Exemplos de imb_is_a_jpeg em C++ (Cpp)

Exemplo n.º 1

ImBuf * imb_load_jpeg (unsigned char * buffer, size_t size, int flags)
{
    struct jpeg_decompress_struct _cinfo, *cinfo = &_cinfo;
    struct my_error_mgr jerr;
    ImBuf * ibuf;

    if(!imb_is_a_jpeg(buffer)) return NULL;

    cinfo->err = jpeg_std_error(&jerr.pub);
    jerr.pub.error_exit = jpeg_error;

    /* Establish the setjmp return context for my_error_exit to use. */
    if (setjmp(jerr.setjmp_buffer)) {
        /* If we get here, the JPEG code has signaled an error.
         * We need to clean up the JPEG object, close the input file, and return.
         */
        jpeg_destroy_decompress(cinfo);
        return NULL;
    }

    jpeg_create_decompress(cinfo);
    memory_source(cinfo, buffer, size);

    ibuf = ibJpegImageFromCinfo(cinfo, flags);

    return(ibuf);
}

Exemplo n.º 2

Arquivo: readimage.c Projeto: jinjoh/NOOR

ImBuf *IMB_ibImageFromMemory(int *mem, int size, int flags) {
    int len;
    struct ImBuf *ibuf;

    if (mem == NULL) {
        printf("Error in ibImageFromMemory: NULL pointer\n");
    } else {
        if ((GS(mem) == IMAGIC) || (GSS(mem) == IMAGIC)) {
            return (imb_loadiris((uchar *) mem, flags));
        } else if (imb_is_a_jpeg((uchar *)mem)) {
            return (imb_ibJpegImageFromMemory((uchar *)mem, size, flags));
        }

        if (GET_ID(mem) == CAT) {
            mem += 3;
            size -= 4;
            while (size > 0) {
                if (GET_ID(mem) == FORM) {
                    len = ((GET_BIG_LONG(mem+1) + 1) & ~1) + 8;
                    if ((GET_ID(mem+2) == ILBM) || (GET_ID(mem+2) == ANIM)) break;
                    mem = (int *)((uchar *)mem +len);
                    size -= len;
                } else return(0);
            }
        }

        if (size > 0) {
            if (GET_ID(mem) == FORM) {
                if (GET_ID(mem+2) == ILBM) {
                    return (imb_loadamiga(mem, flags));
                } else if (GET_ID(mem+5) == ILBM) {			/* animaties */
                    return (imb_loadamiga(mem+3, flags));
                } else if (GET_ID(mem+2) == ANIM) {
                    return (imb_loadanim(mem, flags));
                }
            }
        }

        ibuf = imb_loadpng((uchar *)mem, size, flags);
        if (ibuf) return(ibuf);

        ibuf = imb_bmp_decode((uchar *)mem, size, flags);
        if (ibuf) return(ibuf);

        ibuf = imb_loadtarga((uchar *)mem, size, flags);
        if (ibuf) return(ibuf);

        ibuf = imb_loaddpx((uchar *)mem, size, flags);
        if (ibuf) return(ibuf);

        ibuf = imb_loadcineon((uchar *)mem, size, flags);
        if (ibuf) return(ibuf);

        if (G.have_libtiff) {
            ibuf = imb_loadtiff((uchar *)mem, size, flags);
            if (ibuf) return(ibuf);
        }

        ibuf = imb_loadhdr((uchar*)mem, size, flags);
        if (ibuf) return (ibuf);

#ifdef WITH_OPENEXR
        ibuf = imb_load_openexr((uchar *)mem, size, flags);
        if (ibuf) return (ibuf);
#endif

#ifdef WITH_OPENJPEG
        ibuf = imb_jp2_decode((uchar *)mem, size, flags);
        if (ibuf) return (ibuf);
#endif

#ifdef WITH_DDS
        ibuf = imb_load_dds((uchar *)mem, size, flags);
        if (ibuf) return (ibuf);
#endif

#ifdef WITH_QUICKTIME
#if defined(_WIN32) || defined (__APPLE__)
        if(G.have_quicktime) {
            ibuf = imb_quicktime_decode((uchar *)mem, size, flags);
            if (ibuf) return(ibuf);
        }
#endif
#endif

        if (IB_verbose) fprintf(stderr, "Unknown fileformat\n");
    }

    return (0);
}