wined3d: Add a setting to check relative addressing indices when accessing uniforms.

dlls/wined3d/glsl_shader.c

@@ -2257,7 +2257,12 @@ static void shader_glsl_get_register_name(const struct wined3d_shader_register *
                 /* Relative addressing */
                 if (reg->idx[0].rel_addr)
                 {
-                    if (reg->idx[0].offset)
+                    if (wined3d_settings.check_float_constants)
+                        sprintf(register_name, "(%s + %u >= 0 && %s + %u < %u ? %s_c[%s + %u] : vec4(0.0))",
+                                rel_param0.param_str, reg->idx[0].offset,
+                                rel_param0.param_str, reg->idx[0].offset, shader->limits->constant_float,
+                                prefix, rel_param0.param_str, reg->idx[0].offset);
+                    else if (reg->idx[0].offset)
                         sprintf(register_name, "%s_c[%s + %u]", prefix, rel_param0.param_str, reg->idx[0].offset);
                     else
                         sprintf(register_name, "%s_c[%s]", prefix, rel_param0.param_str);

dlls/wined3d/wined3d_main.c

@@ -82,6 +82,7 @@ struct wined3d_settings wined3d_settings =
     TRUE,           /* Multisampling enabled by default. */
     FALSE,          /* No strict draw ordering. */
     TRUE,           /* Don't try to render onscreen by default. */
+    FALSE,          /* Don't range check relative addressing indices in float constants. */
     ~0U,            /* No VS shader model limit by default. */
     ~0U,            /* No GS shader model limit by default. */
     ~0U,            /* No PS shader model limit by default. */
@@ -302,6 +303,12 @@ static BOOL wined3d_dll_init(HINSTANCE hInstDLL)
             TRACE("Not always rendering backbuffers offscreen.\n");
             wined3d_settings.always_offscreen = FALSE;
         }
+        if (!get_config_key(hkey, appkey, "CheckFloatConstants", buffer, size)
+                && !strcmp(buffer, "enabled"))
+        {
+            TRACE("Checking relative addressing indices in float constants.\n");
+            wined3d_settings.check_float_constants = TRUE;
+        }
         if (!get_config_key_dword(hkey, appkey, "MaxShaderModelVS", &wined3d_settings.max_sm_vs))
             TRACE("Limiting VS shader model to %u.\n", wined3d_settings.max_sm_vs);
         if (!get_config_key_dword(hkey, appkey, "MaxShaderModelGS", &wined3d_settings.max_sm_gs))

dlls/wined3d/wined3d_private.h

@@ -290,6 +290,7 @@ struct wined3d_settings
     int allow_multisampling;
     BOOL strict_draw_ordering;
     BOOL always_offscreen;
+    BOOL check_float_constants;
     unsigned int max_sm_vs;
     unsigned int max_sm_gs;
     unsigned int max_sm_ps;