// Copyright 2018 The Dawn & Tint Authors
//
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// 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.
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// 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"
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#ifndef SRC_DAWN_NATIVE_OPENGL_DEVICEGL_H_
#define SRC_DAWN_NATIVE_OPENGL_DEVICEGL_H_

#include <memory>

#include "dawn/native/dawn_platform.h"

#include "dawn/common/Platform.h"
#include "dawn/native/Device.h"
#include "dawn/native/QuerySet.h"
#include "dawn/native/opengl/EGLFunctions.h"
#include "dawn/native/opengl/Forward.h"
#include "dawn/native/opengl/GLFormat.h"
#include "dawn/native/opengl/OpenGLFunctions.h"

namespace dawn::native::opengl {

class ContextEGL;

class Device final : public DeviceBase {
  public:
    class Context;
    static ResultOrError<Ref<Device>> Create(AdapterBase* adapter,
                                             const UnpackedPtr<DeviceDescriptor>& descriptor,
                                             const OpenGLFunctions& functions,
                                             std::unique_ptr<ContextEGL> context,
                                             const TogglesState& deviceToggles,
                                             Ref<DeviceBase::DeviceLostEvent>&& lostEvent);
    ~Device() override;

    MaybeError Initialize(const UnpackedPtr<DeviceDescriptor>& descriptor);

    // Returns all the OpenGL entry points and ensures that the associated GL context is current.
    const OpenGLFunctions& GetGL() const;

    // Helper functions to get access to relevant EGL objects.
    const EGLFunctions& GetEGL(bool makeCurrent) const;
    EGLDisplay GetEGLDisplay() const;
    ContextEGL* GetContext() const;

    const GLFormat& GetGLFormat(const Format& format);

    int GetMaxTextureMaxAnisotropy() const;

    MaybeError ValidateTextureCanBeWrapped(const UnpackedPtr<TextureDescriptor>& descriptor);
    Ref<TextureBase> CreateTextureWrappingEGLImage(const ExternalImageDescriptor* descriptor,
                                                   ::EGLImage image);
    Ref<TextureBase> CreateTextureWrappingGLTexture(const ExternalImageDescriptor* descriptor,
                                                    GLuint texture);

    ResultOrError<Ref<CommandBufferBase>> CreateCommandBuffer(
        CommandEncoder* encoder,
        const CommandBufferDescriptor* descriptor) override;

    MaybeError TickImpl() override;

    MaybeError CopyFromStagingToBufferImpl(BufferBase* source,
                                           uint64_t sourceOffset,
                                           BufferBase* destination,
                                           uint64_t destinationOffset,
                                           uint64_t size) override;

    MaybeError CopyFromStagingToTextureImpl(const BufferBase* source,
                                            const TextureDataLayout& src,
                                            const TextureCopy& dst,
                                            const Extent3D& copySizePixels) override;

    uint32_t GetOptimalBytesPerRowAlignment() const override;
    uint64_t GetOptimalBufferToTextureCopyOffsetAlignment() const override;

    float GetTimestampPeriodInNS() const override;

    bool MayRequireDuplicationOfIndirectParameters() const override;
    bool ShouldApplyIndexBufferOffsetToFirstIndex() const override;

  private:
    Device(AdapterBase* adapter,
           const UnpackedPtr<DeviceDescriptor>& descriptor,
           const OpenGLFunctions& functions,
           std::unique_ptr<ContextEGL> context,
           const TogglesState& deviceToggles,
           Ref<DeviceBase::DeviceLostEvent>&& lostEvent);

    ResultOrError<Ref<BindGroupBase>> CreateBindGroupImpl(
        const BindGroupDescriptor* descriptor) override;
    ResultOrError<Ref<BindGroupLayoutInternalBase>> CreateBindGroupLayoutImpl(
        const BindGroupLayoutDescriptor* descriptor) override;
    ResultOrError<Ref<BufferBase>> CreateBufferImpl(
        const UnpackedPtr<BufferDescriptor>& descriptor) override;
    ResultOrError<Ref<PipelineLayoutBase>> CreatePipelineLayoutImpl(
        const UnpackedPtr<PipelineLayoutDescriptor>& descriptor) override;
    ResultOrError<Ref<QuerySetBase>> CreateQuerySetImpl(
        const QuerySetDescriptor* descriptor) override;
    ResultOrError<Ref<SamplerBase>> CreateSamplerImpl(const SamplerDescriptor* descriptor) override;
    ResultOrError<Ref<ShaderModuleBase>> CreateShaderModuleImpl(
        const UnpackedPtr<ShaderModuleDescriptor>& descriptor,
        ShaderModuleParseResult* parseResult,
        OwnedCompilationMessages* compilationMessages) override;
    ResultOrError<Ref<SwapChainBase>> CreateSwapChainImpl(
        Surface* surface,
        SwapChainBase* previousSwapChain,
        const SurfaceConfiguration* config) override;
    ResultOrError<Ref<TextureBase>> CreateTextureImpl(
        const UnpackedPtr<TextureDescriptor>& descriptor) override;
    ResultOrError<Ref<TextureViewBase>> CreateTextureViewImpl(
        TextureBase* texture,
        const UnpackedPtr<TextureViewDescriptor>& descriptor) override;
    Ref<ComputePipelineBase> CreateUninitializedComputePipelineImpl(
        const UnpackedPtr<ComputePipelineDescriptor>& descriptor) override;
    Ref<RenderPipelineBase> CreateUninitializedRenderPipelineImpl(
        const UnpackedPtr<RenderPipelineDescriptor>& descriptor) override;

    GLenum GetBGRAInternalFormat(const OpenGLFunctions& gl) const;
    void DestroyImpl() override;

    const OpenGLFunctions mGL;

    GLFormatTable mFormatTable;
    std::unique_ptr<ContextEGL> mContext;
    int mMaxTextureMaxAnisotropy = 0;
};

}  // namespace dawn::native::opengl

#endif  // SRC_DAWN_NATIVE_OPENGL_DEVICEGL_H_