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/*
 * Copyright (c) 2021, the SerenityOS developers.
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/String.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/ImageDecoder.h>

namespace Gfx {

enum MiscFlags : u32 {
    DDS_RESOURCE_MISC_TEXTURECUBE = 0x4,
};

enum Misc2Flags : u32 {
    DDS_ALPHA_MODE_UNKNOWN = 0x0,
    DDS_ALPHA_MODE_STRAIGHT = 0x1,
    DDS_ALPHA_MODE_PREMULTIPLIED = 0x2,
    DDS_ALPHA_MODE_OPAQUE = 0x3,
    DDS_ALPHA_MODE_CUSTOM = 0x4,
};

enum Caps1Flags : u32 {
    DDSCAPS_COMPLEX = 0x8,
    DDSCAPS_TEXTURE = 0x1000,
    DDSCAPS_MIPMAP = 0x400000,
};

enum Caps2Flags : u32 {
    DDSCAPS2_CUBEMAP = 0x200,
    DDSCAPS2_CUBEMAP_POSITIVEX = 0x400,
    DDSCAPS2_CUBEMAP_NEGATIVEX = 0x800,
    DDSCAPS2_CUBEMAP_POSITIVEY = 0x1000,
    DDSCAPS2_CUBEMAP_NEGATIVEY = 0x2000,
    DDSCAPS2_CUBEMAP_POSITIVEZ = 0x4000,
    DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x8000,
    DDSCAPS2_VOLUME = 0x200000,
};

enum ResourceDimensions : u32 {
    DDS_DIMENSION_UNKNOWN,
    DDS_DIMENSION_BUFFER,
    DDS_DIMENSION_TEXTURE1D = 2,
    DDS_DIMENSION_TEXTURE2D = 3,
    DDS_DIMENSION_TEXTURE3D = 4,
};

