wined3d: Enable SM4 support in the GLSL shader backend when possible.

dlls/wined3d/directx.c

@@ -4750,7 +4750,7 @@ HRESULT CDECL wined3d_get_device_caps(const struct wined3d *wined3d, UINT adapte
      * are the same among all shader models. So to avoid code duplication set the shader version
      * specific, but otherwise constant caps here
      */
-    if (caps->VertexShaderVersion == 3)
+    if (caps->VertexShaderVersion >= 3)
     {
         /* Where possible set the caps based on OpenGL extensions and if they
          * aren't set (in case of software rendering) use the VS 3.0 from
@@ -4787,7 +4787,7 @@ HRESULT CDECL wined3d_get_device_caps(const struct wined3d *wined3d, UINT adapte
         caps->MaxVertexShader30InstructionSlots = 0;
     }
 
-    if (caps->PixelShaderVersion == 3)
+    if (caps->PixelShaderVersion >= 3)
     {
         /* Where possible set the caps based on OpenGL extensions and if they
          * aren't set (in case of software rendering) use the PS 3.0 from

dlls/wined3d/glsl_shader.c

@@ -4913,9 +4913,15 @@ static void shader_glsl_context_destroyed(void *shader_priv, const struct wined3
 
 static void shader_glsl_get_caps(const struct wined3d_gl_info *gl_info, struct shader_caps *caps)
 {
+    if (gl_info->supported[EXT_GPU_SHADER4] && gl_info->supported[ARB_GEOMETRY_SHADER4]
+            && gl_info->glsl_version >= MAKEDWORD_VERSION(1, 50))
+    {
+        caps->VertexShaderVersion = 4;
+        caps->PixelShaderVersion = 4;
+    }
     /* ARB_shader_texture_lod or EXT_gpu_shader4 is required for the SM3
      * texldd and texldl instructions. */
-    if (gl_info->supported[ARB_SHADER_TEXTURE_LOD] || gl_info->supported[EXT_GPU_SHADER4])
+    else if (gl_info->supported[ARB_SHADER_TEXTURE_LOD] || gl_info->supported[EXT_GPU_SHADER4])
     {
         caps->VertexShaderVersion = 3;
         caps->PixelShaderVersion = 3;