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Commit 06c564c4 authored by André Anjos's avatar André Anjos :speech_balloon:
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[pnmio.cpp] Fix readout of images containing empty lines (such as those produced by GIMP)

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1 merge request!43Fix readout of netpbm images containing empty lines (such as those produced by GIMP)
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bob/io/image/cpp/pnmio.cpp
+ 61
− 84
View file @ 06c564c4
...@@ -25,6 +25,7 @@ ...@@ -25,6 +25,7 @@
#include <ctype.h> #include <ctype.h>
#include <string.h> #include <string.h>
#include <math.h> #include <math.h>
#include <iostream>
#include "pnmio.h" #include "pnmio.h"
#define MAXLINE 1024 #define MAXLINE 1024
...@@ -34,6 +35,25 @@ ...@@ -34,6 +35,25 @@
#define RGB_TYPE 1 /* used for PFM */ #define RGB_TYPE 1 /* used for PFM */
/* line_start
* Tells if a line should be ignored (completely empty or contains a comment)
* Returns: non-null if we should start reading from that position.
*/
static char* line_start (char* line) {
char* start = line;
int size = strnlen(line, MAXLINE);
for (int i = 0; i < size; ++i, ++start) {
if (isspace(*start)) continue;
if (isgraph(*start)) {
if ((*start) == '#') start = NULL;
break;
}
}
if (start == (line+size)) start = NULL; /* end-of-line ignore it */
return start;
}
/* get_pnm_type: /* get_pnm_type:
* Read the header contents of a PBM/PGM/PPM/PFM file up to the point of * Read the header contents of a PBM/PGM/PPM/PFM file up to the point of
* extracting its type. Valid types for a PNM image are as follows: * extracting its type. Valid types for a PNM image are as follows:
...@@ -51,26 +71,16 @@ ...@@ -51,26 +71,16 @@
*/ */
int get_pnm_type(FILE *f) int get_pnm_type(FILE *f)
{ {
int flag=0;
int pnm_type=0; int pnm_type=0;
unsigned int i;
char magic[MAXLINE]; char magic[MAXLINE];
char line[MAXLINE]; char line[MAXLINE];
/* Read the PNM/PFM file header. */ /* Read the PNM/PFM file header. */
while (fgets(line, MAXLINE, f) != NULL) { while (fgets(line, MAXLINE, f) != NULL) {
flag = 0; char* start = line_start(line);
for (i = 0; i < strlen(line); i++) { if (!start) continue; /* skip this line */
if (isgraph(line[i])) { sscanf(line, "%s", magic);
if ((line[i] == '#') && (flag == 0)) { break;
flag = 1;
}
}
}
if (flag == 0) {
sscanf(line, "%s", magic);
break;
}
} }
/* NOTE: This part can be written more succinctly, however, /* NOTE: This part can be written more succinctly, however,
...@@ -101,6 +111,7 @@ int get_pnm_type(FILE *f) ...@@ -101,6 +111,7 @@ int get_pnm_type(FILE *f)
return (pnm_type); return (pnm_type);
} }
/* read_pbm_header: /* read_pbm_header:
* Read the header contents of a PBM (Portable Binary Map) file. * Read the header contents of a PBM (Portable Binary Map) file.
* An ASCII PBM image file follows the format: * An ASCII PBM image file follows the format:
...@@ -114,35 +125,23 @@ int get_pnm_type(FILE *f) ...@@ -114,35 +125,23 @@ int get_pnm_type(FILE *f)
*/ */
int read_pbm_header(FILE *f, int *img_xdim, int *img_ydim, int *is_ascii) int read_pbm_header(FILE *f, int *img_xdim, int *img_ydim, int *is_ascii)
{ {
int flag=0;
int x_val, y_val; int x_val, y_val;
unsigned int i;
char magic[MAXLINE]; char magic[MAXLINE];
char line[MAXLINE]; char line[MAXLINE];
int count=0; int count=0;
/* Read the PBM file header. */ /* Read the PBM file header. */
while (fgets(line, MAXLINE, f) != NULL) { while (fgets(line, MAXLINE, f) != NULL) {
flag = 0; char* start = line_start(line);
for (i = 0; i < strlen(line); i++) { if (!start) continue; /* skip this line */
if (isgraph(line[i])) { if (count == 0) {
if ((line[i] == '#') && (flag == 0)) { count += sscanf(start, "%s %d %d", magic, &x_val, &y_val);
flag = 1; } else if (count == 1) {
