Merge pull request #55 from jSTE0/config-transparency

Make transparency effects configurable

libretro/libretro.c

@@ -597,6 +597,15 @@ static void check_variables(bool first_run)
    if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
       frameskip_interval = strtol(var.value, NULL, 10);
 
+   var.key = "snes9x2002_transparency";
+   var.value = NULL;
+
+   Settings.Transparency = true;
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
+      if (strcmp(var.value, "disabled") == 0)
+         Settings.Transparency = false;
+
    var.key = "snes9x2002_low_pass_filter";
    var.value = NULL;
 

libretro/libretro_core_options.h

@@ -121,6 +121,20 @@ struct retro_core_option_v2_definition option_defs_us[] = {
       },
       "1"
    },
+   {
+      "snes9x2002_transparency",
+      "Transparency Effects",
+      NULL,
+      "Disable to improve frame rate at the expense of rendering accuracy.",
+      NULL,
+      NULL,
+      {
+         { "disabled", NULL },
+         { "enabled",  NULL },
+         { NULL, NULL },
+      },
+      "enabled"
+   },
    {
       "snes9x2002_low_pass_filter",
       "Audio Filter",