From 20453016f9d38324961087b62f38145a455e409a Mon Sep 17 00:00:00 2001
From: neonloop
Date: Tue, 10 Aug 2021 14:55:06 +0000
Subject: Adds vertical mode to mame2000

---
 patches/mame2000/1004-rotation.patch | 75 ++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 patches/mame2000/1004-rotation.patch

(limited to 'patches')

diff --git a/patches/mame2000/1004-rotation.patch b/patches/mame2000/1004-rotation.patch
new file mode 100644
index 0000000..f28b452
--- /dev/null
+++ b/patches/mame2000/1004-rotation.patch
@@ -0,0 +1,75 @@
+diff --git a/src/libretro/libretro.c b/src/libretro/libretro.c
+index aad93bc..2f37f52 100644
+--- a/src/libretro/libretro.c
++++ b/src/libretro/libretro.c
+@@ -68,6 +68,8 @@ int should_skip_frame                    = 0;
+ static int sample_rate                   = 32000;
+ static int stereo_enabled                = true;
+ 
++static int rotate                        = false;
++
+ int game_index = -1;
+ unsigned short *gp2x_screen15;
+ int thread_done = 0;
+@@ -296,6 +298,19 @@ static void update_variables(bool first_run)
+     else
+         stereo_enabled = true;
+ 
++    var.value = NULL;
++    var.key = "mame2000-rotate";
++
++    if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
++    {
++        if(strcmp(var.value, "enabled") == 0)
++            rotate = true;
++        else
++            rotate = false;
++    }
++    else
++        rotate = false;
++
+    /* Reinitialise frameskipping, if required */
+    if (!first_run &&
+        ((frameskip_type     != prev_frameskip_type)))
+@@ -312,6 +327,7 @@ void retro_set_environment(retro_environment_t cb)
+       { "mame2000-show_gameinfo", "Show Game Info; disabled|enabled" },
+       { "mame2000-sample_rate", "Snd. Rate (Restart); 11025|22050|32000|44100" },
+       { "mame2000-stereo", "Stereo (Restart); disabled|enabled" },
++      { "mame2000-rotate", "Rotate (Restart); disabled|enabled" },
+       { NULL, NULL },
+    };
+    environ_cb = cb;
+@@ -378,10 +394,17 @@ static void update_input(void)
+ 
+ 		key[KEY_1 + i]   |= JS(i, START);
+ 		key[KEY_5 + i]   |= JS(i, SELECT);
+-		joy_pressed[c++] = JS(i, LEFT);
+-		joy_pressed[c++] = JS(i, RIGHT);
+-		joy_pressed[c++] = JS(i, UP);
+-		joy_pressed[c++] = JS(i, DOWN);
++		if (rotate_controls) {
++			joy_pressed[c++] = JS(i, UP);
++			joy_pressed[c++] = JS(i, DOWN);
++			joy_pressed[c++] = JS(i, RIGHT);
++			joy_pressed[c++] = JS(i, LEFT);
++		} else {
++			joy_pressed[c++] = JS(i, LEFT);
++			joy_pressed[c++] = JS(i, RIGHT);
++			joy_pressed[c++] = JS(i, UP);
++			joy_pressed[c++] = JS(i, DOWN);
++		}
+ 		joy_pressed[c++] = JS(i, B);
+ 		joy_pressed[c++] = JS(i, A);
+ 		joy_pressed[c++] = JS(i, Y);
+@@ -911,6 +934,11 @@ bool retro_load_game(const struct retro_game_info *info)
+    options.samplerate = sample_rate;
+    usestereo = stereo_enabled;
+ 
++   if (rotate) {
++      options.ror = 1;
++      rotate_controls = 1;
++   }
++
+    /* This is needed so emulated YM3526/YM3812 chips are used instead on physical ones. */
+    options.use_emulated_ym3812 = 1;
+ 
-- 
cgit v1.2.3