//--------------------------------------------------------------------------------------
// File: DDSTextureLoader.h
//
// Functions for loading a DDS texture and creating a Direct3D runtime resource for it
//
// Note these functions are useful as a light-weight runtime loader for DDS files. For
// a full-featured DDS file reader, writer, and texture processing pipeline see
// the 'Texconv' sample and the 'DirectXTex' library.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
//
// http://go.microsoft.com/fwlink/?LinkId=248926
// http://go.microsoft.com/fwlink/?LinkId=248929
//--------------------------------------------------------------------------------------

#pragma once

#include <d3d11_1.h>
#include <stdint.h>


namespace DirectX
{
    enum DDS_ALPHA_MODE
    {
        DDS_ALPHA_MODE_UNKNOWN       = 0,
        DDS_ALPHA_MODE_STRAIGHT      = 1,
        DDS_ALPHA_MODE_PREMULTIPLIED = 2,
        DDS_ALPHA_MODE_OPAQUE        = 3,
        DDS_ALPHA_MODE_CUSTOM        = 4,
    };

    // Standard version
    HRESULT CreateDDSTextureFromMemory(
        _In_ ID3D11Device* d3dDevice,
        _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
        _In_ size_t ddsDataSize,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _In_ size_t maxsize = 0,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

    HRESULT CreateDDSTextureFromFile(
        _In_ ID3D11Device* d3dDevice,
        _In_z_ const wchar_t* szFileName,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _In_ size_t maxsize = 0,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

    // Standard version with optional auto-gen mipmap support
    HRESULT CreateDDSTextureFromMemory(
        _In_ ID3D11Device* d3dDevice,
        _In_opt_ ID3D11DeviceContext* d3dContext,
        _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
        _In_ size_t ddsDataSize,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _In_ size_t maxsize = 0,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

    HRESULT CreateDDSTextureFromFile(
        _In_ ID3D11Device* d3dDevice,
        _In_opt_ ID3D11DeviceContext* d3dContext,
        _In_z_ const wchar_t* szFileName,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _In_ size_t maxsize = 0,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

    // Extended version
    HRESULT CreateDDSTextureFromMemoryEx(
        _In_ ID3D11Device* d3dDevice,
        _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
        _In_ size_t ddsDataSize,
        _In_ size_t maxsize,
        _In_ D3D11_USAGE usage,
        _In_ unsigned int bindFlags,
        _In_ unsigned int cpuAccessFlags,
        _In_ unsigned int miscFlags,
        _In_ bool forceSRGB,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

    HRESULT CreateDDSTextureFromFileEx(
        _In_ ID3D11Device* d3dDevice,
        _In_z_ const wchar_t* szFileName,
        _In_ size_t maxsize,
        _In_ D3D11_USAGE usage,
        _In_ unsigned int bindFlags,
        _In_ unsigned int cpuAccessFlags,
        _In_ unsigned int miscFlags,
        _In_ bool forceSRGB,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

    // Extended version with optional auto-gen mipmap support
    HRESULT CreateDDSTextureFromMemoryEx(
        _In_ ID3D11Device* d3dDevice,
        _In_opt_ ID3D11DeviceContext* d3dContext,
        _In_reads_bytes_(ddsDataSize) const uint8_t* ddsData,
        _In_ size_t ddsDataSize,
        _In_ size_t maxsize,
        _In_ D3D11_USAGE usage,
        _In_ unsigned int bindFlags,
        _In_ unsigned int cpuAccessFlags,
        _In_ unsigned int miscFlags,
        _In_ bool forceSRGB,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);

    HRESULT CreateDDSTextureFromFileEx(
        _In_ ID3D11Device* d3dDevice,
        _In_opt_ ID3D11DeviceContext* d3dContext,
        _In_z_ const wchar_t* szFileName,
        _In_ size_t maxsize,
        _In_ D3D11_USAGE usage,
        _In_ unsigned int bindFlags,
        _In_ unsigned int cpuAccessFlags,
        _In_ unsigned int miscFlags,
        _In_ bool forceSRGB,
        _Outptr_opt_ ID3D11Resource** texture,
        _Outptr_opt_ ID3D11ShaderResourceView** textureView,
        _Out_opt_ DDS_ALPHA_MODE* alphaMode = nullptr);
}