Pillow

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/*
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 * The Python Imaging Library
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 * $Id$
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 *
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 * built-in image file handling
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 *
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 * history:
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 * 1995-11-26 fl  Created, supports PGM/PPM
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 * 1996-08-07 fl  Write "1" images as PGM
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 * 1999-02-21 fl  Don't write non-standard modes
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 *
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 * Copyright (c) 1997-99 by Secret Labs AB.
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 * Copyright (c) 1995-96 by Fredrik Lundh.
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 *
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 * See the README file for information on usage and redistribution.
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 */
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#include "Imaging.h"
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#include <ctype.h>
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int
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ImagingSaveRaw(Imaging im, FILE *fp) {
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    int x, y, i;
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    if (strcmp(im->mode, "1") == 0 || strcmp(im->mode, "L") == 0) {
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        /* @PIL227: FIXME: for mode "1", map != 0 to 255 */
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        /* PGM "L" */
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        for (y = 0; y < im->ysize; y++) {
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            fwrite(im->image[y], 1, im->xsize, fp);
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        }
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    } else {
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        /* PPM "RGB" or other internal format */
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        for (y = 0; y < im->ysize; y++) {
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            for (x = i = 0; x < im->xsize; x++, i += im->pixelsize) {
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                fwrite(im->image[y] + i, 1, im->bands, fp);
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            }
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        }
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    }
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    return 1;
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}
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int
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ImagingSavePPM(Imaging im, const char *outfile) {
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    FILE *fp;
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    if (!im) {
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        (void)ImagingError_ValueError(NULL);
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        return 0;
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    }
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    fp = fopen(outfile, "wb");
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    if (!fp) {
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        (void)ImagingError_OSError();
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        return 0;
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    }
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    if (strcmp(im->mode, "1") == 0 || strcmp(im->mode, "L") == 0) {
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        /* Write "PGM" */
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        fprintf(fp, "P5\n%d %d\n255\n", im->xsize, im->ysize);
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    } else if (strcmp(im->mode, "RGB") == 0) {
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        /* Write "PPM" */
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        fprintf(fp, "P6\n%d %d\n255\n", im->xsize, im->ysize);
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    } else {
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        fclose(fp);
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        (void)ImagingError_ModeError();
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        return 0;
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    }
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    ImagingSaveRaw(im, fp);
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    fclose(fp);
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    return 1;
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}
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