vrend: Lift glsl level on GLES 3.1 + some extensions to 400

OES_geometry_shader and ARB_gpu_shader5 are enabled by gallium (also)
based on the GLSL level, but nothing else seems to be dependend on this
specific value, so set it. This also make the check for feat_tessellation
for enabling PIPE_PRIM_PATCH redundant.

Enables amonst others:
  dEQP-GLES31.functional.texture.gather.offsets.*
  dEQP-GLES31.functional.tessellation*
  dEQP-GLES31.functional.geometry_shading.*
  dEQP-GLES31.functional.shaders.opaque_type_indexing.*

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>

src/vrend_renderer.c

@@ -108,6 +108,7 @@ enum features_id
    feat_gl_prim_restart,
    feat_gles_khr_robustness,
    feat_gles31_vertex_attrib_binding,
+   feat_gpu_shader5,
    feat_images,
    feat_indep_blend,
    feat_indep_blend_func,
@@ -173,6 +174,7 @@ static const  struct {
    [feat_gl_prim_restart] = { 31, 30, {} },
    [feat_gles_khr_robustness] = { UNAVAIL, UNAVAIL, { "GL_KHR_robustness" } },
    [feat_gles31_vertex_attrib_binding] = { 43, 31, { "GL_ARB_vertex_attrib_binding" } },
+   [feat_gpu_shader5] = { 40, 32, {"GL_ARB_gpu_shader5", "GL_EXT_gpu_shader5", "GL_OES_gpu_shader5" } },
    [feat_images] = { 42, 31, { "GL_ARB_shader_image_load_store" } },
    [feat_indep_blend] = { 30, UNAVAIL, { "GL_EXT_draw_buffers2" } },
    [feat_indep_blend_func] = { 40, UNAVAIL, { "GL_ARB_draw_buffers_blend" } },
@@ -7820,8 +7822,17 @@ static void vrend_fill_caps_glsl_version(int gl_ver, int gles_ver,
    if (gles_ver > 0) {
       caps->v1.glsl_level = 120;
 
-      if (gles_ver >= 31)
+      if (gles_ver >= 31) {
          caps->v1.glsl_level = 310;
+         if (has_feature(feat_tessellation) &&
+             has_feature(feat_geometry_shader) &&
+             has_feature(feat_gpu_shader5))
+            /* This is probably a lie, but Gallium enables
+             * OES_geometry_shader and ARB_gpu_shader5
+             * based on this value, apart from that it doesn't
+             * seem to be a crucial value */
+            caps->v1.glsl_level = 400;
+      }
       else if (gles_ver >= 30)
          caps->v1.glsl_level = 130;
    }
@@ -7881,7 +7892,7 @@ static void vrend_renderer_fill_caps_v1(int gl_ver, int gles_ver, union virgl_ca
                             (1 << PIPE_PRIM_TRIANGLES_ADJACENCY) |
                             (1 << PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
    }
-   if (caps->v1.glsl_level >= 400 || has_feature(feat_tessellation))
+   if (caps->v1.glsl_level >= 400)
       caps->v1.prim_mask |= (1 << PIPE_PRIM_PATCHES);
 
    if (epoxy_has_gl_extension("GL_ARB_vertex_type_10f_11f_11f_rev")) {