From e60fa7740cd7d245d1b22a25fea9df0768d32668 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Sun, 19 May 2024 04:34:40 -0400
Subject: mouse support (working in qemu, semi-working in virtualbox)

---
 kernel/source/interrupts.cpp | 49 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 47 insertions(+), 2 deletions(-)

(limited to 'kernel/source/interrupts.cpp')

diff --git a/kernel/source/interrupts.cpp b/kernel/source/interrupts.cpp
index 6e22121..9b6495e 100644
--- a/kernel/source/interrupts.cpp
+++ b/kernel/source/interrupts.cpp
@@ -1,3 +1,4 @@
+#include <hilbert/kernel/framebuffer.hpp>
 #include <hilbert/kernel/input.hpp>
 #include <hilbert/kernel/panic.hpp>
 
@@ -54,7 +55,9 @@ static uint32_t current_flags = 0;
 
 static void got_key(uint32_t key) {
 
-  input::key_queue->insert(current_flags | key);
+  input::input_queue->insert({
+    .keyboard = current_flags | key, .is_mouse = false});
+
   input::got_input();
 
   if (key == (input::BREAK | 0x77))
@@ -90,7 +93,7 @@ static void got_key(uint32_t key) {
 }
 
 static uint8_t key_so_far[8];
-uint8_t key_so_far_len = 0;
+static uint8_t key_so_far_len = 0;
 
 extern "C" void on_keyboard_interrupt(uint8_t byte) {
 
@@ -150,3 +153,45 @@ extern "C" void on_keyboard_interrupt(uint8_t byte) {
   }
 
 }
+
+static uint8_t mouse_packet_so_far[3];
+static uint8_t mouse_packet_so_far_len = 0;
+
+extern "C" void on_mouse_interrupt(uint8_t byte) {
+
+  if (mouse_packet_so_far_len == 0 && byte == 0xfa)
+    //dirty hack
+    return;
+
+  mouse_packet_so_far[mouse_packet_so_far_len++] = byte;
+  if (mouse_packet_so_far_len < 3)
+    return;
+
+  mouse_packet_so_far_len = 0;
+
+  int16_t x_change = mouse_packet_so_far[1];
+  int16_t y_change = -(int16_t)mouse_packet_so_far[2];
+  if (mouse_packet_so_far[0] & 0x10)
+    x_change -= 0x100;
+  if (mouse_packet_so_far[0] & 0x20)
+    y_change += 0x100;
+
+  input::input_packet packet = {
+    .mouse = {
+      .x_change = x_change, .y_change = y_change,
+      .buttons = (input::buttons_t)(mouse_packet_so_far[0] & 7) },
+    .is_mouse = true };
+
+  if (input::input_queue->count > 0 &&
+      input::input_queue->last_inserted().is_mouse &&
+      input::input_queue->last_inserted().mouse.buttons ==
+      packet.mouse.buttons) {
+    input::input_queue->last_inserted().mouse.x_change = packet.mouse.x_change;
+    input::input_queue->last_inserted().mouse.y_change = packet.mouse.y_change;
+  }
+  else
+    input::input_queue->insert(packet);
+
+  input::got_input();
+
+}
-- 
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