C++ pm_openr函数代码示例

static void
processMapFile(const char *   const mapFileName,
               struct pam *   const outpamCommonP,
               tupletable *   const colormapP,
               unsigned int * const colormapSizeP,
               tuple *        const firstColorP) {
/*----------------------------------------------------------------------------
   Read a color map from the file named 'mapFileName'.  It's a map that
   associates each color in that file with a unique whole number.  Return the
   map as *colormapP, with the number of entries in it as *colormapSizeP.

   Also determine the first color (top left) in the map file and return that
   as *firstColorP.
-----------------------------------------------------------------------------*/
    FILE * mapfile;
    struct pam mappam;
    tuple ** maptuples;
    tuple firstColor;

    mapfile = pm_openr(mapFileName);
    maptuples = pnm_readpam(mapfile, &mappam, PAM_STRUCT_SIZE(tuple_type));
    pm_close(mapfile);

    computeColorMapFromMap(&mappam, maptuples, colormapP, colormapSizeP);

    firstColor = pnm_allocpamtuple(&mappam);
    pnm_assigntuple(&mappam, firstColor, maptuples[0][0]);
    *firstColorP = firstColor;

    pnm_freepamarray(maptuples, &mappam);

    *outpamCommonP = mappam; 
    outpamCommonP->file = stdout;
}

static void
getOrFakeAndMap(const char *      const andPgmFname,
                int               const xorCols,
                int               const xorRows,
                gray ***          const andPGMarrayP,
                pixval *          const andMaxvalP,
                colorhash_table * const andChtP,
                const char **     const errorP) {

    int andRows, andCols;
    
    if (!andPgmFname) {
        /* He's not supplying a bitmap for 'and'.  Fake the bitmap. */
        *andPGMarrayP = NULL;
        *andMaxvalP   = 1;
        *andChtP      = NULL;
        *errorP       = NULL;
    } else {
        FILE * andfile;
        andfile = pm_openr(andPgmFname);
        *andPGMarrayP = pgm_readpgm(andfile, &andCols, &andRows, andMaxvalP);
        pm_close(andfile);

        if ((andCols != xorCols) || (andRows != xorRows)) {
            asprintfN(errorP,
                      "And mask and image have different dimensions "
                     "(%d x %d vs %d x %d).  Aborting.",
                     andCols, xorCols, andRows, xorRows);
        } else
            *errorP = NULL;
    }
}

int
main(int argc, char *argv[]) {

    FILE * const ofP = stdout;

    struct cmdlineInfo cmdline;
    FILE* ifP;
    bool eof;

    pnm_init(&argc, argv);

    parseCommandLine(argc, argv, &cmdline);

    ifP = pm_openr(cmdline.inputFilespec);

    eof = FALSE;
    while (!eof) {
        cutOneImage(ifP, cmdline, ofP);
        pnm_nextimage(ifP, &eof);
    }

    pm_close(ifP);
    pm_close(ofP);
    
    return 0;
}

int
main(int argc, char *argv[]) {

    FILE* ifP;
    int eof;  /* No more images in input */
    unsigned int image_seq;  
        /* Sequence of current image in input file.  First = 0 */

    pnm_init( &argc, argv );

    parse_command_line(argc, argv, &cmdline);

    ifP = pm_openr(cmdline.input_file);

    eof = FALSE;
    for (image_seq = 0; !eof; image_seq++) {
        const char *output_file_name;  /* malloc'ed */
        compute_output_name(cmdline.output_file_pattern, cmdline.padname, 
                            image_seq,
                            &output_file_name);
        pm_message("WRITING %s\n", output_file_name);
        extract_one_image(ifP, output_file_name);
        strfree(output_file_name);
        pnm_nextimage(ifP, &eof);
    }

    pm_close(ifP);
    
    return 0;
}

int
main(int    argc,
     char * argv[]) {

    struct cmdlineInfo cmdline;
    FILE * ifP;
    unsigned int cols, rows;
    pixval maxval;
    xvPalette xvPalette;

    ppm_init(&argc, argv);

    parseCommandLine(argc, argv, &cmdline);

    ifP = pm_openr(cmdline.inputFileName);

    makeXvPalette(&xvPalette);

    readXvHeader(ifP, &cols, &rows, &maxval);

    writePpm(ifP, &xvPalette, cols, rows, maxval, stdout);

    pm_close(ifP);

    return 0;
}

static void
readPpmPalette(const char *   const paletteFileName,
               pixel       (* const ppmPaletteP)[], 
               unsigned int * const paletteSizeP) {

