decompress.h

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// clang-tidy: ignore
 
#pragma once
 
namespace eu::core
{
    // Decompress is slighly modified code from the imgui repo, only to remove the use of global variables
    // this is mainly here so we can use the handy compression tool from the imgui distro for files other than fonts
    //
    // The following note is from imgui repo comment:
    //
    //-----------------------------------------------------------------------------
    // Compressed with stb_compress() then converted to a C array and encoded as base85.
    // Use the program in misc/fonts/binary_to_compressed_c.cpp to create the array from a TTF file.
    // The purpose of encoding as base85 instead of "0x00,0x01,..." style is only save on _source code_ size.
    // Decompression from stb.h (public domain) by Sean Barrett https://github.com/nothings/stb/blob/master/stb.h
    //-----------------------------------------------------------------------------
 
    struct Decompressor
    {
        unsigned char* stb_barrier_out_e = nullptr, * stb_barrier_out_b = nullptr;
        const unsigned char* stb_barrier_in_b = nullptr;
        unsigned char* stb_dout = nullptr;
 
        unsigned int stb_decompress(unsigned char *output, const unsigned char *i, unsigned int /*length*/);
        void stb_match(const unsigned char *data, unsigned int length);
        void stb_lit(const unsigned char *data, unsigned int length);
        const unsigned char *stb_decompress_token(const unsigned char *i);
        unsigned int stb_adler32(unsigned int adler32, unsigned char *buffer, unsigned int buflen);
 
        static unsigned int stb_decompress_length(const unsigned char* input);
    };
 
}