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bb1b3a532c
find * -type f "-(" -name "*.bdf" -o -name "*.c" -o -name "*.h" -o -name "*.py" -o -name "*.rst" -o -name "*.txt" "-)" -exec sed -e "s/[[:space:]]*$//" -i {} \;
194 lines
3.3 KiB
C
194 lines
3.3 KiB
C
/*
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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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Imaging
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ImagingOpenPPM(const char* infile)
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{
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FILE* fp;
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int i, c, v;
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char* mode;
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int x, y, max;
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Imaging im;
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if (!infile)
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return ImagingError_ValueError(NULL);
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fp = fopen(infile, "rb");
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if (!fp)
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return ImagingError_IOError();
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/* PPM magic */
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if (fgetc(fp) != 'P')
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goto error;
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switch (fgetc(fp)) {
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case '4': /* FIXME: 1-bit images are not yet supported */
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goto error;
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case '5':
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mode = "L";
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break;
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case '6':
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mode = "RGB";
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break;
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default:
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goto error;
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}
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i = 0;
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c = fgetc(fp);
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x = y = max = 0;
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while (i < 3) {
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/* Ignore optional comment fields */
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while (c == '\n') {
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c = fgetc(fp);
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if (c == '#') {
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do {
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c = fgetc(fp);
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if (c == EOF)
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goto error;
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} while (c != '\n');
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c = fgetc(fp);
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}
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}
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/* Skip forward to next value */
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while (isspace(c))
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c = fgetc(fp);
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/* And parse it */
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v = 0;
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while (isdigit(c)) {
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v = v * 10 + (c - '0');
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c = fgetc(fp);
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}
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if (c == EOF)
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goto error;
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switch (i++) {
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case 0:
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x = v;
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break;
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case 1:
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y = v;
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break;
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case 2:
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max = v;
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break;
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}
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}
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im = ImagingNew(mode, x, y);
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if (!im)
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return NULL;
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/* if (max != 255) ... FIXME: does anyone ever use this feature? */
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if (strcmp(im->mode, "L") == 0) {
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/* PPM "L" */
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for (y = 0; y < im->ysize; y++)
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if (fread(im->image[y], im->xsize, 1, fp) != 1)
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goto error;
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} else {
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/* PPM "RGB" or PyPPM mode */
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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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if (fread(im->image[y]+i, im->bands, 1, fp) != 1)
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goto error;
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}
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fclose(fp);
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return im;
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error:
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fclose(fp);
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return ImagingError_IOError();
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}
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int
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ImagingSaveRaw(Imaging im, FILE* fp)
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{
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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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} 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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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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{
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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_IOError();
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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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(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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