    FILE * pfP;
    pixel ** pixels;
    int cols, rows;
    pixval maxval;
    
    pfP = pm_openr(paletteFileName);

    pixels = ppm_readppm(pfP, &cols, &rows, &maxval);

    pm_close(pfP);
    
    *paletteSizeP = rows * cols;
    if (*paletteSizeP > MAXCOLORS) 
        pm_error("ordered palette image contains %d pixels.  Maximum is %d",
                 *paletteSizeP, MAXCOLORS);

    {
        int j;
        int row;
        j = 0;  /* initial value */
        for (row = 0; row < rows; ++row) {
            int col;
            for (col = 0; col < cols; ++col) 
                (*ppmPaletteP)[j++] = pixels[row][col];
        }
    }
    ppm_freearray(pixels, rows);
}        

int
main(int argc, const char *argv[]) {

    struct cmdlineInfo cmdline;
    FILE * ifP;

    pm_proginit(&argc, argv);

    parseCommandLine(argc, argv, &cmdline);

    ifP = pm_openr(cmdline.inputFileName);

    switch (cmdline.direction) {
    case DIR_TB:
        wipeoutTb(ifP, stdout);
        break;
    case DIR_LR:
        wipeoutLr(ifP, stdout);
        break;
    }

    pm_close(ifP);
    pm_close(stdout);

    return 0;
}

static void
readRelevantPixels(const char *   const inputFilename,
                   unsigned int   const hstepReq,
                   unsigned int   const vstepReq,
                   unsigned int * const hstepP,
                   unsigned int * const vstepP,
                   sample ***     const pixelsP,
                   struct pam *   const pamP,
                   unsigned int * const hsamplesP) {
/*----------------------------------------------------------------------------
  load the image, saving only the pixels we might actually inspect
-----------------------------------------------------------------------------*/
    FILE * ifP;
    unsigned int hstep;
    unsigned int vstep;

    ifP = pm_openr(inputFilename);
    pnm_readpaminit(ifP, pamP, PAM_STRUCT_SIZE(tuple_type));
    computeSteps(pamP, hstepReq, vstepReq, &hstep, &vstep);

    load(pamP, hstep, pixelsP, hsamplesP);

    *hstepP = hstep;
    *vstepP = vstep;
    
    pm_close(ifP);
}

int
main(int argc, char **argv) {

    struct cmdlineInfo cmdline;
    FILE * ifP;
    tuplen ** tuplenarray;
    struct pam inpam;
    double sharpness;

	pnm_init(&argc, argv);

    parseCommandLine(argc, argv, &cmdline);

    ifP = pm_openr(cmdline.inputFilespec);

	tuplenarray = pnm_readpamn(ifP, &inpam, PAM_STRUCT_SIZE(tuple_type));

    if (inpam.height < 3 || inpam.width < 3)
        pm_error("sharpness is undefined for an image less than 3 pixels "
                 "in all directions.  This image is %d x %d",
                 inpam.width, inpam.height);

    computeSharpness(&inpam, tuplenarray, &sharpness);

    printf("Sharpness = %f\n", sharpness);

	pnm_freepamarrayn(tuplenarray, &inpam);
    pm_close(ifP);
	return 0;
}

struct sourceManager * 
dsCreateSource(const char * const fileName) {

    struct sourceManager * srcP;

    MALLOCVAR(srcP);
    if (srcP == NULL)
        pm_error("Unable to get memory for the Jpeg library source manager.");

    srcP->ifP = pm_openr(fileName);

    srcP->jpegSourceMgr.init_source = dsInitSource;
    srcP->jpegSourceMgr.fill_input_buffer = dsFillInputBuffer;
    srcP->jpegSourceMgr.skip_input_data = dsSkipInputData;
    srcP->jpegSourceMgr.resync_to_restart = jpeg_resync_to_restart;
    srcP->jpegSourceMgr.term_source = dsTermSource;
    
    srcP->prematureEof = FALSE;
    srcP->currentBuffer = srcP->buffer1;
    srcP->nextBuffer = srcP->buffer2;
    srcP->jpegSourceMgr.bytes_in_buffer = 
        fread(srcP->currentBuffer, 1, BUFFER_SIZE, srcP->ifP);
    srcP->jpegSourceMgr.next_input_byte = srcP->currentBuffer;
    srcP->bytesInNextBuffer = 
        fread(srcP->nextBuffer, 1, BUFFER_SIZE, srcP->ifP);

    return srcP;
}

int
main(int argc, char * argv[]) {

    FILE* ifp;
    bit** bits;
    int rows, cols;
    const char * inputFilename;

    pbm_init(&argc, argv);

