[PATCH 3/8] wined3d: Treat zero shininess as no specular lighting in legacy lighting mode.

[Paul Gofman]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=42572
Signed-off-by: Paul Gofman 
---
 dlls/wined3d/glsl_shader.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index d9e0bda9ea..9434d9007c 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -9145,7 +9145,7 @@ static const char *shader_glsl_ffp_mcs(enum wined3d_material_color_source mcs, c
 }

static void shader_glsl_ffp_vertex_lighting_footer(struct wined3d_string_buffer *buffer,
-        const struct wined3d_ffp_vs_settings *settings, unsigned int idx)
+        const struct wined3d_ffp_vs_settings *settings, unsigned int idx, BOOL legacy_lighting)
 {
     shader_addline(buffer, "diffuse += clamp(dot(dir, normal), 0.0, 1.0)"
             " * ffp_light[%u].diffuse.xyz * att;\n", idx);
@@ -9153,8 +9153,9 @@ static void shader_glsl_ffp_vertex_lighting_footer(struct wined3d_string_buffer
         shader_addline(buffer, "t = dot(normal, normalize(dir - normalize(ec_pos.xyz)));\n");
     else
         shader_addline(buffer, "t = dot(normal, normalize(dir + vec3(0.0, 0.0, -1.0)));\n");
-    shader_addline(buffer, "if (dot(dir, normal) > 0.0 && t > 0.0) specular +="
-            " pow(t, ffp_material.shininess) * ffp_light[%u].specular * att;\n", idx);
+    shader_addline(buffer, "if (dot(dir, normal) > 0.0 && t > 0.0%s) specular +="
+            " pow(t, ffp_material.shininess) * ffp_light[%u].specular * att;\n",
+            legacy_lighting ? " && ffp_material.shininess > 0.0" : "", idx);
 }

static void shader_glsl_ffp_vertex_lighting(struct wined3d_string_buffer *buffer,
@@ -9209,7 +9210,7 @@ static void shader_glsl_ffp_vertex_lighting(struct wined3d_string_buffer *buffer
             continue;
         }
         shader_addline(buffer, "dir = normalize(dir);\n");
-        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx);
+        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx, legacy_lighting);
         shader_addline(buffer, "}\n");
     }

@@ -9250,7 +9251,7 @@ static void shader_glsl_ffp_vertex_lighting(struct wined3d_string_buffer *buffer
             shader_addline(buffer, "}\n");
             continue;
         }
-        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx);
+        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx, legacy_lighting);
         shader_addline(buffer, "}\n");
     }

@@ -9261,7 +9262,7 @@ static void shader_glsl_ffp_vertex_lighting(struct wined3d_string_buffer *buffer
             continue;
         shader_addline(buffer, "att = 1.0;\n");
         shader_addline(buffer, "dir = normalize(ffp_light[%u].direction.xyz);\n", idx);
-        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx);
+        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx, legacy_lighting);
     }

for (i = 0; i < settings->parallel_point_light_count; ++i, ++idx)
@@ -9271,7 +9272,7 @@ static void shader_glsl_ffp_vertex_lighting(struct wined3d_string_buffer *buffer
             continue;
         shader_addline(buffer, "att = 1.0;\n");
         shader_addline(buffer, "dir = normalize(ffp_light[%u].position.xyz);\n", idx);
-        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx);
+        shader_glsl_ffp_vertex_lighting_footer(buffer, settings, idx, legacy_lighting);
     }

shader_addline(buffer, "ffp_varying_diffuse.xyz = %s.xyz * ambient + %s.xyz * diffuse + %s.xyz;\n",