamepad_t> gamepads;
 
-  safe::mail_raw_t::event_t<platf::touch_port_t> touch_port_event;
+  safe::mail_raw_t::event_t<input::touch_port_t> touch_port_event;
 
   util::ThreadPool::task_id_t mouse_left_button_timeout;
+
+  input::touch_port_t touch_port;
 };
 
 using namespace std::literals;
@@ -204,6 +206,7 @@ void passthrough(std::shared_ptr<input_t> &input, PNV_ABS_MOUSE_MOVE_PACKET pack
   }
 
   auto &touch_port_event = input->touch_port_event;
+  auto &touch_port       = input->touch_port;
   if(touch_port_event->peek()) {
     touch_port = *touch_port_event->pop();
   }
@@ -233,7 +236,7 @@ void passthrough(std::shared_ptr<input_t> &input, PNV_ABS_MOUSE_MOVE_PACKET pack
     touch_port.env_width, touch_port.env_height
   };
 
-  platf::abs_mouse(platf_input, abs_port, x - offsetX, y - offsetY); //touch_port, x * scale_x + offsetX, y * scale_y + offsetY);
+  platf::abs_mouse(platf_input, abs_port, (x - offsetX) * touch_port.scalar_inv, (y - offsetY) * touch_port.scalar_inv);
 }
 
 void passthrough(std::shared_ptr<input_t> &input, PNV_MOUSE_BUTTON_PACKET packet) {
@@ -567,7 +570,7 @@ void init() {
 }
 
 std::shared_ptr<input_t> alloc(safe::mail_t mail) {
-  auto input = std::make_shared<input_t>(mail->event<platf::touch_port_t>(mail::touch_port));
+  auto input = std::make_shared<input_t>(mail->event<input::touch_port_t>(mail::touch_port));
 
   // Workaround to ensure new frames will be captured when a client connects
   task_pool.pushDelayed([]() {

sunshine/input.h

@@ -7,6 +7,7 @@
 
 #include "platform/common.h"
 #include "thread_safe.h"
+
 namespace input {
 
 struct input_t;
@@ -19,6 +20,13 @@ void passthrough(std::shared_ptr<input_t> &input, std::vector<std::uint8_t> &&in
 void init();
 
 std::shared_ptr<input_t> alloc(safe::mail_t mail);
+
+struct touch_port_t : public platf::touch_port_t {
+  int env_width, env_height;
+
+  // inverse of scalar used for aspect ratio
+  float scalar_inv;
+};
 } // namespace input
 
 #endif //SUNSHINE_INPUT_H

sunshine/platform/common.h

@@ -106,8 +106,6 @@ inline std::string_view from_pix_fmt(pix_fmt_e pix_fmt) {
 // Dimensions for touchscreen input
 struct touch_port_t {
   int offset_x, offset_y;
-  int env_width, env_height;
-
   int width, height;
 };
 

sunshine/platform/linux/input.cpp

@@ -145,8 +145,8 @@ public:
 void abs_mouse(input_t &input, const touch_port_t &touch_port, float x, float y) {
   auto touchscreen = ((input_raw_t *)input.get())->touch_input.get();
 
-  auto scaled_x = (int)std::lround((x + touch_port.offset_x) * ((float)target_touch_port.env_width / (float)touch_port.env_width));
+  auto scaled_x = (int)std::lround((x + touch_port.offset_x) * ((float)target_touch_port.width / (float)touch_port.width));
-  auto scaled_y = (int)std::lround((y + touch_port.offset_y) * ((float)target_touch_port.env_height / (float)touch_port.env_height));
+  auto scaled_y = (int)std::lround((y + touch_port.offset_y) * ((float)target_touch_port.height / (float)touch_port.height));
 
   libevdev_uinput_write_event(touchscreen, EV_ABS, ABS_X, scaled_x);
   libevdev_uinput_write_event(touchscreen, EV_ABS, ABS_Y, scaled_y);
@@ -470,7 +470,7 @@ evdev_t touchscreen() {
   input_absinfo absx {
     0,
     0,
-    target_touch_port.env_width,
+    target_touch_port.width,
     1,
     0,
     28
@@ -479,7 +479,7 @@ evdev_t touchscreen() {
   input_absinfo absy {
     0,
     0,
-    target_touch_port.env_height,
+    target_touch_port.height,
     1,
     0,
     28

sunshine/platform/windows/input.cpp

@@ -123,8 +123,8 @@ void abs_mouse(input_t &input, const touch_port_t &touch_port, float x, float y)
     // MOUSEEVENTF_VIRTUALDESK maps to the entirety of the desktop rather than the primary desktop
     MOUSEEVENTF_VIRTUALDESK;
 
-  auto scaled_x = std::lround((x + touch_port.offset_x) * ((float)target_touch_port.env_width / (float)touch_port.env_width));
+  auto scaled_x = std::lround((x + touch_port.offset_x) * ((float)target_touch_port.width / (float)touch_port.width));
-  auto scaled_y = std::lround((y + touch_port.offset_y) * ((float)target_touch_port.env_height / (float)touch_port.env_height));
+  auto scaled_y = std::lround((y + touch_port.offset_y) * ((float)target_touch_port.height / (float)touch_port.height));
 
   mi.dx = scaled_x;
   mi.dy = scaled_y;

sunshine/video.cpp

@@ -12,6 +12,7 @@ extern "C" {
 
 #include "cbs.h"
 #include "config.h"
+#include "input.h"
 #include "main.h"
 #include "platform/common.h"
 #include "round_robin.h"
@@ -353,7 +354,7 @@ struct sync_session_ctx_t {
   safe::mail_raw_t::event_t<bool> shutdown_event;
   safe::mail_raw_t::queue_t<packet_t> packets;
   safe::mail_raw_t::event_t<idr_t> idr_events;
-  safe::mail_raw_t::event_t<platf::touch_port_t> touch_port_events;
+  safe::mail_raw_t::event_t<input::touch_port_t> touch_port_events;
 
   config_t config;
   int frame_nr;
@@ -1061,7 +1062,7 @@ void encode_run(
   }
 }
 
-platf::touch_port_t make_port(platf::display_t *display, const config_t &config) {
+input::touch_port_t make_port(platf::display_t *display, const config_t &config) {
   float wd = display->width;
   float hd = display->height;
 
@@ -1073,13 +1074,14 @@ platf::touch_port_t make_port(platf::display_t *display, const config_t &config)
   auto w2 = scalar * wd;
   auto h2 = scalar * hd;
 
-  return platf::touch_port_t {
+  return input::touch_port_t {
     display->offset_x,
     display->offset_y,
-    display->env_width,
-    display->env_height,
     (int)w2,
     (int)h2,
+    display->env_width,
+    display->env_height,
+    1.0f / scalar,
   };
 }
 
@@ -1315,7 +1317,7 @@ void capture_async(
   int frame_nr     = 1;
   int key_frame_nr = 1;
 
-  auto touch_port_event = mail->event<platf::touch_port_t>(mail::touch_port);
+  auto touch_port_event = mail->event<input::touch_port_t>(mail::touch_port);
 
   while(!shutdown_event->peek() && images->running()) {
     // Wait for the main capture event when the display is being reinitialized
@@ -1379,7 +1381,7 @@ void capture(
       mail->event<bool>(mail::shutdown),
       mail::man->queue<packet_t>(mail::video_packets),
       std::move(idr_events),
-      mail->event<platf::touch_port_t>(mail::touch_port),
+      mail->event<input::touch_port_t>(mail::touch_port),
       config,
       1,
       1,