wined3d: Do not pass LOD to texelFetch() for buffer resources.

dlls/wined3d/glsl_shader.c

@@ -4956,10 +4956,12 @@ static void shader_glsl_resinfo(const struct wined3d_shader_instruction *ins)
 /* FIXME: The current implementation does not handle multisample textures correctly. */
 static void shader_glsl_ld(const struct wined3d_shader_instruction *ins)
 {
+    const struct wined3d_shader_reg_maps *reg_maps = ins->ctx->reg_maps;
     unsigned int resource_idx, sampler_idx, sampler_bind_idx;
     struct glsl_src_param coord_param, lod_param;
     struct glsl_sample_function sample_function;
     DWORD flags = WINED3D_GLSL_SAMPLE_LOAD;
+    BOOL has_lod_param;
 
     if (wined3d_shader_instruction_has_texel_offset(ins))
         flags |= WINED3D_GLSL_SAMPLE_OFFSET;
@@ -4967,12 +4969,20 @@ static void shader_glsl_ld(const struct wined3d_shader_instruction *ins)
     resource_idx = ins->src[1].reg.idx[0].offset;
     sampler_idx = WINED3D_SAMPLER_DEFAULT;
 
+    if (resource_idx >= ARRAY_SIZE(reg_maps->resource_info))
+    {
+        ERR("Invalid resource index %u.\n", resource_idx);
+        return;
+    }
+    has_lod_param = reg_maps->resource_info[resource_idx].type != WINED3D_SHADER_RESOURCE_BUFFER;
+
     shader_glsl_get_sample_function(ins->ctx, resource_idx, sampler_idx, flags, &sample_function);
     shader_glsl_add_src_param(ins, &ins->src[0], sample_function.coord_mask, &coord_param);
     shader_glsl_add_src_param(ins, &ins->src[0], WINED3DSP_WRITEMASK_3, &lod_param);
-    sampler_bind_idx = shader_glsl_find_sampler(&ins->ctx->reg_maps->sampler_map, resource_idx, sampler_idx);
+    sampler_bind_idx = shader_glsl_find_sampler(&reg_maps->sampler_map, resource_idx, sampler_idx);
     shader_glsl_gen_sample_code(ins, sampler_bind_idx, &sample_function, ins->src[1].swizzle,
-            NULL, NULL, lod_param.param_str, &ins->texel_offset, "%s", coord_param.param_str);
+            NULL, NULL, has_lod_param ? lod_param.param_str : NULL, &ins->texel_offset,
+            "%s", coord_param.param_str);
     shader_glsl_release_sample_function(ins->ctx, &sample_function);
 }