From 946f9a742d9ed5ff96fb3c2fb96b6c7342565453 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Mon, 23 Apr 2012 01:53:40 -0400
Subject: [PATCH] Handle implicit declaration of ps_1_1 v# registers.

---
 mojoshader.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/mojoshader.c b/mojoshader.c
index 58fa462f..388a0e8d 100644
--- a/mojoshader.c
+++ b/mojoshader.c
@@ -9077,6 +9077,17 @@ static void process_definitions(Context *ctx)
                     item = prev;
                     break;
 
+                case REG_TYPE_INPUT:
+                    // You don't have to dcl_ your inputs in Shader Model 1.
+                    if (shader_is_pixel(ctx)&&!shader_version_atleast(ctx,2,0))
+                    {
+                        add_attribute_register(ctx, regtype, regnum,
+                                               MOJOSHADER_USAGE_COLOR, regnum,
+                                               0xF, 0);
+                        break;
+                    } // if
+                    // fall through...
+
                 default:
                     fail(ctx, "BUG: we used a register we don't know how to define.");
             } // switch