enum DXGIFormat : u32 {
    DXGI_FORMAT_UNKNOWN = 0,
    DXGI_FORMAT_R32G32B32A32_TYPELESS,
    DXGI_FORMAT_R32G32B32A32_FLOAT,
    DXGI_FORMAT_R32G32B32A32_UINT,
    DXGI_FORMAT_R32G32B32A32_SINT,
    DXGI_FORMAT_R32G32B32_TYPELESS,
    DXGI_FORMAT_R32G32B32_FLOAT,
    DXGI_FORMAT_R32G32B32_UINT,
    DXGI_FORMAT_R32G32B32_SINT,
    DXGI_FORMAT_R16G16B16A16_TYPELESS,
    DXGI_FORMAT_R16G16B16A16_FLOAT,
    DXGI_FORMAT_R16G16B16A16_UNORM,
    DXGI_FORMAT_R16G16B16A16_UINT,
    DXGI_FORMAT_R16G16B16A16_SNORM,
    DXGI_FORMAT_R16G16B16A16_SINT,
    DXGI_FORMAT_R32G32_TYPELESS,
    DXGI_FORMAT_R32G32_FLOAT,
    DXGI_FORMAT_R32G32_UINT,
    DXGI_FORMAT_R32G32_SINT,
    DXGI_FORMAT_R32G8X24_TYPELESS,
    DXGI_FORMAT_D32_FLOAT_S8X24_UINT,
    DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS,
    DXGI_FORMAT_X32_TYPELESS_G8X24_UINT,
    DXGI_FORMAT_R10G10B10A2_TYPELESS,
    DXGI_FORMAT_R10G10B10A2_UNORM,
    DXGI_FORMAT_R10G10B10A2_UINT,
    DXGI_FORMAT_R11G11B10_FLOAT,
    DXGI_FORMAT_R8G8B8A8_TYPELESS,
    DXGI_FORMAT_R8G8B8A8_UNORM,
    DXGI_FORMAT_R8G8B8A8_UNORM_SRGB,
    DXGI_FORMAT_R8G8B8A8_UINT,
    DXGI_FORMAT_R8G8B8A8_SNORM,
    DXGI_FORMAT_R8G8B8A8_SINT,
    DXGI_FORMAT_R16G16_TYPELESS,
    DXGI_FORMAT_R16G16_FLOAT,
    DXGI_FORMAT_R16G16_UNORM,
    DXGI_FORMAT_R16G16_UINT,
    DXGI_FORMAT_R16G16_SNORM,
    DXGI_FORMAT_R16G16_SINT,
    DXGI_FORMAT_R32_TYPELESS,
    DXGI_FORMAT_D32_FLOAT,
    DXGI_FORMAT_R32_FLOAT,
    DXGI_FORMAT_R32_UINT,
    DXGI_FORMAT_R32_SINT,
    DXGI_FORMAT_R24G8_TYPELESS,
    DXGI_FORMAT_D24_UNORM_S8_UINT,
    DXGI_FORMAT_R24_UNORM_X8_TYPELESS,
    DXGI_FORMAT_X24_TYPELESS_G8_UINT,
    DXGI_FORMAT_R8G8_TYPELESS,
    DXGI_FORMAT_R8G8_UNORM,
    DXGI_FORMAT_R8G8_UINT,
    DXGI_FORMAT_R8G8_SNORM,
    DXGI_FORMAT_R8G8_SINT,
    DXGI_FORMAT_R16_TYPELESS,
    DXGI_FORMAT_R16_FLOAT,
    DXGI_FORMAT_D16_UNORM,
    DXGI_FORMAT_R16_UNORM,
    DXGI_FORMAT_R16_UINT,
    DXGI_FORMAT_R16_SNORM,
    DXGI_FORMAT_R16_SINT,
    DXGI_FORMAT_R8_TYPELESS,
    DXGI_FORMAT_R8_UNORM,
    DXGI_FORMAT_R8_UINT,
    DXGI_FORMAT_R8_SNORM,
    DXGI_FORMAT_R8_SINT,
    DXGI_FORMAT_A8_UNORM,
    DXGI_FORMAT_R1_UNORM,
    DXGI_FORMAT_R9G9B9E5_SHAREDEXP,
    DXGI_FORMAT_R8G8_B8G8_UNORM,
    DXGI_FORMAT_G8R8_G8B8_UNORM,
    DXGI_FORMAT_BC1_TYPELESS,
    DXGI_FORMAT_BC1_UNORM,
    DXGI_FORMAT_BC1_UNORM_SRGB,
    DXGI_FORMAT_BC2_TYPELESS,
    DXGI_FORMAT_BC2_UNORM,
    DXGI_FORMAT_BC2_UNORM_SRGB,
    DXGI_FORMAT_BC3_TYPELESS,
    DXGI_FORMAT_BC3_UNORM,
    DXGI_FORMAT_BC3_UNORM_SRGB,
    DXGI_FORMAT_BC4_TYPELESS,
    DXGI_FORMAT_BC4_UNORM,
    DXGI_FORMAT_BC4_SNORM,
    DXGI_FORMAT_BC5_TYPELESS,
    DXGI_FORMAT_BC5_UNORM,
    DXGI_FORMAT_BC5_SNORM,
    DXGI_FORMAT_B5G6R5_UNORM,
    DXGI_FORMAT_B5G5R5A1_UNORM,
    DXGI_FORMAT_B8G8R8A8_UNORM,
    DXGI_FORMAT_B8G8R8X8_UNORM,
    DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM,
    DXGI_FORMAT_B8G8R8A8_TYPELESS,
    DXGI_FORMAT_B8G8R8A8_UNORM_SRGB,
    DXGI_FORMAT_B8G8R8X8_TYPELESS,
    DXGI_FORMAT_B8G8R8X8_UNORM_SRGB,
    DXGI_FORMAT_BC6H_TYPELESS,
    DXGI_FORMAT_BC6H_UF16,
    DXGI_FORMAT_BC6H_SF16,
    DXGI_FORMAT_BC7_TYPELESS,
    DXGI_FORMAT_BC7_UNORM,
    DXGI_FORMAT_BC7_UNORM_SRGB,
    DXGI_FORMAT_AYUV,
    DXGI_FORMAT_Y410,
    DXGI_FORMAT_Y416,
    DXGI_FORMAT_NV12,
    DXGI_FORMAT_P010,
    DXGI_FORMAT_P016,
    DXGI_FORMAT_420_OPAQUE,
    DXGI_FORMAT_YUY2,
    DXGI_FORMAT_Y210,
    DXGI_FORMAT_Y216,
    DXGI_FORMAT_NV11,
    DXGI_FORMAT_AI44,
    DXGI_FORMAT_IA44,
    DXGI_FORMAT_P8,
    DXGI_FORMAT_A8P8,
    DXGI_FORMAT_B4G4R4A4_UNORM,
    DXGI_FORMAT_P208,
    DXGI_FORMAT_V208,
    DXGI_FORMAT_V408,
    DXGI_FORMAT_SAMPLER_FEEDBACK_MIN_MIP_OPAQUE,
    DXGI_FORMAT_SAMPLER_FEEDBACK_MIP_REGION_USED_OPAQUE,
    DXGI_FORMAT_FORCE_UINT
};

