Function stbi__hdr_load

lite/example/cpp_example/mge/cv/stb_image.h:7822–7978

}

static float* stbi__hdr_load(
        stbi__context* s, int* x, int* y, int* comp, int req_comp,
        stbi__result_info* ri) {
    char buffer[STBI__HDR_BUFLEN];
    char* token;
    int valid = 0;
    int width, height;
    stbi_uc* scanline;
    float* hdr_data;
    int len;
    unsigned char count, value;
    int i, j, k, c1, c2, z;
    const char* headerToken;
    STBI_NOTUSED(ri);

    // Check identifier
    headerToken = stbi__hdr_gettoken(s, buffer);
    if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
        return stbi__errpf("not HDR", "Corrupt HDR image");

    // Parse header
    for (;;) {
        token = stbi__hdr_gettoken(s, buffer);
        if (token[0] == 0)
            break;
        if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0)
            valid = 1;
    }

    if (!valid)
        return stbi__errpf("unsupported format", "Unsupported HDR format");

    // Parse width and height
    // can't use sscanf() if we're not using stdio!
    token = stbi__hdr_gettoken(s, buffer);
    if (strncmp(token, "-Y ", 3))
        return stbi__errpf("unsupported data layout", "Unsupported HDR format");
    token += 3;
    height = (int)strtol(token, &token, 10);
    while (*token == ' ')
        ++token;
    if (strncmp(token, "+X ", 3))
        return stbi__errpf("unsupported data layout", "Unsupported HDR format");
    token += 3;
    width = (int)strtol(token, NULL, 10);

    if (height > STBI_MAX_DIMENSIONS)
        return stbi__errpf("too large", "Very large image (corrupt?)");
    if (width > STBI_MAX_DIMENSIONS)
        return stbi__errpf("too large", "Very large image (corrupt?)");

    *x = width;
    *y = height;

    if (comp)
        *comp = 3;
    if (req_comp == 0)
        req_comp = 3;