Better names for device objects.

engine/src/flutter/impeller/BUILD.gn

@@ -8,6 +8,7 @@ config("impeller_public_config") {
 
 group("impeller") {
   deps = [
+    "base",
     "compiler",
     "compositor",
     "entity",

engine/src/flutter/impeller/base/BUILD.gn

@@ -0,0 +1,17 @@
+# Copyright 2013 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("../tools/impeller.gni")
+
+impeller_component("base") {
+  # Only the umbrella header may be imported.
+  public = [ "base.h" ]
+
+  sources = [
+    "base.h",
+    "config.h",
+    "strings.cc",
+    "strings.h",
+  ]
+}

engine/src/flutter/impeller/base/base.h

@@ -0,0 +1,7 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#pragma once
+
+#include "impeller/base/strings.h"

engine/src/flutter/impeller/base/config.h

@@ -0,0 +1,20 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#pragma once
+
+#include "flutter/fml/build_config.h"
+
+#if defined(__GNUC__) || defined(__clang__)
+#define IMPELLER_COMPILER_CLANG 1
+#else  // defined(__GNUC__) || defined(__clang__)
+#define IMPELLER_COMPILER_CLANG 0
+#endif  // defined(__GNUC__) || defined(__clang__)
+
+#if IMPELLER_COMPILER_CLANG
+#define IMPELLER_PRINTF_FORMAT(format_number, args_number) \
+  __attribute__((format(printf, format_number, args_number)))
+#else  // IMPELLER_COMPILER_CLANG
+#define IMPELLER_PRINTF_FORMAT(format_number, args_number)
+#endif  // IMPELLER_COMPILER_CLANG

engine/src/flutter/impeller/base/strings.cc

@@ -0,0 +1,21 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "impeller/base/strings.h"
+
+#include <cstdarg>
+
+namespace impeller {
+
+IMPELLER_PRINTF_FORMAT(1, 2)
+std::string SPrintF(const char* format, ...) {
+  va_list list;
+  va_start(list, format);
+  char buffer[64] = {0};
+  ::vsnprintf(buffer, sizeof(buffer), format, list);
+  va_end(list);
+  return buffer;
+}
+
+}  // namespace impeller

engine/src/flutter/impeller/base/strings.h

@@ -0,0 +1,16 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#pragma once
+
+#include <string>
+
+#include "impeller/base/config.h"
+
+namespace impeller {
+
+IMPELLER_PRINTF_FORMAT(1, 2)
+std::string SPrintF(const char* format, ...);
+
+}  // namespace impeller

engine/src/flutter/impeller/compositor/BUILD.gn

@@ -59,6 +59,7 @@ impeller_component("compositor") {
   ]
 
   public_deps = [
+    "../base",
     "../geometry",
     "../shader_glue",
   ]

engine/src/flutter/impeller/compositor/render_pass.mm

@@ -6,6 +6,7 @@
 
 #include "flutter/fml/closure.h"
 #include "flutter/fml/logging.h"
+#include "impeller/base/base.h"
 #include "impeller/compositor/device_buffer.h"
 #include "impeller/compositor/formats_metal.h"
 #include "impeller/shader_glue/shader_types.h"
@@ -139,6 +140,7 @@ bool RenderPass::IsValid() const {
 
 void RenderPass::SetLabel(std::string label) {
   label_ = std::move(label);
+  transients_buffer_->SetLabel(SPrintF("%s Transients", label_.c_str()));
 }
 
 bool RenderPass::FinishEncoding(Allocator& transients_allocator) const {

engine/src/flutter/impeller/entity/entity_renderer.mm

@@ -37,7 +37,7 @@ bool EntityRenderer::OnIsValid() const {
 }
 
 bool EntityRenderer::OnRender(RenderPass& pass) {
-  pass.SetLabel("EntityRenderer");
+  pass.SetLabel("EntityRenderer Render Pass");
 
   shader::BoxVertexInfo::UniformBuffer uniforms;
   uniforms.mvp = Matrix::MakeOrthographic({800, 600});

engine/src/flutter/impeller/primitives/box_primitive.mm

@@ -7,6 +7,7 @@
 #include <memory>
 
 #include "flutter/fml/logging.h"
+#include "impeller/base/base.h"
 #include "impeller/compositor/pipeline_descriptor.h"
 #include "impeller/compositor/shader_library.h"
 #include "impeller/compositor/vertex_descriptor.h"
@@ -16,7 +17,7 @@ namespace impeller {
 BoxPrimitive::BoxPrimitive(std::shared_ptr<Context> context)
     : Primitive(context) {
   PipelineDescriptor desc;
-  desc.SetLabel(shader::BoxVertexInfo::kLabel);
+  desc.SetLabel(SPrintF("%s Pipeline", shader::BoxVertexInfo::kLabel.data()));
 
   {
     auto fragment_function = context->GetShaderLibrary()->GetFunction(