} count += sscanf(start, "%d %d", &x_val, &y_val);
} } else if (count == 2) {
} count += sscanf(start, "%d", &y_val);
if (flag == 0) {
if (count == 0) {
count += sscanf(line, "%s %d %d", magic, &x_val, &y_val);
} else if (count == 1) {
count += sscanf(line, "%d %d", &x_val, &y_val);
} else if (count == 2) {
count += sscanf(line, "%d", &y_val);
}
}
if (count == 3) {
break;
} }
if (count == 3) break;
} }
if (strcmp(magic, "P1") == 0) { if (strcmp(magic, "P1") == 0) {
...@@ -176,37 +175,26 @@ int read_pbm_header(FILE *f, int *img_xdim, int *img_ydim, int *is_ascii) ...@@ -176,37 +175,26 @@ int read_pbm_header(FILE *f, int *img_xdim, int *img_ydim, int *is_ascii)
*/ */
int read_pgm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors, int *is_ascii) int read_pgm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors, int *is_ascii)
{ {
int flag=0;
int x_val, y_val, maxcolors_val; int x_val, y_val, maxcolors_val;
unsigned int i;
char magic[MAXLINE]; char magic[MAXLINE];
char line[MAXLINE]; char line[MAXLINE];
int count=0; int count=0;
/* Read the PGM file header. */ /* Read the PGM file header. */
while (fgets(line, MAXLINE, f) != NULL) { while (fgets(line, MAXLINE, f) != NULL) {
flag = 0; char* start = line_start(line);
for (i = 0; i < strlen(line); i++) { if (!start) continue; /* skip this line */
if (isgraph(line[i]) && (flag == 0)) { if (count == 0) {
if ((line[i] == '#') && (flag == 0)) { count += sscanf(start, "%s %d %d %d", magic, &x_val, &y_val,
flag = 1; &maxcolors_val);
} } else if (count == 1) {
} count += sscanf(start, "%d %d %d", &x_val, &y_val, &maxcolors_val);
} } else if (count == 2) {
if (flag == 0) { count += sscanf(start, "%d %d", &y_val, &maxcolors_val);
if (count == 0) { } else if (count == 3) {
count += sscanf(line, "%s %d %d %d", magic, &x_val, &y_val, &maxcolors_val); count += sscanf(start, "%d", &maxcolors_val);
} else if (count == 1) {
count += sscanf(line, "%d %d %d", &x_val, &y_val, &maxcolors_val);
} else if (count == 2) {
count += sscanf(line, "%d %d", &y_val, &maxcolors_val);
} else if (count == 3) {
count += sscanf(line, "%d", &maxcolors_val);
}
}
if (count == 4) {
break;
} }
if (count == 4) break;
} }
if (strcmp(magic, "P2") == 0) { if (strcmp(magic, "P2") == 0) {
...@@ -241,37 +229,26 @@ int read_pgm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors, int ...@@ -241,37 +229,26 @@ int read_pgm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors, int
*/ */
int read_ppm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors, int *is_ascii) int read_ppm_header(FILE *f, int *img_xdim, int *img_ydim, int *img_colors, int *is_ascii)
{ {
int flag=0;
int x_val, y_val, maxcolors_val; int x_val, y_val, maxcolors_val;
unsigned int i;
char magic[MAXLINE]; char magic[MAXLINE];
char line[MAXLINE]; char line[MAXLINE];
int count=0; int count=0;
/* Read the PPM file header. */ /* Read the PPM file header. */
while (fgets(line, MAXLINE, f) != NULL) { while (fgets(line, MAXLINE, f) != NULL) {
flag = 0; char* start = line_start(line);
for (i = 0; i < strlen(line); i++) { if (!start) continue; /* skip this line */
if (isgraph(line[i]) && (flag == 0)) { if (count == 0) {
if ((line[i] == '#') && (flag == 0)) { count += sscanf(start, "%s %d %d %d", magic, &x_val, &y_val,
flag = 1; &maxcolors_val);
} } else if (count == 1) {
} count += sscanf(start, "%d %d %d", &x_val, &y_val, &maxcolors_val);
} } else if (count == 2) {
if (flag == 0) { count += sscanf(start, "%d %d", &y_val, &maxcolors_val);
if (count == 0) { } else if (count == 3) {
count += sscanf(line, "%s %d %d %d", magic, &x_val, &y_val, &maxcolors_val); count += sscanf(start, "%d", &maxcolors_val);
} else if (count == 1) {
count += sscanf(line, "%d %d %d", &x_val, &y_val, &maxcolors_val);
} else if (count == 2) {
count += sscanf(line, "%d %d", &y_val, &maxcolors_val);
