linux-wallpaperengine-kde/WallpaperEngine/Irrlicht/CImageLoaderTEX.h

#pragma once

#include <irrlicht/irrlicht.h>

using namespace irr;
using namespace irr::video;

namespace WallpaperEngine::Irrlicht
{
    //!  Surface Loader for PNG files
    class CImageLoaderTex : public IImageLoader
    {
    public:

        //! returns true if the file maybe is able to be loaded by this class
        //! based on the file extension (e.g. ".png")
        virtual bool isALoadableFileExtension(const io::path& filename) const;

        //! returns true if the file maybe is able to be loaded by this class
        virtual bool isALoadableFileFormat(io::IReadFile* file) const;

        //! creates a surface from the file
        virtual IImage* loadImage(io::IReadFile* input) const;

        virtual void loadImageFromARGB8Data (IImage* output, const char* input, u32 width, u32 height, u32 mipmap_width) const;

        virtual void loadImageFromDXT1 (IImage* output, const char* input, u32 destination_width, u32 destination_height, u32 origin_width, u32 origin_height) const;
        virtual void loadImageFromDXT5 (IImage* output, const char* input, u32 destination_width, u32 destination_height, u32 origin_width, u32 origin_height) const;

    private:
        void BlockDecompressImageDXT1(unsigned long width, unsigned long height, const unsigned char *blockStorage, unsigned long *image) const;
        void DecompressBlockDXT1(unsigned long x, unsigned long y, unsigned long width, const unsigned char *blockStorage, unsigned long *image) const;
        unsigned long PackRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a) const;
        void BlockDecompressImageDXT5(unsigned long width, unsigned long height, const unsigned char *blockStorage, unsigned long *image) const;
        void DecompressBlockDXT5(unsigned long x, unsigned long y, unsigned long width, const unsigned char *blockStorage, unsigned long *image) const;

        enum TextureFormat
        {
            ARGB8888,
            RA88,
            A8,
            DXT5,
            DXT3,
            DXT1
        };

        // extracted from the free image library
        enum FREE_IMAGE_FORMAT
        {
            FIF_UNKNOWN = -1,
            FIF_BMP		= 0,
            FIF_ICO		= 1,
            FIF_JPEG	= 2,
            FIF_JNG		= 3,
            FIF_KOALA	= 4,
            FIF_LBM		= 5,
            FIF_IFF     = FIF_LBM,
            FIF_MNG		= 6,
            FIF_PBM		= 7,
            FIF_PBMRAW	= 8,
            FIF_PCD		= 9,
            FIF_PCX		= 10,
            FIF_PGM		= 11,
            FIF_PGMRAW	= 12,
            FIF_PNG		= 13,
            FIF_PPM		= 14,
            FIF_PPMRAW	= 15,
            FIF_RAS		= 16,
            FIF_TARGA	= 17,
            FIF_TIFF	= 18,
            FIF_WBMP	= 19,
            FIF_PSD		= 20,
            FIF_CUT		= 21,
            FIF_XBM		= 22,
            FIF_XPM		= 23,
            FIF_DDS		= 24,
            FIF_GIF     = 25,
            FIF_HDR		= 26,
            FIF_FAXG3	= 27,
            FIF_SGI		= 28,
            FIF_EXR		= 29,
            FIF_J2K		= 30,
            FIF_JP2		= 31,
            FIF_PFM		= 32,
            FIF_PICT	= 33,
            FIF_RAW		= 34,
            FIF_WEBP	= 35,
            FIF_JXR     = 36
        };
    };
}