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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_METAL_UTIL_TEST_SHADER_H_
#define COMPONENTS_METAL_UTIL_TEST_SHADER_H_
#include "base/callback.h"
#include "base/task_runner.h"
#include "base/time/time.h"
#include "components/metal_util/metal_util_export.h"
namespace metal {
enum class METAL_UTIL_EXPORT TestShaderComponent {
// Test a shader compile from source.
kCompile,
// Test linking a precompiled shader.
kLink,
};
enum class METAL_UTIL_EXPORT TestShaderResult {
// Not attempted (e.g, because macOS version does not support Metal).
kNotAttempted,
// Shader compile succeeded.
kSucceeded,
// Shader compile failed.
kFailed,
// Shader compile timed out.
kTimedOut,
};
using TestShaderCallback =
base::OnceCallback<void(TestShaderResult result,
const base::TimeDelta& method_time,
const base::TimeDelta& compile_time)>;
// A default timeout value for compiling the test shader.
constexpr base::TimeDelta kTestShaderTimeout = base::TimeDelta::FromMinutes(1);
// Return the value kTestShaderTimeoutTime for |method_time| and |compile_time|
// if they time out.
constexpr base::TimeDelta kTestShaderTimeForever =
base::TimeDelta::FromMinutes(3);
// A default delay before attempting to compile the test shader.
constexpr base::TimeDelta kTestShaderDelay = base::TimeDelta::FromMinutes(3);
// Attempt to asynchronously compile a trivial Metal shader. If |delay| is zero,
// then compile synchronously, otherwise, post a delayed task to do the compile.
// |callback| with the result when the shader succeeds or after |timeout| has
// elapsed.
//
// This is used to determine of the Metal shader compiler is resposive. Note
// that |callback| will be called either on another thread or inside the
// TestShader function call.
// https://crbug.com/974219
void METAL_UTIL_EXPORT
TestShader(TestShaderCallback callback,
const base::TimeDelta& delay = kTestShaderDelay,
const base::TimeDelta& timeout = kTestShaderTimeout,
TestShaderComponent component = TestShaderComponent::kLink);
} // namespace metal
#endif // COMPONENTS_METAL_UTIL_TEST_SHADER_H_
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