} else if (count == 3) {
count += sscanf(line, "%d", &maxcolors_val);
}
}
if (count == 4) {
break;
} }
if (count == 4) break;
} }
if (strcmp(magic, "P3") == 0) { if (strcmp(magic, "P3") == 0) {
...@@ -433,7 +410,7 @@ int write_pbm_file(FILE *f, int *img_out, ...@@ -433,7 +410,7 @@ int write_pbm_file(FILE *f, int *img_out,
fprintf(f, "%d %d\n", x_scaled_size, y_scaled_size); fprintf(f, "%d %d\n", x_scaled_size, y_scaled_size);
/* Write the image data. */ /* Write the image data. */
for (i = 0; i < y_scaled_size; i++) { for (i = 0; i < y_scaled_size; ++i) {
for (j = 0; j < x_scaled_size; j+=step) { for (j = 0; j < x_scaled_size; j+=step) {
if (is_ascii == 1) { if (is_ascii == 1) {
fprintf(f, "%d ", img_out[i*x_scaled_size+j]); fprintf(f, "%d ", img_out[i*x_scaled_size+j]);
...@@ -485,7 +462,7 @@ int write_pgm_file(FILE *f, int *img_out, ...@@ -485,7 +462,7 @@ int write_pgm_file(FILE *f, int *img_out,
fprintf(f, "%d\n", img_colors); fprintf(f, "%d\n", img_colors);
/* Write the image data. */ /* Write the image data. */
for (i = 0; i < y_scaled_size; i++) { for (i = 0; i < y_scaled_size; ++i) {
for (j = 0; j < x_scaled_size; j++) { for (j = 0; j < x_scaled_size; j++) {
if (is_ascii == 1) { if (is_ascii == 1) {
fprintf(f, "%d ", img_out[i*x_scaled_size+j]); fprintf(f, "%d ", img_out[i*x_scaled_size+j]);
...@@ -531,7 +508,7 @@ int write_ppm_file(FILE *f, int *img_out, ...@@ -531,7 +508,7 @@ int write_ppm_file(FILE *f, int *img_out,
fprintf(f, "%d\n", img_colors); fprintf(f, "%d\n", img_colors);
/* Write the image data. */ /* Write the image data. */
for (i = 0; i < y_scaled_size; i++) { for (i = 0; i < y_scaled_size; ++i) {
for (j = 0; j < x_scaled_size; j++) { for (j = 0; j < x_scaled_size; j++) {
if (is_ascii == 1) { if (is_ascii == 1) {
fprintf(f, "%d %d %d ", fprintf(f, "%d %d %d ",
......
bob/io/image/data/test_spaces.pgm 0 → 100644
+ 6
− 0
View file @ 06c564c4
P5
# CREATOR: GIMP PNM Filter Version 1.1
100 100
255
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bob/io/image/test.py
+ 3
− 2
View file @ 06c564c4
...@@ -101,6 +101,7 @@ def test_netpbm(): ...@@ -101,6 +101,7 @@ def test_netpbm():
transcode(test_utils.datafile('test.ppm', __name__)) # indexed, works fine transcode(test_utils.datafile('test.ppm', __name__)) # indexed, works fine
transcode(test_utils.datafile('test_2.pgm', __name__)) # indexed, works fine transcode(test_utils.datafile('test_2.pgm', __name__)) # indexed, works fine
transcode(test_utils.datafile('test_2.ppm', __name__)) # indexed, works fine transcode(test_utils.datafile('test_2.ppm', __name__)) # indexed, works fine
transcode(test_utils.datafile('test_spaces.pgm', __name__)) # indexed, works fine
# transcode(test_utils.datafile('test.jpg', __name__)) #does not work # transcode(test_utils.datafile('test.jpg', __name__)) #does not work
# because of re-compression # because of re-compression
...@@ -112,8 +113,8 @@ def notest_gif(): ...@@ -112,8 +113,8 @@ def notest_gif():
def test_image_load(): def test_image_load():
# test that the generic bob.io.image.load function works as expected # test that the generic bob.io.image.load function works as expected
for filename in ('test.jpg', 'cmyk.jpg', 'test.pbm', 'test_corrupted.pbm', for filename in ('test.jpg', 'cmyk.jpg', 'test.pbm', 'test_corrupted.pbm',
'test.pgm', 'test_corrupted.pgm', 'test.ppm', 'test_corrupted.ppm', 'test.pgm', 'test_corrupted.pgm', 'test_spaces.pgm', 'test.ppm',
'img_rgba_color.png', 'test.gif'): 'test_corrupted.ppm', 'img_rgba_color.png', 'test.gif'):
full_file = test_utils.datafile(filename, __name__) full_file = test_utils.datafile(filename, __name__)
# load with just image name # load with just image name
i1 = bob.io.image.load(full_file) i1 = bob.io.image.load(full_file)
......
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