From 10085b9b36408b66926ede15052fcc98efb3b751 Mon Sep 17 00:00:00 2001
From: Simon Garrelou <simon.garrelou@gmail.com>
Date: Sat, 9 Jan 2021 23:44:48 +0100
Subject: Fix keys input: the game is now theoretically finishable

---
 README.md            |  7 ++++---
 src/KINDLE/i_video.c | 14 ++++++++++++--
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index feb9548..f77fc03 100644
--- a/README.md
+++ b/README.md
@@ -16,10 +16,11 @@ Prerequisites: copy your `doom.wad` and `prboom.wad` to the root of your Kindle
 The controls are as follows:
 - Keypad to move
 - "OK" button to shoot
+- "Menu" to open doors / activate switches
+- "Back" to toggle the menu (mapped to Escape)
+- "Keyboard" to select an entry in the menu (mapped to Enter)
 - "Home" button to quit
 
-There's no "Use" key, because I haven't totally figured out how the other buttons work yet.
-
 ## Compilation
 
 If you want to build the project for yourself, you will need an `armv7` GCC toolchain. I successfully used Bootlin's [`armv7-eabihf`](https://toolchains.bootlin.com/releases_armv7-eabihf.html) "musl" toolchain. Compiling with the glibc toolchain also works, but the `libc` on the Kindle is too old and it will refuse to start.
@@ -37,7 +38,7 @@ Based on [`prboom-2.5.0`](https://sourceforge.net/projects/prboom/files/prboom%2
 
 The main change is the addition of `src/KINDLE/`, which defines most Kindle-specific functions. I basically copied `src/SDL/` and modified everything to remove dependencies on SDL and instead work directly on the Kindle's framebuffer.
 
-Resolution is hardcoded to 600x800 and cannot be changed.
+Resolution is hardcoded to 800x600 widescreen and cannot be changed.
 
 I removed all the autoconf stuff and wrote a Makefile by hand.
 
diff --git a/src/KINDLE/i_video.c b/src/KINDLE/i_video.c
index b379f97..5672b28 100644
--- a/src/KINDLE/i_video.c
+++ b/src/KINDLE/i_video.c
@@ -133,6 +133,8 @@ static void init_kindle_keys() {
   }
 }
 
+#define KINDLE_READ_AGAIN 4
+
 static int kindle_poll_keys(kindle_key_t *k) {
     int retval = read(kindleKeysFd, k, sizeof(kindle_key_t));
     if (retval == -1) {
@@ -152,6 +154,10 @@ static int kindle_poll_keys(kindle_key_t *k) {
         perror("read()");
         exit(1);
       }
+    } else if (k->keyCode == KINDLE_READ_AGAIN) {
+      printf("Read again\n");
+      read(kindleKeysFd2, k, sizeof(kindle_key_t));
+      return 1;
     } else if (retval > 0)  {
       return 1;
     }
@@ -179,10 +185,11 @@ static boolean mouse_currently_grabbed;
 #define KINDLE_RIGHT 106
 #define KINDLE_UP 103
 #define KINDLE_DOWN 108
-#define KINDE_OK 194
+#define KINDLE_OK 194
 #define KINDLE_HOME 102
 #define KINDLE_MENU 139
 #define KINDLE_BACK 158
+#define KINDLE_KEYBOARD 29
 
 static int I_TranslateKey(unsigned short code)
 {
@@ -193,7 +200,10 @@ static int I_TranslateKey(unsigned short code)
     case KINDLE_RIGHT: rc = KEYD_UPARROW; break;
     case KINDLE_UP: rc = KEYD_LEFTARROW; break;
     case KINDLE_DOWN: rc = KEYD_RIGHTARROW; break;
-    case KINDE_OK: rc = KEYD_RCTRL; break;
+    case KINDLE_OK: rc = KEYD_RCTRL; break;
+    case KINDLE_BACK: rc = KEYD_ESCAPE; break;
+    case KINDLE_MENU: rc = KEYD_ENTER; break;
+    case KINDLE_KEYBOARD: rc = KEYD_SPACEBAR; break;
     default: break;
   }
 
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