    if (argc-1 > 0)
        pm_error("Too many arguments (%d).  The only valid argument is an "
                 "input file name.", argc-1);
    else if (argc-1 == 1) 
        inputFilename = argv[1];
    else
        inputFilename = "-";

    ifp = pm_openr(inputFilename);
    
    bits = pbm_readpbm(ifp, &cols, &rows);

    if (rows > 255)
        pm_error("Image is too high:  %d rows.  Max height: 255 rows", rows);
    if (cols > 255)
        pm_error("Image is too wide:  %d cols.  Max width: 255 cols", cols);

    generateMo(stdout, bits, cols, rows);
    
    pm_close(ifp);

    pbm_freearray(bits, rows);

    exit(0);
}

static void
openFiles(struct CmdlineInfo const cmdline,
          unsigned int *     const fileCtP,
          struct pam **      const imgPamP,
          const char ***     const namesP) {

    unsigned int fileCt;
    struct pam * imgPam;
    const char ** names;

    fileCt = cmdline.nFiles > 0 ? cmdline.nFiles : 1;

    MALLOCARRAY(imgPam, fileCt);
    MALLOCARRAY(names, fileCt);

    if (!imgPam || !names)
        pm_error("out of memory");

    if (cmdline.nFiles > 0) {
        unsigned int i;

        for (i = 0; i < cmdline.nFiles; ++i) {
            imgPam[i].file = pm_openr(cmdline.inFileName[i]);
            names[i] = strdup(cmdline.inFileName[i]);
        }
    } else {
        imgPam[0].file = stdin;
        names[0] = strdup("stdin");
    }

    *fileCtP = fileCt;
    *imgPamP = imgPam;
    *namesP  = names;
}

static void
readMapFile(const char * const rmapFileName,
            xelval       const maxval,
            gray *       const lumamap) {

    int rmcols, rmrows; 
    gray rmmaxv;
    int rmformat;
    FILE * rmapfP;
        
    rmapfP = pm_openr(rmapFileName);
    pgm_readpgminit(rmapfP, &rmcols, &rmrows, &rmmaxv, &rmformat);
    
    if (rmmaxv != maxval)
        pm_error("maxval in map file (%u) different from input (%u)",
                 rmmaxv, maxval);
    
    if (rmrows != 1)
        pm_error("Map must have 1 row.  Yours has %u", rmrows);
    
    if (rmcols != maxval + 1)
        pm_error("Map must have maxval + 1 (%u) columns.  Yours has %u",
                 maxval + 1, rmcols);
    
    pgm_readpgmrow(rmapfP, lumamap, maxval+1, rmmaxv, rmformat);
    
    pm_close(rmapfP);
}

int
main(int argc, const char ** argv) {

    struct cmdlineInfo cmdline;
    FILE * ifP;
    IPDB * pdbP;
    int status;

    pm_proginit(&argc, argv);

    parseCommandLine(argc, argv, &cmdline);

    ifP = pm_openr(cmdline.inputFileName);

    pdbP = ipdb_alloc(NULL);
    if (pdbP == NULL)
        pm_error("Could not allocate IPDB structure.");

    status = ipdbRead(pdbP, ifP, cmdline.verbose);
    if (status != 0)
        pm_error("Image header read error: %s.", ipdb_err(status));

    writeImgPam(pdbP, stdout);

    writeText(pdbP, cmdline.notefile);

    ipdb_free(pdbP);

    pm_close(ifP);

    return EXIT_SUCCESS;
}

static void
initPatternPixel(outGenerator *     const outGenP,
                 struct cmdlineInfo const cmdline) {

    struct patternPixelState * stateP;
    FILE * patternFileP;

    MALLOCVAR_NOFAIL(stateP);

    patternFileP = pm_openr(cmdline.patFilespec);

    stateP->patTuples =
        pnm_readpam(patternFileP,
                    &stateP->patPam, PAM_STRUCT_SIZE(tuple_type));

    pm_close(patternFileP);

    stateP->xshift     = cmdline.xshift;
    stateP->yshift     = cmdline.yshift;
    stateP->magnifypat = cmdline.magnifypat;

    outGenP->stateP          = stateP;
    outGenP->getTuple        = &patternPixel;
    outGenP->terminateState  = &termPatternPixel;
    outGenP->pam.format      = stateP->patPam.format;
    outGenP->pam.plainformat = stateP->patPam.plainformat;
    outGenP->pam.depth       = stateP->patPam.depth;
    outGenP->pam.maxval      = stateP->patPam.maxval;
    strcpy(outGenP->pam.tuple_type, stateP->patPam.tuple_type);

    if (cmdline.verbose)
        reportImageParameters("Pattern file", &stateP->patPam);
}