// Copyright 2017 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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#ifndef SRC_DAWN_SAMPLES_SAMPLEUTILS_H_
#define SRC_DAWN_SAMPLES_SAMPLEUTILS_H_

#ifndef __EMSCRIPTEN__
#include "GLFW/glfw3.h"
#endif  // __EMSCRIPTEN__

#include <webgpu/webgpu_cpp.h>

bool InitSample(int argc, const char** argv);

class SampleBase {
  public:
    SampleBase();
    SampleBase(uint32_t w, uint32_t h);

    static int Run(unsigned int delay);

  protected:
    virtual bool SetupImpl() = 0;
    virtual void FrameImpl() = 0;

    wgpu::Instance instance = nullptr;
    wgpu::Adapter adapter = nullptr;
    wgpu::Device device = nullptr;
    wgpu::Queue queue = nullptr;

    wgpu::Surface surface = nullptr;

    wgpu::TextureFormat GetPreferredSurfaceTextureFormat() { return preferredSurfaceTextureFormat; }

  private:
    bool Setup();

    static constexpr uint32_t kWidth = 640;
    static constexpr uint32_t kHeight = 480;
    uint32_t width = kWidth;
    uint32_t height = kHeight;
    wgpu::TextureFormat preferredSurfaceTextureFormat = wgpu::TextureFormat::BGRA8Unorm;

#ifndef __EMSCRIPTEN__
    GLFWwindow* window = nullptr;
#endif  // __EMSCRIPTEN__
};

#endif  // SRC_DAWN_SAMPLES_SAMPLEUTILS_H_