enum DDSFlags : u32 {
    DDSD_CAPS = 0x1,
    DDSD_HEIGHT = 0x2,
    DDSD_WIDTH = 0x4,
    DDSD_PITCH = 0x8,
    DDSD_PIXELFORMAT = 0x1000,
    DDSD_MIPMAPCOUNT = 0x20000,
    DDSD_LINEARSIZE = 0x80000,
    DDSD_DEPTH = 0x800000,
};

enum PixelFormatFlags : u32 {
    DDPF_ALPHAPIXELS = 0x1,
    DDPF_ALPHA = 0x2,
    DDPF_FOURCC = 0x4,
    DDPF_PALETTEINDEXED8 = 0x20,
    DDPF_RGB = 0x40,
    DDPF_YUV = 0x200,
    DDPF_LUMINANCE = 0x20000,
    DDPF_BUMPDUDV = 0x80000,
    DDPF_NORMAL = 0x80000000,
};

struct DDSPixelFormat {
    u32 size {};
    u32 flags {};
    u32 four_cc {};
    u32 rgb_bit_count {};
    u32 r_bit_mask {};
    u32 g_bit_mask {};
    u32 b_bit_mask {};
    u32 a_bit_mask {};
};

struct DDSHeader {
    u32 size {};
    u32 flags {};
    u32 height {};
    u32 width {};
    u32 pitch {};
    u32 depth {};
    u32 mip_map_count {};
    u32 reserved[11];
    DDSPixelFormat pixel_format;
    u32 caps1 {};
    u32 caps2 {};
    u32 caps3 {};
    u32 caps4 {};
    u32 reserved2 {};
};

struct DDSHeaderDXT10 {
    DXGIFormat format {};
    u32 resource_dimension {};
    u32 misc_flag {};
    u32 array_size {};
    u32 misc_flag2 {};
};

RefPtr<Gfx::Bitmap> load_dds(String const& path);
RefPtr<Gfx::Bitmap> load_dds_from_memory(u8 const*, size_t, String const& mmap_name = "<memory>");

struct DDSLoadingContext;

class DDSImageDecoderPlugin final : public ImageDecoderPlugin {
public:
    virtual ~DDSImageDecoderPlugin() override;
    DDSImageDecoderPlugin(const u8*, size_t);

    virtual IntSize size() override;
    virtual RefPtr<Gfx::Bitmap> bitmap() override;
    virtual void set_volatile() override;
    [[nodiscard]] virtual bool set_nonvolatile(bool& was_purged) override;
    virtual bool sniff() override;
    virtual bool is_animated() override;
    virtual size_t loop_count() override;
    virtual size_t frame_count() override;
    virtual ImageFrameDescriptor frame(size_t i) override;

private:
    OwnPtr<DDSLoadingContext> m_context;
    void dump_debug();
};

}