vrend: Enable texture_multisample for GLES

Just set the cap if we have GLES 3.0 and call the
glTexStorage*DMultisample functions as appropriate.

Causes a bunch of the tests in
dEQP-GLES3.functional.fbo.msaa.*_samples to pass.

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Jakob Bornecrantz <jakob@collabora.com>

src/vrend_renderer.c

@@ -4670,8 +4670,17 @@ int vrend_renderer_resource_create(struct vrend_renderer_resource_create_args *a
 
       if (args->nr_samples > 1) {
          if (vrend_state.use_gles) {
-            report_gles_missing_func(NULL, "glTexImage[2,3]DMultisample");
+            if (gr->target == GL_TEXTURE_2D_MULTISAMPLE) {
-         } else if (gr->target == GL_TEXTURE_2D_MULTISAMPLE) {
+               glTexStorage2DMultisample(gr->target, args->nr_samples,
+                                       internalformat, args->width, args->height,
+                                       GL_TRUE);
+            } else {
+               glTexStorage3DMultisample(gr->target, args->nr_samples,
+                                       internalformat, args->width, args->height, args->array_size,
+                                       GL_TRUE);
+            }
+         } else {
+            if (gr->target == GL_TEXTURE_2D_MULTISAMPLE) {
                glTexImage2DMultisample(gr->target, args->nr_samples,
                                        internalformat, args->width, args->height,
                                        GL_TRUE);
@@ -4680,6 +4689,7 @@ int vrend_renderer_resource_create(struct vrend_renderer_resource_create_args *a
                                        internalformat, args->width, args->height, args->array_size,
                                        GL_TRUE);
             }
+         }
 
       } else if (gr->target == GL_TEXTURE_CUBE_MAP) {
          int i;
@@ -6691,8 +6701,6 @@ void vrend_renderer_fill_caps_gles(uint32_t set, uint32_t version,
 
    caps->v1.bset.seamless_cube_map_per_texture = 0;
 
-   caps->v1.bset.texture_multisample = 0;
-
    caps->v1.bset.mirror_clamp = 0;
    caps->v1.bset.indep_blend_func = 0;
    caps->v1.bset.cube_map_array = 0;
@@ -6722,6 +6730,10 @@ void vrend_renderer_fill_caps_gles(uint32_t set, uint32_t version,
       caps->v1.bset.primitive_restart = 1;
    }
 
+   if (gles_ver >= 30) {
+      caps->v1.bset.texture_multisample = 1;
+   }
+
    if (!fill_capset2) {
       return;
    }