gallium/u_tests: add texture_barrier and FBFETCH tests

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

src/gallium/auxiliary/util/u_tests.c

@@ -228,7 +228,7 @@ util_probe_rect_rgba_multi(struct pipe_context *ctx, struct pipe_resource *tex,
                          expected[e*4], expected[e*4+1],
                          expected[e*4+2], expected[e*4+3]);
                   printf("Got: %.3f, %.3f, %.3f, %.3f\n",
-                         probe[0], probe[1], probe[2], probe[2]);
+                         probe[0], probe[1], probe[2], probe[3]);
                   pass = false;
                   goto done;
                }
@@ -592,6 +592,113 @@ test_sync_file_fences(struct pipe_context *ctx)
    util_report_result(pass);
 }
 
+static void
+test_texture_barrier(struct pipe_context *ctx, bool use_fbfetch)
+{
+   struct cso_context *cso;
+   struct pipe_resource *cb;
+   void *fs, *vs;
+   struct pipe_sampler_view *view = NULL;
+   const char *text;
+
+   if (!ctx->screen->get_param(ctx->screen, PIPE_CAP_TEXTURE_BARRIER)) {
+      util_report_result_helper(SKIP, "%s: %s", __func__,
+                                use_fbfetch ? "FBFETCH" : "sampler");
+      return;
+   }
+   if (use_fbfetch &&
+       !ctx->screen->get_param(ctx->screen, PIPE_CAP_TGSI_FS_FBFETCH)) {
+      util_report_result_helper(SKIP, "%s: %s", __func__,
+                                use_fbfetch ? "FBFETCH" : "sampler");
+      return;
+   }
+
+   cso = cso_create_context(ctx, 0);
+   cb = util_create_texture2d(ctx->screen, 256, 256,
+                              PIPE_FORMAT_R8G8B8A8_UNORM);
+   util_set_common_states_and_clear(cso, ctx, cb);
+
+   if (use_fbfetch) {
+      /* Fragment shader. */
+      text = "FRAG\n"
+             "DCL OUT[0], COLOR[0]\n"
+             "DCL TEMP[0]\n"
+             "IMM[0] FLT32 { 0.1, 0.2, 0.3, 0.4}\n"
+
+             "FBFETCH TEMP[0], OUT[0]\n"
+             "ADD OUT[0], TEMP[0], IMM[0]\n"
+             "END\n";
+   } else {
+      struct pipe_sampler_view templ = {{0}};
+      templ.format = cb->format;
+      templ.target = cb->target;
+      templ.swizzle_r = PIPE_SWIZZLE_X;
+      templ.swizzle_g = PIPE_SWIZZLE_Y;
+      templ.swizzle_b = PIPE_SWIZZLE_Z;
+      templ.swizzle_a = PIPE_SWIZZLE_W;
+      view = ctx->create_sampler_view(ctx, cb, &templ);
+      ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &view);
+
+      /* Fragment shader. */
+      text = "FRAG\n"
+             "DCL SV[0], POSITION\n"
+             "DCL SAMP[0]\n"
+             "DCL SVIEW[0], 2D, FLOAT\n"
+             "DCL OUT[0], COLOR[0]\n"
+             "DCL TEMP[0]\n"
+             "IMM[0] FLT32 { 0.1, 0.2, 0.3, 0.4}\n"
+             "IMM[1] INT32 { 0, 0, 0, 0}\n"
+
+             "F2I TEMP[0].xy, SV[0].xyyy\n"
+             "MOV TEMP[0].z, IMM[1].xxxx\n"
+             "TXF TEMP[0], TEMP[0].xyzz, SAMP[0], 2D\n"
+             "ADD OUT[0], TEMP[0], IMM[0]\n"
+             "END\n";
+   }
+
+   struct tgsi_token tokens[1000];
+   struct pipe_shader_state state;
+
+   if (!tgsi_text_translate(text, tokens, ARRAY_SIZE(tokens))) {
+      assert(0);
+      util_report_result_helper(FAIL, "%s: %s", __func__,
+                                use_fbfetch ? "FBFETCH" : "sampler");
+      return;
+   }
+   pipe_shader_state_from_tgsi(&state, tokens);
+#if 0
+   tgsi_dump(state.tokens, 0);
+#endif
+
+   fs = ctx->create_fs_state(ctx, &state);
+   cso_set_fragment_shader_handle(cso, fs);
+
+   /* Vertex shader. */
+   vs = util_set_passthrough_vertex_shader(cso, ctx, false);
+
+   for (int i = 0; i < 2; i++) {
+      ctx->texture_barrier(ctx,
+                           use_fbfetch ? PIPE_TEXTURE_BARRIER_FRAMEBUFFER :
+                                         PIPE_TEXTURE_BARRIER_SAMPLER);
+      util_draw_fullscreen_quad(cso);
+   }
+
+   /* Probe pixels. */
+   static const float expected[] = {0.3, 0.5, 0.7, 0.9};
+   bool pass = util_probe_rect_rgba(ctx, cb, 0, 0,
+                                    cb->width0, cb->height0, expected);
+
+   /* Cleanup. */
+   cso_destroy_context(cso);
+   ctx->delete_vs_state(ctx, vs);
+   ctx->delete_fs_state(ctx, fs);
+   pipe_sampler_view_reference(&view, NULL);
+   pipe_resource_reference(&cb, NULL);
+
+   util_report_result_helper(pass, "%s: %s", __func__,
+                             use_fbfetch ? "FBFETCH" : "sampler");
+}
+
 /**
  * Run all tests. This should be run with a clean context after
  * context_create.
@@ -607,6 +714,8 @@ util_run_tests(struct pipe_screen *screen)
    null_sampler_view(ctx, TGSI_TEXTURE_BUFFER);
    util_test_constant_buffer(ctx, NULL);
    test_sync_file_fences(ctx);
+   test_texture_barrier(ctx, false);
+   test_texture_barrier(ctx, true);
 
    ctx->destroy(ctx);